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2, Network Camera: Camera is a combination of a new generation of traditional cameras and network technology generated, it can be transmitted over the network to another image side of the globe, and the distal end of the viewer without using any professional software home network cameras, as long as standard web browser (eg "Microsoft IE or Netscape) to monitor its image as an embedded network camera chip, embedded real-time operating system, different data must be converted to the corresponding signals are transmitted to: general analog data analog signal (Analog Signal), for example by a series of successive changes of electromagnetic waves (e.g., radio and television broadcasting electromagnetic waves), or voltage signal (such as telephone transmission of the audio signal voltage) to represent; the digital data is a digital signal ( Digital Signal), for example, by a series of discontinuous change of voltage pulses (e.g. we can use a constant positive voltage represents a binary number, with a constant negative voltage represents a binary 0), or optical pulse to indicate when the analog signal is a continuous change The electromagnetic wave is represented, both electromagnetic signal carrier itself, at the same time as the transmission medium; and when the analog signal is a continuously varying signal voltage using when expressed pnp network camera, it is generally by a conventional analog signal transmission line (e.g. a telephone network, cable TV network) to transmit. When the digital signal using intermittent changing voltage or light pulses to represent the general you need to use twisted pair or fiber optic cable will connect both sides of communication media, to the signal from one node to another (2) conversion between analog and digital signals between analog and digital signals can be converted to each other: the analog signal usually through PCM pulse code modulation (Pulse Code Modulation) method to quantify parameters for digital signal network cameras that allow simulation different amplitude of the signal corresponding to different binary values, such as using 8 encoding analog signal is quantized to 2 ^ 8 = 256 orders of magnitude, the practical often take 24 or 30 coding; digital signal is generally carried out by shifting the phase of the carrier (Phase Shift) method to convert an analog signal. computers, computer LAN and MAN are using binary digital signal, the current WAN computer is actually transmitted both binary digital signals, but also converts the digital signal obtained by simulation signal. However, a more promising application is a digital signal. JUSTVOD An HD network camera network camera brand price, good as Ann (certified), network cameras provided by Shenzhen Futian District Jia as the Electronic Business Department. Futian An area as good e-business (www.szjsa.cn) Guangdong Shenzhen, surveillance cameras leaders, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In JUSTVOD An leadership with the staff warmly welcome all inquiries negotiations to create good as safe a better future.