DC coefficient restoration in transform image coding
作者:
W.K.Cham,
R.J.Clarke,
期刊:
IEE Proceedings F (Communications, Radar and Signal Processing)
(IET Available online 1984)
卷期:
Volume 131,
issue 7
页码: 709-713
年代: 1984
DOI:10.1049/ip-f-1.1984.0106
出版商: IEE
数据来源: IET
摘要:
In a transform coding system, a large number of bits have to be allocated to high-energy DC coefficients for both fine quantisation and good channel error immunity. Three schemes are proposed, in which the DC coefficients are not transmitted, but estimated at the receiver. This allows a reduction in bit rate, as well as the possibility of eliminating the serious effect of channel errors on those coefficients.
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