Patent ID: 8660851
Filing Date: 2014-02-25
Classification: G10L

Abstract:
1. A decoding apparatus, comprising: a receiver that receives an encoded monaural signal obtained by encoding a monaural signal computed from first and second channel signals of a stereo signal and an encoded difference signal obtained by encoding a difference signal between the first and second channel signals; a detector that detects a variation over time of the received encoded difference signal; a decoder that decodes the received encoded monaural signal to obtain the decoded monaural signal and decodes the received encoded difference signal to obtain the decoded difference signal; a smoothing section, including a processor, that smoothes the decoded difference signal by an operation of the decoded difference signal and a coefficient corresponding to the detected variation over time; and a computation section, including a processor, that computes the decoded stereo signal from the decoded monaural signal and the decoded difference signal obtained by smoothing, wherein the detector detects, as the variation over time, that a frame including the encoded difference signal is changed to a frame not including the encoded difference signal or that a frame not including the encoded different signal is changed to a frame including the encoded difference signal.