Journal ArticleDOI
SNR scalability based on matching pursuits
C. De Vleeschouwer,Benoît Macq +1 more
TLDR
The proposed MP prediction method clearly outperforms all other conventional approaches and the same motion vectors can be used in both SNR layers, and the DFD prediction between layers improves coding efficiency.Abstract:
In this paper, SNR scalable representations of video signals are studied. The investigated codecs are well suited for communications applications because they are all based on backward motion-compensated predictive coding, which provides the necessary low-delay property. In a very-low bit rate context (VLBR), the matching pursuits (MP) signal representation algorithm is used to represent the displaced frame difference (DFD) of each layer of a multilevel decomposition of the video signal. A number of conventional prediction schemes that can be generalized to any DFD representation technique are considered. They are compared with an original and MP specific DFD prediction method. Two scenari have been considered. In the first scenario, an enhancement layer is built on a base layer that has been encoded using a classical, i.e., nonscalable scheme. In that case, all methods appear to be comparable, In the second scenario, the fact that the base layer is used as a reference for an enhancement layer is taken into account to build it. In that case, the proposed MP prediction method clearly outperforms all other conventional approaches, Additional lessons can be drawn from this work. The same motion vectors can be used in both SNR layers, and the DFD prediction between layers improves coding efficiency. Moreover, the MP representation of the signal enable us to measure the predictability of the high SNR layer DFD from the low SNR layer DFD, i.e., to quantify the part of the low SNR layer information that also belongs to the high SNR layer.read more
Citations
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Patent
Video encoding method based on the matching pursuit algorithm
TL;DR: In this paper, the authors propose an encoding method based on an adaptation of the matching pursuit method to an error texture coding process inside triangular meshes, which is restricted, at each iteration of the method, to a specific triangle selected according to a predefined criterion.
Patent
Coding and decoding of video data
Wen-Liang Hwang,Jian-Liang Lin +1 more
TL;DR: In this paper, the bit plains are represented by quadtrees and bit plane prediction is made to remove the spatial and temporal redundancy in a video, and the scalability of the video data is fine-grained since atoms of the motion residuals do not have to be grouped as coding units.
Journal ArticleDOI
Gain-shape optimized dictionary for matching pursuit video coding
TL;DR: It is shown that the vector quantizer (VQ) techniques can be used to optimize a matching pursuit dictionary and improve the PSNR performance at low bitrates.
Journal ArticleDOI
SNR scalability based on bitplane coding of matching pursuit atoms at low bit rates: fine-grained and two-layer
TL;DR: This work proposes an FGS video codec and a two-layer signal-to-noise ratio (SNR) scalable video codec, based on matching pursuits and bitplane coding, and proposes using a combined frame obtained from the combination of the reconstructed base layer and enhancement layer images to estimate motion vectors.
Journal ArticleDOI
On the statistics of matching pursuit angles
TL;DR: The statistics of the angle between the residue signal and the element selected in each iteration of the matching pursuit are studied, what allows to model matching pursuits coefficients indirectly and results in a simple statistical model.
References
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Journal ArticleDOI
Matching pursuits with time-frequency dictionaries
Stéphane Mallat,Zhifeng Zhang +1 more
TL;DR: The authors introduce an algorithm, called matching pursuit, that decomposes any signal into a linear expansion of waveforms that are selected from a redundant dictionary of functions, chosen in order to best match the signal structures.
Journal ArticleDOI
Multirate 3-D subband coding of video
David Taubman,Avideh Zakhor +1 more
TL;DR: A full color video compression strategy, based on 3-D subband coding with camera pan compensation, to generate a single embedded bit stream supporting multiple decoder display formats and a wide, finely gradated range of bit rates is proposed.
Journal ArticleDOI
The MPEG-4 video standard verification model
TL;DR: The scope of the MPEG-4 video standard is described and the structure of the video verification model under development is outlined, to provide a fully defined core video coding algorithm platform for the development of the standard.
Journal ArticleDOI
Low-complexity video coding for receiver-driven layered multicast
TL;DR: A layered video compression algorithm which, when combined with RLM, provides a comprehensive solution for scalable multicast video transmission in heterogeneous networks.
Journal ArticleDOI
Multipoint communication: a survey of protocols, functions, and mechanisms
TL;DR: In this article, a survey of protocol functions and mechanisms for data transmission within a group, from multicast routing problems up to end-to-end multipoint transmission control is presented.