Audio Signal Processing Workflow: From Waveform to Encoded Output #3387480 (License: Personal Use)

The image depicts a full audio signal processing chain: starting with the time-domain original waveform, it transitions to a 3D spectrogram showing amplitude (dB) over frequency (Hz) and time (ms). Next, a band-pass filter isolates a specific frequency band (e.g., 402-1366 Hz), suppressing unwanted components. Finally, the filtered signal is reconstructed into an encoded waveform (shown in red), preserving perceptually relevant content while reducing data size or noise.

This diagram is commonly used in digital signal processing tutorials, audio engineering courses, and codec documentation to explain spectral filtering and perceptual coding techniques. It serves users seeking to understand how voice or music signals are cleaned, compressed, or prepared for transmission/storage.