Abstract: A voice recording/reproducing device implemented by using an ADPCM (Adaptive Differential Pulse Code Modulation) method is provided which is capable of reproducing faithfully an original voice even -at a time of performing a fast-forward reproduction by removing or culling a specified voice block from a continued series of voice blocks. The voice recording/reproducing device is so configured that an ADPCM analyzer is operated to quantize digital voice data converted by an ADC (Analog-Digital Converter), to encode it and to split to voice blocks and then to add a parameter used to decide a width for quantizing and previously reproduced value to each voice block as an intermediate data, and that an ADPCM synthesizer is operated to decode, at the time of the fast-forward reproduction, a head value of encoded data contained in the voice block to be reproduced by using the additional data. The digital voice data is then converted by the DAC to analog voice signals and original voices are faithfully reproduced.

Abstract: A voice recording/reproducing device implemented by using an ADPCM (Adaptive Differential Pulse Code Modulation) method is provided which is capable of reproducing faithfully an original voice even at a time of performing a fast-forward reproduction by removing or culling a specified voice block from a continued series of voice blocks.