The University of Southampton
University of Southampton Institutional Repository

Wireless Videophone Schemes

Wireless Videophone Schemes
Wireless Videophone Schemes
A range of 5-11.36 kbps videophone codecs are proposed and the 11.36 kbps codec 1, the 8.52 kbps Codecs 2 and the 8 kbps Codec 2a are embedded in the intelligent re-configurable systems 1-3. After sensitivity-matched binary Bose-Chaudhuri-Hocquenghem (BCH) forward error correction (FEC) coding the data rate associated with Codec 1 and Codec 2a became 20.32 kbps, while that of Codec 2 was 15.24 kbps. When using Codec 1 in System 1 and coherent pilot symbol assisted 16-level quadrature amplitude modulation (16-PSAQAM), an overall signalling rate of 9 kBd 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 18 kBd stream. In a bandwidth of 200 kHz, similarly to the Pa-European GSM mobile radio system’s speech channel, using Systems 1 and 3 for example, 126 and 8 videophone users can be supported in the 16QAM and 4QAM modes, respectively. All system features are summarised in Table 3.
692-696
Hanzo, L
66e7266f-3066-4fc0-8391-e000acce71a1
Streit, J
00c8766c-91a2-4ed0-a543-0549499907ec
Hanzo, L
66e7266f-3066-4fc0-8391-e000acce71a1
Streit, J
00c8766c-91a2-4ed0-a543-0549499907ec

Hanzo, L and Streit, J (1995) Wireless Videophone Schemes. of ICUPC'95, Tokyo, Japan. 06 - 10 Nov 1995. pp. 692-696 .

Record type: Conference or Workshop Item (Other)

Abstract

A range of 5-11.36 kbps videophone codecs are proposed and the 11.36 kbps codec 1, the 8.52 kbps Codecs 2 and the 8 kbps Codec 2a are embedded in the intelligent re-configurable systems 1-3. After sensitivity-matched binary Bose-Chaudhuri-Hocquenghem (BCH) forward error correction (FEC) coding the data rate associated with Codec 1 and Codec 2a became 20.32 kbps, while that of Codec 2 was 15.24 kbps. When using Codec 1 in System 1 and coherent pilot symbol assisted 16-level quadrature amplitude modulation (16-PSAQAM), an overall signalling rate of 9 kBd 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 18 kBd stream. In a bandwidth of 200 kHz, similarly to the Pa-European GSM mobile radio system’s speech channel, using Systems 1 and 3 for example, 126 and 8 videophone users can be supported in the 16QAM and 4QAM modes, respectively. All system features are summarised in Table 3.

Text
js-lh-icupc-1995.pdf - Other
Download (446kB)

More information

Published date: November 1995
Additional Information: Event Dates: 6-10 November 1995 Address: Tokyo, Japan
Venue - Dates: of ICUPC'95, Tokyo, Japan, 1995-11-06 - 1995-11-10
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 257117
URI: http://eprints.soton.ac.uk/id/eprint/257117
PURE UUID: 5103c730-a82c-4dd3-bacc-d8a1c09311f2
ORCID for L Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 02 Jan 2003
Last modified: 18 Mar 2024 02:33

Export record

Contributors

Author: L Hanzo ORCID iD
Author: J Streit

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.

×