Apparatus for converting a digital signal

Details Apparatus for converting a digital signal Apparatus for converting a digital signal

1993-02-23

1994-10-18

Beausoliel, Jr., Robert W.

Excavating

371 55, 371 43, 341 94, 341 59, 341107, G06F 1100

Patent

active

053575245

ABSTRACT:
A maximum likelihood decoder (28) comprises a Viterbi decoding unit (30) and a 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). A maximum likelihood decoding apparatus is provided in which image data or the like can be recorded and reproduced at high speed and maximum likelihood parallel decoding is effected. A reproducing data demodulating apparatus using such maximum likelihood decoding apparatus is also provided.

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IEEE Communication Magazine vol. 23, No. 2, Feb. 1985, Piscataway, N.J., US pp. 7-15 J. B. H. Peek `Communications Aspects of the Compact Disc Digital Audio System` *p. 8, right col., line 1-p. 8, right col., line 47*.
Patent Abstracts of Japan, vol. 13, No. 412 (P-932) (3760) Sep. 12, 1989.
Elektor Electronics vol. 14, No. 157, Jun. 1988, Canterbury GB pp. 14-18 Anon. `Philips-Sony digital Audio Interface` *p. 14, col. 3, line 5-p. 16, col. 2, line 19; FIGS. 1,2*.
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Patent Abstracts of Japan vol. 16, No. 130 (E-1184) Apr. 2, 1992.

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