The HD IP Cameramonitoring technology barriers
1, H.264 codec technology
The key to the popularity of high-definition IP Camera surveillance is the quality of the video codec, compression rate and network adaptability. HD IP Camera codec core needs are: minimize the bit rate at the same time, to obtain the best possible image quality. Network monitoring system mainstream codec is H.264, H.264 using a motion vector prediction value, the motion vector difference coding Columbus index encoding, the encoding is characterized by the smaller the value, the more bits less.
With the substantial increase in the amplitude of the motion vector H.264 IP Cameras for motion vector prediction and coding method of compression ratio will be gradually reduced, then with the video surveillance from SD to HD full forward, H .264 slightly inadequate.
But now a mainstream technology H.264 there will be a lot of limitations in the day-to-day infrared IP Camera surveillance, has been unable to meet the needs of the people in the high-definition network surveillance system, the emergence of H.265 has brought new hope. Tested, in the case of the same quality with H.264, H.265 obtained to gain an average of 6.1% of the compression, complicated image compression gain can be increased to even 20%. H.265 video compression algorithm standard efficiency than H.264 by about half, under the premise of ensuring the same video image quality, the bit rate of the video stream is reduced by 50%,
Can achieve transmission speeds of 1 to 2Mbps transmission 720P. The H.265 technology video compression than H.264 increased by 30 to 50% according to estimates potential investment savings up to 20%, is very impressive. However, the promotion of H.265 is also a gradual process.
2, high-definition monitors network traffic
HD IP Cameramonitoring system, the transmission on the IP network is a large number of video and audio signals, these signals characteristic is a liquid media, liquid media with the IP network is only recently a large number of emerging applications, initially, IP network design say it is not tailored to the transmission medium for the liquid medium of the surveillance video, the video stream transmission, the quality of service in such networks will be very difficult to guarantee.
Also, because the high-definition IP Camera video surveillance need to stream video large amount of data, network transmission can really do all packets arrive at the receiving terminal smoothly? Whether or not in the process of transmission dropped frames? Depending on the video surveillance business the right to speak in a variety of business IP-based network video surveillance business gradually become an important business in the IP applications, then I believe in the technology research and development will intensify our efforts to solve the technical barriers exist in high-definition network monitoring system . Due to the high-definition video surveillance video streams need to transfer the amount of data, if the network transmission cost is too high, will also affect the promotion process.
wireless camera IR IP Camera HD Camcorder ipcam Wired IP Camera Consumption IP Camera POE IP Camera Plug Play IP Camera HD IP Camera Wireless IP Camera IP Camera Network camera manufacturer
2013年4月23日星期二
the network surveillance camera resolution
Intelligent video analysis capabilities of the network surveillance camera resolution
Analog camera video surveillance system, seems to give the feeling of a kind of "integration", camera and sensor components are wrapped in a small space, if you want to try a different focal length of the camera, probably have to disassemble replacement; Network Camera lens and machine identity to leave, the focal length of the lens replacement is very convenient.
We say that the finished appearance of the core, network surveillance cameras have been able to support video analysis, the reason is an open platform. With the improved performance of the camera chip, there will be more chip resources are developed, so that more intelligent analysis of the IT elements embedded into the front-end equipment, but also allow more third-party video analysis software compatible to reach multiple intelligences options .
Simulation system is a closed structure-end equipment can not meet intelligent analysis function can only be transferred to the back-end storage systems DVR, DVR based on embedded Linux system the same as the open-source structure can be implanted in a different mode of analysis by video transmission to the front-end integration and analysis.
Comparison of front-end and back-end analysis
Network Camera support front-end intelligent analysis, simulation system for back-end analysis, one after the contrast has in theory be able to separate. The front-end the corresponding intelligent analysis, just need to analyze the results of treatment can spread to the back-end platform; while the back-end analysis requires that whole video image transmitted to the DVR, DVR resolution reached the platform, although the processing speed quickly, but can not help but still cause a certain time lag.
Perhaps in a small monitoring project, back-end intelligence analysis not qualify as a "disadvantage", but in the important financial sector or a wide range of monitoring, the meaning of race against time came to the fore.
Intelligent analysis of Network Cameras front support SD card storage
Turning to the pros and cons of problems, in fact, they are evenly divided. In the design, IPC smart front must support the front-end storage capabilities. Perhaps someone in the coursing, IPC supports SD card you can save the cost of the back-end storage. In fact, this view is wrong, SD card storage solutions supporting role: a network failure, the front-end alarm need to use SD card storage; its weakness is that is not conducive to a wide range of video management.
Front-end storage space is limited, so the codec requirements are very strict. I learned H.264 codec, Highprofile main application and network systems, most of the DVR recorders also using Mainprofile standards. The different decompression mode also reflects the final image generation effect.
The simulation system smart "rear to ensure the stability of the system, compared with the IP system intelligent front, emergencies lag does have an impact. Depending on the application different options for different trigger mode. Difficult to weigh the pros and cons of SD card storage can go long, whether analog cameras can be embedded intelligent modules in the future, these are still unknown.
The well-known network monitoring camera comes with intelligent analysis, video analysis of the front to the front-end equipment, faced with an emergency can be the first to respond to the alarm function. Network probes, analog cameras through the back-end DVR to determine whether the illegal invasion of behavior. In the difference between the two, I make a comparative analysis.
From:http://www.vstarcam.com/channel/Intelligent-video-analysis-capabilities-of-the-network-surveillance-camera-resolution-63.html
Plug Play IP Camera HD IP Camera Wireless IP Camera IP Camera Network camera manufacturer
Analog camera video surveillance system, seems to give the feeling of a kind of "integration", camera and sensor components are wrapped in a small space, if you want to try a different focal length of the camera, probably have to disassemble replacement; Network Camera lens and machine identity to leave, the focal length of the lens replacement is very convenient.
We say that the finished appearance of the core, network surveillance cameras have been able to support video analysis, the reason is an open platform. With the improved performance of the camera chip, there will be more chip resources are developed, so that more intelligent analysis of the IT elements embedded into the front-end equipment, but also allow more third-party video analysis software compatible to reach multiple intelligences options .
