[article]
| 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 [...] |
in Signal processing. Image communication > Vol. 24 N° 8 (Septembre 2009) . - pp. 630-636
[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 [...] |
|
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