CONVERSION DEVICE FOR VOICE TIME BASE

摘要

PURPOSE: To provide a conversion device for voice time base which can suppress abolition of data as much as possible while holding a step at the time of recording and automatically convert to a speed being easy to listen. CONSTITUTION: A voice reproduced with a speed of M times from a recording and reproducing section 101 is converted to a digital signal by an A/D converter 102 with a period T/M. It is decided by a sound and silence deciding section 103 whether this signal has sound or not, and only a sound part is stored in a buffer memory 105 by a writing control section 104. A reading control section 106 reads out data from a buffer memory 105 with a period T, and a time base change processing of the data is performed in a time base control section 109. Residual quantity of data is successively measured from the present writing and reading position in the buffer memory in a data residual quantity monitoring section 107, and a time base conversion ratio is decided in accordance with data residual quantity based on this result and a previously decided regulation in an adaptable speed control section 108.