What Is Real Time?
The concept of real-time processing is so subjective that it is almost impossible to apply an
absolute definition to it. For example, a real-time temperature monitoring system might require an
update rate of only 5 times/sec to control the climate of an environment, whereas a real-time digital
audio system might require the ability to process data at up to 48 kHz, or 48,000 times/sec. Thus,
a system that operates in real time for temperature monitoring would be inadequate for a digital
audio application. Likewise, a system that operates in real time for a digital audio application
might be inadequate for radio- or microwave-frequency experiments.
What is a good definition of real time? A good definition for this subjective concept is itself
subjective–real-time processing depends upon the situation at hand. If an application to be
controlled or analyzed requires that time-critical functions be completed within a given time
interval, then a system can be called a real-time system if it will completely execute the necessary
functions within the given time interval for all cases. More specifically, real time implies real time
within the constraints of the system of interest.
What Is Real Time?
The concept of real-time processing is so subjective that it is almost impossible to apply an
absolute definition to it. For example, a real-time temperature monitoring system might require an
update rate of only 5 times/sec to control the climate of an environment, whereas a real-time digital
audio system might require the ability to process data at up to 48 kHz, or 48,000 times/sec. Thus,
a system that operates in real time for temperature monitoring would be inadequate for a digital
audio application. Likewise, a system that operates in real time for a digital audio application
might be inadequate for radio- or microwave-frequency experiments.
What is a good definition of real time? A good definition for this subjective concept is itself
subjective–real-time processing depends upon the situation at hand. If an application to be
controlled or analyzed requires that time-critical functions be completed within a given time
interval, then a system can be called a real-time system if it will completely execute the necessary
functions within the given time interval for all cases. More specifically, real time implies real time
within the constraints of the system of interest.
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