Venkatesh Krishnan — 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

Low bit rate high-quality MDCT audio coding of the 3GPP EVS standard

Srikanth Nagisetty, Zongxian Liu, Takuya Kawashima, Hiroyuki Ehara, Xuan Zhou, Bin Wang +9

ICASSP 2015accepted

This paper presents a low bit-rate MDCT coder, which is adopted as a part of the recently standardized codec for Enhanced Voice Services. To maximize codec performance for NB to SWB input signals for low bit-rates (7.2 to 16.4 kbps), new adaptive bit-allocation and spectrum quantization schemes, whi…

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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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