Selective VS-MRF-ME and intra coding in H.264 based on spatiotemporal continuity of motion field / Liquan Shen in Signal processing. Image communication, Vol. 24 N° 5 (Mai 2009)  

Public ISBD [article]  inSignal processing. Image communication > Vol. 24 N° 5 (Mai 2009) . - pp. 405-414 Titre : Selective VS-MRF-ME and intra coding in H.264 based on spatiotemporal continuity of motion field Type de document : texte imprimé Auteurs : Liquan Shen, Auteur ; Zhi Liu, Auteur ; Zhaoyang Zhang, Auteur Article en page(s) : pp. 405-414 Note générale : Electronique Langues : Anglais (eng) Mots-clés : Video coding H.264 Motion continuity Variable size motion estimation Multiple-frame Intra Index. décimale : 621.382 Dispositifs électroniques utilisant les effets des corps solides. Dispositifs semi-conducteurs Résumé : The new video coding standard, H.264 uses variable size motion estimation (VS-ME), multiple reference frame motion estimation (MRF-ME) and spatial-based intra prediction with selectable block size in inter frame coding. These tools have achieved significant coding efficiency compared to coding a macroblock (MB) only based on motion-compensation in regular size with single reference frame. However, these new features also give rise to an exhaustive computation in the coding procedure since there are so many combinations of coding modes and reference frames to be tried. In this paper, a fast motion estimation algorithm based on the selective VS-MRF-ME and intra prediction is proposed to reduce H.264 coding computational complexity. The basic idea of the method is to utilize the spatiotemporal property of motion field in predicting where VS-MRF-ME and intra prediction are needed, and only in these regions VS-MRF-ME and intra coding are enabled. The motion field is generated by motion vectors from 16×16 motion estimation on the nearest reference frame. Simulation results show that the proposed algorithm can save 50% computational complexity on average, with negligible loss of coding efficiency. DEWEY : 361.382 ISSN : 0923-5965 En ligne : http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235640%23 [...] [article] Selective VS-MRF-ME and intra coding in H.264 based on spatiotemporal continuity of motion field [texte imprimé] / Liquan Shen, Auteur ; Zhi Liu, Auteur ; Zhaoyang Zhang, Auteur . - pp. 405-414. Electronique Langues : Anglais (eng) in Signal processing. Image communication > Vol. 24 N° 5 (Mai 2009) . - pp. 405-414 Mots-clés : Video coding H.264 Motion continuity Variable size motion estimation Multiple-frame Intra Index. décimale : 621.382 Dispositifs électroniques utilisant les effets des corps solides. Dispositifs semi-conducteurs Résumé : The new video coding standard, H.264 uses variable size motion estimation (VS-ME), multiple reference frame motion estimation (MRF-ME) and spatial-based intra prediction with selectable block size in inter frame coding. These tools have achieved significant coding efficiency compared to coding a macroblock (MB) only based on motion-compensation in regular size with single reference frame. However, these new features also give rise to an exhaustive computation in the coding procedure since there are so many combinations of coding modes and reference frames to be tried. In this paper, a fast motion estimation algorithm based on the selective VS-MRF-ME and intra prediction is proposed to reduce H.264 coding computational complexity. The basic idea of the method is to utilize the spatiotemporal property of motion field in predicting where VS-MRF-ME and intra prediction are needed, and only in these regions VS-MRF-ME and intra coding are enabled. The motion field is generated by motion vectors from 16×16 motion estimation on the nearest reference frame. Simulation results show that the proposed algorithm can save 50% computational complexity on average, with negligible loss of coding efficiency. DEWEY : 361.382 ISSN : 0923-5965 En ligne : http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235640%23 [...]

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