Definitions for "Perceptual coding"
Digital audio data reduction technique. Uses the concept of frequency masking to economize on bandwidth. Dominant signals are encoded while imperceptible signals in neighboring frequency bands are discarded. This is a moderately quick data reduction technique (about 80-125 ms), and results in data reduction of 8:1 to 12:1. MPEG L2 and L3 use this scheme.
Lossy compression techniques based on the study of human perception. Perceptual coding systems identify and remove information that is least likely to be missed by the average human observer.
A method of reducing the number of bits needed to encode an audio or video signal by ignoring information unlikely to be heard or seen. Also called "lossy compression."