Color channel signal-to-noise improvement in digital television

Details Color channel signal-to-noise improvement in digital television Color channel signal-to-noise improvement in digital television

1982-09-01

1984-09-18

Martin, John C.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358904, H04N 9535

Patent

active

044727330

ABSTRACT:
Circuitry included in a TV receiver for enhancing the signal-to-noise ratio of the chrominance signal includes an adaptive linear phase, low pass filter which has its bandwidth controlled responsive to the upper frequency components of the current chrominance signal. A frequency analyzer coupled to the chrominance channel counts the number of chrominance signal excursions during predetermined periods to generate a number related to the maximum signal frequency during such periods. The number is applied to a decoder which generates address codes for application to a look up table which provides filter coefficients for altering the filter bandwidth in accordance with the current maximum signal frequency components.

REFERENCES:
patent: 3742395 (1973-06-01), Yoneyama
patent: 4038539 (1977-07-01), Van Cleave
patent: 4064530 (1977-12-01), Kaiser et al.
patent: 4106102 (1978-08-01), Desblache
patent: 4146931 (1979-03-01), Delforge
patent: 4268855 (1981-05-01), Takahashi
patent: 4283693 (1981-08-01), Sanez
patent: 4296436 (1981-10-01), Achiha
patent: 4303943 (1981-12-01), May
patent: 4321686 (1982-03-01), Horna
patent: 4322739 (1982-03-01), Drewery et al.
patent: 4334244 (1982-06-01), Chan et al.
patent: 4395729 (1983-07-01), Lewis
patent: 4402013 (1983-08-01), Wargo

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