JPH01293781A - Picture storing system - Google Patents
Picture storing systemInfo
- Publication number
- JPH01293781A JPH01293781A JP63124425A JP12442588A JPH01293781A JP H01293781 A JPH01293781 A JP H01293781A JP 63124425 A JP63124425 A JP 63124425A JP 12442588 A JP12442588 A JP 12442588A JP H01293781 A JPH01293781 A JP H01293781A
- Authority
- JP
- Japan
- Prior art keywords
- scanning lines
- picture information
- compressed
- even number
- sampling
- 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
Links
- 238000005070 sampling Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000001629 suppression Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
Landscapes
- Transforming Electric Information Into Light Information (AREA)
- Processing Of Color Television Signals (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は所定本数の走査線からなる画像情報を１／ｎ
（ｎは偶数）に圧縮して記憶する画像記憶方式に関す
るものである。[Detailed Description of the Invention] [Industrial Application Field] This invention provides image information consisting of a predetermined number of scanning lines to 1/n
This relates to an image storage method that compresses and stores images (n is an even number).
第２図はテレビシコン等の画像を示す説明図である。同
図に示すように、画像は垂直方向に伝送されるｍ本の走
査線ＳＬ１．ＳＬ２．−．ＳＬｍにより構成されている
。FIG. 2 is an explanatory diagram showing an image of a television screen, etc. As shown in the figure, the image is transmitted by m scanning lines SL1. SL2. −． It is composed of SLm.
このため、画像情報を圧縮して記憶するに際しては、所
定の走査線ＳＬのみを予ナンブリングすることが行われ
てきた。例えば画像情報を１／２に圧縮して記憶する場
合は、走査線ＳＬを２本当り１本の割合でサンプリング
して記憶すればよい。For this reason, when compressing and storing image information, only predetermined scanning lines SL have been prenumbered. For example, when image information is compressed to 1/2 and stored, it is sufficient to sample and store one scanning line SL for every two scanning lines SL.
従来、上記したサンプリングは走査線ＳＬを垂直方向に
等間隔に抽出することで行われた。例えば画像情報を１
／２に圧縮する場合、奇数番目の走査ＦＪＳＬ１．ＳＬ
３．ＳＬ５．・・・、 ＳＬ （２１−１）あるいは偶
数番目の走査線ＳＬ２．ＳＬ４゜ＳＬ６．・・・、５Ｌ
（２ｔ）をサンプリングすればよい。Conventionally, the above-described sampling has been performed by extracting the scanning lines SL at equal intervals in the vertical direction. For example, image information is 1
/2, the odd-numbered scan FJSL1. SL
3. SL5. ..., SL (21-1) or even-numbered scanning line SL2. SL4゜SL6. ..., 5L
(2t) may be sampled.
ところで、カラーテレビジョン技術におけるＰＡ Ｌ
（Ｐｈａｓｅ Ａｌｔｅｒｎａｔｉｏｎ ｂｙ Ｌｉｎ
ｅ）方式は１走査線ごとに色位相を反転させて色変調を
行い復調時に復調位相ずれがあっても、垂直方向に隣接
する走査線ＳＬｊ、ＳＬ ＜ｊ＋１＞（ｊは１〜（ｍ−
１））間で逆位相となり視覚上打ち消しあうことで色ひ
ずみ抑圧を図ついる。By the way, PAL in color television technology
(Phase Alternation by Lin
e) method performs color modulation by inverting the color phase for each scanning line, and even if there is a demodulation phase shift during demodulation, the vertically adjacent scanning lines SLj, SL
1)) are in opposite phase and visually cancel each other out, thereby suppressing color distortion.
