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In Reply to: RE: 1) without a doubt, #1 is digital source jitter posted by Wesley Miaw on April 7, 2012 at 14:07:14:
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Conceptually, this is the same to me as controlling the pace of the incoming data,
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I am afraid it is not the same. There are two buffer scenarios:
Controlled input, fixed clock output:
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* CD player - the amount of buffer fill controls the CD spinning speed
* PCI card - the amount of how much of the DMA region/buffer is read by the card controls via IRQs the re-filling of the DMA region/buffer
* USB asynchronous - the fill of short buffer in the USB device determines the feedback messages sent to the player - send more data/send less data
Uncontrollable (independent) input, controlled output to fit the input pace
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In the buffer usage of the SPDIF receiver there is uncontrolled jittery input, with output clock being continuously adjusted to keep the buffer fill optimal via advanced PLL. No fixed clock at the output, unlike in the previous scenarious. And that is a major conceptual difference.
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Follow Ups
- RE: 1) without a doubt, #1 is digital source jitter - phofman 00:03:41 04/08/12 (2)
- RE: 1) without a doubt, #1 is digital source jitter - rick_m 16:51:41 04/08/12 (0)
- RE: 1) without a doubt, #1 is digital source jitter - Wesley Miaw 05:23:48 04/08/12 (0)
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