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Method for speech coding, method for speech decoding and their apparatuses

DC
  • US 8,688,439 B2
  • Filed: 03/11/2013
  • Issued: 04/01/2014
  • Est. Priority Date: 12/24/1997
  • Status: Expired due to Fees
First Claim
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1. A speech decoding method for an apparatus having a decoder, the method comprising:

  • receiving, by the decoder, a coded speech signal including a gain code;

    decoding, by the decoder, a gain from the gain code;

    obtaining a time series vector with a number of samples with zero amplitude-value from an excitation codebook;

    modifying the time series vector based on the decoded gain such that the number of samples with zero amplitude-value is changed; and

    synthesizing a speech signal based on the modified time series vector.

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