×

System and method for audio coding and decoding

  • US 9,646,616 B2
  • Filed: 10/08/2014
  • Issued: 05/09/2017
  • Est. Priority Date: 04/14/2010
  • Status: Active Grant
First Claim
Patent Images

1. A method for generating an encoded audio signal, the method comprising:

  • receiving a frame comprising a time-frequency (T/F) representation of an input audio signal, the T/F representation having time slots, each time slot having subbands;

    estimating energy in subbands of the time slots;

    estimating a time variance across a first plurality of time slots for each of a second plurality of subbands;

    estimating a frequency variance of the time variance across the second plurality of subbands;

    determining a class of audio signal by comparing the frequency variance with a threshold; and

    transmitting the encoded audio signal, the encoded audio signal comprising a coded representation of the input audio signal and a control code based on the class of audio signal, wherein the encoded audio signal further comprises a representation of high-band coefficients and low-band coefficients, and wherein the control code indicates whether modification of the low-band coefficients and high-band coefficients in the time-frequency domain to correct for audio coding artifacts in post-processing should be performed.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×