JPS5683176A - Compression and restoration system for video data - Google Patents

Compression and restoration system for video data

Info

Publication number
JPS5683176A
JPS5683176A JP15811479A JP15811479A JPS5683176A JP S5683176 A JPS5683176 A JP S5683176A JP 15811479 A JP15811479 A JP 15811479A JP 15811479 A JP15811479 A JP 15811479A JP S5683176 A JPS5683176 A JP S5683176A
Authority
JP
Japan
Prior art keywords
video
primary
data
tone
compressing
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
JP15811479A
Other languages
Japanese (ja)
Inventor
Hajime Shinraki
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.)
Fuji Electric Co Ltd
Fuji Facom Corp
Original Assignee
Fuji Electric Co Ltd
Fuji Facom Corp
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 Fuji Electric Co Ltd, Fuji Facom Corp filed Critical Fuji Electric Co Ltd
Priority to JP15811479A priority Critical patent/JPS5683176A/en
Publication of JPS5683176A publication Critical patent/JPS5683176A/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

Abstract

PURPOSE:To make a memory device light-weight in weight and to achieve restored pictue with fidelity, by restoring the video data with the primary and secondary restoring processes, after compressing the data and recording it with the primary and secondary compressing processes. CONSTITUTION:The video data VD in multivalue at the primary compressing process 11 is sequentially sampled into 2X2 video elements from the top and the average tone is calculated to form the primary compressing data. In the secondary compressing process 12, the primary compressing data is sampled into 4X4 video elements, and the maximum and minimum tone of each block, and the value in hierarchy with each tone are stored in the file 13 in the recording form with the bit number according to the difference of tone. In the primary restoration process 14, the hierarchy in the compressed block is converted into tone and restored to the video data in 2X2 video elements. In the secondary restoring process 15, the primary restoring data is sampled in the unit of 3X3 video elements, and the center video element each 3X3 video element is decomposed into 2X2 video elements through the tone of the surrounding video elements, to pick up the restored video VD.
JP15811479A 1979-12-07 1979-12-07 Compression and restoration system for video data Pending JPS5683176A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15811479A JPS5683176A (en) 1979-12-07 1979-12-07 Compression and restoration system for video data

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15811479A JPS5683176A (en) 1979-12-07 1979-12-07 Compression and restoration system for video data

Publications (1)

Publication Number Publication Date
JPS5683176A true JPS5683176A (en) 1981-07-07

Family

ID=15664603

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15811479A Pending JPS5683176A (en) 1979-12-07 1979-12-07 Compression and restoration system for video data

Country Status (1)

Country Link
JP (1) JPS5683176A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61147689A (en) * 1984-12-21 1986-07-05 Sony Corp Highly efficient tv signal encoding device
JPS62128621A (en) * 1985-11-29 1987-06-10 Sony Corp High-efficient coding device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61147689A (en) * 1984-12-21 1986-07-05 Sony Corp Highly efficient tv signal encoding device
JPS62128621A (en) * 1985-11-29 1987-06-10 Sony Corp High-efficient coding device

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