Slide title minimum 48 pt Slide subtitle minimum 30 pt WEB REAL-TIME Communication Use-cases &...

WEB REAL-TIME Communication

Use-cases & Requirements

draft-holmberg-rtcweb-ucreqs

Christer HolmbergStefan HåkanssonGöran AP Eriksson

Slide title minimum 32 pt

(32 pt makes 2 rows

Text and bullet level 1 minimum 24 pt

Bullets level 2-5minimum 20 pt

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draft-holmberg-rtcweb-ucreqs | 2011-03-27 |

PURPOSE of the draft

› DEFINE USE-CASES

› DERIVE REQUIREMENTS, BASED ON THE USE-CASES


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SCOPE of the draft

› CURRENT FOCUS: – Real-Time Media Streams requirements– Audio and video– Browser/web-app functional separation› Browser requirements› Browser/Web-app API requirements

› CURRENTLY NOT COVERED:– Privacy requirements– Web server/browser signalling– Datagram traffic


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scope OF THE DRAFT

NAT/FW

WEB BROWSER

WEB SERVER

WEB APP (JS)

API/BROWSER API

SERVER/BROWSER SIGNALLING

RTP


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USE-CASE: Simple Video Communication Service

› Users have loaded, and logged into, a video communication web application into their browsers, provided by the same service provider.

› Web service publishes information about user login status, by pushing updates to the web application in the browsers.

› By selecting an online peer user, a 1-1 video communication session between the browsers of the peers is initiated.

› Self-view, remote video, display size, mute/pause.


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USE-CASE: Multiparty video communication

› Simple video communication service (see previous slide) is extended by allowing multiparty sessions.

› No central server.› Web application pans the audio from different participants

differently when rendering the audio.› Users can change how the different participants are placed

in the (virtual) room.› Each video stream received is by default displayed in a

thumbnail frame within the browser,


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USE-CASE: Multiparty on-line game with voice communication

› Voice part of the multiparty video communication application is used in the context of an on-line game.

› Received voice and audio media rendered together with game sound objects (possibly from different source than voice and audio).


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USE-CASE: Video conferencing system with central server

› System supporting establishment of multiparty video sessions using a central conference server.

› Participants send an audio stream to central server.› Central server mixes the audio streams and sends towards participants

a mixed stereo stream.› Participants send two video streams towards server, one low resolution

and one high resolution, to be displayed in main window resp thumbnail.

› Server selects what video streams to be forwarded as main- and thumbnail videos, based on speech activity.

› Users can not can establish a Virtual Private Network (VPN) to access service, if not physically connected to the network where service is located.


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USE-CASE: Hockey game viewer

› Ice-hockey club uses application that enables talent scouts to, in real-time, show and discuss games and players with the club manager.

› Talent scouts use mobile phone with two cameras, one front-facing and one rear facing.

› Club manager uses a desktop for viewing the game and discussing with the talent scout.

› Desktop screen covered with video captured by front facing camera of mobile phone, with overlaid thumbnail with video captured by rear facing camera.

› Mobile phone screen covered by a self view of the front facing camera, with overlaid thumbnail rear facing cameras view.


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USE-CASE: Telephony terminal

› Mobile telephony operator allows customers to use web browser to access operator services.

› Web user can place and receive calls in the same way as when using a normal mobile phone.

› When call is received or placed, identity of remote user will be shown in the same manner as when a mobile phone used.


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BROWSER REQS IN A NUTSHELL

› ACCESS TO MEDIA INPUT DEVICES– Camera, microphone,…

› MEDIA STREAM DETECTION, PROCESSING & TRANSMITING

› MEDIA STREAM QUALITY– Rate, jitter, packet loss, echo control

› AUDIO/VIDEO SYNCHRONIZATION› MIXING OF STREAMS FROM DIFFERENT SOURCES› CODECS› NAT/FW TRAVERSAL SUPPORT FOR MEDIA STREAMS› LEGACY INTEROPERABILITY


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API REQS IN a NUTSHELL

› USE & CONTROL BROWSER FUNCTIONS–Start/stop sending/receiving of media streams–Mute/pause media streams–Stream layout–Media format (codec)

› BROWSER EVENTS–Status of media stream–Media streams no more received

› QUERY BROWSER FUNCTIONS (input devices, stream capabilities, codecs…)


(32 pt makes 2 rows









THANK YOU FOR LISTENING!

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Slide title minimum 48 pt Slide subtitle minimum 30 pt WEB REAL-TIME Communication Use-cases &...

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