Digital bit rate converter

Details Digital bit rate converter Digital bit rate converter

1975-05-30

1977-05-24

Safourek, Benedict V.

Telegraphy

Systems

Line-clearing and circuit maintenance

179 15AF, 179 15BS, 179 1555T, H04J 306

Patent

active

040257207

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.

REFERENCES:
patent: 3042751 (1962-07-01), Graham
patent: 3136861 (1964-06-01), Mayo
patent: 3426153 (1969-02-01), Kitsopoulos
patent: 3539997 (1970-11-01), Mahony
patent: 3550082 (1970-12-01), Tong

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