JPS6413817A - Analog digital signal processing circuit - Google Patents
Analog digital signal processing circuitInfo
- Publication number
- JPS6413817A JPS6413817A JP62171492A JP17149287A JPS6413817A JP S6413817 A JPS6413817 A JP S6413817A JP 62171492 A JP62171492 A JP 62171492A JP 17149287 A JP17149287 A JP 17149287A JP S6413817 A JPS6413817 A JP S6413817A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- converter
- compression
- digital signal
- signal processing
- 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
Abstract
PURPOSE:To attain highly accurate digital signal processing by providing a compression circuit before an A/D converter and providing an expansion circuit after the A/D converter so as to improve the quantization accuracy of thc A/D converter without increasing the cost. CONSTITUTION:This circuit consists of an AGC circuit 1, a compression circuit 2 having a standard gamma-nu characteristic, a general 8-bit A/B converter 3 and an expansion circuit 4 expanding 8-bit into 10-bit and correcting the compression error of the compression circuit 2. Through the constitution above, an original signal is inputted through a switch 8, compressed by the compression circuit 2 via the AGC circuit 1, digitized by the A/D converter 3, the result is expanded by a ROM 11 and the characteristic change due to temperature of the compression circuit 2 is corrected by the RAM 15 to attain accurate expansion. Then the processing is applied by a digital signal processing circuit 38, D/A-converted by the D/A converter 5 and outputted through an LPF 6.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62171492A JPS6413817A (en) | 1987-07-08 | 1987-07-08 | Analog digital signal processing circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62171492A JPS6413817A (en) | 1987-07-08 | 1987-07-08 | Analog digital signal processing circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6413817A true JPS6413817A (en) | 1989-01-18 |
Family
ID=15924099
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62171492A Pending JPS6413817A (en) | 1987-07-08 | 1987-07-08 | Analog digital signal processing circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6413817A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06104755A (en) * | 1992-09-22 | 1994-04-15 | Matsushita Electric Ind Co Ltd | Non-linear quantizer |
FR2698509A1 (en) * | 1992-11-25 | 1994-05-27 | Nikon Corp | Set of selecting a data compression factor for camera. |
-
1987
- 1987-07-08 JP JP62171492A patent/JPS6413817A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06104755A (en) * | 1992-09-22 | 1994-04-15 | Matsushita Electric Ind Co Ltd | Non-linear quantizer |
FR2698509A1 (en) * | 1992-11-25 | 1994-05-27 | Nikon Corp | Set of selecting a data compression factor for camera. |
US5467129A (en) * | 1992-11-25 | 1995-11-14 | Nikon Corporation | Camera with automatic data compression factor selection |
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