| 摘要 |
PROBLEM TO BE SOLVED: To prevent unnatural tone quality, when double speed reproduction is carried out. SOLUTION: When double speed reproduction is carried out, an MPEG audio decoder 22 intermittently decodes a plurality of audio frames constituting an audio PES at the rate of one frame in two frames. The level change of decoded audio data discontinues at a switching part of the frame. In the arithmetic circuit 24, level correction by the method of least squares is provided to the switching part of the frame, to eliminate the discontinuity of the level change. |
