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Apparatus for deinterleaving and output-processing decoded data in a trellis decoder

  • US 6,035,428 A
  • Filed: 03/31/1998
  • Issued: 03/07/2000
  • Est. Priority Date: 03/31/1997
  • Status: Expired due to Fees
First Claim
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1. An apparatus, for use in a trellis decoder, for deinterleaving decoded symbols produced by decoding convolutionally encoded symbols which have been M symbol interleaved, and providing output data of P bits based on the deinterleaved decoded symbols, wherein each symbol contains K bits, M, K and P being positive integers, respectively, which comprises:

  • two memory groups for sequentially storing the decoded symbols in response to enable signals and producing the output data of P bits based on the stored decoded symbols, wherein the two memory groups alternately perform the storing and the producing processes;

    input control means for producing the enable signals to control the two memory groups to thereby sequentially store the decoded symbols to the two memory groups; and

    output control means for selecting one of outputs provided from the two memory groups and providing the selected output as the output data of P bits.

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