JPS57210776A - Compressing device for pattern data - Google Patents

Compressing device for pattern data

Info

Publication number
JPS57210776A
JPS57210776A JP56095267A JP9526781A JPS57210776A JP S57210776 A JPS57210776 A JP S57210776A JP 56095267 A JP56095267 A JP 56095267A JP 9526781 A JP9526781 A JP 9526781A JP S57210776 A JPS57210776 A JP S57210776A
Authority
JP
Japan
Prior art keywords
share
data
scanning
bit series
logic
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.)
Granted
Application number
JP56095267A
Other languages
Japanese (ja)
Other versions
JPH0115187B2 (en
Inventor
Hidefumi Masuzaki
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56095267A priority Critical patent/JPS57210776A/en
Publication of JPS57210776A publication Critical patent/JPS57210776A/en
Publication of JPH0115187B2 publication Critical patent/JPH0115187B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/41—Bandwidth or redundancy reduction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)

Abstract

PURPOSE:To keep an input speed constant and to attain high speed data compression, by providing a buffer for 2 scanning line's share and an overrun detection logic and eliminating a bit series for one scanning's share at the generation of overrun. CONSTITUTION:Buffers 1 and 2 for each one scanning line's share are provided for a quantized bit series input 8. A data compression logic 3 compresses data for one scanning's share from the buffers 1 and 2 and writes the data to a memory 4. If the logic 3 can not compress the data for one scanning's share within an input time of quantized bit for one scanning's share, an overrun detection logic 6 detects it and stops the changeover between the buffers 1 and 2 so that the bit series for one scanning's share can be eliminated. A data recovery logic 7 expands this compressed data for the missing data bit series after the end of completion. Thus, the input speed of the quantized bit series can be kept constant and the speed-up of the system can be made.
JP56095267A 1981-06-22 1981-06-22 Compressing device for pattern data Granted JPS57210776A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56095267A JPS57210776A (en) 1981-06-22 1981-06-22 Compressing device for pattern data

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56095267A JPS57210776A (en) 1981-06-22 1981-06-22 Compressing device for pattern data

Publications (2)

Publication Number Publication Date
JPS57210776A true JPS57210776A (en) 1982-12-24
JPH0115187B2 JPH0115187B2 (en) 1989-03-16

Family

ID=14132984

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56095267A Granted JPS57210776A (en) 1981-06-22 1981-06-22 Compressing device for pattern data

Country Status (1)

Country Link
JP (1) JPS57210776A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01108682A (en) * 1987-10-21 1989-04-25 Hitachi Ltd Pattern inspecting device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01108682A (en) * 1987-10-21 1989-04-25 Hitachi Ltd Pattern inspecting device

Also Published As

Publication number Publication date
JPH0115187B2 (en) 1989-03-16

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