Method and System for Speech Intelligibility Measurement of an Audio Transmission System
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United States of America Patent
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Issued Date -
Aug 19, 2010
app pub date -
Oct 6, 2008
filing date -
Oct 11, 2007
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Abandoned
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Abstract
Method and processing system for measuring the intelligibility of a degraded output signal (Y(t)) from an audio transmission system (10) in response to a reference input signal (X(t)). A measurement device (11) is arranged for outputting a measure (I) for the speech intelligibility of the output signal (Y(t)). The measurement device (11) executes processing of the input signal (X(t)) and output signal (Y(t)) to obtain a disturbance density function (D(f).sub.n). The disturbance density function (D(f).sub.n) is corrected by multiplying it with a correction function for each frame derived from a correlation calculation of the compensated pitch power densities (PPX'(f).sub.n) associated with the input signal (X(t)) of a present frame (n) and an independent previous frame (n-2). The corrected disturbance density function (D'(f).sub.n) is aggregated over frequency and time to obtain a measure (I) for the speech intelligibility of the output signal (Y(t)).
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