Hi, to extended my own post: On 17.09.2016 01:13, Danilo Beuche wrote: > Hi, > > If the goal is to identify regressions, comparing the previously > generated output data to the output of the changed code is sufficient. > And for this we can simply compare the value by value difference since > beside rounding errors the output should be very close. For that a > simple value by value difference should be good enough. > Of course the assumption is that the output signal data is captured directly, i.e. not via an audio interface. E.g. freedv_rx / freedv_tx or similar approaches. Otherwise all sorts of timing errors may occur and frame identification is necessary. > For general work a quality check by comparing input and output > properties like Glen suggested would be nice. Danilo > > > Danilo > > Am 17.09.2016 um 07:53 schrieb glen english <g...@cortexrf.com.au > <mailto:g...@cortexrf.com.au>>: > >> My video compression work tells me we almost need something else rather >> than a bit for bit compares. >> >> something like a SN or difference merit >> >> Anyone familiar with video compression will understand this concept . >> We would do an encode- decode and then look at the RMS, peak, and >> various other stats difference between the input and output . >> >> The tools would line up / correlate the frames to get the compare >> occurring at the right temporal location. >> >> On 17/09 >> >> >> ------------------------------------------------------------------------------ >> _______________________________________________ >> Freetel-codec2 mailing list >> Freetel-codec2@lists.sourceforge.net >> <mailto:Freetel-codec2@lists.sourceforge.net> >> https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > > > ------------------------------------------------------------------------------ > > > _______________________________________________ > Freetel-codec2 mailing list > Freetel-codec2@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freetel-codec2
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