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Burst-by-burst Adaptive Wideband Wireless Video Telephony

Burst-by-burst Adaptive Wideband Wireless Video Telephony
Burst-by-burst Adaptive Wideband Wireless Video Telephony
The design trade-offs of interactive wireless video systems are discussed and performance comparisons are provided both in the context of second- and third-generation wireless videophone systems. We commence our discussions by a comparative study of arbitrarily programmable, but fixed-rate videophone codecs using quarter common intermediate format (QCIF) video sequences scanned at 10 frames/s. These proprietary codecs were designed to allow direct replacement of mobile ratio voice codecs in second generation wireless systems, such as at he 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. From the range of codecs investigated, 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 2. The associated video Peak Signal-to-Noise Ratio (PSNR) was around 30 dB, while the subjective video quality can be assessed under http://www-mobile.ecs.soton.ac.uk. A range of multimode wireless transceivers were also proposed, which are characterised by Table 3. The second part of the paper is dedicated to burst-by-Burst (BbB) adaptive wireless video transceivers employing the standard H.263 codec. It is demonstrated that the proposed BbB adaptive transceivers provide an improved video performance in comparison to their statically reconfigured counterparts in the context of both wideband BbB Adaptive Quadrature Amplitude Modulation (AQAM) transceivers and the joint-detection based Code Division Multiple Access (CDMA) transceivers of the third generation systems.
215-232
Hanzo, L
66e7266f-3066-4fc0-8391-e000acce71a1
Wong, CH
c1606f45-10fa-49ce-bc7e-ade59bb670c5
Cherriman, PJ
121df054-2913-449f-8608-871352202952
Hanzo, L
66e7266f-3066-4fc0-8391-e000acce71a1
Wong, CH
c1606f45-10fa-49ce-bc7e-ade59bb670c5
Cherriman, PJ
121df054-2913-449f-8608-871352202952

Hanzo, L, Wong, CH and Cherriman, PJ (2000) Burst-by-burst Adaptive Wideband Wireless Video Telephony. Symposium on Communications and Vehicular Technology, SCVT’2000, Belgium. pp. 215-232 .

Record type: Conference or Workshop Item (Other)

Abstract

The design trade-offs of interactive wireless video systems are discussed and performance comparisons are provided both in the context of second- and third-generation wireless videophone systems. We commence our discussions by a comparative study of arbitrarily programmable, but fixed-rate videophone codecs using quarter common intermediate format (QCIF) video sequences scanned at 10 frames/s. These proprietary codecs were designed to allow direct replacement of mobile ratio voice codecs in second generation wireless systems, such as at he 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. From the range of codecs investigated, 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 2. The associated video Peak Signal-to-Noise Ratio (PSNR) was around 30 dB, while the subjective video quality can be assessed under http://www-mobile.ecs.soton.ac.uk. A range of multimode wireless transceivers were also proposed, which are characterised by Table 3. The second part of the paper is dedicated to burst-by-Burst (BbB) adaptive wireless video transceivers employing the standard H.263 codec. It is demonstrated that the proposed BbB adaptive transceivers provide an improved video performance in comparison to their statically reconfigured counterparts in the context of both wideband BbB Adaptive Quadrature Amplitude Modulation (AQAM) transceivers and the joint-detection based Code Division Multiple Access (CDMA) transceivers of the third generation systems.

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More information

Published date: July 2000
Additional Information: (Invited Plenary Lecture) Event Dates: 19 October 2000
Venue - Dates: Symposium on Communications and Vehicular Technology, SCVT’2000, Belgium, 2000-10-19
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 257115
URI: http://eprints.soton.ac.uk/id/eprint/257115
PURE UUID: 3d2556e4-5714-47b7-9666-b1319edfd338
ORCID for L Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 16 Dec 2002
Last modified: 20 Jul 2019 01:26

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