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专利名称：Frequency compensation for perceptual
speech analysis
发明人：John Gerard Beerends申请号：US11663138申请日：20050920公开号：US08014999B2公开日：20110906
专利附图：
摘要：The invention provides a softscaled frequency compensation function thatallows the evaluation of a first quality measure indicating a global impact of alldistortions in an audio transmission system, including linear frequency response
distortions and second quality measure that only lakes into account the impact of linearfrequency response distortions. The softscaled frequency compensation function isderived from a softscaled ratio between a time integrated output and a time integratedinput power density functions. The first quality measure is derived from the differenceloudness density function as function of time and frequency, using the frequencycompensated input loudness density function and the gain compensated outputloudness density function both as a function of time and frequency, in the same manneras carried out in ITU standard P.862. The second measure is established from a differenceloudness density function as function of frequency only that is derived from a timeintegration of a second frequency compensated input loudness density function and thegain compensated output loudness density function both as a function of time andfrequency.
申请人：John Gerard Beerends
地址：Hengstdijk NL
国籍：NL
代理机构：Michaelson & Associates
代理人：Peter L. Michaelson,Brian K. Johnson
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