Accession Number : AD0653529

Title :   LIMITING INFORMATION CONTENT OF TELEVISION SIGNAL,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Chou,Chiung-pan

Report Date : 25 JAN 1967

Pagination or Media Count : 28

Abstract : The author discusses the bandwidth compression and limiting information content of television (TV) signals. Equation is used to determine the information content of stereophonic signals, remote control signals, telemetering signals, and monochrome TV signals. As indicated the necessary TV channel bandwidth can be compressed 4 times by pseudorandom scanning, 2 times by elimination of interferences between scanning lines, and 28 times by adoption of sweeps having a variable duration. The max bandwidth compression ratio for monochrome TV signals is 320-520. The limiting information content of color TV signals can be estimated roughly. The channel bandwidth of color TV signals can be compressed by improving the random vector field structure. The bandwidth of stereo-TV signals is compressed by eliminating the interferences between pictures. The author urges that extensive studies must be made on mathematical theories to solve the information content problems, on TV signal characteristics and visual sensation of human eyes, and on the practical use of bandwidth compression methods. (Author)

Descriptors :   (*TELEVISION EQUIPMENT, *SIGNALS), VIDEO SIGNALS, BANDWIDTH, COLOR TELEVISION, TELEMETER SYSTEMS, MATHEMATICAL ANALYSIS, THEORY, CHINA

Subject Categories : Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE