Restoration of high-order Mel frequency cepstral coefficients
AssigneeNuance Communications, Inc.
InventorAlexander Sorin
Life of this patent
Estimating the term…
Abstract
A method for estimating high-order Mel Frequency Cepstral Coefficients, the method comprising initializing any of N−L high-order coefficients (HOC) of an MFCC vector of length N having L low-order coefficients (LOC) to a predetermined value, thereby forming a candidate MFCC vector, synthesizing a speech signal frame from the candidate MFCC vector and a pitch value, and computing an N-dimensional MFCC vector from the synthesized frame, thereby producing an output MFCC vector.
Claims25
A method of estimating at least one estimated coefficient of a set of cepstral coefficients obtained by processing a speech input, the method comprising:
- receiving a subset of the set of coefficients and a pitch value that was obtained from the speech input;
- and
- computing the at least one estimated coefficient based, at least in part, on the subset of the set of coefficients and the pitch value.
An apparatus for estimating at least one estimated coefficient of a set of cepstral coefficients obtained by processing a speech input, the method comprising:
- means for receiving a subset of the set of coefficients and a pitch value that was obtained from the speech input;
- and
- means for computing the at least one estimated coefficient based, at least in part, on the subset of the set of coefficients and the pitch value.
A system comprising:
- a coefficient restoration apparatus configured to:
- receive a subset of the set of coefficients and a pitch value that was obtained from the speech input;
- and
- compute at least one estimated coefficient of the set of coefficients based, at least in part, on the subset of the set of coefficients and the pitch value.
Dependencies are inferred from the claim text.