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Quadtree-Decomposed Cordless Videophones

Quadtree-Decomposed Cordless Videophones
Quadtree-Decomposed Cordless Videophones
Arbitrarily programmable, but fixed-rate quad-tree (QT) decomposed, parametrically enhanced videophone codecs using quarter common intermediate format (QCIF) video sequences are proposed as a direct replacement for mobile radio voice codecs in second generation systems, such as the Pan-European GSM, the American IS-54 and IS-95 as well as the Japanese systems. The proposed 11.36 kbps Codec 1 and the 11 kbps Codec 2 are embedded in the adaptively re-configurable wireless videophone Systems 1-4 featured in Table 3 and their video quality, bit rate, robustness and complexity issues are investigated. Coherent re-configurable 16 or 4-level pilot symbol assisted quadrature amplitude modulation (PSAQAM) is used and the system's robustness is improved by a combination of diversity and Automatic Repeat Request (ARQ) techniques. When using a bandwidth of 200 kHz, as in the PanEuropean GSM mobile radio system, the number of videophone users supported varies between 3 and 16, while the minimum required channel Signal to Noise Ratio over Gaussian and Rayleigh channels is in excess of 6 and 8 dB, respectively. The salient system features are summarised in Table 3.
218-222
Streit, J.
49bf5c3e-e995-4441-ac68-7feecb6a6f1d
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Streit, J.
49bf5c3e-e995-4441-ac68-7feecb6a6f1d
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1

Streit, J. and Hanzo, L. (1996) Quadtree-Decomposed Cordless Videophones. of VTC'96, Atlanta, USA, Georgia. 28 Apr - 01 May 1996. pp. 218-222 .

Record type: Conference or Workshop Item (Other)

Abstract

Arbitrarily programmable, but fixed-rate quad-tree (QT) decomposed, parametrically enhanced videophone codecs using quarter common intermediate format (QCIF) video sequences are proposed as a direct replacement for mobile radio voice codecs in second generation systems, such as the Pan-European GSM, the American IS-54 and IS-95 as well as the Japanese systems. The proposed 11.36 kbps Codec 1 and the 11 kbps Codec 2 are embedded in the adaptively re-configurable wireless videophone Systems 1-4 featured in Table 3 and their video quality, bit rate, robustness and complexity issues are investigated. Coherent re-configurable 16 or 4-level pilot symbol assisted quadrature amplitude modulation (PSAQAM) is used and the system's robustness is improved by a combination of diversity and Automatic Repeat Request (ARQ) techniques. When using a bandwidth of 200 kHz, as in the PanEuropean GSM mobile radio system, the number of videophone users supported varies between 3 and 16, while the minimum required channel Signal to Noise Ratio over Gaussian and Rayleigh channels is in excess of 6 and 8 dB, respectively. The salient system features are summarised in Table 3.

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More information

Published date: April 1996
Additional Information: Event Dates: 28 April - 1 May 1996 Organisation: IEEE Address: Atlanta, Georgia, USA
Venue - Dates: of VTC'96, Atlanta, USA, Georgia, 1996-04-28 - 1996-05-01
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 258134
URI: http://eprints.soton.ac.uk/id/eprint/258134
PURE UUID: 703b5e58-1e27-438e-a011-7e6c9a00fd78
ORCID for L. Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 31 Jul 2003
Last modified: 18 Mar 2024 02:33

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Contributors

Author: J. Streit
Author: L. Hanzo ORCID iD

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