MY120234A - Method and apparatus for modifying the envelope of a rf carrier signal to remove copy protection signals therefrom - Google Patents
Method and apparatus for modifying the envelope of a rf carrier signal to remove copy protection signals therefromInfo
- Publication number
- MY120234A MY120234A MYPI9803522A MY120234A MY 120234 A MY120234 A MY 120234A MY PI9803522 A MYPI9803522 A MY PI9803522A MY 120234 A MY120234 A MY 120234A
- Authority
- MY
- Malaysia
- Prior art keywords
- copy protection
- protection signals
- carrier signal
- disclosed
- domain
- Prior art date
Links
Landscapes
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
A METHOD AND APPARATUS IS DISCLOSED FOR DISABLING THE EFFECT OF COPY PROTECTION SIGNALS EMBEDDED IN VIDEO SIGNALS, WHEREIN THE DETECTION AND MODIFICATION OF THE COPY PROTECTION SIGNALS IS ACCOMPLISHED IN THE RF DOMAIN RATHER THAN IN THE BASEBAND VIDEO DOMAIN AS TYPICALLY ACCOMPLISHED AT THE PRESENT TIME. TO THIS END, VARIOUS EMBODIMENTS ARE DISCLOSED FOR DERIVING A TIMING CONTROL SIGNAL FROM THE MODULATED RF CARRIER SIGNAL, WHICH TIMING CONTROL SIGNAL IS INDICATIVE OF THE TELEVISION LINES WHICH CONTAIN THE COPY PROTECTION SIGNALS. SEVERAL TECHNIQUES IN THE RF DOMAIN RESPONSIVE TO THE TIMING CONTROL SIGNAL ARE DISCLOSED FOR REPLACING, ATTENUATING, SUPPRESSING, PULSE NARROWING OR OTHERWISE MODIFYING THE MODULATED RF CARRIER SIGNAL DURING THE INTERVAL OF THE COPY PROTECTION SIGNALS TO DISABLE THE AFFECTS THEREOF, TO ALLOW THE MAKING OF ACCEPTABLE RECORDINGS DURING DEMODULATION SUBSEQUENTLY BY, FOR EXAMPLE, A RECORD VCR. ALSO DISCLOSED ARE MEANS FOR ADDING COPY PROTECTION SIGNALS TO AN RF CARRIER SIGNAL MODULATED WITH A VIDEO SIGNAL BY MODULATING, FOR EXAMPLE, THE PROTECTION SIGNALS ONTO THE RF CARRIER SIGNAL IN THE RF DOMAIN.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MYPI9803522 MY120234A (en) | 1998-07-31 | 1998-07-31 | Method and apparatus for modifying the envelope of a rf carrier signal to remove copy protection signals therefrom |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MYPI9803522 MY120234A (en) | 1998-07-31 | 1998-07-31 | Method and apparatus for modifying the envelope of a rf carrier signal to remove copy protection signals therefrom |
Publications (1)
Publication Number | Publication Date |
---|---|
MY120234A true MY120234A (en) | 2005-09-30 |
Family
ID=47227338
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MYPI9803522 MY120234A (en) | 1998-07-31 | 1998-07-31 | Method and apparatus for modifying the envelope of a rf carrier signal to remove copy protection signals therefrom |
Country Status (1)
Country | Link |
---|---|
MY (1) | MY120234A (en) |
-
1998
- 1998-07-31 MY MYPI9803522 patent/MY120234A/en unknown
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