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A method and device for calculating cut-off frequency

A technology of cut-off frequency and frequency point, which is applied in the field of calculation of cut-off frequency, can solve the problem that the cut-off frequency cannot be obtained

Active Publication Date: 2022-02-01
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

To solve the problem of not being able to obtain an accurate cut-off frequency

Method used

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  • A method and device for calculating cut-off frequency
  • A method and device for calculating cut-off frequency
  • A method and device for calculating cut-off frequency

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Embodiment Construction

[0092] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0093] Please refer to figure 1 , is a schematic diagram of the system architecture of the application of the method for calculating the cutoff frequency provided by the embodiment of the present application; the system architecture includes an audio input interface, an audio processor, a memory, and an audio output interface.

[0094] The audio input interface 10 is used to obtain the audio sequence from the network server or the local storage 30 and input it to the audio processor 20 for...

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Abstract

The embodiment of the present application discloses a method and device for calculating a cutoff frequency. In the method, the spectral energy of each frequency point of a data frame is calculated to determine the spectral energy distribution; a preset matching function is performed with the spectral energy distribution. Iterate matching until the degree of coincidence between the target matching function graph obtained after iteration and the spectral energy distribution graph meets the preset requirements, wherein the preset matching function takes the frequency point sequence number as an independent variable; according to the target matching function graph The corresponding frequency point serial number determines the cutoff frequency of the data frame. By adopting the present application, an accurate cutoff frequency can be obtained, and it is not necessary to manually adjust the calculation parameters for different audio sequences in advance, and it is generally applicable to the processing of various audio sequences.

Description

technical field [0001] The invention relates to the field of audio technology, in particular to a method and device for calculating a cutoff frequency. Background technique [0002] According to the investigation of the audio and video content involved in major audio and video websites and mobile terminal applications, the spectral energy of the audio sequences (that is, various sound information such as voice, music, background sound, dialogue, etc.) The distribution has a falling edge at a certain frequency, so that the spectral energy of some frequency points is concentrated below a certain frequency. The frequency corresponding to the position of the falling edge (according to requirements, any frequency position between the starting point and the end point of the falling edge can be taken, and the midpoint between the starting point and the end point is generally better) can be called the cutoff frequency of the audio sequence. Accurately calculating the cutoff frequen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L25/03G10L25/27G10L25/48
CPCG10L25/03G10L25/27G10L25/48
Inventor 邵纬航
Owner HUAWEI TECH CO LTD