JPS56116365A - Transmission method of video information - Google Patents

Transmission method of video information

Info

Publication number
JPS56116365A
JPS56116365A JP1857180A JP1857180A JPS56116365A JP S56116365 A JPS56116365 A JP S56116365A JP 1857180 A JP1857180 A JP 1857180A JP 1857180 A JP1857180 A JP 1857180A JP S56116365 A JPS56116365 A JP S56116365A
Authority
JP
Japan
Prior art keywords
digit
value
gray code
biquardric
lower digit
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
JP1857180A
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 JP1857180A priority Critical patent/JPS56116365A/en
Publication of JPS56116365A publication Critical patent/JPS56116365A/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 obtain a reproduced picture of high quality, by representing density information of each video element of a picture in 2-bit gray code, making run length coding for the lower digit of this gray code and coding the video information with a higher compression rate. CONSTITUTION:The original is scanned at a read-in scanning section 1 and the signal is converted into biquardric value digital signal of natural binary number in 2-bit at the biquardric quantization section 2. This digital signal is converted into biquardric signal of gray code at the gray code conversion section 3 to store the 4 level of 0-4 of gray code for one line's share at the lower digit LSB and the upper digit MSB line memories 4, 5. Further, every group of video element, the lower digit of gray code of density information is run-length-coded and transmitted from the output buffer 9, and the value immediately before and after the value of the lower digit is changed is transmitted. Further, at the reception side, the value of the lower digit of run length code is decoded, and the value of the upper rank digit immediately before and after the change in the lower rank digit is determined with the received upper rank digit and the value of the upper rank digit in other cases is taken as 0.
JP1857180A 1980-02-19 1980-02-19 Transmission method of video information Pending JPS56116365A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1857180A JPS56116365A (en) 1980-02-19 1980-02-19 Transmission method of video information

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1857180A JPS56116365A (en) 1980-02-19 1980-02-19 Transmission method of video information

Publications (1)

Publication Number Publication Date
JPS56116365A true JPS56116365A (en) 1981-09-12

Family

ID=11975301

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1857180A Pending JPS56116365A (en) 1980-02-19 1980-02-19 Transmission method of video information

Country Status (1)

Country Link
JP (1) JPS56116365A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4833545A (en) * 1986-08-15 1989-05-23 Kabushiki Kaisha Kenwood Receiver system of image signal from weather satellite

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4833545A (en) * 1986-08-15 1989-05-23 Kabushiki Kaisha Kenwood Receiver system of image signal from weather satellite

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