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Class Information
Number: 380/225
Name: Cryptography > Video cryptography > Video electric signal modification (e.g., scrambling) > By modifying synchronizing signal > Self-synchronizing circuit at receiver
Description: Subject matter wherein the synchronizing component is regenerated by a circuit detecting a nonstandard timing characteristic of the modified video signal.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8594575 Shifted channel characteristics for mitigating co-channel interference Nov. 26, 2013
8559625 Elliptic curve point transformations Oct. 15, 2013
8543842 System and methods for secure transaction management and electronics rights protection Sep. 24, 2013
8515389 Method, apparatus, and program product for provisioning secure wireless sensors Aug. 20, 2013
8478981 Method of adding a postscript message to an email Jul. 2, 2013
8396215 Signal transmission apparatus and signal transmission method Mar. 12, 2013
8300813 Secure information transfer based on global position Oct. 30, 2012
8184812 Secure computing device with monotonic counter and method therefor May. 22, 2012
8130963 Method and apparatus for secure key delivery for decrypting bulk digital content files at an unsecure site Mar. 6, 2012
7945925 Copy protection May. 17, 2011
7930360 Secure processing unit systems and methods Apr. 19, 2011
7831044 Data processing device Nov. 9, 2010
7813505 Sequence number synchronization for ciphering Oct. 12, 2010
7797191 Promotional event tracking system Sep. 14, 2010
7770024 Security message authentication instruction Aug. 3, 2010
7715559 Crypto-synchronization for secure communication May. 11, 2010
7706533 Copy protection for video signal using narrowed horizontal synchronization signals Apr. 27, 2010
7583802 Method for using a synchronous sampling design in a fixed-rate sampling mode Sep. 1, 2009
7545939 Control 3 signal synthesis Jun. 9, 2009
7502472 Encryption system and method for encrypting/decrypting sensitive data Mar. 10, 2009
7471795 Information transmission system Dec. 30, 2008
7450718 One-way synchronization of a two-way QKD system Nov. 11, 2008
7430585 Secure processing unit systems and methods Sep. 30, 2008
7376826 Methods and apparatus for performing encryption and authentication May. 20, 2008
7356710 Security message authentication control instruction Apr. 8, 2008
7324648 Method and apparatus for secure key delivery for decrypting bulk digital content files at an unsecure site Jan. 29, 2008
7240366 End-to-end authentication of session initiation protocol messages using certificates Jul. 3, 2007
7020638 System and method for flexible micropayment of low value electronic assets Mar. 28, 2006
6654885 Method for authorization checking and configuration for carrying out the method Nov. 25, 2003
6633982 Method and process for managing ultra secure electronic distribution of digital movies to commercial exhibitors Oct. 14, 2003
6363150 Billing method for customers having IP telephony service with multiple levels of security Mar. 26, 2002
5644637 Method and apparatus for recovering synchronizing signals in scrambled television pictures Jul. 1, 1997
5271043 Device and method for the data transmission or storage optimizing the use of the pass-band Dec. 14, 1993
5166976 System and method for detection of a pulse within a video signal Nov. 24, 1992
5133009 Method and apparatus for defeating the operation of an IC built-in noise inverter Jul. 21, 1992
5113440 Universal decoder May. 12, 1992
5113439 CATV terminal and video apparatus having a noise eliminating circuit May. 12, 1992
5029340 CATV terminal unit having an improved descrambling operation Jul. 2, 1991
4852164 Pulse generating apparatus Jul. 25, 1989
4827511 Automatic gain control circuit for controlling gain of video signal in television receiver May. 2, 1989
4790011 Auto clamp for modulator for suppressed sync signals Dec. 6, 1988
4718086 AGC in sound channel of system for processing a scrambled video signal Jan. 5, 1988
4712237 Method and apparatus for unscrambling sync-suppressed television signals Dec. 8, 1987
4706285 Automatic gain control of a scrambled video signal Nov. 10, 1987
4703354 Non-linear sync signal processing circuit Oct. 27, 1987
4688097 D.C.-coupled video clamping circuit Aug. 18, 1987
4667232 Synchronizing pulse restoration circuit May. 19, 1987
4571615 Timing generator for sync suppressed television signals Feb. 18, 1986
4562465 Adaptive video descrambling system Dec. 31, 1985
4558360 Decoder lockout defeat circuit Dec. 10, 1985

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