Simulation system is a closed structure-end equipment can not meet intelligent analysis function can only be transferred to the back-end storage systems DVR, DVR based on embedded Linux system the same as the open-source structure can be implanted in a different mode of analysis by video transmission to the front-end integration and analysis.
Comparison of front-end and back-end analysis
Network Camera support front-end intelligent analysis, simulation system for back-end analysis, one after the contrast has in theory be able to separate. The front-end the corresponding intelligent analysis, just need to analyze the results of treatment can spread to the back-end platform; while the back-end analysis requires that whole video image transmitted to the DVR, DVR resolution reached the platform, although the processing speed quickly, but can not help but still cause a certain time lag.
Perhaps in a small monitoring project, back-end intelligence analysis not qualify as a "disadvantage", but in the important financial sector or a wide range of monitoring, the meaning of race against time came to the fore.
Intelligent analysis of Network Cameras front support SD card storage
Turning to the pros and cons of problems, in fact, they are evenly divided. In the design, IPC smart front must support the front-end storage capabilities. Perhaps someone in the coursing, IPC supports SD card you can save the cost of the back-end storage. In fact, this view is wrong, SD card storage solutions supporting role: a network failure, the front-end alarm need to use SD card storage; its weakness is that is not conducive to a wide range of video management.
Front-end storage space is limited, so the codec requirements are very strict. I learned H.264 codec, Highprofile main application and network systems, most of the DVR recorders also using Mainprofile standards. The different decompression mode also reflects the final image generation effect.
The simulation system smart "rear to ensure the stability of the system, compared with the IP system intelligent front, emergencies lag does have an impact. Depending on the application different options for different trigger mode. Difficult to weigh the pros and cons of SD card storage can go long, whether analog cameras can be embedded intelligent modules in the future, these are still unknown.
The well-known network monitoring camera comes with intelligent analysis, video analysis of the front to the front-end equipment, faced with an emergency can be the first to respond to the alarm function. Network probes, analog cameras through the back-end DVR to determine whether the illegal invasion of behavior. In the difference between the two, I make a comparative analysis.
From:http://www.vstarcam.com/channel/Intelligent-video-analysis-capabilities-of-the-network-surveillance-camera-resolution-63.html
Plug Play IP Camera HD IP Camera Wireless IP Camera IP Camera Network camera manufacturer
HD IP Camera technology application and market trend analysis
HD IP Camera technology application and market trend analysis
A high-definition monitor demand and development
Accompanied by the depth of the safe city construction, for high-definition, the increasing demand for intelligent. Multimedia technology, combined with the gradual maturity of codec technology, network technology and IT technology, high-definition monitor began to combat application stage, high-definition IP camera has gradually become the front-end video capture products leader in the security industry.
Second, the standard definition network cameras and high-definition network camera introduction
Mainly two types of standard definition network cameras and high-definition network cameras, network cameras:
The SD Network Camera is the most common application of surveillance equipment, most of the standard definition network camera is on the basis of traditional analog cameras IP module, mainly to meet the quality requirements are not particularly high, but remote centralized monitoring can also facilitate the construction and installation and commissioning. Due to the price advantage, standard definition IP camera market demand accounted for a considerable part of the share, like computer local area network for regional monitoring sites, as well as via the Internet for cross-regional remote monitoring user to the standard definition network camera. But the shortcomings of the standard definition network camera is very prominent, the picture is fuzzy, low resolution, the incident scene details of the office is difficult to discern when sudden events need to be transferred to see the video playback, can not provide useful information.
At the same time, as the market demand for video surveillance quality to enhance the rapid development of high-definition network camera. Standard definition network cameras and traditional analog cameras are basically three or four hundred thousand pixels or lower, the latest program's analog products are also more than half a million pixels, the low pixel camera products can not fully meet the needs of most customers .
In recent years, the construction of the Green City HD possession ratio significantly improved, especially in the Pearl River Delta and Yangtze River Delta and other economically developed area safe city construction projects, the demand for high-definition products on the network more strongly. In some large-scale projects on the customer requirements every three to four monitoring points must be installed on a high-definition network camera, a high-traffic special places must also be installed high-definition network camera, we can see the entire industry demand has been relatively clear high-definition products .
HD IP Camera monitoring programs and benefits
HD IP Camera, image acquisition using the large size of the image sensor, the raw data collected through the ISP forming a video stream of the digital signal processing, digital video compression and network access module will be the digitized video signal is converted to match the network transport protocol (such as TCP / IP protocol) data stream, and sent to the internet transmission.
Advantages:
Network flexible, easy to implement
With the rapid development of network technologies and services, broadband networks are rapidly toward every corner of the town. Therefore, the high-definition network monitoring to quickly adapt to market demand, the maximum advantage of interoperability, remote monitoring, and flexible networking, and without dedicated to wiring will be able to easily and quickly be applied.
(2) low cost, the effect is significant
Compared with traditional analog surveillance equipment, high-definition network camera installation more convenient, at the same time the whole project will be a significant reduction in the cost of installation and construction. In addition, the network transmission is convenient surveillance video images can switch freely between sub-centers in the command center of the video monitoring or video surveillance, making the overall monitoring and management and monitoring efforts have been fully improved.
From:http://www.vstarcam.com/channel/HD-IP-Camera-technology-application-and-market-trend-analysis-62.html
Plug Play IP Camera HD IP Camera Wireless IP Camera IP Camera Network camera manufacturer
A high-definition monitor demand and development
Accompanied by the depth of the safe city construction, for high-definition, the increasing demand for intelligent. Multimedia technology, combined with the gradual maturity of codec technology, network technology and IT technology, high-definition monitor began to combat application stage, high-definition IP camera has gradually become the front-end video capture products leader in the security industry.
Second, the standard definition network cameras and high-definition network camera introduction
Mainly two types of standard definition network cameras and high-definition network cameras, network cameras:
The SD Network Camera is the most common application of surveillance equipment, most of the standard definition network camera is on the basis of traditional analog cameras IP module, mainly to meet the quality requirements are not particularly high, but remote centralized monitoring can also facilitate the construction and installation and commissioning. Due to the price advantage, standard definition IP camera market demand accounted for a considerable part of the share, like computer local area network for regional monitoring sites, as well as via the Internet for cross-regional remote monitoring user to the standard definition network camera. But the shortcomings of the standard definition network camera is very prominent, the picture is fuzzy, low resolution, the incident scene details of the office is difficult to discern when sudden events need to be transferred to see the video playback, can not provide useful information.
