15 Immersive Teleconferencing and Telepresence for Remote Terminals (ITT4RT)

26.2233GPPMedia handling and interactionRelease 18Telepresence using the IP Multimedia Subsystem (IMS)TS

A TP-UE may support ITT4RT functionality as defined in TS 26.114 [2], Annex Y. A TP-UE may be an ITT4RT-Tx client or an ITT4RT-Rx client. A TP-UE that is an ITT4RT-Tx client is capable of providing at least one immersive 360-degree video. A TP-UE that is an ITT4RT-Rx client is capable of receiving exactly one immersive 360-degree video.

Media requirements for ITT4RT clients as specified in TS 26.114 [2], clause Y.3 on Immersive 360-degree video, Clause Y.4 on Immersive Audio/Voice support, and clause Y.5 on Overlay support, also apply to TP UEs supporting ITT4RT functionality.

The media configuration requirements for the main 360-degree video for ITT4RT clients specified in TS 26.114 [2], clause Y.6.2, also apply for TP UEs that support ITT4RT functionality.

The media configuration requirements for the still background for ITT4RT clients specified in TS 26.114 [2], clause Y.6.3, also apply for TP UEs that support ITT4RT functionality.

The media configuration requirements for overlays for ITT4RT clients specified in TS 26.114 [2], clause Y.6.4.1, Y.6.4.2 and Y.6.4.3, also apply for TP UEs that support ITT4RT functionality.

The media configuration requirements for fisheye video for ITT4RT clients specified in TS 26.114 [2], clause Y.6.5, also apply for TP UEs that support ITT4RT functionality.

The media transport requirements for ITT4RT clients specified in TS 26.114 [2], clause Y.7, also apply for TP UEs that support ITT4RT functionality.If the TP UE supporting ITT4RT functionality intends to negotiate at least one 360-degree video and at least one overlay, the SDP offer from the TP UE shall contain all of them in the basic (i.e., non-CLUE controlled) stream offered with the capabilities for ITT4RT clients using the itt4rt_group attribute as specified in clauses Y.6.2.6 and Y.6.8 of 3GPP TS 26.114 [2]. If the initial SDP offer-answer is successful, the CLUE ADVERTISEMENT message should contain the list of global views ( <globalViews>) containing a global view as specified in [11] for each rest-group.

Annex A (informative):
SDP and CLUE Examples