Motion-adaptive luminance/chrominance separator

Details Motion-adaptive luminance/chrominance separator Motion-adaptive luminance/chrominance separator

1992-07-20

1994-02-08

Groody, James J.

Television

Image signal processing circuitry specific to television

Chrominance-luminance signal separation

348700, H04N 978

Patent

active

052852660

ABSTRACT:
An image signal treatment apparatus prevents degradation of picture quality which can occur because of various interferences phenomena arising from causes such as a hanging dot and its motion. The inventive apparatus performs proper correlation by taking into account the motion components of a composite image signal during Y/C signal separation. The inventive apparatus separates the luminance and chrominance signals of the composite image signal according to the motion components with respect to the composite image signal during separation. The apparatus is provided with filters which output luminance and chrominance signals by filtering the composite image signal horizontally, vertically and temporally. Motion detection circuitry outputs detection coefficients by detecting vertical and horizontal motion of the composite image signal. Mixers are provided to mix the luminance and chrominance signals outputted from the filters according to the detection coefficients of the respective motion detection circuitry. Adders add respectively the luminance and chrominance signals from the mixers, and amplifiers amplify and output respectively the luminance and chrominance signals outputted from the adders.

REFERENCES:
patent: 4754322 (1988-06-01), Okuda
patent: 4764964 (1988-08-01), Tanaka
patent: 4868650 (1989-09-01), Weckenbrock
patent: 4979036 (1990-12-01), Carey Smith
patent: 5028996 (1991-07-01), Takahashi
patent: 5144427 (1992-09-01), Kitaura
patent: 5177610 (1993-01-01), Wilkinson

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