Patent ID: 7991495
Filing Date: 2011-08-02
Classification: G10L

Abstract:
1. A method for processing an audio signal, comprising: extracting a downmix signal, an ancillary signal, and an extension signal being included in an extension area within the ancillary signal from a received bitstream for generating a multi-channel audio signal, wherein the extension area within the ancillary signal includes a header extension area and a frame extension area, and the extension signal is at least one of a residual signal, an artistic downmix signal or an artistic tree extension signal; acquiring extension signal type information indicating a type of the extension signal; acquiring length information of the extension signal from the header extension area and the frame extension area; skipping decoding of the extension signal being included in the header extension area and the frame extension area, based on the length information and the extension signal type information; and generating the multi-channel audio signal by applying the ancillary signal to the downmix signal.