Recording/reproducing method and apparatus, processing...

Details Recording/reproducing method and apparatus, processing... Recording/reproducing method and apparatus, processing...

H - Electricity

04

N

H04N 5/91 (2006.01) G06T 1/00 (2006.01) G11B 20/00 (2006.01) G11B 23/28 (2006.01) H04N 5/913 (2006.01) H04N 5/92 (2006.01)

Patent

CA 2247213

Electronic watermark information obtained by changing a luminance value of a luminance signal in a video signal and a copy generation management signal (CGMS signal) inserted into an area out of a scan region of the video signal are recorded into a recording medium. A reproducing apparatus comprises an electronic watermark information detecting circuit, a CGMS signal detecting circuit; a control circuit to which detected electronic watermark information and CGMS signal are supplied, and a video signal processing circuit controlled by an output of the control circuit. When the electronic watermark information and the CGMS signal have a rational relation, the video signal processing circuit is controlled to output the video signal.

Des informations en filigrane électronique obtenues par modification de la luminance dans un signal de luminance incorporé à un signal vidéo et à un signal de gestion de production de copies introduit dans une zone de balayage du signal vidéo sont enregistrées sur un support d'enregistrement. L'appareil de reproduction de cette information comprend un circuit détecteur d'informations en filigrane électronique, un circuit de détection de signaux de gestion de production de copies, un circuit de commande auquel sont transmis les informations en filigrane électronique et le signal de gestion de production de copies, et un signal de traitement de signaux vidéo commandé par le signal de sortie du circuit de commande. Quand les informations en filigrane électronique et le signal de gestion de production de copies sont en relation rationnelle, le circuit de traitement de signaux vidéo produit le signal vidéo.

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