JPS5730464A - Adaptive forecasting and encoding device - Google Patents
Adaptive forecasting and encoding deviceInfo
- Publication number
- JPS5730464A JPS5730464A JP10452080A JP10452080A JPS5730464A JP S5730464 A JPS5730464 A JP S5730464A JP 10452080 A JP10452080 A JP 10452080A JP 10452080 A JP10452080 A JP 10452080A JP S5730464 A JPS5730464 A JP S5730464A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- forecast
- forecasting
- multiplexer
- terminal
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Image Processing (AREA)
Abstract
PURPOSE:To obtain sufficient forecasting effect for a picture signal having a halftone photograph and characters mixed in one block by selecting a forecast error signal, obtained by a forecasting device, by picture elements and by encoding the error signal simultaneously. CONSTITUTION:A sampled and binary-coded picture signal is applied to a terminal 1, and this sampled value X is supplied to a line memory 2 and forecasting devices 3a1 and 3a2. Those forecasting devices 3a1 and 3a2 are each composed of a shift register and a ROM, and output forecast values P1 and P2. Then, the forecast values P1 and P2 are exclusively ORed with a sample value X by exclusive OR circuits 5a1 and 5a2 to be converted into forecast error signals Y1 and Y2, which are inputted to a multiplexer 6a. Its output Y is sent to a selection signal generating circuit 4a, which sends a forecast selection signal M1 to the multiplexer 6a and an error signal E to an encoder 7. Then, the signal E is encoded and sent out from a terminal 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10452080A JPS5730464A (en) | 1980-07-30 | 1980-07-30 | Adaptive forecasting and encoding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10452080A JPS5730464A (en) | 1980-07-30 | 1980-07-30 | Adaptive forecasting and encoding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5730464A true JPS5730464A (en) | 1982-02-18 |
| JPH0132703B2 JPH0132703B2 (en) | 1989-07-10 |
Family
ID=14382760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10452080A Granted JPS5730464A (en) | 1980-07-30 | 1980-07-30 | Adaptive forecasting and encoding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5730464A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6012865A (en) * | 1983-07-01 | 1985-01-23 | Canon Inc | Highly efficient encoding system of picture data |
| JPS6052167A (en) * | 1983-09-01 | 1985-03-25 | Nec Corp | Adaptive forecasting coder |
| JPS6096964A (en) * | 1983-10-11 | 1985-05-30 | ゼロツクス コーポレーシヨン | Device and method for adaptively predicing image data |
| JPS6229372A (en) * | 1985-07-31 | 1987-02-07 | インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション | Compression of binary data |
-
1980
- 1980-07-30 JP JP10452080A patent/JPS5730464A/en active Granted
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6012865A (en) * | 1983-07-01 | 1985-01-23 | Canon Inc | Highly efficient encoding system of picture data |
| JPH0478068B2 (en) * | 1983-07-01 | 1992-12-10 | Canon Kk | |
| JPS6052167A (en) * | 1983-09-01 | 1985-03-25 | Nec Corp | Adaptive forecasting coder |
| JPS6096964A (en) * | 1983-10-11 | 1985-05-30 | ゼロツクス コーポレーシヨン | Device and method for adaptively predicing image data |
| JPS6229372A (en) * | 1985-07-31 | 1987-02-07 | インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション | Compression of binary data |
| JPH0448311B2 (en) * | 1985-07-31 | 1992-08-06 | Intaanashonaru Bijinesu Mashiinzu Corp |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0132703B2 (en) | 1989-07-10 |
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