JPS6449450A - Header detecting method - Google Patents
Header detecting methodInfo
- Publication number
- JPS6449450A JPS6449450A JP20711487A JP20711487A JPS6449450A JP S6449450 A JPS6449450 A JP S6449450A JP 20711487 A JP20711487 A JP 20711487A JP 20711487 A JP20711487 A JP 20711487A JP S6449450 A JPS6449450 A JP S6449450A
- Authority
- JP
- Japan
- Prior art keywords
- header
- register
- inspection
- circuit
- data
- 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
Landscapes
- Detection And Prevention Of Errors In Transmission (AREA)
Abstract
PURPOSE:To correctly detect a header and to improve transmission efficiency, by performing error inspection after detecting the code of the header, and shifting a reading position in a memory sequentially until the correct result of the error inspection is obtained. CONSTITUTION:When a shift register 3 reads data of one block, a switch 2 is connected to (b) side, then, the output terminal Q of the register 3 is connected to the input terminal of the register. Simultaneously, the data is supplied from the terminal Q of the register 3 to a header detection circuit 5 and a CRC inspection circuit 6 in synchronism with a clock signal. When the header detection circuit 5 detects the same code as that of the header, the circuit 6 is reset, and CRC inspection is started. When an error exists in the result of the CRC inspection, the register 3 shifts again a readout data position by every bit until the circuit 5 finds out the same code as that of the header. In such a way, when the correct result of the CRC inspection is obtained, the data is sent from a multiplexer 8 via a port 9.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20711487A JPS6449450A (en) | 1987-08-20 | 1987-08-20 | Header detecting method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20711487A JPS6449450A (en) | 1987-08-20 | 1987-08-20 | Header detecting method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6449450A true JPS6449450A (en) | 1989-02-23 |
Family
ID=16534427
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20711487A Pending JPS6449450A (en) | 1987-08-20 | 1987-08-20 | Header detecting method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6449450A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5112706A (en) * | 1974-07-20 | 1976-01-31 | Nippon Electric Co | |
JPS5614743A (en) * | 1979-07-18 | 1981-02-13 | Matsushita Electric Ind Co Ltd | Signal transmitter |
JPS59221047A (en) * | 1983-05-30 | 1984-12-12 | Victor Co Of Japan Ltd | Synchronizing signal detecting circuit for digital signal transmission |
-
1987
- 1987-08-20 JP JP20711487A patent/JPS6449450A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5112706A (en) * | 1974-07-20 | 1976-01-31 | Nippon Electric Co | |
JPS5614743A (en) * | 1979-07-18 | 1981-02-13 | Matsushita Electric Ind Co Ltd | Signal transmitter |
JPS59221047A (en) * | 1983-05-30 | 1984-12-12 | Victor Co Of Japan Ltd | Synchronizing signal detecting circuit for digital signal transmission |
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