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Enhanced time domain packet loss concealment in switched speech/audio codec

: Lecomte, Jérémie; Tomasek, Adrian; Markovic, Goran; Schnabel, Michael; Tsutsumi, Kimitaka; Kikuiri, Kei


Institute of Electrical and Electronics Engineers -IEEE-; IEEE Signal Processing Society:
IEEE 40th IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2015. Proceedings. Vol.8 : 19-24 April 2015, Brisbane, Australia
Piscataway, NJ: IEEE, 2015
ISBN: 978-1-4673-6997-8
ISBN: 978-1-4673-6998-5
International Conference on Acoustics, Speech, and Signal Processing (ICASSP) <40, 2015, Brisbane>
Fraunhofer IIS ()

This paper describes new time domain techniques for concealing packet loss in the new 3GPP Enhanced Voice Services codec. Enhancements to the existing ACELP concealment methods include guided, improved pitch prediction, increased flexibility and accuracy of pulse resynchronization. Furthermore, the new method of separate linear predictive (LP) filter synthesis aims for sound quality improvement in case of multiple packet loss, especially for noisy signals. Another enhancement consists of a guided LP concealment approach to limit the risk of creating artifacts during recovery. These enhancements are also used in the presented advanced TCX concealment method. Subjective listening tests show that quality is significantly increased with these methods.