Proceedings ArticleDOI
Motion-and aliasing-compensated prediction using a two-dimensional non-separable adaptive Wiener interpolation filter
Yuri Vatis,Bernd Edler,Dieu Thanh Nguyen,Jörn Ostermann +3 more
- Vol. 2, pp 894-897
TLDR
A two-dimensional (2D) non-separable interpolation filter, which is calculated for each frame independently by minimising the prediction error energy, is developed in the context of prediction with fractional-pel motion vector resolution.Abstract:
In the context of prediction with fractional-pel motion vector resolution it was shown, that aliasing components contained in an image signal are limiting the prediction accuracy obtained by motion compensation. In order to consider aliasing, quantisation and motion estimation errors, camera noise, etc., we analytically developed a two-dimensional (2D) non-separable interpolation filter, which is calculated for each frame independently by minimising the prediction error energy. For every fractional-pel position to be interpolated, an individual set of 2D filter coefficients is determined. As a result, a coding gain of up to 1,2 dB for HDTV-sequences and up to 0,5 dB for CIF-sequences compared to the standard H.264/AVC is obtained.read more
Citations
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Patent
Method and apparatus for video encoding and decoding using adaptive interpolation
Frank Bossen,Alexandros Tourapis +1 more
TL;DR: In this paper, a method and apparatus for video encoding and decoding using adaptive interpolation is described, in which the decoding method comprises decoding a reference index, decoding a motion vector, selecting a reference frame according to the reference index; selecting a filter, and filtering a set of samples of the reference frame using the filter to obtain the predicted block.
Patent
Video encoding method and video decoding method
Steffen Wittmann,Thomas Wedi +1 more
TL;DR: In this paper, a video coding apparatus consisting of a first orthogonal transformation unit performing discrete cosine transform on an input picture signal, a low pass filter performing low-pass filtering on the input image signal, and a downsampling unit downsampledging the resolution of a low-frequency image signal was presented.
Patent
Adaptive interpolation filters for video coding
Dmytro Rusanovskyy,Kemal Ugur +1 more
TL;DR: In this article, a predefined base filter has fixed coefficient values and a prediction signal representative of the difference between a video frame and a reference image is calculated from the reference image based on a pre-defined base filter and motion estimation performed on the video frame.
Patent
Dynamic image encoding device, dynamic image encoding method, dynamic image encoding program, dynamic image decoding device, dynamic image decoding method, and dynamic image decoding program
Sadaatsu Kato,Choong Seng Boon +1 more
TL;DR: In this paper, a dynamic image encoding device (20) was proposed for motion compensation by creating a reference image of a fractional pixel accuracy by using a filter for each of frame images.
Patent
Digital video coding with interpolation filters and offsets
TL;DR: In this paper, the authors describe techniques for encoding digital video data using interpolation filters and offsets, which can be configured to select interpolation filter for sub-pixel precision motion estimation based on historical interpolation results obtained for previously encoded video units, such as frames or slices.
References
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Journal ArticleDOI
Motion- and aliasing-compensated prediction for hybrid video coding
Thomas Wedi,H.G. Musmann +1 more
TL;DR: In order to reduce the bit rate of video signals, the standardized coding techniques apply motion-compensated prediction in combination with transform coding of the prediction error and a Wiener interpolation filter and 1/4-pel displacement vector resolution is applied.
Journal ArticleDOI
Drift analysis and drift reduction for multiresolution hybrid video coding
TL;DR: A two step drift reduction method which substantially reduces drift by 7.9 dB on the average compared to a reference method which consists of bilinear interpolation filtering in the first step and conventional block motion compensation in the second step.
Proceedings ArticleDOI
Coding of coefficients of two-dimensional non-separable adaptive Wiener interpolation filter
TL;DR: An algorithm is presented, which regards the non-separable two-dimensional filter as a polyphase filter, which enables bit rate savings, needed for transmitting filter coe±cients of up to 75% compared to PCM coding.
Proceedings ArticleDOI
Adaptive interpolation filter for motion and aliasing compensated prediction
TL;DR: An adaptive interpolation filter is presented that improves the coding efficiency of an H.26L codec by reducing the impact of displacement estimation errors and by compensating the aliasing components.