ENCODING DEVICE AND ENCODING METHOD

摘要

Provided are an encoding device and encoding method capable of improving the accuracy of determining whether a BGM signal is in a voice signal mode or a music signal mode and minimizing degradation in sound quality. A mode determination unit (201) determines whether an input signal is in a voice signal mode or music signal mode, and an energy calculation unit (202) calculates the average energy of the input signal included in a frame determined to be a music signal. A hangover length determination unit (203) increases the hangover length when the amount of calculated energy information is large, and decreases the hangover length when the amount of calculated energy information is small. A hangover unit (204) uses the mode information of the previous frame, the mode information of the present frame, and the determined hangover length and corrects the mode information for the present frame when a prescribed condition is satisfied.