Audio signal processing device and an audio signal processing method

PROBLEM TO BE SOLVED: To solve a problem in which speaking-speed conversion is performed double when speaking-speed conversion processing is performed even on a transmission side depending upon a broadcast program in addition to a speaking-speed converting function on a reception side. SOLUTION: A transmission device 1 packetizes and multiplexes a voice signal and also multiplexes and transmits speaking-speed conversion completion information indicating whether speaking-speed conversion of each voice signal is already performed on the transmission side or at a sound source before it as information attached to the voice signal. A voice signal processing apparatus 10A detects the speaking-speed conversion completion information in a received multiplexed signal by a speaking-speed conversion information detection part 13. A speaking-speed conversion processing part 14 decides whether speaking-speed conversion of a selected voice signal of a selected program after decoding which is outputted from a voice signal decoder 12 is already performed before the transmission, and turns off speaking-speed conversion processing operation when the speaking-speed conversion is already performed before the transmission to prevent speaking-speed conversion from being performed on both the transmission side and reception side in duplication, and performs speaking-speed conversion processing when the speaking-speed conversion is not performed before the transmission. COPYRIGHT: (C)2005,JPO&NCIPI