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Coding generic audio signals at low bitrates and low delay

  • US 9,015,038 B2
  • Filed: 10/25/2011
  • Issued: 04/21/2015
  • Est. Priority Date: 10/25/2010
  • Status: Active Grant
First Claim
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1. A mixed time-domain/frequency-domain coding device for coding an input sound signal, comprising:

  • a calculator of a time-domain excitation contribution in response to the input sound signal;

    a calculator of a cut-off frequency for the time-domain excitation contribution in response to the input sound signal;

    a filter responsive to the cut-off frequency for adjusting a frequency extent of the time-domain excitation contribution;

    a calculator of a frequency-domain excitation contribution in response to the input sound signal; and

    an adder of the filtered time-domain excitation contribution and the frequency-domain excitation contribution to form a mixed time-domain/frequency-domain excitation constituting a coded version of the input sound signal.

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