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Sub-Nyquist sampling based on Modulated Wideband Converter (MWC) as an innovative low rate sampling theory for sparse wideband signals draws much attention from researchers. However, the research in terms of implementation for this theory is far from satisfactory. In this paper, we present an implementation scheme for complete MWC sub-Nyquist sampling system. The proposed sampling system consists...
We consider a variable block size compressed sensing (CS) framework for high efficiency depth map coding. In this context, quad-tree decomposition is performed on a depth image to differentiate irregular uniform and edge areas prior to CS acquisition. To exploit temporal correlation and enhance coding efficiency, such quad-tree based CS acquisition is further extended to inter-frame encoding, where...
We address the problem of computing the level-crossings of an analog signal from samples measured on a uniform grid. Such a problem is important, for example, in multilevel analog-to-digital (A/D) converters. The first operation in such sampling modalities is a comparator, which gives rise to a bilevel waveform. Since bilevel signals are not bandlimited, measuring the level-crossing times exactly...
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