JPH03252873A - Picture processing system - Google Patents

Picture processing system

Info

Publication number
JPH03252873A
JPH03252873A JP5087790A JP5087790A JPH03252873A JP H03252873 A JPH03252873 A JP H03252873A JP 5087790 A JP5087790 A JP 5087790A JP 5087790 A JP5087790 A JP 5087790A JP H03252873 A JPH03252873 A JP H03252873A
Authority
JP
Japan
Prior art keywords
data
image data
compressed
frb
line
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
JP5087790A
Other languages
Japanese (ja)
Inventor
Tadashi Fujishiro
藤城　忠
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP5087790A priority Critical patent/JPH03252873A/en
Publication of JPH03252873A publication Critical patent/JPH03252873A/en
Pending legal-status Critical Current

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  • Processing Or Creating Images (AREA)

Abstract

PURPOSE:To obtain a display system for picture data which is high in its processing efficiency and inexpensive by provided an expansion unit between a CPU and a frame buffer. CONSTITUTION:A central processing unit 1 reads the compressed picture data from an external storage device 2 through a data line 11 or receives the compressed picture data through a line 3, and transfers it to the expansion unit 4 through the data line 12. The expansion unit 4 expands the compressed picture data, and converts it into data writable in the frame buffer (FRB) 5, and transfers it through the data line 41. Thus, since the compressed data is expanded in the course of the transfer of the data to the FRB 5, the processing efficiency can be raised, and besides, since the data on the data line 12 is the compressed data, the bus of high performance need not be used as well.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は画像データを扱うコンビ、ｌ−タシステムに関
し、特にフレームバッファ（ＦＲＢ）に対する画像デー
タ表示方式に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a combination/lutter system that handles image data, and particularly to an image data display method for a frame buffer (FRB).

〔従来の技術〕[Conventional technology]

従来、画像データを扱うコンビエータシ又テムは画像デ
ータの性質上データ量が膨大になる為、画像データを二
値データ又は多値データとして圧縮し外部記憶装置に保
存する方式を採用している０本データをＦＲＢを通して
ＣＲＴ上に表示するには、外部記憶装置から圧縮された
データを続出し、ＣＰＵで伸張するか又は特別な伸張装
置により伸張したデータをＦＲＢに転送することにより
行われている。Conventionally, combiator systems that handle image data have adopted a method of compressing the image data as binary or multivalued data and storing it in an external storage device, since the amount of data is enormous due to the nature of image data. Displaying data on a CRT through an FRB is performed by sequentially outputting compressed data from an external storage device, decompressing it with a CPU, or transferring the decompressed data using a special decompression device to the FRB.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上述した従来の画像処理方式はＣＰＵで画像データを伸
張するか又は特別な伸張装置で伸張後ＦＲＢに転送して
いる為、以下の欠点がある。The conventional image processing method described above has the following drawbacks because the image data is decompressed by the CPU or is decompressed by a special decompression device and then transferred to the FRB.

（１）伸張処理と表示処理が別々の為、処理効率が悪い
。(1) Processing efficiency is poor because decompression processing and display processing are separate.

（２）ＣＰｔＪからＦＲＢに対し大容量のデータ転送を
行う為、ＣＰ　ＵとＦＲＢ間を結ぶバスは高性能のもの
が必要となり、高価格となる。(2) Since a large amount of data is transferred from CPtJ to FRB, the bus connecting the CPU and FRB needs to be of high performance, resulting in high cost.

本発明の目的は、上記欠点を解決するために、ＣＰＵと
ＦＲＢの間に伸張ユニットを設けることにより、処理効
率の良い安価な画像データの表示方式を提供することに
ある。SUMMARY OF THE INVENTION In order to solve the above-mentioned drawbacks, an object of the present invention is to provide an inexpensive image data display method with high processing efficiency by providing a decompression unit between the CPU and the FRB.

〔課題を解決するための手段〕[Means to solve the problem]

本発明の画像処理方式は、圧縮した画像データを保存す
る外部記憶装置と、圧縮された画像データを伸張処理す
る伸張ユニットと、伸張した画像データを表示するフレ
ームバッファとを有する。The image processing method of the present invention includes an external storage device that stores compressed image data, a decompression unit that decompresses the compressed image data, and a frame buffer that displays the decompressed image data.

〔実施例〕〔Example〕

次に本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.

第１図は本発明の一実施例を示すブロック図である。同
図において画像処理方式は、外部記憶装置Ｆ２又は回線
３から画像データを読出し又は受取り伸張ユニット４を
介しＦＲＢ５へ転送する中央処理装置１と、圧縮した画
像データを保存する外部記憶装置２と、圧縮画像データ
を転送する回線３と、中央処理装置１から受取った圧縮
画像データを伸張しＦＲＢ５に書込可能なデータに変換
する伸張ユニット４と、ＣＲＴ６に表示する為のデュア
ルポートＲＡＭのＦＲＢ５と、画像データを表示するＣ
ＲＴ６とからなる。FIG. 1 is a block diagram showing one embodiment of the present invention. In the figure, the image processing system includes a central processing unit 1 that reads image data from an external storage device F2 or a line 3 or transfers it to the FRB 5 via a reception and decompression unit 4, and an external storage device 2 that stores compressed image data. A line 3 for transferring compressed image data, a decompression unit 4 for decompressing the compressed image data received from the central processing unit 1 and converting it into data that can be written to the FRB 5, and a dual port RAM FRB 5 for displaying on the CRT 6. , C that displays the image data
It consists of RT6.

中央処理装置１は外部記憶装ｆ２からデータ線１１を介
し、圧縮さ−れた画像データを読出すが又は回線３を通
して圧縮された画像データを受信し、伸張ユニット４ヘ
データ線１２を介し転送する。The central processing unit 1 reads compressed image data from an external storage device f2 via a data line 11, or receives compressed image data via a line 3, and transfers it to the decompression unit 4 via a data line 12. .

伸張ユニット４は圧縮された画像データを伸張しＦＲＢ
５へ書込み可能データに変換し、データ線４１を介して
転送する。The decompression unit 4 decompresses the compressed image data and sends it to FRB.
5 into writable data and transferred via the data line 41.

上記のように圧縮データの伸張をＦＲＢへデータ転送過
程で行う為、処理効率を高めることができる。又データ
線１２上のデータは圧縮データである為、高性能のバス
も使用しなくても良い。As described above, since the compressed data is expanded during the data transfer process to the FRB, processing efficiency can be improved. Furthermore, since the data on the data line 12 is compressed data, there is no need to use a high-performance bus.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明は、画像データを扱うコンピ
ュータシステムにおいて、ＦＲＢ内又はＦＲＢの前段に
画像データの伸張機能を設けることにより、画像データ
の処理効率を高め、又ＣＰＵとＦＲＢを結ぶバス上には
圧縮されたデータが転送される為、データ量が少なく安
価なバスを利用出来るという効果がある。As explained above, the present invention improves the processing efficiency of image data by providing an image data decompression function within the FRB or before the FRB in a computer system that handles image data. Because compressed data is transferred, it has the advantage of being able to use an inexpensive bus with a small amount of data.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の画像処理方式の一実施例を示す楕或図
である。 １・・・中央処理装置、２・・・外部記憶装置、４・・
・伸張ユニット、５・・・フレームバッファ、６・・・
表示装置。FIG. 1 is an elliptical diagram showing an embodiment of the image processing method of the present invention. 1...Central processing unit, 2...External storage device, 4...
- Decompression unit, 5...Frame buffer, 6...
Display device.

Claims (1)

【特許請求の範囲】[Claims] 圧縮した画像データを保存する外部記憶装置と、圧縮さ
れた画像データを伸張処理する伸張ユニットと、伸張し
た画像データを表示するフレームバッファとを有するこ
とを特徴とする画像処理方式。An image processing method comprising an external storage device that stores compressed image data, an expansion unit that expands the compressed image data, and a frame buffer that displays the expanded image data.
JP5087790A 1990-03-02 1990-03-02 Picture processing system Pending JPH03252873A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5087790A JPH03252873A (en) 1990-03-02 1990-03-02 Picture processing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5087790A JPH03252873A (en) 1990-03-02 1990-03-02 Picture processing system

Publications (1)

Publication Number Publication Date
JPH03252873A true JPH03252873A (en) 1991-11-12

Family

ID=12870953

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5087790A Pending JPH03252873A (en) 1990-03-02 1990-03-02 Picture processing system

Country Status (1)

Country Link
JP (1) JPH03252873A (en)

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