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Extracting method of accompaniment music and device

A music and audio technology, applied in the field of accompaniment music extraction, can solve problems such as the degradation of the sound quality of accompaniment music

Active Publication Date: 2009-11-11
JIANGSU DAHAI INTELLIGENT SYST
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  • Description
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AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a method and device for extracting accompaniment music, which solves the problem in the prior art that the sound quality of the accompaniment music is reduced when the voice is eliminated, can effectively eliminate the voice in the song, and obtain the accompaniment music with good sound quality

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  • Extracting method of accompaniment music and device
  • Extracting method of accompaniment music and device
  • Extracting method of accompaniment music and device

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Embodiment Construction

[0064] The accompaniment music extraction method provided by the embodiment of the present invention determines the cancellation gain parameter and The output gain parameter performs cancellation and output gain calculation on the corresponding audio signal frames of the left and right channels to obtain the output signals of the left and right channels, and finally obtains the accompaniment music containing only pure music. Its process is as follows figure 2 shown, including the following steps:

[0065] Step S101: Acquiring synthesized audio signal frames in the song to be processed.

[0066] Wherein, the synthesized audio signal frame is synthesized by the audio signal frame of the left channel of the song to be processed and the corresponding audio signal frame of the right channel.

[0067] The actual acquisition process can be to extract the audio signal frame of the left channel of the song to be processed and the corresponding audio signal frame of the right channel...

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Abstract

The invention discloses an extracting method of accompaniment music and a device. The method comprises the following steps of: acquiring a synthetic audio-frequency signal frame in a song to be processed, wherein the synthetic audio-frequency signal frame is synthesized by an audio-frequency signal frame of a left channel and a corresponding audio-frequency signal frame of a right channel of the song; determining that the audio-frequency type of the synthetic audio-frequency signal frame is voice, music or combination of voice and music; setting offset gain parameters and output gain parameters according to the determined audio-frequency type; controlling the offset of the audio-frequency signal frame of the left channel and the corresponding audio-frequency signal frame of the right channel by the offset gain parameters, using the audio-frequency signal frame after the output gain parameters are offset to carry out the calculation of the output gain, and obtaining output signal frames of the left channel and the right channel. The invention can effectively eliminate the voice in the song and obtain accompaniment music with excellent sound quality.

Description

technical field [0001] The invention relates to the field of signal processing, in particular to a method and a device for extracting accompaniment music from songs by using pattern classification technology. Background technique [0002] At present, some audio playback software or audio processing software already have the function of extracting the accompaniment from the song. The function of this function is to extract the accompaniment music from a song. For example, when you want to record a song you sang, but you can't find the accompaniment music for this song, you can use the function of extracting accompaniment from the song to separate and extract the accompaniment music from the original song. [0003] Since the human voice frequency is mainly concentrated in the low frequency, and the music frequency is widely distributed in the entire frequency band, the existing methods for extracting accompaniment music usually use the voice (that is, the human voice) in most ...

Claims

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Application Information

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IPC IPC(8): G10L15/08H04S1/00H04S7/00
Inventor 张晨
Owner JIANGSU DAHAI INTELLIGENT SYST
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