CA2417180A1 - Methode et dispositif pour reduire le processus de protection contre la copie par une augmentation relative dans de synchronisation composite - Google Patents

Methode et dispositif pour reduire le processus de protection contre la copie par une augmentation relative dans de synchronisation composite Download PDF

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Publication number
CA2417180A1
CA2417180A1 CA002417180A CA2417180A CA2417180A1 CA 2417180 A1 CA2417180 A1 CA 2417180A1 CA 002417180 A CA002417180 A CA 002417180A CA 2417180 A CA2417180 A CA 2417180A CA 2417180 A1 CA2417180 A1 CA 2417180A1
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CA
Canada
Prior art keywords
picture
vertical
horizontal
enhancements
video
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002417180A
Other languages
English (en)
Other versions
CA2417180C (fr
Inventor
Ronald Quan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rovi Corp
Original Assignee
Macrovision Corporation
Wonfor, Peter J.
Knox, Alistair J.
Corcoran, Jeremy J.
Ryan, John O.
Ronald Quan
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/062,866 external-priority patent/US5583936A/en
Application filed by Macrovision Corporation, Wonfor, Peter J., Knox, Alistair J., Corcoran, Jeremy J., Ryan, John O., Ronald Quan filed Critical Macrovision Corporation
Publication of CA2417180A1 publication Critical patent/CA2417180A1/fr
Application granted granted Critical
Publication of CA2417180C publication Critical patent/CA2417180C/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Television Signal Processing For Recording (AREA)
CA002417180A 1993-05-17 1994-05-09 Methode et dispositif pour reduire le processus de protection contre la copie par une augmentation relative dans de synchronisation composite Expired - Lifetime CA2417180C (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/062,866 US5583936A (en) 1993-05-17 1993-05-17 Video copy protection process enhancement to introduce horizontal and vertical picture distortions
US062,866 1993-05-17
CA002162367A CA2162367C (fr) 1993-05-17 1994-05-09 Methode amelioree de protection des enregistrements video contre les duplications qui introduit des distorsions horizontales et verticales dans les images

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002162367A Division CA2162367C (fr) 1993-05-17 1994-05-09 Methode amelioree de protection des enregistrements video contre les duplications qui introduit des distorsions horizontales et verticales dans les images

Publications (2)

Publication Number Publication Date
CA2417180A1 true CA2417180A1 (fr) 1994-11-24
CA2417180C CA2417180C (fr) 2005-08-02

Family

ID=25678207

Family Applications (3)

Application Number Title Priority Date Filing Date
CA002417176A Expired - Lifetime CA2417176C (fr) 1993-05-17 1994-05-09 Methode amelioree de protection des enregistrements video contre les duplications qui introduit des distorsions horizontales et verticales dans les images
CA002476252A Expired - Lifetime CA2476252C (fr) 1993-05-17 1994-05-09 Methode amelioree de protection des enregistrements video contre les duplications qui introduit des distorsions horizontales et verticales dans les images
CA002417180A Expired - Lifetime CA2417180C (fr) 1993-05-17 1994-05-09 Methode et dispositif pour reduire le processus de protection contre la copie par une augmentation relative dans de synchronisation composite

Family Applications Before (2)

Application Number Title Priority Date Filing Date
CA002417176A Expired - Lifetime CA2417176C (fr) 1993-05-17 1994-05-09 Methode amelioree de protection des enregistrements video contre les duplications qui introduit des distorsions horizontales et verticales dans les images
CA002476252A Expired - Lifetime CA2476252C (fr) 1993-05-17 1994-05-09 Methode amelioree de protection des enregistrements video contre les duplications qui introduit des distorsions horizontales et verticales dans les images

Country Status (1)

Country Link
CA (3) CA2417176C (fr)

Also Published As

Publication number Publication date
CA2417180C (fr) 2005-08-02
CA2417176C (fr) 2005-02-01
CA2476252C (fr) 2005-04-05
CA2476252A1 (fr) 1994-11-24
CA2417176A1 (fr) 1994-11-24

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Effective date: 20140509