CN101944355B - Obbligato music generation device and realization method thereof - Google Patents
Obbligato music generation device and realization method thereof Download PDFInfo
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- CN101944355B CN101944355B CN 200910108575 CN200910108575A CN101944355B CN 101944355 B CN101944355 B CN 101944355B CN 200910108575 CN200910108575 CN 200910108575 CN 200910108575 A CN200910108575 A CN 200910108575A CN 101944355 B CN101944355 B CN 101944355B
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Abstract
The invention is suitable for the field of a sound processing technology and provides an obbligato music generation device and a realization method thereof, wherein the method comprises the steps of: a. copying a song for two copies and respectively placing on an audio track 1 and an audio track 2; b. carrying out high-frequency filtering on the song in the audio track 1, remaining the high frequency section of the song, eliminating the voice in the high frequency section of the song, carrying out low-frequency filtering of the song in the audio track 2 and remaining the low frequency section of the song; and c. carrying out the audio track mixing on the high frequency section and the low frequency section to generate obbligato music. The invention can ensure that the obbligato music can be generated according to the song; the voice in the song can be eliminated, and the low frequency section of the song can remain and the effect of the obbligato music can be regulated according to actual requirements.
Description
Technical field
The invention belongs to the acoustic processing technical field, relate in particular to a kind of Obbligato music generation device and its implementation.
Background technology
OK a karaoke club ok has become one of recreation and amusement mode that the consumer likes, and the realization of Karaoke be unable to do without accompaniment music.A lot of user habits so just need to be equipped with by the multimedia system sing karaoke in family the accompaniment music that gives song recitals.
Accompaniment music is normally by eliminating voice original singer in song, keeps that the method for music in song realizes, existing frequency is blocked with the method such as noise gate control can play the effect of eliminating voice on certain procedures, but is difficult to produce a desired effect.
Therefore, need a kind of technical scheme, can eliminate the voice original singer in song, keep music in song, thereby generate accompaniment music.
Summary of the invention
The object of the present invention is to provide a kind of Obbligato music generation device and its implementation, be intended to solve the problem that generates accompaniment music according to song.
The present invention is achieved in that a kind of Obbligato music generation device, and described Obbligato music generation device comprises replication module, high-pass filtering module, low-pass filtering module, sound channel mixing module and track mixing module, wherein:
Described replication module is used for song is copied into identical two parts, is placed on respectively track one and track two;
Described high-pass filtering module is used for to the song filtering in described track one, keeps the high frequency part of described song, and the high frequency of described song partly is transferred to described sound channel mixing module;
Described sound channel mixing module is used for the voice of described song high frequency part is eliminated, and the song high frequency of eliminating voice partly is transferred to described track mixing module;
Described low-pass filtering module is used for to the song filtering in described track two, keeps the low frequency part of described song, and the low frequency of described song partly is transferred to described track mixing module;
Described track mixing module is used for song high frequency part and the low frequency of described elimination voice are partly mixed, and generates accompaniment music;
Described high-pass filtering module to pass through frequency identical with the cutoff frequency of described low-pass filtering module;
Described sound channel mixing module subtracts each other to eliminate voice by the left and right acoustic channels waveform with described song high frequency part;
Described sound channel mixing module is eliminated voice in described song high frequency part according to sound channel hybrid parameter a1, a2, a3 and a4 value; Described sound channel hybrid parameter comprises: the shared percentage a4 of former R channel in the shared percentage a3 of former L channel, new R channel in the shared percentage a2 of former R channel, new R channel in the shared percentage a1 of former L channel, new L channel in new L channel; New L channel sampled value newLeft=a1*Left+a2*Right, new R channel sampled value newRight=a3*Left+a4*Right, wherein, Left is the L channel data that grasp after the original music decompress(ion), and Right is the right data that grasps after the original music decompress(ion); When mono speaker is play, with the sign-flip of described a3 and a4; When needs reserve part voice, reduce the percentage size of described a2 and a3.
More specifically, it also comprises the level control module, and described level control module is used for controlling the level of output accompaniment music, controls the size of accompaniment music volume.
A kind of method that the present invention also provides accompaniment music to generate, described method comprises:
A, song is copied identical two parts, be placed into respectively track one and track two;
B, the song in track one is carried out High frequency filter, keep song high frequency part, eliminates the voice of described song high frequency part, the song in track two is carried out low frequency filtering, keep the song low frequency partly;
C, song high frequency part and low frequency are partly carried out track mix, generate accompaniment music;
The voice of the described song high frequency part of the described elimination of step b specifically comprises: subtract each other to eliminate voice by the left and right acoustic channels waveform with described song high frequency part; Be specially, eliminate voice in described song high frequency part according to sound channel hybrid parameter a1, a2, a3 and a4 value;
Described sound channel hybrid parameter comprises: the shared percentage a4 of former R channel in the shared percentage a3 of former L channel, new R channel in the shared percentage a2 of former R channel, new R channel in the shared percentage a1 of former L channel, new L channel in new L channel; New L channel sampled value newLeft=a1*Left+a2*Right, new R channel sampled value newRight=a3*Left+a4*Right, wherein, Left is the L channel data that grasp after the original music decompress(ion), and Right is the right data that grasps after the original music decompress(ion); When mono speaker is play, with the sign-flip of described a3 and a4; When needs reserve part voice, reduce the percentage size of described a2 and a3.
More specifically, wherein step a also comprises:
Make the upper alignment of track one and two times of track.
More specifically, the cutoff frequency of described low-pass filtering can be adjusted according to the actual requirements by the user.
More specifically, wherein also comprise after step c:
D, the output level value that arranges according to the user are controlled the accompaniment music volume of output.
The present invention overcomes the deficiencies in the prior art, song is carried out the high frequency part that high-pass filtering obtains song, then the voice of song high frequency part is eliminated, in addition song is carried out the low frequency part that low-pass filtering obtains song, song low frequency part and the song high frequency of having eliminated voice are partly mixed, generate accompaniment music.Technical scheme provided by the invention can generate accompaniment music according to song, has both eliminated the voice in the song, has well kept again the low frequency part of song, and can adjust according to actual needs the effect of accompaniment music.
Description of drawings
Fig. 1 is the Obbligato music generation device system framework figure that the embodiment of the present invention provides;
Fig. 2 is embodiment of the present invention process flow diagram.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
Usually when recording disc, all take following mode to record: at first, first voice is recorded in a monaural track, this track is inserted in stereosonic accompanying song music again, so just, formed a complete song, if mixed contracting recording, normally with the track of voice on average in the accompaniment music of song, the sound wave of voice is identical in the sound channel of two of about song, the waveform of two sound channels in left and right can be subtracted each other if therefore want to eliminate voice.
But, due to by song bass part mainly by the drum or bass form, because the bass part of drum and bass is also basic identical at the waveform of left and right acoustic channels, if the method that about simple the employing, the waveform of two sound channels subtracts each other, also the bass part of music can be eliminated when eliminating voice, the bass part (mainly referring to the frequency range that 400hz is following) in song will be lost like this.Therefore, technical scheme provided by the invention subtracts each other at the waveform by two sound channels in left and right the compensation that also realizes in the process of eliminating voice bass.
Fig. 1 is the system framework figure of the Obbligato music generation device that provides of the embodiment of the present invention, comprises a replication module, a high-pass filtering module, a low-pass filtering module, a sound channel mixing module, a track mixing module and a level control module.
Wherein, replication module is connected with low-pass filtering module with the high-pass filtering module, be used for the song (comprising accompaniment music and voice original singer) of input is copied to track one and track two, guarantee that the song on track one and track two is identical, and guarantee track one and the upper alignment of two times of track;
Song on track one is transferred to the high-pass filtering module, and the high-pass filtering module is connected with the sound channel mixing module, is used for to song filtering, allows the HFS in song pass through, and the song high frequency that leaches partly is transferred to the sound channel mixing module;
The sound channel mixing module is connected with the track mixing module, is used for the voice in song radio-frequency head part is eliminated, and the method that adopts the waveform with the song left and right acoustic channels to subtract each other is transferred to the track mixing module with the song (high frequency part) of eliminating voice;
Song on track two is transferred to low-pass filtering module, and the low pass filtered mode is connected with the track mixing module, is used for to song filtering, allows the low frequency in song partly pass through, and the song low frequency that leaches partly is transferred to the track mixing module;
The track mixing module is connected with the level control module, and the song high frequency part and the low frequency that are used for eliminating voice partly mix, and generate the accompaniment music of eliminating voice;
The level control module is used for controlling the outputting music level, makes the volume of accompaniment music of generation identical with the waveform of original music, controls the size of accompaniment music volume, and the level in the level control module also can be regulated by the user.
