Apparatus for correcting asymmetry of reproduction signals and method therefor
AssigneeSamsung Electronics Co., Ltd.
InventorsYong-Kwang Won, Jae-Seong Shim
Life of this patent
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Abstract
An apparatus for correcting asymmetry existing in a reproduction signal corrects the asymmetry by signal-processing the reproduction signal from an optical disk in digital form. The asymmetry correction apparatus changes the threshold values for counting the sign bits of the reproduction signal and the asymmetry correction values although discontinuous intervals exist on the optical disc, thereby providing an effect of easily varying an adaptive speed with respect to the discontinuous signal.
Claims43
A reproduction signal asymmetry correction apparatus for correcting asymmetry existing in a reproduction signal to be reproduced from an optical disc, the asymmetry correction apparatus comprising:
- a signal converter which converts the reproduction signal to a digital converted signal;
- an adder unit which adds the digital converted signal and a feedback asymmetry correction signal and, in response, outputs an added signal as an asymmetry corrected signal;
- a counter unit which performs a counting operation based on the added signal output from said adder unit, and in response outputs an asymmetry correction control signal to control asymmetry correction;
- and
- an asymmetry corrector which adjusts the feedback asymmetry correction signal according to the asymmetry correction control signal.
An apparatus for correcting asymmetry of an optical disk digital reproduction signal, comprising:
- a first circuit which adds the digital reproduction signal to a digital offset signal and outputs a digital asymmetry corrected signal;
- a second circuit which adjusts the digital offset signal based on a sign bit history of the digital asymmetry corrected signal.
An apparatus for correcting asymmetry of an optical disk digital reproduction signal, comprising:
- a first circuit which adds the digital reproduction signal and a digital offset signal and outputs a digital asymmetry corrected signal and a digital signal derived from the asymmetry corrected signal;
- a second circuit which adjusts the digital offset signal based on a sign bit history of the derived digital signal.
A method of correcting asymmetry of an optical disk digital reproduction signal, comprising:
- adding the digital reproduction signal to a digital offset signal and outputting a digital corrected asymmetry signal;
- and
- adjusting the digital offset signal based on a sign bit history of a digital signal derived from the digital corrected asymmetry signal.
Dependencies are inferred from the claim text.