Partial response trellis decoder for high definition television (HDTV) system
AssigneeLG Electronics Inc.
InventorsDae J. Kim, Heung S. Kwak, Ho J. Nam
Life of this patent
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Abstract
A partial response Trellis decoder that performs trellis coded modulation in a high definition television (HDTV) having a specific and detailed configuration and includes a distance mapper for calculating first, second, third and fourth Euclidean distances between the input signal and a reference value; a Viterbi decoder for Viterbi decoding the first, second, third and fourth Euclidean distances calculated by the distance mapper; a first delay for delaying and outputting the Yiterbi decoded data for each Euclidean distance; a ruler selector for selecting a ruler type signal based on the signals output by the first delay; and a slicer for slicing the selected ruler type signal and the input signal.
Claims20
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.
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 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 the first, second, third and fourth Euclidean distances calculated by said distance mapper;
- a first delay means 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 means;
- a hard decider for slicing and hard deciding said input signal;
- and
- a multiplexer for selecting and outputting one of the signals output by said hard decider.
A partial response Trellis decoder for a high definition television (HDTV, said partial response Trellis decoder receiving an input signal from which NTSC interferences has been removed and said partial Trellis decoder comprises:
- a distance mapper for calculating first, second, third and fourth Euclidean distances between said input signal and a reference value;
- a hard decider for hard deciding said input signal and for outputting the hard decision value;
- and
- a Viterbi decoder for Viterbi decoding the data output by said distance mapper and said hard decider.
Dependencies are inferred from the claim text.