Audio Processing Method, Audio Processing Apparatus, and Recording Reproduction Apparatus Capable of Outputting Voice Having Regular Pitch Regardless of Reproduction Speed

摘要

This invention relates to an audio processing method, audio processing apparatus, and recording and reproduction apparatus that enables sound of a normal pitch to be output regardless of the reproduction speed from a commercial-use VTR, 6-mm tape recorder, or the like, of which the pitch of output sound would otherwise change in proportion to the reproduction speed. The pitch of reproduced sound that has been recorded in an analog recording medium such as magnetic tape normally changes in proportion to the reproduction speed of the apparatus. Thus, it has been impossible for a VTR to reproduce sound simultaneously with images that are to be reproduced in slow motion without that sound appearing to have a non-realistic pitch.