JPS5728472A - Picture information coding method - Google Patents

Picture information coding method

Info

Publication number
JPS5728472A
JPS5728472A JP10325680A JP10325680A JPS5728472A JP S5728472 A JPS5728472 A JP S5728472A JP 10325680 A JP10325680 A JP 10325680A JP 10325680 A JP10325680 A JP 10325680A JP S5728472 A JPS5728472 A JP S5728472A
Authority
JP
Japan
Prior art keywords
coding
picture
picture information
coder
tetrastate
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
JP10325680A
Other languages
Japanese (ja)
Inventor
Toshiaki Yamada
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP10325680A priority Critical patent/JPS5728472A/en
Publication of JPS5728472A publication Critical patent/JPS5728472A/en
Pending 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 perform the coding of picture information quantitized in tetracoded state with good data compression rate, by subjecting to approximate binary processing and run-length coding, and further coding over the details of picture. CONSTITUTION:A video information input section consisting of a scanner 1 scanning an original picture sequentially every picture element and reading in it, quantitizer 2 quantitizing the read-in picture information into tetrastate, and line memory 3 temporarily storing the picture information for one scanning line's share in tetrastate quantization, is provided. This signal passes through a run length coder 5 which executes the 2nd process according to the converting signal and a code converter 4, and also through a changing point detector 6 and a changing point coder 7, a level detection/counter section 8 and an intermediate tone coder 9, and these outputs are applied to an output buffer memory 10. Thus, approximate coding and detailed coding are made in parallel.
JP10325680A 1980-07-28 1980-07-28 Picture information coding method Pending JPS5728472A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10325680A JPS5728472A (en) 1980-07-28 1980-07-28 Picture information coding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10325680A JPS5728472A (en) 1980-07-28 1980-07-28 Picture information coding method

Publications (1)

Publication Number Publication Date
JPS5728472A true JPS5728472A (en) 1982-02-16

Family

ID=14349356

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10325680A Pending JPS5728472A (en) 1980-07-28 1980-07-28 Picture information coding method

Country Status (1)

Country Link
JP (1) JPS5728472A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05183755A (en) * 1991-12-27 1993-07-23 Victor Co Of Japan Ltd Data compressing device and data expanding device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5561171A (en) * 1978-10-31 1980-05-08 Nippon Telegr & Teleph Corp <Ntt> Tone code system for facsimile signal

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5561171A (en) * 1978-10-31 1980-05-08 Nippon Telegr & Teleph Corp <Ntt> Tone code system for facsimile signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05183755A (en) * 1991-12-27 1993-07-23 Victor Co Of Japan Ltd Data compressing device and data expanding device

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