Self-derivation of motion estimation techniques to improve video coding efficiency

Motion estimation is the most important step in video compression. By using high precision motion vector in the H.264 encoder, the calculation is rapidly increased, but in the whole process of coding, motion estimation occupies about 80%. Although many motion estimation algorithms have been proposed to reduce the computational complexity of motion estimation, it still cannot meet the strict real-time demand. In this paper, based on the analysis of UMHexagonS algorithm, dynamic searching window is chosen in the UMHexagonS algorithm, then according to the motion activity, it uses different template to reduce the motion estimation time and improve video coding efficiency. Proved by the experiments on various test sequences, compared with the UMHexagonS algorithm, the motion estimation time of the proposed algorithm average saves 17.7525% in the case of the quality of the reconstructed image and rate close. It not only reduces the complexity of the algorithm, but also improves the real-time performance of the encoder.

Download Full-text

Adaptive multiresolution motion estimation techniques for wavelet-based video coding

10.1117/12.298410 ◽

1998 ◽

Cited By ~ 8

Author(s):

Mrinal K. Mandal ◽

Tyseer Aboulnasr ◽

Sethuraman Panchanathan

Keyword(s):

Motion Estimation ◽

Video Coding ◽

Estimation Techniques ◽

Multiresolution Motion Estimation

Download Full-text

Low-Complexity Encoding in Block-Based Hybrid Video Codecs by Moving Motion Estimation to Decoder Side

International Journal of Adaptive Resilient and Autonomic Systems ◽

10.4018/ijaras.2014010102 ◽

2014 ◽

Vol 5 (1) ◽

pp. 19-29

Author(s):

J. Karlsson

Keyword(s):

Motion Estimation ◽

Video Coding ◽

Low Complexity ◽

Motion Prediction ◽

Motion Vectors ◽

Video Codecs ◽

Coding Efficiency ◽

Coding Scheme ◽

Network Delays ◽

Block Based

In this paper the authors present an approach to provide efficient low-complexity encoding for the block-based video coding scheme. The authors present a method based on removing the most time-consuming task, that is motion estimation, from the encoder. Instead the decoder will perform motion prediction based on the available decoded frame and send the predicted motion vectors to the encoder. The results presented are based on a modified H.264 implementation. The results show that this approach can provide rather good coding efficiency even for relatively high network delays.

Download Full-text