Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2011-05-31
2011-05-31
Flynn, Nathan (Department: 2468)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C370S250000, C370S252000
Reexamination Certificate
active
07953069
ABSTRACT:
An audio and/or visual transmission quality device estimates transmission quality as perceived by a user based on observation and processing of objective metrics. The device preferably includes a primary integrator to generate an instantaneous estimate of user annoyance based on occurrence of frame loss events in a received signal. The device further preferably includes secondary integrators to process the instantaneous estimate of user annoyance in selected time intervals and generate a plurality of time-varying estimates of user annoyance valid over the selected time intervals. The device may further include a plurality of scaling modules to scale the plurality of time-varying estimates and generate a corresponding plurality of estimates of transmission quality as perceived by the user. The device may further include a modulation network to modify a sensitivity of the primary integrator to the occurrence of frame loss events in the received signal.
REFERENCES:
patent: 6654463 (2003-11-01), Leonidov et al.
patent: 2004/0071084 (2004-04-01), El-Hennawey et al.
Cisco Technology Inc.
Flynn Nathan
Mullen Justin N
Stolowitz Ford Cowger LLP
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