Method and system for transmitting digitized voice signals as pa

Details Method and system for transmitting digitized voice signals as pa Method and system for transmitting digitized voice signals as pa

1985-05-20

1986-12-16

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 94, 3701101, H04J 317, H04J 324

Patent

active

046302620

ABSTRACT:
A method of transmitting digitized voice signals as packets of bits in a digital transmission network to which a plurality of terminals acting as sources of voice signals are attached. The method includes, at the transmitting end and for each source, the steps of: a dividing the signal into successive, digitally-coded segments; performing a so-called source activity detection; and assembling the bits resulting from the coding operation into packets, each packet being provided with a header containing, in particular, a parity bit whose logic value is modified whenever an inactivity or long pause is detected. At the receiving end, detection of a change in the value of said parity bit causes the delivery of a packet of bits to the decoder/synthesizer to be delayed by a given time interval called retention delay.

REFERENCES:
patent: 4100377 (1978-07-01), Flanagan
patent: 4284850 (1981-08-01), Clingenpeel
patent: 4382296 (1983-05-01), Joyce et al.
patent: 4433411 (1984-02-01), Gefroerer et al.

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