VIDEO PRESENTER

摘要

PURPOSE: A video presenter is provided to turn off a lighting ramp on the basis of illumination around an object automatically thereby removing need for operation of the lighting ramp. CONSTITUTION: A photoelectric convertor(208) converts an incident light from an object to an electrical signal. An analog signal processor(210) processes the electrical signal to output the first and second signals. An analog/digital converter(211) converts the second signal to digital signal. A digital signal processor(212) processes the digital signal to output video signal. An illumination determining part(22) compares the level of the first signal to predefined reference value and generates state signals. A main controller(203) controls the analog signal processor and digital signal processor and turns off a lighting ramp on the basis of the state signals. A mixing circuit(213) outputs composite video signal by mixing the video signals.