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Encoding audio signals using precomputed silence

  • US 5,978,756 A
  • Filed: 03/28/1996
  • Issued: 11/02/1999
  • Est. Priority Date: 03/28/1996
  • Status: Expired due to Term
First Claim
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1. In an audio processing system, a method for encoding audio signals for transmission to a receiver, comprising the steps of:

  • (a) analyzing an audio stream to distinguish silent periods from non-silent periods;

    (b) encoding audio stream data for non-silent periods with a speech encoder of the audio processing system to provide encoded speech data;

    (c) for silent periods, providing, with a silence encoder of the audio processing system, one or more sets of canned encoded data corresponding to representative silent periods to provide encoded silence data representative of said silent periods, wherein the processing load imposed on a processor implementing the speech encoder and the silence encoder is reduced during silent periods;

    (d) generating an encoded bitstream for the audio stream by combining said encoded speech data with said encoded silence data; and

    (e) transmitting the encoded bitstream to the receiver.

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