Method and an apparatus for processing an audio signal

摘要

A method of processing an audio signal, and which includes a receiving object information including object level information indicating a level of objects, object gain information and object correlation information; receiving preset presence information and preset number information; receiving preset information based on the preset presence information and the preset number information by an audio decoding apparatus, the preset information including preset metadata representing an attribute mode of the preset information, preset rendering data and preset type information indicating whether the preset rendering data is in a matrix type or not obtaining a preset matrix from the preset rendering data by the audio decoding apparatus, and generating a processed audio signal by controlling a gain or panning of the at least one object included in the audio signal based on the downmix processing information.

主权项

1. A method of processing an audio signal, the method comprising:
receiving the audio signal, wherein the audio signal includes a plurality of objects; receiving object information including object level information indicating a level of the plurality of objects, object gain information indicating gains of each of the plurality of objects, and object correlation information indicating correlation between objects; receiving preset presence information and preset number information, the preset presence information indicating the preset information is available, and the preset number information indicating a number of the preset information, wherein the preset information exists in a header region or in each frame, wherein when the preset information exists in the header region, the preset information is applied to all frames, and wherein when the preset information exists in the each frame, then the preset information is applied to a corresponding frame; receiving preset information based on the preset presence information and the preset number information by an audio decoding apparatus, wherein the preset information includes preset metadata representing an attribute mode of the preset information, preset rendering data for rendering the plurality of objects and preset type information indicating whether the preset rendering data is in a matrix type or not; obtaining a preset matrix from the preset rendering data by the audio decoding apparatus, wherein the preset matrix indicates a contribution degree of the plurality of objects to an output channel; generating downmix processing information based on the object information, the preset metadata and the obtained preset matrix; and generating a processed audio signal by controlling a gain or panning of the at least one object included in the audio signal based on the downmix processing information.