Video/audio signal processing method and video/audio signal processing apparatus
a signal processing and video/audio technology, applied in the field of video/audio signal processing method and video/audio signal processing apparatus, can solve the problems of time-consuming decoding of mpeg compressed bitstream, inability to detect camera zoom and rotation, and inability to directly apply camera motion estimation algorithms developed for the pel domain (as listed above)
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[0065] The embodiments according to the present invention will now be described with reference to the attached drawings.
[0066] A new compressed domain feature point selection and motion estimation algorithm with applications including camera motion estimation, object motion estimation, video summarization, video transcoding, motion activity measurement, video scene detection, and video keyframe detection is disclosed in the present invention.
[0067] Existing feature point selection methodologies for object identification, object tracking, global motion estimation, and video summarization are applied in the pel domain and require therefore time consuming decoding of the compressed video bitstream.
[0068] The disclosed feature point selection algorithm works directly in the compressed-domain and thus avoids computationally expensive and time consuming decoding of the compressed video stream. A compressed domain preselection mechanism to determine candidate feature-points reduces the ...
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