If the ordinary analog surveillance camera needs to be transmitted through the network, it needs to be equipped with a network encoder, which has the same function as the network camera.

Network video codec refers to a program or device that can compress or decompress digital video. Usually this kind of compression belongs to lossy data compression. Historically, video signals were stored on magnetic tape in analog form. With the appearance and entering the market of optical discs, audio signals are stored in digital form, and video signals are also in digital format, and some related technologies have also developed.

Functional characteristics of network video encoder

1. high definition and low bit rate: the most advanced video compression standard H.264-HP(High-Profile) is adopted for coding, which realizes the high definition and low bit rate coding transmission of VGA signals;

2. Support the setting of network access modes such as DHCP, PPPoE and fixed IP;

3. Full interface support, supporting input sources such as SDI, HDMI, VGA and CVBS, and automatically identifying various input signals;

4. Support SDI/HDMI embedded audio input, linear two-channel stereo audio input and audio gain function of audio input, which can increase or decrease the volume;

5. Support the adjustment of video brightness, contrast, definition and other parameters, video flip, mirror image and other special effects, video and audio rate adjustment, video can be adjusted from 100kpbs to 20Mbps, audio can be adjusted from 32k, 64k, 128k, 256k;

6. Support unicast, multicast and broadcast transmission, support streaming media protocols such as UDP, RTSP, RTMP, HTTP, TS, etc., and directly push the live stream to streaming media servers such as Flash Media Server, Okur Media Server, RED5, etc., and watch it through players such as Windows Media Player, Flash Player, VLC, etc.

7. The system adopts high-performance DSP processing chip, which has high coding efficiency and transmission efficiency, good real-time, good synchronization of video and audio, and the delay is less than 300ms；;

8. Support transparent data transmission (RS232/RS485) and standard pan-tilt control protocol, which can meet various applications;

9. The output video resolution can be customized, which supports the simultaneous output of network video streams with three different resolutions, three different code rates and three different protocols to meet the network requirements under different conditions;

10. Provide special decoding plug-ins, support http access to decode audio and video streams with low delay, and allow clients to record live streams and set recording tasks.

1 1. provides the client SDK, which can meet various requirements of client decoding, recording and pan/tilt control;

12. Equipped with a front LCD panel, you can control the equipment through the front panel of the equipment, or you can directly access HT900 1 in any networked computer through a browser to control the encoder;

13. Perfect log information query, which can query user access, signal source status, stream publishing status and other information;

14. Built-in AMS+ streaming media service software can realize rtsp and rtmp client access and meet various forms of access such as mobile phones, set-top boxes, tablet computers and PCs;

15. Support online upgrade and online maintenance.