Sub-band coding
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This article is about the signal coding technique. For the Bluetooth audio codec, see SBC (codec).
In signal processing, sub-band coding (SBC) is any form of transform coding that breaks a signal into a number of different frequency bands, typically by using a fast Fourier transform, and encodes each one independently. This decomposition is often the first step in data compression for audio and video signals.
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SBC is the core technique used in many popular lossy audio compression algorithms including MP3.