Internet telephone and method for recovering voice data lost...

Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital data error correction

Reexamination Certificate

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Reexamination Certificate

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06981193

ABSTRACT:
The present invention relates to an internet telephone and a method for recovering voice data lost in the internet telephone. Whether there is any voice data lost in a voice data packet received via the internet network and the position information for a lost portion of the voice data is obtained. A voice data normally received previously to the lost portion is filled in the lost portion of the voice data. In making a telephone call using the internet, the speech quality is improved by correcting the lost voice signal.

REFERENCES:
patent: 6549886 (2003-04-01), Partalo
patent: WO01/49005 (2001-07-01), None
Figueiredo et al., efficient mechanisms for recovering voice packets in the internet, 1999, IEEE, Global Telecommunication COnference, p. 1830-1837.
Goodman et al., waveform substitution techniques for recovering missing speech segments in packet voice communications, 1 1986, IEEE, Trans. on Acoustics, Speech & signal processing, vol. ASSP-34, No. 6, p. 14401448.
Huang et al., Robust audio transmission over internet with self-adjusting buffer control, 2000, Information Science, www.elsevier.com/locate/ins, p. 1-28.

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