The University of Southampton
University of Southampton Institutional Repository

Vector-quantised Cordless Videophone Transceivers

Record type: Conference or Workshop Item (Other)

A variety of adaptively re-configurable wireless videophone transceivers are proposed and their video quality, bit rate, robustness and complexity issues are analysed. A suite of fixed but arbitrarily programmable low-rate, percepturall weighted vector quantised (VQ) codecs with and without run-length compression (RLC) are contrived for quarter common intermediate format (QCIF) videophone sequences. The 11.36 kbps Codec 1 is BCH(127,71,9) coded to a rate of 20.32 kbps and this arrangement is comparatively studied along with the 8 kbps Codec 2 and BCH(127,50,13) scheme, which has the same 20.32 kbps overall rate. The source-sensitivity matched Systems 1-6 characterised in Table 3 were contrived to comparatively study the range of system design options. For example, using Codec 1 in System 1 and coherent pilot symbol assisted 16-level quadrature amplitude modulation (16-PSQAM), an overall signalling rate of 9kBd was yielded. Over lower quality channels the 4QAM mode of operation had to be invoked, which required twice as many time slots to accommodate the resulting 18kBd stream. The robustness of Systems 2,3,4 and 6 was increased using Automatic Repeat Requests (ARQ), inevitably reducing the number of users supported, which was between 6 and 16. In a band-width of 200kHz, similarly to the Pan European GSM mobile radio systems's speech channel, using Systems 1, 3, 4 or 5 for example, 16 and 8 videophone users can be supported in the 16QAM and 4QAM modes, respectively. The basic system characteristics are highlighted in Table 3.

PDF js-lh-globecomm-1996.pdf - Other
Download (580kB)

Citation

Streit, J and Hanzo, L (1996) Vector-quantised Cordless Videophone Transceivers At of Globecom'96, United Kingdom. 18 - 22 Nov 1996. , pp. 808-812.

More information

Published date: November 1996
Additional Information: Event Dates: 18-22 November 1996 Organisation: Globecom Address: Queen Elizabeth II Conference Centre, London
Venue - Dates: of Globecom'96, United Kingdom, 1996-11-18 - 1996-11-22
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 257067
URI: http://eprints.soton.ac.uk/id/eprint/257067
PURE UUID: 335e2021-1d67-4a19-af8a-e784f15d6731

Catalogue record

Date deposited: 11 Dec 2002
Last modified: 18 Jul 2017 09:42

Export record

Contributors

Author: J Streit
Author: L Hanzo

University divisions


Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×