Multi View Video and its transmission
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Joined: Feb 2010
21-02-2010, 07:43 AM
Multi-View Video and its transmission presentation.ppt (Size: 2.84 MB / Downloads: 132)
Multi-View Video and its transmission
Â¢ A little history:
â€œ Motion pictures
â€œ T.V broadcast : live, digital.
â€œ DVD, BD, VOD etc
Â¢ Single View Video
â€œ Only one view
â€œ No interaction
Â¢ Multi-view=>Many views
Â¢ Multiple cameras focused on a single event
Â¢ Different view angles + effects=>IMV
Â¢ Used in product demos,ads,surgical instructions, sports etc
Â¢ E.g. 33 camera EyeView System used in SuperBowl 2001
Â¢ Camera, pan-tilt unit, control PC, synchronization unit.
Â¢ Spatial camera configuration
Â¢ Compression and encoding done using MVC.
Server and Client side
Â¢ Collects Ëœnâ„¢ compressed video streams
Â¢ Transfers users requests to control PC.
Â¢ Client receives and decodes MVV.
Â¢ Also facility to store and playback.
Â¢ View Switching
â€œ Switching from 1 camera to another
Â¢ View sweeping
â€œ Switching between adjacent view directions
â€œ Video still playing.
Â¢ Frozen moment
â€œ Time frozen
â€œ Camera rotated about a point
â€œ Real time implementation done in SuperBowl is shown
Â¢ Major Modules are:
â€œ System Calibration
â€œ Object tracking
â€œ Video capturing
â€œ Video delivery
â€œ Video viewer
Â¢ Consists of:
â€œ Geometrical calibration
â€œ Color normalization
Â¢ Geometrical calibration: arrangement of cameras.
Â¢ Color Normalization: smoothen illumination changes
Object tracking and Video capturing
Â¢ Tracking moving objects
Â¢ Camera assembly arranged as master slave.
Â¢ Collecting, assembling and protecting video signal.
Â¢ The 3 assumptions based on user study
Â¢ Concept of I frame
Â¢ Compression using I frame concept
Â¢ Streaming and Broadcasting modes
Â¢ As said earlier:2 streams
Â¢ Based on user study: for 90Ã‚Â° no: of views=6.
Â¢ Saved b/w used for special effects.
Â¢ More snapshots sent when interesting event occurs.
Â¢ Connects to server receives MVV-decodes it
Â¢ Supports playback of stored MVVâ„¢s
Â¢ User interaction facilitated through special function keys
Â¢ Viewing same event from multiple angles
Â¢ Bound to revolutionize every field from entertainment to education
Â¢ Microsoft-8 patents-NATAL
Â¢ MVC still to be approved by MPEG
Â¢ Multi-View Video
â€œ The future is here