JPS6473874A - Method and device for coding image data - Google Patents

Method and device for coding image data

Info

Publication number
JPS6473874A
JPS6473874A JP22948287A JP22948287A JPS6473874A JP S6473874 A JPS6473874 A JP S6473874A JP 22948287 A JP22948287 A JP 22948287A JP 22948287 A JP22948287 A JP 22948287A JP S6473874 A JPS6473874 A JP S6473874A
Authority
JP
Japan
Prior art keywords
transform
interpolation
data
encoding
basic image
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.)
Granted
Application number
JP22948287A
Other languages
Japanese (ja)
Other versions
JP2501597B2 (en
Inventor
Hiroyuki Hamada
Toshikazu Ikenaga
Takehiko Yoshino
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.)
Japan Broadcasting Corp
Original Assignee
Nippon Hoso Kyokai NHK
Japan Broadcasting 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 Nippon Hoso Kyokai NHK, Japan Broadcasting Corp filed Critical Nippon Hoso Kyokai NHK
Priority to JP22948287A priority Critical patent/JP2501597B2/en
Publication of JPS6473874A publication Critical patent/JPS6473874A/en
Application granted granted Critical
Publication of JP2501597B2 publication Critical patent/JP2501597B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

PURPOSE:To improve interpolation efficiency, by arranging basic image element data in five-mesh grid shape, taking out a difference between interpolation data and image data corresponding to a block, and applying transform encoding on a taken out difference by a prescribed threshold value. CONSTITUTION:Sampled basic image data is inputted to an interpolation filter 5 at the next stage, and also, it is inputted to a multiplexer 9. At a mode decision circuit 7 at the next stage, an interpolation remainder is compared with a certain threshold value, and no transform encoding of the interpolation remainder is performed on the block whose interpolation remainder is smaller than the threshold value, and the transform encoding of interpolation remainder data are applied on the blocks other than that by a transform encoder 8, and transform encoded data is inputted to the multiplexer 9. In the multiplexer 9, one bit of mode information which represents the presence/absence of the transform encoding at every block from the mode decision circuit 7 and the transform encoded data from the transform encoder 8 and the basic image element data from a basic image element sub-sampling circuit 4 are multiplexed, and encoded data is sent after completing encoding.
JP22948287A 1987-09-16 1987-09-16 Image data encoding method and apparatus Expired - Lifetime JP2501597B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22948287A JP2501597B2 (en) 1987-09-16 1987-09-16 Image data encoding method and apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22948287A JP2501597B2 (en) 1987-09-16 1987-09-16 Image data encoding method and apparatus

Publications (2)

Publication Number Publication Date
JPS6473874A true JPS6473874A (en) 1989-03-20
JP2501597B2 JP2501597B2 (en) 1996-05-29

Family

ID=16892860

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22948287A Expired - Lifetime JP2501597B2 (en) 1987-09-16 1987-09-16 Image data encoding method and apparatus

Country Status (1)

Country Link
JP (1) JP2501597B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006217406A (en) * 2005-02-04 2006-08-17 Sony Corp Coding apparatus and method, decoding apparatus and method, recording medium, program, and image processing system and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006217406A (en) * 2005-02-04 2006-08-17 Sony Corp Coding apparatus and method, decoding apparatus and method, recording medium, program, and image processing system and method

Also Published As

Publication number Publication date
JP2501597B2 (en) 1996-05-29

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