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Adaptive time/frequency-based audio encoding and decoding apparatuses and methods

  • US 8,548,801 B2
  • Filed: 09/26/2006
  • Issued: 10/01/2013
  • Est. Priority Date: 11/08/2005
  • Status: Expired due to Fees
First Claim
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1. An adaptive time/frequency-based audio encoding apparatus, comprising:

  • a transformation &

    mode determination unit to divide an input audio signal into a plurality of frequency-domain signals and to select a time-based encoding mode or a frequency-based encoding mode for each respective frequency-domain signal;

    a time-based encoding unit, implemented by at least one processing device, to perform time-based encoding in a linear prediction coding domain by using at least a long-term prediction on a first frequency-domain signal determined to be encoded in a time-based encoding mode;

    a frequency-based encoding unit to perform frequency-based encoding in a frequency domain other than the linear prediction coding domain, on a second frequency-domain signal determined to be encoded in a frequency-based encoding mode; and

    a bitstream output unit to output encoded data, division information, and encoding mode information including the time-based encoding mode or the frequency-based encoding mode corresponding to each respective encoded frequency-domain signal.

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