Accession Number:

AD0648225

Title:

RECORDING AND DISPLAY OF REDUCED BANDWIDTH TV SIGNALS,

Descriptive Note:

Corporate Author:

POLYTECHNIC INST OF BROOKLYN N Y MICROWAVE RESEARCH INST

Personal Author(s):

Report Date:

1966-11-01

Pagination or Media Count:

127.0

Abstract:

The report is composed of three sections The first section deals with Bandwidth reduction of television signals using pseudo-random scanning. The effect of different disturbances encountered in a transmission channel are evaluated. In section II a system is described that was developed to record the pseudo-random scanned television signals. The system is capable of recording 200 kHz signals on a 14 inch tape running at 15 ips. The system employs unique skew and flutter compensation. A 61.44 kHz experimental recording system is described. The distortion of a pseudo-random scanned TV signal caused by flutter and skew introduced by the tape recording is analyzed theoretically. Specifically the signal-to-noise ratio is computed for a typical system, assuming the distortion can be considered to be additive random noise. In section III the bandwidth reduction for extremely slow frame rates is evaluated experimentally. A scan conversion apparatus was built to provide the necessary long storage of the image. Author

Subject Categories:

  • Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE