CN107071639A - A kind of 3D audios based on head phase produce algorithm - Google Patents
A kind of 3D audios based on head phase produce algorithm Download PDFInfo
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- CN107071639A CN107071639A CN201710147042.1A CN201710147042A CN107071639A CN 107071639 A CN107071639 A CN 107071639A CN 201710147042 A CN201710147042 A CN 201710147042A CN 107071639 A CN107071639 A CN 107071639A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
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Abstract
The present invention relates to electroacoustic techniques field, specifically related to a kind of 3D audios based on head phase produce algorithm, its key step includes receiving distal end voice data, receiving pcm voice data by Neteq module solution RTP bag datas, 3D audio effect processing modules, and generation 3D audios, the audio data transmitting of generation 3D audios are sent to hardware broadcasting.The 3D audio effect processings module includes 3D audios pretreatment module and HRTF algoritic modules.The beneficial effects of the invention are as follows：The present invention to HRTF algoritic modules function by carrying out in-depth improvement, add 3D audio pretreatment modules, during personage's head rotation, the propagation starting point of sound source is predicted according to the angular acceleration of head rotation, 3D sound in following 10ms~60ms time is calculated in advance, largely reducing the delay of 3D sounds, there is provided the 3D sound experience instant to user.
Description
Technical field
The present invention relates to electroacoustic techniques field, specifically a kind of 3D audios based on head phase produce algorithm.
Background technology
3D audios, this effect looked such as magic is actually the performance of another surround sound, is not real
3D audio frequency effects performance.Essentially, what this technology was utilized is only some simple time delay circuits and wave filter.
In addition, left and right acoustic channels are mixed by it.Therefore, the brain of people can experience the openr effect of sound field change.This causes people non-
Advanced and professional level is often convenient to use to edit and compile CD music.But, this technology has its shortcoming, process circuit
It is mixed with the source of sound transmitted from L channel and R channel.The circular audio technology of standard can not show the sound transmitted from upper and lower side
Source, can not also rely on software random localization of sound source in virtual environment, or calculate and compare the sound relation of 3D game in real time.
Judged with strict impression, this technology can not be referred to as 3D audios, can only at most can be regarded as 2.5D, because it is only relatively improved
Listen to the limitation in the orientation of loudspeaker.In addition to eyes, ear is set also to differentiate the 3-dimensional positioning of object, and reduction sound
Sound propagation delay problem, makes positioning more precisely more fit actual.In daily life, audiovisual mutually makes up, and the technology makes
The sense of hearing makes up the defect of vision positioning object.And the 3D audios based on head phase produce algorithm and may apply to virtual reality
In, the direction of sound is gone out by the angular advance budget for person head position of predicting future games, sound biography is reduced with this
The latency issue broadcast and received, the sound for allowing user to listen to more has direction feeling, gives user more real game experiencing.
It is that can not stand calculating 3D sounds to prolong because head rotation is too fast and tradition HRTF algorithms are in this application scene
Late.Traditional 3D sound only solves 3D acoustic problems using only HRTF, but can not timely calculate 3D sound, delay compared with
Greatly.Then propose to reduce the delay that 3D sounds play by this algorithm that there is provided the 3D sound experience instant to user.
The content of the invention
The technical problem that algorithm is present is produced in order to solve the above-mentioned existing 3D audios based on head phase, the present invention provides one
Plant the 3D audios based on head phase and produce algorithm.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of 3D audios based on head phase produce algorithm, and its key step includes：
1) receive distal end voice data, i.e., the other users voice data listened to sent from streaming media server,
These data are through overcompression and add the RTP bag datas of some network states (such as present flow rate bps sizes)；
2) by the incoming Neteq modules of distal end voice data, by Neteq module solution RTP bag datas, processing network is trembled
It is dynamic, voice package losing is handled, the loss of the data caused by network jitter, smooth generation pcm voice data is compensated；
3) pcm voice data are received by 3D audio effect processing modules, generates 3D audios；
4) audio data transmitting of generation 3D audios is sent to hardware broadcasting.
Further, the step 3) in, the 3D audio effect processings module includes 3D audios pretreatment module and HRTF is calculated
In method module, the 3D audios pretreatment module, according to formula
θ=ω0t+βt2/ 2,
Wherein, θ is head rotation angle, ω0For the angular speed of head rotation, β is the angular acceleration of head rotation, and t is
It is the voice data length of reciever caching between the time for the sound heard, 10ms~60ms, is shaken according to current network
Situation, a specific t value (10ms~60ms) can be obtained by hardware, and more than 60ms can substantially feel there is sound delay time, used
Family experience is bad, so 10ms~60ms head rotation angle, θ is calculated, by the incoming HRTF algoritic modules of head rotation angle, θ
In, HRTF algoritic modules use existing algorithms library, generate 3D audios.
