| Acausal |
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| CATEGORIES ABOUT ANTICAUSAL SYSTEM | |
| control theory | |
| digital signal processing | |
| systems theory | |
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Anticausal systems are also acausal, but the converse is not always true. An acausal system that has any dependence on past input values is not anticausal. An example of acausal signal processing is the production of an output signal that is processed from another input signal by looking at input values both forward and backward in time from a predefined time arbitrarily denoted the "present" time. (In reality, that "present" time input, as well as the "future" time input values, have been recorded at some time in the past, but conceptually it can be called the "present" or "future" input values in this acausal process.) This type of processing cannot be done in realtime as future input values are not yet known, but is done after the input signal has been recorded and is post-processed. |
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