Asynchronous multiplexer and demultiplexer combination
US3982077A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1975 |
| Grant date | Sep 21, 1976 |
| Priority date | — |
| Expiry date | Apr 7, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/1629
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An asynchronous digital time division multiplexer and demultiplexer combination at one communication terminal is disclosed that will multiplex first N asynchronous source data signals having a first mixture of different bit rates into a transmitted synchronous data stream having a predetermined fixed data format and a given bit rate greater than the total of the bit rates of the source data and to demultiplex second N asynchronous source data signals having a second mixture of different bit rates from a received synchronous data stream having the predetermined fixed data format and the given bit rate. The combination includes an automatic channel assignment circuit to assign channels of the two data streams to the asynchronous source data signals in a manner to minimize temporary data memory regardless of the number of different bit rates by assigning the data signals to channels of the associated one of the two data streams so that the bits of each of the data signals tend to have equal spacing throughout the bits of the associated one of the two data streams. The channel assignment control circuit also includes a means to automatically indicate when the total of the mixture of bi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.