Patent ID: 9357305
Filing Date: 2016-05-31
CPC Classification: G10L,H04R

Claim Text:
1. An apparatus for generating an enhanced downmix signal on the basis of a multi-channel microphone signal, the apparatus comprising: a spatial analyzer configured to compute a set of spatial cue parameters comprising a direction information describing a direction-of-arrival of direct sound, a direct sound power information and a diffuse sound power information, on the basis of the multi-channel microphone signal; a filter calculator for calculating enhancement filter parameters in dependence on the direction information describing the direction-of-arrival of the direct sound, in dependence on the direct sound power information and in dependence on the diffuse sound power information; and a filter for filtering the microphone signal, or a signal derived therefrom, using the enhancement filter parameters, to acquire the enhanced downmix signal; wherein the filter calculator is configured to calculate the enhancement filter parameters in dependence on direction-dependent gain factors which describe desired contributions of a direct sound component of the multi-channel microphone signal to a plurality of loudspeaker signals and in dependence on one or more downmix matrix values which describe desired contributions of a plurality of audio channels to one or more channels of the enhanced downmix signal.