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Détail de l'auteur
Auteur Sanjit K. Mitra
Documents disponibles écrits par cet auteur
Affiner la rechercheFast motion estimation for H.264 / Canhui Cai in Signal processing. Image communication, Vol. 24 N° 8 (Septembre 2009)
[article]
in Signal processing. Image communication > Vol. 24 N° 8 (Septembre 2009) . - pp. 630-636
Titre : Fast motion estimation for H.264 Type de document : texte imprimé Auteurs : Canhui Cai, Auteur ; Huanqiang Zeng, Auteur ; Sanjit K. Mitra, Auteur Article en page(s) : pp. 630-636 Note générale : Electronique Langues : Anglais (eng) Mots-clés : H.264/AVC Motion estimation Video coding Index. décimale : 621.382 Dispositifs électroniques utilisant les effets des corps solides. Dispositifs semi-conducteurs Résumé : Several specific features have been incorporated into Motion estimation (ME) in H.264 coding standard to improve its coding efficiency.
However, they result in very high computational load. In this paper, a fast ME algorithm is proposed to reduce the computational complexity.
First, a mode discriminant method is used to free the encoder from checking the small block size modes in homogeneous regions.
Second, a condensed hierarchical block matching method and a spatial neighbor searching scheme are employed to find the best full-pixel motion vector.
Finally, direction-based selection rule is utilized to reduce the searching range in sub-pixel ME process.
Experimental results on commonly used QCIF and CIF format test sequences have shown that the proposed algorithm achieves a reduction of 88% ME process time on average, while incurring only 0.033 dB loss in PSNR and 0.50% increment on the total bit rate compared with that of exhaustive ME process, which is a default approach adopted in the JM reference software.DEWEY : 361.382 ISSN : 0923-5965 En ligne : http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235640%23 [...] [article] Fast motion estimation for H.264 [texte imprimé] / Canhui Cai, Auteur ; Huanqiang Zeng, Auteur ; Sanjit K. Mitra, Auteur . - pp. 630-636.
Electronique
Langues : Anglais (eng)
in Signal processing. Image communication > Vol. 24 N° 8 (Septembre 2009) . - pp. 630-636
Mots-clés : H.264/AVC Motion estimation Video coding Index. décimale : 621.382 Dispositifs électroniques utilisant les effets des corps solides. Dispositifs semi-conducteurs Résumé : Several specific features have been incorporated into Motion estimation (ME) in H.264 coding standard to improve its coding efficiency.
However, they result in very high computational load. In this paper, a fast ME algorithm is proposed to reduce the computational complexity.
First, a mode discriminant method is used to free the encoder from checking the small block size modes in homogeneous regions.
Second, a condensed hierarchical block matching method and a spatial neighbor searching scheme are employed to find the best full-pixel motion vector.
Finally, direction-based selection rule is utilized to reduce the searching range in sub-pixel ME process.
Experimental results on commonly used QCIF and CIF format test sequences have shown that the proposed algorithm achieves a reduction of 88% ME process time on average, while incurring only 0.033 dB loss in PSNR and 0.50% increment on the total bit rate compared with that of exhaustive ME process, which is a default approach adopted in the JM reference software.DEWEY : 361.382 ISSN : 0923-5965 En ligne : http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235640%23 [...]