System for digitized voice and data with means to compensate for

Details System for digitized voice and data with means to compensate for System for digitized voice and data with means to compensate for

1983-07-05

1985-08-27

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 85, 370 94, H04J 302, H04Q 1104, H04J 600

Patent

active

045382590

ABSTRACT:
In a communications system in which voice is transmitted as packets of digitized samples, a receiving station delays the output of the first packet in a way that compensates for wide variations in the intervals at which successive packets are received. According to one feature of this system, a first packet is transmitted at a higher priority so that a greater delay can be used without encounter problems that arise from the uncertainty in the delay in transmitting this packet. In another feature of this system, the arrival time of the first few packets of a conversation are detected and the delay is readjusted in case the first packet has been unusually delayed.

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patent: 4237553 (1980-12-01), Larsen
patent: 4292623 (1981-09-01), Eswaran et al.
patent: 4312065 (1982-01-01), Ulug
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IEEE Transactions on Communications, vol. COM-28, No. 2; Feb. 1980; pp. 217-227; Barberis et al.; "Analysis and Optimal Design of a Packet-Voice Receiver".
Patents Abstracts of Japan, vol. 5, No. 181, Nov. 20, 1981; p. 157 E 83, Hitachi et al.; 01-09-1981.
International Conference on Communications; Jun. 14-18, 1981; vol. 2, pp. 41.6.1-41.6.5; Suzuki et al.; "An Adaptive Control on Length of Jitter Absorbing Buffer in Packet Speech System".
IEEE Proceedings, vol. 130, part G, No. 4; Aug. 1983; pp. 105-113; Clarke et al.; "Experiments with Packet Switching of Voice Traffic".

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