H.263 Wireless Video Communication System Based On DSP

Multimedia video communication system is a hot subject in communication application field. Video information processing needs a large amount of calculation. The video communication terminal based on DSP is an optimal media. With the development of multimedia digital processing and wireless network technology, Wireless Video Communication System has become a new application trend.Currently, most video transmission application has founded on fixed public IP network interface, which is a generic single mode and makes a limited applicable range on video monitor. etc. So research on wireless multimedia video communication system of diverse mode has value in application. The thesis use internet radio mode on ISM band as theory foundation, providing multi-point design of wireless video network, which emphasis on research of wireless process terminal. The thesis has designed a DSP video transmission plan both in Ethernet and RF mode.The thesis has research on key technology of wireless video transmission system, realizes Ethernet transportation based on DSP and makes an extended research on wireless part. The main content has these as follows:Research on key technology of wireless video communication is mainly on video compression arithmetic of multimedia chip, video streaming technology and video processing platform. H.263 is used for low-rate video transportation, which is used and optimized on DSP. RTP/RTCP real-time video transportation protocol could provide reliable and traffic control of real-time multimedia video streaming. Wireless video communication terminal is a crucial part of Wireless multimedia communication system. It has function of video gather, compression and communication interface. The thesis use TI DMS642 as core equipment, using DSP/BIOS embed system to realize video encode/decode and control plan, transplanting and optimizing H.263 arithmetic.Design DSP Ethernet module, and use Network Development Kit's TCP/IP protocol stack to found a software platform for network transport. It has made RTP/RTCP protocol to control UDP data that carries H.263 streaming via IP network transporting. The thesis extends UART of DSP, and connects wireless module nRF905 via RS232, and then tests wireless data transportation.The PC provides H.263 decoder and has connected to a wireless transceiver, so it sets up a mutual communication between DSP and PC. Finally, the thesis processes an associated debug of the whole system, testing the function of each part.The thesis sets up an video data communication plan on both network and radio frequency way, which founds a basic for multi-point wireless video communication network.