CA2417176C - Methode amelioree de protection des enregistrements video contre les duplications qui introduit des distorsions horizontales et verticales dans les images - Google Patents

Methode amelioree de protection des enregistrements video contre les duplications qui introduit des distorsions horizontales et verticales dans les images Download PDF

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Publication number
CA2417176C
CA2417176C CA002417176A CA2417176A CA2417176C CA 2417176 C CA2417176 C CA 2417176C CA 002417176 A CA002417176 A CA 002417176A CA 2417176 A CA2417176 A CA 2417176A CA 2417176 C CA2417176 C CA 2417176C
Authority
CA
Canada
Prior art keywords
sync
pulses
video
signal
vertical
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.)
Expired - Lifetime
Application number
CA002417176A
Other languages
English (en)
Other versions
CA2417176A1 (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.)
Gemstar Development LLC
Adeia Media LLC
Adeia Guides Inc
Adeia Solutions LLC
Original Assignee
Macrovision Corp
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 Corp filed Critical Macrovision Corp
Publication of CA2417176A1 publication Critical patent/CA2417176A1/fr
Application granted granted Critical
Publication of CA2417176C publication Critical patent/CA2417176C/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Television Signal Processing For Recording (AREA)
CA002417176A 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 Expired - Lifetime CA2417176C (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
CA2417176A1 CA2417176A1 (fr) 1994-11-24
CA2417176C true CA2417176C (fr) 2005-02-01

Family

ID=25678207

Family Applications (3)

Application Number Title Priority Date Filing Date
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
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
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

Family Applications Before (2)

Application Number Title Priority Date Filing Date
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
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) CA2417180C (fr)

Also Published As

Publication number Publication date
CA2417180A1 (fr) 1994-11-24
CA2476252A1 (fr) 1994-11-24
CA2417176A1 (fr) 1994-11-24
CA2417180C (fr) 2005-08-02
CA2476252C (fr) 2005-04-05

Similar Documents

Publication Publication Date Title
US5748733A (en) Method and apparatus to reduce effects of certain copy protection purses within a video signal
CA2417176C (fr) Methode amelioree de protection des enregistrements video contre les duplications qui introduit des distorsions horizontales et verticales dans les images
AU702665B2 (en) Video copy protection process enhancement to introduce horizontal and vertical picture distortions
NZ328313A (en) Enhancing copy protection of video signal: narrowing of line synchronisation pulses

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Effective date: 20140509