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The method presented in this paper uses evolutionary computations to analog circuit testing stimulus shape optimization. The proposed testing excitation is a PWL waveform that generates responses of the tested circuit with appropriate relationship between current values of its specifications and the value of the observed parameter. The energy of error signal between nominal and actually obtained responses...
We investigate relation between the well-known reduced rank Wiener filter (RR-MMSE) and the recently proposed stochastic MV-PURE estimator. We show that, for a white input random vector, the forms of stochastic MV-PURE estimator and RR-MMSE filter are very similar. We also provide conditions, upon which the stochastic MV-PURE and RR-MMSE coincide. Moreover, we demonstrate that the MV-PURE estimator,...
In this paper we describe architecture for H.264/AVC video decoder. This architecture exploits NoC (network-on-chip) for data transport between decoder blocks and is optimized for efficient processing, simple data flow and management. Proposed solution enables flexible device structure configuration and supports testing and verification environments. The presented original architecture is general...
In this paper we study the mixed fractional Brownian motion and some related questions of its application to computer network traffic modeling. We show some of its basic properties, the method of its sample paths simulation and the estimation of the parameters. The effectiveness of both simulation method and estimation procedure are proved by Monte Carlo simulation.
The article presents a study of virtual sound source localization errors with the use of personalized head related transfer functions (HRTFs) in light of design of an electronic travel aid for the blind. The proposed device for aiding visually disabled individuals in independent mobility requires presentation of spatial sounds, which lead to the need to construct a system for efficient individual...
Computer analysis of high-speed videoendoscopy (HSV) recordings is becoming increasingly useful in functional evaluation of vocal fold pathology. In this work we present two new approaches for the vocal fold HSV-based analysis that have not been previously reported. First, segmentation of vocal fold edges is performed in our method using the level set algorithm. Second, having two vocal fold contours...
Recently, medical imaging has increased its importance greatly in picture archiving & communication (PACS). Many current compression schemes provide a very high compression rate but with considerable loss of quality. On the other hand, in some areas of image processing, in particular medical images, it may be sufficient to maintain high image quality only in the region of interest, i.e., in diagnostically...
In the paper a lossless image coding method intended for real-time hardware intra-frame video coding system is described. Data modeling stage of the method is based on predictor blending idea, the following entropy coding stage is realized as an advanced adaptive context arithmetic coder. The stages can be separated by a quantizer, in which case the coder is becoming a near-lossless one. Experiments...
This article analyzes performance of various 2D wavelet transform implementations based on the lifting scheme for the CDF 9/7 filterbank with respect to the modern and most recent CPU architectures. We propose three methods combining different approaches to memory locality handling and parallelism, which is obtained using Intel Threading Building Blocks developer libraries. Implementations were tested...
Analysis approach for detection of specific objects in noisy grayscale digital images is described. It is based on calculation of specific coefficients revealing covariance properties of overlapping fragments of pre-processed images. The approach is aimed at detection of rather small foreign objects over the background of larger ones. Before the actual analysis, pre-processing of the images based...
Two different approaches exist to implement the resonators needed by a switched-capacitor (SC) bandpass modulator. Both methods use a negative feedback loop around two elements. In the first approach, these elements are SC integrators, and, in the other approach, they are implemented with SC delay cells. In this paper, the impact of nonideal circuit behavior, finite opamp gain, finite unity-gain bandwidth,...
In this paper, we present the design and the implementation of an IEEE 754-compliant floating-point adder with three inputs. The design is based on a 4-level pipeline stage in order to distribute the critical paths and to maximize the performance. We examine the data dependencies to minimize the number of the pipeline stages. The design is customizable to support various floating-point formats, including...
The present work presented the design of neuronal circuit and programmable inverter circuit used for design of soft-hardware-logic circuit that represents Boolean functions just configuring external signals fabrication in silicon CMOS technology based in floating gate transistor, also present the simulation of SHL and characteristic the programmable inverter. The simulations were done using PSpice,...
This paper is devoted to investigations into static and dynamic energy consumption of digital CMOS VLSI systems. The analyses are performed for currently available technologies as well as the predictive ones and cover technologies from 32 nm to 3 mum. Next, the formula that describes the ratio of static versus dynamic parts of energy consumption is proposed and further analyses for technology scaling...
A novel low-power and high-performance sample-and-hold (S/H) front-end suitable for pipelined and cyclic analog-to-digital converters using 0.25-mum CMOS technology is proposed. This sampler uses a new S/H architecture exploiting a switched telescopic cascode operational transconductance amplifier (OTA) to minimize power consumption. Simulation results show that the proposed solution allows simple...
Enormous progress has been made in the area of human language technologies over the last few decades. Originally starting with simple systems that could recognize numbers spoken in isolation, researchers can now accurately recognize fluent conversational speech and automatically translate from one language to another. While many challenges still remain, complex systems can now be built from these...
A novel methodology that improves the computation rate of the 2-D discrete cosine transform (DCT) is proposed in this paper. By applying a new image decomposition scheme the image slice representation (ISR) followed by the image block representation (IBR) method, any gray-scale image can be described by a set of pixel blocks having certain intensity values. Based on this image representation, the...
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