-- QiongHu - 05 Dec 2012

 *For 05.12.12 Meeting* 

Figure

• Unwarped
  • Unwarped spectrum using SPTK: unwarp_sptk.png
  • Unwarped spectrum using Straight: unwarp_straight.png

• Warped
  • Warped spectrum using SPTK using different regulation value:
    • langda=1*exp(-4): warp_sptk_1xexp_-4.png
    • langda=0.01*exp(-4): warp_sptk_0.01xexp_-4.png
    • langda=0.1*exp(-4): warp_sptk_0.1xexp_-4.png
    • langda=0.1*exp(-4) for another frame: otherframe_warp_sptk_0.1xexp_-4.png
  • Warped spectrum using Straight:
    • langda=0.1*exp(-4): warp_straight_0.1xexp_-4.png
  • Compare Warped reconstruted spectrum for three different ones using Straight:
    • original spectrum using Straight, reconstructed spectrum using straight, spectrum using staight command mgc2sp: compare.png

Problem

1. for unwarped one using sptk, as it is pitch synchronous for one frame, the harmonious selection is not good.
2. choose the optimal langda is a problem. Here it is 0.1*exp(-4) not 2*exp(-4)
3. Whether regulation langda is speaker dependent is still a problem
4. whether the shift of the reconstruted figure is reasonable.
5. for unvoiced frame ???????