Partial response trellis decoder for high definition television (HDTV) system

  • US RE36,980 E
  • Filed: 04/01/1998
  • Issued: 12/05/2000
  • Est. Priority Date: 04/12/1994
  • Status: Expired due to Term
First Claim
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1. A partial response Trellis decoder for a high definition television (HDTV), said partial response Trellis decoder receiving an input signal from which NTSC interference has been removed and said partial response Trellis decoder comprises:

  • a distance mapper for calculating first, second, third and fourth Euclidean distances between said input signal and a reference value;

    a Viterbi decoder for Viterbi decoding said first, second, third and fourth Euclidean distances calculated by said distance mapper;

    a first delay for delaying and outputting the Viterbi decoded data for each Euclidean distance;

    a ruler selector for selecting a ruler type signal based on the signals output by said first delay; and

    a slicer for slicing said selected ruler type signal and said input signal.

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