System and method of compensating propagation time variations an

Details System and method of compensating propagation time variations an System and method of compensating propagation time variations an

1995-10-30

1997-03-25

Chin, Wellington

Multiplex communications

Communication over free space

Combining or distributing information via time channels

370474, H04J 314

Patent

active

056152140

ABSTRACT:
In a packetized communication system, packets are dispatched to a receiving node (10) for reassembly and presentation to a user. Packets propagating over dynamic paths have propagation variations between subsequent packets. Interactive packetized voice communication systems mandate that end-to-end delays be minimized. This results in voice gaps between an on-time synthesized voice data (602"') and a subsequent delayed synthesized voice data (603"'). Voice gaps are temporarily patched with voice prediction samples and end-to-end timing is adjusted to minimized prediction samples. When packets are lost in the network, prediction packets are substituted and annunciated to a user until valid packets are received.

REFERENCES:
patent: 4864561 (1989-09-01), Ashenfelter et al.
patent: 5353062 (1994-10-01), Maeda

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