Bandwidth compression of digital colour-television signals using block-adaptive d.p.c.m.
作者:
H.Gharavi,
期刊:
IEE Proceedings F (Communications, Radar and Signal Processing)
(IET Available online 1980)
卷期:
Volume 127,
issue 5
页码: 405-409
年代: 1980
DOI:10.1049/ip-f-1.1980.0057
出版商: IEE
数据来源: IET
摘要:
This paper describes an adaptive algorithm which is capable of composite coding of broadcast-quality colour-television signals at a low bit rate. The technique involves block-adaptive predictors and block-adaptive variable-length and fixed-length quantisers. The adaptation algorithm has been extended to work at any desirable sampling frequency. As a result the low bit rate is obtained by a reduction of signal redundancy with regards to the statistical variation of each block of incoming samples. A bit-rate of only 28.34 Mb/s is obtained for a Pal colour-bar signal yielding a 50dB s.n.r. at a sampling frequency of twice the subcarrier frequency (sub-Nyquist).
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