The sound channel mixing module is mainly that the principle that adopts the left and right acoustic channels waveform with song to subtract each other reaches the purpose of eliminating voice, specifically can come regulating effect by four following major parameters (title sound channel hybrid parameter in the present invention):
1. the shared percentage a1 of former L channel in new L channel;
2. the shared percentage a2 of former R channel in new L channel;
3. the shared percentage a3 of former L channel in new R channel;
4. the shared percentage a4 of former R channel in new R channel;
The numerical value of a1, a2, these four parameters of a3, a4 is between-100 to 100, new L channel sampled value newLeft=a1*Left+a2*Right(wherein, Left is the L channel data that grasp after the original music decompress(ion), Right is the right data that grasps after the original music decompress(ion)), new R channel sampled value newRight=a3*Left+a4*Right(wherein, Left is the L channel data that grasp after the original music decompress(ion), and Right is the right data that grasps after the original music decompress(ion)).For the waveform of realizing left and right acoustic channels subtracts each other, sound channel hybrid parameter a1, a2, a3 and a4 value respectively are: 100 ,-100 ,-100 and 100, formula according to these four parameter values and above-mentioned new left and right acoustic channels sampled value, the left and right acoustic channels waveform that calculating makes new advances has generated a stereo waveform that the left and right acoustic channels waveform is opposite like this; But if play sound at mono speaker, the illusion of sound can appear not having in this case.In order to prevent this from occurring, with the R channel upset, four parameter values that are about to the sound channel mixing are set to respectively 100 ,-100,100 and-100.In actual use procedure, the user may want to keep the part voice in former song, the voice such as 20%, and the customized parameter value is 100 ,-80 ,-80 and 100, in a word, the user can realize different accompaniment effects by regulating these four parameters.
Concrete when using technical scheme provided by the invention, can be with the high-pass filtering module needs to be arranged to identical with the cutoff frequency of low-pass filtering module by frequency.
When the Obbligato music generation device that the embodiment of the present invention provides moves, at first by replication module, song is copied into identical two parts, be placed into respectively track one and track two, song in track one is carried out filtering by the high-pass filtering module, the high frequency part that keeps song, the mode of then being subtracted each other by the left and right acoustic channels waveform by the sound channel mixing module is eliminated the voice in song high frequency part, and the song high frequency that then will eliminate voice partly is transferred to the track mixing module; Song in track two is carried out filtering by low-pass filtering module, keeps the low frequency part of song, and the song low frequency partly is transferred to the track mixing module, and song high frequency part and song low frequency that the track mixing module will be eliminated voice partly mix, and generate accompaniment music.
For the effect that guarantees accompaniment music can be met consumers' demand, Obbligato music generation device provided by the invention can be adjusted according to actual needs by the user, be provided with three users in the embodiment of the present invention and regulate pattern: the user regulates 1 and is used for supplying the user to regulate the cutoff frequency of low-pass filtering module, if dissatisfied to low frequency loss part, can regulate by the user cutoff frequency of 1 adjustment low-pass filtering module; The user regulates 2 and is used for supplying the user to regulate four parameter values of sound channel mixing module, if the degree that the user eliminates voice is dissatisfied, can regulate 2 by the user and adjust four sound channel hybrid parameter values of sound channel mixing module, thereby realize voice eradicating efficacy in song radio-frequency head part is adjusted; The user regulates 3 and is used for supplying the user to adjust the sound size of accompaniment music.
Embodiment of the present invention process flow diagram specifically comprises the steps: as shown in Figure 2
1, song is copied identical two parts, be placed into respectively track one and track two, turn step 2 and step 4;
2, send the high-pass filtering module filtered with the song of track one, keep the high frequency part of song;
The mode of 3, being subtracted each other by the left and right acoustic channels waveform by the sound channel mixing module is eliminated the voice in song high frequency part, turns step 5;
4, the song in track two is carried out filtering by low-pass filtering module, keeps the low frequency part of song, turns step 5;
5, track mixing module song high frequency part and the song low frequency that will eliminate voice partly mixes, and generates accompaniment music;
6, is the user dissatisfied to accompaniment music low frequency loss part? if so, turn step 7, otherwise turn step 8;
7, adjust the user and regulate 1, turn step 8;
8, is the user dissatisfied to the degree of voice elimination? if so, turn step 9, otherwise turn step 10;
9, adjust the user and regulate 2, turn step 10;
10, is the user dissatisfied to the sound size of accompaniment music? if so, turn step 11, otherwise turn step 12;
11, adjust the user and regulate 3, turn step 12;
12, process ends.
The above is only preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., within all should being included in protection scope of the present invention.
