Patent ID: 9177560
Filing Date: 2015-11-03
Classification: G10L,H03G,H04R

Abstract:
1. A method for reconstructing an audio signal from transformed audio information, the method comprising: obtaining transformed audio information representing a sound, wherein the transformed audio information specifies magnitude of a coefficient related to signal intensity as a function of frequency for the audio signal and time; subtracting noise from the transformed audio information, wherein subtracting the noise includes: interpolating across peak points of harmonic pitch paths through the transformed audio information, the peak points lying along harmonic frequencies in the transformed audio information, interpolating across trough points of harmonic pitch paths through the transformed audio information, the trough points being positioned midway between peak points of adjacent harmonic frequencies in the transformed audio information, and subtracting values associated with individual ones of the trough point interpolations from values associated with individual ones of the peak point interpolations to yield noise-reduced transformed audio information; and reconstructing the audio signal based on a reverse transformation of the noise-reduced transformed audio information.