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You can understand why CDs have such high fidelity if you understand the analog-to-digital conversion process better. Let's say you have a sound wave, and you wish to sample it with an ADC. Here is a typical wave (assume here that each tick on the horizontal axis represents one-thousandth of a second):
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communication.howstuffworks.com/analog-digital3.htm
communication.howstuffworks.com/analog-digital3.htm
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It is possible to convert information from analog into digital form and back again without losing details. Although the electronic circuits to do this can be quite complex, the basic idea is fairly simple. To see how it works we can consider turning the analog We can repeat this process as many times as we like,
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www.st-andrews.ac.uk/~www_pa/Scots_Guide/info/signals/d...
www.st-andrews.ac.uk/~www_pa/Scots_Guide/info/signals/digital/ad_da/ad_da.htm
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Analogue To Digital Conversion: Linking Video Art and the Web ... This almost infinite plasticity is relevant not just in terms of the making process, and the viewer/user/audience interaction with the work, but also in context.
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www.art-research-communication.net/cryptic/cj_home/anal...
www.art-research-communication.net/cryptic/cj_home/analog.html
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This paper presents a digital pixel sensor array, in which the photodiode sensor, the analogue to digital conversion circuitry, and an 8-bit memory are combined in the 45?m ?45?m pixel, yielding a 12% fill factor. ... The 64 ? 64 pixel array is manufactured using a standard 0.35 ?m, five metal, digital CMOS process.
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csdl.computer.org/comp/proceedings/delta/2004/2081/00/2...
csdl.computer.org/comp/proceedings/delta/2004/2081/00/20810108abs.htm
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Analogue to digital conversion methods in which the input analogue signal is periodically sampled at a predetermined constant rate and each sampled value is converted into a corresponding digital representation are standard.
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www.freepatentsonline.com/6492929.html
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4782391 Multiple input digital video features processor for TV signals ... The sampling means 3 is the same as described in connection with fig 3 and comprises the first, second and third switches SW1, SW2, SW3 and the sampling capacitor C i . In order for the sub-ADCs to process the sampled analogue value, we need to hold...
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www.freepatentsonline.com/EP1044505.html
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In the receive chain of a mobile base-station, the high frequency RF carrier signal is first down-converted in the mixer and local oscillator stage to an IF frequency in the range of 150 -190MHz for analogue to digital conversion.
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en.allexperts.com/q/Bandwidth-2447/GSM-Bandwidth-reduct...
en.allexperts.com/q/Bandwidth-2447/GSM-Bandwidth-reduction.htm
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Analogue to digital conversion technology ... A typical analog-to-digital process consists of two stages: discrete-time sampling followed by amplitude quantization. The sampling takes samples of the incoming signal voltage at teh predetermined rate (sample rate).
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www.epanorama.net/links/audiodigital.html
www.epanorama.net/links/audiodigital.html
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Digital-to-analog conversion is a process in which signals having a few (usually two) defined levels or states (digital) are converted into signals having a theoretically infinite number of states (analog).
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searchcio-midmarket.techtarget.com/sDefinition/0,,sid18...
searchcio-midmarket.techtarget.com/sDefinition/0,,sid183_gci213875,00.html
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