Method and an arrangement for sound reconstruction during erasur

Details Method and an arrangement for sound reconstruction during erasur Method and an arrangement for sound reconstruction during erasur

1995-11-09

1998-03-24

Bost, Dwayne

Telecommunications

Radiotelephone system

Including private cordless extension system

455403, 455422, 395 22, 395 237, H04M 1100, H04Q 700

Patent

active

057323569

ABSTRACT:
Digital audio or sound information such a speech is typically transmitted in bursts or packets containing a plurality of digitized sound samples. For the reconstruction of such a digital data stream in the presence of erasures or mutes, a method and an arrangement is disclosed, in which at a data receiver having an audio processing portion a plurality of successively data bursts outputted from a speech buffer are stored into a cyclic buffer. During an erasure, the data stream is reconstructed by outputting into the speech buffer stored bursts in their reversed order of storage. By reusing the bursts while reversing the sequence of the digitized sound samples, a virtually click free reconstruction of the data stream is obtained. An embodiment for use with a cordless telephone system is described.

REFERENCES:
patent: 5513183 (1996-04-01), Kay et al.
patent: 5535299 (1996-07-01), Riedel
patent: 5615298 (1997-03-01), Chen
European Search Report, Date of completion of search: 30 Mar. 1995.
Varma et al., "Performance of 32kb/s ADPCM in Frame Erasures", Proceedings of the 44th IEEE Vehicular Technology Conference, vol. 2, pp. 1291-1295 (Jun. 8, 1994).
S. Kubota et al, "Improved ADPCM Voice Transmission Employing Click Noise Detection Scheme for TDMA-TDD Systems", The Fourth International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC'93), pp. 613, 613&617 (Sep. 8-11, 1993).
K. Enomoto et al., "A Very Low Power Consumption ADPCM Voice Codec LSIC for Personal Communication Systems", PIMRC'93, pp. 481, 483 & 485.

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