Encryption of digital video

Encryption of digital video

The invention is concerned with preventing unauthorise copying when using a digital interface according to ITU/R Recomendation 656. To inhibit unauthorised copying, the standard timing reference signals in a Rec 656 digital video signal are stripped out and replaced by a single timing reference per...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: PAUL GORDON ROBERTSON
Format: Patent
Sprache:eng
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Beschreibung
Zusammenfassung:The invention is concerned with preventing unauthorise copying when using a digital interface according to ITU/R Recomendation 656. To inhibit unauthorised copying, the standard timing reference signals in a Rec 656 digital video signal are stripped out and replaced by a single timing reference per frame. Authorised equipment contains the processing to reconstruct the necessary timing from these timing references. Additionally, the digital words can be scrambled by bit re-ordering.