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

A voice signal and microphone technology, which is used in voice analysis, telephone structure, branch office voice amplifier, etc., can solve the rising cost of telephones, the inability to take into account the cost, hardware and structural design complexity of telephone hands-free microphone voice signal noise reduction at the same time Increase and other problems to achieve the effect of noise signal without interference

CN102340562AInactive Publication Date: 2012-02-01NEW H3C TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2012-02-01
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

Examples

Embodiment Construction

[0045] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0046] First, the hands-free microphone input voice signal noise reduction in this embodiment is described in detail.

[0047] Such as figure 1 and Figure 2a and Figure 2b As shown, in this embodiment, the handsets that can implement the noise reduction of the hands-free microphone input voice signal include:

[0048] Phone base 100;

[0049] The hands-free microphone 101 and the hands-free speaker 102 placed on the phone base 100 are all turned on in the hands-free mode;

[0050] The mount base plate 110 of the telephone base 100;

[0051] The phone handle 200 placed on the mount base 100;

[0052] The receiver 201 placed at one end of the phone handle 200, the receiver 201 can be turned on in the receiver talking mode or turned on in the hands...