diff options
| author | Sebastian Dröge <slomo@circular-chaos.org> | 2007-08-19 19:16:33 +0000 |
|---|---|---|
| committer | Sebastian Dröge <slomo@circular-chaos.org> | 2007-08-19 19:16:33 +0000 |
| commit | 45ac408d0abed030eaf8f84af031c0de86e5f5b0 (patch) | |
| tree | c644b922ff1ecbbc35046f2d9949429f1315eff2 /gst/audiofx | |
| parent | 5f32a4bac6f7f22f45ba2c999f14ba70784312af (diff) | |
gst/filter/: Add small comparision with the chebyshev filters in the docs.
Original commit message from CVS:
* gst/filter/gstbpwsinc.c:
* gst/filter/gstlpwsinc.c:
Add small comparision with the chebyshev filters in the docs.
Diffstat (limited to 'gst/audiofx')
| -rw-r--r-- | gst/audiofx/audiowsincband.c | 5 | ||||
| -rw-r--r-- | gst/audiofx/audiowsinclimit.c | 7 |
2 files changed, 10 insertions, 2 deletions
diff --git a/gst/audiofx/audiowsincband.c b/gst/audiofx/audiowsincband.c index 79fa39d9..bf399cbc 100644 --- a/gst/audiofx/audiowsincband.c +++ b/gst/audiofx/audiowsincband.c @@ -46,6 +46,11 @@ * controls rolloff and stopband attenuation. The Hamming window provides a faster rolloff but a bit * worse stopband attenuation, the other way around for the Blackman window. * </para> + * <para> + * This element has the advantage over the Chebyshev bandpass and bandreject filter that it has + * a much better rolloff when using a larger kernel size and almost linear phase. The only + * disadvantage is the much slower execution time with larger kernels. + * </para> * <title>Example launch line</title> * <para> * <programlisting> diff --git a/gst/audiofx/audiowsinclimit.c b/gst/audiofx/audiowsinclimit.c index 3cf14e5d..0db1a743 100644 --- a/gst/audiofx/audiowsinclimit.c +++ b/gst/audiofx/audiowsinclimit.c @@ -31,8 +31,6 @@ * is probably the bottleneck * - Maybe allow cascading the filter to get a better stopband attenuation. * Can be done by convolving a filter kernel with itself - * - Drop the first kernel_length/2 samples and append the same number of - * samples on EOS as the first few samples are essentialy zero. */ /** @@ -46,6 +44,11 @@ * controls rolloff and stopband attenuation. The Hamming window provides a faster rolloff but a bit * worse stopband attenuation, the other way around for the Blackman window. * </para> + * <para> + * This element has the advantage over the Chebyshev lowpass and highpass filter that it has + * a much better rolloff when using a larger kernel size and almost linear phase. The only + * disadvantage is the much slower execution time with larger kernels. + * </para> * <title>Example launch line</title> * <para> * <programlisting> |