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Class Information
Number: 380/275
Name: Cryptography > Communication system using cryptography > Speech scrambler detail
Description: Subject matter wherein a signal representative of speech is made unintelligible.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7362867 |
Apparatus and method for generating scrambling code in UMTS mobile communication system |
Apr. 22, 2008 |
| 7308104 |
Forward multiple scrambling code generating method and apparatus |
Dec. 11, 2007 |
| 7184952 |
Method and system for masking speech |
Feb. 27, 2007 |
| 7143028 |
Method and system for masking speech |
Nov. 28, 2006 |
| 7120255 |
Java applications for secured palm held cellular communications |
Oct. 10, 2006 |
| 7046809 |
Device and method for scrambling/descrambling voice and data for mobile communication system |
May. 16, 2006 |
| 7047405 |
Method and apparatus for providing secure processing and data storage for a wireless communication device |
May. 16, 2006 |
| 6996237 |
Apparatus and methods for including codes in audio signals |
Feb. 7, 2006 |
| 6961431 |
Analog privacy scrambler and scrambling method |
Nov. 1, 2005 |
| 6907123 |
Secure voice communication system |
Jun. 14, 2005 |
| 6658112 |
Voice decoder and method for detecting channel errors using spectral energy evolution |
Dec. 2, 2003 |
| 6421445 |
Apparatus and methods for including codes in audio signals |
Jul. 16, 2002 |
| 6356638 |
Radio wireline interface and method for secure communication |
Mar. 12, 2002 |
| 6339646 |
Slotted mode code usage in a cellular communications system |
Jan. 15, 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 |
| 6266418 |
Encryption and authentication methods and apparatus for securing telephone communications |
Jul. 24, 2001 |
| 6260143 |
Host-based caching method and system for copy protected content |
Jul. 10, 2001 |
| 6256491 |
Voice security between a composite channel telephone communications link and a telephone |
Jul. 3, 2001 |
| 6078668 |
Apparatus and method for concealing data bursts in an analog scrambler using audio repetition |
Jun. 20, 2000 |
| 5852662 |
Scrambler bypass system |
Dec. 22, 1998 |
| 5784422 |
Apparatus and method for accurate synchronization with inbound data packets at relatively low sampling rates |
Jul. 21, 1998 |
| 5764763 |
Apparatus and methods for including codes in audio signals and decoding |
Jun. 9, 1998 |
| 5742679 |
Optimized simultaneous audio and data transmission using QADM with phase randomization |
Apr. 21, 1998 |
| 5710813 |
Digital voice recording/reproducing apparatus |
Jan. 20, 1998 |
| 5621800 |
Integrated circuit that performs multiple communication tasks |
Apr. 15, 1997 |
| 5617476 |
Audio scrambling system for scrambling and descrambling audio signals |
Apr. 1, 1997 |
| 5541997 |
Method and apparatus for detecting correctly decrypted communications |
Jul. 30, 1996 |
| 5528693 |
Method and apparatus for voice encryption in a communications system |
Jun. 18, 1996 |
| 5450490 |
Apparatus and methods for including codes in audio signals and decoding |
Sep. 12, 1995 |
| 5400404 |
Modulation/demodulation circuit and communication system utilizing the same |
Mar. 21, 1995 |
| 5365590 |
System for providing access to digitally encoded communications in a distributed switching network |
Nov. 15, 1994 |
| 5335279 |
Digital voice-band spectrum inversion apparatus |
Aug. 2, 1994 |
| 5278907 |
Analog scrambling with continuous synchronization |
Jan. 11, 1994 |
| 5197098 |
Secure conferencing system |
Mar. 23, 1993 |
| 5148478 |
System and method for communications security protection |
Sep. 15, 1992 |
| 5148482 |
Layered session data unit frame |
Sep. 15, 1992 |
| 5091941 |
Secure voice data transmission system |
Feb. 25, 1992 |
| 5065430 |
Voice band splitting scrambler |
Nov. 12, 1991 |
| 4981371 |
Integrated I/O interface for communication terminal |
Jan. 1, 1991 |
| 4964165 |
Method for the fast synchronization of vocoders coupled to one another by enciphering |
Oct. 16, 1990 |
| 4959863 |
Secret speech equipment |
Sep. 25, 1990 |
| 4937867 |
Variable time inversion algorithm controlled system for multi-level speech security |
Jun. 26, 1990 |
| 4903298 |
System for providing encryption and decryption of voice and data transmissions to and from an aircraft |
Feb. 20, 1990 |
| 4888799 |
Scrambling of signals by inversion |
Dec. 19, 1989 |
| 4873721 |
Device for starting charging in a pay phone |
Oct. 10, 1989 |
| 4852166 |
Analogue scrambling system with dynamic band permutation |
Jul. 25, 1989 |
| 4827507 |
Duplex analog scrambler |
May. 2, 1989 |
| 4799257 |
Wireless transmission system for PM modulation signal |
Jan. 17, 1989 |
| 4790009 |
Scrambler system |
Dec. 6, 1988 |
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