Patent ID: 8566107
Filing Date: 2013-10-22
Classification: G10L

Abstract:
1. 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, the mode information for indicating that a prescribed mode corresponds to which one of at least three modes including a first mode, a second mode and a third mode; when the mode information indicates that the prescribed mode is the first mode, decoding, by the decoding apparatus, the first signal using a first coding scheme; when the mode information indicates that the prescribed mode is the second mode, decoding, by the decoding apparatus, the first signal and the second signal, comprising: decoding the first signal using the first coding scheme; decoding the second signal using a second coding scheme; and, generating an output signal using the decoded first signal and the decoded second signal; when the mode information indicates that the prescribed mode is the third mode, decoding, by the decoding apparatus, the second signal using the second coding scheme, wherein the mode information includes a first frame mode as the mode information on a first frame and a second frame mode as the mode information on a second frame; and detecting if a restricted mode change occurs, which includes when the first frame mode is the first mode and the second frame mode is the third mode or when the first frame mode is the third mode and the second frame mode is the first mode, and changing at least one of the first frame mode and the second frame mode into the second mode when detecting a restricted mode change, wherein the first coding scheme corresponds to a speech coding scheme, and wherein the second coding scheme corresponds to an audio coding scheme, and wherein the mode information is represented by using at least two pieces of flag information.