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What is Real-Time?

April 26, 2017Devices embedded linux mobile real-time realtime rtai rtlinux time uclinux

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What is Real-Time?

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Numerous test, control, and design application require real-time performance. This tutorial will cover the basic concepts of real-time systems.

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Real time is an event that is happening right now. If you are seeing stocks in real time it means that when you update the website you are seeing the stock prices as they are in the stock exchange right then.

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Real time is where 1 second = 1 second. ‘Real time’ is generally used when people are talking about recording. If a player can record in real time it means that the player can make an MP3 recording of someone’s voice or a radio broadcast: something that happens ‘live’. This is a good feature to have as recording MP3s in real time takes a lot of processing power. Songs stored on an ordinary CD are encoded from audio to MP3s using super efficient methods of reading and writing. A CD that has 10 songs and 1 hour of music can be made into 10 MP3s within about 10 mins. That is not ‘real time’. 1 hour into 10 minutes is not happening live, and so, in simple terms, it is not ‘real time’.

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