On the vectorization of FIR filterbanks

This paper presents a vectorization technique to implement FIR filterbanks. The word vectorization, in the context of this work, refers to a strategy in which all iterative operations are replaced by equivalent vector and matrix operations. This approach allows that the increasing parallelism of the most recent computer processors and systems be properly explored. The vectorization techniques are applied to two kinds of FIR filterbanks (conventional and recursive), and are presented in such a way that they can be easily extended to any kind of FIR filterbanks. The vectorization approach is compared to other kinds of implementation that do not explore the parallelism, and also to a previous FIR filter vectorization approach. The tests were performed in Matlab and C, in order to explore different aspects of the proposed technique

On the Vectorization of FIR Filterbanks

This paper presents a vectorization technique to implement FIR filterbanks. The word vectorization, in the context of this work, refers to a strategy in which all iterative operations are replaced by equivalent vector and matrix operations. This approach allows that the increasing parallelism of the most recent computer processors and systems be properly explored. The vectorization techniques are applied to two kinds of FIR filterbanks (conventional and recursi ve), and are presented in such a way that they can be easily extended to any kind of FIR filterbanks. The vectorization approach is compared to other kinds of implementation that do not explore the parallelism, and also to a previous FIR filter vectorization approach. The tests were performed in Matlab and C, in order to explore different aspects of the proposed technique

A New Strategy For Objective Estimation Of The Quality Of Audio Signals [uma Nova Estratégia Para A Estimação Objetiva Da Qualidade De Sinais De áudio]

This paper presents a new strategy for assessment of audio signal quality. The resulting method, named Objective Measure of Audio Quality, includes some of the most effective features found in the current methods of audio assessment, as well new techniques resulting from the identification and study of the major limitations of such methods. The performance of the new strategy is compared to that one achieved by PEAQ (Perceptual Evaluation of Audio Quality), currently adopted as standard by International Telecommunication Union (ITU).23162167Thiede, T.V., Kabot, E., A New Perceptual Quality Measure for Bit Rate Reduced Audio (1996) Contribution to the 100th AES Convention, , preprint 4280, CopenhagenBrandenburg, K., Evaluation of Quality for Audio Encoding at Low Bit Rates (1987) Contribution to the 82nd AES Convention, , preprint 2433, LondonBeerends, J.G., Stemerdink, J.A., A Perceptual Audio Quality Measure Based on a Psychoacoustic Sound Representation (1992) J. Audio Eng. Soc., 40, pp. 963-978. , DecPaillard, B., Mabilleau, P., Morisette, S., Soumagne, J., Perceval: Perceptual Evaluation of the Quality of Audio Signals (1992) J. Audio Eng. Soc., 40, pp. 21-31. , JanColomes, C., Lever, M., Rault, J.B., Dehery, Y.F., A Perceptual Model Applied to Audio Bit-Rate Reduction (1995) J. Audio Eng. Soc., 43, pp. 233-240. , April(1998) Method for Objective Measurements of Perceived Audio Quality, , ITU-R Recommendation BS.1387-1Thiede, T.V., (1999) Perceptual Audio Quality Assessment Using a Non-Linear Filter Bank, , Ph.D. Thesis, Technical University of BerlinKohonen, T., (1997) Self-Organizing Maps, , 2nd Edition, SpringerBarbedo, J.G.A., Lopes, A., (2003) Medida Objetiva Da Qualidade de Áudio, , Relatório Técnico, Fapesp, julBarbedo, J.G.A., Lopes, A., (2004) On the Vectorization of FIR Filterbanks, , submitted to the EUSIPCOBarbedo, J.G.A., Lopes, A., (2004) On the Vectorization of IIR Filterbanks, , submitted to the EUSIPCOZwicker, E., Fastl, H., (1990) Psychoacoustics, Facts and Models, , Springer Verlag, BerlinBeerends, J.G., Van Den Brink, W.A.C., The Role of Informational Masking and Perceptual Streaming in the Measurement of Music Codec Quality (1996) Contribution to the 100th Convention of the Audio Engineering Society, , Preprint 4176, Copenhagen, MayHaykin, S., (1999) Neural Networks - A Comprehensive Foundation, , New Jersey: Prentice Hal