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

fYear

2000

fDate

2000

Firstpage

304

Lastpage

307

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ISCC.2000.860655

Filename

860655