Voice encoding method, voice decoding method, voice encoding device, voice decoding device, telephone device, pitch conversion method and medium

摘要

In the case where an audio signal is encoded or decoded, pitch control can be performed by simple processing and structure. When the speech signal performs sinusoidal encoding on each encoder obtained by dividing the speech signal on the time axis by a predetermined encoder, a linear predictive residual of the speech signal is obtained, and the resulting speech coded data is processed and the sinusoidal wave is processed. The pitch component of speech encoded data encoded by the analysis encoding is changed by a predetermined calculation process in the pitch conversion unit.