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    • 27. 发明专利
    • PICTURE SIGNAL RECEIVER
    • JPH02243076A
    • 1990-09-27
    • JP4429890
    • 1990-02-23
    • RCA CORP
    • ROBAATO NOOMAN HAASUTOKAANZU HARINTON PAWAAZU
    • H04N7/015H04N7/00H04N7/08H04N7/12H04N11/24
    • PURPOSE: To improve the vertical and horizontal resolution of a picture signal receiver by reproducing pictures having second visibility by accepting the difference signals of first signals indicating pictures having first visibility and the pictures having second visibility and adding the difference signals to each other. CONSTITUTION: A high-visibility camera 400 generates base-band signals having an effective frequency band width expanded to 8.4MHz and the signals are impressed upon a standard-visibility monitor 710 through a 4.2-MHz low-pass filter 1010. The band width-limited signals are also impressed upon a high- visibility monitor 1012. A subtracting circuit 1014 generates difference signals having a band width from 4.2MHz to 8.4MHz by subtracting the band width- limited signals outputted from the filter 1010 from the full-band width signals inputted to the filter 1010. The difference signals indicate the high-visibility part of the signals and the combination of the filter 1010 and circuit 1014 works as a high-pass filter. The difference signals are impressed upon the second input of the monitor 1012. In the monitor 1012, an adding circuit 1018 receives the difference signals delta from the band width-limited signals, adds both difference signals to each other, reproduces high-visibility signals, and supplies the high-visibility signals to a monitor 714.