Systems, methods, apparatus, and computer program products for speech signal processing using spectral contrast enhancement
First Claim
Patent Images
1. A method comprising performing each of the following acts within a device that is configured to process audio signals:
- performing a spatially selective processing operation within a spatially selective processing filter on a multichannel sensed audio signal to produce a source signal and a noise reference; and
performing a first spectral contrast enhancement operation within a first spectral contrast enhancer on a far end speech signal and the noise reference to produce a first processed speech signal.
2 Assignments
0 Petitions
Accused Products
Abstract
Systems, methods, and apparatus for spectral contrast enhancement of speech signals, based on information from a noise reference that is derived by a spatially selective processing filter from a multichannel sensed audio signal, are disclosed.
130 Citations
35 Claims
-
1. A method comprising performing each of the following acts within a device that is configured to process audio signals:
-
performing a spatially selective processing operation within a spatially selective processing filter on a multichannel sensed audio signal to produce a source signal and a noise reference; and performing a first spectral contrast enhancement operation within a first spectral contrast enhancer on a far end speech signal and the noise reference to produce a first processed speech signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. An apparatus comprising:
-
means for performing a spatially selective processing operation on a multichannel sensed audio signal to produce a source signal and a noise reference; and means for performing a first spectral contrast enhancement operation within a first spectral contrast enhancer on a far end speech signal and the noise reference to produce a first processed speech signal. - View Dependent Claims (12, 14, 15, 16, 17, 18, 19)
-
-
13. The apparatus of 11, wherein the apparatus comprises means for cancelling echoes from the multichannel sensed audio signal, and wherein the means for cancelling echoes is configured and arranged to be trained by the first processed speech signal.
-
20. An apparatus comprising:
-
a spatially selective processing filter configured to perform a spatially selective processing operation on a multichannel sensed audio signal to produce a source signal and a noise reference; and a first spectral contrast enhancer, coupled to the spatially selective processing filter, configured to perform a spectral contrast enhancement operation on a far end speech signal and the noise reference to produce a first processed speech signal. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
-
-
28. A non-transitory computer-readable medium comprising instructions which when executed by at least one processor cause the at least one processor to perform a method comprising:
-
instructions which when executed by a processor cause the processor to perform a spatially selective processing operation on a multichannel sensed audio signal to produce a source signal and a noise reference; and instructions which when executed by a processor cause the processor to perform a first spectral contrast enhancement operation within a first spectral contrast enhancer on a speech signal and the noise reference to produce a first processed speech signal, wherein the speech signal comprises a far end speech signal. - View Dependent Claims (29, 30, 31, 33, 34, 35)
-
-
32. A non-transitory computer-readable medium comprising instructions which when executed by at least one processor cause the at least one processor to perform the first spectral contrast enhancement operation comprising:
-
instructions which when executed by a processor cause the processor to calculate a first plurality of subband factors based on information from the noise reference; instructions which when executed by a processor cause the processor to calculate a second plurality of subband factors based on information from the far end speech signal; instructions which when executed by a processor cause the processor to generate a contrast enhanced signal by applying the second plurality of subband factors to the far end speech signal subbands; and instructions which when executed by a processor cause the processor to combine the first plurality of subband factors and the first contrast enhanced signal.
-
Specification