At the same time, as the market demand for video surveillance quality to enhance the rapid development of high-definition network camera. Standard definition network cameras and traditional analog cameras are basically three or four hundred thousand pixels or lower, the latest program's analog products are also more than half a million pixels, the low pixel camera products can not fully meet the needs of most customers .
In recent years, the construction of the Green City HD possession ratio significantly improved, especially in the Pearl River Delta and Yangtze River Delta and other economically developed area safe city construction projects, the demand for high-definition products on the network more strongly. In some large-scale projects on the customer requirements every three to four monitoring points must be installed on a high-definition network camera, a high-traffic special places must also be installed high-definition network camera, we can see the entire industry demand has been relatively clear high-definition products .
HD IP Camera monitoring programs and benefits
HD IP Camera, image acquisition using the large size of the image sensor, the raw data collected through the ISP forming a video stream of the digital signal processing, digital video compression and network access module will be the digitized video signal is converted to match the network transport protocol (such as TCP / IP protocol) data stream, and sent to the internet transmission.
Advantages:
Network flexible, easy to implement
With the rapid development of network technologies and services, broadband networks are rapidly toward every corner of the town. Therefore, the high-definition network monitoring to quickly adapt to market demand, the maximum advantage of interoperability, remote monitoring, and flexible networking, and without dedicated to wiring will be able to easily and quickly be applied.
(2) low cost, the effect is significant
Compared with traditional analog surveillance equipment, high-definition network camera installation more convenient, at the same time the whole project will be a significant reduction in the cost of installation and construction. In addition, the network transmission is convenient surveillance video images can switch freely between sub-centers in the command center of the video monitoring or video surveillance, making the overall monitoring and management and monitoring efforts have been fully improved.
From:http://www.vstarcam.com/channel/HD-IP-Camera-technology-application-and-market-trend-analysis-62.html
Plug Play IP Camera HD IP Camera Wireless IP Camera IP Camera Network camera manufacturer
Ten advantages of Wireless IP Camera
Ten advantages of Wireless IP Camera
As the most professional network camera manufacturers - Shenzhen Vstarcam Technology Co., Ltd., to solve the many problems of weak engineering wiring, the introduction of a new generation of Wireless IP Camera, favored by the users.
Vstarcam, as the dot-com Wireless IP Camera in the free band 2.4GHz, using orthogonal frequency division multiplexing FM technology and Direct Sequence Spread Spectrum technology, high-speed access point-to-point, point-to-multipoint data transfer rates up to 150Mbps.
Vstarcam as the dot-com Wireless IP Camera series features:
Distance - wireless communication distance up to 50km; complex environment to meet the wireless video transmission distance up to 1 km;
2, feature-rich - bridges and routers; the outdoor remote bridge and Wi-Fi base station function; support point-to-point, point-to-multipoint wireless WDS network function;
3, the high quality of the link - the latest technology and optimized AAP 802.11 to provide technical support for its high-speed, long-range, stable wireless link;
4, anti-interference ability - the channel width adjustable (5M/10M/20M); automatically adapt to the length of the packet; adaptive modulation types: CCK / BPSK / QAM (OFDM); the enhanced 802.11 protocol mechanisms (EMWA) - improve the multi-point communication efficiency; support the 2.3G band, effectively avoid interference.
, Cost-effective - Viagra, as the dot-com Wireless IP Camera is the most cost-competitive long-distance Wireless IP Camera; greatly eliminates the need for the cost and wiring of the AP.
6, high temperature environmental resistance - Operating Temperature: -20 ° C to +70 ° C;
7, high effective bandwidth - the maximum data throughput TCP / IP: 45Mbps;
8, installation is simple - Chinese debugging interface, provides detailed access information; equipment surface comes with a small tool, easy to adjust the antenna direction in the long-distance communications;
9, the device is compatible with interoperability - compatible with all 802.11b/g/n terminal.
10 security mechanism - MAC address filtering, 128-bit WEP/WPA/WPA2 / Layer 2 isolation;
Our Wireless IP Camera there are so many advanced features, Viagra, as the dot-com Wireless IP Camera, wireless network video surveillance choice.
From:http://www.vstarcam.com/channel/Ten-advantages-of-Wireless-IP-Camera-61.html
Plug Play IP Camera HD IP Camera Wireless IP Camera IP Camera Network camera manufacturer
As the most professional network camera manufacturers - Shenzhen Vstarcam Technology Co., Ltd., to solve the many problems of weak engineering wiring, the introduction of a new generation of Wireless IP Camera, favored by the users.
Vstarcam, as the dot-com Wireless IP Camera in the free band 2.4GHz, using orthogonal frequency division multiplexing FM technology and Direct Sequence Spread Spectrum technology, high-speed access point-to-point, point-to-multipoint data transfer rates up to 150Mbps.
Vstarcam as the dot-com Wireless IP Camera series features:
Distance - wireless communication distance up to 50km; complex environment to meet the wireless video transmission distance up to 1 km;
2, feature-rich - bridges and routers; the outdoor remote bridge and Wi-Fi base station function; support point-to-point, point-to-multipoint wireless WDS network function;
3, the high quality of the link - the latest technology and optimized AAP 802.11 to provide technical support for its high-speed, long-range, stable wireless link;
4, anti-interference ability - the channel width adjustable (5M/10M/20M); automatically adapt to the length of the packet; adaptive modulation types: CCK / BPSK / QAM (OFDM); the enhanced 802.11 protocol mechanisms (EMWA) - improve the multi-point communication efficiency; support the 2.3G band, effectively avoid interference.
, Cost-effective - Viagra, as the dot-com Wireless IP Camera is the most cost-competitive long-distance Wireless IP Camera; greatly eliminates the need for the cost and wiring of the AP.
