Viterbi equalizer and recording/reproducing device using the sam

Details Viterbi equalizer and recording/reproducing device using the sam Viterbi equalizer and recording/reproducing device using the sam

1991-05-23

1994-08-23

Beausoliel, Jr., Robert W.

Excavating

G06F 1110

Patent

active

053413865

ABSTRACT:
A viterbi equalizer includes a distributor for receiving a run length limited code and for calculating branch metrics responsive to the run length limited code. The branch metrics are related to only nodes and branches in a trellis state transition diagram based on a viterbi decoding algorithm defined for the run length limited code. The viterbi equalizer also includes a path metric calculating circuit, operatively coupled to the distributor, for generating path metrics on the basis of the branch metrics and for generating path select signals indicative of surviving paths coupling the nodes and branches. Further, the viterbi equalizer includes a path memory, operatively coupled to the path metric calculating circuit, for determining a maximum likelihood path on the basis of the path select signals output by the path metric calculating circuit.

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