CN101227763B - Method and device for processing sound effect - Google Patents
Method and device for processing sound effect Download PDFInfo
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- CN101227763B CN101227763B CN 200710036465 CN200710036465A CN101227763B CN 101227763 B CN101227763 B CN 101227763B CN 200710036465 CN200710036465 CN 200710036465 CN 200710036465 A CN200710036465 A CN 200710036465A CN 101227763 B CN101227763 B CN 101227763B
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Abstract
The invention discloses a device for processing audio effects, which comprises a zoning filter module and a sub band grouping module which divide received audio signals into a plurality of sub bands according to frequency differences and output the signals, wherein the sub band grouping module superposites signals of all odd number sub bands to obtain a first sound channel signal, superposites the signals of all sub bands whose serial numbers are even numbers to obtain a second sound channel signal, and outputs the first sound channel signal and the second sound channel signal. The invention also discloses a method for processing the audio effects, which comprises dividing the audio signals which will be processed into a plurality of sub bands according to the frequency differences, superpositing the signals of all odd number sub bands to be the first sound channel signal, and superpositing the signals of all even number sub bands to be the second sound channel signal. The invention enlarges the differences of signals which are received by a left ear and a right ear, and thereby human is enabled to have dreamland sense.
Description
Technical field
The present invention relates to a kind of sound-effect processing equipment.The invention still further relates to a kind of sound effect treatment method.
Background technology
The type of audio treatment technology and music is closely related.For example, for people's song, suitably use reverberation to process and to make sound fuller; For finger-popping music, suitably use bass to strengthen processing and can make rhythm clearer and more definite.At present, along with the dance of shaking the head waits the fashionable of disco dancing, many people like shaking the head in music and dance, and know from experience a kind of dizzy and hazy and illusionary effect.If can to this class music in addition certain audio process, it is sounded makes the people dizzy and hazy and illusionary, be subject to these people's welcome when meeting.
The vestibular organ of people Er Nei and dizzyly feel closely related.Vestibular is arranged in inner ear, is the statoreceptor official of people's ear.Vestibular in each is picked up the ears can be experienced respectively human motion information, and the informix of both sides vestibular can be determined human behavior (stand or crouch, static or motion).Yet if the movable information that the both sides vestibular feeds back is inconsistent, the people just may produce spinning sensation.For example, in the time of by bus, because the actions such as vehicle jolts, turning may make the both sides vestibular perceive different movable informations, thereby make the people dizzy.Carsick phenomenon that Here it is.
Because vestibular is arranged in inner ear, therefore acoustic stimuli also have certain influence to it.If continue to make two ears to accept inconsistent stimulation, the people also will produce dizzy sensation, this slight dizzy a kind of hazy and illusionary sensation that is easy to become.Because dizzy sensation and hazy and illusionary sensation are difficult to distinguish, in the narration hereinafter the two is referred to as hazy and illusionary sense.
Summary of the invention
Technical problem to be solved by this invention provides a kind of sound-effect processing equipment, by the processing to audio signal, and the difference of two signals that ear is listened about increasing, thus make the people have hazy and illusionary sense; For this reason, the present invention also provides a kind of sound effect treatment method.
For solving the problems of the technologies described above, the technical scheme of sound-effect processing equipment of the present invention is to comprise:
Minute band filtration module includes the band-splitting filter group, the audio signal that receives is divided into a plurality of subbands according to the difference of frequency, and by the order of frequency described a plurality of subbands is exported;
The subband grouping module, be connected with described minute band filtration module, receive described minute with a plurality of subbands of filtration module by frequency order output, be that the signal of the subband of odd number superposes and obtains the first sound channel signal with all sequence numbers, be that the signal of the subband of even number superposes and obtains the second sound channel signal with all sequence numbers, with described the first sound channel signal and the output of described second sound channel signal.
Utilize above-mentioned sound-effect processing equipment, the technical scheme of sound effect treatment method of the present invention is to comprise the steps:
(1) according to the difference of frequency, pending audio signal is divided into a plurality of subbands, and according to frequency described subband is sorted;
(2) being that the signal of the subband of odd number superposes to all sequence numbers, as the first sound channel signal, is that the signal of the subband of even number superposes to all sequence numbers, as the second sound channel signal.
The present invention is by decomposing by frequency audio signal, and the subband after will decomposing afterwards is that odd number or even number superpose by sequence number, forms two new audio signal outputs, the difference of two signals that ear is listened about having strengthened, thus make the people have hazy and illusionary sense.
Description of drawings
The present invention is further detailed explanation below in conjunction with drawings and Examples:
Fig. 1 is the module diagram of sound-effect processing equipment of the present invention;
Fig. 2 is the schematic diagram that sound-effect processing equipment of the present invention is provided with the subband handover module;
Fig. 3 is the schematic diagram of sound effect treatment method work of the present invention;
Fig. 4 carries out the schematic diagram that subband switches in the sound effect treatment method of the present invention.
