Multichannel audio decoder using residual signal based adjustment of uncorrelated signal contribution, multichannel audio encoder, method and computer program

摘要

Problem to be solved: to provide a more advanced concept for efficient coding and decoding of multichannel audio signals.A multi-channel audio decoder that provides at least two output audio signals based on the coded representation performs a weighted combination of the downmix signal and the uncorrelated signal and the residual signal to obtain one of the output audio signals; The weight describing the contribution of the uncorrelated signal in the weighted coupling is determined in accordance with the residual signal.A multi-channel audio encoder that provides a coding representation of a multichannel audio signal acquires a downmix signal based on a multi-channel audio signal A parameter for describing the dependence of the channel of a multi-channel audio signal is provided to provide a residual signal.The multi-channel audio encoder changes the amount of residual signal included in the coding expression in accordance with the multi-channel audio signal.Diagram