On Wed, 08 Jun 2016 21:42:45 +0200, han.lu@xxxxxxxxx wrote: > > From: "Lu, Han" <han.lu@xxxxxxxxx> > > Add noise detection for alsabat. > Alsabat reports error when noise above threshold be detected. > Use either of the options below to designate the threshold. (e.g. > if the ratio of noise to signal is 5%, the snr is about 26dB.) > --snr-db <value in dB> > --snr-pc <value in %> > > The noise detection is performed in time domain. On each period > of the sine wave being analyzed, alsabat substracts a clean sine > wave from the source, calculates the RMS value of the residual, > and compares the result with the threshold. At last, alsabat > returns the number of periods with noise above threshold. 0 is > returned when the source is clean. > > patch content: > 1. align the data type and process on float > 2. add a parameter for adjust_waveform() > 3. add a single channel sine wave generator > 4. add noise detection > > Lu, Han (4): > alsabat: align the data type on float > alsabat: add channels parameter for adjust_waveform() > alsabat: add a single channel sine wave generator > alsabat: add noise detection Applied all patches now. Thanks. Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
