JPS56125133A - Scramble system - Google Patents

Scramble system

Info

Publication number
JPS56125133A
JPS56125133A JP2834280A JP2834280A JPS56125133A JP S56125133 A JPS56125133 A JP S56125133A JP 2834280 A JP2834280 A JP 2834280A JP 2834280 A JP2834280 A JP 2834280A JP S56125133 A JPS56125133 A JP S56125133A
Authority
JP
Japan
Prior art keywords
gate
fed
signal
pulse train
virtual random
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.)
Pending
Application number
JP2834280A
Other languages
Japanese (ja)
Inventor
Yoji Fukinuki
Kazuhiro Hiraide
Choji Ogami
Koji Nishizaki
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.)
Fujitsu Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Nippon Electric Co Ltd
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 Fujitsu Ltd, NEC Corp, Nippon Telegraph and Telephone Corp, Nippon Electric Co Ltd filed Critical Fujitsu Ltd
Priority to JP2834280A priority Critical patent/JPS56125133A/en
Publication of JPS56125133A publication Critical patent/JPS56125133A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
    • H04L25/03866—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties using scrambling

Abstract

PURPOSE:To enable to surely detect the produced location of special signal at the reception side, by the transmission with the code of different code system in which the special signal such as frame synchronism signal and data signal can independently be identified. CONSTITUTION:A shift register 12 and an exclusive logical sum gate 11 constitute a virtual random pattern generating circuit, and the virtual random pattern train is fed to an exclusive OR gate 14 via an inhibition gate 13 when the output signal (a) of the timing generating circuit 16 is ''0'', that is, other than the produced location of the frame synchronizing signal, and the input pulse train S7 from the input pulse train generating circuit 15 is scrambled with the virtual random pulse train and fed to the code conversion circuit 17. If (a) is ''1'', the inhibition gate 13 is off, and the virtual random pulse train is not fed to the exclusive OR gate 14 but fed to the circuit 17.
JP2834280A 1980-03-06 1980-03-06 Scramble system Pending JPS56125133A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2834280A JPS56125133A (en) 1980-03-06 1980-03-06 Scramble system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2834280A JPS56125133A (en) 1980-03-06 1980-03-06 Scramble system

Publications (1)

Publication Number Publication Date
JPS56125133A true JPS56125133A (en) 1981-10-01

Family

ID=12245916

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2834280A Pending JPS56125133A (en) 1980-03-06 1980-03-06 Scramble system

Country Status (1)

Country Link
JP (1) JPS56125133A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4843209A (en) * 1971-10-01 1973-06-22
JPS5366318A (en) * 1976-11-26 1978-06-13 Fujitsu Ltd Scramble system
JPS5412207A (en) * 1977-06-17 1979-01-29 Nec Corp Signal transmission system
JPS5412203A (en) * 1976-11-26 1979-01-29 Paradyne Corp Digital modem

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4843209A (en) * 1971-10-01 1973-06-22
JPS5366318A (en) * 1976-11-26 1978-06-13 Fujitsu Ltd Scramble system
JPS5412203A (en) * 1976-11-26 1979-01-29 Paradyne Corp Digital modem
JPS5412207A (en) * 1977-06-17 1979-01-29 Nec Corp Signal transmission system

Similar Documents

Publication Publication Date Title
JPS53144622A (en) Video signal processing system
JPS5399718A (en) Signal state detector circuit
JPS547817A (en) Fascimile unit
JPS56125133A (en) Scramble system
JPS5387123A (en) Information processing unit
JPS55149553A (en) Specific pulse inserting and removing circuit in data transmission system
JPS5231629A (en) Data communiction system
JPS5528620A (en) Synchronizing system of communication line
JPS5416945A (en) Signal transmission system
JPS5211735A (en) Signal transmission system
JPS53118948A (en) Synchronizing unit
JPS5441014A (en) Clock signal generator circuit
JPS53107209A (en) Various-signal transmission system of time-division exchange
JPS537165A (en) Synchronism detecting circuit of phase control circuit
JPS56156045A (en) Scrambling system
JPS5311410A (en) Process for constructing railway circuit
JPS51132028A (en) Clearing system of memory device
JPS53142157A (en) Noise protection circuit
JPS5370711A (en) Picture image transmitting system
JPS5421120A (en) Coordinate input unit
JPS51130134A (en) Asynchronous data reception control system
JPS54109733A (en) Synchronous control system for interface device
JPS5764842A (en) Data transfer system
JPS53132227A (en) Output unit for video data
JPS5420612A (en) Transmssion system for coded signal