my understand is Optical is digital, every time convert from optical to electrical or electrical to ...
mig33 發表於 2014-8-26 17:38 
Let me tell you sth,
Optical: cheaper to make, almost identical from brand to brand, not much room for differentiation
Coaxial: cost more to make, essentially shielded cable, however more room to differentiate
Optical is the preferred method for high speed data transfer (10Gbps+) over coaxial equivalent due to higher integrity, distance, and lower power requirement.
Even coaxial is digital, it stills bounded by Ohm's Law and Faraday's Law, hence it has limied distance and required shielding. The shielding exists to alleviate its limitations, not improvement over optical.
All forms of digital stream include some kind of error correction. Some say if digital is good enough why need error correction? The true is error (distortion) in analog signal just can't be detected. In digital, errors arise becase of the fact that such digital systems are afterall, based on analog signals. Error corrections aim to remove the such error.
Now it is up to you to decide if your 1.411Mbps LPCM stream from CD transport is really more complicated than those 10Gbps+ data streams in data centre.
9up ended 
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發表於 2014-8-26 17:38
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