Patent ID: 8340325
Filing Date: 2012-12-25
Classification: G10L,H04S

Abstract:
1. A method for processing an audio signal, comprising: receiving a downmix signal comprising at least one object signal, receiving object information determined when the downmix signal is generated; receiving mix information for controlling at least one object signal; generating multi-channel information using the object information and the mix information, wherein the multi-channel information includes at least one gain modification factor and at least one of a channel level difference, an inter channel correlation and a channel prediction coefficient; applying the at least one gain modification factor to the downmix signal to generate a gain-modified downmix signal by modifying gain of the downmix signal; and generating a multi-channel signal using the gain-modified downmix signal and at least one of the channel level difference, the inter channel correlation and the channel prediction coefficient, wherein: the gain modification factor corresponds to a time-subband-variant factor for controlling gain of the downmix signal the object information includes at least one of object level information and object correlation information, the downmix signal corresponds to mono signal or stereo signal, and a number of channels of the multi-channel signal is more than a number of channels of the downmix signal.