A Mobile Speech, Video and Data Transceiver Scheme
A Mobile Speech, Video and Data Transceiver Scheme
The complexity, robustness, image and speech quality as well as packet multiplexing issues of a re-configurable 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 64 level quadrature amplitude modulation (QAM) combined with embedded low-complexity binary Bose-Chaudhuri-Hocquenghem (BCH) forward error correction (FEC) 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 videophone channels. The ADPCM/DCT/BCH/16-QAM and ADPCM/DCT/BCH/64-QAM schemes provide nearly unimpaired speech and image quality for channel SNRs in excess of 30 dB and 38 dB, respectively.
452-456
Hanzo, L.
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Stedman, R.
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Steele, R.
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Cheung, J.C.S.
2757d39e-5686-4e67-927b-39774cd56147
June 1994
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.
2757d39e-5686-4e67-927b-39774cd56147
Hanzo, L., Stedman, R., Steele, R. and Cheung, J.C.S.
(1994)
A Mobile Speech, Video and Data Transceiver Scheme.
of VTC'94, Stockholm,, Sweden.
07 - 11 Jun 1994.
.
Record type:
Conference or Workshop Item
(Other)
Abstract
The complexity, robustness, image and speech quality as well as packet multiplexing issues of a re-configurable 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 64 level quadrature amplitude modulation (QAM) combined with embedded low-complexity binary Bose-Chaudhuri-Hocquenghem (BCH) forward error correction (FEC) 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 videophone channels. The ADPCM/DCT/BCH/16-QAM and ADPCM/DCT/BCH/64-QAM 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-vtc-1994.pdf
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More information
Published date: June 1994
Additional Information:
Event Dates: 7-11 June 1994 Address: Stockholm , Sweeden
Venue - Dates:
of VTC'94, Stockholm,, Sweden, 1994-06-07 - 1994-06-11
Organisations:
Southampton Wireless Group
Identifiers
Local EPrints ID: 257163
URI: http://eprints.soton.ac.uk/id/eprint/257163
PURE UUID: c6c3cfd3-5db7-4340-abb4-05919a6c43eb
Catalogue record
Date deposited: 17 Jan 2003
Last modified: 18 Mar 2024 02:33
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Contributors
Author:
L. Hanzo
Author:
R. Stedman
Author:
R. Steele
Author:
J.C.S. Cheung
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