Digital bit rate converter
US4025720A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 30, 1975 |
| Grant date | May 24, 1977 |
| Priority date | — |
| Expiry date | May 30, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/07
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a digital communication system, apparatus for upconverting the bit rate, f.sub.1, of a digital data source to permit digital transmission at a bit rate f.sub.2, where f.sub.2 > f.sub.1. Pulse stuffing techniques are used to insert a fixed number of time slots in the digital data signal such that the ratio of information time slots to stuffed time slots remains constant. The upconverted signal, consisting of nonredundant data bits and stuffed time slots, is interleaved with framing bits prior to transmission over a digital facility. The framing bits provide the synchronization information to enable the receiver to identify the added time slots and to selectively remove the information data bits from the transmitted line signal. The desired data bits are then restored to their original f.sub.1 bit rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.