Patent ID: 8781843

Claim:
A method of processing a signal, comprising: receiving, by a decoding apparatus, at least one of a first signal and a second signal; receiving, by the decoding apparatus, mode information including a first frame mode and a second frame mode, the first frame mode corresponding to mode information for a first frame, the second frame mode corresponding to mode information for a second frame, the first frame and the second frame being consecutive frames, the first frame mode and the second frame mode being represented by a prescribed mode corresponding to one of an audio scheme mode, a mixed scheme mode and a speech scheme mode, the audio scheme mode using an audio coding scheme, the speech scheme mode using a speech coding scheme, the mixed scheme mode using the speech coding scheme and the audio coding scheme; and decoding, by the decoding apparatus, the at least one of the first signal and the second signal using at least one of the speech coding scheme and the audio coding scheme according to the mode information, wherein the decoding step comprises determining the first frame mode for the first frame and the second frame mode for the second frame, and changing the second frame mode into the mixed scheme mode when the first frame mode is the audio scheme mode and the second frame mode is the speech scheme mode or when the first frame mode is the speech scheme mode and the second frame mode is the audio scheme mode.