Fast segmentation of H.264/AVC bitstreams for on-demand video summarization

Authors:
Klaus Schöffmann;Laszlo Böszörmenyi
Affiliations:
Department of Information Technology, ITEC, University of Klagenfurt, Klagenfurt, Austria;Department of Information Technology, ITEC, University of Klagenfurt, Klagenfurt, Austria
Venue:
MMM'08 Proceedings of the 14th international conference on Advances in multimedia modeling
Year:
2008

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Abstract

Video summarization methods need fast segmentation of a video into smaller units as a first step, especially if used in an on-demand fashion. We propose an efficient segmentation algorithm for H.264/AVC bitstreams that is able to segment a video in appr. 10% of the time required to decode the video. This is possible because our approach uses features available after entropy-decoding (which is the very first stage of the decoding process) only. More precisely, we use a combination of two features, especially appropriate to H.264/AVC, with different characteristics in order to decide if a new segment starts or not: (1) L1-Distance based partition histograms and (2) ratio of intra-coded macroblocks on a per-frame basis. Our results show that this approach performs well and works for several different encoders used in practice today.