ES8604378A1 - 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
ES8604378A1
ES8604378A1 ES535443A ES535443A ES8604378A1 ES 8604378 A1 ES8604378 A1 ES 8604378A1 ES 535443 A ES535443 A ES 535443A ES 535443 A ES535443 A ES 535443A ES 8604378 A1 ES8604378 A1 ES 8604378A1
Authority
ES
Spain
Prior art keywords
signal
excitation
vocal tract
response
methods
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.)
Expired
Application number
ES535443A
Other languages
English (en)
Other versions
ES535443A0 (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 Corp
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

Abstract

METODO Y APARATO PARA LA TRANSMISION DE SEÑALES DE FRECUENCIA VOCAL. EL METODO COMPRENDE LAS SIGUIENTES OPERACIONES: PRIMERA, SE ALIMENTA A UN CANAL DE TRANSMISION UNA PRIMERA SEÑAL QUE INCLUYE INFORMACION DERIVADA DE LA RESPUESTA AL TRACTO VOCAL DE UNA SEÑAL DE FRECUENCIA VOCAL; SEGUNDA, SE ALIMENTA AL CANAL DE TRANSMISION UNA SEGUNDA SEÑAL QUE INCLUYE INFORMACION DERIVADA DEL COMPONENTE DE EXCITACION EN LA SEGUNDA SEÑAL EN FORMA CONTINUA; Y POR ULTIMO, SE MULTIPLEXA EN DIVISION DE FRECUENCIA LA PRIMERA Y SEGUNDA SEÑALES Y SE FILTRA LA SEGUNDA SEÑAL DE ACUERDO CON UNA CARACTERISTICA DE FILTRO QUE ESTA EN FUNCION DE LA INFORMACION DE RESPUESTA AL TRACTO VOCAL.
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 ES535443A0 (es) 1986-02-01
ES8604378A1 true 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 (11)

* 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
US6266418B1 (en) 1998-10-28 2001-07-24 L3-Communications Corporation Encryption and authentication methods and apparatus for securing telephone communications
KR100927842B1 (ko) * 2001-04-18 2009-11-23 아이피지 일렉트로닉스 503 리미티드 오디오 신호를 인코딩하고 디코딩하는 방법, 오디오 코더, 오디오 플레이어, 그러한 오디오 코더와 그러한 오디오 플레이어를 포함하는 오디오 시스템 및 오디오 스트림을 저장하기 위한 저장 매체
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
US8290170B2 (en) * 2006-05-01 2012-10-16 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
US4486899A (en) * 1981-03-17 1984-12-04 Nippon Electric Co., Ltd. System for extraction of pole 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
EP0136062A2 (en) 1985-04-03
ES535443A0 (es) 1986-02-01
JPS6072343A (ja) 1985-04-24
CA1225758A (en) 1987-08-18
JPH0449818B2 (es) 1992-08-12
DE3480893D1 (de) 1990-02-01
EP0136062B1 (en) 1989-12-27
US4612414A (en) 1986-09-16
EP0136062A3 (en) 1986-04-02

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