JPS6429036A - Pcm communication equipment with cyclic code inspection - Google Patents
Pcm communication equipment with cyclic code inspectionInfo
- Publication number
- JPS6429036A JPS6429036A JP18456487A JP18456487A JPS6429036A JP S6429036 A JPS6429036 A JP S6429036A JP 18456487 A JP18456487 A JP 18456487A JP 18456487 A JP18456487 A JP 18456487A JP S6429036 A JPS6429036 A JP S6429036A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- cyclic code
- counter
- code inspection
- frame synchronization
- 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)
- Time-Division Multiplex Systems (AREA)
Abstract
PURPOSE:To improve the quality of a PCM circuit by feeding back the result of cyclic code inspection to a clock input gate circuit through a counter and a shift circuit. CONSTITUTION:A PCM signal from a PCM signal input terminal 1 is inputted to a frame synchronization detection circuit 2. When the frame synchronization detection circuit 2 detects frame synchronization, it opens the gate of the clock input gate circuit 4, and sends a clock to a frame synchronization counter 5. A cyclic code inspection circuit 7 compares a check bit for the cyclic code inspection in the PCM signal and the cyclic code inspection value of the PCM signal, and when the comparison results in discordance, it counts up an error counter 8. When the count-up of the error counter 8 reaches a prescribed value, a counter circuit 9 closes the clock input gate circuit 4 for one clock portion, and delays the frame synchronization counter 5 and a timing generation circuit 6, and delays a frame synchronizing timing signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18456487A JPS6429036A (en) | 1987-07-23 | 1987-07-23 | Pcm communication equipment with cyclic code inspection |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18456487A JPS6429036A (en) | 1987-07-23 | 1987-07-23 | Pcm communication equipment with cyclic code inspection |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6429036A true JPS6429036A (en) | 1989-01-31 |
Family
ID=16155413
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18456487A Pending JPS6429036A (en) | 1987-07-23 | 1987-07-23 | Pcm communication equipment with cyclic code inspection |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6429036A (en) |
-
1987
- 1987-07-23 JP JP18456487A patent/JPS6429036A/en active Pending
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