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Class Information
Number: 380/213
Name: Cryptography > Video cryptography > Video electric signal modification (e.g., scrambling) > Chrominance scrambling
Description: Subject matter wherein the portion of a video signal which conveys color information is modified.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8397275 Time-varying sequenced image overlays for CAPTCHA Mar. 12, 2013
8311220 AV data transmission apparatus and AV data transmission method Nov. 13, 2012
8276195 Management of split audio/video streams Sep. 25, 2012
7899182 Digital broadcast reception apparatus Mar. 1, 2011
7634089 Cinema anti-piracy measures Dec. 15, 2009
7580526 Methods and apparatus for protecting signals transmitted between a source and destination device over multiple signals lines Aug. 25, 2009
7545937 Chrominance processing arrangement having immunity to colorstripe encoding Jun. 9, 2009
7447315 System for determining successful reception of a message Nov. 4, 2008
7400727 Information embedding method, information extracting method, information embedding apparatus, information extracting apparatus, and recording media Jul. 15, 2008
7398540 System and method for tuning channels using a central point of control Jul. 8, 2008
7362861 Methods and apparatus for protecting information content Apr. 22, 2008
7319755 Image altering apparatus and method for providing confidential viewing of a fundamental display image Jan. 15, 2008
7286668 Method of protecting copyright of digital video work Oct. 23, 2007
7224798 Methods and apparatus for providing a partial dual-encrypted stream in a conditional access overlay system May. 29, 2007
7221761 Error resilient digital video scrambling May. 22, 2007
7212635 Image processing apparatus, control method thereof, and image processing system May. 1, 2007
7136485 Packetizing devices for scalable data streaming Nov. 14, 2006
7046818 Standards compliant watermarking for access management May. 16, 2006
7018045 Image display apparatus and image display method Mar. 28, 2006
6996236 Methods and apparatus for protecting signals transmitted between a source and destination device over multiple signal lines Feb. 7, 2006
6983050 Methods and apparatus for protecting information content Jan. 3, 2006
6925181 Method of protecting high definition video signal Aug. 2, 2005
6888943 Multimedia adaptive scrambling system (MASS) May. 3, 2005
6826281 Storage-encryption-retrieval device and method with resulting business processes Nov. 30, 2004
6570990 Method of protecting high definition video signal May. 27, 2003
6459795 Method and apparatus for enhancing the scrambling of a TV signal via erroneous clamp signals Oct. 1, 2002
6349139 Method and apparatus for minimizing chroma subcarrier instability caused by a video line scrambling system Feb. 19, 2002
6222978 Video signal copy guard apparatus and method Apr. 24, 2001
6212325 Method and apparatus for processing video signal and storage medium Apr. 3, 2001
6091822 Method and apparatus for recording scrambled video audio signals and playing back said video signal, descrambled, within a secure environment Jul. 18, 2000
6021196 Reference palette embedding Feb. 1, 2000
6018608 Method of generating information used for the copy protecting signal and apparatus using the same Jan. 25, 2000
5930360 Method of scrambling three-dimensional image Jul. 27, 1999
5883959 Video copy protection Mar. 16, 1999
5784523 Method and apparatus for defeating effects of color burst modifications to a video signal Jul. 21, 1998
5764764 Video signal format converting circuit Jun. 9, 1998
5761304 Video signal format converting circuit Jun. 2, 1998
5657387 Video signal format converting circuit Aug. 12, 1997
5651065 Insertion of supplemental burst into video signals to thwart piracy and/or carry data Jul. 22, 1997
5608799 Method and apparatus for scrambling and descrambling of video signal with edge fill Mar. 4, 1997
5590194 Method of and apparatus for scrambling a video signal with full network transmission and recording capability Dec. 31, 1996
5581613 Color image processing apparatus and method Dec. 3, 1996
5555305 Method and apparatus for secure transmission of video signals Sep. 10, 1996
5504815 Method and apparatus for scrambling and descrambling Apr. 2, 1996
5212723 Burst phase correction system for video descrambling May. 18, 1993
5161188 Scrambling video by horizontal and vertical time shifting Nov. 3, 1992
5146496 Method and apparatus for enhancing the security of a scrambled television signal Sep. 8, 1992
5003592 Scrambling video by time shifting Mar. 26, 1991
4953208 CATV system transmitting a scrambled television signal Aug. 28, 1990
4901349 Time dispersal encryption of TV signals Feb. 13, 1990

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