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Unified speech and audio coding scheme for high quality at low bitrates

: Neuendorf, M.; Gournay, P.; Multrus, M.; Lecomte, J.; Bessette, B.; Geiger, R.; Bayer, S.; Fuchs, G.; Hilpert, J.; Rettelbach, N.; Salami, R.; Schuller, G.; Lefebvre, R.; Grill, B.


IEEE Signal Processing Society:
IEEE International Conference on Acoustics, Speech, and Signal Processing 2009. Proceedings. Vol.1 : April 19 - 24, 2009, Taipei International Convention Center, Taipei, Taiwan
Piscataway/NJ: IEEE, 2009
ISBN: 978-1-4244-2353-8
ISBN: 978-1-4244-2354-5
International Conference on Acoustics, Speech, and Signal Processing (ICASSP) <34, 2009, Taipei>
Conference Paper
Fraunhofer IIS ()
Fraunhofer IDMT ()

Traditionally, speech coding and audio coding were separate worlds. Based on different technical approaches and different assumptions about the source signal, neither of the two coding schemes could efficiently represent both speech and music at low bitrates. This paper presents a unified speech and audio codec, which efficiently combines techniques from both worlds. This results in a codec that exhibits consistently high quality for speech, music and mixed audio content. The paper gives an overview of the codec architecture and presents results of formal listening tests comparing this new codec with HE-AAC(v2) and AMR-WB+. This new codec forms the basis of the reference model in the ongoing MPEG standardization activity for Unified Speech and Audio Coding.