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Audio signal processing method and device

An audio signal and processing method technology, applied in the audio field, can solve problems such as multiple storage resources, and achieve the effects of simple operation, small amount of data, and saving data storage space

Active Publication Date: 2017-07-28
SHENZHEN TCL NEW-TECH CO LTD
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Problems solved by technology

Using this method to calculate and obtain the required digital audio signal amplitude value is easy to achieve when n is not large. When n is too large, this method requires too much storage resources, so this method is not suitable for large n values. Case

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  • Audio signal processing method and device
  • Audio signal processing method and device

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Embodiment Construction

[0036] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0037] see figure 1 , propose an embodiment of an audio signal processing method of the present invention, comprising:

[0038] Step S101 , according to the set time interval, sequentially acquire the amplitude sampling value of the corresponding time point of the audio signal, and compare the adopted value of the amplitude while acquiring the amplitude sampling value. If the amplitude sampling value of the current time point is greater than or equal to the amplitude average value of the previous time point of the audio signal, then proceed to step S102; if the amplitude sampling value of the current time point is less than the amplitude average value of the previous time point of the audio signal, Then go to step S103.

[0039] Step S102, if the amplitude sampling value at the current time point is greater than or ...

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Abstract

The invention discloses an audio signal processing method and device. The method comprises the following steps that amplitude sampling values of an audio signal at all time points are acquired in sequence according to set time intervals, wherein the amplitude sampling values are compared when acquired; if the amplitude sampling value at the current time point is greater than or equal to the amplitude average value at the previous time point, the amplitude average value at the current time point is calculated according to the formula X[pi]=A* / Xi / +(1-A)*X[p(i-1)]; if the amplitude sampling value at the current time point is smaller than the amplitude average value at the previous time point, the amplitude average value at the current time point is calculated according to the formula X[pi]= (1-R)*X[p(i-1)]. According to the audio signal processing method and device, the calculated amplitude dynamic average value relates to a small data size, operation is easy, no relevant mass data need to be stored, and a large amount of data storage space is saved on the basis of guaranteeing that the calculated amplitude dynamic average value in each frequency band meets the requirement of human ear characteristics.

Description

technical field [0001] The present invention relates to the field of audio technology, in particular to an audio signal processing method and device. Background technique [0002] In the field of traditional digital audio technology, an ultra-low frequency low-pass filter is generally used to obtain the amplitude value and variation of audio signals in each frequency band of digital audio. However, the design of this ultra-low-frequency low-pass filter is difficult, poor in stability, and consumes a lot of resources. [0003] In addition, the sampling frequency of digital audio is several times higher than the highest frequency of ordinary audio. For example, the sampling frequency of digital audio can be 44.1kHz, 48kHz, etc. Since the absolute value of a certain digital audio sampling frequency is directly used as the amplitude value of the digital audio signal, it has large dispersion and has no practical value. [0004] In the prior art, in order to ensure that a more p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L21/0364G10L25/84
Inventor 何文辉高伟标刘飞祥
Owner SHENZHEN TCL NEW-TECH CO LTD
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