Patent ID: 9536529
Date: 2017-01-03
CPC Classifications: G10L,G11B,H04S

Claim:
1. A method for processing an audio signal, comprising: receiving a downmix signal and side information including object information, wherein the object information includes downmix gain information; extracting, from the side information, an extension type identifier indicating whether an extension area includes a residual signal; when the extension type identifier indicates that the extension area includes the residual signal, extracting, from the extension area of the side information including the residual signal, control restriction information for use in a residual using mode; receiving control information for controlling gain or panning of at least one object signal; estimating modified control information using the received control information, the extracted control restriction information, and a downmix matrix, based on a condition in the residual mode, wherein the downmix matrix is generated using the downmix gain information, the downmix gain information indicating a gain that represents an extent to which each object is included in the downmix signal; obtaining at least one of an enhanced object signal and a plurality of regular object signals from the downmix signal using the residual signal; and generating an output signal using the modified control information and at least one of the enhanced object signal or the plurality of regular object signals, wherein the control restriction information for the residual using mode relates to a parameter indicating limiting degree of the control information in case of the residual using mode, and wherein the condition in the residual using mode is that all of the plurality of regular object signals are controllable as one instead of being controlled individually and the number of channels of the downmix signal is the same as the number of channels of the output signal.