Voice packet communications system with communications...

Details Voice packet communications system with communications... Voice packet communications system with communications...

2005-04-26

2005-04-26

Qureshi, A. (Department: 2667)

Multiplex communications

Pathfinding or routing

Combined circuit switching and packet switching

C370S230100, C370S394000, C340S870030

Reexamination Certificate

active

06885659

ABSTRACT:
A voice packet communications system which objectively evaluates the voice quality in real time. Voice packets received from a network are input into an adjustment circuit. The adjustment circuit evens out the periods of the voice packets, detects the drop-out of voice packets, and inserts substitute packets in the voice packet sequence. Furthermore, the adjustment circuit outputs the number of voice packets that have dropped out, the number of substitute packets that have been inserted, and the number of voice packets that have accumulated inside the circuit, as quality information in each monitoring period. A decoding circuit converts the voice packets adjusted by the adjustment circuit into voice information. A judgement circuit calculates an index that indicates the communications quality of the voice packets from the quality information using a specified calculation formula.

REFERENCES:
patent: 5130985 (1992-07-01), Kondo et al.
patent: 03054931 (1991-03-01), None
patent: 2000307637 (2000-02-01), None

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