Method and system for reducing noise based on frequency characteristics

A technology of frequency characteristics and noise, applied in the field of data communication, can solve problems such as unclear information transmission, achieve the effect of improving subjective initiative, facilitating data storage and recall, and reducing part of the noise

Pending Publication Date: 2017-12-08
台州市吉吉知识产权运营有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The caller records the sound into the mobile phone in advance, and the mobile phone will recognize the frequency of the speaker's voice. When the mobile phone is set to call within this sound frequency range, the sound of other frequencies will be filtered out, thereby enhancing the quality of the call. When the volume of the caller is low, the volume received by the receiver is also low. At the same time, when there are two callers at one end of the phone, their voice signals may overlap, which will make the information transmission unclear

Method used

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  • Method and system for reducing noise based on frequency characteristics
  • Method and system for reducing noise based on frequency characteristics
  • Method and system for reducing noise based on frequency characteristics

Examples

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Embodiment 1

[0056] Such as figure 1 As shown, this embodiment provides a method for reducing noise based on frequency characteristics, and the method includes the following steps:

[0057] S10: collecting sound signals;

[0058] In this step, the conventional acquisition device is a microphone, and only one is required.

[0059] S20: Filter the sound signal to obtain a filtered signal, and decompose the filtered signal into a sound domain signal;

[0060] In this step, filter technology is used to filter part of the obviously irregular noise, instead of filtering all background noise, to obtain the filtered signal, and then the DSP processing device expands and decomposes the filtered signal into an audio domain signal, the so-called frequency domain, is the signal In terms of frequency characteristics, a coordinate system is used, the abscissa is the frequency, and the ordinate can be the amplitude or the phase; from this coordinate, the relevant part of the signal and frequency can be...

Embodiment 2

[0069] Such as figure 2 As shown, the difference between this embodiment and the previous embodiments is that this embodiment provides a more detailed method for obtaining the frequency domain required by the user, and the step S30 includes:

[0070] S31: judging whether to automatically select the frequency domain required by the user;

[0071] In this step, the system can pre-set the trigger conditions for automatically selecting the frequency domain required by the user, such as displaying the automatic selection and manual selection option interfaces as the trigger conditions, which are determined by the user; The voice environment automatically selects the frequency domain required by the user. If it is the voice recording or sending of the software, the user manually selects the required frequency domain.

[0072] S32: If yes, automatically select the frequency domain required by the user; if not, manually select the required frequency domain by the user.

[0073] In ...

Embodiment 3

[0084] Such as image 3 As shown, the difference between this embodiment and Embodiment 2 is that this embodiment provides a specific method for enhancing the frequency domain signal required by the user and weakening other frequency domain signals, and the step S40 includes the following steps:

[0085] S41: Increase the bandwidth of the audio frequency domain signal required by the user, and compress the bandwidth of other frequency domain signals;

[0086] S42: Compare the sound intensity of the audio frequency domain signal required by the user with the preset sound intensity, and determine whether the sound intensity needs to be adjusted;

[0087] S43: If yes, enhance the sound intensity of the audio frequency domain signal required by the user, and weaken the sound intensity of other frequency domain signals.

[0088] Specifically, assuming that there are three sounds collected in the environment, namely 400Hz, 420Hz and 440Hz, and the volume is about the same, and even...

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Abstract

The invention discloses a method and a system for reducing noise based on frequency characteristics. The method comprises the following steps: S10: acquiring a sound signal; S20: filtering the sound signal, so as to obtain a filtered signal, and decomposing the filtered signal into sound frequency domain signals; S30: acquiring a sound frequency domain which is required by a user; S40: implementing enhancement processing on a sound frequency domain signal which is required by the user, and implementing weakening processing on signals of other frequency domains, so that a playing frequency domain signal is obtained; and S50: reducing the playing frequency domain signal and playing sound. The method provided by the invention, which reduces the noise on the basis of the natural properties of the sound, is easy to implement and broad in application scope; and a voice scheme can be freely selected, so that voice delivery becomes more intuitive and valid, user perception is clearer and voice is easier to recognize.

Description

technical field [0001] The invention relates to data communication technology, in particular to a method and system for reducing noise based on frequency characteristics. Background technique [0002] Communication is the process of transmission and feedback of thoughts and feelings between people and between people and groups, and is the basis of human progress and development. Hundreds of years ago, people used letters to achieve long-distance communication. With the development of science and technology, today, hundreds of years later, people can communicate over long distances through voice, text, image or motion data communication. [0003] Voice transmission is the most common long-distance communication method used in today's society. People can use the telephone anytime, anywhere, and through the voice transmission function of social software to record and then transmit information, but in real life, if we are in a relatively noisy surrounding environment In the cas...

Claims

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Application Information

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IPC IPC(8): G10L21/0208G10L21/0232G10L21/0316H04M1/19
CPCG10L21/0208G10L21/0232G10L21/0316G10L2021/02082H04M1/19
Inventor 蔡强
Owner 台州市吉吉知识产权运营有限公司
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