Real-time computing | Wikipedia audio article
Channel: wikipedia tts
Date: 27/06/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Real-time_computing


00:01:59 1 History
00:05:09 2 Criteria for real-time computing
00:08:42 2.1 Real-time in digital signal processing
00:10:59 2.1.1 Live vs. real-time
00:12:03 3 Real-time and high-performance
00:14:39 4 Near real-time
00:16:32 5 Design methods



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SUMMARY
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In computer science, real-time computing (RTC), or reactive computing describes hardware and software systems subject to a "real-time constraint", for example from event to system response. Real-time programs must guarantee response within specified time constraints, often referred to as "deadlines".  The correctness of these types of systems depends on their temporal aspects as well as their functional aspects. Real-time responses are often understood to be in the order of milliseconds, and sometimes microseconds. A system not specified as operating in real time cannot usually guarantee a response within any timeframe, although typical or expected response times may be given.
A real-time system has been described as one which "controls an environment by receiving data, processing them, and returning the results sufficiently quickly to affect the environment at that time". The term "real-time" is also used in simulation to mean that the simulation's clock runs at the same speed as a real clock, and in process control and enterprise systems to mean "without significant delay".
Real-time software may use one or more of the following: synchronous programming languages, real-time operating systems, and real-time networks, each of which provide essential frameworks on which to build a real-time software application.
Systems used for many mission critical applications must be real-time, such as for control of fly-by-wire aircraft, or anti-lock brakes on a vehicle, which must produce maximum deceleration but intermittently stop braking to prevent skidding. Real-time processing fails if not completed within a specified deadline relative to an event; deadlines must always be met, regardless of system load.