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Quadtree-Decomposed Cordless Videophones

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

Record type: Conference or Workshop Item (Other)


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


Local EPrints ID: 258134
PURE UUID: 703b5e58-1e27-438e-a011-7e6c9a00fd78

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Date deposited: 31 Jul 2003
Last modified: 18 Jul 2017 09:35

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Author: J. Streit
Author: L. Hanzo

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