Accession Number : ADA319874

Title :   Video Teleconferencing Advanced Coding Techniques.

Descriptive Note : Final rept.,

Corporate Author : DELTA INFORMATION SYSTEMS INC HORSHAM PA

Personal Author(s) : Rekstad, Gary

PDF Url : ADA319874

Report Date : 13 DEC 1994

Pagination or Media Count : 98

Abstract : The purpose of this study is to examine all advanced video coding techniques and determine which, if any, of the algorithms may yield significant enhancement to the ITU H. 261 coding standard. The initial step in the study called for the preparation of an overview of advanced video coding techniques which is included. As part of this overview four advanced video coding systems were identified to be worthy of detailed study; vector quantization, wavelets, fractals, and object based coding. In order to obtain direct information on the performance of these techniques, commercial software packages for three coding systems DCT/JPEG, wavelet, fractal was obtained, and a comparative analysis was performed using typical teleconferencing scenes. Although this study is performed for intraframe coding the results are somewhat extensible to the interframe domain. As one part of this project, a survey of commercially available advanced video compression systems was performed. The results of the survey are included. Finally overall conclusions and a bibliography are also provided.

Descriptors :   *CODING, *TELECOMMUNICATIONS, *CONFERENCING(COMMUNICATIONS), COMPRESSION, COMPUTER PROGRAMS, ALGORITHMS, FRACTALS, BIBLIOGRAPHIES, SURVEYS, VECTOR ANALYSIS, QUANTIZATION, VIDEO SIGNALS.

Subject Categories : Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE