In Reply to: Forgot to mention, most PCM dithering algorithms generate similar ultrasonic noise posted by Christine Tham on September 14, 2005 at 20:42:40:
"What the diagrams don't show of course is that the noise shaping continues into the ultrasonics"The noise energy can only be distributed within the systems bandwidth if pcm is used.
(Upper part being ultrasonic of course)Beyond the upper bandwidth limit of a pcm system the noise will be filtered.
Also in this repect DSD has the disadvantage that the noise shaping needs to be done in the ad converter and as a consequence the noise is *always* included in the recording.
With pcm this depends on the hardware/software algorithms used.
Frank
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Follow Ups
- Slight correction... - Frank.. 02:54:35 09/15/05 (12)
- Corrections to your corrections! - Christine Tham 13:55:25 09/15/05 (5)
- AD converter issues.. - Frank.. 03:06:28 09/19/05 (0)
- Re: Corrections to your corrections! - Frank.. 23:32:39 09/18/05 (0)
- If you've ever used any of Philips' DSD software, Frank... - Michi 14:27:48 09/16/05 (2)
- Re: If you've ever used any of Philips' DSD software, Frank... - Frank.. 23:37:19 09/18/05 (0)
- Interesting! I did not know that! (nt) - Christine Tham 15:48:41 09/16/05 (0)
- Exactly right. Besides we're talking about audibilty... - meisterkleef 08:26:56 09/15/05 (5)
- Re: Exactly right. Besides we're talking about audibilty... - Christine Tham 14:09:33 09/15/05 (2)
- Re: Exactly right. Besides we're talking about audibilty... - evector 18:22:03 09/16/05 (0)
- Great charts! Thanks! (NT) - meisterkleef 10:41:08 09/16/05 (0)
- Another slight correction.. - Frank.. 11:07:28 09/15/05 (1)
- Thanks! I differentiated because PCM is filtered above passband. (NT) - meisterkleef 13:11:17 09/15/05 (0)