| 摘要 |
The present invention relates to a method and device for processing an audio signal and, more particularly, to a method and device for decoding an audio signal by using addition and subtraction signals in an extended form with respect to audio signals of two or more channels received through a communication signal. A method for encoding audio signals of at least two channels, according to the present invention, comprises the steps of: receiving a first audio signal and a second audio signal; obtaining a correlation between the first audio signal and the second audio signal; determining whether the correlation is equal to or greater than a reference value; calculating a first gain value and a second gain value by using the first audio signal and the second audio signal if the determination result is true; and generating a first transmission audio signal and a second transmission audio signal by using the first audio signal, the second audio signal, the first gain value and the second gain value, wherein the first transmission audio signal and the second transmission audio signal are encoded by using a perceptual coding technique. |
