Device and method for signal quality determination

H - Electricity – 04 – R

Patent

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H04R 29/00 (2006.01)

Patent

CA 2273239

A device for determining the quality of an output signal to be generated by a signal processing circuit including a radio link with respect to a reference signal is provided with a first series circuit for receiving the output signal and with a second series circuit for receiving the reference signal and generates an objective quality signal by means of a combining circuit coupled to the two series circuits, whereby a scaling circuit is disposed between the two series circuits for scaling at least one series circuit signal. The poor correlation between said objective quality signal and a subjective quality signal to be assessed by human observers can be considerably improved by disposing a discounting arrangement inside the combining circuit, which discounting arrangement should be coupled to the scaling circuit for receiving a comparison signal and for discounting said comparison signal while generating the quality signal.

L'invention concerne un dispositif pour déterminer, par rapport à un signal de référence, la qualité d'un signal de sortie devant être généré par un circuit de traitement de signaux comprenant une liaison radioélectrique. Ce dispositif est pourvu d'un premier circuit série permettant de recevoir le signal de sortie et d'un deuxième circuit série recevant le signal de référence. Ce dispositif génère un signal de qualité objectif à l'aide d'un circuit de combinaison couplé aux deux circuits série. Un circuit de mise à l'échelle est placé entre les deux circuits série pour mettre à l'échelle au moins un signal du circuit série. La faible corrélation entre le signal de qualité objectif et un signal de qualité subjectif devant être évaluée par des observateurs humains peut être fortement améliorée en plaçant un système de réduction à l'intérieur du circuit de combinaison. Ce système de réduction doit être couplé au circuit d'échelonnement pour recevoir un signal de comparaison et pour réduire ce signal de comparaison tout en générant le signal de qualité.

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