Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Patent
1997-10-30
2000-04-04
Tran, Thai
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
386120, 348220, H04N 576, H04N 5225
Patent
active
060471026
ABSTRACT:
A magnetic recording type of photographic apparatus comprises an iris for controlling the amount of light incident from a subject, an image sensor for converting a light signal obtained through the iris into an electrical signal, a converting circuit for converting a video signal supplied from the image sensor into a standard television signal, a motion-image signal processing circuit for applying signal processing to the standard television signal and forming a motion-image signal, a still-image signal processing circuit for applying signal processing to the standard television signal and forming a still-image signal, a recording circuit for recording the still-image signal in a still-image recording area of a video track formed obliquely with respect to a longitudinal axis of a magnetic tape, and for recording the motion-image signal in a motion-image recording area of the video track, an integrating circuit for integrating a video luminance signal supplied from the converting circuit, an arithmetic circuit for calculating a difference between the video luminance signal from the integrating circuit and a reference value, an iris controlling circuit for controlling the iris in accordance with the difference calculated by the arithmetic circuit, and a gain setting circuit for setting a gain of the arithmetic circuit to a higher gain when a still image is to be photographed than when a motion image is to be photographed.
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H. Komuro, et al., "New Autofocus Function Improves Picture Quality and Operability of Camcorder", JEE Journal Of Electronic Engineering, vol. 23, No. 231, Mar. 1986, pp. 50-53.
Canon Kabushiki Kaisha
Tran Thai
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