Patent ID: 8615088

Claim:
An apparatus for processing an audio signal, comprising: an audio signal receiving unit receiving a downmix audio signal generated by downmixing at least one object; an object information receiving unit receiving object information including object level information indicating a level of the at least one object, object gain information indicating a gain value of the at least one object and object correlation information indicating a correlation between objects; a preset metadata receiving unit receiving preset metadata from preset information; a preset rendering data receiving unit obtaining a preset matrix from the preset information, wherein the preset matrix is usable to control a gain or panning of the at least one object; a display unit displaying the preset metadata; an input unit receiving a command for selecting one of the preset metadata, wherein the preset rendering data receiving unit obtains the preset matrix corresponding to a selected preset metadata; an object information processing unit generating downmix processing information and multi-channel information based on the object information and the obtained preset information; a downmix audio signal processing unit processing the downmix audio signal based on the downmix processing information and the preset matrix corresponding to the selected preset metadata; and a decoder decoding the processed downmix audio signal based on the multi-channel information and outputting an output channel.