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Viterbi decoder for a high definition television

  • US 5,844,945 A
  • Filed: 01/11/1995
  • Issued: 12/01/1998
  • Est. Priority Date: 04/12/1994
  • Status: Expired due to Term
First Claim
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1. A Viterbi decoder for a high definition television (HDTV) comprising:

  • metric calculating means for obtaining a difference value between a signal input to the Viterbi decoder and a branch value and adding the obtained value with to an accumulated previous metric value;

    optimal path calculating means for outputting information on a survival path for a stage and an optimal survival path within an observation section using the metric value output from said metric calculating means; and

    path transition history calculating means for determining the value to be output within an observation section by setting in- and out-pointers from the path information output from said optimal path calculating means.

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