[{"name":"SP-150012","title":"LS from SA WG4: LS reply on codec support in IMS-WebRTC","source":"SA WG4","contact":"Maurice Pope","contact-id":648,"tdoctype":"LS in","for":"Decision","abstract":"SA WG4 thanks CT WG1 for their LS on codec support in IMS-WebRTC. Since WebRTC IMS Clients in 3GPP UEs are used for real-time multimedia communication, and since transcoding has negative impacts on quality and consumes resources, SA WG4 recommendation is that WebRTC IMS clients in 3GPP UEs are required to comply with TS 26.114. Hence, for speech, WebRTC IMS clients in 3GPP UE - shall support AMR; - shall support AMR-WB if wideband speech is supported; - should support EVS and shall support EVS if super-wideband and full-band speech is supported. For video, WebRTC IMS client in 3GPP UE shall support H.264 CBP Level 1.2 and should support H.264 CBP Level 3.1 and HEVC (H.265). Since the reference to draft-ietf-rtcweb-overview excluding codec aspects is within TS 24.371, SA WG4 suggests specification of these recommendations in an attached draft CR to TS 24.371.","secretary_remarks":"","agenda_item_sort_order":28,"ainumber":"12.2","ainame":"(IMS_WebRTC) - Web Real Time Communication (WebRTC) Access to IMS","tdoc_agenda_sort_order":10440,"status":"noted","reservation_date":"2015-03-27 14:39:51","uploaded":"2015-03-27 15:58:34","revisionof":"","revisedto":"","release":"","crspec":"","crspecversion":"","workitem":"","crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"","lsto":"","Cc":"","lsoriginalls":"S4-150224","lsreply":"","link":"http:\/\/www.3gpp.org\/ftp\/tsg_sa\/TSG_SA\/TSGS_67\/Docs\/SP-150012.zip","group":"SP","meeting":"SP-67","year":2015,"uicc_affected":null,"me_affected":null,"ran_affected":null,"cn_affected":null,"clauses_affected":null,"crsinpack":null,"crsinpacknumber":0}]