Method and apparatus for encoding and decoding 3-dimensional audio signal
A method of encoding a multi-channel 3-dimensional (3D) audio signal mixed with a multi-channel 3D object signal is provided. The method includes: obtaining a location parameter indicating a virtual location of the multi-channel 3D object signal on a multi-channel speaker layout based on a gain value of the multi-channel 3D object signal for each channel; and encoding the multi-channel 3D audio signal and the location parameter.
1. A method of audio rendering three-dimensional (3D) audio signals, the method comprising:
receiving an audio signal of an object and multichannel audio signals including a height channel signal;
receiving location information of the object, wherein the location information comprises height information;
obtaining first gains for the multichannel audio signals based on a first layout which is formed by the multichannel audio signals and a second layout which is formed by a plurality of output channel signals;
obtaining second gains for the audio signal of the object based on the location information of the object and the second layout;
rendering the multichannel audio signals to provide a plurality of audio-channel signals representing 3D sound over the second layout based on the first gains;
rendering the audio signal of the object to provide a plurality of object-channel signals representing 3D sound over the second layout based on the second gains; and
generating the plurality of output channel signals by mixing the plurality of audio-channel signals and the plurality of object-channel signals,
wherein the first layout and the second layout are independent of each other.
2. The method of claim 1 ,
wherein a number of channels included in the first layout and a number of channels included in the second layout are independent of each other.
3. The method of claim 1 ,
wherein the location information further comprises at least one of distance and azimuth information of the audio signal of the object.
4. The method of claim 1 , further comprising:
obtaining a spatial parameter indicating a correlation between the multichannel audio signals and the audio signal of the object.