8th European Conference on Speech Communication and Technology

Geneva, Switzerland
September 1-4, 2003


Voicing Controlled Frame Loss Concealment for Adaptive Multi-Rate (AMR) Speech Frames in Voice-Over-IP

Frank Mertz (1), Herve Taddei (2), Imre Varga (2), Peter Vary (1)

(1) RWTH Aachen, Germany
(2) Siemens AG, Germany

In this paper we present a voicing controlled, speech parameter based frame loss concealment for frames that have been encoded with the Adaptive Multi-Rate (AMR) speech codec. The missing parameters are estimated by interpolation and extrapolation techniques that are chosen in dependence of the voicing state of the speech frames preceding and following the lost frames. The voicing controlled concealment outperforms the conventional extrapolation/muting based approach and it shows a consistent improvement over interpolation techniques that do not distinguish between voiced and unvoiced speech. The quality can be further improved if additional information about the predictor states of predictively encoded parameters is available from a redundant transmission in future packets.

Full Paper

Bibliographic reference.  Mertz, Frank / Taddei, Herve / Varga, Imre / Vary, Peter (2003): "Voicing controlled frame loss concealment for adaptive multi-rate (AMR) speech frames in voice-over-IP", In EUROSPEECH-2003, 1077-1080.