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- Kamakshi Sivaramakrishnan, Tsachy Weissman
- IEEE Transactions on Signal Processing
- 2007

We revisit the problem of denoising a discrete-time, continuous-amplitude signal corrupted by a known memoryless channel. By modifying our earlier approach to the problem, we obtain a scheme that is much more tractable than the original one and at the same time retains the universal optimality properties. The universality refers to the fact that the… (More)

- Kamakshi Sivaramakrishnan, Tsachy Weissman
- IEEE Transactions on Information Theory
- 2006

We consider the problem of reconstructing a discrete-time signal (sequence) with continuous-valued components corrupted by a known memoryless channel. When performance is measured using a per-symbol loss function satisfying mild regularity conditions, we develop a sequence of denoisers that, although independent of the distribution of the underlying… (More)

- Kamakshi Sivaramakrishnan, Truong Nguyen
- ICASSP
- 2001

This paper describes a uniform transform domain Video Codec where the motion estimation/compensation (ME) is performed in the transform domain. The estimation technique discussed here is a subpixel transform domain ME based on the Dual Tree Complex Wavelet Transform (DT CWT) and a maximum phase correlation technique. The DT CWT is a multiresolution… (More)

- Kamakshi Sivaramakrishnan, Tsachy Weissman
- 2006 International Conference on Image Processing
- 2006

We consider the problem of image denoising wherein the statistical characterization of the noise corruption mechanism is known. We make no assumptions on the nature or statistics of the underlying noise-free signal. A denoiser is proposed which, although ignorant of the statistical properties of the noise-free image, does essentially as well as a scheme… (More)

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