Motion-and aliasing-compensated prediction using a two-dimensional non-separable adaptive Wiener interpolation filter

Vatis, Y.; Edler, Bernd; Nguyen, Dieu Thanh; Östermann, Jörn

doi:10.1109/icip.2005.1530200

Cited by 36 publications

(50 citation statements)

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“…In this paper, we claim that symmetry assumption in [4] has two shortcomings. Firstly, the statistical properties of the image sequence are not stationary and fixed symmetry assumption may not hold for every frame of the image sequence.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Interpolation Filter with Flexible Symmetry for Coding High Resolution High Quality Video

Uǧur

Lainema

Gabbouj

2007

2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07

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In this work, a novel sub-pixel interpolation algorithm is proposed for video coders targeted towards high resolution and high fidelity use cases. Proposed scheme is based on adapting the interpolation filter's symmetry assumptions in a Rate-Distortion-Optimized fashion, taking into account the coding rate and the statistical properties of each image of the video sequence. Experimental results show that, using the proposed algorithm a gain of up-to 1.1 dB is achieved compared to non-adaptive sub-pixel interpolation of H.264/AVC. Compared to other state-of-the-art adaptive sub-pixel interpolation methods, a gain of up-to 0.5 dB is achieved. Proposed scheme outperforms H.264/AVC for all test cases; however, improvement is more significant at high bitrates and at high resolutions. This is especially important for future video coding solutions targeting high fidelity video applications.

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Section: Introductionmentioning

confidence: 99%

Adaptive Interpolation Filter with Flexible Symmetry for Coding High Resolution High Quality Video

Uǧur

Lainema

Gabbouj

2007

2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07

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“…However, in order to improve coding efficiency of the interpolation, Adaptive Interpolation Filtering (AIF) with Wiener filters has been extensively studied in the recent years [2]- [4]. The AIF schemes proposed in literature differ significantly in terms of filter structure and tap-length.…”

mentioning

confidence: 99%

“…However, all of these schemes provide comparable results on average for a wide set of test video material. It was reported in [2]- [5], that AIF schemes provide improvement of up to 1.1 dB (30% bitrate savings) in coding gain and 17% of bitrate reduction on average for high resolution video content compared to the standard interpolation filter used in H.264/AVC.…”

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confidence: 99%

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Efficient SIMD-based implementation of adaptive filter

Hallapuro

Rusanovskyy

Uǧur

et al. 2010

Proceedings of 2010 IEEE International Symposium on Circuits and Systems

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Abstract-Directional Adaptive Interpolation Filtering (DAIF) is a novel interpolation technique that was proposed recently for hybrid video coding. It was reported, that this technique outperforms the standard H.264/AVC interpolation in terms of coding gain whereas requiring smaller number of arithmetic operations. In this publication we present an optimized implementation of DAIF on a modern computing platform exploiting the Single Instruction Multiple Data (SIMD) parallelism. In addition, we provide a complexity analysis in which the computational complexity is estimated as number of clock cycles per output sample. Proposed SIMD-based implementation of DAIF has lower or comparable interpolation complexity, compared to the highly optimized SIMD-based implementation of the H.264/AVC interpolations. Considering significantly better coding gain provided by DAIF, we believe this approach will play a significant role in future video coding standards.

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“…A disadvantage of MCIF is the sensitivity concerning displacement vector estimation errors. Thus, quality improvement could only be achieved in combination with In this paper, we present a new strategy for calculation of optimal filter coefficients for a 2D non-separable motion compensated interpolation filter 5 and an approach for efficient conding of filter coefficients, required especially at low bit rates and small resolution videos. In the following section, the new scheme of interpolation filter is described.…”

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confidence: 99%

Coding of coefficients of two-dimensional non-separable adaptive Wiener interpolation filter

Vatis

Edler

Wassermann

et al. 2005

Visual Communications and Image Processing 2005

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Standard video compression techniques apply motion-compensated prediction combined with transform coding of the prediction error. 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. Since transmitting filter coefficients as side information results in an additional bit rate, which is almost independent for different total bit rates and image resolutions, the overall gain decreases when total bit rates decrease. In this paper we present an algorithm, which regards the non-separable two-dimensional filter as a polyphase filter. For each frame, predicting the interpolation filter impulse response through evaluation of the polyphase filter, we only have to encode the filter coefficients prediction error. This enables bit rate savings, needed for transmitting filter coefficients of up to 75% compared to PCM coding. A coding gain of up to 1,2 dB Y-PSNR at same bit rate or up to 30% reduction of bit rate is obtained for HDTV-sequences compared to the standard H.264/AVC. Up to 0,5 dB (up to 10% bit rate reduction) are achieved for CIF-sequences.

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Motion-and aliasing-compensated prediction using a two-dimensional non-separable adaptive Wiener interpolation filter

Cited by 36 publications

References 4 publications

Adaptive Interpolation Filter with Flexible Symmetry for Coding High Resolution High Quality Video

Adaptive Interpolation Filter with Flexible Symmetry for Coding High Resolution High Quality Video

Efficient SIMD-based implementation of adaptive filter

Coding of coefficients of two-dimensional non-separable adaptive Wiener interpolation filter

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