MDCT audio coding with pulse vector quantizers
This paper describes a novel audio coding algorithm that is a building block in the recently standardized 3GPP EVS codec. The presented scheme operates in the Modified Discrete Cosine Transform (MDCT) domain and deploys a Split-PVQ pulse coding quantizer, a noise-fill, and a gain control optimized for the quantizer’s properties. A complexity analysis in terms of WMOPS is presented to illustrate that the proposed Split-PVQ concept and dynamic range optimized MPVQ-indexing are suitable for real-time audio coding.
Test results from formal MOS subjective evaluations and objective performance figures are presented to illustrate the competitiveness of the proposed algorithm.
Full abstract in IEEE Xplore, DOI: 10.1109/ICASSP.2015.7179111
Jonas Svedberg, Volodya Grancharov, Sigurdur Sverrisson, Erik Norvell, Tomas Toftgård, Harald Pobloth, Stefan Bruhn.
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