ZA705001B - Signal coding and decoding system - Google Patents

Signal coding and decoding system

Info

Publication number
ZA705001B
ZA705001B ZA705001A ZA705001A ZA705001B ZA 705001 B ZA705001 B ZA 705001B ZA 705001 A ZA705001 A ZA 705001A ZA 705001 A ZA705001 A ZA 705001A ZA 705001 B ZA705001 B ZA 705001B
Authority
ZA
South Africa
Prior art keywords
decoding system
signal coding
coding
signal
decoding
Prior art date
Application number
ZA705001A
Other languages
English (en)
Inventor
J Mcdonald
Original Assignee
Motorola 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 Motorola Inc filed Critical Motorola Inc
Publication of ZA705001B publication Critical patent/ZA705001B/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/38—Encryption being effected by mechanical apparatus, e.g. rotating cams, switches, keytape punchers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/65—Purpose and implementation aspects
    • H03M13/6502—Reduction of hardware complexity or efficient processing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Theoretical Computer Science (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Dc Digital Transmission (AREA)
ZA705001A 1969-08-13 1970-07-21 Signal coding and decoding system ZA705001B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US84985469A 1969-08-13 1969-08-13

Publications (1)

Publication Number Publication Date
ZA705001B true ZA705001B (en) 1971-04-28

Family

ID=25306680

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA705001A ZA705001B (en) 1969-08-13 1970-07-21 Signal coding and decoding system

Country Status (7)

Country Link
US (1) US3688193A (de)
JP (1) JPS5013042B1 (de)
KR (1) KR780000584B1 (de)
CA (1) CA922378A (de)
DE (1) DE2040339C3 (de)
IL (1) IL34989A (de)
ZA (1) ZA705001B (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4179586A (en) * 1972-08-02 1979-12-18 The United States Of America As Represented By The Secretary Of The Army System of encoded speech transmission and reception
US4068094A (en) * 1973-02-13 1978-01-10 Gretag Aktiengesellschaft Method and apparatus for the scrambled transmission of spoken information via a telephony channel
US4393276A (en) * 1981-03-19 1983-07-12 Bell Telephone Laboratories, Incorporated Fourier masking analog signal secure communication system
JPS60104708A (ja) * 1983-11-11 1985-06-10 Toohatsu Kk 分離給油２サイクルエンジン
US4638357A (en) * 1984-01-20 1987-01-20 Home Box Office, Inc. Audio scrambler
US4815130A (en) * 1986-10-03 1989-03-21 Communications Satellite Corporation Stream cipher system with feedback
US4827507A (en) * 1987-06-19 1989-05-02 Motorola, Inc. Duplex analog scrambler
US4984219A (en) * 1989-12-26 1991-01-08 Motorola, Inc. Method and apparatus for decoding of frequency inversion based scramblers

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3328526A (en) * 1963-12-20 1967-06-27 Bell Telephone Labor Inc Speech privacy system
NL126876C (de) * 1964-07-31

Also Published As

Publication number Publication date
US3688193A (en) 1972-08-29
DE2040339A1 (de) 1971-02-25
CA922378A (en) 1973-03-06
IL34989A (en) 1974-01-14
KR780000584B1 (en) 1978-11-18
IL34989A0 (en) 1971-02-25
DE2040339B2 (de) 1973-06-28
DE2040339C3 (de) 1980-01-31
JPS5013042B1 (de) 1975-05-16

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