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System and method for automatic identification of speech coding scheme

  • US 8,959,025 B2
  • Filed: 04/28/2011
  • Issued: 02/17/2015
  • Est. Priority Date: 04/28/2010
  • Status: Active Grant
First Claim
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1. A method for speech decoding, comprising:

  • accepting communication packets that carry encoded speech, which was encoded in accordance with a speech coding scheme whose identity is not accessibly identified in the communication packets, wherein accepting the communication packets comprises accepting with each packet a respective time stamp indicating a reception time of the packet;

    using a processor, processing the encoded speech so as to automatically identify the speech coding scheme that was used to encode the speech;

    decoding the encoded speech using the identified speech coding scheme, wherein processing the encoded speech comprises decoding the encoded speech in accordance with the two or more possible speech coding schemes, so as to produce two or more respective output streams; and

    deducing the identity of the speech coding scheme responsively to the output streams, wherein deducing the identity of the speech coding scheme comprises reconstructing occurrence times of speech activity in the output streams and matching the reconstructed occurrence times with the respective time stamps.

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