Clock signal generating apparatus and clock signal...

Details Clock signal generating apparatus and clock signal... Clock signal generating apparatus and clock signal...

H - Electricity

04

N

H04N 5/06 (2006.01) H04N 5/12 (2006.01) H04N 5/21 (2006.01)

Patent

CA 2198338

In an apparatus for generating a clock signal with the phase thereof locked to the phase of a horizontal synchronization signal, noise superposed on the horizontal synchronization signal of a digital video signal is eliminated. A noise suppressing block is provided in front of a phase comparator. Typically, the noise suppressing block comprises a slice block and a spike removing block. The noise suppressing block is used for eliminating noise superposed on the horizontal synchronization signal of a digital video signal which is output by an A/D converter.

ans un appareil servant à générer un signal d'horloge dont la phase est verrouillée avec la phase d'un signal de synchronisation horizontale, le bruit superposé au signal de synchronisation horizontale d'un signal vidéo numérique est éliminé. Un bloc de suppression de bruit est placé devant un comparateur de phase. En règle générale, il comprend un bloc de découpage et un bloc de suppression de pointes. Il sert à supprimer le bruit superposé au signal de synchronisation horizontale d'un signal vidéo numérique de sortie provenant d'un convertisseur analogique numérique.

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