Appeal No. 1997-0650
Application 08/171,136
Representative claim 1 is reproduced below:
1. A method of determining scene changes in a sequence
of visual information-bearing frames, comprising the steps of:
(a) dividing a first digitized frame into a first
plurality of regions and a second digitized frame into a
second plurality that respectively correspond in location to
the first plurality of regions;
(b) block-matching the regions of the first digitized
frame to the regions of the second digitized frame to produce
regional match signals that represent a likelihood that the
regions of the first digitized frame contain visual
information substantially similar to respective matching
regions of the second digitized frame;
(c) ordering, to obtain an ordered sequence, the regional
match signals beginning with a best regional match signal
defining a best match and ending with a worst regional match
signal defining a worst match;
(d) averaging together a predetermined number of the
regional match signals that are selected in the ordered
sequence of step (c) beginning with the best match signal, to
obtain an instantaneous match (IM), said IM signal providing a
criteria for determining whether the first digitized frame
represents a scene different from a scene represented by the
second digitized frame; and
(e) indicating a scene change when the IM signal meets a
predetermined decision criterion.
The following references are relied on by the examiner:
Avis et al. (Avis) 5,027,205 June 25,
1991
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