An interpolation circuit for interpolating error data blocks generated in a sigma modulated data stream, a reproducing apparatus or recording apparatus employing an interpolation circuit, and an interpolation method

摘要

A recording and / or reproducing apparatus employing an interpolation circuit and an interpolation circuit is disclosed. The interpolation circuit calculates the average value of the data located upstream and downstream of the bad data block generated in the data string by the FIR filter having the preset coefficient value and calculates the data to be interpolated from the average value. The interpolation circuit also calculates the average value of the data including the bad data area using the FIR filter and calculates the difference from the data to be interpolated to estimate the array pattern of the bad data area. The interpolation circuit then determines the optimal arrangement in the estimated array pattern and replaces the bad data with the optimal arrangement to recover the bad data.