Hierarchical anchoring of motion fields for fully scalable video coding

Rüfenacht, Dominic; Mathew, Reji; Taubman, David

doi:10.1109/icip.2014.7025643

Cited by 8 publications

(3 citation statements)

References 7 publications

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“…Furthermore, Chen and Liu [53] used an adaptive Lagrange multiplier selection model in ratedistortion optimization (RDO) for motion estimation. In order to achieve more accurate motion data, Esche et al [56] proposed an interpolation method for motion information per pixel using block based motion data, and Rüfenacht et al [105] anchor motion fields at reference frames instead of target frames to resolve folding ambiguities in the vicinity of motion discontinuities.…”

Section: Related Workmentioning

confidence: 99%

Motion-Compensated Temporal Filtering for Critically-Sampled Wavelet-Encoded Images

Aydin,

Foroosh

2017

Preprint

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We propose a novel motion estimation/compensation (ME/MC) method for wavelet-based (in-band) motion compensated temporal filtering (MCTF), with application to low-bitrate video coding. Unlike the conventional in-band MCTF algorithms, which require redundancy to overcome the shift-variance problem of critically sampled (complete) discrete wavelet transforms (DWT), we perform ME/MC steps directly on DWT coefficients by avoiding the need of shift-invariance. We omit upsampling, the inverse-DWT (IDWT), and the calculation of redundant DWT coefficients, while achieving arbitrary subpixel accuracy without interpolation, and high video quality even at very low-bitrates, by deriving the exact relationships between DWT subbands of input image sequences. Experimental results demonstrate the accuracy of the proposed method, confirming that our model for ME/MC effectively improves video coding quality.

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Section: Related Workmentioning

confidence: 99%

Motion-Compensated Temporal Filtering for Critically-Sampled Wavelet-Encoded Images

Aydin,

Foroosh

2017

Preprint

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“…In this work, we transfer such discontinuity information from the reference frames to the target frame using a hierarchical extension of the breakpoint warping scheme proposed in [18]. The underlying idea of mapping breakpoints from reference to target frames is the fact that motion discontinuities travel with the foreground object.…”

Section: B) Temporal Breakpoint Inductionmentioning

confidence: 99%

“…To avoid these problems, we employ piecewise-smooth motion, and employ a cellular affine warping (CAW) procedure first proposed in [18] to warp motion fields from one frame to another. We use Fig.…”

Section: A) Inversion Of Motion Fieldsmentioning

confidence: 99%