Perceptual coding

Perceptual coding is a method of lossy data compression that exploits the limitations of human sensory system in order to reduce data size. It is widely applied in audio, image and video compression standards, where certain details are removed or simplified because they are unlikely to be noticed under regular listening or viewing conditions.

Perceptual coding is based on models of human hearing and vision, such as those studied in psychoacoustics and psychovisual research. By discarding or reducing components of a signal that fall below perceptual thresholds, it achieves significant reductions in bit rate while maintaining a subjectively acceptable quality.

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