Adaptive type color demodulation apparatus for pal system

An adaptive type color demodulation apparatus for PAL system includes a first color demodulating circuit (PAL-D) for demodulating a PAL system chrominance signal between scanning lines, a second color demodulating circuit (PAL-S) for demodulating the PAL system chrominance signal on a scanning line,...

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Bibliographic Details
Main Author HATANO, TAKAHISA
Format Patent
LanguageEnglish
French
German
Published 04.10.1995
Edition6
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:An adaptive type color demodulation apparatus for PAL system includes a first color demodulating circuit (PAL-D) for demodulating a PAL system chrominance signal between scanning lines, a second color demodulating circuit (PAL-S) for demodulating the PAL system chrominance signal on a scanning line, a vertical correlation detecting circuit for detecting a vertical correlation between chrominance signals which are apart by two horizontal periods, and a selector for selecting either an output of the first color demodulating circuit or an output of the second color demodulating circuit according to the detected result of the correlation detecting circuit. Hue distortion of the chrominance signal which occurs during signal transmission is cancelled even if the phase distortion is large and a precise color signal is demodulated even if there is no correlation between adjacent scanning lines.
Bibliography:Application Number: EP19950302160