Stereophonic motion picture photographic sound-tracks compatible

Details Stereophonic motion picture photographic sound-tracks compatible Stereophonic motion picture photographic sound-tracks compatible

1983-03-14

1986-03-18

Richardson, Robert L.

Dynamic information storage or retrieval

Storage or retrieval of spatially related acoustic signals

369 89, G11B 720, H04R 500

Patent

active

045773050

ABSTRACT:
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 embodiments 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 disclosed.

REFERENCES:
patent: 3845245 (1974-10-01), Takahashi
patent: 3982069 (1976-09-01), Takahashi
patent: 4044207 (1977-08-01), Vlahos
Bauer et al.; A Compatible Stereo-Quadraphonic (SQ) Record System; Journal of the Audio Eng. Soc.; Sep. 71; vol. 19, No. 8; pp. 638-646.
Durbin; Playback Effects from Matrix Recordings; Journal of the Audio Eng. Soc.; Nov. 72; vol. 20, No. 9; pp. 729-733.

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