JPS55134576A - Still picture transmission system - Google Patents

Still picture transmission system

Info

Publication number
JPS55134576A
JPS55134576A JP4201979A JP4201979A JPS55134576A JP S55134576 A JPS55134576 A JP S55134576A JP 4201979 A JP4201979 A JP 4201979A JP 4201979 A JP4201979 A JP 4201979A JP S55134576 A JPS55134576 A JP S55134576A
Authority
JP
Japan
Prior art keywords
signal
output
converted
block
picture
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
JP4201979A
Other languages
Japanese (ja)
Inventor
Kunio Matsumoto
Motoaki Hayakawa
Yasukazu Muranushi
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP4201979A priority Critical patent/JPS55134576A/en
Publication of JPS55134576A publication Critical patent/JPS55134576A/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 save transmitted information by making an input picture signal into blocks of each picture element, by cross-converting them and then by sequentially transmitting the conversion outputs from the lowest-order output. CONSTITUTION:Analog signal 31 obtained by a sequential scan is applied to terminal 30 and A/D-converted 32 into digital signal 33, which is sent to block-dividing circuit 34 to obtain blocks of a foxed-line picture element. Block-divided signal 35 is cross-converted 36 and the conversion output is stored in frame memory 38. After the conversion of one picture, coding circuit 40 codes the output to output coded signal 41 from terminal 42. At the reception side, input signal 41 is decoded 44 and the decoding signal is stored in frame memory 45. Stored signal 46 is cross- converted 47 reversely and the output 48 is supplied to block restoring circuit 49 to obtain sequential scanning signal 50, which is D/A-converted 51 into the original signal before outputted from terminal 53. At the transmission side, sequential transmission comes into effect from the lowest-order block and at the reception side, the transmission is stopped when the desired quality of the picture can be obtained halfway, so that the transmitted information can be saved.
JP4201979A 1979-04-09 1979-04-09 Still picture transmission system Pending JPS55134576A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4201979A JPS55134576A (en) 1979-04-09 1979-04-09 Still picture transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4201979A JPS55134576A (en) 1979-04-09 1979-04-09 Still picture transmission system

Publications (1)

Publication Number Publication Date
JPS55134576A true JPS55134576A (en) 1980-10-20

Family

ID=12624450

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4201979A Pending JPS55134576A (en) 1979-04-09 1979-04-09 Still picture transmission system

Country Status (1)

Country Link
JP (1) JPS55134576A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5875390A (en) * 1981-07-22 1983-05-07 ブリティシュ・テレコミュニケーションズ・パブリック・リミテッド・カンパニ Video transmitting method and device
JPH01213069A (en) * 1988-02-22 1989-08-25 Canon Inc Decoding system for encoded data
JPH01213085A (en) * 1988-02-22 1989-08-25 Canon Inc Picture encoding transmission system
JPH029271A (en) * 1988-06-28 1990-01-12 Konica Corp Compression rate conversion method for picture data
JPH02105679A (en) * 1988-10-14 1990-04-18 Fuji Photo Film Co Ltd Reproducing device and recorder for digital image
JPH03160880A (en) * 1989-11-18 1991-07-10 Nec Home Electron Ltd Transmission system for dct-sq compressed still picture
WO1997037496A1 (en) * 1996-03-29 1997-10-09 Sony Corporation Image receiver, image reception method, image transmitter, image transmission method, image transmitter/receiver and image transmission/reception method
WO2003079692A1 (en) * 2002-03-19 2003-09-25 Fujitsu Limited Hierarchical encoder and decoder

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5875390A (en) * 1981-07-22 1983-05-07 ブリティシュ・テレコミュニケーションズ・パブリック・リミテッド・カンパニ Video transmitting method and device
JPH0326600B2 (en) * 1981-07-22 1991-04-11 Buriteitsushu Terekomyunikeeshonzu Plc
JPH01213069A (en) * 1988-02-22 1989-08-25 Canon Inc Decoding system for encoded data
JPH01213085A (en) * 1988-02-22 1989-08-25 Canon Inc Picture encoding transmission system
JPH029271A (en) * 1988-06-28 1990-01-12 Konica Corp Compression rate conversion method for picture data
JP2627927B2 (en) * 1988-06-28 1997-07-09 コニカ株式会社 Image data compression rate conversion method
JPH02105679A (en) * 1988-10-14 1990-04-18 Fuji Photo Film Co Ltd Reproducing device and recorder for digital image
JPH03160880A (en) * 1989-11-18 1991-07-10 Nec Home Electron Ltd Transmission system for dct-sq compressed still picture
WO1997037496A1 (en) * 1996-03-29 1997-10-09 Sony Corporation Image receiver, image reception method, image transmitter, image transmission method, image transmitter/receiver and image transmission/reception method
WO2003079692A1 (en) * 2002-03-19 2003-09-25 Fujitsu Limited Hierarchical encoder and decoder
US6911920B2 (en) 2002-03-19 2005-06-28 Fujitsu Limited Hierarchical encoding and decoding devices

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