Pilot-tone noise-reduction system using quantised control signals
作者:
G.R.Hoffman,
J.K.Birtwistle,
期刊:
IEE Journal on Electronic Circuits and Systems
(IET Available online 1977)
卷期:
Volume 1,
issue 3
页码: 95-98
年代: 1977
DOI:10.1049/ij-ecs.1977.0010
出版商: IEE
数据来源: IET
摘要:
A preliminary investigation has been made of a multiband noise-reduction system which uses a time-shared frequency-modulated narrow-band pilot tone. Signal-path delay allows anticipation of the control signal, and enables transient distortion to be eliminated. Discrete-level encoding is shown to have several important advantages, and, in the system described, the compression range is 24 dB in 6 dB steps. Crosstalk between the signal bands is minimised by dynamic adjustment of the filter bandwidths.
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