Itakura-Saito Distance
From Wikipedia, the free encyclopedia
The Itakura-Saito Distance is a measure of the perceptual difference between an original spectrum P(ω) and an approximation 
of that spectrum. It was proposed by Fumitada Itakura and Shuzo Saito in the 1970s while they were with NTT.
The distance is defined as:
![D_{IS}(P(\omega),\hat{P}(\omega))=\frac{1}{2\pi}\int_{-\pi}^{\pi} \left[ \frac{P(\omega)}{\hat{P}(\omega)}-\log \frac{P(\omega)}{\hat{P}(\omega)} - 1 \right] d\omega](../../../../math/3/0/1/301700b09df3f9f7f420a4dfc5d5dc15.png)
It is worth noting that DIS(a,b) is not a true metric since it is not symmetric.
[edit] See also
 |
This computer-related article is a stub. You can help Wikipedia by expanding it. |
