DavidsCD: Difference between revisions
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As seen above storing voice samles on a cd only involves a couple of steps. |
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First the data must be passed through a low pass filter incase there are any unwanted high frequencies. In our case we would need a filter to pass anything under 22kHz. If we pass anything higher than this then there will be alaising. Next an analog to digital converter (ADC) samples the data at 44000kHz. It does this by basically picking the closest sampling value to the analog value. Next this data is stored on a CD. |
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Data is taken from the CD player and represented mathmatically as |
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[[Image:barnsaDA.jpg|Digital to analog conversion]] |
[[Image:barnsaDA.jpg|Digital to analog conversion]] |
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(Images by Rob Frohne and resized by Sam Barnes) |
(Images by Rob Frohne and resized by Sam Barnes) |
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Revision as of 01:38, 10 December 2004
CD Players Explained!
insert pic1
As seen above storing voice samles on a cd only involves a couple of steps. First the data must be passed through a low pass filter incase there are any unwanted high frequencies. In our case we would need a filter to pass anything under 22kHz. If we pass anything higher than this then there will be alaising. Next an analog to digital converter (ADC) samples the data at 44000kHz. It does this by basically picking the closest sampling value to the analog value. Next this data is stored on a CD.
insert pic2
Data is taken from the CD player and represented mathmatically as
File:Barnsasample.jpg (Images by Rob Frohne and resized by Sam Barnes)
