| 摘要 |
A multi-channel stereo reproducing apparatus which is capable of favorably reproducing sounds from both a recording medium in which are recorded multi-channel stereo signals of which high-frequency components of rear signals are pre-emphasized and a recording medium in which are recorded ordinary two-channel stereo signals based upon a socalled Dolby TM system, such as an audio disk or the like, so that pictures and sounds reproduced, for example, in a theatre or a cinema house can be enjoyed at home. If a left front signal is denoted by LF, a right front signal by RF, a central front signal by F, and a rear signal by B, these signals are encoded into a left composite signal LT = LF+F/2+B/2 and a right composite signal RT = RF + F/2-B/2, and high-frequency components of the rear signal B are pre-emphasized and are recorded onto a recording medium that is to be reproduced by the multi-channel stereo reproducing apparatus. During the reproduction of sounds from the recording medium in which are recorded two-channel stereo signals consisting of ritht and left front signals RF and LF only in which neither central front signal F nor rear signal B have been encoded, a de-emphasis circuit is by-passed. |
