Accession Number:

ADA160878

Title:

Development of a Methodology to Test Video Codecs Used in Teleconferencing.

Descriptive Note:

Final technical information bulletin.

Corporate Author:

DELTA INFORMATION SYSTEMS INC HORSHAM PA

Personal Author(s):

Report Date:

1985-08-23

Pagination or Media Count:

53.0

Abstract:

The purpose of this report is to define a test methodology for the evaluation of motion television codecs for teleconferencing applications. The results of this evaluation will serve as a guideline for the future preparation of specifications for codecs of this type. The principle characteristics of the codecs include the following 1 utilize digital communication channels, 2 operate at a data rate of 1.544 Mbps, 3 Provide color capability, and 4 Provide motion capability. The specific objective of the tests describes is to rank the codecs tested in order of performance capability. The reason that new tests are being developed is that there are presently no agreed upon test procedures for that purpose. The tests described will utilize a specifically prepared video tape containing still and motion sequences designed specifically for the evaluation of this type of codec. These sequences will be passed through the codecs and the output recorded on video tape. The evaluation and grading of each codec will be on a subjective, comparative basis. The intent of CCIR Recommendation 500-2, Method for the subjective Assessment of the Quality of Television Pictures Vol. XI, Part 1, XVth Plenary. Keywords include Video Teleconferencing, Test Methodology, and Codecs.

Subject Categories:

  • Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE