22906
100+ Head-Fier
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- Feb 24, 2005
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I think that graph is a great way to explain things. However, the point I am making is about the coding scheme, not about downsampling; it is about preserving the information present in the original audio signal.
Yes, we can filter the PDM signal to get different waveforms, and maybe 100 will be converted into something different from 001, but that filtering process is not adding real resolution to the signal; if the waveform that results from converting 100, 010, 001 is different, but still has nothing to do with the original audio waveform (rather it has to do with what kind of filter being applied), then its not audio-band information. It's like adding a special effect to the sound to make it seem clearer.
Additionally, delaying the signal is the same as changing the signal altogether. My intention is not to start an argument; thank you for your comments.
Yes, we can filter the PDM signal to get different waveforms, and maybe 100 will be converted into something different from 001, but that filtering process is not adding real resolution to the signal; if the waveform that results from converting 100, 010, 001 is different, but still has nothing to do with the original audio waveform (rather it has to do with what kind of filter being applied), then its not audio-band information. It's like adding a special effect to the sound to make it seem clearer.
Additionally, delaying the signal is the same as changing the signal altogether. My intention is not to start an argument; thank you for your comments.