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Method and apparatus for encoding and decoding convolutional codes

  • US 5,416,787 A
  • Filed: 07/29/1992
  • Issued: 05/16/1995
  • Est. Priority Date: 07/30/1991
  • Status: Expired due to Term
First Claim
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1. An apparatus for error correction encoding using convolutional codes, comprising:

  • means for classifying input signals containing a plurality of bits into a plurality of classes according to an error sensitivity of each bit;

    encoder means for applying a convolutional encoding to the input signals classified into said plurality of classes, using an identical encoding rate for all the classes, to obtain encoded signals; and

    puncture means for carrying out a puncture process for puncturing selected bits of the encoded signals, using different puncture rates for the encoded signals corresponding to different ones of said plurality of classes, to obtain error correction encoded output signals in which different classes of the input signals are encoded at different encoding rates according to the error sensitivity of each bit.

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