JPS5683141A - Data compression circuit - Google Patents
Data compression circuitInfo
- Publication number
- JPS5683141A JPS5683141A JP16315179A JP16315179A JPS5683141A JP S5683141 A JPS5683141 A JP S5683141A JP 16315179 A JP16315179 A JP 16315179A JP 16315179 A JP16315179 A JP 16315179A JP S5683141 A JPS5683141 A JP S5683141A
- Authority
- JP
- Japan
- Prior art keywords
- data
- converter
- fed
- compressor
- bit
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
Abstract
PURPOSE:To reduce the number of bits to be handled after the A/D converter and to enable the compression with high accuracy, by performing digitization at the A/D converter having greater picked-up bit number and extracting and using the bit only corresponding to the required level among the digital data. CONSTITUTION:An analog signal from an input device 1 is digitized at an A/D converter 2, this digitized data is fed to a data compressor 6 and fed to the level detector 4. The level of data detected at the detector 4 is fed to a compressor 6 via a selector controller 5. The compressor 6 is provided with data selectors 7a- 7d so that the data signal from an input terminal (a) can be selected with the output of the controller 5 from a control signal input terminal (b), and the bit only corresponding to the required level among the data signal is fed to the data processor 3. Thus, the bits to be handled after the converter 2 are reduced in number, allowing to make compression with high accuracy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16315179A JPS5683141A (en) | 1979-12-11 | 1979-12-11 | Data compression circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16315179A JPS5683141A (en) | 1979-12-11 | 1979-12-11 | Data compression circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5683141A true JPS5683141A (en) | 1981-07-07 |
Family
ID=15768185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16315179A Pending JPS5683141A (en) | 1979-12-11 | 1979-12-11 | Data compression circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5683141A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60130936A (en) * | 1983-12-19 | 1985-07-12 | Nec Corp | Data decoding circuit |
| JPS61147691A (en) * | 1984-12-21 | 1986-07-05 | Sony Corp | Highly efficiency tv signal encoding device |
| JPS6271390A (en) * | 1985-05-10 | 1987-04-02 | Matsushita Electric Ind Co Ltd | Intermediate-level setting circuit for video |
-
1979
- 1979-12-11 JP JP16315179A patent/JPS5683141A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60130936A (en) * | 1983-12-19 | 1985-07-12 | Nec Corp | Data decoding circuit |
| JPS61147691A (en) * | 1984-12-21 | 1986-07-05 | Sony Corp | Highly efficiency tv signal encoding device |
| JPS6271390A (en) * | 1985-05-10 | 1987-04-02 | Matsushita Electric Ind Co Ltd | Intermediate-level setting circuit for video |
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