ENCODING DEVICE AND METHOD, DECODING DEVICE AND METHOD, AND PROGRAM

摘要

This technology pertains to an encoding device and method, a decoding device and method, and a program that make it possible to obtain high-quality audio with smaller encoded sizes. A signal encoding unit encodes an audio signal and outputs the obtained signal code string. A coefficient encoding unit encodes mixing coefficients that are used in a mixing process performed on the audio signal and outputs the obtained coefficient code string. A multiplexing unit multiplexes the signal code string and the coefficient code string together and outputs the obtained output code string. The coefficient encoding unit encodes the mixing coefficients by sorting said mixing coefficients on the basis of distances from input acoustic-source positions to playback-side speaker positions and obtaining differences between the mixing coefficients on the basis of the resulting order thereof. This technology can be applied to an encoding device and a decoding device.