JPS61189664U - - Google Patents
Info
- Publication number
- JPS61189664U JPS61189664U JP7075685U JP7075685U JPS61189664U JP S61189664 U JPS61189664 U JP S61189664U JP 7075685 U JP7075685 U JP 7075685U JP 7075685 U JP7075685 U JP 7075685U JP S61189664 U JPS61189664 U JP S61189664U
- Authority
- JP
- Japan
- Prior art keywords
- compression
- circuit
- compressed data
- selection
- outputs
- 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
- 238000007906 compression Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 7
- 238000013144 data compression Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
Description
第１図は本考案のデータ圧縮装置の実施例を示
すブロツク図、第２図はその圧縮回路の動作フロ
ーチヤート、第３図はその圧縮データの概念図、
第４図は被圧縮データの例を示す説明図、第５図
と第６図はそれぞれ別々の符号化テーブルの内容
を示す説明図、第７図と第８図はそれぞれ別々の
被圧縮データの走査方式を示す説明図、第９図は
４種の変換処理結果を比較する説明図、第１０図
と第１１図とは従来知られているデータの圧縮方
式の説明図である。
１１……入力回路、１２……圧縮回路、１３…
…選択回路、１４……比較回路、１２３１〜１２
３ｎ，２１……圧縮データ、１２４１〜１２４ｎ
，２２……圧縮情報。
FIG. 1 is a block diagram showing an embodiment of the data compression device of the present invention, FIG. 2 is an operation flowchart of the compression circuit, and FIG. 3 is a conceptual diagram of the compressed data.
Fig. 4 is an explanatory diagram showing an example of compressed data, Figs. 5 and 6 are explanatory diagrams showing the contents of separate encoding tables, and Figs. 7 and 8 are explanatory diagrams showing the contents of separate encoding tables, respectively. FIG. 9 is an explanatory diagram showing a scanning method, FIG. 9 is an explanatory diagram comparing four types of conversion processing results, and FIGS. 10 and 11 are explanatory diagrams of conventionally known data compression methods. 11...Input circuit, 12...Compression circuit, 13...
...Selection circuit, 14...Comparison circuit, 12 31 to 12
3 n, 21... Compressed data, 12 41 to 12 4 n
, 22... Compressed information.
Claims (1)
縮データを所定量入力する入力回路と、前記被圧
縮データをそれぞれ異なる形式の圧縮データに変
換する複数の圧縮回路と、この圧縮回路で変換さ
れた圧縮データの１つを選択して出力する選択回
路と、この選択回路の選択動作を指定するための
選択信号を出力する比較回路とから成り、前記圧
縮回路は前記被圧縮データに圧縮形式を示す圧縮
情報を付加して前記選択回路に出力すると共に、
この圧縮データ長を示すデータ長情報を前記比較
回路に対して出力し、この比較回路は前記複数の
圧縮回路が出力するデータ長情報を比較して最も
圧縮度の高い圧縮データを選択して出力するよう
前記選択回路に選択信号を出力することを特徴と
するデータ圧縮装置。 An input circuit that inputs a predetermined amount of compressed data obtained by converting image information into an image signal pixel by pixel, and a plurality of compression circuits that convert the compressed data into compressed data of different formats. The compression circuit includes a selection circuit that selects and outputs one of the compressed data, and a comparison circuit that outputs a selection signal for specifying the selection operation of this selection circuit. output to the selection circuit with addition of compression information indicating
Data length information indicating this compressed data length is output to the comparison circuit, and this comparison circuit compares the data length information output by the plurality of compression circuits, selects and outputs the compressed data with the highest degree of compression. A data compression device characterized in that the data compression device outputs a selection signal to the selection circuit so as to select the selection signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7075685U JPS61189664U (en) | 1985-05-15 | 1985-05-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7075685U JPS61189664U (en) | 1985-05-15 | 1985-05-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61189664U true JPS61189664U (en) | 1986-11-26 |
Family
ID=30607628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7075685U Pending JPS61189664U (en) | 1985-05-15 | 1985-05-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61189664U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04115671A (en) * | 1990-08-31 | 1992-04-16 | Nec Corp | Binary picture encoding circuit |
-
1985
- 1985-05-15 JP JP7075685U patent/JPS61189664U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04115671A (en) * | 1990-08-31 | 1992-04-16 | Nec Corp | Binary picture encoding circuit |
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