You are not allowed to add pages
Direct Link
User Tools
Sidebar
library:audio:prefilter
Table of Contents
预滤波
1. Pre-emphasis And De-emphasis
y(n) = x(n)-a*x(n-1) y(n) = x(n) + a*x(n-1) a = 0.9~1.0，(speex为:0.98)
2. 直流陷波
y(n) = x(n) - 2*x(n-1) + x(n-2) + 1.964 * y(n-1) - 0.964 * y(n-2)
H(z) = G*(1 - 2 * z-1 + z-2) / (1 - 1.964*z-1 + 0.964*z-2)
G = 0.9(Fs<12k) / 0.982(fs<24k) / 0.992(fs>24k)
library/audio/prefilter.txt · Last modified: 2022/05/02 00:32 (external edit)
Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Share Alike 4.0 International
