Documentation for MDS/SequentialSummary

Technique SequentialSummaryExtractionTool
Document N3705 MPEG-7 CD MDS, see Sequential Summaries
Name Osamu Hori, Toshimitsu Kaneko, Koji Yamamoto (Toshiba R&D Center)
Email osamu.hori@toshiba.co.jp, toshimitsu.kaneko@toshiba.co.jp, koji7.yamamoto@toshiba.co.jp
Contact osamu.hori@toshiba.co.jp
Type Application
External Libraries ImageMagick library and mpeg2decode with extraction of motion vectors.
Related Ds/DSs SummaryDS, SequentialSummaryDS, FramePropertyD
Used Ds/DSs NONE
Input MPEG-Video (foo.mpg), MPEG frame information file (frameinfo.txt)
MPEG frame information file is a text file consist of three sections.
[VideoSkim] : File name of the video skim file.
[I-pictures] : Listing of the I-picture frames.
[P-pictures] : Listing of the P-picture frames.
[Regions] : Listing of the frames with region data.
The syntax for the region data is:
frame# imagefile left top width height
Extraction Yes
Client Appl NA
Summary This component generates a smart quick view, i.e., fast playback with automatic speed
control using thumbnail data and frame activity value. The thumbnail data is shrinked
I-picture frame images, given by a video skim (a composite of still-images). Frame
activity value is calculated from the motion vectors in the P-picture frames. The frame
numbers of I and P-pictures have to be described in the frame information file because
they are not extracted automaticaly. Region data is used to describe the region of interest.
Strong Points Regarding speed, it work best when the input mpeg video is not longer than 30 minutes.
Limitations Processing time can be very long when the input mpeg video is long.
Parameters NA