[hts-users:00220] Re: about delta

["Heiga ZEN (Byung Ha CHUN)" <zen@xxxxxxxxxxxxxxxx>]

Hi,

liulei_198216@xxxxxxxxxxx wrote:

> About the definition of Delta^(n) C_t ,
> there are two parameters L(n) and w(i).
>  
> What is the meanings of them.

First of all, please read the paper carefully, I think definitions of all of them are written in the paper.
L_{-,+}(n) is the window length of the n-th dynamic feature and w^n(i) is the i-th regression window coefficient to 
calculate the n-th dynamic feature.

For example,

\Delta   c_t = 0.5*c_{t+1} - 0.5*c_{t-1} => L_{-}(1)=1, L_{+}(1)=1, w^{1}(-1)=-0.5, w^{1}(0)=0.0,  w^{1}(1)=0.5
\Delta^2 c_t = c_{t+1} - 2*c_t + c_{t-1} => L_{-}(1)=1, L_{+}(1)=1, w^{1}(-1)=1.0,  w^{1}(0)=-2.0, w^{1}(1)=1.0


Best regards,

Heiga Zen (Byung Ha Chun)

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 Heiga ZEN     (in Japanese pronunciation)
 Byung Ha CHUN (in Korean pronunciation)

 Department of Computer Science and Engineering
 Nagoya Institute of Technology
 Gokiso-cho, Showa-ku, Nagoya 466-8555 Japan

 http://kt-lab.ics.nitech.ac.jp/~zen
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