Browse Prior Art Database

User Guided Selection or Elimination of Identified Information in Video Sequence

IP.com Disclosure Number: IPCOM000118021D
Original Publication Date: 1996-Aug-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 6 page(s) / 453K

Publishing Venue

IBM

Related People

Barber, R: AUTHOR [+2]

Abstract

Disclosed is a method to inhibit or monitor selected video sequence from a video stream. When coupled with a video tape recorder or television, the invention would allow a user to execute a user defined action during a preselected and recognized video sequence, such as inhibiting the recording of the video sequence, automatically switching the receiver to an alternate channel, switching audio to radio/tape/Compact Disk (CD) or muting audio. The invention also allows regulatory agencies and advertisement agencies to monitor the number and content of advertisements in video broadcasts. It has applications to multimedia as an information filter.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 20% of the total text.

User Guided Selection or Elimination of Identified Information in
Video Sequence

      Disclosed is a method to inhibit or monitor selected video
sequence from a video stream.  When coupled with a video tape
recorder or television, the invention would allow a user to execute a
user defined  action during a preselected and recognized video
sequence, such as inhibiting the recording of the video sequence,
automatically switching the receiver to an alternate channel,
switching audio to radio/tape/Compact Disk (CD) or muting audio.  The
invention also allows  regulatory agencies and advertisement agencies
to monitor the number and  content of advertisements in video
broadcasts.  It has applications to  multimedia as an information
filter.

      As modern day society is flooded with information, it becomes
more and more important to filter out needed information from
unwanted or redundant information.  This invention describes a method
that allows  users to interactively identify unwanted or repetitive
material, enabling  a video tape recorder to bypass future
occurrences of this message. The  invention could be used for
inhibiting or monitoring other programming  material allowing, for
example, parents to block unwanted program material from children, or
sellers to verify their commercials actually  were broadcast.

      Currently, devices to eliminate unwanted video sequences have
been largely unsuccessful.  The prior patent art in the area consists
of the patents (1) and (2).  Both of these patents rely on detecting
fade breaks in video sequences and a fixed time delay.  Since fade
breaks occur in broadcast movies, the user has insufficient control
of what is deleted and what is retained.  This invention describes a
method to avoid these inherent problems in the prior art.  The
invention uses the following assumptions.  First, unwanted clips or
clips to be monitored are repeated.  Secondly, only a human can
determine what is unwanted and what is wanted.

A system for eliminating or monitoring selected video sequences is
now described.

      Given an analog or digital video signal, first compute when
major changes occur between successive frames in the video.  Several
reasonable methods are given as examples.  The first method involves
looking at the spatial and/or motion prediction information used the
Moving Pictures Experts Group (MPEG) compression scheme.  When the
prediction is very poor, mark it as a scene change.  Another method
is to look at signal levels between successive frames and mark scene
changes when large changes occur.  Finally, the method proposed in
other patents is to mark periods when the video and audio level fade,
go below a preset threshold, as scene change.  The primary reason for
the scene change detector is to reduce the processing bandwidth
requirements needed.  It is possible, but much more costly, to
process every frame.

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