Patent ID: 6161088
Filing Date: 2000-12-12
Classification: G10L

Abstract:
A method for encoding a digital audio signal, the method comprising the steps of:filtering a portion of the digital audio signal into a first number of frequency ranges to produce a respective first number of filtered signals;performing a discrete frequency analysis on each of the first number of filtered signals to produce a frequency representation of the digital audio signal by performing an N point frequency analysis of a first portion of the first number of frequency ranges and an M point frequency analysis on a second portion of the first number of frequency ranges, M being different from N;generating a psychoacoustic representation of the digital audio signal based on the frequency representation of the digital audio signal; andformatting the first number of filtered signals based on the psychoacoustic representation of the digital audio signal to produce a digitally-compressed encoded bit stream representing a portion of the digital audio signal.