INFORMATION REPLAY DEVICE, INFORMATION REPLAY METHOD, INFORMATION STORAGE DEVICE, AND INFORMATION STORAGE METHOD

摘要

A modulation method has a high encoding rate for generating a pattern having a lower limit for the number of successive pixels in a spatial light modulator. An information recording device includes: an encoding unit that performs error correction encoding of input data; an interleaving unit that switches the output sequence of the error correction encoding unit; and an modulation unit that performs RLL modulation of the output of the interleaving unit on the basis of an RLL modulation trellis. A corresponding information reproducing device includes: a demodulation unit that uses a posteriori probability decoding based on the RLL modulation trellis, to perform RLL demodulation for reproducing recorded information; a deinterleaving unit that reverses the sequence switching; and a decoding unit that performs error correction code decoding using a posteriori probability decoding on the basis of the error correction encoding on the output of the deinterleaving unit.

主权项

1. An information reproducing device for reproducing a recording medium recording information,
the recording medium recording the information by an information recording device having: an error correction encoding unit subjecting input data to error correction encoding; an interleaving unit rearranging a sequence of output of the error correction encoding unit; and an RLL modulating unit subjecting output of the interleaving unit to RLL modulation based on an RLL modulation trellis, the information reproducing device comprising: an RLL demodulating unit subjecting a reproducing signal of the recorded information to RLL demodulation by posterior probability decoding based on the RLL modulation trellis; a deinterleaving unit subjecting output of the RLL demodulating unit to undoing of the rearrangement of the sequence at the interleaving unit; and an error-correction-code decoding unit subjecting output of the deinterleaving unit to error-correction-code decoding by posterior probability decoding based on the error correction encoding.