Refine my results

Document type

Institution

Specific Collection

Language

Université de Neuchâtel

An Algorithm for Fast Direct Calculation of Quantized LSP Parameters

Grassi, Sara ; Ansorge, Michael ; Pellandini, Fausto

In: Proceedings of the Fifth Bayona Workshop on Emerging Technologies in Telecommunications (COST 254), 1999, p. 158-162

Line Spectrum Pairs (LSP) are commonly used in speech coding for spectral quantization. Usually, the LSPs are first calculated, and then quantized. When scalar quantization is used, computational saving can be achieved by direct calculation of the quantized LSPs, searching zero-crossings on the grid formed by the values of the quantization tables (quantized-domain search). In a previous...

Université de Neuchâtel

Application of Kalman filtering to noisereduction on microsensor signals = Application de filtres de Kalman à la réduction de bruitde microcapteurs

Marselli, Catherine ; Daudet, D. ; Amann, Hans Peter ; Pellandini, Fausto

In: Proceedings du Colloque interdisciplinaire en instrumentation, C2I, 18-19 novembre 98, pp. 443-450, 1998, p. 443-450

Due to their low cost and small size, microsensors are of great interest for many applications. However, few are as accurate than their classical forerunners so that their output signals must be corrected. The present research work focuses on an error correction system designed to eliminate perturbations that are random in character. Provided they can be modelled, Kalman filters are well suited:...

Université de Neuchâtel

Macro-programmable DSP architecture for parallel/pipelined data pathunits, targeted for FFT based algorithms

Drollinger, Andreas ; Heubi, Alexandre ; Balsiger, Peter ; Pellandini, Fausto

In: Proceedings of the International Conference on Signal Processing, Applications and Technology (ICSPAT), 2000, p. 1-5

A macro-programmable DSP architecture is presented, which is very well situated for the implementation of algorithms with regular data flow graphs, like FFTs. A smart grouping of the algorithm together with the macrocode concept reduce drastically the control and address generation overhead of the DSP and shorten the computation time. This is finally manifested in very low-power consumption,...

Université de Neuchâtel

ASIC DSP compiler for optimized synthesis

Drollinger, Andreas ; Heubi, Alexandre ; Balsiger, Peter ; Pellandini, Fausto

In: Proceedings of the International Conference on Signal Processing, Applications and Technology (ICSPAT), 2000, p. 1-5

This paper presents a high level DSP architecture compiler for cycle-constrained filters and datapath applications. The tool offers an easy way to get, from an equation representation of a filter, a synthetisable VHLD description of an application specific DSP architecture. Inputs of the DSP compiler are an equation file to define the filter structure and a resource definition file to specify the...

Université de Neuchâtel

Micro Power High-Resolution A/D Converter

Robert, Christian ; Grisoni, L. ; Heubi, Alexandre ; Balsiger, Peter ; Pellandini, Fausto

In: Proceedings of the International Conference on Signal Processing, Applications and Technology (ICSPAT), 1999, p. 1-5

Micro power converters are required for power sensitive, battery-operated devices. Keeping this goal in mind IMTdeveloped a 13-bit RSD cyclic converter. However, inaccuracies (capacitor mis-match, operation amplifier...) resulted in a relative precision behaviour. The implementation of a correction algorithm in a 2μm CMOS technology is presented. It requires 1 mm2 and simulations show...

Université de Neuchâtel

Micro-Power 14-bit RSD A/D Converter

Grisoni, L. ; Heubi, Alexandre ; Balsiger, Peter ; Pellandini, Fausto

In: Proceedings of the International Conference on Signal Processing, Applications and Technology (ICSPAT), 1996, p. 1-5

Micro power converters are required for power sensitive, battery-operated devices. Keeping this goal in mind IMTdeveloped a 13-bit RSD cyclic converter. However, inaccuracies (capacitor mis-match, operation amplifier...) resulted in a relative precision behaviour. The implementation of a correction algorithm in a 2μm CMOS technology is presented. It requires 1 mm2 and simulations show...

Université de Neuchâtel

Micropower 'Relative Precision' 15 bit A/D Converter

Grisoni, L. ; Heubi, Alexandre ; Grassi, Sara ; Balsiger, Peter ; Pellandini, Fausto

In: Proceedings of the International Conference on Signal Processing, Applications and Technology (ICSPAT), 1995, p. 420-424

State of the art A/D converters are still critical in power-sensitive, battery-operated equipment like hearing aids. In this article, a new approach is presented that features excellent signal quality, 85 dB dynamic range equivalent to a 15-bit output word, 16 kHz sampling rate, 25 μW power consumption, and 0.54 mm2 chip area. Compared to standard components, the enormous power...

Université de Neuchâtel

Design on Lattice Wave Digital Filters in SPW Environment

Grisoni, L. ; Ansorge, Michael ; Pellandini, Fausto

In: Proceedings of the International Conference on Signal Processing, Applications and Technology (ICSPAT), 1993, p. 311-319

Lattice Wave Digital Filters (LWDFs) are known to be insensitive to finite precision arithmetic effects and can readily be designed for standard filtering applications using a set of explicit formulas elaborated by Gazsi. This paper presents the necessary elements to develop an LWDF design package within the Signal Processing Workstation (SPW) design framework. This package, based on Gazsi's...

Université de Neuchâtel

Error Correction Applied to Microsensors in a Navigation Application

Marselli, Catherine ; Amann, Hans Peter ; Pellandini, Fausto

In: Proceedings of the 1st Europe-Asia Congress on Metatronics, 1996, p. 650-655

The inertial microsensors might bean interesting complement in automotive land navigation. However, they have low accuracy and the principle of inertial navigation make the sensor's errors to accumulate, leading to unacceptable results. In this work, we are interested in the design of a strong signal processing system for error correction. We work on a strapdown configuration with low-cost...

Université de Neuchâtel

System-Level Simulation Using Mixed-Nature Models

Boegli, Alexis ; Moser, Vincent ; Amann, Hans Peter ; Pellandini, Fausto ; Romanowicz, Bart ; Lerch, Philippe ; Laudon, Matthew ; Renaud, Philippe

In: Proceedings of the 1st Europe-Asia Congress on Metatronics, 1996, p. 12-17

Miniaturized, integrated sensors and actuaturs are more and more used in microsystem applications. In order to promote their use further, specialists must make them more accessible to System designers. This can be done through behavioral modeling of sensors and actuators. The resulting models can be used in conjunction with models of the associated electronics to simulate a complete microsystem....