scholarly journals Block-Based Motion Estimation Using the Pixelwise Classification of the Motion Compensation Error

2012 ◽  
Vol 3 (5) ◽  
pp. 1-17
Author(s):  
Jun Yong Kim
Keyword(s):  
Motion Estimation ◽  
Motion Compensation ◽  
Compensation Error ◽  
Block Based

scholarly journals Decoder-Side Motion Estimation Assuming Temporally or Spatially Constant Motion

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Sven Klomp ◽  
Marco Munderloh ◽  
Jörn Ostermann
Keyword(s):  
Motion Estimation ◽  
Motion Compensation ◽  
Video Sequence ◽  
Interpolation Method ◽  
Motion Vector ◽  
Combined Approach ◽  
Rate Reduction ◽  
Compression Efficiency ◽  
Coding Standards ◽  
Block Based

In current video coding standards, the encoder exploits temporal redundancies within the video sequence by performing block-based motion compensated prediction. However, the motion estimation is only performed at the encoder, and the motion vectors have to be coded explicitly into the bit stream. Recent research has shown that the compression efficiency can be improved by also estimating the motion at the decoder. This paper gives a detailed description of a decoder-side motion estimation architecture which assumes temporal constant motion and compares the proposed motion compensation algorithm with an alternative interpolation method. The overall rate reduction for this approach is almost 8% compared to H.264/MPEG-4 Part 10 (AVC). Furthermore, an extensive comparison with the assumption of spatial constant motion, as used in decoder-side motion vector derivation, is given. A new combined approach of both algorithms is proposed that leads to 13% bit rate reduction on average.

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.

Sign in / Sign up

Export Citation Format

Share Document