Embodiment
The invention provides a kind of sound-effect processing equipment, as shown in Figure 1, it comprises:
Minute band filtration module includes the band-splitting filter group, the audio signal that receives is divided into a plurality of subbands according to the difference of frequency, and by the order of frequency described a plurality of subbands is exported;
The subband grouping module, be connected with described minute band filtration module, receive described minute with a plurality of subbands of filtration module by frequency order output, be that the signal of the subband of odd number superposes and obtains the first sound channel signal with all sequence numbers, be that the signal of the subband of even number superposes and obtains the second sound channel signal with all sequence numbers, with described the first sound channel signal and the output of described second sound channel signal.
Sound-effect processing equipment of the present invention also comprises pretreatment module, and described pretreatment module directly is transferred to described minute band filtration module with monaural audio signal; Obtain monaural audio signal after the audio signal stack of described pretreatment module with dual track or multichannel, and should monaural audio signal transmission give described minute band filtration module.
As shown in Figure 2, the first sound channel signal output part and the second sound channel signal output part of described subband grouping module also are connected with the subband handover module, described subband handover module is provided with the switch-over control signal input, described subband handover module is according to switch-over control signal, described the first sound channel signal and described second sound channel signal are exchanged and export, being about to all sequence numbers and being signal that the signal stack of the subband of odd number obtains as the output of second sound channel signal, is that the signal that the signal stack of the subband of even number obtains is exported as the first sound channel signal with all sequence numbers.
The present invention also provides a kind of sound effect treatment method that utilizes above-mentioned sound-effect processing equipment to realize, comprises the steps:
(1) according to the difference of frequency, pending audio signal is divided into a plurality of subbands, and according to frequency described subband is sorted;
(2) being that the signal of the subband of odd number superposes to all sequence numbers, as the first sound channel signal, is that the signal of the subband of even number superposes to all sequence numbers, as the second sound channel signal.
For example, with described subband according to the ordering of the height of frequency content, with first, the 3rd ... be classified as one group Deng the odd number subband, second, the 4th ... be classified as one group Deng the even number subband.With described odd number subband signal as the first sound channel signal, with described even number subband signal as the second sound channel signal, and respectively output.The quantity of described subband is more than or equal to 16.Described number of sub-bands is more, and the fidelity of the signal of two sound channels of output is just better, and treatment effect is also just better.
Described the first sound channel signal can be used as R channel, and described second sound channel signal is just as L channel; Also can described the first sound channel signal as L channel, described second sound channel signal is as R channel.As shown in Figure 3, take described the first sound channel signal as R channel as example, the audio frequency that auris dextra is heard only comprises the odd number subband composition of former monophonic audio, the audio frequency that left ear is heard only comprises the even number subband composition of former monophonic audio.Therefore, on each frequency band, people's ear all is to only have one-sided the stimulation, and on the different frequencies, the one-sided ear that is stimulated is different.Audio frequency after processing like this very easily makes the people produce hazy and illusionary sense.
In described step (1) before, also comprise described pending audio signal is carried out pretreated step: if when described pending audio signal is monophony, directly carry out step (1); When if described pending audio signal is dual track or multichannel, the audio signal of each sound channel is superposeed obtain a monaural audio signal first, carry out afterwards step (1).
In the described step (1), according to the difference of frequency, pending audio signal is divided into a plurality of subbands, the division methods of described subband is to carry out linear partition according to frequency, or carries out logarithm according to frequency and divide.
Because the lasting stimulation that the people inputs to external world is easy to adapt to, therefore, above-mentioned minute barbed goading into action along with the time weakens gradually.For this reason, can be constantly the frequency band of left and right sides ear be exchanged.After a period of time, described the first sound channel signal and described second sound channel signal are exchanged, the signal that is about to all sequence numbers and is the subband of odd number superposes the audio signal that obtains as the second sound channel signal, is that the signal of the subband of even number superposes the audio signal that obtains as the first sound channel signal with all sequence numbers.The switching of described the first sound channel signal and described second sound channel signal is moved according to switch-over control signal by described subband handover module.As shown in Figure 4, if a certain moment is sent to auris dextra with odd number band audio frequency (grid of the left oblique line of Fig. 4), even number band audio frequency (grid of the right oblique line of Fig. 4) is sent to left ear, then after after a while, even number band audio frequency should be sent to auris dextra, odd number band audio frequency is sent to left ear.Vice versa.Like this, the suffered imbalance of ears stimulates all the time and is changing, and the people will be difficult to such stimulation is produced adaptation, therefore will remain stronger hazy and illusionary effect.The subband switching frequency is about per second once, or the several seconds once.The time interval of switching both can equate at every turn, also can be random.
