4 accepted papers
The new 3GPP IVAS codec for immersive voice and audio communication services in 5G networks supports a variety of spatial audio formats beyond mono and stereo voice and audio, and even combinations of them. This paper presents the OMASA combined audio format which provides a joint coding of object-b…
The 3GPP Immersive Voice and Audio Services (IVAS) codec enables spatial audio communications using either stereo, multi-channel, Scene-Based Audio (SBA), objects or Metadata-Assisted Spatial Audio (MASA) formats. Combinations such as objects together with SBA or MASA are also supported. This paper…
This paper proposes a flexible encoding technique based on multi-stage multiple scale lattice vector quantization and block-constrained trellis coded vector quantization. It is used for the spectrum encoding, more precisely encoding of the LSF parameters, and incorporated in the recently standardize…
This paper discusses the voice and audio quality characteristics of EVS, the recently standardized 3GPP codec. Comparison to Opus, IETF driven open source codec as well as industry standard voice codecs: 3GPP AMR and AMR-WB, and ITU-T G.718B, G.722.1C and G.719 as well as direct signals at varying b…