An important part of the IP Camera

An important part of the IP Camera
Webcams mainly consists of two parts: the camera function related components (lenses, filters, image sensors) and related parts and computer functions (video encoders, network servers, external alarm and control interface). Wherein the components associated with the camera function for capturing an image (of different wavelengths of light) and converts it to an electrical signal. In fact, these signals or analog signals, they are further converted to digital signals and transmission components associated computer functions given by these parts are compressed and transmitted through the network out.
1 camera lens
HD IP Camera lens as the front end components, a fixed aperture, auto iris, auto zoom, auto zoom and other types of analog cameras with the same.
2 filter
Filter, scientific optical low-pass filter, the main function of the filter is as follows:
1) filter Infrared: Infrared color CCD sensor DSP will lead to the correct color image can not be calculated, leading to color color distortion, color distortion in order to ensure the camera, so must add a filter, the light in the infrared part of the filter.
2) Dressing Light: Camera CCD is a dolphin photoreceptor (CELL) constitutes, for fear of interference to neighboring photoreceptor, so you need to be corrected for the incident, leaving only incident of direct light. Camera filters commonly used quartz plate, quartz with physical polarization characteristics of quartz can retain part of the incident light and direct oblique incident light reflected off part, so you can avoid the side effects of oblique incident light sensitive point.
3 image sensor and sound sensor
CMOS and CCD image sensor has two modes.
CMOS image sensors can neither complementary metal oxide semiconductor, CMOS is the use of silicon and germanium these two elements made of a semiconductor, a negative charge by the CMOS transistors and the positively charged to achieve the basic functions. Effect of these two complementary current generated chips can be processed into an image recording and interpretation. The main advantage for CCD CMOS is very low power, CMOS image sensor power consumption of only ordinary CCD, 1/3, CMOS important issue is dealing with rapidly changing images, since the current transformation too frequent overheating. Dark current suppression good on a big problem, if suppression is very prone to bad noise.
CCD image sensor in a silicon substrate by a two-dimensionally arranged in the photodiode and the transmission circuit. The photodiode of the light into electric charge, and then the conversion circuit and the output transmission.
Normally, the delivery excellent image quality CCD image sensor devices are used, and focus on power consumption and cost of products select CMOS image sensors. But the new technology is to overcome the inherent weaknesses of each device body, while retaining the specific purpose for certain characteristics. This part of the same with analog cameras.
Sound sensors that pick up the sound or call microphone, the same principles with traditional microphone.
4. A / D converter
A / D converter function is to image and sound and other analog signals are converted into digital signals.
5 images, audio coder
The A / D converted image, audio digital signal format or according to a certain standard encoding. The purpose of encoding is to facilitate the realization of audio / video signal and the digital multimedia signal; facilitate the computer systems, networks, and the World Wide Web to transmit the signal without distortion.
Currently, the image coding compression technology has two: one is hardware encoding compression, coding compression algorithm will solidify on the chip; another one is based on the DSP software coding compression software that runs on the DSP for image compression coding. Similarly, we can use voice compression coding hardware compression and software compression, encoding standards such as MP3 format.
6.Controller
Controller is the heart of high-definition Network Camera, its role is to manage and control network camera work. If the hardware compression, the controller is a separate component; if a software encoding, encoding controller that is running the software DSP, that combine the two.
7 web server
Web server provides IP Camera network function, it uses RTP / RTCP, UDP, HTTP, TCP / IP and other related network protocols, allowing users from their PC using a standard browser HD Network Camerabased on the IP address of the network camera to access, view live images and control the camera's lens and head.
8 external alarm, the control interface
Network Camera for engineering applications provide a practical external interface, such as control PTZ 485 interface for alarm signal input and output I / O port. If found to have infrared probe target appears, send an alarm signal to the network cameras, network cameras automatically adjust the camera direction and real-time video; On the other hand, when the IP Camera detects a moving object appears, also sent out an alarm signal.
Welcome to the P2P IP Camera manufacturerVStarcam website: http://www.vstarcam.com for more information!