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Hybrid speech coding and system

  • US 7,363,219 B2
  • Filed: 01/30/2004
  • Issued: 04/22/2008
  • Est. Priority Date: 09/22/2000
  • Status: Expired due to Term
First Claim
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1. An algebraic codebook method for distributions of P signed pulses on N positions in speech encoding, comprising:

  • (a) indexing all distributions of P signed pulses on N positions by ordering said distributions in terms of numbers of distributions of Q pulses on M positions for Q less than P, M less than or equal to N, and without regard to the sign of any pulses at the Mth position, where P, N, Q, and M are non-negative integers; and

    (b) using said indexing to provide an index to encode an excitation for an input speech frame with said excitation including a distribution of P signed pulses on N positions.

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