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Given by Marek Podgorny at Visit by CEWES Team on Mar 25 1997. Foils prepared Mar 24 97
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Summary of Material
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Multimedia Support for Education and Collaboration
Multimedia Subsystems
Multimedia subsystems
Videoconferencing System
Conferencing System Architecture
Audio Tool
Video Tool
VTC Integration with TANGO
Geographical Information Systems
Geographical Information Systems
TIGER/Line Datasets
TIGER/Line Data Definition
TIGER/Line Data
GIS: Weather Overlays
Weather Visualization System
Video services in TANGO
Video services in TANGO
Outside Index
Summary of Material
HTML version of Basic Foils prepared Mar 24 97 
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| Marek Podgorny |
| NPAC, Syracuse University |
HTML version of Basic Foils prepared Mar 24 97
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Videoconferencing system
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Video on Demand system
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Geographical Information System
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HTML version of Basic Foils prepared Mar 24 97
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| All multimedia subsystems have been developed in NPAC from scratch during last 2 years |
| All subsystems are being integrated with TANGO collaborative environment |
| As for TANGO, multiplatform interoperability is high priority |
| Many subsystems immediately deployable |
HTML version of Basic Foils prepared Mar 24 97
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Architecture akin to OpenDVE/LiveMedia
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| multiplatform (UNIX, Windows 95/NT) |
| supports multiple codecs (audio and video) |
multimedia archiving system (early implementation)
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HTML version of Basic Foils prepared Mar 24 97 
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| Conference engine |
| Conference engine |
| Conference engine |
| Directory Server |
| Plugins |
| Conference |
| manager |
| daemon |
| daemon |
| Conference manager |
| Plugins |
| Conference engine |
| Callee site |
| Conference manager |
| Plugins |
| Conference engine |
| control flow |
| data flow |
| control & data flows |
| TCP/IP |
| TCP/IP |
| UDP |
| UDP |
| UDP |
| Caller site |
HTML version of Basic Foils prepared Mar 24 97
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| Audio Tool features: |
| Uses two types of compression: GSM 06.10 speech codec and Intel/DVI ADPCM codec |
| GSM codec offers better compression ratio but worse speech quality - it is good for less reliable networks |
| ADPCM compresses audio just four times but it has much better quality |
| Support for multicast |
| Support for half-duplex sound cards |
| GSM 06.10 codec |
| Standard used in digital cellular telephony |
| Based on the RPE-LTP compression algorithm |
| Modem bitrates |
| Intel/DVI ADPCM codec |
| Less computionally intensive than G.721 |
| Produces very good quality for voice signals and reasonably good quality for music |
| Bitrate: ~32 kpbs |
HTML version of Basic Foils prepared Mar 24 97
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| Video tool features: |
| uses two types of compression - H.261 and H.263 |
| YUV9 version for LANs in development |
| Variable codecs support adaptability |
| Supports multicast |
| Implements RTP |
| Video formats: QCIF, CIF |
| H.263 vs. H.261 |
| The same quality with 30-50% of bits usage |
| Performance: ~5 fps for H.263, 7-9 fps for H.261, 15 fps for YUV9 for QCIF |
| Bitrates: 20-50 kbps for H.263, up to 128 kps for H.261, up to 0.5 Mpbs for YUV9 |
HTML version of Basic Foils prepared Mar 24 97
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For scaleability reasons, the real time multimedia streams are not sent via central server.
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GIS systems with 2D and 3D visualization
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Focus: high-end terrain visualization with GIS overlays, integrated with Web
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| Collaboratory support via TANGO for both Java and OpenInventor viewers |
| VRML 2/TANGO integration in progress |
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Adaptive application: for slow networks
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| Implementing access to rich GIS public domain databases: TIGER/Line data |
| Terrain data: high resolution color satellite images |
| Support for stereographic viewing |
| Support for 2D and 3D current weather overlays |
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| Topographically Integrated Geographic Encoding and Referencing (TIGER) is the system developed by the U.S. Census bureau for mapping purposes |
| TIGER/Line files are extracts of selected geographic and cartographic information from the TIGER database. |
| TIGER/Line coverage is available for the entire United States of America. |
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Line features
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Landmark features
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Polygon features
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| Public domain data loaded into Illustra database along with census data |
| Illustra supports 2D and 3D spatial queries |
| 2D and 3D viewers will support dynamically built overlays constructed on demand from the TIGER/Line and census data |
| Graphical interface for spatial queries being designed |
HTML version of Basic Foils prepared Mar 24 97
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Weather reporting and visualization system
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HTML version of Basic Foils prepared Mar 24 97
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| Java interactive weather |
| browser |
| LDM |
| unidata |
| server |
| NWS |
| Supercomputers |
| ARPS |
| Java |
| operations |
| server |
| Java interactive |
| Weather Browser |
HTML version of Basic Foils prepared Mar 24 97
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HTML version of Basic Foils prepared Mar 24 97
Full HTML Index
Access to a searchable digital video repository
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Collaborative access under TANGO session control
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