Patent ID: 7979282
Filing Date: 2011-07-12
Classification: G10L,H04S

Abstract:
1. An audio decoding method comprising: extracting, by an audio decoding apparatus, a downmix signal comprising at least one object signal, and side information generated when the at least one object signal is downmixed into the downmix signal, from an input audio signal; receiving, by an audio decoding apparatus, control information for controlling position or level of the at least one object signal; generating, by an audio decoding apparatus, parameter information in order to modify the downmix signal, based on the control information and the side information; generating, by an audio decoding apparatus, a spatial parameter based on the control information and the side information; generating, by an audio decoding apparatus, a processed downmix signal by applying the parameter information to the downmix signal; and, generating, by an audio decoding apparatus, a multi-channel signal by applying the spatial parameter to the processed downmix signal, wherein the spatial parameter comprises at least one of channel level difference information, inter-channel correlation information, and channel prediction coefficient information.