Patent ID: 6618338
Filing Date: 2003-09-09
Classification: G11B,H03M,H04L

Abstract:
A data reproduction control method performing quantization on a signal reproduced from a recording medium recorded with data in accordance with a given recording code, and controlling a data reproduction characteristic at a time of determining, by a maximum likelihood detection process corresponding to the recording code, reproduced data from quantized data obtained by the quantization, wherein:frequencies of levels of the quantized data are counted; a processing characteristic in the maximum likelihood detection process is adjusted based on a distribution of the counted frequencies of the levels; a trailing edge of the reproduced signal is detected based on a level change of the quantized data; the frequencies of the levels of the quantized data are counted at the detected trailing edge of the reproduced signal; and the processing characteristic in the maximum likelihood detection process for the trailing edge of the reproduced signal is adjusted based on the distribution of the counted frequencies of the levels.