ES535443A0 - Metodo y aparato para la transmision de senales de frecuencia vocal - Google Patents

Metodo y aparato para la transmision de senales de frecuencia vocal

Info

Publication number
ES535443A0
ES535443A0 ES535443A ES535443A ES535443A0 ES 535443 A0 ES535443 A0 ES 535443A0 ES 535443 A ES535443 A ES 535443A ES 535443 A ES535443 A ES 535443A ES 535443 A0 ES535443 A0 ES 535443A0
Authority
ES
Spain
Prior art keywords
transmission
frequency signals
vocal frequency
vocal
signals
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
ES535443A
Other languages
English (en)
Other versions
ES8604378A1 (es
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Inc
Original Assignee
American Telephone and Telegraph Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by American Telephone and Telegraph Co Inc filed Critical American Telephone and Telegraph Co Inc
Publication of ES535443A0 publication Critical patent/ES535443A0/es
Publication of ES8604378A1 publication Critical patent/ES8604378A1/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Time-Division Multiplex Systems (AREA)
ES535443A 1983-08-31 1984-08-27 Metodo y aparato para la transmision de senales de frecuencia vocal Expired ES8604378A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/527,962 US4612414A (en) 1983-08-31 1983-08-31 Secure voice transmission

Publications (2)

Publication Number Publication Date
ES535443A0 true ES535443A0 (es) 1986-02-01
ES8604378A1 ES8604378A1 (es) 1986-02-01

Family

ID=24103694

Family Applications (1)

Application Number Title Priority Date Filing Date
ES535443A Expired ES8604378A1 (es) 1983-08-31 1984-08-27 Metodo y aparato para la transmision de senales de frecuencia vocal

Country Status (6)

Country Link
US (1) US4612414A (es)
EP (1) EP0136062B1 (es)
JP (1) JPS6072343A (es)
CA (1) CA1225758A (es)
DE (1) DE3480893D1 (es)
ES (1) ES8604378A1 (es)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6345933A (ja) * 1986-04-15 1988-02-26 Nec Corp 秘話装置
US4893339A (en) * 1986-09-03 1990-01-09 Motorola, Inc. Secure communication system
US5150401A (en) * 1990-12-04 1992-09-22 Chips International, Inc. Retrofittable encryption/decryption apparatus using modified frequency modulation
US5216714A (en) * 1991-12-13 1993-06-01 3Com Corporation Method and apparatus for controlling the spectral content of a data stream
JP2591430B2 (ja) * 1993-06-30 1997-03-19 日本電気株式会社 ベクトル量子化装置
US5781882A (en) * 1995-09-14 1998-07-14 Motorola, Inc. Very low bit rate voice messaging system using asymmetric voice compression processing
US5701294A (en) * 1995-10-02 1997-12-23 Telefonaktiebolaget Lm Ericsson System and method for flexible coding, modulation, and time slot allocation in a radio telecommunications network
RU2112319C1 (ru) * 1997-10-29 1998-05-27 Открытое акционерное общество Холдинговая компания "Электрозавод" Лаборатория II Способ защиты информации, принимаемой по проводным каналам связи и система для его осуществления
EP1127421A4 (en) 1998-10-28 2004-12-15 L 3 Comm Corp METHOD FOR ENCRYPTION AND AUTHENTICATION AND DEVICE FOR SECURING TELEPHONE CALLS
DE60213394T2 (de) * 2001-04-18 2007-08-23 Koninklijke Philips Electronics N.V. Audiokodierung mit partieller enkryption
RU2216108C2 (ru) * 2001-07-13 2003-11-10 Попов Никита Викторович Способ защиты информации от несанкционированного доступа с использованием шумоподобных сигналов
DE10138650A1 (de) * 2001-08-07 2003-02-27 Fraunhofer Ges Forschung Verfahren und Vorrichtung zum Verschlüsseln eines diskreten Signals sowie Verfahren und Vorrichtung zur Entschlüsselung
WO2007130026A1 (en) * 2006-05-01 2007-11-15 Nippon Telegraph And Telephone Corporation Method and apparatus for speech dereverberation based on probabilistic models of source and room acoustics

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2071282A5 (es) * 1969-12-23 1971-09-17 Cit Alcatel
US3786188A (en) * 1972-12-07 1974-01-15 Bell Telephone Labor Inc Synthesis of pure speech from a reverberant signal
CA1123955A (en) * 1978-03-30 1982-05-18 Tetsu Taguchi Speech analysis and synthesis apparatus
US4330689A (en) * 1980-01-28 1982-05-18 The United States Of America As Represented By The Secretary Of The Navy Multirate digital voice communication processor
JPS5913758B2 (ja) * 1980-02-22 1984-03-31 株式会社日立製作所 音声合成方法
US4401855A (en) * 1980-11-28 1983-08-30 The Regents Of The University Of California Apparatus for the linear predictive coding of human speech
CA1164569A (en) * 1981-03-17 1984-03-27 Katsunobu Fushikida System for extraction of pole/zero parameter values
GB2133255B (en) * 1982-12-23 1986-04-03 Standard Telephones Cables Ltd Secure speech transmission system

Also Published As

Publication number Publication date
JPS6072343A (ja) 1985-04-24
EP0136062A3 (en) 1986-04-02
DE3480893D1 (de) 1990-02-01
ES8604378A1 (es) 1986-02-01
EP0136062A2 (en) 1985-04-03
EP0136062B1 (en) 1989-12-27
JPH0449818B2 (es) 1992-08-12
CA1225758A (en) 1987-08-18
US4612414A (en) 1986-09-16

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