Journal ArticleDOI
Very low bit-rate color video coding using adaptive subband vector quantization with dynamic bit allocation
S.P. Voukelatos,John J. Soraghan +1 more
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TLDR
A novel adaptive vector quantization (VQ) based subband coding scheme for very low bit rate coding of video sequences is presented and overlapped block motion estimation/compensation is employed to exploit interframe redundancy.Abstract:
A novel adaptive vector quantization (VQ) based subband coding scheme for very low bit rate coding of video sequences is presented. Overlapped block motion estimation/compensation is employed to exploit interframe redundancy. A two-dimensional (2-D) wavelet transform (WT) is applied to the resulting displaced frame difference (DFD) signal. The WT coefficients are encoded using an adaptive subband vector quantization (ASBVQ) scheme in combination with a dynamic bit allocation strategy based on marginal analysis. Fixed rate coding is provided. Comparative experimental results of the ASBVQ codec with the H.261 and the H.263 video coding standards are given.read more
Citations
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Journal ArticleDOI
The asymptotic closed-loop approach to predictive vector quantizer design with application in video coding
TL;DR: This work proposes an approach to PVQ design that enjoys the stability of open-loop design while it ensures ultimate optimization of the closed-loop system, and demonstrates it on video compression at low bit rates, where it provides substantial improvement over standard open and closed loop design techniques.
Journal ArticleDOI
Significance-linked connected component analysis for very low bit-rate wavelet video coding
TL;DR: Experimental results on eight standard MPEG-4 test sequences show that for intraframe coding, the proposed VSLCCA codec exceeds H.263 and ZTE (zero-tree entropy) in peak signal-to-noise ratio by as much as 2.07 and 1.38 dB at 28 kbit/s, respectively.
Journal ArticleDOI
Adaptive joint subband vector quantisation codec for handheld videophone applications
TL;DR: A new wavelet-based video codec is presented, which joins vectors in the same subbands of different frames in a frame group and uses the properties of the human visual system.
Proceedings ArticleDOI
Multistage Lattice Vector Quantization for Hyperspectral Image Compression
Ying Liu,William A. Pearlman +1 more
TL;DR: In the proposed algorithm, multistage lattice vector quantization (MLVQ) is used to exploit correlations between image slices, while offering successive refinement with low coding complexity and computation.
Journal ArticleDOI
A new multistage lattice vector quantization with adaptive subband thresholding for image compression
TL;DR: A new multistage LVQ (MLVQ) using an adaptive subband thresholding technique is presented and applied to image compression and experimental results are shown to be significantly better than JPEG 2000 and the recent VQ techniques.
References
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Journal ArticleDOI
An Algorithm for Vector Quantizer Design
Y. Linde,A. Buzo,Robert M. Gray +2 more
TL;DR: An efficient and intuitive algorithm is presented for the design of vector quantizers based either on a known probabilistic model or on a long training sequence of data.
Journal ArticleDOI
The Quadtree and Related Hierarchical Data Structures
TL;DR: L'accentuation est mise sur la representation de donnees dans les applications de traitement d'images, d'infographie, les systemes d'informations geographiques and the robotique.
Journal ArticleDOI
Discrete Optimization Via Marginal Analysis
TL;DR: Discrete optimization subject to one constraint is attacked by Lagrangian analysis and the complete family of undominated allocations is generated.
Journal ArticleDOI
Multiscale video representation using multiresolution motion compensation and wavelet decomposition
TL;DR: A multiscale video representation using wavelet decomposition and variable-block-size multiresolution motion estimation (MRME) is presented and appears suitable for the broadcast environment where various standards may coexist simultaneously.
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