PURPOSE: To make it possible for an announcer to advance programs while observing a chromakey window, by displaying the second picture within the chromakey window in chromakey tracking.
CONSTITUTION: Monitor television 6 for the second picture is provided at the center of chromakey window 5, and window inside 5a around television 6 is blue. This unit is provided in a studio and is image-picked up by television camera 1. This picture is supplied to chromakey signal generator 7 and mixing key amplifier 9. Chromakey signal generator 7 generates chromakey signals in respect to parts corresponding to blue part 5a of chromakey window 5. Next, chromakey processing circuit 8 generates chromakey signals in parts corresponding to monitor television 6 and part 5b, thus obtaining chromakey signals throughout chromakey window as conventional signals.
INABA MASAO
KANGI KAZUO
ZENKOKU ASAHI HOUSOU KK