System for parity calculation based on arithemtic difference between data
US5768295A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 1995 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Mar 10, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/14
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A communication system uses a main signal having a plurality of signal frames each of which has first data and a first monitor bit. The first monitor bit in one of the signal frames is determined by the first data in a preceding signal frame which next precedes the one of the signal frames. A data inserting device inserts second data into the main signal. A monitor bit producing device produces a second monitor bit in response to the first and the second data and the first monitor bit. The second monitor bit holds monitor data which have data of first monitor bits which are held in preceding signal frames which precede the one of the signal frames. A monitor bit changing device changes the first monitor bit into the second monitor bit in the one of the signal frames.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.