Patent ID: 8325929
Filing Date: 2012-12-04
Classification: G10L,H04S

Abstract:
1. An apparatus for binaural rendering a multi-channel audio signal into a binaural output signal, the multi-channel audio signal comprising a stereo downmix signal into which a plurality of audio signals are downmixed, and side information comprising a downmix information indicating, for each audio signal, to what extent the respective audio signal has been mixed into a first channel and a second channel of the stereo downmix signal, respectively, as well as object level information of the plurality of audio signals and inter-object cross correlation information describing similarities between pairs of audio signals of the plurality of audio signals, the apparatus being configured to: compute, based on a first rendering prescription depending on the inter-object cross correlation information, the object level information, the downmix information, rendering information relating each audio signal to a virtual speaker position and HRTF parameters, a preliminary binaural signal from the first and second channels of the stereo downmix signal; generate a decorrelated signal as a perceptual equivalent to a mono downmix of the first and second channels of the stereo downmix signal, the decorrelated signal being, however, decorrelated from the mono downmix; compute, depending on a second rendering prescription depending on the inter-object cross correlation information, the object level information, the downmix information, the rendering information and the HRTF parameters, a corrective binaural signal from the decorrelated signal; and mix the preliminary binaural signal with the corrective binaural signal to acquire the binaural output signal.