Method and apparatus for synthesizing a copy protection or content control signal with improved playability of a TV set

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United States of America Patent

PATENT NO 8526794
APP PUB NO 20090052866A1
SERIAL NO

12221817

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Playability of a copy protected video signal is improved by reducing the darkening and or venetian blind effects which tend to cause artifacts in a video signal display. To this end, the copy protection signal includes automatic gain control (AGC) signals or pulses in video lines in a portion of the active or viewable video field or frame, wherein the AGC pulses comprise non similar AGC signals from one video line to another video line. The dis-similar AGC pulses may include pulses which are deleted, blanked, attenuated, pulse width modified, modulated, etc. In addition, selected sync pulses may be pulse width, amplitude and or position modified.

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Patent Owner(s)

  • ROVI SOLUTIONS CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Quan, Ronald Cupertino, US 148 1682

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