JPS5580939A - Digital signal transmission method - Google Patents
Digital signal transmission methodInfo
- Publication number
- JPS5580939A JPS5580939A JP15511378A JP15511378A JPS5580939A JP S5580939 A JPS5580939 A JP S5580939A JP 15511378 A JP15511378 A JP 15511378A JP 15511378 A JP15511378 A JP 15511378A JP S5580939 A JPS5580939 A JP S5580939A
- Authority
- JP
- Japan
- Prior art keywords
- analog signal
- featuring
- digital signal
- dsv
- signal
- 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 make the DC component in the PCM digital signal approximate to zero as much as possible by allotting the digital signal featuring the zero DSV (digital sum variation) to the analog signal featuring a high occurring frequency quantization levels and thus changing the analog signal into PCM.
CONSTITUTION: In case the analog signal such as the video signal or the like is converted into the 8-bit code, the quantization level of the analog signal and its occurring frequency are as shown by the curve in the diagram. And in the DSV of the 8-bit code, i.e., in the binary data series, the value obtained through the cumulative sum with weighting of "0" and "1" to -1 and +1 respectively becomes 0, ±2, ±4, ±6 and ±8 each. And the smaller the value the smaller the DC component. In this connection, the digital signal of a small (large) DSV value is allotted to the analog signal featuring of the quantization level featuring a high (low) occurring frequency as shown in the diagram, thus performing the A/D conversion to attain the purpose mentioned above.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15511378A JPS5580939A (en) | 1978-12-14 | 1978-12-14 | Digital signal transmission method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15511378A JPS5580939A (en) | 1978-12-14 | 1978-12-14 | Digital signal transmission method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5580939A true JPS5580939A (en) | 1980-06-18 |
Family
ID=15598866
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15511378A Pending JPS5580939A (en) | 1978-12-14 | 1978-12-14 | Digital signal transmission method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5580939A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59189753A (en) * | 1983-04-11 | 1984-10-27 | Sony Corp | Transmitting device of digital data |
JPS6199419A (en) * | 1984-10-20 | 1986-05-17 | Canon Inc | Predictive encoding system |
JPS62136132A (en) * | 1985-12-10 | 1987-06-19 | Hitachi Ltd | Method and apparatus for modulating digital data |
JPS62243494A (en) * | 1986-04-16 | 1987-10-23 | Canon Inc | Coding system |
JPS62243425A (en) * | 1986-04-16 | 1987-10-23 | Canon Inc | Audio signal coding system |
JPS62243426A (en) * | 1986-04-16 | 1987-10-23 | Canon Inc | Data transmission system |
-
1978
- 1978-12-14 JP JP15511378A patent/JPS5580939A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59189753A (en) * | 1983-04-11 | 1984-10-27 | Sony Corp | Transmitting device of digital data |
JPH055214B2 (en) * | 1983-04-11 | 1993-01-21 | Sony Corp | |
JPS6199419A (en) * | 1984-10-20 | 1986-05-17 | Canon Inc | Predictive encoding system |
JPS62136132A (en) * | 1985-12-10 | 1987-06-19 | Hitachi Ltd | Method and apparatus for modulating digital data |
JPS62243494A (en) * | 1986-04-16 | 1987-10-23 | Canon Inc | Coding system |
JPS62243425A (en) * | 1986-04-16 | 1987-10-23 | Canon Inc | Audio signal coding system |
JPS62243426A (en) * | 1986-04-16 | 1987-10-23 | Canon Inc | Data transmission system |
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