JPS57130214A - Digital modulation and demodulation system - Google Patents

Digital modulation and demodulation system

Info

Publication number
JPS57130214A
JPS57130214A JP1480981A JP1480981A JPS57130214A JP S57130214 A JPS57130214 A JP S57130214A JP 1480981 A JP1480981 A JP 1480981A JP 1480981 A JP1480981 A JP 1480981A JP S57130214 A JPS57130214 A JP S57130214A
Authority
JP
Japan
Prior art keywords
bits
bit
information
synchronizing
pattern
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
JP1480981A
Other languages
Japanese (ja)
Inventor
Katsumi Murai
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 JP1480981A priority Critical patent/JPS57130214A/en
Publication of JPS57130214A publication Critical patent/JPS57130214A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Dc Digital Transmission (AREA)

Abstract

PURPOSE:To reduce increases in minimum magnetization inverting interval and in detection window width, by performing synchronization by adding one bit to orginal information data bits. CONSTITUTION:Five digital information words and one 32-bit word consisting of 26 bits for a synchronizing-bit pattern and 6 information bits are regarded as one group and data 1-7 consisting of 192 bits in total succeed one after another. Further, five out of six information bits 7 relate to the digital information words 2-6. A bit 0 is given to 31 bits, synchronizing-bit pattern bits and 5 information bits, to be arranged at 14, and a synchronizing pattern 8 is converted 1 without being inverted.
JP1480981A 1981-02-02 1981-02-02 Digital modulation and demodulation system Pending JPS57130214A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1480981A JPS57130214A (en) 1981-02-02 1981-02-02 Digital modulation and demodulation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1480981A JPS57130214A (en) 1981-02-02 1981-02-02 Digital modulation and demodulation system

Publications (1)

Publication Number Publication Date
JPS57130214A true JPS57130214A (en) 1982-08-12

Family

ID=11871364

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1480981A Pending JPS57130214A (en) 1981-02-02 1981-02-02 Digital modulation and demodulation system

Country Status (1)

Country Link
JP (1) JPS57130214A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0205305A2 (en) * 1985-06-03 1986-12-17 Canon Kabushiki Kaisha Data transmission and detection method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0205305A2 (en) * 1985-06-03 1986-12-17 Canon Kabushiki Kaisha Data transmission and detection method
US4847703A (en) * 1985-06-03 1989-07-11 Canon Kabushiki Kaisha Data transmission and detection system

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