November 2012
Beginner to intermediate
134 pages
2h 51m
English
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Chapter 3
Digital signals and sampling
The apparent simplicity of a digital signal is centred on the signal having just two states, on or off, 1 or 0. This is unlike the analogue signal, which will contain many variations in levels which must be preserved in any processing. To generate a digital signal, samples of an analogue signal are taken as a series of numbers. This series of numbers contains all the information required to regenerate the original signal. Converting from analogue to digital is known as coding and reversing the process is known as decoding.
Sampling is performed at a frequency that must be more than twice the highest frequency of the signal to be sampled. For the ITU-R 601 coding standard this sampling frequency is chosen ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.