Apparatus for converting a digital signal.

摘要

The maximum likelihood decoder (28) comprises the Viterbi decoding unit (30) and the symbol concluding unit (29). Final N-M bit data of data of N (> M) bit unit, to which M-bit original data is converted, is supplied to the symbol concluding unit (29) as a terminal portion and other data is supplied to the Viterbi decoding unit (30), thereby being demodulated by a demodulator (37). There can be obtained a maximum likelihood decoding apparatus in which data that must be processed at high speed, such as image data or the like can be recorded and reproduced at high speed and the maximum likelihood decoding can be constructed as the completion type to effect the parallel decoding and a reproducing data demodulating apparatus using such maximum likelihood decoding apparatus. <IMAGE>