Megapixel network cameras to explore the actual situation
Q: Why is the market Megapixel infrared machines are rare ?
Answer : Millions of HD has been for many years the concept of indoctrination, whether in security exhibitions, magazines or the media are filled with various brands of one million high-definition network camera , but independent research and development and the ability to bulk sales of one million high-definition brand , but few, but can the IR Megapixel manufacturers is less. Many companies from here to buy development board solution providers and programs can be easily mistaken developed marketable products , not knowing , digital camera auto-focus , color correction, network transmission, illumination and so need to improve their own development, solution providers only provide a preliminary semi . Just out of the picture , a lot of development work required to complete their own , so the failure rate is very high. If the manufacturer even the common Megapixel IP Camera are not successfully launched , not to mention the million infrared machines . Megapixel IR dryer, solution providers did not plan , you need to develop and control their own color ( do not sense infrared ) and black and white ( sense infrared ) switching software .
Q: How many Megapixel domestic manufacturers ?
A: According to the semiconductor company statistics, the domestic participation in research and development Megapixel network camera manufacturers as many as one hundred or more, TI's DaVinci DM3XX series with American APTINA company 9P031 for the combination of solutions , there are hundreds of companies , total domestic purchased this program and the development board . But in 2012 , the vast majority in 3A technology, large amounts of data network transmission technology point stumble , only a very few successfully developed and marketed , in which intelligence is the only one to achieve a fully autonomous technology developed 3A manufacturers will eventually Megapixel cameras one by one break of the key technologies , TI and APTINA company become an important cooperation and support objects. In all types of security exhibition, although you can see that many manufacturers millions of high-definition display their products, but really all independent development and mass production of only two or three companies , semi- independent development and definition of the manufacturers can not sell one million to 5 .
Q: China has independently developed Megapixel high-speed ball?
A: In the analog era , the domestic high-speed ball movement , mostly Japanese and other imports , high-speed ball a key technical point is the auto-focus section, which functions are controlled by the chip to achieve, and as such, have no chance to develop their own domestic companies auto focus, so the domestic analog high-speed ball , had to be imported movement. And into the digital high-definition era, there are a few R & D strength of domestic enterprises, the part of the technology developed by the software running on ARM to achieve autofocus and intelligent control , thus breaking the Japanese and Korean semiconductor manufacturers and the lens or camera technical monopoly. In China, will become Megapixel Speed Dome important supplier .
Q : Millions of HD video recorder with DVR Embedded Embedded What is the relationship ?
A: They belong to the same video recorders, software technology and function in a very similar and interlinked nature , but only a few digital DVR manufacturers have the opportunity to shift to digital high-definition embedded video recorders , first of all, do one million high-definition video recorder, too you have to have independent R & D capability and competitive digital HD camcorders, cameras have advantages , and secondly, the technical difficulty million high-definition video recorder is much higher than embedded DVR, now approaching one million high-definition embedded video recorders do not plan to buy the finished product , independent research and development is a simple thing, and one million high-definition VGA resolution must be higher than 1024X768, usually mostly 1920X1080, VGA output resolution of such a large brand in embedded DVR is rare . Another Megapixel decompression requirements are high, because the high resolution , large amount of data , the integrity of the software technology has improved.
Q: Megapixel cameras are not just buy a set of programs became factory ?
A: buy a set of programs to become Megapixel IP camera manufacturers idea is impossible. First , the camera solution providers will usually photoreceptor current mainstream processor to make a camera with a semi , and then sold to the manufacturers want to develop one million high-definition , but due to solution providers themselves less contact with contractors , they can only develop some basic functions , and the rest need priced self-development . Second, once the chip was later introduced new photoreceptors , and not a direct replacement for the photoreceptor , which requires solution providers to re- write auto white balance , auto exposure and auto- focus software upgrade is very troublesome. Once again, the country has very few camera manufacturers 3A technology , coupled with the capture of the front camera , manufacturers also need to make the corresponding video , which will be the development of high-definition million threshold referred to new heights. Therefore, in million high-definition era, only with a strong R & D and the overall strength of the manufacturers.
From:http://www.vstarcam.com/channel/Megapixel-network-cameras-to-explore-the-actual-situation-336.html
2013年10月29日星期二
Megapixel network camera for engineering burdens
Megapixel network camera for engineering burdens
Q : Millions of high-definition monitor , you also need video capture card?
A: No , the digital Megapixel network camera network output is the result of MPEG-4 or H264 algorithms such as compressed digital video , video capture card is the main function of the analog signal into a digital signal , cross the DSP or CPU , etc. processor compression, so one million high-definition monitor , the backend does not require video capture card , do not need to compress .
Q: What is digital-analog hybrid DVR card ?
A: The digital-analog hybrid DVR card , that is not only connected to analog cameras , and also can accept digital HDIP Camera video signals, analog video into digital video and through high-definition digital video displayed on the same software interface to achieve a unified display , manage and playback functions. All current video capture card, has been fully upgraded to one million high-definition digital and analog hybrid DVR card, while prices remained unchanged.
Q: Megapixel IP camera analog cameras will encounter a similar electromagnetic interference troubles ?
A: No, one million high-definition digital video, digital compressed video output , the transmission process is not susceptible to electromagnetic interference , to overcome the conventional analog monitor vulnerable to interference troubles. Therefore, high-definition digital video camera screen cleaner million .
Q: Megapixel IP cameras over the network , as far as how many meters ?
A: The direct connection to the farthest is generally recommended as 150 meters , more than 150 meters , can be extended through the switch , and the switch can be a sliding scale , which extends to the longer distances , while distances of up to one thousand meters above , you can use optical switches ( fiber transceiver) extends . Since fiber optic transceivers than analog video transmission using Optical cheap, so millions of high-definition monitor cost savings .
