Quadtree-Decomposed Cordless Videophones


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

This is the latest version of this item.

Download

[img] PDF
Download (504Kb)

Description/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.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Additional Information: Event Dates: 28 April - 1 May 1996 Organisation: IEEE Address: Atlanta, Georgia, USA
Divisions: Faculty of Physical Sciences and Engineering > Electronics and Computer Science > Comms, Signal Processing & Control
ePrint ID: 258134
Date Deposited: 31 Jul 2003
Last Modified: 27 Mar 2014 20:00
Further Information:Google Scholar
ISI Citation Count:0
URI: http://eprints.soton.ac.uk/id/eprint/258134

Available Versions of this Item

  • Quadtree-Decomposed Cordless Videophones. (deposited 31 Jul 2003) [Currently Displayed]

Actions (login required)

View Item View Item

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