JPS5511688A - Code error detection/correction device - Google Patents

Code error detection/correction device

Info

Publication number
JPS5511688A
JPS5511688A JP8558578A JP8558578A JPS5511688A JP S5511688 A JPS5511688 A JP S5511688A JP 8558578 A JP8558578 A JP 8558578A JP 8558578 A JP8558578 A JP 8558578A JP S5511688 A JPS5511688 A JP S5511688A
Authority
JP
Japan
Prior art keywords
code
output
error
gate
clocks
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
JP8558578A
Other languages
Japanese (ja)
Inventor
Norio Aoki
Kunihiko Mototani
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP8558578A priority Critical patent/JPS5511688A/en
Publication of JPS5511688A publication Critical patent/JPS5511688A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/24—Testing correct operation
    • H04L1/245—Testing correct operation by using the properties of transmission codes
    • H04L1/247—Testing correct operation by using the properties of transmission codes three-level transmission codes, e.g. ternary

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Dc Digital Transmission (AREA)

Abstract

PURPOSE:To secure the correction for the code error featuring the highest occurrence frequency by memorizing the data equivalent to the adjacent two clocks through the bipolar PCM code decoder circuit and then opening the gate by these two output ot generate the detection signals when the code error occurs. CONSTITUTION:The level comparison is carried out via comparator 1 and 2 between reference voltage VR1/VR2 and PCM reception signal S in order to obtain the + and - code output. These code output are then applied to n-nit shift register 3 consisting of n-units of D-FF to which timing extracting clock pulse (c) is applied. For the bipolar PCM code, the same code of 1 or - never continues by more than two clocks. Thus, in case the output of NAND gate 4 to which every adjacent two bits are supplied is O, some error exists to produce error detection information (e). When this signal is delivered from gate 4 or 4', corresponding FF5 and 5' are cleared forcedly to secure the output of O. Thus, the error can be corrected.
JP8558578A 1978-07-12 1978-07-12 Code error detection/correction device Pending JPS5511688A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8558578A JPS5511688A (en) 1978-07-12 1978-07-12 Code error detection/correction device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8558578A JPS5511688A (en) 1978-07-12 1978-07-12 Code error detection/correction device

Publications (1)

Publication Number Publication Date
JPS5511688A true JPS5511688A (en) 1980-01-26

Family

ID=13862881

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8558578A Pending JPS5511688A (en) 1978-07-12 1978-07-12 Code error detection/correction device

Country Status (1)

Country Link
JP (1) JPS5511688A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57150248A (en) * 1981-03-12 1982-09-17 Nec Corp Bipolar code error detecting circuit
JPH01254248A (en) * 1988-04-01 1989-10-11 Mitsubishi Kasei Corp Complex separation agent and manufacture thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57150248A (en) * 1981-03-12 1982-09-17 Nec Corp Bipolar code error detecting circuit
JPH0140539B2 (en) * 1981-03-12 1989-08-29 Nippon Electric Co
JPH01254248A (en) * 1988-04-01 1989-10-11 Mitsubishi Kasei Corp Complex separation agent and manufacture thereof

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