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In Reply to: the big difference posted by tunenut on November 25, 2005 at 15:45:35:
not correct. sigma delta modulation generates quantization noise throughout the whole frequency spectrum. noise shaping in the converter then determines where to shift this noise. so your explanation is overly simplistic.*** Presumably, this high frequency signal is audibly important, otherwise why would it be designed into the system. ***
I think you presume too much. From what I've read, Sony/Philips seems to be implying that the advantage of DSD is the avoidance of decimation filter in the A/D stage, and the avoidance of oversampling or brick wall filters in the D/A stage. As far as I know, no one has conclusively proven that reproduction of frequencies beyond the range of human hearing has any benefit. Indeed, many experiments, both formal and informal, suggest otherwise (for example, read Griesinger's article).
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Follow Ups
- Re: the big difference - Christine Tham 18:41:35 11/28/05 (2)
- Tunenut is on the right track.. - Frank.. 00:08:56 11/29/05 (1)
- The question is: are *you* on the "right track"? (nt) - Christine Tham 19:37:42 11/30/05 (0)
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