Source and channel rate adaptation for VoIP

Details Source and channel rate adaptation for VoIP Source and channel rate adaptation for VoIP

2007-11-13

2007-11-13

Marcelo, Melvin (Department: 2616)

Multiplex communications

Pathfinding or routing

Combined circuit switching and packet switching

C370S356000

Reexamination Certificate

active

10366944

ABSTRACT:
A coding system and method for a terminal including a multi-rate codec is disclosed. The terminal includes a multi-rate adaptive coder that is capable of transmitting a continuous voice stream transmission at a source code bit rate and a channel code bit rate. A quality of service probing module probes an end-to-end network path of the continuous voice stream transmission to obtain at least one quality of service parameter. A quality of service management module determines at least one constraint associated with the continuous voice stream transmission. An adaptive bit rate algorithm module dynamically adjusts the source code bit rate and the channel code bit rate as a function of the quality of service parameter and the constraint to obtain a maximum value of perceived user performance during the continuous voice stream transmission.

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