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Class Information
Number: 380/235
Name: Cryptography > Video cryptography > Video electric signal modification (e.g., scrambling) > Phase inversion of scan line information
Description: Subject matter which inverts the phase of selected video scan line information signals.










Patents under this class:

Patent Number Title Of Patent Date Issued
7966498 Data outputting method, data outputting apparatus, data reproducing method, data reproducing apparatus, data recording method, data recording apparatus, and record medium Jun. 21, 2011
7962764 Data outputting method, data outputting apparatus, data reproducing method, data reproducing apparatus, data recording method, data recording apparatus, and record medium Jun. 14, 2011
7945046 Decryption processing apparatus, decryption method and image forming apparatus May. 17, 2011
7587756 Methods and apparatus for a secure proximity integrated circuit card transactions Sep. 8, 2009
7424739 On-machine communication verification Sep. 9, 2008
7082198 Data receiving method and data receiving unit therefor Jul. 25, 2006
6971012 Motion picture electronic watermark system Nov. 29, 2005
6771794 Electronic watermark generating apparatus, electronic watermark generating method and memory medium therefor Aug. 3, 2004
6510229 Communication system with multicarrier telephony transport Jan. 21, 2003
5848154 Apparatus for managing software using quantity Dec. 8, 1998
5491748 Enhanced security for a cable system Feb. 13, 1996
5185794 System and method for scrambling and/or descrambling a video signal Feb. 9, 1993
5060262 Video scrambling, audio masking and data transmission methods for wireless cable systems Oct. 22, 1991
4759061 Technique for toggling coding mode in a television signal encoder Jul. 19, 1988
4742545 Video picture signal scrambling system May. 3, 1988
4700388 Apparatus for scrambling a television signal Oct. 13, 1987
4679235 Television signal transmission system Jul. 7, 1987
4635113 Apparatus for descrambling transmitted scrambled television signals Jan. 6, 1987
4628358 Television signal encryption system with protected audio Dec. 9, 1986
4613902 Method of broadcasting an encoded video signal and a receiving apparatus for decoding the signal Sep. 23, 1986
4599648 Video signal transmission systems Jul. 8, 1986
4598318 Video encryption system Jul. 1, 1986
RE31735 Subscriber-limited reception television broadcast security encoder-decoder system Nov. 13, 1984
4471379 Codified field polarity television system Sep. 11, 1984
4463376 Television signal processing system for a wireless pay system Jul. 31, 1984
4454543 Dynamic video scrambling Jun. 12, 1984
4447828 Phase change dynamic scrambling May. 8, 1984
4429331 Video cipher processing system Jan. 31, 1984
4389671 Digitally-controlled analog encrypton Jun. 21, 1983
4387393 Signal unscrambler Jun. 7, 1983
4369462 Coding system for pay television Jan. 18, 1983
4336554 Code signal blanking apparatus Jun. 22, 1982
4308556 Television video signal scrambling system Dec. 29, 1981
4307416 Television signal modification apparatus Dec. 22, 1981
4257065 Video clamp and inverter circuit Mar. 17, 1981
4245246 Pay TV system Jan. 13, 1981
4215366 Subscriber-limited reception television broadcast security encoder-decoder system Jul. 29, 1980
4091417 Decoder mode validation apparatus for pay television systems May. 23, 1978
4045814 Method and apparatus for scrambling and unscrambling communication signals Aug. 30, 1977
4025948 Coding system for pay television apparatus May. 24, 1977
4024576 Method and apparatus for scrambling and unscrambling communication signals May. 17, 1977
4024574 Validation method and apparatus for pay television systems May. 17, 1977
4022972 Transient suppression and grey level coincidence in a subscription television system May. 10, 1977
4019201 Method and apparatus for scrambling and unscrambling communication signals Apr. 19, 1977
3996418 Scrambler and decoder for secure television system Dec. 7, 1976
3936593 Scrambler and decoder for a television signal Feb. 3, 1976











 
 
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