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) 1 Lab Seminar Video Presence System with One VS Multi Supported Koh Choi 31, January, 2008

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

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

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

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”

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

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 – Channel selection about multiple input stream  Mpeg2 dec – mpeg2 transmission in vlc  Dvgrap – HDV Image capture and play in vlc 7

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

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

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