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Quadtree-Based Reconfigurable Cordless Videophone Systems

Quadtree-Based Reconfigurable Cordless Videophone Systems
Quadtree-Based Reconfigurable Cordless Videophone Systems
Abstract - Arbitrarily programmable, but fixed-rate quadtree (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 corresponding bit rates are 13, 8, 9.6 and 6.7 kb/s, respectively. As an example, the proposed 11.36 kb/s prototype Codec 1 and the 11 kb/s Codee 2 are embedded in the adaptively reconfigurable wireless videophone Systems 1-4 featured in Table IV and their video quality, bit rate, robustness, and complexity Issues are investigated. Coherent reconfigurable 16 or four-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 Pan-European GSM mobile radio system, the number of videophone users supported varies between three and 16, while the minimum required channel signal to noise ratio over Gausslan and Rayleigh channels is in excess of 6 and 8 dB, respectively, assuming a noise-limited, rather than interference-limited scenario. The salient system features are summarized in Table 1V.
225-237
Streit, J
00c8766c-91a2-4ed0-a543-0549499907ec
Hanzo, L
66e7266f-3066-4fc0-8391-e000acce71a1
Streit, J
00c8766c-91a2-4ed0-a543-0549499907ec
Hanzo, L
66e7266f-3066-4fc0-8391-e000acce71a1

Streit, J and Hanzo, L (1996) Quadtree-Based Reconfigurable Cordless Videophone Systems. IEEE Transactions on Circuits and Systems for Video Technology, 6 (2), 225-237.

Record type: Article

Abstract

Abstract - Arbitrarily programmable, but fixed-rate quadtree (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 corresponding bit rates are 13, 8, 9.6 and 6.7 kb/s, respectively. As an example, the proposed 11.36 kb/s prototype Codec 1 and the 11 kb/s Codee 2 are embedded in the adaptively reconfigurable wireless videophone Systems 1-4 featured in Table IV and their video quality, bit rate, robustness, and complexity Issues are investigated. Coherent reconfigurable 16 or four-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 Pan-European GSM mobile radio system, the number of videophone users supported varies between three and 16, while the minimum required channel signal to noise ratio over Gausslan and Rayleigh channels is in excess of 6 and 8 dB, respectively, assuming a noise-limited, rather than interference-limited scenario. The salient system features are summarized in Table 1V.

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Published date: April 1996
Organisations: Southampton Wireless Group

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Local EPrints ID: 251360
URI: http://eprints.soton.ac.uk/id/eprint/251360
PURE UUID: 9d9b0a72-7070-4b02-8859-1dc4ff9ecb51
ORCID for L Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

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Date deposited: 03 Apr 2001
Last modified: 18 Mar 2024 02:32

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Contributors

Author: J Streit
Author: L Hanzo ORCID iD

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