Noise suppression for a wireless communication device

Details Noise suppression for a wireless communication device Noise suppression for a wireless communication device

2007-04-17

2007-04-17

Pendleton, Brian T. (Department: 2615)

Electrical audio signal processing systems and devices

Directive circuits for microphones

C381S094700

Reexamination Certificate

active

10076201

ABSTRACT:
Techniques to suppress noise from a signal comprised of speech plus noise. In accordance with aspects of the invention, two or more signal detectors (e.g., microphones) are used to detect respective signals having speech and noise components, with the magnitude of each component being dependent on various factors such as the distance between the speech source and the microphone. Signal processing is then used to process the detected signals to generate the desired output signal having predominantly speech with a large portion of the noise removed. The techniques described herein may be advantageously used for both near-field and far-field applications, and may be implemented in various mobile communication devices such as cellular phones.

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Saruwatari, Hiroshi; Kajita, Shoji; Takeda, Kazuya; Itakura, Fumitada; “Speech Enhancement Using Nonlinear Microphone Array”, Mar. 1999, IEEE International Conference on Acoustics, Speech, and Signal Processing, 1999. pp. 69-72 vol. 1.

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