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Class Information
Number: 380/276
Name: Cryptography > Communication system using cryptography > Speech scrambler detail > Including sampling
Description: Subject matter wherein a sequence of signal representations are obtained at discrete time intervals.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8619996 Apparatus and method for transmitting digital multimedia broadcasting data, and method and apparatus for receiving digital multimedia broadcasting data Dec. 31, 2013
8433582 Method and apparatus for estimating high-band energy in a bandwidth extension system Apr. 30, 2013
8412784 Storage model for maintaining structured document fidelity Apr. 2, 2013
8355514 Audio encoding to convey auxiliary information, and media embodying same Jan. 15, 2013
8165300 System and method for generalized authentication Apr. 24, 2012
8112315 System and method for an electronic gift key Feb. 7, 2012
8098693 Method of early starting the operation of a descrambler Jan. 17, 2012
7620185 Preview of payable broadcasts Nov. 17, 2009
7340059 Programmable scrambler and De-scrambler for digital telephony equipment Mar. 4, 2008
7269564 Method and apparatus to indicate an encoding status for digital content Sep. 11, 2007
7088825 Low I/O bandwidth method and system for implementing detection and identification of scrambling codes Aug. 8, 2006
6690795 Multiple keys for decrypting data in restricted-access television system Feb. 10, 2004
6658113 Apparatus and method for concealing data bursts in an analog scrambler using audio repetition Dec. 2, 2003
6658112 Voice decoder and method for detecting channel errors using spectral energy evolution Dec. 2, 2003
6498851 Data encryption and signal scrambling using programmable data conversion arrays Dec. 24, 2002
6272633 Methods and apparatus for transmitting, receiving, and processing secure voice over internet protocol Aug. 7, 2001
6266412 Encrypting speech coder Jul. 24, 2001
6131160 Method and apparatus for an adapter card providing conditional access in a communication system Oct. 10, 2000
6078666 Audio signal processing method and related device with block order switching Jun. 20, 2000
6078668 Apparatus and method for concealing data bursts in an analog scrambler using audio repetition Jun. 20, 2000
5949878 Method and apparatus for providing voice privacy in electronic communication systems Sep. 7, 1999
5930365 Digital data shuffling/de-shuffling system Jul. 27, 1999
5796838 Method and apparatus for performing frequency spectrum inversion Aug. 18, 1998
5787180 Method of connecting a scrambler or encryption device to a hand-held portable cellular telephone Jul. 28, 1998
5778073 Method and device for speech encryption and decryption in voice transmission Jul. 7, 1998
5768374 Apparatus and method for continuous scrambling while transmitting or receiving synchronization data Jun. 16, 1998
5712905 Sequential digital profile for processing analog signals Jan. 27, 1998
5668879 Audio scrambling system for scrambling and descrambling audio signals Sep. 16, 1997
5488663 Encoding methods for generating a digital signal containing modulated bit allocation information, and record carriers containing that signal Jan. 30, 1996
5454040 Digital control of analog systems Sep. 26, 1995
5412719 Radio paging system with voice transfer function and radio pager May. 2, 1995
5410599 Voice and data encryption device Apr. 25, 1995
5375171 Transmission system, and transmitter and receiver used in the transmission system for transmitting and receiving digital signals containing modulated bit allocation information Dec. 20, 1994
5199074 Encryption system Mar. 30, 1993
5101432 Signal encryption Mar. 31, 1992
5091941 Secure voice data transmission system Feb. 25, 1992
4969191 Fully digital phase-locked loop Nov. 6, 1990
4953211 Encryption apparatus Aug. 28, 1990
4949378 Toy helmet for scrambled communications Aug. 14, 1990
4841571 Privacy signal transmission system Jun. 20, 1989
4837821 Signal transmission system having encoder/decoder without frame synchronization signal Jun. 6, 1989
4823380 Voice changer Apr. 18, 1989
4817141 Confidential communication system Mar. 28, 1989
4773092 Speech scramblers Sep. 20, 1988
4771455 Scrambling apparatus Sep. 13, 1988
4750205 Frequency or time domain speech scrambling technique and system which does not require any frame synchronization Jun. 7, 1988
4747137 Speech scrambler May. 24, 1988
4742543 Video transmission system May. 3, 1988
4706282 Decoder for a recorder-decoder system Nov. 10, 1987
4591673 Frequency or time domain speech scrambling technique and system which does not require any frame synchronization May. 27, 1986

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