Sinusoidal model based coding of audio signals

Details Sinusoidal model based coding of audio signals Sinusoidal model based coding of audio signals

2006-10-10

2006-10-10

Saint-Cyr, Leonard (Department: 2626)

Data processing: speech signal processing, linguistics, language

Audio signal bandwidth compression or expansion

C704S205000

Reexamination Certificate

active

07120587

ABSTRACT:
An apparatus and method of signal coding includes an analysis-by-synthesis algorithm for sinusoidal modeling. An input signal to be modeled is divided in time to produce a plurality of frames. Functions from a dictionary are selected to form an approximation of the section of the input signal contained in each frame, with the selection carried out based on a psychoacoustic norm. The function dictionary is made up of complex exponentials and these are selected iteratively to make up the section of the input signal contained in each frame. The psychoacoustic norm adapts after each iteration according to the changing masking threshold of the residual signal to be modeled in the next step.

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