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Method, device and system for extracting chorus of song

A technology for chorus and song, which is applied in the field of song chorus extraction, which can solve the problem of inaccurate extraction of chorus parts, and achieve the effect of flexible and accurate extraction

Inactive Publication Date: 2013-01-30
HUAWEI TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in fact, the beat of the song is not fixed, so this scheme cannot accurately extract the chorus part

Method used

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  • Method, device and system for extracting chorus of song
  • Method, device and system for extracting chorus of song
  • Method, device and system for extracting chorus of song

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment will be described from the perspective of the chorus extraction device. The chorus extracting device may specifically be a computer.

[0041] A method for extracting the chorus of a song, comprising: obtaining an audio signal, performing beat tracking on the audio signal, obtaining a beat tracking result, extracting a timbre (chroma) feature vector in units of beats according to the beat tracking result, and selecting according to the chroma feature vector The estimated chorus segment is used to score the estimated chorus segment according to preset conditions to obtain a scoring result, and select the chorus from the estimated chorus segment according to the scoring result.

[0042] Such as figure 1 As shown, the specific process can be as follows:

[0043] 101. Acquire an audio signal; for example, read an audio file, such as a popular song, and the audio file may be read automatically by the system or input by a user.

[0044] 102. Perform beat tra...

Embodiment 2

[0084] According to the method described in the embodiment, the following examples will be used for further detailed description.

[0085] Such as figure 2 As shown, the specific process can be as follows:

[0086] 201. The chorus extracting device acquires an audio signal, for example, reads an audio file that needs to extract the chorus.

[0087] It should be noted that the encoding format of the audio file needs to be the encoding format supported by the chorus extracting device, for example, if the default encoding format supported by the chorus extracting device is the wave format data (wav, Wave) format , you need to convert the audio file to wav format first. So, after reading the audio file that needs to extract the chorus, optionally, you can also include:

[0088] The read audio file is converted into an encoding format supported by the chorus extraction device.

[0089] 202. The chorus extraction device performs beat tracking on the acquired audio signal to obt...

Embodiment 3

[0157] In order to better realize the above method, the embodiment of the present invention also provides a corresponding chorus extraction device, such as image 3 As shown, the chorus extraction device includes an acquisition unit 301, a beat tracking unit 302, a feature extraction unit 303, an estimation unit 304, a scoring unit 305 and a selection unit 306;

[0158] The acquiring unit 301 is configured to acquire an audio signal; for example, to read an audio file, such as a pop song, and the audio file can be read automatically by the system or input by a user.

[0159] A tempo tracking unit 302, configured to perform tempo tracking on the audio signal acquired by the acquiring unit 301, to obtain a tempo tracking result;

[0160] The feature extraction unit 303 is used to extract the chroma feature vector in units of beats according to the beat tracking result obtained by the beat tracking unit 302;

[0161] The estimation unit 304 is used to select the chorus estimatio...

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Abstract

An embodiment of the invention discloses a method, a device and a system for extracting the chorus of a song. An acquired audio signal is subjected to beat tracking, and eigenvectors of chroma are extracted in beats according to beat tracking results. A chorus estimation segment is selected according to the eigenvectors of the chroma and is then graded according to preconditions. The chorus is selected from the chorus estimation segment according to a grading result. The beat of the song can be tracked, and the eigenvectors of the chroma are the extracted according to the beat of the song so as to extract the chorus. Therefore, compared with the prior part using traditional methods, the method, device and system can better satisfy the needs of songs in different beats and can be used to extract the chorus more flexibly and accurately.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method, device and system for extracting chorus of a song. Background technique [0002] Usually, a song is composed of certain structural paragraphs, including prelude, verse, chorus, interlude, etc. The chorus is usually repeated 2 to 3 times, and its melody and lyrics are very similar, forming the most memorable part of popular songs, giving the listener a feeling that the song has reached a "climax". Therefore, the chorus can be called the "most representative" and "most attractive" part of a song. In addition, the length of the chorus fragment is significantly shorter than the length of the entire song, so the chorus fragment can serve as an effective marker of a song. [0003] As a symbol of a song, if the chorus part can be accurately extracted, it will have a broad commercial application prospect in music summary and CRBT. However, the complexity of the signal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10H1/40G10H7/10G10L15/02
Inventor 李伟梁达文顾旻玮杨素娟
Owner HUAWEI TECH CO LTD