JPS55134576A - Still picture transmission system - Google Patents
Still picture transmission systemInfo
- 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
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.
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)
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 |
-
1979
- 1979-04-09 JP JP4201979A patent/JPS55134576A/en active Pending
Cited By (11)
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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