Q: Megapixel IP Camera POE power supply if used , is reliable ?
A : POE power supply, is already a very mature technology, already on the market through long-term verification , it has to be investigated is not a new technology , so fundamental to worry about . POE power supply network , the voltage is 48V, reach the camera, turn the camera into the operating voltage .
From:http://www.vstarcam.com/channel/Megapixel-network-camera-for-engineering-burdens-335.html
Q : Millions of high-definition monitor , you also need video capture card?
A: No , the digital Megapixel network camera network output is the result of MPEG-4 or H264 algorithms such as compressed digital video , video capture card is the main function of the analog signal into a digital signal , cross the DSP or CPU , etc. processor compression, so one million high-definition monitor , the backend does not require video capture card , do not need to compress .
Q: What is digital-analog hybrid DVR card ?
A: The digital-analog hybrid DVR card , that is not only connected to analog cameras , and also can accept digital HDIP Camera video signals, analog video into digital video and through high-definition digital video displayed on the same software interface to achieve a unified display , manage and playback functions. All current video capture card, has been fully upgraded to one million high-definition digital and analog hybrid DVR card, while prices remained unchanged.
Q: Megapixel IP camera analog cameras will encounter a similar electromagnetic interference troubles ?
A: No, one million high-definition digital video, digital compressed video output , the transmission process is not susceptible to electromagnetic interference , to overcome the conventional analog monitor vulnerable to interference troubles. Therefore, high-definition digital video camera screen cleaner million .
Q: Megapixel IP cameras over the network , as far as how many meters ?
A: The direct connection to the farthest is generally recommended as 150 meters , more than 150 meters , can be extended through the switch , and the switch can be a sliding scale , which extends to the longer distances , while distances of up to one thousand meters above , you can use optical switches ( fiber transceiver) extends . Since fiber optic transceivers than analog video transmission using Optical cheap, so millions of high-definition monitor cost savings .
Q: Megapixel IP Camera POE power supply if used , is reliable ?
A : POE power supply, is already a very mature technology, already on the market through long-term verification , it has to be investigated is not a new technology , so fundamental to worry about . POE power supply network , the voltage is 48V, reach the camera, turn the camera into the operating voltage .
From:http://www.vstarcam.com/channel/Megapixel-network-camera-for-engineering-burdens-335.html
Megapixel network camera three off
Megapixel network camera three off
Q: Bandwidth - one million high-definition monitor is affected by the network bandwidth limitations ?
A: The one million -pixel high -definition network camera because , in theory, will lead to greater stream , but because the snow noise is small, saving the stream , which reduces the bandwidth limitations . In addition, one million high-definition IP Camera usually have dual-stream technology, namely local ( LAN bandwidth is sufficient ) HD video recording , remote can be used according to the bandwidth CIF resolution monitor , so basically no network bandwidth troubles.
Q: price - high definition is not necessarily expensive ?
A: The general view is that : HD inevitably high price you pay . This is mainly because in the past , one million high-definition network camera mostly imported from abroad, the price is extremely expensive. But in recent years , the domestic one million high-definition technology continues to mature and to market , significant cost reductions , the price is much lower than the imported high-definition cameras , high-end projects , whether in the government or the low-end residential market, domestic digital HD network camera price is much higher than foreign firms , to bring low-cost high-quality high-definition security user experience.
Q: Illumination - how to solve one million high-definition camera at night or in low-light control issues ?
A: For a long time , illumination is plagued Megapixel network camera is a major problem . To make one million HD illumination achieve the best results , first of all have a large selection of lens F value of the lens , light-sensitive photoreceptor large area , such as 1/ 2 , 1/2.5 or 1/ 3, in the military industry also typically more large, but the civilian security monitoring usually consider the cost , mostly for 1/2.5-1/3 ' . APTINA companies such as the U.S. launch of the new 1.3-megapixel low salvation 1/ 3 ' sensitive , intelligent use of this device to be rapidly developed Illumination Wide Dynamic million high-definition camera , taking into account the clarity and illumination , especially in low-light effect, under the same control environment is far superior to analog cameras , this breakthrough will greatly accelerate the digital Megapixel IP Camera spread.
From:http://www.vstarcam.com/channel/Megapixel-network-camera-three-off-334.html
Q: Bandwidth - one million high-definition monitor is affected by the network bandwidth limitations ?
A: The one million -pixel high -definition network camera because , in theory, will lead to greater stream , but because the snow noise is small, saving the stream , which reduces the bandwidth limitations . In addition, one million high-definition IP Camera usually have dual-stream technology, namely local ( LAN bandwidth is sufficient ) HD video recording , remote can be used according to the bandwidth CIF resolution monitor , so basically no network bandwidth troubles.
Q: price - high definition is not necessarily expensive ?
A: The general view is that : HD inevitably high price you pay . This is mainly because in the past , one million high-definition network camera mostly imported from abroad, the price is extremely expensive. But in recent years , the domestic one million high-definition technology continues to mature and to market , significant cost reductions , the price is much lower than the imported high-definition cameras , high-end projects , whether in the government or the low-end residential market, domestic digital HD network camera price is much higher than foreign firms , to bring low-cost high-quality high-definition security user experience.
Q: Illumination - how to solve one million high-definition camera at night or in low-light control issues ?
