The new 3GPP codec for Enhanced Voice Services (EVS) offers important 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 advancements 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 compatible 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 excellent performance of the new codec in terms of compression and speech/audio quality.
Full abstract in IEEE Xplore, DOI: 10.1109/ICASSP.2015.7179063
Martin Dietz, Markus Multrus, Fraunhofer Institute for Integrated Circuits (IIS); Vaclav Eksler, Vladimir Malenovsky, Voiceage Corporation; Erik Norvell, Harald Pobloth, Ericsson; Lei Miao, Zhe Wang, Huawei Technologies; Lasse Laaksonen, Adriana Vasilache, Nokia Technologies; Yutaka Kamamoto, Kei Kikuiri, NTT DOCOMO; Stephane Ragot, Julien Faure, Orange; Hiroyuki Ehara, Panasonic; Vivek Rajendran, Venkatraman Atti, Qualcomm Technologies, Inc.; Hosang Sung, Eunmi Oh, Samsung Electronics; Hao Yuan, Changbao Zhu, ZTE Corporation.
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