Phone for realizing noise reduction of voice input signal of hand-free microphone and noise reduction method

Abstract

The invention discloses a phone for realizing noise reduction of a voice input signal of a hand-free microphone and a noise reduction method. According to the invention, a phone receiver of a phone handle is opened while the hand-free microphone of the phone is opened for the hand-free mode call by the phone; a sound source in a hand-free mode is generally away from the phone, so that the hand-free microphone can be used for acquiring a near-end noise signal and a far-end voice signal of the phone; the phone receiver with a define directive property of the phone handle is basically and only can be used for acquiring the near-end noise signal of the phone and cannot be used for acquiring the far-end voice signal, so that all or part of near-end noise signals acquired by the hand-free microphone can be offset by the near-end noise signal acquired by the phone receiver without being additionally provided with any hardware and further the cost of the phone can be considered while the noise reduction of the voice signal input by the hand-free microphone of the phone is realized.

Description

technical field [0001] The invention relates to a telephone noise reduction technology, in particular to a telephone capable of realizing noise reduction of a voice signal input by a hands-free microphone, and a method for reducing noise of a voice signal input by a hands-free microphone. Background technique [0002] For example, a microphone (Microphone) of various fixed telephones such as an IP phone usually has a stronger ability to collect near-end signals than far-end signals. [0003] When using the phone handle to talk, the receiver (Handset Microphone) placed on the phone handle is close to the sound source and has a clear directivity (that is, pointing to the sound source), so the near-end voice signal collected by the receiver will be stronger. The remote noise signal collected by it will be greatly weakened. [0004] But when talking in hands-free mode, the hands-free microphone (Handfree Microphone) placed on the base of the phone is usually far away from the s...

AI Technical Summary

Problems solved by technology

[0006] However, although the microphone array method can enhance the noise reduction processing ability of the voice signal in the hands-free mode to a certain extent, it will lead to an increase in the volume of the phone, an increase in the design complexity of the hardware and the structure, and the cost of the phone. will also rise sharply

[0007] It can be seen that the existing technology cannot simultaneously take into account the noise reduction of the voice signal input by the hands-free microphone of the phone and the cost of the phone

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