Codec-assisted capacity enhancement of wireless VoIP

Details Codec-assisted capacity enhancement of wireless VoIP Codec-assisted capacity enhancement of wireless VoIP

2003-12-19

2009-06-09

Lamarre, Guy J (Department: 2112)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S749000, C714S750000, C709S231000, C704S001000, C375S220000

Reexamination Certificate

active

07546508

ABSTRACT:
The use of a cellular system's packet data channel for transport of speech communications is enhanced by dynamically controlling the transmission of data packets that were received in error and notified to the transmitter by the receiver in accordance with an algorithm that takes into account a self-generated determination of the perceptual quality importance of the frame and is generated once for each frame by the speech encoder. The calculation of the frame importance is codec-dependent, and depends on a number of attributes associated with each particular frame, including the frame rate (for variable-rate codecs), signal classification, transition characteristics, background noise, previous frame erasures, etc. The selective reduction in transmission and retransmission increases the capacity of the cellular system while maintaining or even improving the quality of the received voice signal.

REFERENCES:
patent: 3815105 (1974-06-01), Adkins et al.
patent: 4594591 (1986-06-01), Burke
patent: 4914654 (1990-04-01), Matsuda et al.
patent: 5768527 (1998-06-01), Zhu et al.
patent: 5790551 (1998-08-01), Chan
patent: 2001/0023465 (2001-09-01), Haneda et al.
patent: 2002/0106011 (2002-08-01), Fujii et al.
patent: 2003/0002501 (2003-01-01), Reme
patent: 2003/0226094 (2003-12-01), Fukushima et al.
patent: 2003/0235196 (2003-12-01), Balachandran et al.
patent: 0795991 (1997-09-01), None
patent: WO-00/52873 (2000-09-01), None
patent: 02056544 (2002-07-01), None
patent: WO-2004/002087 (2003-12-01), None
Whetten et al. ‘An Overview of Reliable Multicast Transport Protocol II,’ pp. 37-47, IEEE, Feb. 2000.
Sunshine‘Efficiency of Interprocess Communications Protocols for Computer Networks,’ pp. 287-293, IEEE, Feb. 1977.
Miyamoto, S. et al., “A High-Quality Video Multicast Scheme with a Time Limit”, IEEE Global Telecommunications Conference, Taipei, Taiwan, Nov. 17-21, 2002, vol. 1 of 3, pp. 1598-1602.

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