Research And Design Of IP Network-based Video Intercom System Of Family Medical Intelligent Terminal

Family medical intelligent terminal is a new type of smart appliance, which can take high-definition video intercom, identify user, detect and transmit physiological parameters.User can simply obtain healthy living guide from remote doctor who is on line.This intercom system is to be achived high-definition video intercom function on family medical intelligent terminal. It is for IP network application and contains audio and video data acquisition module, audio and video coding module, audio and video transmission module and the audio and video playback module. Audio and video data acquisition modules are collected data from the Digital camera and Microphone. Audio and video coding module compresses audio and video data. The encoded data is transmission through the network transmission module. Finally, playback audio and video at the receiver end.This design is completed at the Windows XP system and Visual C++ software platform. Audio and video data acquisition module and playback module used VFW(Video for Windows) SDK to achieve audio and video data getting and audio and video playback. Making use of the WinSock programming technique is simple and easy to implement UDP protocol for audio and video data transmission in audio and video transmission module.at last, the paper completed video call without the server under the common IP network.The paper choosed JM10.1 as video data encoder and G.729.A as audio data encoder in audio and video coding module of video intercom system. Meanwhile, the intercom system achieved video recording and still image capturing by applying anychat SDK.Finally, the paper successfully completed the IP network-based video intercom systems of family medical intelligent terminal through all the functional parts of the system construction and commissioning. Testing process and results show that IP-based network video intercom system of family medicine intelligent terminal achieved all functions desired:video display is high-definition, speech communication is clarity and reliability, video recording and image capturing are operational. Then, it outlooked the development direction of the System.