Method and device for analyzing music BPM (Beat Per Minutes)

A music, to-be-analyzed technology, applied in the direction of electroacoustic musical instruments, instruments, etc., can solve problems such as difficulty in ensuring the accuracy of BPM

Active Publication Date: 2012-07-11
BEIJING BAIDU NETCOM SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing analysis method is obviously related to the position of the selected music clip, and it is difficult to guarantee the accuracy of the analyzed BPM for randomly selected music clips

Method used

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  • Method and device for analyzing music BPM (Beat Per Minutes)
  • Method and device for analyzing music BPM (Beat Per Minutes)
  • Method and device for analyzing music BPM (Beat Per Minutes)

Examples

Experimental program
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Effect test

Embodiment 1

[0076] figure 1 The flow chart of the method for analyzing music BPM provided by Embodiment 1 of the present invention, such as figure 1 As shown, the method may include the following steps:

[0077] Step 101: Identify N music segments of preset segment types from the music to be analyzed, where N is a preset positive integer, and the preset segment types include at least one of chorus, interlude and verse.

[0078] Taking popular music as an example, music can usually be divided into prelude, verse, chorus, interlude and ending, etc. Among them, the chorus has the strongest sense of rhythm and strength, and is the best music segment for analyzing BPM. The interlude part usually has no vocals and only instrumental accompaniment, and the effect of BPM analysis is second. The rhythm and strength of the verse part are not as good as the chorus part, and the analysis effect is not as good as the chorus part and the interlude part, but it can also be used as a music fragment for ...

Embodiment 2

[0100]Usually the music has a strong sense of rhythm, and when the rhythm and drum beats are very obvious, the rhythmic periodicity of the signal is also obvious. Using the existing BPM calculation method to calculate the BPM of the music clip can get good results. However, when the music accompaniment is weak or even without accompaniment, this periodicity is very inconspicuous, and it is often difficult to obtain an accurate BPM value if the existing method is adopted. In this embodiment, the method of "three-beat / two-beat judgment + pause detection" can well solve this problem.

[0101] figure 2 The flow chart of the method for calculating the BPM of the music segment provided by Embodiment 2 of the present invention, such as figure 2 As shown, the method may include the following steps:

[0102] Step 201: Perform a peak search on the autocorrelation function of the music piece, and determine the music beat system to which the music piece belongs.

[0103] The specific...

Embodiment 3

[0129] Figure 4 The structure diagram of the device for analyzing music BPM provided by Embodiment 3 of the present invention, such as Figure 4 As shown, the apparatus may include: a segment selection unit 400 , a BPM calculation unit 410 and a BPM fusion unit 420 .

[0130] The segment selection unit 400 is used to identify music segments of N preset segment types from the music to be analyzed, N is a preset positive integer, and the preset segment types include at least one of chorus, interlude and verse .

[0131] Among them, the chorus part has the strongest sense of rhythm and the greatest strength, and it is the best music segment for analyzing BPM. The interlude part usually has no vocals and only instrumental accompaniment, and the effect of BPM analysis is second. The rhythm and strength of the verse part are not as good as the chorus part, and the analysis effect is not as good as the chorus part and the interlude part, but it can also be used as a music fragmen...

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Abstract

The invention provides a method and a device for analyzing music BPM (Beat Per Minutes). The method comprises the following steps: S1. identifying musical clips of N preset clip types from music to be analyzed, wherein N is a preset positive integer, and the preset clip type is at least one of refrain, interlude and verse; S2. respectively calculating BPM for each musical clip; and S3. combining BPM calculated for all musical clips to obtain the BPM of music to be identified. According to the method and the device, the accuracy of the BPM of the analyzed music can be improved.

Description

【Technical field】 [0001] The invention relates to computer processing technology, in particular to a method and device for analyzing beats per minute (BPM, Beat Per Minute) of music. 【Background technique】 [0002] BPM is one of the important attributes of music. It identifies the beats per minute of music and plays an important role in applications such as audio analysis, personalized music recommendation, and music classification. For example, in the application of the musical instrument digital interface (MIDI), the speed of the MIDI sequencer can be synchronized with an existing track through BPM; in the music database system, the music can be classified and retrieved according to the BPM. In a DJ application, the BPM values ​​of two music sources can be compared in order to seamlessly transition from one music source to another, and so on. [0003] The existing BPM analysis technology usually selects some music fragments at random, uses the correlation of the signal to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10H1/00
Inventor 宋辉
Owner BEIJING BAIDU NETCOM SCI & TECH CO LTD
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