Detailed solution of the composition of the Network Camera

Detailed solution of the composition of the Network Camera

The IP Camera generally by the lens, image sensor, sound sensor, A / D converter, image, sound, a controller network server, an external alarm control interface and other components.
Lens:
Lens as the front-end components of the Network Camera, fixed iris, auto iris, auto zoom, auto zoom and other types of analog cameras.
An image sensor, a sound sensor:
The image sensor CMOS and CCD two modes. The CMOS both complementary metal oxide semiconductor, CMOS is mainly made of the use of these two elements of the silicon and germanium semiconductor, and negatively charged by the CMOS transistors to implement the basic functions and the positively charged. Two complementary effects arising from the current processing chip can be recorded and interpreted as images. CMOS CCD main advantage is the very power. Unlike diode CCD and CMOS circuit is almost no static power consumption. This makes the power consumption of the CMOS only ordinary CCD is about 1/3, the CMOS important issues in handling fast transform the image, since the current conversion is too frequently overheating. Good dark current suppression is not an issue if the suppression of bad on very prone to noise.
The CCD image sensor is constituted by a two-dimensional arrangement of the photodiode and its transmission circuit on a monocrystalline silicon substrate was. Photodiode light into electric charge, and then sent by the conversion circuit and output.
Typically, to send excellent image quality equipment using a CCD image sensor, select CMOS image sensor products focus on power consumption and cost. But new technology is to overcome the inherent weaknesses of each body is, while retaining some characteristics suitable for a particular purpose. This part is the same as analog IP Camera. Sound sensors that pick up the sound or called microphone with the traditional principle of the microphone.
A / D converter
The function of the A / D converter is the analog signal such as image and sound is converted into a digital signal.
CMOS mode based on the image sensor module has a direct digital signal output of the interface, without the A / D converter; CCD mode based on the image sensor module, if there is a direct digital output interface, without the A / D converter, but since this module mainly designed for analog cameras, only the analog output interface, hence, the need for A / D conversion.
Images, audio encoder
Image after A / D conversion, the digital sound signal is encoded according to a certain format or standard compression. The compression coding purpose is to facilitate the realization of the digitization of the audio / visual signals and multimedia signal; facilitate transmission of said signal in the computer system on the network and the World Wide Web without distortion.
Image coding compression technology, there are two: one is hardware compression coding, upcoming coding compression algorithm curing on the chip; another DSP-based software coding compression software running on the DSP image compression coding. Similarly, we can use sound compression the hardware encoding compression and software compression coding standard MP3 format.
Controller:
The controller is the heart of the IP Camera, it shoulders the management and control of the Network Camera. If hardware compression encoding, the controller is an independent parts; software coding compression, the controller is running encoding compression software DSP that combine the two.

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