5 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 mobile spatial communication through coding of the metadata-assisted spatial audio (MASA) format. The MASA format is a new parametric audio format designed for spatial audio capture and representation from varying mobile device microph…
We address in this paper the problem of designing high bit-rate spherical vector quantization (VQ) to achieve transparent joint coding of angular values (azimuth and elevation) representing source directions in parametric spatial audio coding. We present the design of three coding methods using an o…
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…
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…