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Browse by Category: Main > Information Technology
Class Information
Number: 380/209
Name: Cryptography > Video cryptography > Video electric signal masking > Masking signal selectively addressed
Description: Subject matter wherein an interfering signal is directed to a particular subscriber.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8553881 Composite masking system and method for improving invisibility of high-definition video watermarking Oct. 8, 2013
8223964 Three-dimensional authentication of mircoparticle mark Jul. 17, 2012
8204929 Hiding sensitive information Jun. 19, 2012
8094818 Method to synthesize video copy protection signals Jan. 10, 2012
7940930 Native scrambling system May. 10, 2011
7853121 Recording medium, reproduction device, program, and reproduction method Dec. 14, 2010
7831042 Three-dimensional authentication of microparticle mark Nov. 9, 2010
7817902 Apparatus and method of generating video-reproducing clock signal from 480p signal Oct. 19, 2010
7765402 System and methods for the wireless delivery of a message Jul. 27, 2010
7646963 Information processing apparatus, information processing method and presentation medium Jan. 12, 2010
7646869 System for copy protection of an information carrier Jan. 12, 2010
7391866 Broadcast apparatus and reception apparatus for providing a storage service by which scrambled content is stored and descrambled using scrambling key list Jun. 24, 2008
7389420 Content authentication and recovery using digital watermarks Jun. 17, 2008
7340059 Programmable scrambler and De-scrambler for digital telephony equipment Mar. 4, 2008
7233670 Signal tracing system and method Jun. 19, 2007
7043022 Packet order determining method and apparatus May. 9, 2006
6928162 Method and system for manipulating and telescoping a hash function Aug. 9, 2005
6925342 System and method for protecting digital media Aug. 2, 2005
6839433 Method and apparatus for generating a signal that defeats illegal cable decoders Jan. 4, 2005
6792111 Cryptation system for packet switching networks based on digital chaotic models Sep. 14, 2004
6754347 Input/output unit, input/output method, and receiving unit Jun. 22, 2004
6633982 Method and process for managing ultra secure electronic distribution of digital movies to commercial exhibitors Oct. 14, 2003
6275509 Masked signal transceiver Aug. 14, 2001
6215875 Cipher processing system Apr. 10, 2001
6188870 Passive interdiction system for scrambling Feb. 13, 2001
5621792 Method and system of controlling the mode of access to signals, in particular picture signals Apr. 15, 1997
5467397 Interdiction method and apparatus with variable dwell time Nov. 14, 1995
5463689 Interdiction method and apparatus with random mode jamming Oct. 31, 1995
5361301 Interdiction method and apparatus with direct memory control of variable frequency elements Nov. 1, 1994
5355410 Method and apparatus for multi-tire time shared CATV jamming Oct. 11, 1994
5341424 Interdiction method and apparatus with frequency change inhibit function Aug. 23, 1994
5323462 CATV subscriber disconnect switch Jun. 21, 1994
5317635 Interdiction method and apparatus with mode control for variable frequency elements May. 31, 1994
5289541 Interdiction method and apparatus with constant blanking and variable dwell times Feb. 22, 1994
5278908 Interdiction method and apparatus with programmable jamming effectiveness Jan. 11, 1994
5276734 Oscillator system Jan. 4, 1994
5265160 Interdiction method and apparatus with pulsed mode jamming Nov. 23, 1993
5255318 Expandable cable television subscriber control system Oct. 19, 1993
5243651 Diagnostic method and apparatus for a cable television interdiction system Sep. 7, 1993
5233652 Selective off-premises jamming for premium CATV service Aug. 3, 1993
5228082 Jamming signal producing system in CATV Jul. 13, 1993
5142574 Optimum amplitude and frequency of jamming carrier in interdiction program denial system Aug. 25, 1992
5140633 Cable subscriber control device using shared jamming modules Aug. 18, 1992
5014309 Off-premises cable television channel interdiction method and apparatus May. 7, 1991
4912760 Off-premises cable television channel interdiction method and apparatus Mar. 27, 1990
4837820 Hybrid CATV scrambling system Jun. 6, 1989
4825468 Video noise jammer Apr. 25, 1989
4792971 Selective viewing control system for CATV Dec. 20, 1988
4769838 Community antenna television reception controlling apparatus Sep. 6, 1988
4737990 Unauthorized channel jamming signal applying method for CATV system Apr. 12, 1988

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