DOI:
https://doi.org/10.14483/22484728.7867Publicado:
2014-06-30Número:
Vol. 8 Núm. 1 (2014)Sección:
Visión de CasoMDS codec evaluation based on perceptual sound attributes
Palabras clave:
Psychometric method, Similarity Rating, Psychoacoustic attributes Sharpness, Roughness, Fluctuation Strength, and Multidimensional Scaling (MDS). (es).Descargas
Resumen (es)
The present paper deals with the subjective evaluation of audio coding technologies using the “Similarity Rating” psychometric method. Compressed audio excerpts are presented to a group of experienced listeners by pairs of stimuli. Each pair represents a different type of distortion, with compression included. These types of distortion correspond to three psychoacoustic attributes, sharpness, roughness, and fluctuation strength. Listener’s task is to evaluate the degree of similarity between the pairs. The final output is the localization of each measured codec in this psychoacoustic space. Multidimensional scaling is the statistic technique, belonging to Multivariate Statistical methods, which allows processing the results obtained from this method.
Referencias
ITU-R 1116-1 Recommendation, “Methods for the subjective assessment of small impairments in audio systems including multichannel sound systems”, 1994-1997.
F. Zwicker, "Psychoacoustics: Facts and Models", Springer, 1990.
University of Salford Manchester, “Sound quality making products sound better”. Available in: http://www.acoustics.salford.ac.uk/research/arc/cox/sound_quality/html.
I. Org, P.J.F. Groenen,“Modern Multidimensional Scaling, Theory and Applications”. New York: Springer,Second Edition, 2007.
P. Hebak,. et al, "Vícerozmêrné statistické metody 2", Vícerozmêrné statistické metody, Informatorium, 2005.
M. Herrera, "Summary of the subjective evaluation of audio-coding testing at the CVUT during the period 2003-2005". In XI International Symposium of audio and video. Krakov (Poland), 2005.
A. Melka, "Zaklady experimentalnipsychoakustiky". HAMU, 2005.
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