Multichannel audio coding

Multichannel audio coding

  • CN 102,176,311 A
  • Filed: 02/28/2005
  • Published: 09/07/2011
  • Est. Priority Date: 03/01/2004
  • Status: Active Grant
First Claim
Patent Images

1. one kind is used for M coded audio channel and one group of method that one or more spatial parameters are decoded with very first time resolution, described M coded audio channel represented N voice-grade channel, wherein N said method comprising the steps of more than or equal to 2:

  • A) receive described M coded audio channel and described have very first time resolution this organize one or more spatial parameters,B) adopt in time interpolation, organize one or more spatial parameters with this that has very first time resolution from described and produce one group of one or more spatial parameter with second temporal resolution,C) draw N sound signal from described M coded audio channel, wherein each sound signal is divided into a plurality of frequency bands, and wherein each frequency band comprises one or more spectrum components, andD) from a described N sound signal and have second temporal resolution this organize one or more spatial parameters and generate multi-channel output signals,Wherein, M is more than or equal to 2,In the described N sound signal at least one is the coherent signal that at least two weighted array from described M coded audio channel draws,With second temporal resolution this organized first parameter that one or more spatial parameters comprise the amount of the uncorrelated signal that indication will mix with coherent signal, andStep d) comprises from described at least one coherent signal and obtains at least one uncorrelated signal, and be controlled at described at least one coherent signal at least one channel of described multi-channel output signal and the ratio of described at least one uncorrelated signal in response to one or more in the described spatial parameter with second temporal resolution, wherein said control is carried out according to described first parameter at least in part.

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