Signal processing method, signal processing circuit and information recording/regenerating apparatus
AssigneeFujitsu Limited
InventorsHiroshi Uno, Kiichiro Kasai
Life of this patent
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Abstract
A partial response is utilized to record information on a medium and then regenerate the information from the medium. A regenerating system undergoes equalization including subjecting a regeneration signal from the medium to the convolution of (k−s·D) (where D is one (1) bit delay operator, and k and s are positive integer). Such convolution is performed in the regenerating system so that low-frequency band noises are reduced with an improved error rate. The information is decoded from the equalized signal by use of maximum-likelihood detection.
Claims12
A signal processing method utilizing a partial response to record information on a medium and then regenerate the information from the medium, wherein
- a regeneration signal from the medium is subjected to an equalizing process including the convolution of
- (k−s·D)
- where D:
- one (1) bit delay operator, and
- k, s:
- positive integer, k≠s.
A signal processing circuit utilizing a partial response to record information on a medium through a recording system and regenerate the information from the medium through a regenerating system, wherein
- the regenerating system includes an equalizer subjecting a regeneration signal from the medium to the convolution of
- (k−s·D)
- where D:
- one (1) bit delay operator, and
- k, s:
- positive integer, k≠s.
A signal recording/regenerating apparatus utilizing a partial response to record information on a medium through a recording system and regenerate the information from the medium through a regenerating system, wherein
- the regenerating system includes an equalizer subjecting a regeneration signal from the medium to the convolution of
- (k−s·D)
- where D:
- one (1) bit delay operator, and
- k, s:
- positive integer, k≠s.
A signal processing method utilizing a partial response to record information on a medium and then regenerate the information from the medium, wherein
- a record signal recorded on the medium is subjected to the convolution of
- (1−D)
- where D:
- one (1) bit delay operator, and wherein
- a regeneration signal from the medium is subjected to an equalizing process including the convolution of
- (k−s·D)·(1+D)n
- where D:
- one (1) bit delay operator,
- k, s:
- positive integer, and
- n:
- positive integer, except 2.
A signal processing circuit utilizing a partial response to record information on a medium through a recording system and regenerate the information from the m dium through a regenerating system, wherein
- the recording system includes a circuit unit subjecting a record signal recorded on the medium to the convolution of
- (1−D)
- where D:
- one (1) bit delay operator, and wherein
- the regenerating system includes an equalizer subjecting an output signal from the medium to the convolution of
- (k−s·D)·(1+D)n
- where D:
- one (1) bit delay operator,
- k, s:
- positive integer, and
- n:
- positive integer, except 2.
A signal recording/regenerating apparatus utilizing a partial response to record information on a medium through a recording system and regenerate the information from the medium through a regenerating system, wherein
- the recording system includes a circuit unit subjecting a record signal record d on the medium to convolution of
- (1−D)
- where D:
- one (1) bit delay operator, and wherein
- the regenerating system includes an equalizer subjecting a regeneration signal from the medium to the convolution of
- (k−s·D)·(1+D)n,
- where D:
- one (1) bit delay operator,
- k, s:
- positive integer, and
- n:
- positive integer, except 2.
Dependencies are inferred from the claim text.