6, high temperature environmental resistance - Operating Temperature: -20 ° C to +70 ° C;
7, high effective bandwidth - the maximum data throughput TCP / IP: 45Mbps;
8, installation is simple - Chinese debugging interface, provides detailed access information; equipment surface comes with a small tool, easy to adjust the antenna direction in the long-distance communications;
9, the device is compatible with interoperability - compatible with all 802.11b/g/n terminal.
10 security mechanism - MAC address filtering, 128-bit WEP/WPA/WPA2 / Layer 2 isolation;
Our Wireless IP Camera there are so many advanced features, Viagra, as the dot-com Wireless IP Camera, wireless network video surveillance choice.
From:http://www.vstarcam.com/channel/Ten-advantages-of-Wireless-IP-Camera-61.html
Plug Play IP Camera HD IP Camera Wireless IP Camera IP Camera Network camera manufacturer
Brief Analysis of key technology of HD IP Camera
Brief Analysis of key technology of HD IP Camera
HD network camera usually its resolution is the number of pixels of different but with different specifications and classification, in practical applications, depending on the needs of the environment, the product characteristics also have different requirements, so in addition to many mega pixels exceptionally, in accordance with the main features of the classification of the other, if applicable, the shading varied scenes wide dynamic camera, suitable for low-light cameras in low-light environments, suitable for special high-risk active early warning surveillance applications Intelligent Video Analysis camera and so on.
An image sensor
HD network camera as a camera, you must have the camera key technology areas, such as sensors (Sensor technology). Sensor link as the most distal end of the optical signal is converted into an electrical signal, the key technology is most directly affect the image quality of the camera. HD network camera, this is no exception, and the sensor has applications in high-definition network camera on the specific requirements need to be able to meet the high-definition image uptake required a large amount of data processing capabilities, as well as required to meet the high-definition large-format image large the target surface, which gave the high-definition IP camera sensor technology, which brings the cost pressures and technical challenges.
Sensor types of commonly used both CCD and CMOS analog cameras common CCD sensor, but to the high-definition era, we can find the application of the CCD is very small, if 720P-level HD camcorder can see CCD, 1080P-level HD camcorder, almost all of CMOS products. Most HD cameras are based CMOS sensor is very simple, high-definition large amount of data processing power CMOS has the absolute advantage, while CCD meet the the HD application of a substantial increase in manufacturing costs, the key benefit from CMOS technology in recent years leaps and bounds, previously limited low-light video effects, wide dynamic problems can be solved gradually, etc., coupled with the CMOS inherent cost advantages make it to occupy the mainstream position in the field of HD IP Camera.
Video compression algorithm
Another key technical aspects of the HD IP Camera is the video compression algorithm, video images transmitted by the network after digital compression This is the most basic functions of the network cameras, video compression algorithm is better than the poor directly determines the quality of the video image. Can be viewed from two perspectives, on the one hand, a good video compression algorithm, you can minimize the distortion of the picture, it is well known video compression are lossy compression used in network transmission, information on the screen is bound to lose, so necessary maximum in the case of compression ratio to meet the retained most of the information on the screen; case the other hand, video compression algorithm, and can provide a better picture of the effect, using a lower bitrate means occupy more low bandwidth and less storage space.
Mainstream applications of video compression algorithm for H.264 standard, H.264 defines four different profile (class / level) Baseline (Baseline), Main (class), Extended (extended class) and High Profile (high profile), the higher the level of the same quality the smaller the bit rate, the greater the intensity calculation. With the growing demand of high-definition applications, video compression algorithm upgrade footsteps did not stop, the upcoming H.264 standard is widely used at the same time, the H.265 standard. June 25, 2012, the International Telecommunication Union (ITU) announced on its official website a work plan for the project, originally scheduled for 2008-2010, "High efficiency video coding" (HEVC, or H.265) standards are expected was launched in January 2013. H.265 algorithm standard video compression efficiency than H.264 doubling that guarantee the same video image quality under the premise of the video stream bit rate reduction of 50% can be achieved to 2Mbps transmission speed transmission 720P, a The saving of the network bandwidth, the other to save video storage space, application greatly reduces the cost of the high-definition camera.
The launch of the H.265 standard will give the development of HD IP Camera and even high-definition surveillance market would do things differently, remains to be seen, I believe that the short-term or will not change much, the key depends on the degree of follow-up of the chip maker, everything goes according to plan road, H.265 brought the change in the earliest by the end of 2013 or even 2014 to see.
Wide dynamic
In addition, to meet a variety of application scenarios and high-definition monitor building programs, where the key features of a wide dynamic is also a HD IP Camera. A lot of applications are backlit scene contrasty larger area, if it is to look at the light and in the dark, you need a camera with wide dynamic effect, in order to ensure that is too bright and too dark at all be able to see
Initiative to enhance video
The effective combination of the stream and the picture quality is also key. HD video requires high bit rate, bit rate reduction to mean sacrificing picture quality, in order to high quality picture, you need a higher bit rate. So is there a way that can guarantee the bit rate is not increased, to ensure that key picture quality, the answer is yes. The VAE (video Active Enhancement) video initiative enhanced, allowing different regions of the video screen to enjoy quality encoding treatment, perhaps only part of the so-called good steel should be used wisely, the whole lot of the video screen we focus on the region, that we let the limited video coding resources focus in this part of the region, focused on enhancing the clarity of the region of interest, due to lower non-key areas clarity, improved target definition, without increasing the network load can be described as a win-win.
Three-stream
With the increasing demand of mobile monitoring, the limited bandwidth resources of the high-definition IP Camera with high-definition video and high-bit rate mobile monitoring the formation of a contradiction, it was proposed to use dual-stream, yes, but here dual-stream can no longer meet needs, the overall high-definition monitor solve the program, the HD IP Camera must bear all the way to high-definition video for video storage, while providing a signpost definition video for remote monitoring, this dual-stream, on this basis, the high-definition camera must support three yards stream third way stream dedicated to mobile monitoring can be lower resolution and bit-rate video monitor required to meet the needs of mobile phones and mobile devices, three stream is complete HD overall solution must have
Smart technology
HD network camera brings high-definition video quality, video surveillance into the HD era, but did not change the traditional passive monitoring mode. High-definition image of the site can make monitoring more clearly, but can not change many key observation of the monitoring site, easy to miss a passive state. And then clear the screen, if not alarm occurs when the first time to monitor staff see its effective value will be greatly reduced. Therefore, the combination of HD and intelligence is the most effective weapon, the use of intelligent video analysis, early warning effect, the first time there will be police intelligence, high-definition screen pop, will greatly enhance the efficiency of its monitoring.
In the era of traditional analog cameras monitoring camera itself does not have video processing DSP chip can not be intelligent video analysis algorithms embedded into the camera, in order to achieve the intelligent monitoring, additional intelligent video analysis equipment, cost and maintenance effort are larger. The emergence of HD IP Camera has its own video processing DSP chip, so you can achieve the intelligent video analysis algorithm is embedded into the high-definition camera. On the one hand can be intelligent video analysis technology applications in high-definition screen, to ensure the accuracy of the intelligence analysis, the more traditional image of the SD or lower resolution intelligent analysis in terms of accuracy enhance large conceivable; On the other hand reduces the need to of additional intelligent analysis equipment costs, reducing the overall cost of the monitoring program.
Epilogue
HD network camera is facing many problems to be solved, such as the pressure of high bit-rate bandwidth, storage pressure, high-definition lens in the actual project selection and cost issues. At present, the application of HD IP Camera is still in its early stages, many problems with the technology continues to evolve, gradually crack, high-definition monitor becomes easier, HD IP Camera market will quickly zoom.
From:http://www.vstarcam.com/channel/Brief-Analysis-of-key-technology-of-HD-IP-Camera-60.html
HD network camera usually its resolution is the number of pixels of different but with different specifications and classification, in practical applications, depending on the needs of the environment, the product characteristics also have different requirements, so in addition to many mega pixels exceptionally, in accordance with the main features of the classification of the other, if applicable, the shading varied scenes wide dynamic camera, suitable for low-light cameras in low-light environments, suitable for special high-risk active early warning surveillance applications Intelligent Video Analysis camera and so on.
An image sensor
HD network camera as a camera, you must have the camera key technology areas, such as sensors (Sensor technology). Sensor link as the most distal end of the optical signal is converted into an electrical signal, the key technology is most directly affect the image quality of the camera. HD network camera, this is no exception, and the sensor has applications in high-definition network camera on the specific requirements need to be able to meet the high-definition image uptake required a large amount of data processing capabilities, as well as required to meet the high-definition large-format image large the target surface, which gave the high-definition IP camera sensor technology, which brings the cost pressures and technical challenges.
Sensor types of commonly used both CCD and CMOS analog cameras common CCD sensor, but to the high-definition era, we can find the application of the CCD is very small, if 720P-level HD camcorder can see CCD, 1080P-level HD camcorder, almost all of CMOS products. Most HD cameras are based CMOS sensor is very simple, high-definition large amount of data processing power CMOS has the absolute advantage, while CCD meet the the HD application of a substantial increase in manufacturing costs, the key benefit from CMOS technology in recent years leaps and bounds, previously limited low-light video effects, wide dynamic problems can be solved gradually, etc., coupled with the CMOS inherent cost advantages make it to occupy the mainstream position in the field of HD IP Camera.
Video compression algorithm
Another key technical aspects of the HD IP Camera is the video compression algorithm, video images transmitted by the network after digital compression This is the most basic functions of the network cameras, video compression algorithm is better than the poor directly determines the quality of the video image. Can be viewed from two perspectives, on the one hand, a good video compression algorithm, you can minimize the distortion of the picture, it is well known video compression are lossy compression used in network transmission, information on the screen is bound to lose, so necessary maximum in the case of compression ratio to meet the retained most of the information on the screen; case the other hand, video compression algorithm, and can provide a better picture of the effect, using a lower bitrate means occupy more low bandwidth and less storage space.
Mainstream applications of video compression algorithm for H.264 standard, H.264 defines four different profile (class / level) Baseline (Baseline), Main (class), Extended (extended class) and High Profile (high profile), the higher the level of the same quality the smaller the bit rate, the greater the intensity calculation. With the growing demand of high-definition applications, video compression algorithm upgrade footsteps did not stop, the upcoming H.264 standard is widely used at the same time, the H.265 standard. June 25, 2012, the International Telecommunication Union (ITU) announced on its official website a work plan for the project, originally scheduled for 2008-2010, "High efficiency video coding" (HEVC, or H.265) standards are expected was launched in January 2013. H.265 algorithm standard video compression efficiency than H.264 doubling that guarantee the same video image quality under the premise of the video stream bit rate reduction of 50% can be achieved to 2Mbps transmission speed transmission 720P, a The saving of the network bandwidth, the other to save video storage space, application greatly reduces the cost of the high-definition camera.
The launch of the H.265 standard will give the development of HD IP Camera and even high-definition surveillance market would do things differently, remains to be seen, I believe that the short-term or will not change much, the key depends on the degree of follow-up of the chip maker, everything goes according to plan road, H.265 brought the change in the earliest by the end of 2013 or even 2014 to see.
Wide dynamic
In addition, to meet a variety of application scenarios and high-definition monitor building programs, where the key features of a wide dynamic is also a HD IP Camera. A lot of applications are backlit scene contrasty larger area, if it is to look at the light and in the dark, you need a camera with wide dynamic effect, in order to ensure that is too bright and too dark at all be able to see
Initiative to enhance video
The effective combination of the stream and the picture quality is also key. HD video requires high bit rate, bit rate reduction to mean sacrificing picture quality, in order to high quality picture, you need a higher bit rate. So is there a way that can guarantee the bit rate is not increased, to ensure that key picture quality, the answer is yes. The VAE (video Active Enhancement) video initiative enhanced, allowing different regions of the video screen to enjoy quality encoding treatment, perhaps only part of the so-called good steel should be used wisely, the whole lot of the video screen we focus on the region, that we let the limited video coding resources focus in this part of the region, focused on enhancing the clarity of the region of interest, due to lower non-key areas clarity, improved target definition, without increasing the network load can be described as a win-win.
