Audio-visual systems and methods

Details Audio-visual systems and methods Audio-visual systems and methods

1976-03-08

1982-03-16

Hayes, Monroe H.

Optics: motion pictures

With sound accompaniment

Separate picture and sound carrier systems

352 17, 352 20, 352 92, 352 69, G03B 3104

Patent

active

043198120

ABSTRACT:
Audio-visual systems including a motion picture film projector and a tape player, the film having optical cues and program reference notches for stopping film advancement, and the tape having start cues for starting film advancement. The optical stop cues are detected dynamically and with cue length discrimination. A program select control causes the system to search for a program reference notch and to ignore optical stop cue until the notch is detected. Other features include a pause-run control, a variable frame rate control with a single-frame advance option, and remote controls. Optical stop cue detection systems include a light transmissive system, a light reflective system, a polarized light system, and a colored light system.

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IBM Technical Disclosure Bulletin, vol. II, No. 10, 3-69.

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