Displaying 1 result from an estimated 1 matches for "204us".
Did you mean:
204s
2008 May 28
2
FFT Resampler
...ks in floating point only, and only basic quality
inspection has been done.
Some benchmarks comparing the filter-based resampler at Q3 with the FFT
resampler with overlap = in_len / 2, using 20ms chunks of data. (-O3
-ffast-math, FFTW3, gcc 4.3.0 on x86_64)
16=>48: 59us vs 19us
16=>44.1: 204us vs 34us
16=>8: 13us vs 7us
48=>8: 32us vs 16us
This is actually much faster than I expected.
With -O3, the overhead of copying, applying window etc is 20%. With all
options, the overhead sinks to 10%.
I've done listening tests when converting wb_male.wav to 44.1, 48 and
8khz, and the...