Overview of the EVS codec architecture

The recently standardized 3GPP codec for Enhanced Voice Services (EVS) offers new features and improvements for low-delay real-time communication systems. Based on a novel, switched low-delay speech/audio codec, the EVS codec contains various tools for better compression efficiency and higher qualit...

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Bibliographic Details
Main Authors: Dietz, Martin, Multrus, Markus, Eksler, Vaclav, Malenovsky, Vladimir, Norvell, Erik, Pobloth, Harald, Lei Miao, Zhe Wang, Laaksonen, Lasse, Vasilache, Adriana, Kamamoto, Yutaka, Kikuiri, Kei, Ragot, Stephane, Faure, Julien, Ehara, Hiroyuki, Rajendran, Vivek, Atti, Venkatraman, Hosang Sung, Eunmi Oh, Hao Yuan, Changbao Zhu
Format: Conference Proceeding
Language:English
Subjects:
audio coding
Bit rate
Codecs
Delays
mobile communication
Speech
Speech coding
Switches
Online Access:Request full text
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Summary:The recently standardized 3GPP codec for Enhanced Voice Services (EVS) offers new features and improvements for low-delay real-time communication systems. Based on a novel, switched low-delay speech/audio codec, the EVS codec contains various tools for better compression efficiency and higher quality for clean/noisy speech, mixed content and music, including support for wideband, super-wideband and full-band content. The EVS codec operates in a broad range of bitrates, is highly robust against packet loss and provides an AMR-WB interoperable mode for compatibility with existing systems. This paper gives an overview of the underlying architecture as well as the novel technologies in the EVS codec and presents listening test results showing the performance of the new codec in terms of compression and speech/audio quality.
ISSN:1520-6149
2379-190X
DOI:10.1109/ICASSP.2015.7179063