The first sound channel signal that the present invention generates and second sound channel signal using earphone to play, also can use audio amplifier or other audio-frequence player device to play, the difference of two signals that ear is listened about the present invention has strengthened, thus make the people have hazy and illusionary sense.
Claims (7)
1. a sound-effect processing equipment is characterized in that, comprising:
Minute band filtration module includes the band-splitting filter group, the audio signal that receives is divided into a plurality of subbands according to the difference of frequency, and by the order of frequency described a plurality of subbands is exported;
The subband grouping module, be connected with described minute band filtration module, receive described minute with a plurality of subbands of filtration module by frequency order output, be that the signal of the subband of odd number superposes and obtains the first sound channel signal with all sequence numbers, be that the signal of the subband of even number superposes and obtains the second sound channel signal with all sequence numbers, with described the first sound channel signal and the output of described second sound channel signal.
2. sound-effect processing equipment according to claim 1 is characterized in that, also comprises pretreatment module, and described pretreatment module directly is transferred to described minute band filtration module with monaural audio signal; Obtain monaural audio signal after the audio signal stack of described pretreatment module with dual track or multichannel, and should monaural audio signal transmission give described minute band filtration module.
3. sound-effect processing equipment according to claim 1, it is characterized in that, the first sound channel signal output part and the second sound channel signal output part of described subband grouping module also are connected with the subband handover module, described subband handover module is provided with the switch-over control signal input, described subband handover module is according to switch-over control signal, described the first sound channel signal and described second sound channel signal are exchanged and export, being about to all sequence numbers and being signal that the signal stack of the subband of odd number obtains as the output of second sound channel signal, is that the signal that the signal stack of the subband of even number obtains is exported as the first sound channel signal with all sequence numbers.
4. a sound effect treatment method that utilizes sound-effect processing equipment as claimed in claim 1 to realize is characterized in that, comprises the steps:
(1) according to the difference of frequency, pending audio signal is divided into a plurality of subbands, and according to frequency described subband is sorted;
(2) being that the signal of the subband of odd number superposes to all sequence numbers, as the first sound channel signal, is that the signal of the subband of even number superposes to all sequence numbers, as the second sound channel signal.
5. sound effect treatment method according to claim 4 is characterized in that, in the step (1), difference according to frequency, pending audio signal is divided into a plurality of subbands, and the division methods of described subband is to carry out linear partition according to frequency, or carries out logarithm according to frequency and divide.
6. sound effect treatment method according to claim 4, it is characterized in that, after a period of time, described the first sound channel signal and described second sound channel signal are exchanged, the signal that is about to all sequence numbers and is the subband of odd number superposes the audio signal that obtains as the second sound channel signal, is that the signal of the subband of even number superposes the audio signal that obtains as the first sound channel signal with all sequence numbers.
7. sound effect treatment method according to claim 4 is characterized in that, the quantity of described subband is more than or equal to 16.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710036465 CN101227763B (en) | 2007-01-15 | 2007-01-15 | Method and device for processing sound effect |
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| CN 200710036465 CN101227763B (en) | 2007-01-15 | 2007-01-15 | Method and device for processing sound effect |
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| CN101227763B true CN101227763B (en) | 2013-01-23 |
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| US11665482B2 (en) | 2011-12-23 | 2023-05-30 | Shenzhen Shokz Co., Ltd. | Bone conduction speaker and compound vibration device thereof |
| KR102568044B1 (en) | 2018-09-12 | 2023-08-21 | 썬전 샥 컴퍼니 리미티드 | Signal processing device with multiple acousto-electrical transducers |
| CN112133267B (en) * | 2020-09-04 | 2024-02-13 | 腾讯音乐娱乐科技（深圳）有限公司 | Audio effect processing method, device and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1479199A (en) * | 2002-08-30 | 2004-03-03 | 志合电脑股份有限公司 | Method and system for producing sound effect |
| WO2005006766A1 (en) * | 2003-07-09 | 2005-01-20 | Nec Corporation | Moving picture encoding method, moving picture decoding method, moving picture encoding device, moving picture decoding device, and computer program |
| CN1763707A (en) * | 2004-10-20 | 2006-04-26 | 宇力电子股份有限公司 | Sound effect processing circuit |
| CN1831797A (en) * | 2005-12-22 | 2006-09-13 | 北京中星微电子有限公司 | Audio processor and its control method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1479199A (en) * | 2002-08-30 | 2004-03-03 | 志合电脑股份有限公司 | Method and system for producing sound effect |
| WO2005006766A1 (en) * | 2003-07-09 | 2005-01-20 | Nec Corporation | Moving picture encoding method, moving picture decoding method, moving picture encoding device, moving picture decoding device, and computer program |
| CN1763707A (en) * | 2004-10-20 | 2006-04-26 | 宇力电子股份有限公司 | Sound effect processing circuit |
| CN1831797A (en) * | 2005-12-22 | 2006-09-13 | 北京中星微电子有限公司 | Audio processor and its control method |
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