JPS6461124A - Crc circuit - Google Patents
Crc circuitInfo
- Publication number
- JPS6461124A JPS6461124A JP21774187A JP21774187A JPS6461124A JP S6461124 A JPS6461124 A JP S6461124A JP 21774187 A JP21774187 A JP 21774187A JP 21774187 A JP21774187 A JP 21774187A JP S6461124 A JPS6461124 A JP S6461124A
- Authority
- JP
- Japan
- Prior art keywords
- frame
- circuit
- generation polynomial
- bit
- information 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
Landscapes
- Error Detection And Correction (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
Abstract
PURPOSE:To simplify circuit constitution by dividing a PCM signal by a generation polynomial without separating an information bit and a check bit in the PCM signal and deciding directly the presence of a transmission bit error by the result. CONSTITUTION:When a sequence converting circuit 3 is added with a frame of an odd number in a received PCM signal 1, the result is added to a frame information bit to a generation polynomial dividing circuit 4, stores a CRC check bit of the frame to a memory provided in the inside tentatively in receiving an even order number frame, the information bit of the frame of number #7(#15) is outputted and the CRC check bit stored in the memory is outputted. The generation polynomial dividing circuit 4 divides by information bit and the CRC check bit by the same generation polynomial as that at the sender side and supplies the residue to a transmission error deciding circuit 5, which decides it if the residue supplied from the generation polynomial division circuit 4 is zero as the absence of transmission error and decides it as the presence of transmission error if the residue exists.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21774187A JPS6461124A (en) | 1987-08-31 | 1987-08-31 | Crc circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21774187A JPS6461124A (en) | 1987-08-31 | 1987-08-31 | Crc circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6461124A true JPS6461124A (en) | 1989-03-08 |
Family
ID=16709027
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21774187A Pending JPS6461124A (en) | 1987-08-31 | 1987-08-31 | Crc circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6461124A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0631703A1 (en) * | 1992-12-29 | 1995-01-04 | Codex Corporation | Efficient crc remainder coefficient generation and checking device and method |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4852414A (en) * | 1971-11-05 | 1973-07-23 |
-
1987
- 1987-08-31 JP JP21774187A patent/JPS6461124A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4852414A (en) * | 1971-11-05 | 1973-07-23 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0631703A1 (en) * | 1992-12-29 | 1995-01-04 | Codex Corporation | Efficient crc remainder coefficient generation and checking device and method |
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