Three-stream
With the increasing demand of mobile monitoring, the limited bandwidth resources of the high-definition IP Camera with high-definition video and high-bit rate mobile monitoring the formation of a contradiction, it was proposed to use dual-stream, yes, but here dual-stream can no longer meet needs, the overall high-definition monitor solve the program, the HD IP Camera must bear all the way to high-definition video for video storage, while providing a signpost definition video for remote monitoring, this dual-stream, on this basis, the high-definition camera must support three yards stream third way stream dedicated to mobile monitoring can be lower resolution and bit-rate video monitor required to meet the needs of mobile phones and mobile devices, three stream is complete HD overall solution must have
Smart technology
HD network camera brings high-definition video quality, video surveillance into the HD era, but did not change the traditional passive monitoring mode. High-definition image of the site can make monitoring more clearly, but can not change many key observation of the monitoring site, easy to miss a passive state. And then clear the screen, if not alarm occurs when the first time to monitor staff see its effective value will be greatly reduced. Therefore, the combination of HD and intelligence is the most effective weapon, the use of intelligent video analysis, early warning effect, the first time there will be police intelligence, high-definition screen pop, will greatly enhance the efficiency of its monitoring.
In the era of traditional analog cameras monitoring camera itself does not have video processing DSP chip can not be intelligent video analysis algorithms embedded into the camera, in order to achieve the intelligent monitoring, additional intelligent video analysis equipment, cost and maintenance effort are larger. The emergence of HD IP Camera has its own video processing DSP chip, so you can achieve the intelligent video analysis algorithm is embedded into the high-definition camera. On the one hand can be intelligent video analysis technology applications in high-definition screen, to ensure the accuracy of the intelligence analysis, the more traditional image of the SD or lower resolution intelligent analysis in terms of accuracy enhance large conceivable; On the other hand reduces the need to of additional intelligent analysis equipment costs, reducing the overall cost of the monitoring program.
Epilogue
HD network camera is facing many problems to be solved, such as the pressure of high bit-rate bandwidth, storage pressure, high-definition lens in the actual project selection and cost issues. At present, the application of HD IP Camera is still in its early stages, many problems with the technology continues to evolve, gradually crack, high-definition monitor becomes easier, HD IP Camera market will quickly zoom.
From:http://www.vstarcam.com/channel/Brief-Analysis-of-key-technology-of-HD-IP-Camera-60.html
2013年4月22日星期一
Global IP Camera surveillance market to the development of high-definition
Global IP Camera surveillance market to the development of high-definition
According IMSResearch security monitoring market forecast, this year's global IP Camera video surveillance market value will exceed 2012 $ 5.4 billion, accounting for nearly 40% of the entire video surveillance market. With the increasing competition in the surveillance market, the manufacturers on the one hand to explore what is the mainstream HD IP Camera, on the other hand, in accordance with the difference in the field of promotion, strengthening functional changes, good after-sales and warranty services.
This year, the the mainstream network control camera 2 million pixels. Judging from the monitor display device, even a surveillance camera is able to capture higher quality than 2 million pixels, the entire image can not be reflected on the display, so 2 million is the top for control and display technology with.
Network monitoring fully upgraded 2-megapixel camera pursuit
When high pixel aimless, the manufacturers do not seem as. These pixels are not used to improve the quality, but turned to other functions. In fact, the higher the image resolution is lower sensitivity. Security applications, it is easy to lose sight of this, especially in low-light environments. The same time, in order to obtain higher resolution images, the image data space occupied by the greater, thus creating the problem of network bandwidth and storage, the final integrated construction and implementation of the higher costs.
Sensitivity and network bandwidth
The image sensor determines the megapixels quality of the monitoring camera, most sensors an aspect ratio of 4:3, but in order to accommodate more pixels, Sony uses a 16:9 image sensor, each pixel is larger, directly improve the image resolution, and sensitivity are increasing.
Surveillance cameras internal structure
Quality generated for the front of the Network Camera addition to rely sensor, the network bandwidth is also very important. In a monitoring system, how to more effectively control the bandwidth allocation can not only save storage space, the image quality will not be affected. In a variety of network monitoring solution, it was suggested to use the SVC video data into different levels of resolution, which effectively alleviate the pressure on bandwidth and processor resources; In response to this demand, you can adjust the image size and frame rate, to meet the affordability of the equipment of different customers under different network environments.
Multi-stream video compression
Multi-stream means that the monitoring system to allow the different types of video compression formats, such as H.264 or M-JPEG data stream transmitted through the network bandwidth. Stream depends on the infrared IP Camera processor, some manufacturers use the core stream to control the gap between La and other enterprises, the codec also may cause the front-end and back-end product is not compatible.
Most manufacturers of surveillance cameras to provide at least two stream, the stream is divided into the main stream and the sub-stream, and select the type of the code stream according to the type of monitoring purposes. Under normal circumstances, the computer monitor needs camera main stream, according to the resolution of the display to provide a sufficiently clear video images; mobile phone monitoring select sub-stream, one save bandwidth is mobile remote monitoring does not require too high a clear image degrees.
The Network Camera stream size of the impact on the quality
HD stream control and management functions allows users to transfer and storage stage-managed images without losing any signal affecting the image quality. Another big advantage of this function is to control terminal can be an important quality Return to the command center, thus easing the pressure of the bandwidth and greatly reduce the processing load of the remote client.
Surveillance cameras in special circumstances
In order to broaden the field of video surveillance applications, businesses have been offering for the industry's products, such as commercial buildings, education, traffic monitoring, safe city, the airport and the financial HD images require a higher monitoring equipment. For different applications, the camera must also designed to meet the stringent conditions.
Some surveillance cameras used for oil and gas, coal mining or pipeline construction, can withstand high temperatures and harsh environmental challenges. This requires that surveillance cameras have sufficient temperature capability, while ensuring reliable monitoring performance. Surveillance cameras directly exposed to sunlight, the temperature in the normal working hours to improve 15 ° C, so when working at normal outdoor temperature 45 ° C, inside the Network Camera is likely to reach 60 ° C. Surveillance cameras used in desert areas, the interior must be equipped with a temperature condensation system, in order to protect the normal working of the device in the non-high temperatures. With the rapid development of urban transport, domestic security companies vision aimed traffic monitoring. Identity Module offers a variety of road monitoring and fast image capture technology, in order to monitor the traffic situation to ease urban congestion pressure.
