DOLBY

Abstract

ELECTRONIC RECORDING/REPRODUCING APPARATUS EMBODYING NOISE REDUCTION CIRCUITS FOR USE IN CONNECTION WITH AUDIO [AND VIDEO] SIGNALS-NAMELY, MAGNETIC TAPE RECORDERS, CASSETTE RECORDERS, [RECORD PLAYERS,] RADIO [TRANSMITTERS AND] RECEIVERS, AND MOTION PICTURE SOUND TRACK RECORDING AND REPRODUCING APPARATUS; MAGNETIC TAPES, [DISCS,] * AND * MOTION PICTURE SOUND TRACKS [, AND VIDEO RECORDINGS] OF ELECTRICAL SIGNALS WHICH HAVE BEEN SUBJECTED TO DYNAMIC RANGE COMPRESSION PRIOR TO RECORDING