JPS57107675A - Compression system for intermediate tone signal - Google Patents

Compression system for intermediate tone signal

Info

Publication number
JPS57107675A
JPS57107675A JP55182741A JP18274180A JPS57107675A JP S57107675 A JPS57107675 A JP S57107675A JP 55182741 A JP55182741 A JP 55182741A JP 18274180 A JP18274180 A JP 18274180A JP S57107675 A JPS57107675 A JP S57107675A
Authority
JP
Japan
Prior art keywords
video
data
share
code
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
JP55182741A
Other languages
Japanese (ja)
Inventor
Kyoji Koseki
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP55182741A priority Critical patent/JPS57107675A/en
Publication of JPS57107675A publication Critical patent/JPS57107675A/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
    • H04N1/415—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information in which the picture-elements are subdivided or grouped into fixed one-dimensional or two-dimensional blocks

Landscapes

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

Abstract

PURPOSE:To minimize the deterioration of video quality due to compression, by compressing the combination of codes for 2 video elements' share of an intermediate tone signal in which one video element is represented with one tone out of a plurality of tones into a fixed length code shorter than the code length for two video elements' share. CONSTITUTION:An intermediate tone video signal read-in from an original is written in a random access memory 3 with a read-in circuit 1. The data from the random access memory 3 is transmitted to a code conversion circuit 4 and a microcomputer 5. The data in 8-bit inputted to the code conversion circuit 4 is compressed into data in 7-bit under the control of the microcomputer 5, inputted to a shift register 7, and a data in 7-bit is transmitted to a BCH processing circuit from the shift register 7 as a transmission data SD. In a code conversion circuit 4, the combination of codes for two video elements' share of intermediate tone signals in which one video element is represented with one tone out of a plurality of tones, is compressed into a fixed code length shorter than the code length for two video elements' share.
JP55182741A 1980-12-25 1980-12-25 Compression system for intermediate tone signal Pending JPS57107675A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55182741A JPS57107675A (en) 1980-12-25 1980-12-25 Compression system for intermediate tone signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55182741A JPS57107675A (en) 1980-12-25 1980-12-25 Compression system for intermediate tone signal

Publications (1)

Publication Number Publication Date
JPS57107675A true JPS57107675A (en) 1982-07-05

Family

ID=16123617

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55182741A Pending JPS57107675A (en) 1980-12-25 1980-12-25 Compression system for intermediate tone signal

Country Status (1)

Country Link
JP (1) JPS57107675A (en)

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