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Sub-band coding - Wikipedia
https://en.wikipedia.org/wiki/Sub-band_coding#:~:text=In%20signal%20processing%2C%20sub-band%20coding%20%28SBC%29%20is%20any,in%20data%20compression%20for%20audio%20and%20video%20signals.
Theory of Subband Decomposition | SpringerLink
https://link.springer.com/chapter/10.1007/978-1-4612-0113-7_5
What is subband processing? – Idsemergencymanagement.com
https://www.idsemergencymanagement.com/2021/03/09/what-is-subband-processing/
This decomposition is often the first step in data compression for audio and video signals. What is subband filtering? In signal processing, a filter bank (or filterbank) is an array of bandpass filters that separates the input signal into multiple components, each one carrying a single frequency sub-band of the original signal.
Subband Audio Compression - McGill University
http://www.info491.ece.mcgill.ca/handout4.pdf
Subband Signal - an overview | ScienceDirect Topics
https://www.sciencedirect.com/topics/computer-science/subband-signal
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