第３図は、ＰＡＬ方式の走査線による画像を示す説明図
である。同図に示すように、実線で示した走査線ＳＬ
（ＳＬｌ、ＳＬ３．・・・）と破線で示した走査線ＳＬ
（ＳＬ２．ＳＬ４．・・・、）は互いに色位相が反転
している。FIG. 3 is an explanatory diagram showing an image based on scanning lines of the PAL system. As shown in the figure, the scanning line SL indicated by a solid line
(SLl, SL3...) and the scanning line SL indicated by a broken line
(SL2, SL4...,) have mutually inverted color phases.
このようなＰＡＬ方式の画像情報に対し、従来の画像記
憶方式で１／２圧縮記憶を行うと、ＳＬｌ、ＳＬ３．Ｓ
Ｌ５．・・・（ＳＬ２．ＳＬ４．ＳＬ６、・・・）と同
一色位相の走査線のみサンプリングすることになり、こ
の記憶内容を再生し画像表示すれば、伝送路における色
ひずみが抑圧されずそのまま現われてしまう問題点があ
った。また、同様の問題点が個数分の−に等間隔で画像
情報を圧縮する場合にも当てはまる。When such PAL image information is compressed to 1/2 and stored using a conventional image storage method, SL1, SL3. S
L5. ...(SL2.SL4.SL6,...) will sample only the scanning lines with the same color phase, and if this stored content is reproduced and displayed as an image, the color distortion in the transmission path will not be suppressed and will appear as is. There was a problem with this. Further, the same problem applies to the case where image information is compressed at equal intervals corresponding to the number of images.
この発明は上記のような問題点を解決するためになされ
たもので、Ｐ Ａ Ｌ方式の色ひずみ抑圧効果を生かし
つつ、画像情報を個数分の−に圧縮することができる画
像記憶方式を得ることを目的とする。This invention was made in order to solve the above-mentioned problems, and provides an image storage method that can compress image information into a number of pieces while taking advantage of the color distortion suppression effect of the PAL method. The purpose is to
この発明にかかる画像記憶方式は、所定本数の走査線か
らなる画像情報を１／ｎ（ｎは偶数）に圧縮して記憶す
るに際し、奇数番目の走査線と偶数番目の走査線を交互
にサンプリングしている。The image storage method according to the present invention alternately samples odd-numbered scanning lines and even-numbered scanning lines when compressing and storing image information consisting of a predetermined number of scanning lines to 1/n (n is an even number). are doing.
（作用）
この発明においては、奇数番目の走査線と偶数番目の走
査線を交互にサンプリングしているため、ＰＡＬ方式の
色ひずみ効果を維持して記憶することができる。(Operation) In the present invention, since odd-numbered scanning lines and even-numbered scanning lines are sampled alternately, it is possible to maintain and store the color distortion effect of the PAL system.
第１図はこの発明の一実施例である画像記憶方式の説明
用のＰＡＬ方式の画像を示す説明図である。同図におい
て、左側のＱ印がサンプリングする走査線を示している
。FIG. 1 is an explanatory diagram showing an image of a PAL system for explaining an image storage system according to an embodiment of the present invention. In the figure, the mark Q on the left side indicates the scanning line to be sampled.
同図に示づ゛ように、画像情報の１／２圧縮を走査線Ｓ
Ｌ１．ＳＬ２．ＳＬ５．ＳＬ６．ＳＬ９゜５Ｌ１０．・
・・と奇数番目と偶数番目の走査線を交互にサンプリン
グすることで行っている。従って、ＰＡＬ方式の邑ひず
み抑圧効果を圧縮箋の画像情報にも、そのまま反映する
ことができる。また、４本の走査線ＳＬに２本の割合で
サンプリングすることで１／２を圧縮維持できる。As shown in the figure, 1/2 compression of the image information is performed on the scanning line S.
L1. SL2. SL5. SL6. SL9゜5L10.・
This is done by alternately sampling odd-numbered and even-numbered scanning lines. Therefore, the distortion suppression effect of the PAL system can be directly reflected in the image information of the compressed note. Further, by sampling at a ratio of two out of four scanning lines SL, compression can be maintained at 1/2.
