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Popular song key segment pick-up method for music listening

A technology of popular songs and extraction methods, applied in the field of music signal analysis, can solve the problem of not finding patents and reports

Inactive Publication Date: 2005-03-23
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention defines the key segment of music and proposes an algorithm for extracting the key segment. In all available patents or published documents, no similar patents and reports have been found.

Method used

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  • Popular song key segment pick-up method for music listening
  • Popular song key segment pick-up method for music listening
  • Popular song key segment pick-up method for music listening

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Embodiment Construction

[0054] The following describes each step in detail:

[0055] (1) Data segmentation

[0056] The data in WAV format is actually a series of waveform sampling points, each sampling point corresponds to a waveform amplitude, and its value is between -1 and +1. We first divide the whole music signal into several segments, each segment contains 11025 sampling points (1 second). In order to make the change of the eigenvalue obtained in the next step relatively stable, we take a segment every 2205 sampling points (0.2 seconds). In this way, two adjacent audio clips will contain 8820 (0.8 seconds) repeated sampling points.

[0057] (2) Short-term energy calculation

[0058] Then calculate the short-term energy value of the audio clip, the calculation formula is as follows:

[0059] E i = 1 N Σ m = 1 N ...

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Abstract

The method of extracting popular songs' key section is used in the music audition and belongs to the field of music signal analysis. It adopts the music signal of the WAV format with its sampling rate of 11025Hz and quantizing digit of 8 as the object, divides the music data stream into a series of frequency segments with fixed length, extracts the short time energy of every segment, groups the frequency segments in according to the time, counts the threshold value of the short time energy crossing the response curve, binarizates it, extracts the candidate key sections on the basis, puts the candidate key sections with appropriate length into the muster and finally chooses the highest average short time energy in the muster as the final popular songs' key section. Dealing with the 5-minute popular song in the Pentium IV 1,500M HZ CPU machine only needs 470 milliseconds. Except for the time of reading the data, the execution time only is 90 milliseconds, which realizes the aim to extract the key sections online and real time.

Description

technical field [0001] The invention relates to the field of music signal analysis, especially the definition and extraction of key sections of popular songs. Background technique: [0002] In modern society, pop music is more and more widely accepted by people. According to the survey on people's understanding of pop music, people are most impressed by the climax of pop music, and this climax can represent the type of the whole song. And contains most of the information of the song. To give an example, the song "My heart will go on", which was popular all over the world in 1998, contains "you are here, there's nothing I fear, and I know that my heart will go on; we'll stay forever this way, you are safe in my heart, and my heart will go on andon" is the most impressive part of the whole song, listeners can fully understand the theme of this love song and grasp most of the song when they hear this part information. Here, we define this climax as a key section of a song. ...

Claims

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Application Information

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IPC IPC(8): G06F17/00G10L25/00
Inventor 周杰张一彬冯上平李铸袁菡肖晶洁
Owner TSINGHUA UNIV
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