JPS624021B2 - - Google Patents

Info

Publication number
JPS624021B2
JPS624021B2 JP55055509A JP5550980A JPS624021B2 JP S624021 B2 JPS624021 B2 JP S624021B2 JP 55055509 A JP55055509 A JP 55055509A JP 5550980 A JP5550980 A JP 5550980A JP S624021 B2 JPS624021 B2 JP S624021B2
Authority
JP
Japan
Prior art keywords
circuit
output
spectrum
signal
obtaining
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
JP55055509A
Other languages
English (en)
Japanese (ja)
Other versions
JPS56153862A (en
Inventor
Keiichi Sakurai
Keiichiro Koga
Takuo Muratani
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.)
KDDI Corp
Original Assignee
Kokusai Denshin Denwa KK
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 Kokusai Denshin Denwa KK filed Critical Kokusai Denshin Denwa KK
Priority to JP5550980A priority Critical patent/JPS56153862A/ja
Publication of JPS56153862A publication Critical patent/JPS56153862A/ja
Publication of JPS624021B2 publication Critical patent/JPS624021B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/04—Secret communication by frequency scrambling, i.e. by transposing or inverting parts of the frequency band or by inverting the whole band

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
JP5550980A 1980-04-28 1980-04-28 Privacy telephone system Granted JPS56153862A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5550980A JPS56153862A (en) 1980-04-28 1980-04-28 Privacy telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5550980A JPS56153862A (en) 1980-04-28 1980-04-28 Privacy telephone system

Publications (2)

Publication Number Publication Date
JPS56153862A JPS56153862A (en) 1981-11-28
JPS624021B2 true JPS624021B2 (enrdf_load_stackoverflow) 1987-01-28

Family

ID=13000639

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5550980A Granted JPS56153862A (en) 1980-04-28 1980-04-28 Privacy telephone system

Country Status (1)

Country Link
JP (1) JPS56153862A (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60140942A (ja) * 1983-12-27 1985-07-25 Sony Corp 信号伝送装置
JPS60140933A (ja) * 1983-12-27 1985-07-25 Sony Corp 帯域圧縮・伸長装置
JPS6216639A (ja) * 1985-07-16 1987-01-24 Kokusai Denshin Denwa Co Ltd <Kdd> 秘話音声信号送出装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE TRANSACTION ON ACOSTICS SPEECH AND SIGNAL PROCESSING=1979M4 *

Also Published As

Publication number Publication date
JPS56153862A (en) 1981-11-28

Similar Documents

Publication Publication Date Title
Sridharan et al. Fast Fourier transform based speech encryption system
KR910004405B1 (ko) 비밀 통화장치
Al Saad et al. A speech encryption based on chaotic maps
US4443660A (en) System and method for encrypting a voice signal
JPS63124638A (ja) アナログスクランブル装置
Senk et al. A new speech scrambling concept based on Hadamard matrices
US7212633B2 (en) Expansion key generating device, encryption device and encryption system
JPS59107658A (ja) 秘話送受信装置
JPS624021B2 (enrdf_load_stackoverflow)
JPH02192336A (ja) 情報処理方法及びその装置
US4058677A (en) Sound scrambling equipment
Lin et al. Blind source separation-based encryption of images and speeches
EP2178235B1 (en) Encryption of information signals
Alghamdi Design and implementation of a voice encryption system using fractional-order chaotic maps
US4750205A (en) Frequency or time domain speech scrambling technique and system which does not require any frame synchronization
JPS63314933A (ja) 秘話装置
JPH10153954A (ja) 暗号装置
JPH04304727A (ja) データ暗号化装置、データ復号化装置、及びデータ暗号化復号化装置
JPH0316334A (ja) 秘話装置
KR100466546B1 (ko) 주파수 대역분할을 이용한 키 송수신 방법
Pichler A-4040 Linz, Austria
JPS62147827A (ja) 秘話通信装置
RU2127024C1 (ru) Блок шифрования
Power Psychology of language
JPH10153955A (ja) 暗号装置