Title :
A standalone video communication system for wireless applications
Author :
Ng, HonCheong ; Toh, HockLye ; Rahardja, Susanto ; Huang, Haibin ; Chen, Xiang ; Lan, Hui ; Lin, Xiao
Author_Institution :
Centre for Signal Process., Nanyang Technol. Inst., Singapore
Abstract :
This paper describes a low bit rate standalone portable video communication system developed for wireless applications. The video codec is based on H.263, and the audio codec is based on G.723.1. The transmission bandwidth is limited to 25 kHz. In order to have reasonable good video and audio quality, the source bit rate is set to 38 kbps. This includes video, audio and synchronization. The bit stream is embedded with 26 kbps for the error protection, resulted in a total of 64 kbps. A 16-QAM is used for the modulation in order to meet the bandwidth requirement. The whole system deployed three general purpose DSP for the real time implementation of video coding, audio coding, channel coding and system control. Besides, an RF module is developed for the transmission on UHF band
Keywords :
audio coding; channel coding; digital radio; digital signal processing chips; quadrature amplitude modulation; video codecs; video coding; visual communication; 16-QAM; 25 kHz; 26 kbit/s; 38 kbit/s; 64 kbit/s; G.723.1; H.263; RF module; UHF band; audio codec; audio coding; audio quality; bandwidth; bit stream; channel coding; error protection; general purpose DSP; low bit rate portable communication system; real time implementation; source bit rate; standalone video communication system; synchronization; system control; transmission bandwidth; video codec; video coding; video quality; wireless applications; wireless digital video communication; Audio coding; Bandwidth; Bit rate; Digital signal processing; Protection; Real time systems; Streaming media; Video codecs; Video coding; Wireless communication;
Conference_Titel :
Computers and Communications, 2000. Proceedings. ISCC 2000. Fifth IEEE Symposium on
Conference_Location :
Antibes-Juan les Pins
Print_ISBN :
0-7695-0722-0
DOI :
10.1109/ISCC.2000.860655
