JPS6485427A - 8/9 code conversion method - Google Patents

8/9 code conversion method

Info

Publication number
JPS6485427A
JPS6485427A JP24298787A JP24298787A JPS6485427A JP S6485427 A JPS6485427 A JP S6485427A JP 24298787 A JP24298787 A JP 24298787A JP 24298787 A JP24298787 A JP 24298787A JP S6485427 A JPS6485427 A JP S6485427A
Authority
JP
Japan
Prior art keywords
conversion
bit data
dsv
code conversion
polarity
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
JP24298787A
Other languages
Japanese (ja)
Inventor
Tetsushi Itoi
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.)
NEC Home Electronics Ltd
NEC Corp
Original Assignee
NEC Home Electronics Ltd
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 NEC Home Electronics Ltd, Nippon Electric Co Ltd filed Critical NEC Home Electronics Ltd
Priority to JP24298787A priority Critical patent/JPS6485427A/en
Priority to EP88116018A priority patent/EP0310041A3/en
Publication of JPS6485427A publication Critical patent/JPS6485427A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To facilitate PLA processing utilizing feature of a small sized ROM by preparing a couple of conversion tables divided depending on the polarity of DSV of 9-bit data after code conversion, selecting a proper conversion table in response to the polarity of a DSV integration value and applying code conversion so as to converge the DSV integration value to zero. CONSTITUTION:A 8/9 coder 11 converts 8-bit data into 9-bit data and in the principles of operation. In terms of the operation principle, a couple of conversion tables A, B divided depending whether the DSV(Digital Sum Variation) representing the DC balance of the 9-bit data after code conversion is positive or negative are prepared and a proper conversion table A or B is selected depending on the polarity of the DSV integration value updated at each conversion and code conversion is applied so that the DSV integration is converged to zero. Thus, two kinds of conversion tables are enough as to the 8-bit data and a proper 9-bit data is read by 256 addresses and the PLA processing utilizing the feature of the small sized ROM is facilitated.
JP24298787A 1987-09-28 1987-09-28 8/9 code conversion method Pending JPS6485427A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP24298787A JPS6485427A (en) 1987-09-28 1987-09-28 8/9 code conversion method
EP88116018A EP0310041A3 (en) 1987-09-28 1988-09-28 8-bit to 9-bit code conversion system and 8/9 converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24298787A JPS6485427A (en) 1987-09-28 1987-09-28 8/9 code conversion method

Publications (1)

Publication Number Publication Date
JPS6485427A true JPS6485427A (en) 1989-03-30

Family

ID=17097212

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24298787A Pending JPS6485427A (en) 1987-09-28 1987-09-28 8/9 code conversion method

Country Status (1)

Country Link
JP (1) JPS6485427A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009536469A (en) * 2006-01-12 2009-10-08 エヌエックスピー ビー ヴィ Coding method for serial data communication

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009536469A (en) * 2006-01-12 2009-10-08 エヌエックスピー ビー ヴィ Coding method for serial data communication
JP4780350B2 (en) * 2006-01-12 2011-09-28 エスティー‐エリクソン、ソシエテ、アノニム Coding method for serial data communication

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