A method and device for eliminating noise and electronic equipment
A technology for eliminating noise and sub-units, applied in electrical components, transducer circuits, signal processing, etc., can solve problems such as popping noise and reduce user's auditory experience, and achieve the effect of eliminating popping noise and improving auditory experience
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Embodiment 1
[0057] This embodiment provides a method for eliminating noise, and introduces in detail the process of how to judge the mutation position caused by the user's random positioning operation. Please refer to Figure 4 , showing a schematic flow chart of the method, the method comprising:
[0058] Step S21: Acquire an audio sampling signal, the audio sampling signal includes N+1 continuous audio sampling points, where N is a positive integer;
[0059] Step S22: taking the difference between every two adjacent audio sampling points in the audio sampling signal to obtain N first difference values;
[0060] Step S23: performing an absolute value operation on each of the first differences to obtain N second differences and storing them;
[0061] The difference between every two adjacent audio sampling points in the audio sampling signal is taken, and the absolute value operation is taken to judge the position of the waveform mutation. Specifically, in the audio sampling signal, the...
Embodiment 2
[0069] This embodiment provides another method for eliminating noise, and introduces in detail the process of smoothing and filtering the audio sampling signal to eliminate the sudden change position. Please refer to Figure 5 , showing a schematic flow chart of the method, the method comprising:
[0070] Step S31: Acquire an audio sampling signal, the audio sampling signal includes N+1 continuous audio sampling points, and the N is a positive integer;
[0071] Step S32: judging whether there is a sudden change in the audio sampling signal, and the sudden change is caused by a user's random positioning operation;
[0072] Step S32: If there is the sudden change position, perform a linear fade-out operation on the first audio sampling point and the consecutive M3 audio sampling points before its position, and perform a linear fade-out operation on the second audio sampling point and its consecutive M4 audio sampling points after its position. Linear fade-in operation processin...
Embodiment 3
[0082] This embodiment provides a device for eliminating noise, please refer to Figure 7 , shows a schematic diagram of the device. The device includes: an acquisition unit 11, a first judgment unit 12 and a filter processing unit 13, wherein,
[0083] An acquisition unit 11, configured to acquire an audio sampling signal, the audio sampling signal including N+1 continuous audio sampling points, where N is a positive integer;
[0084] The first judging unit 12 includes:
[0085] The first calculating subunit 121 is configured to make a difference between every two adjacent audio sampling points in the audio sampling signal to obtain N first difference values;
[0086] The second calculation subunit 122 is configured to perform an absolute value operation on each of the first differences to obtain N second differences and store them;
[0087] The first judging subunit 123 is configured to judge whether each of the second differences is greater than a preset first threshold,...
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