Decoder-Side Motion Estimation Assuming Temporally or Spatially Constant Motion

Decoder-Side Motion Estimation Assuming Temporally or Spatially ConstantMotion

In current video coding standards, the encoder exploits temporal redundancies within the video sequence by performing blockbased 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 mot...

Motion Estimation at the Decoder

All existing video coding standards, such as MPEG-1,2,4 or ITU-T H.26x, perform motion estimation at the encoder in order to exploit temporal dependencies within the video sequence. The estimated motion vectors are transmitted and used by the decoder to assemble a prediction of the current frame. Since only the prediction error and the motion information are transmitted, instead of intra coding...

Temporally Consistent Depth Map Estimation Using Motion Estimation for 3DTV

In this paper, we propose a new algorithm to estimate temporally consistent depth sequence. Our algorithm first calculates the matching cost using left and right views. In order to enhance the temporal consistency, we modify the matching function by adding the temporal weighting function and we perform the motion estimation technique to refer to the previous depths of moving objects. Experiment...

Decoder-side motion vector derivation for hybrid video coding

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

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. T...