APPARATUS, METHOD AND COMPUTER PROGRAMME FOR PROVIDING SET OF SPATIAL INDICATORS BASED ON MICROPHONE SIGNAL AND APPARATUS FOR PROVIDING DOUBLE-CHANNEL AUDIO SIGNAL AND SET OF SPATIAL INDICATORS

摘要

FIELD: information technology.;SUBSTANCE: apparatus for providing a set of spatial indicators associated with an upmix audio signal, having more than two channels, based on a double-channel microphone signal, comprises a signal analyser and an additional spatial information generator. The signal analyser is configured to receive component energy information and direction information based on the double-channel microphone signal such that the component energy information describes an estimate of energy of the direct sound component of the double-channel microphone signal, and such that the direction information describes an estimate of the direction from which the direct sound component of the double-channel microphone signal arrives. The additional spatial information generator is configured to compare component energy information and direction information with spatial indicator information which describes the set of spatial indicators associated with an upmix audio signal, having more than two channels.;EFFECT: providing a computation-efficient concept for obtaining spatial indicator information while keeping the sound conversion effort sufficiently low.;13 cl, 21 dwg