JPS5625848A - Frame synchronizing system - Google Patents

Frame synchronizing system

Info

Publication number
JPS5625848A
JPS5625848A JP10239479A JP10239479A JPS5625848A JP S5625848 A JPS5625848 A JP S5625848A JP 10239479 A JP10239479 A JP 10239479A JP 10239479 A JP10239479 A JP 10239479A JP S5625848 A JPS5625848 A JP S5625848A
Authority
JP
Japan
Prior art keywords
frame
frame synchronizing
pattern
signal
auxiliary
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
JP10239479A
Other languages
Japanese (ja)
Inventor
Hisanobu Fujimoto
Takeo Fukushima
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
Original Assignee
Fujitsu 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 filed Critical Fujitsu Ltd
Priority to JP10239479A priority Critical patent/JPS5625848A/en
Publication of JPS5625848A publication Critical patent/JPS5625848A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/0079—Receiver details
    • H04L7/0083—Receiver details taking measures against momentary loss of synchronisation, e.g. inhibiting the synchronisation, using idle words or using redundant clocks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

PURPOSE:To make close the frame synchronizing pulse, by transmitting the frame synchronizing auxiliary pattern pulse signal in 7 bits when the specific channel is at noncommunication state, to constitute the synchronizing information of one-frame 8 bits. CONSTITUTION:When the channel CH5 is at noncommunication state, ground signal is fed to the transmission signal line 2. The ground signal is delivered to the auxiliary frame pulse generator 10 from the transmission end corresponding to the channel CH5, and thus, the auxiliary frame pulse generator 10 produces the specified pattern signal in 7 bits. At the reception side, besides the frame synchronizing bit, the pattern state of the frame synchronizing auxiliary pattern pulse signal is detected with the frame synchronizing circuit 17. If the frame synchronizing circuit 17 detects the error in the frame synchronizing pattern and regards it as the out of synchronizm, the synchronism is again taken.
JP10239479A 1979-08-10 1979-08-10 Frame synchronizing system Pending JPS5625848A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10239479A JPS5625848A (en) 1979-08-10 1979-08-10 Frame synchronizing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10239479A JPS5625848A (en) 1979-08-10 1979-08-10 Frame synchronizing system

Publications (1)

Publication Number Publication Date
JPS5625848A true JPS5625848A (en) 1981-03-12

Family

ID=14326223

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10239479A Pending JPS5625848A (en) 1979-08-10 1979-08-10 Frame synchronizing system

Country Status (1)

Country Link
JP (1) JPS5625848A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63314037A (en) * 1987-06-17 1988-12-22 Hitachi Ltd System for establishing resynchronization in compressing and transmitting voice

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63314037A (en) * 1987-06-17 1988-12-22 Hitachi Ltd System for establishing resynchronization in compressing and transmitting voice

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