Digital video recorder having odd and even fields

Details Digital video recorder having odd and even fields Digital video recorder having odd and even fields

G - Physics

06

F

G06F 13/00 (2006.01) H04N 5/92 (2006.01) H04N 7/18 (2006.01)

Patent

CA 2326680

A video data recording unit receives input video signal streams from up to 16 cameras (42). The signal streams are selectively converted into digital video signals (56-1, 56-2) and are stoned on a data storage device such as a hard disk (62). The apparatus is controlled so that both odd and even signal fields generated by at least one camera are recorded, whereas only odd fields or only even fields generated by the other cameras are recorded. Odd and even signal field streams may be derived from a single stream of demodulated video signals, or from respective demodulation streams.

Selon cette invention, une unité d'enregistrement de données numériques vidéo reçoit des flux de signaux vidéo entrants qui proviennent depuis seize caméras au maximum (42). Les flux de signaux sont convertis sélectivement en signaux numériques vidéo (56-1, 56-2) stockés sur un dispositif de stockage de données tel qu'un disque dur (62). L'appareil est commandé de manière à enregistrer les champs de signaux pairs et impairs générés par au moins une caméra alors qu'on n'enregistre que les champs de signaux pairs ou impairs générés par les autres caméras. Les flux de champs de signaux pairs et impairs peuvent être dérivés à partir d'un flux unique de signaux vidéo démodulés ou à partir des flux de démodulation respectifs.

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