Wireless videophone schemes

Author

Streit, J. ; Hanzo, L.

Author_Institution

Dept. of Electron. & Comput. Sci., Southampton Univ., UK

fYear

1995

Firstpage

692

Lastpage

696

Abstract

A range of 5-11.36 kbps videophone codecs are proposed and the 11.36 kbps codec 1, the 8.52 kbps codec 2 and the 8 kbps codec 2a are embedded in the intelligent re-configurable systems 1-3. After sensitivity-matched binary Bose-Chaudhuri-Hocquenghem (BCH) forward error correction (FEC) coding the data rate associated with codec 1 and codec 2a became 20.32 kbps, while that of codec 2 was 15.24 kbps. When using codec 1 in system 1 and coherent pilot symbol assisted 16-level quadrature amplitude modulation (16-PSAQAM), an overall signalling rate of 9 kBd was yielded. Over lower quality channels the 4QAM mode of operation had to be invoked, which required twice as many time slots to accommodate the resulting 18 kBd stream. In a bandwidth of 200 kHz, similarly to the Pan-European GSM mobile radio system´s speech channel, using systems 1 and 3 for example, 16 and 8 videophone users can be supported in the 16 QAM and 4QAM modes, respectively

Keywords

BCH codes; channel coding; error correction codes; forward error correction; land mobile radio; multimedia communication; quadrature amplitude modulation; video codecs; video coding; videotelephony; 15.24 kbit/s; 16-PSAQAM; 20.32 kbit/s; 200 kHz; 4QAM mode; 5 to 11.36 kbit/s; Bose-Chaudhuri-Hocquenghem coding; Pan-European GSM mobile radio system; coherent pilot symbol assisted 16-level quadrature amplitude modulation; data rate; forward error correction; intelligent re-configurable systems; sensitivity-matched binary BCH FEC coding; signalling rate; speech channel; videophone codecs; wireless videophone schemes; Bandwidth; Codecs; Forward error correction; GSM; Intelligent systems; Land mobile radio; Quadrature amplitude modulation; Speech; Streaming media; Wireless sensor networks;

fLanguage

English

Publisher

ieee

Conference_Titel

Universal Personal Communications. 1995. Record., 1995 Fourth IEEE International Conference on

Conference_Location

Tokyo

Print_ISBN

0-7803-2955-4

Type

conf

DOI

10.1109/ICUPC.1995.497098

Filename

497098