EVS Technology

EVS represents a significant advancement for voice and audio compression over prior standards. EVS was standardized by 3GPP in September 2014 at the conclusion of a process that spanned four years. The 3GPP specifications for EVS can be accessed here. The standardization effort involved the combined efforts of chipset manufacturers, handset and infrastructure manufacturers, operators, and other technology providers. 

EVS, among other features, enables vastly improved audio and voice quality and network capacity. The standardized EVS codec serves a number of markets and applications, including high-definition voice services plus (“HD Voice+”) in wireless telephony, content for media audio, and mobile voice over internet protocol (“VoIP”). 

EVS is designed for high quality and efficient coding of speech, music, and mixed content. The benefits of EVS are not however limited to mobile applications and implementations in mobile phones. EVS may be used in other products, including other wireless devices, landline phone systems, desktop computers, videoconferencing systems, and telecommunications and multimedia infrastructure equipment. 

For the user, EVS provides numerous benefits, including the following:

• Delivers higher quality, higher frame/packet error resilience, and higher compression efficiency than previous codecs, leading to an improved user experience and system efficiency;

• Increases the voice capacity with the same or even better quality than HD Voice;

• Enhances the voice and music quality with the same capacity;

• Can be used for high quality music services; and

• Provides improved telecom grade quality and capacity tradeoff.