Subject: [avtext] New Liaison Statement, "LS to IETF AVTEXT on Video Region-of-Interest (ROI)"

From: Liaison Statement Management Tool <[email-masked]>
Date: Mon, 16 Nov 2015 07:37:38 -0800

Title: LS to IETF AVTEXT on Video Region-of-Interest (ROI)
Submission Date: 2015-11-16
URL of the IETF Web page: https://datatracker.ietf.org/liaison/1440/

From:  (Ozgur Oyman <[email-masked]>)
To:  (Keith Drage <[email-masked]>, Jonathan Lennox <[email-masked]>)
Cc: 
Response Contacts: [email-masked],[email-masked]
Technical Contacts: 
Purpose: For information

Body: 1. Overall Description:
In an earlier liaison statement, 3GPP SA4 informed IETF AVTEXT regarding the Video Region-of-Interest (ROI) signaling framework adopted in 3GPP TS 26.114. Since then, we have recently updated the ROI specification in TS 26.114 with the following:

•Clarification of the requirements on ‘Sent ROI’ signaling mandating its offer when ‘Arbitrary ROI’ and/or ‘Pre-defined ROI’ are negotiated, and recommendation of its offer when ‘FECC’ is negotiated. 

•Definition of separate URNs for RTP header extensions corresponding to arbitrary ROI and predefined ROI signaling for the ‘Sent ROI’ mode. 

•Clarification of the SDP offer-answer procedures for the ‘a=predefined_ROI’ parameter. 

•Description of guidelines on the handling of concurrent ROI requests, e.g., during multi-party conferences

•Clarification of the definition of ROI information parameters and ROI usage in transcoding scenarios. 

•Inclusion of SDP examples demonstrating the offer-answer procedures for FECC, ‘Arbitrary ROI’, ‘Pre-defined ROI’ and ‘Sent ROI’ 

The latest version of 3GPP TS 26.114 v13.1.0 containing these updates can be found in the attached.

2. Actions:
To IETF AVTEXT:
3GPP SA4 kindly requests IETF AVTEXT to take the information above into account, and maintain coordination with SA4 during the course of the development of draft-huang-avtext-feedback-image-control-00 toward ensuring the alignment between 3GPP and IETF specifications.

3. Date of Upcoming TSG-SA WG4 Meetings:
TSG SA WG4 Meeting #87	25 - 29 Jan 2016	Venue: Sophia Antipolis, France
TSG SA WG4 Meeting #88	18 - 22 Apr 2016		Venue: USA

Attachments:

    S4-151302
    https://www.ietf.org/lib/dt/documents/LIAISON/liaison-2015-11-16-3gpp-tsgsa-sa4-avtext-ls-to-ietf-avtext-on-video-region-of-interest-roi-attachment-1.zip