| 摘要 |
PURPOSE: An audio/speech signal encoding method is provided to efficiently encode and decode a speech signal, an audio signal, and a mixed signal of the speech signal and the audio signal. CONSTITUTION: A band division unit(700) divides an input signal. A domain converter(710) converts a divided low-frequency band signal from a temporal domain into a frequency domain in first and second conversion methods. By the usage of a signal converted by the second conversion method, a frequency domain encoding unit(720) encodes a signal converted by the first conversion method in the frequency domain. A high-frequency band encoding unit(730) encodes the divided high-frequency band signal by using the low-frequency band signal. [Reference numerals] (700) Band division unit; (710) First domain converter; (720) Frequency domain encoding unit; (730) High-frequency band encoding unit; (740) Multiplexing unit |
