| 摘要 |
<p>PURPOSE:To make no sense of incompatibility occur and to hear in natural feeling by gaining the time shortened in the high speed reproduction of an audio signal with backward high speed opposite phase reproduction and the forward high speed reproduction of the same audio part and performing the connection to next data at a zero-cross point. CONSTITUTION:An original audio signal is A/D converted to record on a recording medium, and is read out at a high speed according to the interval to be raised. When first zero-cross point A after a fixed time TC lapses is detected at the time of the high speed read, the recording data in a reverse direction on time scale are read out with the opposite phase of positive/negative at the same high speed as the read speed from the point of time. When the first zero- cross point B is detected by the opposite phase high speed read, the recording data are read out toward the zero-cross point A' of the original signal in the positive direction of time scale at the same speed as the read speed from the point of time. Then, when another zero-cross point is detected after a fixed time TC elapses from the zero-cross point B, the operation is repeated. Thus, the data by time compression when the interval is raised is compensated, and the tempo is maintained at a fixed level.</p> |
