Patent ID: 9454969
Filing Date: 2016-09-27
CPC Classification: G10L,H04S

Claim Text:
1. A method for decoding M encoded audio channels representing N audio channels, where N is two or more, and a set of one or more spatial parameters having a first time resolution, the method comprising: a) receiving said M encoded audio channels and said set of spatial parameters having the first time resolution, b) employing interpolation over time to produce a set of one or more spatial parameters having a second time resolution from said set of one or more spatial parameters having the first time resolution, c) deriving N audio signals from said M encoded channels, wherein each audio signal is divided into a plurality of frequency bands, wherein each band comprises one or more spectral components, d) generating a multichannel output signal from the N audio signals and the one or more spatial parameters having the second time resolution, and e) synthesizing, by an audio reproduction device, the multichannel output signal, wherein M is two or more, at least one of said N audio signals is a correlated signal derived from a weighted combination of at least two of said M encoded audio channels, said set of spatial parameters having the first resolution includes a first parameter indicative of the amount of an uncorrelated signal to mix with a correlated signal, and step d) includes deriving at least one uncorrelated signal from said at least one correlated signal, and controlling the proportion of said at least one correlated signal to said at least one uncorrelated signal in at least one channel of said multichannel output signal in response to one or ones of said spatial parameters having the second resolution, wherein said controlling is at least partly in accordance with said first parameter.