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Variable-length code determining device and variable-length code decoding method

  • US 7,924,179 B2
  • Filed: 03/15/2007
  • Issued: 04/12/2011
  • Est. Priority Date: 03/23/2006
  • Status: Expired due to Fees
First Claim
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1. A variable-length code decoding device that decodes variable-length encoded codeword using prefix included in the codeword, comprising:

  • a unit that stores a prefix common portion common to a plurality of prefixes used for decoding, a prefix individual portion except the prefix common portion in each prefix, and an input bit sequence including an unknown codeword of variable-length code; and

    a prefix identification unit that determines which prefix among a plurality of prefixes is included or not in the input bit sequence stored in said storage unit, said plurality of prefixes being generated from each prefix common portion and a plurality of prefix individual portions corresponding to the prefix common portion concerned, said prefix common portion and said prefix individual portions being stored in said storage unit.

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