This paper describes an adaptive multi-rate wideband (AMR-WB) speech codcc proposcd for the GSM system and also for the evolving Third Generation (3G) mobile speech services. The speech codec is based on SB-CELP (Splitband-Code-Excited Linear Prediction) with five modes operating bit rates from 24kbit/s down to S.lkbit/s. The respective channel coding schemes are based on RSC (Recursive Systema...

As moderate-scale multiprocessors become widely used, we foresee an increased demand for eeective compiler parallelization and eecient management of parallelism. While parallelizing compilers are achieving success at identifying parallelism, they are less adept at predetermining the degree of parallelism in diierent program phases. Thus, a compiler-parallelized application may execute on more p...

Classification of objects in computer vision is done mostly without any knowledge about multiple class memberships. In this master thesis several learning algorithms based on Support Vector Machines and similar approaches regarding multiple class memberships are explored. Recognition performance and robustness of the algorithms are tested with small quantities of training objects, making all le...

Volumetric and page oriented optical storage systems have a great potential for high data density and high speed through page oriented data access [1]. However, in order to be practical, they have to maintain data integrity using error correction and modulation codes. The coding comes at a cost of spatial overhead of codeword size over the source data size, and processing time overhead for enco...

Dynamic optimization presents opportunities for finding run-time bottlenecks and deploying optimizations in statically compiled programs. In this paper, we discuss our current implementation of our hardware sampling based dynamic optimization framework and applying our dynamic optimization system to various SPEC2000 benchmarks compiled with the ORC compiler at optimization level O2 and executed...

A robust second order, shock-capturing numerical scheme for multi-dimensional special relativistic magnetohydrodynamics on computational domains with adaptive mesh refinement is presented. The base solver is a total variation diminishing Lax-Friedrichs scheme in a finite volume setting and is combined with a diffusive approach for controlling magnetic monopole errors. The consistency between th...

We have developed a simulation code with the techniques which enhance both spatial and time resolution of the PM method for which the spatial resolution is restricted by the spacing of structured mesh. The adaptive mesh refinement (AMR) technique subdivides the cells which satisfy the refinement criterion recursively. The hierarchical meshes are maintained by the special data structure and are ...

entropy coding, tree codes, adaptive coding This report presents an introduction to efficient adaptive compression using parameterized prefix codes. Advanced adaptive coding techniques can be quite complex because of the need to reliably estimate the probability of a large number of data symbols, each in a number of coding contexts, and then create the codes for each context, and finally code t...