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Method and Apparatus for Performing Packet Loss or Frame Erasure Concealment

  • US 20100274565A1
  • Filed: 07/02/2010
  • Published: 10/28/2010
  • Est. Priority Date: 04/19/1999
  • Status: Active Grant
First Claim
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1. A method for creating an output signal in response to received packets, said method including the steps of (a) decoding an available packet to form an audio signal segment, and (b) synthesizing an audio signal segment when a packet is unavailable, where an available packet is a packet that is received when expected and is decodable, and a packet is unavailable when it is not received when expected or is not decodable, the improvement comprising:

  • performing an overlap-add operation on audio signal segment, that is decoded by said step of decoding and which follows a number of consecutive audio signal segments Rj-1, Rj-2, . . . Rj-k, that were synthesized by said step of synthesizing, where k is 1 or more, to modify a portion of said segment Rj-1 with a portion of said segment Rj to form a modified segment, R′

    j where duration of said portion is a function of k; and

    outputting segment R′

    j.

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