Kamakshi Sivaramakrishnan

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— 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 schemes that are much more tractable than the original ones, while retaining their universal optimality properties. The schemes involve a simple preprocessing step of(More)
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 'clean'(More)
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)
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