collaboration and education group anoop guptajonathan grudin david bargeronsteven white liwei heyong...
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Collaboration and Education Group
Anoop Gupta Jonathan Grudin
David Bargeron Steven White
Liwei He Yong Rui
Collaboration and Education Group
Formed about 12 months ago
Mission: To explore novel technologies and applications that
enhance collaboration and education / training
Current work focuses on streaming media
Research model
Evaluation: Laboratory and Field Studies
BuildPrototype
Evaluation /Publication
RefinePrototype
ProductImpact
Focus on Communication
Effective access/use of information is key to a modern corporation (Digital Nervous System)
Much of this communication can be considered presentations, formal or informal slides and documents capture only a small part low-cost capture and on-demand availability
Relevant participants are often not collocated must create sense of presence and awareness provide interactivity across time and place
Three Issues that Frame Our Research
There are too many presentations to attend ability to time-compress talks ability to summarize talks indexes for quick search/access
Knowledge-creation does not end when the talk ends facilitating “in-context” asynchronous discussion
Talks redesigned for online and asynchronous access social implications changes in organization and presentation of talks
ProductionCost
End-UserValue
Time
Ongoing Projects
MSTE and MURL: Online Seminars
Time Compression and Skimming
MRAS: Multimedia Annotations
Flatland: Telepresentation System
MSTE Online Presentations
Logs of ~10K sessions involving over 2K users
Some results: On-demand audience about 40% of live audience 60% < 5 minutes Viewers jump around video Initial portions much more likely to be watched
Presentations will be designed differently in future Present key messages early in talk Present key messages early in slide Use meaningful slide titles Reveal talk structure in slide titles Consider post-processing talk for on-line viewers
Analysis of Online Presentation Viewing
Logs of ~10K sessions involving over 2K users
Some results: On-demand audience about 40% of live audience 60% < 5 minutes Viewers jump around video Initial portions much more likely to be watched
Presentations will be designed differently in future Present key messages early in talk Present key messages early in slide Use meaningful slide titles Reveal talk structure in slide titles Consider post-processing talk for on-line viewers
Time Compression: Synchronized Audio and Video
To preserve pitch: throw away portion of each 100ms chunk, then stitch together
Basic signal processing well known, but several systems issues
Results of lab studies: People choose ~1.4 speed, don’t adjust much They like it
“I think it will become a necessity… Once people have experienced it they will never want to go back. Makes viewing long videos much, much easier.”
Comprehension may go up
Skimming: Compression Goes Nonlinear
To beat 2x speedup, must throw away content
Sources of information audio: pauses, intonation, speech-to-text and NLP video: scene changes other: slide-changes, previous viewers’ patterns
Lab studies of 4x-5x speedup Viewers learn from automatic summaries Viewers like and learn more when author-edited
Mixed-initiative summarization is promising
Ongoing Projects
MSTE and MURL: Online Seminars
Time Compression and Skimming
MRAS: Multimedia Annotations
Flatland: Telepresentation System
Initial Lab Studies of Annotated Video
Personal note-taking (MRAS vs. Paper) ~1 note / minute in each condition positioning: none in paper; ~10-15s later in MRAS all subjects preferred MRAS (although more time),
and thought more useful for future reference
Shared notes study text preferred to audio 14/18 stated more participation than in “live” class auto-tracking particularly useful
Annotation: Field Studies & Future Work
MSTE class to use MRAS and recorded lectures Can we emulate live-classroom discussion in an
asynchronous environment using MRAS? Will people interact/learn more using MRAS rather than in
“live” classroom environments? How can we stimulate discussion / community formation
in asynchronous environments?
MS Usability Engineers: “highlights tapes” Video is now organized by annotations Email distribution, playlists become key features Possible wider use in development
Unified annotation platform architecture storage, naming, sharing, user interface
Flatland Telepresentation System
Joint project with the Virtual Worlds Group Flexible architecture for rapidly prototyping
distributed collaborative applications
Flatland
Flatland Telepresentation System
Joint project with the Virtual Worlds Group Flexible architecture for rapidly prototyping distributed
collaborative applications
Initial use in 3 multi-session MSTE classes Presentations from desktop to remote audience
Students: Liked the convenience Liked ability to multitask Did not think learning suffered
Instructors: Missed familiar sources of feedback Comfort level rose over time for 2 of 3
Overall: Lack of awareness of others a key problem
Telepresence: Issues Being Explored
Can capture and replay telepresentations: Opportunity to integrate compression, annotation
Examining mixed live/remote audience designs
Enhancing sense of presence and awareness Merging real-time and asynchronous information