Method and apparatus for down-mixing multi-channel audio

摘要

Provided are a multi-channel audio down-mixing method and apparatus for selecting down-mix target channels based on a calculation of correlations between channels and then down-mixing the down-mix target channels. The method includes: calculating correlations between channels of multi-channel audio; selecting a first channel and a second channel, among the channels of the multi-channel audio, that are to be down-mixed, based on the calculated correlations; and down-mixing the selected first channel and the selected second channel.

主权项

1. A method of down-mixing multi-channel audio, the method comprising:
calculating first correlations between channels of the multi-channel audio; selecting a first channel and a second channel, among the channels of the multi-channel audio, that are to be down-mixed, based on the calculated first correlations; down-mixing the selected first channel and the selected second channel, wherein two channels, included in a channel pair having a highest correlation, are selected as the first channel and the second channel, and wherein, if two or more channel pairs have a same value of the highest correlation, two channels in which at least one piece of additional information for restoring the channels to a state before the down-mixing, to be coded at a highest compression rate, are selected as the first channel and the second channel.