Prompting guide for chroma keying

Details Prompting guide for chroma keying Prompting guide for chroma keying

1996-02-01

1999-03-23

Hsia, Sherrie

Television

Image signal processing circuitry specific to television

Special effects

348592, 348722, 348552, H04N 975

Patent

active

058867473

ABSTRACT:
A method and apparatus is described where the coordinates of the main objects of a video studio set are placed in a computer and special markings are projected or screened on the floor or on the studio walls in real time. This enables an actor to easily find his way around the set, and to focus his gaze on the virtual objects appearing in or disappearing from the studio. The present invention gives the actor the timings for various events taking place in the studio. The special markings are completely invisible to the camera and to the home viewers because they are only active during virtual blanks of the camera such as the vertical blanking interval or the horizontal blanking interval in an NTSC, PAL, SECAM or other video signal format.

REFERENCES:
patent: 3898377 (1975-08-01), Fairbairn et al.
patent: 3986204 (1976-10-01), Smith
patent: 4811084 (1989-03-01), Belmares-Sarabia et al.
patent: 5313275 (1994-05-01), Daly et al.
patent: 5477282 (1995-12-01), Moore
patent: 5500684 (1996-03-01), Uya

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