We consider a joint source-channel coding system that protects an embedded bitstream using a finite family of channel codes with error detection and error correction capability. The performance of this system may be measured by the expected distortion or by the expected number of correctly decoded source bits. Whereas a rate-based optimal solution can be found in linear time, the computation of...

In a recent contribution, H. Naito (1999) has shown that production efciency may be violated in the optimum with non-linear income taxation. Using a slightly simpler framework, this paper complements Naito's analysis in showing that production e ciency does not hold in the optimum with (i) non-linear and (ii) linear income taxation provided that second best and rst best do not coincide. These n...

We present a state-of-the-art linear redshift distortion analysis of the recently published IRAS Point Source Catalog Redshift Survey (PSCz). The procedure involves linear compression into 4096 Karhunen-Loève (signal-to-noise) modes culled from a potential pool of ∼ 3× 10 modes, followed by quadratic compression into three separate power spectra, the galaxy-galaxy, galaxy-velocity, and velocity...

It is once again presented and discussed in this paper that the method of distortion calibration based on 2D Direct Linear Transformation (DLT) is easy and feasible. It is emphasized that it is fit for the creation of distortion model for solid-state cameras (CCD, CID, PSD) to compensate for the system errors of various image points. The application of the distortion model presented in this pap...

In this paper ranking of harmonic distortion of each nonlinear load like economical, ministerial, residential and others include hotels, hospitals, universities and terminals in the HORMOZGAN Province Electrical power Distribution network is determined by using new power quality index which is directly related on harmonic distortion sources in the distribution power system. Then, the ranking of...

We consider the combinatorial problem of embedding a tree metric into the real line with low distortion. For two special families of trees — the family of complete binary trees and the family of subdivided stars — we provide embeddings whose distortion is provably optimal, up to a constant factor. We also prove that the optimal distortion of a linear embedding of a tree can be arbitrarily low o...

This paper provides a mathematical analysis of transform compression in its relationship to linear and non-linear approximation theory. Contrasting linear and non-linear approximation spaces, we show that there are interesting classes of functions/random processes which are much more compactly represented by wavelet-based non-linear approximation. These classes include locally smooth signals th...

Introduction Diffusion weighted single shot spin-echo planer imaging (DW-EPI) is commonly used for diffusion tensor imaging (DTI). DW-EPI is very sensitive to static magnetic field (B0) inhomogeneities (such as that near air-tissue boundary) that produce geometric distortion, primarily along the phase-encoding direction. As a result, artifacts are severe in the frontal and temporal lobes due to...

We apply an asynchronous interpolation model (AIM) to line spectral frequency trajectories. AIM represents speech transition features as crossfading between basis vector features, governed by individual interpolation weights per feature component. Basis vectors are initialized from demiphone labels, and then optimized using a local reconstruction error. Using a small diphone acoustic inventory,...

The distortion cost function used in Mosesstyle machine translation systems has two flaws. First, it does not estimate the future cost of known required moves, thus increasing search errors. Second, all distortion is penalized linearly, even when appropriate reorderings are performed. Because the cost function does not effectively constrain search, translation quality decreases at higher distor...