DSD is more bit efficient that PCM. PCM like a celluloid movie frame, stores the immediately past signal status plus the new incremental change. DSD stores ONLY the change and references back to the original state via the series of changes.
A couple of interesting articles:
Archimago's Musings: MUSINGS: On SACD & DSD audio...
Archimago's Musings: MEASUREMENTS: PCM to DSD Upsampling Effects (JRiver MC19 Beta).
james
I didn't believe the hype for DSD, nor did I disbelieve it. I ran my own tests - with friends - and came to my own conclusions. DSD to me sounds meatier. Fuller. And most importantly, less digital sounding!
Do I think it will survive? Sadly, probably not. But I hope I'm wrong. Because as Jim (STILLONE) said, all they are doing is recycling the SOS on DSD now.
I am not wondering the manufacturers are quite happy with blu-ray. But it is too late. We know streaming now.Unfortunately, I agree with you Mike. Despite Sony opening up their vault of DSD, there's a push for Blu-ray Pure Audio. From all the reading I've done, it appears Pure Audio is not really stored as anything other than PCM -- that there's no equivalent to DSD on Pure Audio.