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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:
| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 6658112 |
Voice decoder and method for detecting channel errors using spectral energy evolution |
Dec. 2, 2003 |
| 6658113 |
Apparatus and method for concealing data bursts in an analog scrambler using audio repetition |
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 |
| 6078668 |
Apparatus and method for concealing data bursts in an analog scrambler using audio repetition |
Jun. 20, 2000 |
| 6078666 |
Audio signal processing method and related device with block order switching |
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 |
| 4550222 |
Process for interception-protected frequency band compressed transmission of speech signals |
Oct. 29, 1985 |
| 4443660 |
System and method for encrypting a voice signal |
Apr. 17, 1984 |
| 4433211 |
Privacy communication system employing time/frequency transformation |
Feb. 21, 1984 |
| 4398062 |
Apparatus for privacy transmission in system having bandwidth constraint |
Aug. 9, 1983 |
| 4379205 |
Analog signal scrambling system |
Apr. 5, 1983 |
| 4330689 |
Multirate digital voice communication processor |
May. 18, 1982 |
| 4318125 |
Solid state digital audio scrambler system for teletransmission of audio intelligence through a television system |
Mar. 2, 1982 |
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