Audio providing apparatus and audio providing method
An audio providing apparatus and method are provided. The audio providing apparatus includes: an object renderer configured to render an object audio signal based on geometric information regarding the object audio signal; a channel renderer configured to render an audio signal having a first channel number into an audio signal having a second channel number; and a mixer configured to mix the rendered object audio signal with the audio signal having the second channel number.
1. An audio providing apparatus comprising:
an object renderer configured to convert an object audio signal into object-channel signals based on geometric information of an audio object and an output layout;
a channel renderer configured to convert a plurality of input channel signals into a plurality of output channel signals based on an input layout and the output layout; and
a mixer configured to mix the object-channel signals with the plurality of output channel signals,
wherein the channel renderer is configured to align a difference in phase between correlated input channel signals among the plurality of input channel signals and downmix the phase-aligned correlated input channel signals.
2. An audio providing method comprising:
converting an object audio signal into object-channel signals based on geometric information of an audio object and an output layout;
converting a plurality of input channel signals into a plurality of output channel signals based on an input layout and the output layout; and
mixing the object-channel signals with the plurality of output signals,
wherein the converting of the plurality of input channel signals comprising aligning a difference in phase between correlated input channel signals among the plurality of input channel signals and downmixing the phase-aligned correlated input channel signals.
3. The audio providing apparatus of claim 1 , wherein the object renderer comprises:
a geometric information analyzer configured to convert the geometric information of the audio object into three-dimensional (3D) coordinate information;
a distance controller configured to generate distance control information, based on the 3D coordinate information;
a localizer configured to generate localization information for localizing the object audio signal, based on the 3D coordinate information; and
a renderer configured to render the object audio signal, based on the generated distance control information, and the generated localization information.
4. The audio providing apparatus of claim 3 ,
wherein the distance controller is configured to acquire a distance gain of the object audio signal.
5. The audio providing apparatus of claim 1 ,
wherein the object renderer is configured to acquire a panning gain for localizing the object audio signal according to the output layout.
6. The audio providing apparatus of claim 1 ,
wherein the channel renderer is configured to, when the input layout is a 3D layout, down-mix the plurality of input channel signals to the plurality of output channel signals.
7. The audio providing apparatus of claim 1 ,
wherein the plurality of input channel signals comprise information for determining whether to perform virtual 3D rendering on a specific frame.
8. The audio providing apparatus of claim 1 ,
wherein the object audio signal comprises at least one of an identification (ID) and type information regarding the object audio signal.
9. The audio providing apparatus of claim 1 ,
wherein the geometric information of the audio object includes at least one of azimuth information, elevation information, distance information and gain information.