Patent ID: 8160888
Filing Date: 2012-04-17
Classification: G10L,H04S

Abstract:
1. A decoder for generating a multi channel audio signal, the decoder comprising: a receiver for receiving a first signal comprising a first set of audio channels; an estimator for generating estimated parametric data for a second set of audio channels in response to characteristics of the first set of audio channels; the estimated parametric data relating characteristics of the second set of audio channels to characteristics of the first set of audio channels, said estimator comprising a determiner for determining first parameter data for the first set of audio channels and a mapper for mapping the first parameter data to the estimated parameter data for the second set of audio channels, wherein the first parameter data comprises at least one inter-channel level difference value for at least two audio channels of the first set of audio signals; and a spatial audio decode for decoding the first signal in response to the estimated parametric data to generate the multi-channel audio signal comprising the second set of channels.