CN102103853A - Method for weakening voice in songs - Google Patents
Method for weakening voice in songs Download PDFInfo
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- CN102103853A CN102103853A CN2009103117995A CN200910311799A CN102103853A CN 102103853 A CN102103853 A CN 102103853A CN 2009103117995 A CN2009103117995 A CN 2009103117995A CN 200910311799 A CN200910311799 A CN 200910311799A CN 102103853 A CN102103853 A CN 102103853A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000003313 weakening effect Effects 0.000 title abstract 5
- 230000008033 biological extinction Effects 0.000 claims abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
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Abstract
The invention provides a method for weakening voice in songs, in which a channel mixer is used. The method for weakening voice in songs comprises the steps of: A: inputting a left channel signal Left and a right channel signal Right of an original song into the channel mixer; B. processing the left channel signal Left and the right channel signal Right by the channel mixer; and C. outputting the signals of the song in which the voice is weakened by the channel mixer; wherein the signals of the song include a left channel signal newLeft and a right channel signal newRight. In the Step B, the processing formula of the channel mixer is that newLeft=100*Left-eta*Right, and newRight=+/-(eta*Left-100*Right), wherein eta is the extinction coefficient, and is not less than 0 and not more than 100. The method for weakening voice in songs has the benefit of processing the original left channel signal and the right channel signal by adopting the channel mixer according to the formula so as to obtain sounds of different extinction coefficients. The method provided by the invention is used for weakening voice in songs, is simple to realize, and can better reduce the cost of projects.
Description
[technical field]
The present invention relates to the acoustic processing technical field, particularly a kind of method that slackens voice in the song.
[background technology]
People usually wish to change the voice of playing according to individual demand when enjoying song or sing karaoke, and still, existing elimination voice mode complex structure, operand are big, and can not partly slacken voice.
[summary of the invention]
In order to solve existing technical matters, the invention provides a kind of method of utilizing channel-mixer freely to slacken voice in the song by slackening coefficient.
The present invention solves existing technical matters, and a kind of method that slackens voice in the song is provided, and this method comprises channel-mixer; Step is as follows: A, and the left channel signals Left of original song and right-channel signals Right input to described channel-mixer; B, described left channel signals Left and right-channel signals Right are through the processing of described channel-mixer; C, described channel-mixer output slackens the later song signal of voice, and this song signal comprises left channel signals newLeft and right-channel signals newRight; In step B, the processing formula of described channel-mixer is newLeft=100 * Left-η * Right, and newRight=± (η * Left-100 * Right), wherein, η is an extinction coefficient, 0≤η 〉=100.
The present invention further improves:
Also comprise step D:D, pass through loudspeaker plays through the song signal behind the step C.
Described loudspeaker is a mono speaker, this moment newRight=-(η * Left-100 * Right).
Described loudspeaker is a two-way speaker, this moment newRight=+ (η * Left-100 * Right).
100% voice is eliminated in η=100 o'clock.
η=80 o'clock slacken 80% voice.
η=50 o'clock slacken 50% voice.
Compared to prior art, the invention has the beneficial effects as follows: adopt channel-mixer, original left sound channel signal and right-channel signals are handled according to formula, thereby obtained the sound that difference slackens coefficient.Utilize the present invention program to slacken voice, realize simply more can reducing project cost.
[description of drawings]
Fig. 1 is for slackening the process flow diagram of people's method for acoustic in the song of the present invention.
[embodiment]
The present invention is further described below in conjunction with description of drawings and embodiment.
As shown in Figure 1, a kind of method that slackens voice in the song, this method comprise channel-mixer (not shown go out), and this channel-mixer can be carried out computing according to setting formula to voice signal; This method step is as follows: A, and the left channel signals Left of original song and right-channel signals Right input to described channel-mixer; B, described left channel signals Left and right-channel signals Right are through the processing of described channel-mixer; C, described channel-mixer output slackens the later song signal of voice, and this song signal comprises left channel signals newLeft and right-channel signals newRight; In step B, the processing formula of described channel-mixer is newLeft=100 * Left-η * Right, and newRight=± (η * Left-100 * Right), wherein, η is that extinction coefficient does not have unit, 0≤η 〉=100.
The left and right acoustic channels sound that the present invention is based on stereo music is different, because the various musical instruments in the song all divide to be placed in the left and right acoustic channels; But voice is just the same at left and right acoustic channels.The voice signal of left and right acoustic channels in the song is subtracted each other in employing, and identical people's acoustical signal of having equally of left and right acoustic channels is slackened so, and other musical instrument is because different in two sound channels, so still be retained after subtracting each other.In addition, for the bass part in the song of subtracting each other time loss, i.e. the sound of the following frequency range of 400Hz, the bass as drum or bass are formed compensates it.
