Easy detection of head position of information data via reception processing unit in synchronous multiplex transmission apparatus
US5020057A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1989 |
| Grant date | May 28, 1991 |
| Priority date | — |
| Expiry date | Dec 4, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/0623
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A reception processing unit receives digital data in successive data frames, each frame comprising a supervisory data field and an associated information data field and, further, a negative stuff or a positive stuff in accordance with need, and detects the head position of the information data field. An enable signal is produced only during and throughout a time interval in which the information data field appears in each successive, received data frame; a count operation of a counter is performed only during the interval of the enable signal. The head position is detected each time the counter finishes counting a number of bytes equal to the fixed length of the information data field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.