A methodology for top-down design of digital signal processing systems is described. The top-down design process can be viewed as a model which outlines the key steps necessary for successfully mapping an algorithm to implementation. A design exercise is detailed to illustrate how the top-down design process is applied. The discrete wavelet transform is mapped from the algorithm to an architect...

XML is increasingly used not only for data exchange but also to represent arbitrary data sources as virtual XML repositories. In many application scenarios, fragments of such repositories are distributed over the Web. However, design and query processing models for distributed XML data have not yet been studied in detail. The goal of this paper is to study the design and management of distribut...

In this chapter, the authors present a systematic statistical analysis of cavity ring-down signal extraction. The traditional uncorrelated least squares fit can be generalized to the situation with data correlation (e.g. caused by data filtering, which is essential to minimize noise). If the data is sufficiently highly sampled, the effect of the data correlation can be included by introducing a...

Classical theories assume that unconscious automatic processes are autonomous and independent of higher-level cognitive influences. In contrast, we propose that automatic processing depends on a specific configuration of the cognitive system by top-down control. In 2 experiments, we tested the influence of available attentional resources and previously activated task sets on masked semantic pri...

All sound separation systems based on perception assume a bottom-up or Marr-like view of the world. Sound is processed by a cochlear model, passed to an analysis system, grouped into objects, and then passed to higher level processing systems. The information flow is strictly bottom up, with no information flowing down from higher level expectations. Is this the right approach? This paper summa...