Monitoring applications in extreme environments
Megapixels surveillance cameras industry opportunities, or the manufacturer changes of service and solutions, its purpose is to reduce labor costs, monitoring solve the various problems encountered in life. Domestic surveillance market has not yet fully expanded, there are also a lot of pressure for security companies. -Definition IP Camera surveillance market in addition to changing the image quality, supporting the function of the camera also will be upgraded. Multi-stream control effectively reduce the bandwidth pressure; 16:9 sensors for megapixel cameras exceeded 2 million effective pixels; monitoring inside the Network Camera can also install air condensing unit in harsh environments, ... all this change that this network monitoring powerful expansion and the pursuit of high-definition images
wireless camera IR IP Camera HD Camcorder ipcam Wired IP Camera Consumption IP Camera POE IP Camera Plug Play IP Camera HD IP Camera Wireless IP Camera IP Camera Network camera manufacturer
According IMSResearch security monitoring market forecast, this year's global IP Camera video surveillance market value will exceed 2012 $ 5.4 billion, accounting for nearly 40% of the entire video surveillance market. With the increasing competition in the surveillance market, the manufacturers on the one hand to explore what is the mainstream HD IP Camera, on the other hand, in accordance with the difference in the field of promotion, strengthening functional changes, good after-sales and warranty services.
This year, the the mainstream network control camera 2 million pixels. Judging from the monitor display device, even a surveillance camera is able to capture higher quality than 2 million pixels, the entire image can not be reflected on the display, so 2 million is the top for control and display technology with.
Network monitoring fully upgraded 2-megapixel camera pursuit
When high pixel aimless, the manufacturers do not seem as. These pixels are not used to improve the quality, but turned to other functions. In fact, the higher the image resolution is lower sensitivity. Security applications, it is easy to lose sight of this, especially in low-light environments. The same time, in order to obtain higher resolution images, the image data space occupied by the greater, thus creating the problem of network bandwidth and storage, the final integrated construction and implementation of the higher costs.
Sensitivity and network bandwidth
The image sensor determines the megapixels quality of the monitoring camera, most sensors an aspect ratio of 4:3, but in order to accommodate more pixels, Sony uses a 16:9 image sensor, each pixel is larger, directly improve the image resolution, and sensitivity are increasing.
Surveillance cameras internal structure
Quality generated for the front of the Network Camera addition to rely sensor, the network bandwidth is also very important. In a monitoring system, how to more effectively control the bandwidth allocation can not only save storage space, the image quality will not be affected. In a variety of network monitoring solution, it was suggested to use the SVC video data into different levels of resolution, which effectively alleviate the pressure on bandwidth and processor resources; In response to this demand, you can adjust the image size and frame rate, to meet the affordability of the equipment of different customers under different network environments.
Multi-stream video compression
Multi-stream means that the monitoring system to allow the different types of video compression formats, such as H.264 or M-JPEG data stream transmitted through the network bandwidth. Stream depends on the infrared IP Camera processor, some manufacturers use the core stream to control the gap between La and other enterprises, the codec also may cause the front-end and back-end product is not compatible.
Most manufacturers of surveillance cameras to provide at least two stream, the stream is divided into the main stream and the sub-stream, and select the type of the code stream according to the type of monitoring purposes. Under normal circumstances, the computer monitor needs camera main stream, according to the resolution of the display to provide a sufficiently clear video images; mobile phone monitoring select sub-stream, one save bandwidth is mobile remote monitoring does not require too high a clear image degrees.
The Network Camera stream size of the impact on the quality
HD stream control and management functions allows users to transfer and storage stage-managed images without losing any signal affecting the image quality. Another big advantage of this function is to control terminal can be an important quality Return to the command center, thus easing the pressure of the bandwidth and greatly reduce the processing load of the remote client.
Surveillance cameras in special circumstances
In order to broaden the field of video surveillance applications, businesses have been offering for the industry's products, such as commercial buildings, education, traffic monitoring, safe city, the airport and the financial HD images require a higher monitoring equipment. For different applications, the camera must also designed to meet the stringent conditions.
Some surveillance cameras used for oil and gas, coal mining or pipeline construction, can withstand high temperatures and harsh environmental challenges. This requires that surveillance cameras have sufficient temperature capability, while ensuring reliable monitoring performance. Surveillance cameras directly exposed to sunlight, the temperature in the normal working hours to improve 15 ° C, so when working at normal outdoor temperature 45 ° C, inside the Network Camera is likely to reach 60 ° C. Surveillance cameras used in desert areas, the interior must be equipped with a temperature condensation system, in order to protect the normal working of the device in the non-high temperatures. With the rapid development of urban transport, domestic security companies vision aimed traffic monitoring. Identity Module offers a variety of road monitoring and fast image capture technology, in order to monitor the traffic situation to ease urban congestion pressure.
Monitoring applications in extreme environments
Megapixels surveillance cameras industry opportunities, or the manufacturer changes of service and solutions, its purpose is to reduce labor costs, monitoring solve the various problems encountered in life. Domestic surveillance market has not yet fully expanded, there are also a lot of pressure for security companies. -Definition IP Camera surveillance market in addition to changing the image quality, supporting the function of the camera also will be upgraded. Multi-stream control effectively reduce the bandwidth pressure; 16:9 sensors for megapixel cameras exceeded 2 million effective pixels; monitoring inside the Network Camera can also install air condensing unit in harsh environments, ... all this change that this network monitoring powerful expansion and the pursuit of high-definition images
wireless camera IR IP Camera HD Camcorder ipcam Wired IP Camera Consumption IP Camera POE IP Camera Plug Play IP Camera HD IP Camera Wireless IP Camera IP Camera Network camera manufacturer
HD IP Camera in the campus management
HD IP Camera in the campus management
Network video surveillance is different from analog video surveillance, through wired or wireless network to the Network Camera captured video signal to digital form for transmission and monitoring system can be used with many other types of security systems, such as intrusion alarm system, access control systems, etc carried out the perfect combination.
