Duminda A. Dewasurendra — accepted AI-conference papers

2015

Improved error resilience for volte and VoIP with 3GPP EVS channel aware coding

Venkatraman Atti, Daniel J. Sinder, Shaminda Subasingha, Vivek Rajendran, Duminda A. Dewasurendra, Venkata Chebiyyam +6

ICASSP 2015accepted

A highly error resilient mode of the newly standardized 3GPP EVS speech codec is described. Compared to the AMR-WB codec and other conversational codecs, the EVS channel aware mode offers significantly improved error resilience in voice communication over packet-switched networks such as Voice-over-…

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2015

Linear prediction based comfort noise generation in the EVS codec

Zhe Wang, Lei Miao, Jon Gibbs, Tomas Toftgard, Martin Sehlstedt, Stefan Bruhn +3

ICASSP 2015accepted

A Discontinuous transmission (DTX) system, which is widely adopted in speech codecs, is an important function for speech communication systems that can reduce the transmission bandwidth by at least a half. Within a DTX system, the comfort noise generation (CNG) plays a key role in the overall qualit…

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2015

Super-wideband bandwidth extension for speech in the 3GPP EVS codec

Venkatraman Atti, Venkatesh Krishnan, Duminda A. Dewasurendra, Venkata Chebiyyam, Shaminda Subasingha, Daniel J. Sinder +6

ICASSP 2015accepted

This paper describes the time-domain bandwidth extension (TBE) framework employed to code wideband and super-wideband speech in the newly standardized 3GPP EVS codec. The TBE algorithm uses a nonlinear harmonic modeling technique that incorporates principles of time-domain envelope-modulated noise m…

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