Adaptive down-sampling of frame-rate for high frame-rate video
PCS'09 Proceedings of the 27th conference on Picture Coding Symposium
Temporal down-sampling algorithm of high frame-rate video for reducing inter-frame prediction error
ICIP'09 Proceedings of the 16th IEEE international conference on Image processing
Hierarchical motion-compensated frame interpolation based on the pyramid structure
PCM'06 Proceedings of the 7th Pacific Rim conference on Advances in Multimedia Information Processing
New frame rate up-conversion using bi-directional motion estimation
IEEE Transactions on Consumer Electronics
Adaptive motion-compensated interpolation for frame rate up-conversion
IEEE Transactions on Consumer Electronics
Efficiency analysis of multihypothesis motion-compensated prediction for video coding
IEEE Transactions on Image Processing
Optimal temporal interpolation filter for motion-compensated frame rate up conversion
IEEE Transactions on Image Processing
A method for motion adaptive frame rate up-conversion
IEEE Transactions on Circuits and Systems for Video Technology
Overview of the H.264/AVC video coding standard
IEEE Transactions on Circuits and Systems for Video Technology
IEEE Transactions on Circuits and Systems for Video Technology
True-motion estimation with 3-D recursive search block matching
IEEE Transactions on Circuits and Systems for Video Technology
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Reducing the frame rate of a sequence results in the information loss of interpolated frames that cannot be recovered by temporal up-sampling. The most prevalent frame rate reduction method is the direct down-sampling, which maintains the original frames of the input sequence with a constant interval. It achieves wide applications due to simplicity. However, it neglects the influences on interpolated frames brought by temporal up-sampling. To maintain more information during down-sampling, which will be used for interpolation, this paper proposes an up-sampling oriented frame rate reduction by hinging the temporal up-sampling and down-sampling. It is designed with the goal of improving the quality of up-sampled frames while keeping the down-sampled sequence faithful to the input one. For a particular temporal up-sampling method, e.g., motion compensation frame interpolation, the optimal down-sampled frame is the one that not only minimizes the difference between the original and the down-sampled frames but also minimizes the difference between the original and the corresponding up-sampled frames. Users can make a tradeoff between the two difference terms by selecting a proper lagrange factor depending on the applications. Furthermore, to decrease the space and computational complexity, a block-wise implementation is also devised in this paper. Experimental results conducted on various sequences demonstrate that the proposed frame rate reduction is able to significantly improve the quality of up-sampled frames compared with other down-sampling methods.