Scientific Papers about NU-Tech

Find listed here all the scientific papers dealing with NU-Tech.

Let us know if you have used NU-Tech in your research to show your scientific results, for example.


Conference: 128th AES Convention, May 2010 - London, UK

Abstract: In this paper we present a novel implementation of a Wave Field Synthesis application based on emerging NVIDIA Compute Unified Device Architecture (CUDA) technology using NU-Tech Framework. CUDA technology unlocks the processing power of the Graphics Processing Units (GPUs) that are characterized by a highly parallel architecture. A wide range of complex algorithms are being re-written in order to benefit from this new approach. Wave Filed Synthesis is a quite new spatial audio rendering technique highly demanding in terms of computational power. We present here results and comparisons between a NU-Tech Plug-In (NUTS) implementing real-time WFS using CUDA libraries and the same algorithm implemented using Intel Integrated Primitives (IPP) Library.


Conference: 36th AES International Conference - Sound in Motion, June 2-4, 2009 Dearborn, Michigan, USA

Abstract: In the last decade Car Infotainment Systems (CIS) have been gaining great attention by the scientific and industrial community: in this context, within the Euro- pean hArtes Project, an advanced CIS (ACIS) has been designed. The system offers several functionali- ties employing professional audio equipment and PCs able to manage different I/O audio channels and to provide a large computing capability for complex audio algorithms. The overall architecture is based on NU-Tech platform that manages the whole system from professional equipment to audio streaming and processing. The system has been therefore devised as a real audio laboratory (hArtes CarLab) for audio algorithm exploration and validation, providing a remote access to all the system functionalities. In this paper starting from the hardware description, a com- plete set of algorithms to enhance audio reproduction, hands-free communication, and interactivity through speaker and speech recognition features is discussed in relation to the NU-Tech framework.


Conference: 2009 IEEE International Conference on Networking, Sensing and Control - Okayama City, Japan, March 26-29, 2009

Abstract: NU-Tech framework is a powerful Digital Signal Processing tool for algorithms developing. Its main advantage is to give the user a set of high level functions which make easier and faster the development of an application from scratch. As an example an advanced Car Infotainment System platform, composed by several physical systems and able to manage different computational demanding applications, based on a Client-Server architecture is here presented.


Conference: The First Annual International Symposium on Vehicular Computing Systems - 22nd - 24th July 2008 - Dublin, Ireland

Abstract: The need for an Advanced Car Information System has been recently emerging, able to handle issues left open by CIS systems already on the market, and to overcome their limitations. In the hArtes framework an innovative approach is proposed, based on a general purpose Operating System with support for human interface and advanced Remote Application Control (RAC) following a client-server paradigm, and (sub)systems implementing specific demanding functions. In this context, an auxiliary system, whose interfacing software is derived from Nu-Tech DSP platform, is able to run computational-demanding applications using specialized hardware and software, offering remote control through the RAC model. The proposed architecture shows several advantages, such as increased flexibility, ease of integration with personal devices, software and hardware (individually replaceable modules) upgradability.


Conference: 124th AES Convention 2008 May 17-20 Amsterdam, The Netherlands

Abstract: The aim of the hArtes project is to facilitate and automate the rapid design and development of heteroge- neous embedded systems, targeting a combination of a general purpose embedded processor, digital signal processing and reconfigurable hardware. In this paper, we present the NU-Tech platform, the main entry tool from the hArtes toolchain, which has the role of assisting the designers in tuning and possibly improve the input algorithm at the highest level of abstraction. A brief description of the project itself will be given and its vocation to audio highlighted through a case study application.


Conference: 124th AES Convention 2008 May 17-20 Amsterdam, The Netherlands

Abstract: In the field of immersive audio, crosstalk canceller is required when a virtual sound is rendered over two loudspeakers. In the last decade several adaptive algorithms have been proposed: nowadays the least square (LMS) algorithm seems to be the best compromise between simplicity and robustness although its convergence is weak for colored inputs. In this work a new approach to crosstalk cancellation based on a sub-band adaptive algorithm will be derived. The effectiveness of this algorithm, considering colored input, will be presented in terms of matrix inversion quality and fast convergence rate comparing it with the conventional LMS algorithm.


Conference: 123th AES Convention, New York, NY, USA, 2007 October 5-8

Abstract: Fixed frequency response audio equalization has well-known problems due to algorithms computational complexity and to the filters design techniques. This paper describes the design and the real time implementation of a M-band linear phase digital audio equalizer. Beginning from multirate systems and filter banks, an innovative uniform and non uniform bands audio equalizer is derived. The idea of this work arises from different approaches employed in filter banks to avoid aliasing in the case of adaptive filtering in each band. The effectiveness of the real time implementation is shown comparing it with an equalizer based on frequency domain technique. The solution presented here has several advantages in terms of low computational complexity, low delay and uniform frequency response avoiding ripple between adjacent bands.


Conference: 123th AES Convention, New York, NY, USA, 2007 October 5-8

Abstract: Crossover networks are crucial components of audio reproduction systems and therefore they have received great attention in literature. In this paper, the design and implementation of a digital crossover will be presented. A mixed FIR/IIR solution has been explored in order to exploit the respective strengths of FIR and IIR realizations, aiming at designing a low delay, low complexity, easily extendible, approximately linear phase crossover network. A software real-time implementation for the Nu-Tech platform of the proposed system will be shown. Practical tests have been carried out to evaluate the performance of the proposed approach.


Conference: 118th AES Convention, Barcelona, Spain, 2005 May 28-31

Abstract: This work presents a novel software platform called NU-Tech to implement real-time DSP algorithms in multi-channel scenarios. Running on a common PC, the overall framework is based on a plug-in architecture, allowing the user to connect specific blocks, operating as DSP algorithms, within the available graphical design environment. These blocks, namely NUTs’ (NU-Tech Satellites), have to be previously written in C++. A strict control over latency times is insured by a proper interface to the hardware layer of the PC sound card. It turns out that NU-Tech is well suited for development, real-time debugging and fine tuning of DSP algorithms. As further application, it fulfils the role of DSP operating core of new stand-alone programs preventing the user to develop them from scratch. Some examples are provided to show the effectiveness of the idea.


©2005 Leaff Engineering Leaff Engineering
 
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