The beneficial effects of the invention are as follows：The present invention adds 3D sounds by carrying out in-depth improvement to HRTF algoritic modules function
Pretreatment module is imitated, during personage's head rotation, the propagation starting point of sound source is predicted according to the angular acceleration of head rotation, is counted in advance
3D sound in following 10ms~60ms time is calculated, largely reducing the delay of 3D sounds, there is provided instant to user
3D sound experiences.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is flowage structure schematic diagram of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in figure 1, a kind of 3D audios based on head phase of the present invention produce algorithm, its key step includes：
1) receive distal end voice data, i.e., the other users voice data listened to sent from streaming media server,
These data are through overcompression and add the RTP bag datas of some network states (such as present flow rate bps sizes)；
2) by the incoming Neteq modules of distal end voice data, by Neteq module solution RTP bag datas, processing network is trembled
It is dynamic, voice package losing is handled, the loss of the data caused by network jitter, smooth generation pcm voice data is compensated；
3) pcm voice data are received by 3D audio effect processing modules, generates 3D audios；
4) audio data transmitting of generation 3D audios is sent to hardware broadcasting.
Further, the step 3) in, the 3D audio effect processings module includes 3D audios pretreatment module and HRTF is calculated
In method module, the 3D audios pretreatment module, according to formula
θ=ω0t+βt2/ 2,
Wherein, θ is head rotation angle, ω0For the angular speed of head rotation, β is the angular acceleration of head rotation, and t is
It is the voice data length of reciever caching between the time for the sound heard, 10ms~60ms, is shaken according to current network
Situation, a specific t value (10ms~60ms) can be obtained by hardware, and more than 60ms can substantially feel there is sound delay time, used
Family experience is bad, so 10ms~60ms head rotation angle, θ is calculated, by the incoming HRTF algoritic modules of head rotation angle, θ
In, HRTF algoritic modules use existing algorithms library, generate 3D audios.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (2)
1. a kind of 3D audios based on head phase produce algorithm, its key step includes：
1) distal end voice data is received；
2) unpacked by Neteq modules, handle network jitter, handle voice package losing, smooth generation pcm voice data；
3) pcm voice data are received by 3D audio effect processing modules, generates 3D audios；
4) audio data transmitting of generation 3D audios is sent to hardware broadcasting.
2. a kind of 3D audios based on head phase according to claim 1 produce algorithm, it is characterised in that：The step 3)
In, the 3D audio effect processings module includes 3D audios pretreatment module and HRTF algoritic modules, the 3D audios pretreatment module
In, according to formula
θ=ω0t+βt2/ 2,
Calculate 10ms~60ms head rotation angle, θ, by the incoming HRTF algoritic modules of head rotation angle, θ, HRTF algorithms
Module uses existing algorithms library, generates 3D audios.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710147042.1A CN107071639A (en) | 2017-03-13 | 2017-03-13 | A kind of 3D audios based on head phase produce algorithm |
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| CN201710147042.1A CN107071639A (en) | 2017-03-13 | 2017-03-13 | A kind of 3D audios based on head phase produce algorithm |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101483797A (en) * | 2008-01-07 | 2009-07-15 | 昊迪移通(北京)技术有限公司 | Head-related transfer function generation method and apparatus for earphone acoustic system |
| CN104050288A (en) * | 2014-06-27 | 2014-09-17 | 上海二三四五网络科技股份有限公司 | Calling method and system based on web browser and soft switch server |
| CN105163242A (en) * | 2015-09-01 | 2015-12-16 | 深圳东方酷音信息技术有限公司 | Multi-angle 3D sound playback method and device |
| CN105872928A (en) * | 2016-04-26 | 2016-08-17 | 惠州Tcl移动通信有限公司 | Method and system for generating virtual surround sound based on mobile terminal |
-
2017
- 2017-03-13 CN CN201710147042.1A patent/CN107071639A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101483797A (en) * | 2008-01-07 | 2009-07-15 | 昊迪移通(北京)技术有限公司 | Head-related transfer function generation method and apparatus for earphone acoustic system |
| CN104050288A (en) * | 2014-06-27 | 2014-09-17 | 上海二三四五网络科技股份有限公司 | Calling method and system based on web browser and soft switch server |
| CN105163242A (en) * | 2015-09-01 | 2015-12-16 | 深圳东方酷音信息技术有限公司 | Multi-angle 3D sound playback method and device |
| CN105872928A (en) * | 2016-04-26 | 2016-08-17 | 惠州Tcl移动通信有限公司 | Method and system for generating virtual surround sound based on mobile terminal |
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Application publication date: 20170818 |