Patent ID: 6678650
Filing Date: 2004-01-13
Classification: G10L

Abstract:
An apparatus for processing a reproducing speed of an input acoustic signal in real time to convert the reproducing speed to a speed lower than a reproducing speed of an original sound, the apparatus comprising:characteristic detecting means for detecting a characteristic of an acoustic frame signal having a predetermined length contained in the input acoustic signal; calculation means for calculating a speech-speed converting rate from the characteristic of the input acoustic signal detected by the characteristic detecting means; speech-speed converting means for performing speech-speed conversion on the input acoustic frame signal in accordance with the speech-speed converting rate calculated by the calculation means to generate a speech-speed converted acoustic frame signal; signal encoding means for encoding the speech-speed converted acoustic frame signal to reduce an amount of data; coded data storage means for storing the coded data generated by the signal encoding means; and signal decoding means for decoding the coded data read from the coded data storage means to generate an output acoustic frame signal having a predetermined length.