MDCT audio coding with pulse vector quantizers

Autor:	Harald Pobloth, Sigurdur Sverrisson, Jonas Svedberg, Stefan Bruhn, Erik Norvell, Volodya Grancharov, Tomas Jansson Toftgård
Rok vydání:	2015
Předmět:	Adaptive Multi-Rate audio codec Modified discrete cosine transform Speech recognition Computer Science::Multimedia Speech coding Variable-length code Algorithm Coding tree unit Harmonic Vector Excitation Coding Transform coding Mathematics Sub-band coding
Zdroj:	ICASSP
DOI:	10.1109/icassp.2015.7179111
Popis:	This paper describes a novel audio coding algorithm that is a building block in the recently standardized 3GPP EVS codec [1]. 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::42484423b4c54c53986eae975bbed994 https://doi.org/10.1109/icassp.2015.7179111 Zobrazit plný text záznamu