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Jean-Mark sarkasm. Jean-Markasm. (Bonus points for providing an actual noisy WAV! ^_^) On 30/10/2017 20:28, Jean-Marc Valin wrote: Hi, Before I comment on the graphics you posted to visualize the difference between two audio signals, I'd like to ask for your help in evaluating my JPEG encoder. I've encoded an image wi...

...are many things you can do to an audio signal that are completely inaudible and yet will cause quite large differences (e.g. flip the sign or delay by X samples, but there's many more). Cheers, Jean-Marc On 10/30/2017 08:16 PM, Orestes Zoupanos wrote: > Jean-Mark sarkasm. > > Jean-Markasm. > > (Bonus points for providing an actual noisy WAV! ^_^) > > On 30/10/2017 20:28, Jean-Marc Valin wrote: >> Hi, >> >> Before I comment on the graphics you posted to visualize the difference >> between two audio signals, I'd like to ask for your help in ev...

Good morning. I've ran a test against MP3 format. Code: (first convert tested audio file to 16 bit 48khz with sox.exe if needed) lame.exe -b 320 48khzfilein.wav -o fileout.mp3 lame --decode fileout.mp3 -o fileout.mp3.wav opusenc.exe --bitrate 320 48khzfilein.wav fileout.opus opusdec.exe fileout.opus fileout.opus.wav wavdiff.exe 48khzfilein.wav fileout.mp3.wav -diff fileout.mp3.delta.wav

...are many things you can do to an audio signal that are completely inaudible and yet will cause quite large differences (e.g. flip the sign or delay by X samples, but there's many more). Cheers, Jean-Marc On 10/30/2017 08:16 PM, Orestes Zoupanos wrote: > Jean-Mark sarkasm. > > Jean-Markasm. > > (Bonus points for providing an actual noisy WAV! ^_^) > > On 30/10/2017 20:28, Jean-Marc Valin wrote: >> Hi, >> >> Before I comment on the graphics you posted to visualize the difference >> between two audio signals, I'd like to ask for your help in ev...