June 2, 2021
Back to: Fundamentals of Signal Processing
The action of processing data implies that we are changing the data in some way. An example of data processing would be notching out 60Hz of noise from a signal.
Data processing is distinct from data analysis, which separates data into components for a greater understanding of that data. For example, 300 years ago, Isaac Newton used a prism to separate white light into its various color components.
It is also distinct from system identification, which leverages insights from data analysis to estimate the properties of a system. Newton used detailed moon analyses from John Flamsteed to better identify the moon’s motion around the earth.
Data Processing Operations
Data processing operations include the following:
- Low-latency filtering: IIR filters with feedback
- General-purpose filtering: FIR filters without feedback
- Windowing: FIR multiplication in time rather than convolution
- Resampling: upsampling or downsampling
- Baily, Francis, Supplement to the Account of the Revd. John Flamsteed, the First Astronomer-Royal. London: William Clowes and Sons, 1837.
- Cohen, I. Bernard and George E. Smith, The Cambridge Companion to Newton. Cambridge, United Kingdom: Cambridge University Press, 2002.
- Greenhoe, Daniel J., A Book Concerning Digital Signal Processing. Self-published, 2019. researchgate.net/project/Signal-Processing-ABCs.
- Newton, Sir Isaac, The Mathematical Principles of Natural Philosophy. New York: Daniel Adee, 1846. archive.org/details/newtonspmathema00newtrich/page/n441.