H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 5/208 (2006.01) H04N 9/64 (2006.01) H04N 5/14 (2006.01)
Patent
CA 2284935
Since A/D conversion circuits 30r, 30g and 30b to convert for output analog R, G and B signals to digital signals, a phase adjustment circuit 31 to output by delaying in the portion of 1 linc output signals of these A/D conversion circuits 30r, 30g and 30b, a first signal generation circuit 35 to generate Y signals from output signals of A/D conversion circuits 30r, 30g and 30b, a second Y signal generation circuit 37 to generate a Y signal from an output signal of the phase adjustment circuit 31, a contour extracting circuit 39 to extract a vertical contour component and a horizontal contour component from Y signals generated by first and second Y signal generation circuits, and contour adders 34r, 34g and 34b to output signals contour-emphasized adding a vertical contour component and a horizontal contour component extracted by this contour extracting circuit 39 to output signals of the phase adjustment circuit are provided, and since it has been designed that the contour extracting 39 extracts a vertical contour component and a horizontal contour component from Y signals generated by first and second Y signal generation circuits 35 and 37 , provided the line memory necessary for the contour extracting circuit 39 is made as 1 piece, the power consumption can be made smaller, as well the cost can be loared.
L'invention concerne un circuit d'accentuation de contours comprenant, d'une part un premier générateur (35) de signaux Y, qui génère un signal de luminance à partir des signaux numériques R, V et B, et des mémoires de ligne (31r, 31g, 31b) qui retardent les signaux R, V et B d'une ligne, et d'autre part un second générateur (37) de signaux Y, qui génère un signal de luminance à partir des sorties des mémoires de lignes, un circuit (39) d'extraction de contours, qui extrait les composantes de contours verticales et horizontales, un multiplicateur (42) de facteur, qui multiplie ces composantes de contours par des facteurs Kr, Kv et Kb et qui fournit des composantes de contours pour les signaux R, V et B, et des circuits (34r, 34g et 34b) d'addition de contours, qui ajoutent les composantes de contours R, V et B aux signaux R, V et B.
Kurita Masanori
Suzuki Susumu
Fujitsu General Limited
Gowling Lafleur Henderson Llp
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