1. D EPT. OF I NFO. & C OMM., GIST Networked Media Lab. Networked Media Laboratory Dept. of Information & Communications Gwang-Ju Institute of Science & Technology (GIST) http://netmedia.gist.ac.kr 1 Lab Seminar Video Presence System with One VS Multi Supported Koh Choi 31, January, 2008

2. D EPT. OF I NFO. & C OMM., GIST Networked Media Lab. 2 Contents  Introduction & Background  Related Work  Motivation  Proposed Approach  Conclusion  Schedule

3. D EPT. OF I NFO. & C OMM., GIST Networked Media Lab. 3 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

4. D EPT. OF I NFO. & C OMM., GIST Networked Media Lab. Introduction & Background(cont) 4  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

5. D EPT. OF I NFO. & C OMM., GIST Networked Media Lab. Related Work 5  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”

6. D EPT. OF I NFO. & C OMM., GIST Networked 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. 6

7. D EPT. OF I NFO. & C OMM., GIST Networked 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 7

8. D EPT. OF I NFO. & C OMM., GIST Networked Media Lab. Conclusion 8  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

9. D EPT. OF I NFO. & C OMM., GIST Networked Media Lab. Schedule 9 1234567 MPEG2 Transmission System seminar MPEG2 Transmission System analysis Low frame rate analysis Image difference analysis VP system (Three camera) VLC system And source coding analysis VP system accomplishment (1/31) (2/28) (2/11) (7/31) (4/30)

10. D EPT. OF I NFO. & C OMM., GIST Networked Media Lab. End of my seminar. Thank you Any question or comment 10