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Multi-Mode Wireless Videophony

Multi-Mode Wireless Videophony
Multi-Mode Wireless Videophony
A comparative study of arbitrarily programmable, but fixed-rate videophone codecs using quarter common intermediate format (QCIF) video sequences scanned at 10 frames/s is offered. These codecs were designed to allow direct replacement of mobile radio voice codecs in second generation wireless systems, such as the Pan-European GSM, the American IS-54 and IS-95 as well as the Japanese systems, operating at 13, 8, 9.6 and 6.7 kbps, respectively, although better video quality is maintained over higher-rate, 32kbps cordless systems, such as the Japanese PHS and the European DECT and CT2 systems. Best overall performance was achieved by our vector-quantised codecs, followed by the discrete cosine transformed and the quadtree-based schemes, which were characterised by the bit allocation schemes of Table 1. The associated video Peak Signal-to-Noise Ratio (PSNR) was around 30 dB, while the subjective quality can be viewed under http://www-mobile.ecs.soton.ac.uk. A range of multimode wireless transceivers were also proposed, which are characterised by Table 2.
648-658
Hanzo, L
66e7266f-3066-4fc0-8391-e000acce71a1
Streit, J
00c8766c-91a2-4ed0-a543-0549499907ec
Hanzo, L
66e7266f-3066-4fc0-8391-e000acce71a1
Streit, J
00c8766c-91a2-4ed0-a543-0549499907ec

Hanzo, L and Streit, J (1997) Multi-Mode Wireless Videophony. Journal of the Institute of Image Electronics Engineers of Japan, 26 (6), 648-658.

Record type: Article

Abstract

A comparative study of arbitrarily programmable, but fixed-rate videophone codecs using quarter common intermediate format (QCIF) video sequences scanned at 10 frames/s is offered. These codecs were designed to allow direct replacement of mobile radio voice codecs in second generation wireless systems, such as the Pan-European GSM, the American IS-54 and IS-95 as well as the Japanese systems, operating at 13, 8, 9.6 and 6.7 kbps, respectively, although better video quality is maintained over higher-rate, 32kbps cordless systems, such as the Japanese PHS and the European DECT and CT2 systems. Best overall performance was achieved by our vector-quantised codecs, followed by the discrete cosine transformed and the quadtree-based schemes, which were characterised by the bit allocation schemes of Table 1. The associated video Peak Signal-to-Noise Ratio (PSNR) was around 30 dB, while the subjective quality can be viewed under http://www-mobile.ecs.soton.ac.uk. A range of multimode wireless transceivers were also proposed, which are characterised by Table 2.

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More information

Published date: 1997
Additional Information: Invited Paper Address: Japan
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 251286
URI: http://eprints.soton.ac.uk/id/eprint/251286
PURE UUID: 7fb252be-c419-4603-80b0-5f183768188b
ORCID for L Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 25 Oct 1999
Last modified: 18 Mar 2024 02:32

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Contributors

Author: L Hanzo ORCID iD
Author: J Streit

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