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A Mobile Speech, Video and Data Transceiver Scheme

Record type: Conference or Workshop Item (Other)

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.

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Citation

Hanzo, L., Stedman, R., Steele, R. and Cheung, J.C.S. (1994) A Mobile Speech, Video and Data Transceiver Scheme At of VTC'94, Sweden. 07 - 11 Jun 1994. , pp. 452-456.

More information

Published date: June 1994
Additional Information: Event Dates: 7-11 June 1994 Address: Stockholm , Sweeden
Venue - Dates: of VTC'94, 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 Jul 2017 09:40

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Contributors

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

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