KR920020973A - Luminance / Color Signal Separation and Pre-Filtering Circuit of Video Equipment - Google Patents

Abstract

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Description

Luminance / Color Signal Separation and Pre-Filtering Circuit of Video Equipment

Since this is an open matter, no full text was included.

3 is a flow chart of the present invention.

4 is a block diagram of a line comb filter and a line correlation detector of the present invention.

5 is a block diagram of a frame comb filter and a bus detector of the present invention.

6 is a graph showing the input and output relationship of the motion detector of the present invention.

9 is a general configuration of the present invention.

Claims (5)

After determining the line correlation by comparing the frame comb filter (1) and the line comb filter (2) for filtering the color signal in the composite video signal with the current line and the before and after lines from the line comb filter (2) A line correlation detector (3) for outputting the signal to the line comb filter (2), a motion detector (4) for determining and outputting a motion amount from data output from the frame comb filter (1), and the frame A signal processor 5 for receiving signals from the comb filter 1 and the line comb filter 2 and receiving control signals from the line correlation detector 3 and the motion detector 4 and processing these signals; A filter 6 for filtering a color signal output from the signal processor 5 to output a complete color signal, a filter 7 for passing only a desired frequency band among the color signals output from the signal processor 5, and complex A time delay unit 8 for delaying the luminance signal among the video signals, and a subtractor 9 for subtracting the output through the filter 7 from the luminance signal delayed through the time delay unit 8 to output only a complete luminance signal. Luminance / color signal separation and profiling circuit of the video device, characterized in that consisting of. The 1H delay unit according to claim 1, wherein the line comb filter (2) and the line correlation detector (3) delay the color signal of the composite video signal by a unit horizontal section (1H) and delay the delayed signal by a unit horizontal section (1H). (10) (11), subtractors 12 and 13 for subtracting the color signal in the composite zero signal and the outputs of the 1H delay unit 10 and 11, respectively, and the outputs of the subtractor 12 and 13; A low pass filter (14, 15) and an absolute part (16) (17) for filtering and absoluteizing the summation unit, an adder (18) for adding the outputs of the subtractors (12) and (13), and the subtractor (12) ( 13) and the multiplexer 19 which multiplexes the independent information signals of the adder 18 into one information signal, the adder 20 which adds the outputs of the absolute parts 16 and 17, and the trailing device ( When the output of the first comparator 21 comparing the output of 20 and the first threshold value Th ₁ and the outputs of the absolute units 16 and 17 are compared and the output thereof is output to the signal processing unit 5. The key comprises a second comparator (22), wherein the brightness / color signal separation and profiling signal of the imager. The frame comb filter (1) and the motion detector (4) according to claim 1, wherein the frame comb filter (1) and the motion detector (4) comprise one frame delay unit (23) for delaying a color signal of the composite video signal by one frame, and an output of the first frame delay unit (23). A subtractor 24 for subtracting the color signal, a low pass filter 25 and an absolute part 26 for filtering and absoluteizing the output of the subtractor 24, and an output of the absolute part 26, A matrix 27 for preventing an error and averaging the samples around it based on the current sample, and comparing the output of the matrix 27 with a second threshold Th ₂ and a third threshold Th ₃ , respectively And comparator (28) (29) for sending their output to the signal processing section (5). The signal processing unit (5) according to claim 1, wherein the signal processing unit (5) includes an adder (30) and a multiplier (31) and a matrix (32) for adding and raising the signals from the frame comb filter (1) and the line comb filter (2). A ROM 33 for receiving only the selected data from the data stored therein and outputting the selected memory; and an operator 34 connected between the ROM 33 and the multiplier 31 to calculate the output of the ROM 33. And luminance / color signal separation and prefiltering circuits. 4. The motion detector 4 according to claim 1 or 3, wherein the motion detector 4 outputs one frame delay unit 35 for delaying one color signal of the composite video signal by one frame, and output signals and color signals of the one frame delay unit 35. A subtractor 36 and an adder 37 for subtracting and adding, low pass filters 38 and 39 and an absolute part 40 for filtering and absoluteizing the outputs of the subtractor 36 and the adder 37, respectively; The signal processor 41 processes the output signals of the absolute unit 40 and the low pass filter 39, and receives the output of the signal processor 41 and averages the samples around the current sample based on the current sample. A luminance / color signal separation and pre-filtering circuit of a video device, characterized by comprising a matrix (42). ※ Note: The disclosure is based on the initial application.