DEPT. OF INFO. & COMM., GISTNetworked Media Lab.

Networked Media LaboratoryDept. of Information & Communications

Gwang-Ju Institute of Science & Technology (GIST)

http://netmedia.gist.ac.kr

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Lab SeminarVideo Presence System with One VS Multi

Supported

Koh Choi31, January, 2008

DEPT. OF INFO. & COMM., GISTNetworked Media Lab.

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Contents

Introduction & Background

Related Work

Motivation

Proposed Approach

Conclusion

Schedule

DEPT. OF INFO. & COMM., GISTNetworked Media Lab.

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Introduction & Background

Video Presence(VP) System

Concept of presence Psychological sense of "being there" in environment based on technologically

founded immersive bas Three types of presence

Personal presence The extent to which a person feels part of the environment

Social presence The extent to which others (human and non- human ) exist in the environment

Environmental presence The extent to which the environment acknowledges and interacts with the participants

DEPT. OF INFO. & COMM., GISTNetworked Media Lab.

Introduction & Background(cont)

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Prototype VP system Video Presence

Provide sense of presence by sharing multiple high-quality media Objective

Develop a system and software for video presence Prototype VP system

Smeet space

Smart Meeting Room

Linux

VLC

HD Camera

HD Camera

HD Camera

Network

Sender

Receiver

Tiled Display

Linux

VLC

VLC SVC

SVC

SVC

IEEE 1394 network

Network

DEPT. OF INFO. & COMM., GISTNetworked Media Lab.

Related Work

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Cisco Telepresence

In-person experiences between individuals, businesses, and events.

People everywhere can work, live, play, and learn together, in person –

over the network.

Others

HP “hallo”, Polycom “RPX”, Tandberg “Experia”

DEPT. OF INFO. & COMM., GISTNetworked Media Lab.

Motivation

Many users want to present reality

Immersive Collaboration Meeting

Supporting reality meeting environment

Using concept of presence

World issue and market

Many companys concentrate on this field

Market is a wide scope.

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DEPT. OF INFO. & COMM., GISTNetworked Media Lab.

Proposed Approch

Understand library in VLC Using by library : libraw1394, libiec 61883, mpeg2 dec, dvgrap libraw 1394 – Ieee 1394 network acquisition in Linux Libiec 61883 – Channel selection about multiple input stream Mpeg2 dec – mpeg2 transmission in vlc Dvgrap – HDV Image capture and play in vlc

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Lib1394 lib.Capture

ieee1394 network

Dvgrab Capture Image

In VLCHD Video Image

Libiec 61883Report Image And Channel

selection

IEEE 1394 network

Channel 63

Channel 63

Channel 63

Channel 63

DEPT. OF INFO. & COMM., GISTNetworked Media Lab.

Conclusion

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Success chapter 1 : VP system Two Jvc camera transmission in Tiled display Similar multi view Using by VLC and SVC

Problem Frame rate very low (CPU limit) A little delay existence but there is no large difference

Future work Overcome low frame rate

A cause analysis about frame rate Using Two machine or more…

Eliminating delays

Study vlc system and mpeg2 transmission system

Source coding analisis of VLC

Find synchronization method

DEPT. OF INFO. & COMM., GISTNetworked Media Lab.

Schedule

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1 2 3 4 5 6 7

MPEG2 Transmission

System seminar

MPEG2 Transmission

System analysis

Low frame rateanalysis

Image differenceanalysis

VP system(Three camera)

VLC systemAnd source coding

analysis

VP systemaccomplishment

(1/31)

(2/28)

(2/28)

(2/11)

(7/31)

(4/30)

DEPT. OF INFO. & COMM., GISTNetworked Media Lab.

End of my seminar. Thank you

Any question or comment

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