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Hypervideo

Hypervideo. Group Name: Adept. Group Members. Vinay Kalasannavar Content authoring, presentation Code samples Sagar Sahay Strategy authoring Poorna Chandra Suraj Labelling and weights MOT/LAG Workflow. Introduction. Hypervideo = "hyper linked video“

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Hypervideo

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  1. Hypervideo Group Name: Adept

  2. Group Members • Vinay Kalasannavar • Content authoring, presentation • Code samples • Sagar Sahay • Strategy authoring • Poorna Chandra Suraj • Labelling and weights • MOT/LAG Workflow

  3. Introduction • Hypervideo = "hyper linked video“ • Video stream that contains embedded, user click-able anchors • Allowing navigation between video and other hypermedia elements

  4. Introduction

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  7. Introduction

  8. Introduction… • HV = video + a non linear information structure • Allowing user to make choices • content of the video and the user's interests • Analogous to hypertext: • "Element of time“ • Text is normally static, video is dynamic • Hypervideo has different technical, aesthetic, and rhetorical requirements • A link from an object in a video, that is visible for only a certain duration

  9. Motivation • Wider availability of broadband - has increased the linking video capabilities • Digital libraries - video is an important part. • Vast video archives: could be useful in education and historical research.

  10. Motivation for us • VideoClix • http://www.videoclix.tv/#vcx_pjsb7d234081 • Hypervideo and Silverlight: • "a video that contains embedded links that allow navigation between video and other media elements" • http://www.silverlight.net/learn/videos/silverlight-videos/hypervideo-part-1/

  11. How it works • Segment the video appropriately • Add the metadata required to link from frames (or even objects) • To logically relevant information in other media forms

  12. Concepts and Technical Challenges • Hypervideo is challenging: separating video into linkable content. • Video = sequence of images • To segment a video into meaningful pieces (objects/scenes) • It is necessary to provide a context, both - in space and time • Manual segmentation difficult: • For .E.g.: • A short video at the rate of 30 frames per second • 30 seconds = 900 frames

  13. Challenges cntd.. • The smallest linkable unit of a video • a single frame: easy, but cannot contain video info • a scene (minimum sequential set of frames that conveys meaning) • algorithms need capability of detecting scene transitions • Time introduces complexity: • Assuming frame is the smallest time unit, • Separating the frame image into its constituent objects - segmentation at the object level. • Follow the same object through a sequence of frames (object tracking)

  14. Concepts cntd.. • After nodes are segmented and combined with the associated linking information. • This metadata must be incorporated with the original video for playback. • The metadata is placed conceptually in layers, or tracks, on top of the video. • This layered structure is then presented to the user for viewing and interaction.

  15. Concepts cntd.. • Three components: • One or more videos • Markers embedded into the video • invisible to the user • but perceived by the player • The hypervideo player • The display technology, used to play the hypervideo content.

  16. Hypervideo authoring tools • Authoring = The process of creating hypervideo content • Examples: • VideoClix: • A commercially available technology plays on players like QuickTime and Flash • Adobe Flash: • Flash was not designed hypervideo authoring tool - can be difficult using Flash alone • Added functionality through outside software - for e.g.: MoVideo and Digital Lava • Asterpix: • offers a hypervideo service and browser. • Users can convert internet videos sites (such as YouTube) on the fly • viewers may interact and navigate the hypervideo without the need for any special software. • Silverlight.

  17. Hypervideo authoring tools • In Silverlight: • A word appears on the screen and when you click on it, the first video pauses and a second video begins detailing your retirement plan options. • You click on the question mark... • You click on the glowing question help button…

  18. Related research • US Patent 6462754 (October 8, 2002) • Method and apparatus for authoring and linking video documents (http://www.patentstorm.us/patents/6462754.html) • Combining Spatial and Navigational Structure in the Hyper-Hitchcock Hypervideo Editor • (http://www.fxpal.com/publications/FXPAL-PR-03-250.pdf) • HyLive: Hypervideo-Authoring for Live Television 2008 • (http://www.springerlink.com/content/r46415461n050585/)

  19. Hypervideo Applications. • Education • Computer-Based Training • Research and Development • Entertainment • Youtube • Marketing

  20. Possible areas for future research • Aesthetic and rhetoric properties of hypervideo • Development of standards • Automatic generation of hypervideo • Computer-Based Training

  21. Thank you. • Questions?

  22. References • http://en.wikipedia.org/wiki/Hypervideo#cite_note-13 • http://www.csdl.tamu.edu/~l0f0954/academic/cpsc610/p-1.htm • http://silverlight.net/learn/tutorials/hypervideo-cs/

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