New windowing techniques for variable-size block motion compensation

Zhang, J.; Ahmad, Maqsood; Swamy, M. N. S.

doi:10.1049/ip-vis:19982462

Cited by 7 publications

(2 citation statements)

References 6 publications

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“…Unlike with transform blocks, there is no pre-filter in the encoder to compensate for the blending done in the decoder. Zhang et al showed that splitting large blocks, but only as far as necessary to prevent their blending windows from overlapping more than one neighboring block, improved quality [12]. However, they implemented this as a post-process to a non-overlapped block-based motion search, and did not incorporate RDO.…”

Section: Overlapped Block Motion Compensationmentioning

confidence: 99%

Daala: Building a next-generation video codec from unconventional technology

Valin

Terriberry

Egge

et al. 2016

2016 IEEE 18th International Workshop on Multimedia Signal Processing (MMSP)

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Daala is a new royalty-free video codec that attempts to compete with state-of-the-art royalty-bearing codecs. To do so, it must achieve good compression while avoiding all of their patented techniques. We use technology that is as different as possible from traditional approaches to achieve this. This paper describes the technology behind Daala and discusses where it fits in the newly created AV1 codec from the Alliance for Open Media. We show that Daala is approaching the performance level of more mature, state-of-the art video codecs and can contribute to improving AV1.

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Section: Overlapped Block Motion Compensationmentioning

confidence: 99%

Daala: Building a next-generation video codec from unconventional technology

Valin

Terriberry

Egge

et al. 2016

2016 IEEE 18th International Workshop on Multimedia Signal Processing (MMSP)

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“…Early work demonstrated improvements simply by running OBMC as a postprocess to simple block-matching algorithms [6]. This was later extended to multiple block sizes, including adaptively determining the overlap [7], but still running as a post-process. We use a novel structure borrowed from surface simplification literature that allows efficient searching and partition size selection using the actual prediction, instead of a block-copy approximation.…”

Section: Introductionmentioning

confidence: 99%

Daala: A Perceptually-Driven Next Generation Video Codec

Daede,

Egge,

Valin

et al. 2016

Preprint

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The Daala project is a royalty-free video codec that attempts to compete with the best patent-encumbered codecs. Part of our strategy is to replace core tools of traditional video codecs with alternative approaches, many of them designed to take perceptual aspects into account, rather than optimizing for simple metrics like PSNR. This paper documents some of our experiences with these tools, which ones worked and which did not, and what we've learned from them. The result is a codec which compares favorably with HEVC on still images, and is on a path to do so for video as well.

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A new fuzzy overlapped motion compensation scheme

Ahmadianpour

Ahmad

2003 46th Midwest Symposium on Circuits and Systems

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In this paper, a new technique for reducing the blocking effect has .been presented. This technique cant be applied to different types of partitioning schenmes. In the proposed technique, the weighting coefficients of the OBMC scheme are modeled with four fuzzy relations. These fuzzy relations are formed based on two fuzzy sets, which define the closeness of a pixel to the block boundaries in both the horizontal and vertical directions. Furthermore, the appropriate fuzzy operators for these weighting functions are found. Simulation conducted on several test video sequences has demonstrated that the proposed technique can reduce the prediction error and improve the suibjective visual quality of a frame in comparison to the results obtained by using the generalized overlapped motion compensation scheme.

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New windowing techniques for variable-size block motion compensation

Cited by 7 publications

References 6 publications

Daala: Building a next-generation video codec from unconventional technology

Daala: Building a next-generation video codec from unconventional technology

Daala: A Perceptually-Driven Next Generation Video Codec

A new fuzzy overlapped motion compensation scheme

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