Video information recording apparatus and reproducing apparatus

Details Video information recording apparatus and reproducing apparatus Video information recording apparatus and reproducing apparatus

H - Electricity

04

N

H04N 5/91 (2006.01) G06T 1/00 (2006.01) G11B 19/12 (2006.01) G11B 20/00 (2006.01) G11B 20/10 (2006.01) G11B 27/034 (2006.01) G11B 27/32 (2006.01) H04N 5/913 (2006.01)

Patent

CA 2422358

A method for recording video information for controlling video information copy limit information when copying data recorded on a recording medium to another recording medium. By detecting copy limit information (CCI) or a watermark (WM) of an AV stream to be input, it is checked whether the content of the copy limit information or the watermark has been changed. Change point information of the copy limit information or the watermark and the content of the copy limit information or the watermark are fetched. According to the change point information fetched, control information is generated for controlling the copy limit information. When the input signal has ended, a code for preventing altering is calculated, it is confirmed that the copy limit information or the watermark has not been altered, and the control information generated is recorded together with the video information to the recording medium of copy destination.

L'invention porte sur un procédé d'enregistrement d'information vidéo afin de commander l'information de limitation de copie d'information vidéo lorsque les données enregistrées sur un support d'enregistrement sont copiés sur un autre support d'enregistrement. Grâce à l'information de limitation de copie CCI ou un filigrane WM d'un flux AV à entrer on vérifie si le contenu de l'information de la limitation de copie ou le filigrane ont été modifiés. L'information de point de modification de l'information de la limitation de copie ou du filigrane et le contenu de l'information de limitation de copie ou du filigrane sont amorcés. Selon l'information de point de modification amorcée, l'information de commande est générée afin de commander l'information de limitation de copie. Lorsque le signal d'entrée a abouti, on calcule un code de prévention de modification, qui confirme que l'information de limitation de copie ou le filigrane n'a pas été modifié(e), et l'information de commande générée est enregistrée avec l'information de vidéo sur le support d'enregistrement de destination de la copie.

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