scholarly journals Block Based Motion Vector Estimation Using FUHS16, UHDS16 and UHDS8 Algorithms for Video Sequence

10.5772/14289 ◽  
2011 ◽  
Author(s):  
S. S. S. Ranjit
Keyword(s):  
Video Sequence ◽  
Motion Vector ◽  
Vector Estimation ◽  
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.

An Improved Error Concealment Based on Redundant Motion Vector Information

2012 ◽  
Vol 532-533 ◽  
pp. 1219-1224
Author(s):  
Hong Tao Deng
Keyword(s):  
Video Transmission ◽  
Error Concealment ◽  
Video Quality ◽  
Motion Vector ◽  
Compressed Video ◽  
Vector Information ◽  
Vector Estimation ◽  
Channel Errors ◽  
Bit Stream

During video transmission over error prone network, compressed video bit-stream is sensitive to channel errors that may degrade the decoded pictures severely. In order to solve this problem, error concealment technique is a useful post-processing tool for recovering the lost information. In these methods, how to estimate the lost motion vector correctly is important for the quality of decoded picture. In order to recover the lost motion vector, an Decoder Motion Vector Estimation (DMVE) criterion was proposed and have well effect for recover the lost blocks. In this paper, we propose an improved error concealment method based on DMVE, which exploits the accurate motion vector by using redundant motion vector information. The experimental results with an H.264 codec show that our method improves both subjective and objective decoder reconstructed video quality, especially for sequences of drastic motion.

A Flexible Real Time HDTV Motion Vector Estimation Chipset Based on Phasecorrelation

1994 ◽  
pp. 379-387
Author(s):  
K. Mueller ◽  
D. Siebert ◽  
F. Schirrmeister ◽  
C.v. Reventlow ◽  
J. Reimers
Keyword(s):  
Real Time ◽  
Motion Vector ◽  
Vector Estimation
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