One broad-spectrum transmission is not parallel. Two independent transmissions are not parallel. In a parallel system, more than one independent connection exists for the transmission, and the transmission is done so with more than one aspect of it in flight at any one time. Those who apply "serial" and "parallel" to analog signals do so with reckless abandon. but you need to be much more careful about propagation delays in each of the parallel wires (transmission lines), to make sure they all arrive close enough to simultaneously for your receiver to decode them properly.
You can get the same throughput from a parallel scheme at a lower clock rate.
Macwise vs serial serial#
This is especially true in the wireless communication world, where all of your digital data has to be encoded onto some RF carrier frequency.įrom a design perspective, serial data transmission requires high clock rates to achieve high throughput. On the other hand, at a low enough level everything digital is analog, and you're looking at things like encoding serial digital data with phase-shift keying.
"Analog serial" is a little less meaningful, as you might consider it in the case of a steady-state analog value, with a serial "clock rate" of 0 Hz.
VGA is a good example of an analog parallel signal, as are component video and S-video - the full signal is split into multiple components transmitted simultaneously. I suppose they could be considered orthogonal distinctions: digital serial and parallel buses and protocols are well-known as the OP described.
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