Channel-mixer is used four parameters, is respectively:
The shared percentage a1 of former L channel in the new L channel;
The shared percentage a2 of former R channel in the new L channel;
The shared percentage b1 of former L channel in the new R channel;
The shared percentage b2 of former R channel in the new R channel;
All between-100 to 100, the voice signal that obtains after calculation process is the numerical value of this four number of a1, a2, b1 and b2:
newLeft＝a1×Left+a2×Right；
newRight＝b1×Left+b2×Right；
In order to realize that sound channel subtracts each other, a1 and b2 are set at 100, (a2) and (b1) be set at η according to user's request.
The embodiment of the invention is as follows:
Also comprise step D:D, play by mono speaker through the song signal behind the step C.
At this moment, the operational formula of this channel-mixer is as follows:
newLeft＝100×Left=-η×Right
newRight＝-(η×Left-100×Right)。
The another embodiment of the present invention is as follows:
Play by two-way speaker through the song signal behind the step C.
At this moment, the operational formula of this channel-mixer is as follows:
newLeft＝100×Left-η×Right，
newRight＝+(η×Left-100×Right)。
Channel-mixer of the present invention adopts aforesaid way, according to concrete use needs, freely sets voice and slackens.As eliminate 100% voice, this moment η=100; Slacken 80% voice, at this moment η=80; Slacken 50% voice, at this moment η=50.
The present invention adopts channel-mixer, original left sound channel signal and right-channel signals is handled according to formula, thereby obtained the sound that difference slackens coefficient.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (7)
1. a method that slackens voice in the song is characterized in that, this method comprises channel-mixer; Step is as follows:
A, the left channel signals Left of original song and right-channel signals Right input to described channel-mixer;
B, described left channel signals Left and right-channel signals Right are through the processing of described channel-mixer;
C, described channel-mixer output slackens the later song signal of voice, and this song signal comprises left channel signals newLeft and right-channel signals newRight;
In step B, the processing formula of described channel-mixer is
newLeft＝100×Left-η×Right
newRight＝±(η×Left-100×Right)
Wherein, η is an extinction coefficient, 0≤η 〉=100.
2. the method that slackens voice in the song according to claim 1 is characterized in that: also comprise step D:D, pass through loudspeaker plays through the song signal behind the step C.
3. the method that slackens voice in the song according to claim 2 is characterized in that: described loudspeaker is a mono speaker, this moment newRight=-(η * Left-100 * Right).
4. the method that slackens voice in the song according to claim 2 is characterized in that: described loudspeaker is a two-way speaker, this moment newRight=+ (η * Left-100 * Right).
5. according to any described method that slackens voice in the song of claim 1 to 4, it is characterized in that: η=100 o'clock, eliminate 100% voice.
6. according to any described method that slackens voice in the song of claim 1 to 4, it is characterized in that: η=80 o'clock slacken 80% voice.
7. according to any described method that slackens voice in the song of claim 1 to 4, it is characterized in that: η=50 o'clock slacken 50% voice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910311799.5A CN102103853B (en) | 2009-12-18 | 2009-12-18 | Method for weakening voice in songs |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910311799.5A CN102103853B (en) | 2009-12-18 | 2009-12-18 | Method for weakening voice in songs |
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| CN102103853A true CN102103853A (en) | 2011-06-22 |
| CN102103853B CN102103853B (en) | 2014-02-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108389568A (en) * | 2018-05-07 | 2018-08-10 | 深圳乐华高科实业有限公司 | A kind of karaoke OK system and its application method of the automatic voice that disappears |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5428184A (en) * | 1992-02-28 | 1995-06-27 | Samsung Electronics Co., Ltd. | Karaoke circuit for optical disk player |
| CN1941073A (en) * | 2005-09-26 | 2007-04-04 | 三星电子株式会社 | Apparatus and method of canceling vocal component in an audio signal |
| CN101577117A (en) * | 2009-03-12 | 2009-11-11 | 北京中星微电子有限公司 | Extracting method of accompaniment music and device |
-
2009
- 2009-12-18 CN CN200910311799.5A patent/CN102103853B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5428184A (en) * | 1992-02-28 | 1995-06-27 | Samsung Electronics Co., Ltd. | Karaoke circuit for optical disk player |
| CN1941073A (en) * | 2005-09-26 | 2007-04-04 | 三星电子株式会社 | Apparatus and method of canceling vocal component in an audio signal |
| CN101577117A (en) * | 2009-03-12 | 2009-11-11 | 北京中星微电子有限公司 | Extracting method of accompaniment music and device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108389568A (en) * | 2018-05-07 | 2018-08-10 | 深圳乐华高科实业有限公司 | A kind of karaoke OK system and its application method of the automatic voice that disappears |
| CN108389568B (en) * | 2018-05-07 | 2023-11-10 | 深圳乐华高科实业有限公司 | Karaoke system capable of automatically eliminating voice |
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| Publication number | Publication date |
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| CN102103853B (en) | 2014-02-12 |
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