JPS5715568A - Video information coding method - Google Patents

Video information coding method

Info

Publication number
JPS5715568A
JPS5715568A JP9023080A JP9023080A JPS5715568A JP S5715568 A JPS5715568 A JP S5715568A JP 9023080 A JP9023080 A JP 9023080A JP 9023080 A JP9023080 A JP 9023080A JP S5715568 A JPS5715568 A JP S5715568A
Authority
JP
Japan
Prior art keywords
coding
picture
taking notice
compressor
intermediate tone
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
JP9023080A
Other languages
Japanese (ja)
Inventor
Yoshitoshi Yamauchi
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 JP9023080A priority Critical patent/JPS5715568A/en
Publication of JPS5715568A publication Critical patent/JPS5715568A/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)

Abstract

PURPOSE:To express an intermediate tone sufficiently, by coding roughly in taking notice of changing points of picture elements in white and black levels and coding in detail in taking notice of the change in the intermediate tone level. CONSTITUTION:A picture signal read in with a scanner 1 is applied to a buffer register 4 for one line's share via an A/D converter 2 and data compressor 3. In the compressor 3, a coding according to a rough picture state is made by taking notice of the changing point of the video elements in white and black levels. Next, a switch SW1 is selected to (b) side, and the content of the register 4 is applied to the compressor 3, where the detailed coding of the picture is made this time by taking notice the changing state of intermediate tone level only. A buffer circuit 5 combines coded signals in data compression serially and transmits it to a MODEM6.
JP9023080A 1980-07-02 1980-07-02 Video information coding method Pending JPS5715568A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9023080A JPS5715568A (en) 1980-07-02 1980-07-02 Video information coding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9023080A JPS5715568A (en) 1980-07-02 1980-07-02 Video information coding method

Publications (1)

Publication Number Publication Date
JPS5715568A true JPS5715568A (en) 1982-01-26

Family

ID=13992678

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9023080A Pending JPS5715568A (en) 1980-07-02 1980-07-02 Video information coding method

Country Status (1)

Country Link
JP (1) JPS5715568A (en)

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