sip-based intelligent multimedia conferencing

8/13/2019 SIP-Based Intelligent Multimedia Conferencing

http://slidepdf.com/reader/full/sip-based-intelligent-multimedia-conferencing 1/21



Agenda

• Introduction and Motivation

• SIP standard and advantages

• H.32x standard

• Basic Real Time Transport Protocol

• Formulation Plan and Methodology

• Implementation

• Future Work

2



Introduction

Conferencing has been on the research agenda for

many years and is rapidly gaining interest in the field of

communication.

It is advantageous to people who don’t want to spend

their time and money flying all over the world for face-

to-face meetings.

International standardization bodies have definedprotocols for multimedia conferencing. The

International Telecommunication Union (ITU) has made

H.32x standard.

3



Motivation

4



Session Initiation Protocol (SIP)

SIP: A proposed solution by Internet Engineering Task

Force (IETF)

SIP is an application-layer signaling protocol for

creating, modifying and terminating sessions with one

or more participants.

Can be used for voice, video, instant messaging,

gaming, etc.

Lightweight, flexible and extensible and moreover

scalable.

5



H.32x Standard

Handling conferencing data packets

Different platform desktops

ITU developed H.32x series, to facilitate the compatibility:

• H.322 (guaranteed bandwidth)

• H.323 (non-guaranteed bandwidth)

• H.324 (Applications over PSTN and mobile phones)

7



H.32x vs. SIP

On comparing H.32x and SIP protocols, it is found that

H.32x is widely deployed and more mature only

because of its early adoption by the market

But H.32x has several problems, including scalabilityissues.

On the contrary, SIP is more lightweight, flexible and

extensible. It is a text-based protocol which can easilyinteract with other internet protocols.

8



Real Time Transport Protocol

RTP is a transport protocol for real-time applications. Itis used for the transport of real-time data, including

audio and video.

RTP provides support for applications with real-timeproperties such as continuous media (e.g., audio and

video), including loss detection, security and content

identification.

RTP does not guarantee quality-of-service for real time

services.

9



Architecture

10



Formulation Plan

Package multimedia data into RTP packets.

Focus: It is a SIP user agent responsible for the

management of the conference using SIP signaling

protocol.

The focus can also act as a notifier, accepting

subscriptions to the conference, and notifying

subscribers about changes to the conference state.

A mixer is responsible for handling the multimedia

streams, and generating output streams which can be

distributed to participants. 11



Procedure

After capturing the packets at the server, the same will besent to the client site.

As soon as streams arrive at client site, a player will be

created so as to play the RTP streams for video data.

A transmitting module will be developed at the server site

to transmit the data. A receiving module will be developed

at the client site which will receive the data streams.

Finally, the modules will be tested and integrated to

implement conferencing.

12



Tasks to be performed

An interface would be developed for capturing the video

packets from a webcam and displaying the same on theterminal for a single user.

The above implementation would be modified to capture

video packets and transfer the same across multiple usersthus developing a conferencing system.

After the core implementation of conferencing system is

complete, an attempt would be made to add miningstructures that will give detailed information about the

user, what kind of conferencing he/she does and with

which user he/she interacts most of the time.

13



Screenshots of implemented chat system

14



15



16



17



18



19



Future Work

On successful completion of the proposed intelligentsystem, efforts will be made to design the conferencing

system for distributed architecture that will support

large number of heterogeneous networks and devices.

An effort will also be made to implement the same

mining structures in distributed system too.

20



21

sip-based intelligent multimedia conferencing

Documents