[{"name":"SP-251444","title":"Draft TS 26.251 v2.0.0","source":"SA WG4","contact":"Andrijana Brekalo","contact-id":91743,"tdoctype":"draft TS","for":"Approval","abstract":"Abstract of document: The codec for Immersive Voice and Audio Services (IVAS) is part of a framework comprising besides encoder and decoder, renderer associated with the support of stereo and immersive audio formats. The IVAS codec is an extension of the 3GPP Enhanced Voice Services (EVS) codec; it provides full and bit exact EVS codec functionality for mono speech\/audio signal input. On top of that the IVAS codec is optimized for encoding and decoding of stereo and immersive audio formats, Immersive audio formats comprise multi-channel audio (5.1, 5.1.2, 5.1.4, 7.1, 7.1.4 setups), scene-based audio (Ambisonics up to order 3), metadata-assisted spatial audio (MASA), and object-based audio (Independent Stream with Metadata (ISM) up to 4 ISMs). In addition, the following combined immersive audio formats are supported: object-based audio with scene-based audio (OSBA, up to 4 ISMs with Ambisonics) and object-based audio with metadata-assisted spatial audio (OMASA, up to 4 ISMs with MASA). Rendering between many of the formats is supported, including binaural rendering for headphone reproduction with head-tracking and rendering to various loudspeaker configurations. The present technical specification TS26.251 (Codec for Immersive Voice and Audio Services; C code (fixed-point)) contains: - Specification of C code structure - Fixed-point C code of the IVAS codec as electronic attachment, in IVAS Software Version 3.0. Changes since last presentation to SA Plenary #103: Electronic attachment with fixed-point C code added. Outstanding Issues: None. Contentious Issues: None.","secretary_remarks":"This DRAFT TS was approved (Rel-19).","agenda_item_sort_order":89,"ainumber":"7.2.4","ainame":"SA WG4 Specifications for Approval","tdoc_agenda_sort_order":12060,"status":"approved","reservation_date":"2025-11-28 13:40:43","uploaded":"2025-11-28 16:26:28","revisionof":"","revisedto":"","release":"Rel-19","crspec":"26.251","crspecversion":"2.0.0","workitem":[{"winame":"IVAS_Codec"}],"crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"","lsto":"","Cc":"","lsoriginalls":"","lsreply":"","link":"https:\/\/www.3gpp.org\/ftp\/tsg_sa\/TSG_SA\/TSGS_110_Baltimore_2025-12\/Docs\/SP-251444.zip","group":"SP","meeting":"SP-110","year":2025,"uicc_affected":"","me_affected":"","ran_affected":"","cn_affected":"","clauses_affected":"","crsinpack":null,"crsinpacknumber":0}]