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
>>
>>
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