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A wireless multimedia system

Hanzo, L., Stedman, R., Steele, R. and Cheung, J. C. S (1995) A wireless multimedia system At Proc. of 2nd International Workshop on Mobile Multimedia Communications, United Kingdom. 11 - 14 Apr 1995. , 1.6-1.8.

Record type: Conference or Workshop Item (Paper)

Abstract

The complexity, robustness, image and speech quality as well as packet multiplexing issues of a reconfigurable multi-media mobile communicator are addressed. The proposed moderate complexity motion-compensated Discrete Cosine Transform (DCT) based image communicator provides an image peak signal-to-noise ratio (PSNR) of 38 dB at an average bit rate of about 25 kbits/s. The speech codec used is a low-complexity 32 kbit/s CCITT G721 standard scheme. Bandwidth efficient 16 or 64level quadrature amplitude modulation (QAM) combined with embedded low-complexity binary Bose-Chaudhuri-Hocquenghem (BCH) forward error correction coding is deployed. The 20-slot packet reservation multiple access (PRMA) scheme used supports an extra 2.4 kbit/s low-rate data channel for each speech user, in addition to providing 5-6 video-phone channels. The ADPCM/DCT/BCH/16-QAM as well as 64QAM schemes provide nearly unimpaired speech and image quality for channel SNRs in excess of 30 dB and 38 dB, respectively.

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More information

Published date: April 1995
Additional Information: MoMuc-2 Event Dates: 11-14 April 1995 Address: Bristol, UK
Venue - Dates: Proc. of 2nd International Workshop on Mobile Multimedia Communications, United Kingdom, 1995-04-11 - 1995-04-14
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 251352
URI: http://eprints.soton.ac.uk/id/eprint/251352
PURE UUID: 172b5b87-bccd-4827-a4f3-1eb5dbb00c58

Catalogue record

Date deposited: 28 Oct 1999
Last modified: 18 Jul 2017 10:10

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Contributors

Author: L. Hanzo
Author: R. Stedman
Author: R. Steele
Author: J. C. S Cheung

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