A wireless multimedia system
A wireless multimedia system
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.
1.6-1.8
Hanzo, L.
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Stedman, R.
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Steele, R.
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Cheung, J. C. S
a5fdf279-74df-4264-81ff-a83245918b42
April 1995
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Stedman, R.
b9d5c92c-5129-4376-8d78-36f63a3c2e90
Steele, R.
7b1e6d15-a296-43bc-8ff2-37fbeb71b0ae
Cheung, J. C. S
a5fdf279-74df-4264-81ff-a83245918b42
Hanzo, L., Stedman, R., Steele, R. and Cheung, J. C. S
(1995)
A wireless multimedia system.
Proc. of 2nd International Workshop on Mobile Multimedia Communications, Bristol University, United Kingdom.
11 - 14 Apr 1995.
.
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.
Text
lh-rs-rs-jcsc-MoMuc-1995.pdf
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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, Bristol University, 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 Mar 2024 02:32
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Contributors
Author:
L. Hanzo
Author:
R. Stedman
Author:
R. Steele
Author:
J. C. S Cheung
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