Low complexity variable-size block-matching motion estimation for adaptive motion compensation block size in H.264

2005 ◽  
Author(s):  
Shen-Chuan Tai ◽  
Ying-Ru Chen ◽  
Sheng-Jia Li
Keyword(s):  
Motion Estimation ◽  
Motion Compensation ◽  
Block Size ◽  
Low Complexity ◽  
Block Matching ◽  
Variable Size ◽  
Adaptive Motion

Analysis and Implementation of MPEG-4 Motion Codec

2012 ◽  
Vol 268-270 ◽  
pp. 1667-1670
Author(s):  
Yun Peng Liu ◽  
Ren Fang Wang ◽  
Jin Li
Keyword(s):  
Motion Estimation ◽  
Motion Compensation ◽  
Block Matching ◽  
Modified Block

Motion codec is the key technique of MPEG-4 VM. The motion encoding and decoding use “Unrestricted Motion Estimation”, “Advanced Prediction”, “Overlapped Motion Compensation”, in addition, the particular “Repetitive Padding”, and “Modified Block Matching “ are added for MPEG-4. At the same time, some questions during motion are explained carefully, and some new viewpoints are brought forward.

HIGH PERFORMANCE, LOW-COMPLEXITY LINE-BASED MOTION ESTIMATION ALGORITHM WITH SMOOTHING AND PREPROCESSING

2009 ◽  
Vol 23 (01) ◽  
pp. 101-114 ◽  
Author(s):  
LI WERN CHEW ◽  
WAI CHONG CHIA ◽  
LI-MINN ANG ◽  
KAH PHOOI SENG
Keyword(s):  
Motion Estimation ◽  
High Performance ◽  
Reference Frames ◽  
Estimation Algorithm ◽  
Low Complexity ◽  
Block Matching ◽  
Absolute Difference ◽  
Current Frame ◽  
Block Matching Algorithm ◽  
The Difference

This paper introduces a smoothing and preprocessing (S+P) technique for a line-based one-bit-transform (1BT) motion estimation scheme. In the proposed algorithm, a smoothing threshold ( Threshold S) is incorporated into the 1BT convolutional kernel. By using the smoothing threshold, scattering noise which is a common problem in most 1BT images can be greatly reduced. After the transformation, the 1BT images for the current and reference frames are divided into a number of macroblocks. The macroblock in the current frame is first compared with the macroblock at the same position in the reference frame. If the Sum of Absolute Difference (SAD) is below a certain preprocessing threshold ( Threshold P), the macroblock in the current frame is considered to have negligible movement and motion search is not performed. Simulation results show that this technique achieves high performance and greatly reduces the number of search operations. By incorporating the S+P technique, the PSNR achieved by the 1BT is approaches the performance of the 8-bit Full Search Block Matching Algorithm (FSBMA), and the difference is as low as 0.08 dB. In addition, this technique outperforms current state-of-the-art 1BT motion estimation techniques. An improvement in PSNR performance by up to 0.6 dB and a reduction in the number of search operations by 60% to 93% is achieved using video conferencing sequences.

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