What can be the cause of getting so large values of components after ifft and deframing? ?

1 次查看（过去 30 天）
kalpana joshi
kalpana joshi 2020-5-29
回答： Vaibhav Tomar 2020-5-31
1)I'm working on speech frames.
Took 512 point fft of each frame.To process them further ,i took (N/2)+1 fft components of each frame making the very first component of each frame zero to reduce dc bias?
After processing the fft components separately as real and imaginary,i see that the real and imaginary parts are quite small.
But when i take ifft and do defaming the component values are quite high.It makes the time domain recovered speech signal too loud and also seg SNR too small. In output spectrogram frequencies above 1.5khz are not seen but also noise is not there,pesq good but very low segSNR.
What can be the cause of getting so large values of components after ifft and deframing? ?
  1 个评论
David Goodmanson
David Goodmanson 2020-5-29
Hi kalpana,
it sounds like you are taking the 257 nonnegative frequency components. What is the nature of the processing you are doing, and after that how do you get back to 512 points in the time domain?

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Vaibhav Tomar
Vaibhav Tomar 2020-5-31
Hey Kalpana,
Wanted to ask a few things.
It would greatly help if you could provide some information regarding the processing that you are doing and the steps followed to get back to the 512 points in the time domain.
Thanks

类别

在 Help Center 和 File Exchange 中查找有关 Measurements and Spatial Audio 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by