Video signal processor

Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium

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Details

386 11, H04N 979

Patent

active

061189197

ABSTRACT:
A luminous signal processing system, adapted for use in a home VTR, controls the frequency characteristic of a color signal trapping circuit in accordance with the level of a color signal component. The system widens the band of a luminous signal component, thereby improving the resolution. The system is provided with a circuit for extracting a luminous signal component from a video signal input to the recording system of the VTR, a frequency characteristic variable type color signal trapping circuit used for extracting a low-frequency carrier wave FM signal component and having a trapping frequency that varies in accordance with a control input, a circuit for extracting a color signal component from the video signal input, converting the extracted color signal component into a down-converted color signal, and extracting a down-converted color signal, a color signal level detecting circuit, adapted for the recording system, for detecting the level of a color signal included in the video signal input and supplying a detection output to the color signal trapping circuit as a control input, and an adder circuit for adding an output signal of the color signal trapping circuit and a down-converted color signal.

REFERENCES:
patent: 4691246 (1987-09-01), Miura et al.
patent: 4922331 (1990-05-01), Ezaki
patent: 4941054 (1990-07-01), Muramoto
patent: 5543926 (1996-08-01), Ezaki
patent: 5761370 (1998-06-01), Kim
patent: 5812348 (1998-09-01), Hwang
patent: 5841934 (1998-11-01), Chielewski et al.

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