Television – Image signal processing circuitry specific to television – Noise or undesired signal reduction
Patent
1993-11-01
1995-09-05
Kostak, Victor R.
Television
Image signal processing circuitry specific to television
Noise or undesired signal reduction
348618, H04N 5213
Patent
active
054483093
ABSTRACT:
A noise canceler for a video signal includes: a delay circuit for outputting a succeeding line video signal, a present line video signal and a preceding line video signal: a minimum value detector which compares the succeeding line video signal with the present line video signal, and the present line video signal with the preceding line video signal, so as to output the lower-level minimum value; a maximum value selector for comparing the minimum values so as to select the higher-level maximum value; a maximum value detector which compares the succeeding line video signal with the present line video signal, and the present line video signal with the preceding line video signal, so as to output the higher-level maximum value; a minimum value selector for comparing the maximum values so as to select the lower-level minimum value; an adder for summing the maximum value output from the maximum value selector and the minimum value output from the minimum value selector so as to output a signal containing correlation noise; and a subtracter for subtracting the present line video signal from the summed signal from the adder so as to output a video signal without noise.
REFERENCES:
patent: 4839727 (1989-06-01), Tanaka et al.
patent: 4969033 (1990-11-01), Yamada et al.
patent: 5047840 (1991-09-01), Miki
patent: 5166794 (1992-11-01), Tanaka
Kostak Victor R.
Samsung Electronics Co,. Ltd.
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