System and method for biometric acoustic noise reduction
View Patent ↗Embodiments of the invention provide a communication device and methods for generating enhanced audio signals. An audio signal comprising a speech signal and a noise signals is acquired at the communication device. A noise processor of the communication device detects a pitch estimation of the audio signal. Thereafter, the audio signal is processed based on the pitch estimation and processing parameters of the audio signals to remove noise signals and generate an enhanced audio signal.
1. A communication device for generating enhanced audio signals, the communication device comprising:
at least one microphone configured to acquire an audio signal, wherein the audio signal comprises at least one speech signal and at least one noise signal; and
a noise processor configured to:
detect a pitch estimation of the audio signal;
initialize a plurality of processing parameters for the audio signal; and
process the audio signal based on the pitch estimation and the processing parameters, wherein the audio signal is processed to reduce the at least one noise signal and generate an enhanced audio signal;
wherein the noise processor is further configured to:
decrease the pitch estimation value based on a fundamental frequency of the audio signal based on a first predefined condition;
increase the pitch estimation value based on a fundamental frequency of the audio signal and based on a second predefined condition; and
multiply the pitch estimation value with at least one of the plurality of processing parameters to generate an enhanced audio signal;
a transmitter for transmitting the enhanced audio signal over a communication channel;
a switch configured to:
enable the noise processor used for processing the audio signal to reduce at least on noise signal, and disable the noise processor used for processing the audio signal to reduce noise signal.
2. The communication device of claim 1 , wherein the plurality of processing parameters comprise indices for a Fast Fourier Transform (FFT) of the audio signal.
3. The communication device of claim 2 , wherein an index from the plurality of indices comprises a bin of the FFT of the audio signal.
4. A method for generating enhanced audio signals at a communication device, the method comprising:
acquiring by one or more microphones of the communication device an audio signal, wherein the audio signal comprises at least one speech signal and at least one noise signal;
at a noise processor:
detecting a pitch estimation of the audio signal;
initializing a plurality of processing parameters for the audio signal;
processing the audio signal based on the pitch estimation and the processing parameters, wherein the audio signal is processed to reduce the at least one noise signal and generate an enhanced audio signal;
decreasing, at the noise processor, the pitch estimation value based on a fundamental frequency of the audio signal based on a first predefined condition;
increasing, at the switch, the pitch estimation value based on a fundamental frequency of the audio signal based on a second predefined condition; and
multiplying, at the noise processor, the pitch estimation value with at least one of the plurality of processing parameters to generate an enhanced audio signal.
5. The method of claim 4 further comprising transmitting, by a transmitter, the enhanced audio signal over a communication channel.
6. The method of claim 4 further comprising enabling, by a switch, the noise processor for processing of the audio signal to reduce the at least one noise signal.
7. The method of claim 6 further comprising disabling, by a switch, the noise processor for the processing of the audio signal to reduce noise signal.
8. The method claim 4 , wherein the plurality of processing parameters comprise indices for a Fast Fourier Transform (FFT) of the audio signal.
9. The method claim 8 , wherein an index from the plurality of indices comprises a bin of the FFT of the audio signal.
10. A communication device for transmitting enhanced audio signals, the communication device comprising:
at least one microphone configured to acquire an audio signal, wherein the audio signal comprises at least one speech signal and at least one noise signal; and
a noise processor configured to:
detect a pitch estimation of the audio signal;
initialize a plurality of indices for a Fast Fourier Transform (FFT) of the audio signal;
decrease the pitch estimation value based on a fundamental frequency of the audio signal based on a first predefined condition;
increase the pitch estimation value based on a fundamental frequency of the audio signal and a second predefined condition;
multiplying the pitch estimation value with at least one of the plurality of processing parameters to generate an enhanced audio signal; and
a transmitter configured to transmit the enhances audio signal over a communication channel.
11. The communication device of claim 10 further comprising a switch configured to:
enable the noise processor for processing of the audio signal to reduce the at least one noise signal; and
disable the noise processor for the processing of the audio signal to reduce noise signal.
12. The communication device of claim 10 further comprising:
a receiver for receiving an audio signal over a communication channel, wherein the audio signal comprises at least one speech signal and at least one noise signal; and
the noise processor further configured to:
detect a pitch estimation of the audio signal;
initialize a plurality of processing parameters for the audio signal; and
process the audio signal based on the pitch estimation and the processing parameters, wherein the audio signal is processed to reduce the at least one noise signal and generate an enhanced audio signal.
13. The communication device of claim 12 further comprising a speaker configured to output the enhanced audio signal.
14. The communication device of claim 10 , wherein an index from the plurality of indices comprises a bin of the FFT of the audio signal.