Method and apparatus for audio signal enhancement in reverberant environment
AssigneeASUSTeK COMPUTER INC.
InventorBhoomek D. Pandya
Life of this patent
Estimating the term…
Abstract
The present disclosure proposes a method and an apparatus to enhance reverberated speech by applying reverberation detection in conjunction with reverberation cancellation. The reverberation detection is based on Kurtosis of cross correlation of LPC residue and outputs the result of the reverberation detection to the reverberation cancelling system. The reverberation cancellation receives the result from the reverberation detection, and the cancellation is based on dual adaptive filtering in LP residue and time domain.
Claims20
A method for enhancing reverberated speech, adapted for an electronic device, and the method comprising:
- receiving a first signal;
- calculating the linear prediction (LP) residual of the first signal;
- applying a first non-negative matrix factorization (NMF) process to the LP residual;
- copying filter coefficients from the first NMF process;
- and
- processing the first signal by applying a second NMF process using the filter coefficients from the first NMF process as the initial condition to produce a second signal.
An apparatus for enhancing reverberated speech comprising:
- a transducer for converting the reverberated speech into a first signal;
- and
- a processor coupled to the transducer and is configured for:
- calculating the linear prediction (LP) residual of the first signal;
- applying a first non-negative matrix factorization (NMF) process to the LP residual;
- copying filter coefficients from the first NMF process;
- and
- processing the first signal by applying a second NMF process using the filter coefficients from the first NMF process as the initial condition to produce a second signal.
Dependencies are inferred from the claim text.