Video transmission with reduced information flow. System with source coding for transmission of color video signals in accordance with the CCIR 625 line standard
Abstract
Bit rate reduction of a color television signal by irrelevancy and redundancy reduction techniques to allow its transmission over a third hierarchy channel of a PCM network was studied. It is noted that the digital source encoding should comply with the CCIR 625 line standard and not noticably influence the picture quality. The proposed solution consists of: (1) a four bit DPCM for each of the television signal components; (2) sub-Nyquist sampling frequency for the luminance signal with harmonic ratio to the chrominance sampling frequencies; and (3) adaptive quantizing as well as intra and interframe filtering of the chrominance signals.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- December 1980
- Bibcode:
- 1980STIN...8133398H
- Keywords:
-
- Coding;
- Color Television;
- Digital Television;
- Line Spectra;
- Television Transmission;
- Delta Modulation;
- Nyquist Frequencies;
- Pulse Code Modulation;
- Video Communication;
- Communications and Radar