A: For a long time , illumination is plagued Megapixel network camera is a major problem . To make one million HD illumination achieve the best results , first of all have a large selection of lens F value of the lens , light-sensitive photoreceptor large area , such as 1/ 2 , 1/2.5 or 1/ 3, in the military industry also typically more large, but the civilian security monitoring usually consider the cost , mostly for 1/2.5-1/3 ' . APTINA companies such as the U.S. launch of the new 1.3-megapixel low salvation 1/ 3 ' sensitive , intelligent use of this device to be rapidly developed Illumination Wide Dynamic million high-definition camera , taking into account the clarity and illumination , especially in low-light effect, under the same control environment is far superior to analog cameras , this breakthrough will greatly accelerate the digital Megapixel IP Camera spread.
From:http://www.vstarcam.com/channel/Megapixel-network-camera-three-off-334.html
Rediscover Megapixel IP Cameras
Rediscover Megapixel IP Cameras
Q: What digital camera is a network camera before you ?
A: Digital cameras , according to the difference in transmission mode , a USB camera ( that is, the field of IT computer camera ) and network cameras , and IP Camera are usually divided into two types , one is the front-end based on analog CCTV cameras , followed by video processing and network transmission module , this camera has many of the same drawbacks analog cameras , no more than the highest quality D1, the other is pure digital high-definition video camera , it does not repeat the digital to analog conversion , directly to digital video processing and network transmission out. The latter will replace the digital high-definition network cameras former traditional network cameras.
Q: Megapixel IP cameras occupy hard big?
A: Megapixel IP Camera, pixels high naturally occupied hard disk capacity is large, but because it is a digital signal camera , you can do better signal to noise ratio , the picture is clean, snowflake points less , thus saving a lot of disk space . With 720P HD , for example, takes an hour each way video 1G hard disk space can be controlled in less than analog monitor with D1 resolution video stream considerably .
Q: Megapixel IP cameras is not pixels the higher the better ?
A: Megapixel IP camera, if appropriate choice of photoreceptors and video compression processor , you can easily do 1,300,000 , 2,000,000 , and even 500 million pixels . However, not more pixels, the higher the value of the camera application . For security surveillance cameras , in addition to considering pixels, while also considering the illumination . And generally the higher the pixels , illumination worse , pixel and illumination is inversely proportional to the other pixels, the stream will be greater capacity and disk footprint . In many sellers live show, the camera more than 2,000,000 pixels in effect , most of the viewfinder bright outdoor light , indoor show rarely under low light surveillance video , which is actually a misleading buyers .
Q : Millions of how the quality of high-definition network camera ?
A: Currently Megapixel network camera , also belong to the emerging high-tech products , is still in the early stages of development , did not enter the price battle, because with a reasonable profit guarantee , while bigger companies are generally not on the quality of relaxed, natural we do not need such as analog cameras , because profit is very thin and cut corners to make things , whether it is chips, electronic components, or infrared lamps are used is a quality assurance brand goods , longer service life .
Q : Millions of high-definition era , CMOS will largely replaced the CCD?
A: In the era of analog monitor , CCD because of early development , while providing a complimentary full technical program , has been favored by many camera manufacturers . However, the development of CMOS chips late step , early technology behind the CCD, plus a full set of technology solutions mature much, so do not give good. Later , CMOS chip technology has been developing rapidly , low-light performance is also improved significantly, especially in the field of mobile phones and other consumer electronics , is already extensive use of CMOS sensor , a lot of high-end digital camera is a CMOS instead of CCD. In recent years, companies such as American APTINA increased emphasis on the field of security , cost-effective CMOS chips began to flow to the field of security , and thus be in the security field position CCD produces impact, especially into the era of digital high-definition , digital high-definition video camera gradually replacing analog cameras , CMOS has replaced the CCD into the mainstream trend.
Q : CCD HD network camera with millions of millions of high-definition CMOS compared to illumination will be better?
A: According to the photoreceptor semiconductor company's technical staff to say , the same sensitive area , the more pixels , each pixel of the photosensitive area is smaller, each pixel on the number of photons received less natural light photoreceptor sensitivity worse . Many people often mistakenly take hundreds of thousands of pixels , 1/ 3 ' inch CCD analog cameras to go with the 1/3' inch CMOS Megapixel IP Camera compare illumination effect, which draw the wrong conclusions , that better illumination CCD . In fact, APTINA Company 1/3 ' inch 1,300,000 pixel chips made using low-light cameras and a Nissan 1/ 3' inch CCD chips made of 1.3-megapixel digital high-definition network camera for low-light effect of contrast , in the same conditions , CMOS is not only inferior to CCD, but visually far beyond the CCD million cameras.
Q: What do one million high-definition monitor whether the time is ripe ?
A: Several years ago , security industry had already started to sing "Million HD" trend , but they are thunder, little rain , mainly due to the time the domestic Megapixel immature technology . Today , whether it is from a technical point of view or the market demand, to make one million high-definition monitor timing are ripe. On the technical side , that represents the number of domestic companies have tackled the camera from the front to the back-end storage , and network transmission and other aspects of the problem, to achieve a clear picture quality, low light , wide dynamic range and other functions, and the results are better than traditional analog cameras , with a very high price. Second, from the customer's point of view, analog monitor has been unable to meet the market definition , intelligence requirements, Megapixel surveillance has become the market mainstream appeal points . However, due to contractors and end- users Megapixel always lack a thorough understanding of , so many people are still on the sidelines. 2010 million high-definition , the security companies to seize the opportunity is bigger and stronger competition in the market the necessary conditions , if you wait a million industry completely universal definition , then the business may be out of the market and consumers , can also cause enormous waste of social resources .
From:http://www.vstarcam.com/channel/Rediscover-Megapixel-IP-Cameras-333.html
Q: What digital camera is a network camera before you ?
A: Digital cameras , according to the difference in transmission mode , a USB camera ( that is, the field of IT computer camera ) and network cameras , and IP Camera are usually divided into two types , one is the front-end based on analog CCTV cameras , followed by video processing and network transmission module , this camera has many of the same drawbacks analog cameras , no more than the highest quality D1, the other is pure digital high-definition video camera , it does not repeat the digital to analog conversion , directly to digital video processing and network transmission out. The latter will replace the digital high-definition network cameras former traditional network cameras.
Q: Megapixel IP cameras occupy hard big?
A: Megapixel IP Camera, pixels high naturally occupied hard disk capacity is large, but because it is a digital signal camera , you can do better signal to noise ratio , the picture is clean, snowflake points less , thus saving a lot of disk space . With 720P HD , for example, takes an hour each way video 1G hard disk space can be controlled in less than analog monitor with D1 resolution video stream considerably .
Q: Megapixel IP cameras is not pixels the higher the better ?
A: Megapixel IP camera, if appropriate choice of photoreceptors and video compression processor , you can easily do 1,300,000 , 2,000,000 , and even 500 million pixels . However, not more pixels, the higher the value of the camera application . For security surveillance cameras , in addition to considering pixels, while also considering the illumination . And generally the higher the pixels , illumination worse , pixel and illumination is inversely proportional to the other pixels, the stream will be greater capacity and disk footprint . In many sellers live show, the camera more than 2,000,000 pixels in effect , most of the viewfinder bright outdoor light , indoor show rarely under low light surveillance video , which is actually a misleading buyers .
Q : Millions of how the quality of high-definition network camera ?
A: Currently Megapixel network camera , also belong to the emerging high-tech products , is still in the early stages of development , did not enter the price battle, because with a reasonable profit guarantee , while bigger companies are generally not on the quality of relaxed, natural we do not need such as analog cameras , because profit is very thin and cut corners to make things , whether it is chips, electronic components, or infrared lamps are used is a quality assurance brand goods , longer service life .
Q : Millions of high-definition era , CMOS will largely replaced the CCD?
A: In the era of analog monitor , CCD because of early development , while providing a complimentary full technical program , has been favored by many camera manufacturers . However, the development of CMOS chips late step , early technology behind the CCD, plus a full set of technology solutions mature much, so do not give good. Later , CMOS chip technology has been developing rapidly , low-light performance is also improved significantly, especially in the field of mobile phones and other consumer electronics , is already extensive use of CMOS sensor , a lot of high-end digital camera is a CMOS instead of CCD. In recent years, companies such as American APTINA increased emphasis on the field of security , cost-effective CMOS chips began to flow to the field of security , and thus be in the security field position CCD produces impact, especially into the era of digital high-definition , digital high-definition video camera gradually replacing analog cameras , CMOS has replaced the CCD into the mainstream trend.
Q : CCD HD network camera with millions of millions of high-definition CMOS compared to illumination will be better?
A: According to the photoreceptor semiconductor company's technical staff to say , the same sensitive area , the more pixels , each pixel of the photosensitive area is smaller, each pixel on the number of photons received less natural light photoreceptor sensitivity worse . Many people often mistakenly take hundreds of thousands of pixels , 1/ 3 ' inch CCD analog cameras to go with the 1/3' inch CMOS Megapixel IP Camera compare illumination effect, which draw the wrong conclusions , that better illumination CCD . In fact, APTINA Company 1/3 ' inch 1,300,000 pixel chips made using low-light cameras and a Nissan 1/ 3' inch CCD chips made of 1.3-megapixel digital high-definition network camera for low-light effect of contrast , in the same conditions , CMOS is not only inferior to CCD, but visually far beyond the CCD million cameras.
Q: What do one million high-definition monitor whether the time is ripe ?
A: Several years ago , security industry had already started to sing "Million HD" trend , but they are thunder, little rain , mainly due to the time the domestic Megapixel immature technology . Today , whether it is from a technical point of view or the market demand, to make one million high-definition monitor timing are ripe. On the technical side , that represents the number of domestic companies have tackled the camera from the front to the back-end storage , and network transmission and other aspects of the problem, to achieve a clear picture quality, low light , wide dynamic range and other functions, and the results are better than traditional analog cameras , with a very high price. Second, from the customer's point of view, analog monitor has been unable to meet the market definition , intelligence requirements, Megapixel surveillance has become the market mainstream appeal points . However, due to contractors and end- users Megapixel always lack a thorough understanding of , so many people are still on the sidelines. 2010 million high-definition , the security companies to seize the opportunity is bigger and stronger competition in the market the necessary conditions , if you wait a million industry completely universal definition , then the business may be out of the market and consumers , can also cause enormous waste of social resources .
From:http://www.vstarcam.com/channel/Rediscover-Megapixel-IP-Cameras-333.html
Teach you to do a smart network camera buyers
Teach you to do a smart network camera buyers
Network Camera is a high-tech new products, due to security across the network and the two little before the stakeholders in the industry , Gehangrugeshan , engage in surveillance networks do not understand , do not understand the monitoring network , which gives the already blurry webcams cast a veil of mystery . For now, the dealer camp, most of the sales staff know it is only at the level of the water Flower in the Mirror of hazy . Let alone a buyer . The vast majority of buyers or to one thinks , or to speak by the price . Result is that buyers can not buy the right products , soon put the product into the Recycle Bin. Money is spent , not accomplishing things .
This article will teach you to know about network cameras, make a smart buyer.
First, recognize network camera :
We need first to understand the network cameras. Network camera called IP CAMERA ( abbreviated IPC) by the network coding module and analog camera combination. Network coding module analog cameras capture analog video signal into a digital signal compression coding , which can directly access the network switching and routing equipment ( switches, routers, these two products for the network users are not familiar with it ) , and then access the Internet. IPC own IP address , some brands of IPC also comes with a domain name. LAN users can log in to view the IP address of the IPC and control surveillance video management and recording. Remote users can log in through the IPC IPC domain name to watch , control, management, and video. Both LAN users or remote users to log IPC available through a web browser (IE) and the corresponding video centralized management software.
Relative to analog cameras , IPC network camera can be easier to achieve control especially remote monitoring, construction and maintenance easier , better support for audio , better support alarm linkage , more flexible video storage , richer product selection , more high-definition video effects and more perfect monitoring and management. In addition , IPC supports WIFI wireless access , 3G access , POE power supply ( network-powered ) and fiber access . IPC for the emergence of network and security industry landmark historical significance.
Most of the IPC shape and analog cameras almost, because IPC is often used in homes and offices , taking into account aesthetics , IPC has richer and more beautiful shape . If VStarcam of T7892WIP, T7838WIP.
IPC 's great value . To install it at home , you can see the home anywhere in real time : to understand the child 's learning , caring for the elderly , to see pets ; install it in the shop , you can visit a shop without leaving home : Understanding the work of the staff , traffic analysis, display cases and other goods ; install it in the product exhibition room, you can feel free to let customers see samples of distant ; install it in the hospital , the patient can get distant doctors' consultation is no exaggeration to say that , IPC can be installed in any one place , IP Camera eventually into millions of households , into the various sectors of society in various fields so as to make a significant contribution to the harmonious development .
Second, the network camera several key parameters
1 ) Lens
Lens is a video capture first off , the lens will naturally affect the quality of the video effects, although there are many lenses , a great effect on the video , shot in price from tens of dollars to several thousand dollars. However, surveillance is still not a few million to buy the lens , lenses are available in the market and therefore are basically similar. However, the focal length of the lens effect of the video is worth noting , which means that you should consider when selecting products whether you choose a model with interchangeable lenses , or to consider whether to select the zoom lens. Here have to mention , zoom refers to the focal length of the lens can be changed . Some IPC functionality with digital zoom , digital zoom means that you can view the video image to enlarge , did not change the sharpness of the image , the application of the IPC little value . Beware some are not particularly professional sales staff or JS one concept .
2 ) Image Sensor
This is the impact of the key factors of video effects . There are currently two kinds of CMOS and CCD , CCD dynamic range and clarity is good, technology is very mature , both picture quality and anti- noise capability , but its weakness is the power consumption , high production costs ; while COMS development today , of the various indicators was close CCD, and low power consumption , low cost advantage, so now there are many manufacturers will choose as a photosensitive core components using CMOS .
3 ) video compression algorithm ( also known as video compression format ) .
This is the IP network camera the most important key factor , because it directly determines the video resolution , video fluency and video storage space. And through my years of understanding, this was always the most important factor is the seller intentionally or unintentionally avoided , because it may be in itself can not tell where Cn , or shoddy motives. But as a savvy buyer you must understand clearly. IPC currently on the market are mainly H.264, MPEG4 two video compression algorithms. Stronger H.264 compression , video loss is less, so clearer and more fluid. The former can support the 25 frames / second frame rate , which is generally not more than 10 frames / sec . This means that the latter's video is not coherent, not real ; since MPEG4 compression ratio is not big enough , if you do the whole real-time , stream is too large, it is difficult to see the remote .
4 ) image format
Image format of the video image is to determine the actual number of pixels , of the DVD format , and VGA (640 * 480) format, and CIF (352 * 288) form two kinds , DVD image format family contains D1 (720 * 576 interlaced scanning ), D2 ( 1048 * 720), D3 (1920 * 1080 interlaced ), D4 (1280 * 720 progressive scan ) and D5 (1920 * 1080 progressive scan ) five kinds of image formats , the current mainstream market for D1. supports D3 and D4 of megapixels is also listed, but due to its large bandwidth , is not widely applied .
Different pixels with different image format , video file sizes are not the same . If it is not the same image format, we can not alone recording hard disk size required to determine the merits of the IPC . An IPC image formats can often be adjusted, which means that if your hard disk space is not big enough, but require a longer recording time , it can be achieved by reducing the image format .
5 ) Frame Rate
As we all know , any video files are composed by a continuous picture , a picture we call it a , like a second of video images from the 25 contiguous composition , when the frame rate is 25 frames / sec. In the PAL standard , 25 frames / sec video performance can be very realistic action . If less than 25 , the video of the action will not consistent , the lower the more incoherent even be jumping movements artifacts . Therefore, the frame rate is very important in video surveillance . This parameter is the interface between the video monitor will show it. This parameter , also was a lot of not very professional salesperson avoided. We buy products must pay attention to this , because if can support 25 frames / sec IPC cost difference as well.
6 ) dual-stream
Some IPC is designed to support two video signal, i.e. a so-called dual-stream . Benefits of dual-stream stream is watching all the way , all the way to stream memory and storage are used than watch stream all the way to more effectively prevent network congestion , so that it can better protect the video in effective network bandwidth fluency.
7 ) front-end storage
Some of the IPC with an SD card slot or USB removable storage interface, we called the front end of its storage tube . Front-end storage is often used to monitor bandwidth is not very adequate environment . Some environmental inconvenience Zhuangkuan Dai , the use of front-end storage capabilities , thus saving play a video surveillance monitoring results, to say that is an option.
8 ) Product Line
Most of the larger surveillance systems, often applied to various types of products, due to the current all -party video management software and is compatible with other brands of IPC is difficult . Therefore, in order to monitor the system choose the brand , it is necessary to consider whether the brand has a rich product line to be able to meet the needs of a variety of environments , as well as system solutions capabilities. Such as support for infrared , support WIFI wireless , support POE, supports fiber access, support PTZ , support zoom, so if there is video server with some special combination of analog cameras and whether the video decoder can access the TV wall and so on.
9 ) Software Features
Most monitoring systems require centralized management, so the video management software features are powerful , the interface is friendly and also in product selection must be taken into account. Management software modules more, so the identification of the merits of video management software requires comprehensive consideration , can not be overstated certain function , a function can not ignore the need to take the actual demand .
In addition to these nine outside , infrared night vision capability , ultra- low-light , wide dynamic range , light suppression and other functions are also some important parameters of IPC . In summary , IPC selection needs to have a certain expertise and to be more patient . Do not choose expensive just choose right , I hope you choose to own a suitable IP network camera.
From:http://www.vstarcam.com/channel/Teach-you-to-do-a-smart-network-camera-buyers-332.html
Network Camera is a high-tech new products, due to security across the network and the two little before the stakeholders in the industry , Gehangrugeshan , engage in surveillance networks do not understand , do not understand the monitoring network , which gives the already blurry webcams cast a veil of mystery . For now, the dealer camp, most of the sales staff know it is only at the level of the water Flower in the Mirror of hazy . Let alone a buyer . The vast majority of buyers or to one thinks , or to speak by the price . Result is that buyers can not buy the right products , soon put the product into the Recycle Bin. Money is spent , not accomplishing things .
This article will teach you to know about network cameras, make a smart buyer.
First, recognize network camera :
We need first to understand the network cameras. Network camera called IP CAMERA ( abbreviated IPC) by the network coding module and analog camera combination. Network coding module analog cameras capture analog video signal into a digital signal compression coding , which can directly access the network switching and routing equipment ( switches, routers, these two products for the network users are not familiar with it ) , and then access the Internet. IPC own IP address , some brands of IPC also comes with a domain name. LAN users can log in to view the IP address of the IPC and control surveillance video management and recording. Remote users can log in through the IPC IPC domain name to watch , control, management, and video. Both LAN users or remote users to log IPC available through a web browser (IE) and the corresponding video centralized management software.
Relative to analog cameras , IPC network camera can be easier to achieve control especially remote monitoring, construction and maintenance easier , better support for audio , better support alarm linkage , more flexible video storage , richer product selection , more high-definition video effects and more perfect monitoring and management. In addition , IPC supports WIFI wireless access , 3G access , POE power supply ( network-powered ) and fiber access . IPC for the emergence of network and security industry landmark historical significance.
Most of the IPC shape and analog cameras almost, because IPC is often used in homes and offices , taking into account aesthetics , IPC has richer and more beautiful shape . If VStarcam of T7892WIP, T7838WIP.
IPC 's great value . To install it at home , you can see the home anywhere in real time : to understand the child 's learning , caring for the elderly , to see pets ; install it in the shop , you can visit a shop without leaving home : Understanding the work of the staff , traffic analysis, display cases and other goods ; install it in the product exhibition room, you can feel free to let customers see samples of distant ; install it in the hospital , the patient can get distant doctors' consultation is no exaggeration to say that , IPC can be installed in any one place , IP Camera eventually into millions of households , into the various sectors of society in various fields so as to make a significant contribution to the harmonious development .
Second, the network camera several key parameters
1 ) Lens
Lens is a video capture first off , the lens will naturally affect the quality of the video effects, although there are many lenses , a great effect on the video , shot in price from tens of dollars to several thousand dollars. However, surveillance is still not a few million to buy the lens , lenses are available in the market and therefore are basically similar. However, the focal length of the lens effect of the video is worth noting , which means that you should consider when selecting products whether you choose a model with interchangeable lenses , or to consider whether to select the zoom lens. Here have to mention , zoom refers to the focal length of the lens can be changed . Some IPC functionality with digital zoom , digital zoom means that you can view the video image to enlarge , did not change the sharpness of the image , the application of the IPC little value . Beware some are not particularly professional sales staff or JS one concept .
2 ) Image Sensor
This is the impact of the key factors of video effects . There are currently two kinds of CMOS and CCD , CCD dynamic range and clarity is good, technology is very mature , both picture quality and anti- noise capability , but its weakness is the power consumption , high production costs ; while COMS development today , of the various indicators was close CCD, and low power consumption , low cost advantage, so now there are many manufacturers will choose as a photosensitive core components using CMOS .
3 ) video compression algorithm ( also known as video compression format ) .
This is the IP network camera the most important key factor , because it directly determines the video resolution , video fluency and video storage space. And through my years of understanding, this was always the most important factor is the seller intentionally or unintentionally avoided , because it may be in itself can not tell where Cn , or shoddy motives. But as a savvy buyer you must understand clearly. IPC currently on the market are mainly H.264, MPEG4 two video compression algorithms. Stronger H.264 compression , video loss is less, so clearer and more fluid. The former can support the 25 frames / second frame rate , which is generally not more than 10 frames / sec . This means that the latter's video is not coherent, not real ; since MPEG4 compression ratio is not big enough , if you do the whole real-time , stream is too large, it is difficult to see the remote .
4 ) image format
Image format of the video image is to determine the actual number of pixels , of the DVD format , and VGA (640 * 480) format, and CIF (352 * 288) form two kinds , DVD image format family contains D1 (720 * 576 interlaced scanning ), D2 ( 1048 * 720), D3 (1920 * 1080 interlaced ), D4 (1280 * 720 progressive scan ) and D5 (1920 * 1080 progressive scan ) five kinds of image formats , the current mainstream market for D1. supports D3 and D4 of megapixels is also listed, but due to its large bandwidth , is not widely applied .
Different pixels with different image format , video file sizes are not the same . If it is not the same image format, we can not alone recording hard disk size required to determine the merits of the IPC . An IPC image formats can often be adjusted, which means that if your hard disk space is not big enough, but require a longer recording time , it can be achieved by reducing the image format .
5 ) Frame Rate
As we all know , any video files are composed by a continuous picture , a picture we call it a , like a second of video images from the 25 contiguous composition , when the frame rate is 25 frames / sec. In the PAL standard , 25 frames / sec video performance can be very realistic action . If less than 25 , the video of the action will not consistent , the lower the more incoherent even be jumping movements artifacts . Therefore, the frame rate is very important in video surveillance . This parameter is the interface between the video monitor will show it. This parameter , also was a lot of not very professional salesperson avoided. We buy products must pay attention to this , because if can support 25 frames / sec IPC cost difference as well.
6 ) dual-stream
Some IPC is designed to support two video signal, i.e. a so-called dual-stream . Benefits of dual-stream stream is watching all the way , all the way to stream memory and storage are used than watch stream all the way to more effectively prevent network congestion , so that it can better protect the video in effective network bandwidth fluency.
7 ) front-end storage
Some of the IPC with an SD card slot or USB removable storage interface, we called the front end of its storage tube . Front-end storage is often used to monitor bandwidth is not very adequate environment . Some environmental inconvenience Zhuangkuan Dai , the use of front-end storage capabilities , thus saving play a video surveillance monitoring results, to say that is an option.
8 ) Product Line
Most of the larger surveillance systems, often applied to various types of products, due to the current all -party video management software and is compatible with other brands of IPC is difficult . Therefore, in order to monitor the system choose the brand , it is necessary to consider whether the brand has a rich product line to be able to meet the needs of a variety of environments , as well as system solutions capabilities. Such as support for infrared , support WIFI wireless , support POE, supports fiber access, support PTZ , support zoom, so if there is video server with some special combination of analog cameras and whether the video decoder can access the TV wall and so on.
9 ) Software Features
Most monitoring systems require centralized management, so the video management software features are powerful , the interface is friendly and also in product selection must be taken into account. Management software modules more, so the identification of the merits of video management software requires comprehensive consideration , can not be overstated certain function , a function can not ignore the need to take the actual demand .
In addition to these nine outside , infrared night vision capability , ultra- low-light , wide dynamic range , light suppression and other functions are also some important parameters of IPC . In summary , IPC selection needs to have a certain expertise and to be more patient . Do not choose expensive just choose right , I hope you choose to own a suitable IP network camera.
From:http://www.vstarcam.com/channel/Teach-you-to-do-a-smart-network-camera-buyers-332.html
What is a network camera depth analysis
What is a network camera ? What is a network camera depth analysis
Today Granville Xindakang technical staff as we talk about what is a IP Camera , through this article I hope everyone on the network camera have a deeper understanding.
IP Camera and network video camera the name suggests is a combination of a high-tech technology products , not only with the traditional image capture cameras all functions , the machine also comes with a digital compression controller and WEB-based operating system, making the video data after compression , via LAN , internet or wireless network to the end users. The remote user can own a PC using a standard IE browser, according to the IP Cameracomes with a separate IP address to access the network cameras , real-time monitoring target site conditions , and on the real-time editing and storing the image data , It also can be controlled via the network PTZ cameras and lenses , for all-round monitoring.
From the network camera's external structure, network cameras currently on the market there is a lens for the integration of embedded models , this network camera lens is fixed and can not be changed ; another you may need to replace the standard C / CS mount lens, but with a C-type lenses must CS-C converter with the installation. However, the internal structure , said either model, the basic structure of the network camera mostly by the lens, filter , image sensor , digital image processor , and a compression chip with network connectivity server components. IP Camera as the camera in the new family member , also has the same operation with the ordinary camera performance , for example , with automatic white balance, electronic shutter, auto iris, auto gain control, automatic backlight compensation function . On the other hand , due to network cameras with networking capabilities , so they can support multiple users to connect at the same time , some network camera also has a dual function , can simultaneously achieve analog output and digital output network .
Understanding of the network camera, we detail next network video server. From a certain point , the video server can be seen as a network camera without a lens , or without hard drive DVR, its structure is substantially similar to the network camera is determined by one or more analog video input port , digital image processor, the compression chip and a server with a network connection function of the composition. The input video servers digitize analog video signal processing, digital signal pattern sent to the network , enabling real-time remote monitoring purposes. Since the analog camera video server successfully " transformed " as network cameras, so it is also a network monitoring system with the current analog CCTV systems to integrate the best way. In addition to video servers and nnetwork camera can achieve the same function, the device configuration is more flexible. IP Camera are usually subject to its own lens and body functional limitations , and video server in addition to conventional cameras can be connected to the ordinary , but also to some of the special features of the camera is connected , for example: low-light cameras , high sensitivity infrared cameras.
Today Granville Xindakang technical staff as we talk about what is a IP Camera , through this article I hope everyone on the network camera have a deeper understanding.
IP Camera and network video camera the name suggests is a combination of a high-tech technology products , not only with the traditional image capture cameras all functions , the machine also comes with a digital compression controller and WEB-based operating system, making the video data after compression , via LAN , internet or wireless network to the end users. The remote user can own a PC using a standard IE browser, according to the IP Cameracomes with a separate IP address to access the network cameras , real-time monitoring target site conditions , and on the real-time editing and storing the image data , It also can be controlled via the network PTZ cameras and lenses , for all-round monitoring.
