Patent ID: 6757863
Filing Date: 2004-06-29
Classification: G11B,H03M

Abstract:
A read channel circuit for decoding a playback signal received from a prescribed transmission path, comprising:a slice level signal generator configured to generate a reference slice level signal and a plurality of slice level signals which are different from the reference slice level signal; a comparator configured to convert the playback signal into a plurality of binary signals synchronized with a channel clock on the basis of each of the plurality of slice level signals generated; a phase distance measurement unit configured to select two binary signals from the plurality of binary signals and measure a phase distance which represents the number of edges in a prescribed clock between the edges of the two binary signals selected; an inverted edge detector configured to detect the polarity of an inverted edge of a reference binary signal binarized in accordance with the reference slice level signal among the plurality of binary signals; and an error corrector configured to generate an error correction signal to the playback signal on the basis of the phase distance measured and the polarity of the inverted edge of the reference binary signal detected to perform error correction on the playback signal.