Claims (6)
1. an Obbligato music generation device, is characterized in that, described Obbligato music generation device comprises replication module, high-pass filtering module, low-pass filtering module, sound channel mixing module and track mixing module, wherein:
Described replication module is used for song is copied into identical two parts, is placed on respectively track one and track two;
Described high-pass filtering module is used for to the song filtering in described track one, keeps the high frequency part of described song, and the high frequency of described song partly is transferred to described sound channel mixing module;
Described sound channel mixing module is used for the voice of described song high frequency part is eliminated, and the song high frequency of eliminating voice partly is transferred to described track mixing module;
Described low-pass filtering module is used for to the song filtering in described track two, keeps the low frequency part of described song, and the low frequency of described song partly is transferred to described track mixing module;
Described track mixing module is used for song high frequency part and the low frequency of described elimination voice are partly mixed, and generates accompaniment music;
Described high-pass filtering module to pass through frequency identical with the cutoff frequency of described low-pass filtering module;
Described sound channel mixing module subtracts each other to eliminate voice by the left and right acoustic channels waveform with described song high frequency part;
Described sound channel mixing module is eliminated voice in described song high frequency part according to sound channel hybrid parameter a1, a2, a3 and a4 value; Described sound channel hybrid parameter comprises: the shared percentage a4 of former R channel in the shared percentage a3 of former L channel, new R channel in the shared percentage a2 of former R channel, new R channel in the shared percentage a1 of former L channel, new L channel in new L channel; New L channel sampled value newLeft=a1*Left+a2*Right, new R channel sampled value newRight=a3*Left+a4*Right, wherein, Left is the L channel data that grasp after the original music decompress(ion), and Right is the right data that grasps after the original music decompress(ion); When mono speaker is play, with the sign-flip of described a3 and a4; When needs reserve part voice, reduce the percentage size of described a2 and a3.
2. Obbligato music generation device according to claim 1, is characterized in that, it also comprises the level control module, and described level control module is used for controlling the level of output accompaniment music, controls the size of accompaniment music volume.
3. the method that generates of an accompaniment music, described method comprises:
A, song is copied identical two parts, be placed into respectively track one and track two;
B, the song in track one is carried out High frequency filter, keep song high frequency part, eliminates the voice of described song high frequency part, the song in track two is carried out low frequency filtering, keep the song low frequency partly; High frequency filter to pass through frequency identical with the cutoff frequency of low-pass filtering;
C, song high frequency part and low frequency are partly carried out track mix, generate accompaniment music;
The voice of the described song high frequency part of the described elimination of step b specifically comprises: subtract each other to eliminate voice by the left and right acoustic channels waveform with described song high frequency part; Be specially, eliminate voice in described song high frequency part according to sound channel hybrid parameter a1, a2, a3 and a4 value;
Described sound channel hybrid parameter comprises: the shared percentage a4 of former R channel in the shared percentage a3 of former L channel, new R channel in the shared percentage a2 of former R channel, new R channel in the shared percentage a1 of former L channel, new L channel in new L channel; New L channel sampled value newLeft=a1*Left+a2*Right, new R channel sampled value newRight=a3*Left+a4*Right, wherein, Left is the L channel data that grasp after the original music decompress(ion), and Right is the right data that grasps after the original music decompress(ion); When mono speaker is play, with the sign-flip of described a3 and a4; When needs reserve part voice, reduce the percentage size of described a2 and a3.
4. method according to claim 3, is characterized in that, wherein step a also comprises:
Make the upper alignment of track one and two times of track.
5. method according to claim 3, is characterized in that, the cutoff frequency of described low-pass filtering can be adjusted according to the actual requirements by the user.
6. method according to claim 3, is characterized in that, wherein also comprises after step c:
D, the output level value that arranges according to the user are controlled the accompaniment music volume of output.
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| IES86526B2 (en) * | 2013-04-09 | 2015-04-08 | Score Music Interactive Ltd | A system and method for generating an audio file |
| CN103794205A (en) * | 2014-01-21 | 2014-05-14 | 深圳市中兴移动通信有限公司 | Method and device for automatically synthesizing matching music |
| CN103929182A (en) * | 2014-04-13 | 2014-07-16 | 郭昊 | Audio processing device, audio playing device and audio control method |
| CN105590633A (en) * | 2015-11-16 | 2016-05-18 | 福建省百利亨信息科技有限公司 | Method and device for generation of labeled melody for song scoring |
| CN106024005B (en) * | 2016-07-01 | 2018-09-25 | 腾讯科技（深圳）有限公司 | A kind of processing method and processing device of audio data |
| CN106875930B (en) * | 2017-02-09 | 2020-05-19 | 深圳市韵阳科技有限公司 | Light control method and system based on real-time detection of song accompanying sound and microphone voice |
| CN108962277A (en) * | 2018-07-20 | 2018-12-07 | 广州酷狗计算机科技有限公司 | Speech signal separation method, apparatus, computer equipment and storage medium |
| TWI751484B (en) * | 2020-02-04 | 2022-01-01 | 原相科技股份有限公司 | Method and electronic device for adjusting accompaniment music |
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| CN1592499A (en) * | 2003-09-01 | 2005-03-09 | 扬智科技股份有限公司 | Man sound eliminating method for stereophony and related apparatus |
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