From the network camera's external structure, network cameras currently on the market there is a lens for the integration of embedded models , this network camera lens is fixed and can not be changed ; another you may need to replace the standard C / CS mount lens, but with a C-type lenses must CS-C converter with the installation. However, the internal structure , said either model, the basic structure of the network camera mostly by the lens, filter , image sensor , digital image processor , and a compression chip with network connectivity server components. IP Camera as the camera in the new family member , also has the same operation with the ordinary camera performance , for example , with automatic white balance, electronic shutter, auto iris, auto gain control, automatic backlight compensation function . On the other hand , due to network cameras with networking capabilities , so they can support multiple users to connect at the same time , some network camera also has a dual function , can simultaneously achieve analog output and digital output network .
Understanding of the network camera, we detail next network video server. From a certain point , the video server can be seen as a network camera without a lens , or without hard drive DVR, its structure is substantially similar to the network camera is determined by one or more analog video input port , digital image processor, the compression chip and a server with a network connection function of the composition. The input video servers digitize analog video signal processing, digital signal pattern sent to the network , enabling real-time remote monitoring purposes. Since the analog camera video server successfully " transformed " as network cameras, so it is also a network monitoring system with the current analog CCTV systems to integrate the best way. In addition to video servers and nnetwork camera can achieve the same function, the device configuration is more flexible. IP Camera are usually subject to its own lens and body functional limitations , and video server in addition to conventional cameras can be connected to the ordinary , but also to some of the special features of the camera is connected , for example: low-light cameras , high sensitivity infrared cameras.
Detailed definition network cameras six major upgrade
Detailed definition network cameras six major upgrade
1 , HD IP Camera and network bandwidth sensitivity : Image sensor determines megapixels network camera picture quality, most sensors aspect ratio of 4:3 , but in order to accommodate more pixels, using a 16:9 an image sensor , each pixel larger, directly improve the image resolution and sensitivity are increasing .
2 , high-definition network camera internal structure : the resulting image quality for the front of the camera , in addition to relying on the sensor , the network bandwidth is also very important. In a monitoring system, how to more effectively control bandwidth allocation can not only save storage space , the image quality is not affected. In a variety of network monitoring solution , it was proposed to use SVC video data into different levels of resolution, which effectively alleviate the pressure on bandwidth and processor resources ; response to this demand , you can adjust the image size and frame rate , to meet different customer equipment under different network environments affordability .
3 , high-definition network camera multi-stream video compression : multi-stream monitoring system meant to allow different types of video compression formats , such as H.264 or M-JPEG, these data streams through the network bandwidth to transmit . Stream processors depends on the camera , some manufacturers use the core stream control Baraka and other enterprises the gap between the different codecs while also front-end products may cause incompatibility problems .
4 , high-definition network camera stream size impact on the quality : HD Stream Control Management feature allows users to transmit and store stage manage images, without losing any signal affecting image quality. Another big advantage of this feature lies in an important quality control terminal can pass back to the command center , thus easing pressure on bandwidth and greatly reduce the processing load on the remote client .
5, the special circumstances of the HD IP Camera: In order to broaden the field of video surveillance applications , businesses who have introduced for the industry of the product , such as commercial construction, education , traffic monitoring , safe city , the airport and the monetary requirements for high-definition images than high monitoring equipment. For different applications, the camera is also designed to meet stringent conditions .
6 , extreme environment monitoring applications : whether it is to bring high-definition IP Camera industry opportunities , or the manufacturer changes of service and solutions , the aim is to use the monitor to reduce labor costs, solving various problems encountered in life . Expansion of domestic surveillance market has not yet fully open , which there are many security companies are also pressures .
1 , HD IP Camera and network bandwidth sensitivity : Image sensor determines megapixels network camera picture quality, most sensors aspect ratio of 4:3 , but in order to accommodate more pixels, using a 16:9 an image sensor , each pixel larger, directly improve the image resolution and sensitivity are increasing .
2 , high-definition network camera internal structure : the resulting image quality for the front of the camera , in addition to relying on the sensor , the network bandwidth is also very important. In a monitoring system, how to more effectively control bandwidth allocation can not only save storage space , the image quality is not affected. In a variety of network monitoring solution , it was proposed to use SVC video data into different levels of resolution, which effectively alleviate the pressure on bandwidth and processor resources ; response to this demand , you can adjust the image size and frame rate , to meet different customer equipment under different network environments affordability .
3 , high-definition network camera multi-stream video compression : multi-stream monitoring system meant to allow different types of video compression formats , such as H.264 or M-JPEG, these data streams through the network bandwidth to transmit . Stream processors depends on the camera , some manufacturers use the core stream control Baraka and other enterprises the gap between the different codecs while also front-end products may cause incompatibility problems .
4 , high-definition network camera stream size impact on the quality : HD Stream Control Management feature allows users to transmit and store stage manage images, without losing any signal affecting image quality. Another big advantage of this feature lies in an important quality control terminal can pass back to the command center , thus easing pressure on bandwidth and greatly reduce the processing load on the remote client .
5, the special circumstances of the HD IP Camera: In order to broaden the field of video surveillance applications , businesses who have introduced for the industry of the product , such as commercial construction, education , traffic monitoring , safe city , the airport and the monetary requirements for high-definition images than high monitoring equipment. For different applications, the camera is also designed to meet stringent conditions .
6 , extreme environment monitoring applications : whether it is to bring high-definition IP Camera industry opportunities , or the manufacturer changes of service and solutions , the aim is to use the monitor to reduce labor costs, solving various problems encountered in life . Expansion of domestic surveillance market has not yet fully open , which there are many security companies are also pressures .
订阅：
博文 (Atom)