Patent ID: 9093063
Filing Date: 2015-07-28
Classification: G10L,H04S

Abstract:
1. An apparatus for extracting a direct and/or ambience signal from a downmix signal and spatial parametric information, the downmix signal and the spatial parametric information representing a multi-channel audio signal comprising more channels than the downmix signal, wherein the spatial parametric information comprises inter-channel relations of the multi-channel audio signal, the apparatus comprising: a direct/ambience estimator configured to estimate a direct level information of a direct portion of the multi-channel audio signal and/or for estimating an ambience level information of an ambient portion of the multi-channel audio signal based on the spatial parametric information; and a direct/ambience extractor configured to extract a direct signal portion and/or an ambient signal portion from the downmix signal based on the estimated direct level information of the direct portion or based on the estimated ambience level information of the ambient portion, wherein the direct/ambience extractor is configured to downmix the estimated direct level information of the direct portion or the estimated ambience level information of the ambient portion to acquire downmixed level information of the direct portion or the ambient portion and extract the direct signal portion or the ambient signal portion from the downmix signal based on the downmixed level information.