Patent ID: 7974713
Filing Date: 2011-07-05
Classification: G10L,H04S

Abstract:
1. Decoder for generating a multi-channel output signal based on a base signal derived from an original multi-channel signal having one or more channels, the number of channels of the base signal being smaller than the number of channels of the original multi-channel signal, the base signal having a frame, the frame comprising sampling values having a high resolution, and based on a wave form parameter representation representing a wave form of an intermediate resolution representation of a selected original channel of the original multi-channel signal, the wave form parameter representation including a sequence of intermediate wave form parameters having an intermediate time resolution lower than the high time resolution of the sampling values and higher than a low time resolution defined by a frame repetition rate, comprising: an upmixer for generating a plurality of upmixed channels having a time resolution higher than the intermediate resolution and for deriving an intermediate resolution representation of the base signal used to generate the upmixed channels; and a shaper for deriving a reference wave form parameter representation of the intermediate resolution representation of the base signal and for shaping a selected upmixed channel using the reference wave form parameter representation and the intermediate waveform parameters of the selected original channel corresponding to the selected upmixed channel.