Am Samstag, den 22.10.2016, 23:25 +0100 schrieb Bernd Porr: (...)
> I'm not too crazy about proper FIR filters in JAVA because even in > C++ > they are just too slow and one would need to write them as JNI calls > to > C to make them run fast enough (for example a 50Hz notch for ECG at > 1kHz > requires 500taps at a bandwidth of 4Hz -- in theory!). Not sure how > excited people here are about C/JNI calls. However the FIR filter > _design_ = creating an impulse response is useful for a-causal > offline > computation using the convolution operation (but the 1D convolution > is > already implemented isn't it?). If the Just In Time compiler of the runtime kicks in, it will go fast... You can avoid wrapper code (get|set) and access the fields directly - ist will improve speed even more. Here is an example of a java filtering (converted form the signalprocessing package of octave) I did a couple of years ago: https://sourceforge.net/projects/dsp4 (...) Arne --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
