| Titre : | Fast motion estimation for H.264 |
| Auteurs : | Canhui Cai, Auteur ; Huanqiang Zeng, Auteur ; Sanjit K. Mitra, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Signal processing. Image communication (Vol. 24 N° 8, Septembre 2009) |
| Article en page(s) : | pp. 630-636 |
| Note générale : | Electronique |
| Langues : | Anglais |
| Index. décimale : | 621.382 (Dispositifs électroniques utilisant les effets des corps solides. Dispositifs semi-conducteurs) |
| Tags : | H.264/AVC Motion estimation Video coding |
| 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%232009%23999759991%231439059%23FLA%23&_cdi=5640&_pubType=J&_auth=y&_acct=C000070790&_version=1&_urlVersion=0&_userid=6909337&md5=b84bdd6dbfcf7615b600be9258c05adc |
