Time difference of arrival (TDOA) is commonly used to estimate the azimuth of a source in a microphone array. The most common methods to estimate TDOA are based on finding extrema in generalized crosscorrelation waveforms. In this paper we apply microphone array techniques to a manikin head. By considering the entire cross-correlation waveform we achieve azimuth prediction accuracy that exceeds...

A model registration system capable of tracking an object through distinct aspects in real-time is presented. The system integrates tracking, pose determination, and aspect graph indexing. The tracking combines steerable lters with normalized crosscorrelation, compensates for rotation in 2D and is adaptive. Robust statistical methods are used in the pose estimation to detect and remove mismatch...

Chaotic sequences produced by piecewise linear maps can be transformed to binary sequences. The binary sequences are optimal for the asynchronous DS/CDMA systems in case of certain shapes of the maps. This paper is devoted to the one-to-one integer-number maps derived from the suitable asymmetrical piecewise linear maps. Such maps give periodic integer-number sequences, which can be transformed...

The problem of estimating relative time (or depth) shifts between two seismic images is ubiquitous in seismic data processing. This problem is especially difficult where shifts are large and vary rapidly with time and space, and where images are contaminated with noise. I propose a solution to this problem that is a simple extension of the classic dynamic time warping algorithm for speech recog...

Interpolation of missing seismic data (such as missing nearoffset data, gaps, etc.) is an important issue in seismic surveys. Here we show that interferometry can be used to fill in some gaps in the data. The interferometric method creates virtual traces in the gaps by crosscorrelation of traces in a shot gather followed by summation over all shot positions. Compared to other interpolation meth...

six different Wavelet based Image Compression techniques are analyzed. The techniques involved in the comparison process are Embedded Zero tree Wavelet (ezw) , Set Partitioning In Hierarchical Trees (Spiht), Spatialorientation Tree Wavelet (stw), Wavelet Difference Reduction (wdr), Adaptively Scanned Wavelet Difference Reduction (aswdr) and Spiht_3d. Here, there are six types of Wavelet transfo...

In this paper, an angle of arrival (AOA) estimator is presented. Accurate AOA estimation is very crucial for many applications such as wireless positioning and signal enhancement using space processing techniques. The proposed estimator is based upon applying the eigenvalue decomposition (EVD) method on the crosscorrelation matrix of the received signals at two sides of the antenna array double...

Numerous functional magnetic resonance imaging (fMRI) data analysis strategies have been used by different laboratories to enhance the detection of brain activation. A consensus has not been achieved regarding the relative statistical power of different strategies. In this report, we compared several commonly-used data analysis strategies for conventional (nonechoplanar imaging) fMRI data by ev...