VOIP transmitter and receiver devices and methods therefor

Details VOIP transmitter and receiver devices and methods therefor VOIP transmitter and receiver devices and methods therefor

2006-02-14

2006-02-14

Nguyen, Chau (Department: 2663)

Multiplex communications

Communication over free space

Combining or distributing information via time channels

C370S352000, C370S516000

Reexamination Certificate

active

06999447

ABSTRACT:
A Voice Over Internet Protocol (VOIP) receiver (630), operating in conjunction with a transmitter (606) receives a sequence of voice packets representing a speech utterance transmitted over a VOIP wireless interface (112). A receive packet buffer (120) buffers the received sequence of voice packets after receipt and before playback of reconstructed speech. A processor (650), operating under program control, determines a transmission buffer (108) delay of a first packet in the sequence of packets representing the speech utterance. The control processor (650) further sets a prescribed amount of delay in the receive packet buffer (120) based upon the transmission buffer (108) delay so that the transmission buffer delay+receive buffer delay=a predetermined total delay. The status of the receiver buffer (120) is monitored and tracked by or fed back to the transmitter side to minimize receive buffer (120) under-runs by use of CDMA soft capacity (200), link dependent prioritization (300), real-time packet prioritization (400) and/or variation of vocoder (624) rates (500).

REFERENCES:
patent: 6259677 (2001-07-01), Jain
patent: 6434139 (2002-08-01), Liu et al.
patent: 6466550 (2002-10-01), Foster et al.
patent: 6693899 (2004-02-01), Makridakis
patent: 6788651 (2004-09-01), Brent et al.
Nanda, Sanjiv et al., Bell Labs, Lucent Technologies, “Adaption Techniques in Wireless Packet Data Services,” IEEE Communications Magazine, Jan. 2000, pp. 54-64.

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