なお、この実施例では、画像情報の１／２圧縮の走査線
（ノンブリングについて述べたが、１／４圧縮の場合は
例えばＳＬｌ、ＳＬ４．ＳＬ９．８Ｌ１２ ・ Ｓ
Ｌｌ ７． ５Ｌ２０． ・・・ （’ＳＬ９
以 （陰 （よ図示せず）とサンプリングすること
でこの発明を適用することができるのは勿論、個数分の
−に画像情報を圧縮記憶する場合全てにおいて、奇数番
目の走査線と偶数番目の走査線を交互にサンプリングす
ることによりこの発明を適用することができる。In addition, in this embodiment, scanning lines of 1/2 compression of image information (non-bringing was described, but in the case of 1/4 compression, for example, SL1, SL4.SL9.8L12, S
Ll 7. 5L20. ... ('SL9
It goes without saying that the present invention can be applied by sampling (not shown), but in all cases where image information is compressed and stored in a number of -, odd-numbered scanning lines and even-numbered scanning lines are used. The invention can be applied by sampling the scan lines alternately.
以上説明したように、この発明によれば、奇数番目の走
査線と偶数番目の走査線を交互にサンプリングしたため
、ＰＡＬ方式の色ひずみ抑圧効果を生かしつつ、画像情
報を個数分の−に圧縮することができる効果がある。As explained above, according to the present invention, since odd-numbered scanning lines and even-numbered scanning lines are sampled alternately, image information can be compressed to - the number of pieces while taking advantage of the color distortion suppression effect of the PAL system. There is an effect that can be done.
第１図はこの発明の一実施例である画像記憶方式説明用
のＰＡＬ方式による画像を示す説明図・第２図はテレビ
ジョン等の画像を示ず説明図、第３図はＰＡＬ方式によ
る画像を示す説明図である。
図において、ＳＬｉ （ｉ＝１．２．３．・・・）は走
査線である。
なお、各図中同一符号は同一または相当部分を示す。Fig. 1 is an explanatory diagram showing an image according to the PAL system for explaining the image storage system which is an embodiment of the present invention. Fig. 2 is an explanatory diagram showing an image of a television etc. without showing it. Fig. 3 is an explanatory diagram showing an image according to the PAL system. FIG. In the figure, SLi (i=1.2.3...) is a scanning line. Note that the same reference numerals in each figure indicate the same or corresponding parts.
Claims (1)
は偶数）に圧縮して記憶する画像記憶方式において、 奇数番目の走査線と偶数番目の走査線を交互にサンプリ
ングすることを特徴とする画像記憶方式。(1) Image information consisting of a predetermined number of scanning lines is 1/n (n
is an even number), and is characterized in that odd-numbered scanning lines and even-numbered scanning lines are alternately sampled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63124425A JP2526634B2 (en) | 1988-05-20 | 1988-05-20 | Image storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63124425A JP2526634B2 (en) | 1988-05-20 | 1988-05-20 | Image storage system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01293781A true JPH01293781A (en) | 1989-11-27 |
| JP2526634B2 JP2526634B2 (en) | 1996-08-21 |
Family
ID=14885168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63124425A Expired - Fee Related JP2526634B2 (en) | 1988-05-20 | 1988-05-20 | Image storage system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2526634B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5656082A (en) * | 1979-10-13 | 1981-05-16 | Sony Corp | Television receiver |
| JPS6351789A (en) * | 1986-08-20 | 1988-03-04 | Mitsubishi Electric Corp | Color picture multiplex still picture generator |
-
1988
- 1988-05-20 JP JP63124425A patent/JP2526634B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5656082A (en) * | 1979-10-13 | 1981-05-16 | Sony Corp | Television receiver |
| JPS6351789A (en) * | 1986-08-20 | 1988-03-04 | Mitsubishi Electric Corp | Color picture multiplex still picture generator |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2526634B2 (en) | 1996-08-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |