Apparatus, method and computer program for providing a set of spatial cues on the basis of a microphone signal and apparatus for providing a two-channel audio signal and a set of spatial cues

摘要

An apparatus for providing a set of spatial cues associated with an upmix audio signal having more than two channels on the basis of a two-channel microphone signal has a signal analyzer and a spatial side information generator. The signal analyzer is configured to obtain a component energy information and a direction information on the basis of the two-channel microphone signal, such that the component energy information describes estimates of energies of a direct sound component of the two-channel microphone signal and of a diffuse sound component of the two-channel microphone signal, and such that the directional information describes an estimate of a direction from which the direct sound component of the two-channel microphone signal originates. The spatial side information generator is configured to map the component energy information and the direction information onto a spatial cue information describing the set of spatial cues associated with an upmix audio signal having more than two channels.

主权项

1. An apparatus for providing a set of spatial cues associated with an upmix audio signal including more than two channels on the basis of a two-channel microphone signal, the apparatus comprising:
a signal analyzer configured to extract a component energy information and a direction information on the basis of the two-channel microphone signal, such that a first parameter of the component energy information describes estimates of energies of a direct sound component of the two-channel microphone signal and a second parameter of the component energy information describes estimates of energies of a diffuse sound component of the two-channel microphone signal, and such that a parameter of the direction information describes an estimate of a direction from which the direct sound component of the two-channel microphone signal originates; and a spatial side information generator configured to map the first and second parameters of the component energy information of the two-channel microphone signal and the parameter of the direction information of the two-channel microphone signal onto a spatial cue parameter information describing the set of spatial cues associated with the upmix audio signal including more than two channels; wherein the spatial side information generator is configured to map the estimates of the energies of the direct sound component, the estimates of the energies of the diffuse sound component, and the estimate of the direction information onto the spatial cues.