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The emerging field of signal processing on graphs: Extending high-dimensional data analysis to networks and other irregular domains
TLDR
In applications such as social, energy, transportation, sensor, and neuronal networks, high-dimensional data naturally reside on the vertices of weighted graphs. Expand
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  • 326
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Graph Signal Processing: Overview, Challenges, and Applications
TLDR
Research in graph signal processing (GSP) aims to develop tools for processing data defined on irregular graph domains. Expand
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Rate-distortion methods for image and video compression
TLDR
In this article we provide an overview of rate-distortion (R-D) based optimization techniques and their practical application to image and video coding. Expand
  • 860
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Perfect Reconstruction Two-Channel Wavelet Filter Banks for Graph Structured Data
  • S. Narang, A. Ortega
  • Mathematics, Computer Science
  • IEEE Transactions on Signal Processing
  • 18 June 2011
TLDR
We propose the construction of two-channel wavelet filter banks for analyzing functions defined on the vertices of any arbitrary finite weighted undirected graph. Expand
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Bit allocation for dependent quantization with applications to multiresolution and MPEG video coders
TLDR
We address the problem of efficient bit allocation in a dependent coding environment. Expand
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Efficient Sampling Set Selection for Bandlimited Graph Signals Using Graph Spectral Proxies
TLDR
We study the problem of selecting the best sampling set for bandlimited reconstruction of signals on graphs. Expand
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Graph Learning From Data Under Laplacian and Structural Constraints
TLDR
We propose a novel framework for learning/estimating graphs from data and propose efficient block-coordinate descent algorithms. Expand
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Compact Support Biorthogonal Wavelet Filterbanks for Arbitrary Undirected Graphs
  • S. Narang, A. Ortega
  • Mathematics, Computer Science
  • IEEE Transactions on Signal Processing
  • 30 October 2012
TLDR
This paper extends previous results on wavelet filterbanks for data defined on graphs from the case of orthogonal transforms to more general and flexible biorthogonal transform. Expand
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Bit-rate control using piecewise approximated rate-distortion characteristics
  • L. Lin, A. Ortega
  • Computer Science
  • IEEE Trans. Circuits Syst. Video Technol.
  • 1 August 1998
TLDR
We propose two methods which provide successive reductions in complexity by: (1) using models to interpolate rate and distortion characteristics, and (2) using past frames instead of current ones to determine the models. Expand
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VBR video: tradeoffs and potentials
TLDR
The authors examine the transport and storage of video compressed with a variable bit rate (VBR). Expand
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