Are oversampling and downsampling the same thing? According the books I have on DSP,


is oversampling, sampling a signal at a much higher samplingrate then normally required, so to reduce the sample-rate (and increase the resolution of the signal) afterwards
is downsampling (decimation), lowering the samplerate of a signal, e.g. to reduce the CPU-requirements of signal-processing blocks later down the chain


So can I conclude that these two techniques are basically the same?

And does this mean that -as a concequence- downsampling will also increase the signal-resolution, just as with oversampling?

Or am I missing something?

Kristoff
OK. it looks like I got things mixed up.

The book on DSP I have mentions oversampling and that it is / can be followed by downsampling/decimation, ... and therefor I (wrongly) assumed that "oversampling" included both steps.

Mystery solved.
Thanks for the correction.

Kristoff