Title :
Overview of the EVS codec architecture
Author :
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 ;
Abstract :
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.
Keywords :
3G mobile communication; audio coding; codecs; video coding; 3GPP codec; AMR-WB interoperable mode; EVS codec architecture; enhanced voice services; full-band content; low-delay real-time communication systems; packet loss; speech-audio quality; switched low delay speech/audio codec; Bit rate; Codecs; Delays; Speech; Speech coding; Switches; audio coding; mobile communication; speech coding;
Conference_Titel :
Acoustics, Speech and Signal Processing (ICASSP), 2015 IEEE International Conference on
Conference_Location :
South Brisbane, QLD
DOI :
10.1109/ICASSP.2015.7179063
