Rate-distortion and complexity joint optimization for fast motion estimation in H.264 video coding
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Dosyalar
Tarih
2006
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
IEEE
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
H.264 video coding standard offers several coding modes including inter-prediction modes that use macroblock partitions with variable block sizes. Choosing a rate-distortion optimal mode among these possibilities contributes significantly to the superior coding efficiency of the H.264 encoder. Unfortunately, searching for optimal motion vectors of each possible subblock incurs a heavy computational cost. In this paper, in order to reduce the complexity of integer-pel motion estimation, we propose a rate-distortion and complexity joint optimization method that selects for each MB a subset of partitions to evaluate during motion estimation. This selection is based on simple measures of spatio-temporal activity within the MB. The procedure is optimized to minimize mode estimation error at a certain level of computational complexity. Simulation results show that the algorithm speeds up the motion estimation module by a factor of up to 20 with little loss in coding efficiency.
Açıklama
This research was supported by the TUBITAK Grant 104E125.
Anahtar Kelimeler
Motion compensation, Video coding, Clocks, Computational complexity, Computational efficiency, Estimation error, Motion estimation, Motion measurement, Partitioning algorithms, Performance loss, Rate-Distortion, H.264 video coding standard, Image selection, Joint optimization, Mode estimation error, Spatio-temporal activity, Error analysis, Optimisation, Rate distortion theory, Spatiotemporal phenomena, Electric distortion, Estimation, Image coding, Imaging systems, Motion Picture Experts Group standards, Optimization, Signal distortion, Algorithm speed, Coding efficiency, Coding mode, Computational costs, Fast motion estimation, H.264 encoders, H.264 video coding, Macroblock partitions, Mode estimation, Optimal motion, Prediction modes, Rate distortions, Rate-distortion optimal, Simulation result, Spatio-temporal activities, Sub-blocks, Variable block size
Kaynak
2006 International Conference on Image Processing
WoS Q Değeri
N/A
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Sayı
Künye
Ateş, H. F., Kanberoğlu, B. & Altunbaşak, Y. (2006). Rate-distortion and complexity joint optimization for fast motion estimation in H.264 video coding. Paper presented at the 2006 International Conference on Image Processing, 37-40. doi:10.1109/ICIP.2006.313149
