JPS5721171A - Video information coding method - Google Patents

Video information coding method

Info

Publication number
JPS5721171A
JPS5721171A JP9655180A JP9655180A JPS5721171A JP S5721171 A JPS5721171 A JP S5721171A JP 9655180 A JP9655180 A JP 9655180A JP 9655180 A JP9655180 A JP 9655180A JP S5721171 A JPS5721171 A JP S5721171A
Authority
JP
Japan
Prior art keywords
data
picture
line
coding
video element
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
JP9655180A
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 JP9655180A priority Critical patent/JPS5721171A/en
Publication of JPS5721171A publication Critical patent/JPS5721171A/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
    • H04N1/411—Bandwidth or redundancy reduction for the transmission or storage or reproduction of two-tone pictures, e.g. black and white pictures
    • H04N1/413—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information
    • H04N1/417—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information using predictive or differential encoding

Abstract

PURPOSE:To reproduce picture with fidelity to an original picture, by coding an intermediate tone picture such as a seal printed with seal ink and a picture having rapid contrast change such as manual document optimizingly, through the coding of video information in combination with primary dimensional data compression data and the secondary dimensional data compression data. CONSTITUTION:An original picture is scanned into video element unit at a scanner 1, sampled and read in, separated into an even and odd number line with a switch SW1 through quantization in multiple at an A/D converter 2 and stored temporarily in line memories 3, 4. The even or odd number of data of each line toward the main scanning direction stored in the memories 3, 4 are coded with the primary dimensional data compression at an operator 5, compressors 6, 8 and a buffer memory 7, and each data of odd or even number is executed for coding through the secondary dimensional compression in response to the error between the actual value and the forecast of noticed video element for the average of data of each adjacent video element at the lines before and after the line, and it is transmitted to the reception side from a MODEM10.
JP9655180A 1980-07-15 1980-07-15 Video information coding method Pending JPS5721171A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9655180A JPS5721171A (en) 1980-07-15 1980-07-15 Video information coding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9655180A JPS5721171A (en) 1980-07-15 1980-07-15 Video information coding method

Publications (1)

Publication Number Publication Date
JPS5721171A true JPS5721171A (en) 1982-02-03

Family

ID=14168209

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9655180A Pending JPS5721171A (en) 1980-07-15 1980-07-15 Video information coding method

Country Status (1)

Country Link
JP (1) JPS5721171A (en)

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