Anchor Signals Validation for Two Dimensions of a Four-Dimensional Perceptive Space.

Yves Zango (1, 2) , Régine Le Bouquin Jeannes (3) , Nathalie Costet (2) , Catherine Quinquis (1)

1 Orange Labs [Lannion]
2 LTSI - Laboratoire Traitement du Signal et de l'Image
3 LTSI - Laboratoire Traitement du Signal et de l'Image

The subjective assessment of speech and sound codecs requires anchor signals to ensure its reliability. The reference system currently used is Modulated Noise Reference Unit (MNRU) which simulates only quantization noise. Now, the new generations of codecs present other impairments. In this study, we consider speech quality as a multidimensional phenomenon and use dimensional reduction techniques to project codecs' impairments in a four dimensional space, each axis of the perceptive space corresponding to one of them. A verbalization test allowed characterizing two of these dimensions by the following attributes: "muffle" and "background noise" anchor signals were designed for these two dimensions, and a statistical analysis allowed validating the accuracy of at least one of these signals.

Domaines: Ingénierie biomédicale

Yves Zango, Régine Le Bouquin Jeannes, Nathalie Costet, Catherine Quinquis. Anchor Signals Validation for Two Dimensions of a Four-Dimensional Perceptive Space.. 130th AES Convention, May 2011, London, United Kingdom. p. ⟨hal-00908955⟩