| 摘要 |
PROBLEM TO BE SOLVED: To provide an automatic volume control effect better than before by acquiring agreement in reproduction time of an audio signal between the timing of acquisition of detected output for volume adjustment and the timing of volume adjustment according to the detected output. SOLUTION: The audio signal to be reproduced with synchronization of an image and reproduction time is detected for volume adjustment at a stage before signal delay process for synchronization. The volume adjustment according to the detected output for the audio signal after the signal delay process is performed at the timing of prescribed time delay from the detection point. In this way, the timing of acquiring the detected output for volume adjustment and the timing of volume adjustment according to the detected output agree with each other in reproduction time of the audio signal. COPYRIGHT: (C)2007,JPO&INPIT
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