Network Video Monitoring System:
Network video surveillance is different from analog video surveillance, through wired or wireless network to the Network Camera captured video signal to digital form for transmission and monitoring system can be used with many other types of security systems, such as intrusion alarm systems, access control systems, such as the perfect combination.
The IP Network Camera is a combination of traditional cameras and network technology to produce a new generation camera. It will be collected directly by the built-in chip video signals to digital compression, and sent to the back-end server through the network interface, users can watch video image management software via IE browser or directly on the camera for remote management and configuration operation.
As early as in 1996 had already appear the first branched of Network Cameras, but was limited by the At that time of the network bandwidth, IP Cameras has been difficult to to popularity of the. With the improvement of network bandwidth and network technology has become more sophisticated, Network Cameras toward the economy, intelligence and development of high-definition, and the benefits of the Internet, combined with advanced audio and video compression algorithm, so that users can see far through the network in real time end of the clear picture of.
Compared with traditional analog video surveillance systems, network video surveillance system in terms of video compression, transmission, storage, analysis, display and automated processing, has a great advantage: network video surveillance system through the network platform to achieve long-distance transmission, data analysis of large-scale management and mass in front of the camera, can be achieved through the intelligent management software to automate unattended; with massive network storage technology, as well as high-definition screen even thousands of kilometers away can control freely; monitors, network video surveillance system video surveillance to a new level, so that "a thousand miles".
HD IP Camera：
The HD IP Camera is to refers to the be able to be press the is greater than 12FPS continuous acquisition the Maximum resolution is greater than 720P (1280 × 720), or reached 1080P (1920 × 1080) or even higher resolution the of the Network Camera of the screen. HD IP Camera with high resolution chip, you can shoot high-quality, high-resolution images, a new product of the technological age.
HD IP Camera is a source of high-quality imaging monitoring, digital video capture, HD encoding compression and IP encapsulation, IP network to achieve high-definition real-time monitoring, video storage, playback and forwarding. The general resolution up to 1280 × 720,1280 × 1024,1392 × 1024,1628 × 1236,1920 × 1080,2048 × 1536 or even higher 2560 × 1920, which we usually refer megapixels to 5 million pixel high-definition years.
Thanks to the popularity of Gigabit network, mass storage technology and high-definition display technology, high-definition IP Camera is more and more widely - both transportation, urban security monitoring, military, airport, subway, financial security with special requirements of the premises and areas at the same time meet the examination room monitoring, distance learning, medical video education, environmental monitoring and remote insurance loss the specific needs of the occasion. With the gradual decline in the cost of the video image quality demand high-growth, high-definition Network Camera will be large-scale selection.
From:http://www.vstarcam.com/channel/HD-IP-Camera-in-the-campus-management-59.html
Plug Play IP Camera HD IP Camera Wireless IP Camera IP Camera Network camera manufacturer
From:http://www.vstarcam.com/channel/IP-HD-network-camera-technology-application-characteristics-58.html
Network video surveillance is different from analog video surveillance, through wired or wireless network to the Network Camera captured video signal to digital form for transmission and monitoring system can be used with many other types of security systems, such as intrusion alarm system, access control systems, etc carried out the perfect combination.
Network Video Monitoring System:
Network video surveillance is different from analog video surveillance, through wired or wireless network to the Network Camera captured video signal to digital form for transmission and monitoring system can be used with many other types of security systems, such as intrusion alarm systems, access control systems, such as the perfect combination.
The IP Network Camera is a combination of traditional cameras and network technology to produce a new generation camera. It will be collected directly by the built-in chip video signals to digital compression, and sent to the back-end server through the network interface, users can watch video image management software via IE browser or directly on the camera for remote management and configuration operation.
As early as in 1996 had already appear the first branched of Network Cameras, but was limited by the At that time of the network bandwidth, IP Cameras has been difficult to to popularity of the. With the improvement of network bandwidth and network technology has become more sophisticated, Network Cameras toward the economy, intelligence and development of high-definition, and the benefits of the Internet, combined with advanced audio and video compression algorithm, so that users can see far through the network in real time end of the clear picture of.
Compared with traditional analog video surveillance systems, network video surveillance system in terms of video compression, transmission, storage, analysis, display and automated processing, has a great advantage: network video surveillance system through the network platform to achieve long-distance transmission, data analysis of large-scale management and mass in front of the camera, can be achieved through the intelligent management software to automate unattended; with massive network storage technology, as well as high-definition screen even thousands of kilometers away can control freely; monitors, network video surveillance system video surveillance to a new level, so that "a thousand miles".
HD IP Camera：
The HD IP Camera is to refers to the be able to be press the is greater than 12FPS continuous acquisition the Maximum resolution is greater than 720P (1280 × 720), or reached 1080P (1920 × 1080) or even higher resolution the of the Network Camera of the screen. HD IP Camera with high resolution chip, you can shoot high-quality, high-resolution images, a new product of the technological age.
HD IP Camera is a source of high-quality imaging monitoring, digital video capture, HD encoding compression and IP encapsulation, IP network to achieve high-definition real-time monitoring, video storage, playback and forwarding. The general resolution up to 1280 × 720,1280 × 1024,1392 × 1024,1628 × 1236,1920 × 1080,2048 × 1536 or even higher 2560 × 1920, which we usually refer megapixels to 5 million pixel high-definition years.
Thanks to the popularity of Gigabit network, mass storage technology and high-definition display technology, high-definition IP Camera is more and more widely - both transportation, urban security monitoring, military, airport, subway, financial security with special requirements of the premises and areas at the same time meet the examination room monitoring, distance learning, medical video education, environmental monitoring and remote insurance loss the specific needs of the occasion. With the gradual decline in the cost of the video image quality demand high-growth, high-definition Network Camera will be large-scale selection.
From:http://www.vstarcam.com/channel/HD-IP-Camera-in-the-campus-management-59.html
Plug Play IP Camera HD IP Camera Wireless IP Camera IP Camera Network camera manufacturer
From:http://www.vstarcam.com/channel/IP-HD-network-camera-technology-application-characteristics-58.html
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