Discussion
Compressing a signal before quantising and expanding it afterwards is called ______.
Answer: B
The technique is companding, a contraction of compressing and expanding, and it gives small signals finer effective resolution at no cost in bit rate. Aliasing is the folding of high frequencies by under-sampling. Regeneration is the reconstruction of pulses along a route. And multiplexing is the sharing of one path among channels. Each term belongs to a different stage of the chain, and placing them correctly is most of understanding a coder's block diagram.
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