GB1523218A - Parity checking arrangements - Google Patents
Parity checking arrangementsInfo
- Publication number
- GB1523218A GB1523218A GB3990476A GB3990476A GB1523218A GB 1523218 A GB1523218 A GB 1523218A GB 3990476 A GB3990476 A GB 3990476A GB 3990476 A GB3990476 A GB 3990476A GB 1523218 A GB1523218 A GB 1523218A
- Authority
- GB
- United Kingdom
- Prior art keywords
- parity
- fields
- message
- check
- field
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
- H04L1/0063—Single parity check
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Detection And Correction Of Errors (AREA)
Abstract
1523218 Parity checking PLESSEY CO Ltd 3 Feb 1977 [25 Sept 1976] 39904/76 Heading H4P A message comprising a plurality F 1, F2, F3 of data fields and a parity bit PO is enabled by signal POK to pass to field storage elements S1, S2, S3 only provided that the parity check for the message as a whole, performed by checker PC 1 as well as a parity check involving the parity bit PO, and field parity bits P1-P3 generated and PG1-3 from the respective fields, are both successful. Before a message of fields FA, FB, FC, can be read out, their parity is determined by generator PG4, whose output POR is checked at PC3 with the field parity bits PA-PC. Should the check be successful register RO is enabled to store the fields and the generated parity bit POR.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3990476A GB1523218A (en) | 1977-02-03 | 1977-02-03 | Parity checking arrangements |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3990476A GB1523218A (en) | 1977-02-03 | 1977-02-03 | Parity checking arrangements |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1523218A true GB1523218A (en) | 1978-08-31 |
Family
ID=10412117
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3990476A Expired GB1523218A (en) | 1977-02-03 | 1977-02-03 | Parity checking arrangements |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1523218A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0013885A2 (en) * | 1979-01-26 | 1980-08-06 | International Business Machines Corporation | Method of avoiding undesirable parity error signals during the parity check of a register array and parity check device for carrying out the method |
-
1977
- 1977-02-03 GB GB3990476A patent/GB1523218A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0013885A2 (en) * | 1979-01-26 | 1980-08-06 | International Business Machines Corporation | Method of avoiding undesirable parity error signals during the parity check of a register array and parity check device for carrying out the method |
EP0013885A3 (en) * | 1979-01-26 | 1981-04-01 | International Business Machines Corporation | Parity check device for a register array |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |