5 accepted papers
The Immersive Voice and Audio Services (IVAS) codec supports encoding of audio objects, represented as mono audio streams coupled with metadata describing the position (and orientation) of the objects. The format is called Independent Streams with Metadata (ISM). The audio objects may be rendered to…
The new 3GPP codec for Enhanced Voice Services (EVS) comprises a collection of frame loss concealment techniques, each specifically designed for the different coding modes of that codec. One of them, called “Phase Error Concealment Unit (Phase ECU)”, was developed for the High Quality (HQ) MDCT codi…
Audio coding of harmonic signals is a challenging task for conventional MDCT coding schemes. In this paper we introduce a novel algorithm for improved transform coding of harmonic audio. The algorithm does not deploy the conventional scheme of splitting the input signal into a spectrum envelope and…
This paper describes a novel audio coding algorithm that is a building block in the recently standardized 3GPP EVS codec [1]. The presented scheme operates in the Modified Discrete Cosine Transform (MDCT) domain and deploys a Split-PVQ pulse coding quantizer, a noise-fill, and a gain control optimiz…
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…