Patent ID: 6414721
Filing Date: 2002-07-02
Classification: H04N

Abstract:
A video signal digital processing device for digitally processing an analog color video signal and feeding the digitally processed analog color video signal to display means, comprising:analog-to-digital conversion means for converting said analog color video signal into a digital video signal; first temporary storage means for storing digital values of a luminance signal corresponding to a plurality of pixels composing one screen; second temporary storage means for storing digital values of color data representing three primary colors corresponding to the plurality of pixels composing one screen; luminance data extraction means for extracting the digital values of the luminance signal from said digital video signal while said analog color video signal is a signal for a moving picture which is changed for each frame; read timing designation means for designating timing at which the color data should be read from said digital video signal; color data extraction means for extracting for each color the digital values of the color data representing the three primary colors from said digital video signal at the timing designated by said read timing designation means; write control means for writing in a sequential order of frame scanning the digital values of the luminance signal for each frame which have been extracted by said luminance data extraction means into said first temporary storage means until the read timing is designated by said read timing designation means, and writing the digital values of the color data which have been extracted for each color by said color data extraction means into said second temporary storage means when the read timing is designated by the read timing designation means; and read control means for sequentially reading out the digital values of the luminance signal for each frame which are stored in said first temporary storage means and feeding the digital values to said display means, to display the moving picture corresponding to said analog color video signal in black and white, and sequentially reading out the digital values of the color data for each color in a frame which are stored in said second temporary storage means and feeding the digital values to the display means, to display a still picture corresponding to the frame of said analog color video signal in colors.