Improvements in sterophonic motion picture sound-tracks...

Details Improvements in sterophonic motion picture sound-tracks... Improvements in sterophonic motion picture sound-tracks...

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G11B 7/007 (2006.01) G03B 31/02 (2006.01) G11B 7/003 (2006.01) G11B 7/08 (2006.01) G11B 7/20 (2006.01) G11B 20/00 (2006.01) G11B 23/18 (2006.01) G11B 27/34 (2006.01) H04S 3/02 (2006.01)

Patent

CA 1221168

IMPROVEMENTS IN STEREOPHONIC MOTION PICTURE SOUND-TRACKS COMPATIBLE WITH DIFFERENT SOUND PROJECTION FORMATS AND RECORD AND PLAYBACK APPARATUS THEREFOR Abstract of the Disclosure Discrete four-channel photographic (optical motion picture sound-tracks are disclosed that are compatible with existing monophonic and stereo variable area (SVA) theatre projection equipment. Six track and four track embodiments are disclosed. In the four track embodi- ments 4-4-4 matrix encoding is employed in producing the sound-track. Apparatus for recording and reproducing the compatible four-channel sound-tracks are also dis- closed.

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