Patent ID: 6574290
Filing Date: 2003-06-03
Classification: G11B

Abstract:
A digital information reproducing apparatus in which a digital reproduction signal that is reproduced from a recording media, and that is constructed by Partial Response encoded signal portions each having a predetermined data amount is decoded by maximum likelihood decoding, comprising:equalizing means for equalizing said digital reproduction signal by predetermined equalizing characteristics; clock forming means for forming a first clock signal on the basis of an output of said equalizing means; A/D converting means for A/D (analog/digital) converting said digital reproduction signal by said first clock signal; time base decompressing means for performing a predetermined time base decompression to an output of said A/D converting means every said signal portion by said first clock signal and a second clock signal which is supplied separately from said first clock signal and has a lower frequency than that of said first clock signal; maximum likelihood decoding means for outputting decoding data by performing a maximum likelihood decoding process to an output of said time base decompressing means; and time base compressing means for performing a predetermined time base compression to the decoding data of an output of said maximum likelihood decoding means.