CN105704597A - Smart headphone provided with sound effect processing system - Google Patents
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Abstract
The invention discloses a smart headphone provided with a sound effect processing system. The smart headphone comprises at least two channel loudspeaker units and an intelligent control unit, wherein the intelligent control unit is composed of a data transmission module, a microprocessor, a memory, a digital-to-analog converter, an audio frequency amplifier and a power supply module, the data transmission module, the memory, the digital-to-analog converter and the power supply module are connected with the microprocessor, and the digital-to-analog converter is connected with the channel loudspeaker units through the audio frequency amplifier; and the microprocessor is provided with the sound effect processing system which consist of one or any combination of a sound effect balancer, a reverberator, a virtual low-frequency device and a sound field enhancer. The smart headphone is internally provided with the sound effect processing system (such as the sound effect balancer, the reverberator, the virtual low-frequency device and the sound field enhancer), can download preset sound effect processing configuration data from external equipment, and can dynamically switch sound effect processing algorithms according to played music, so that the user can get help from experts.
Description
Technical field
The present invention relates to a kind of intelligent earphone being provided with sound effect processing system, belong to ear phone technology field。
Background technology
At present, along with popularizing of the mobile equipment such as smart mobile phone and PAD, earphone has become as the standard configuration product of digital Age individual。Traditional earphone adopts simulated audio signal input, drives earphone speaker unit sounding。Along with developing rapidly of communication, derive the wireless headset of employing Radio Transmission Technology (such as bluetooth, wifi etc.)。Meanwhile, integrated MP3 broadcasting, FM radio, environment noise eliminate, and even support that the intelligent earphone of 3G/4G network savvy also rises gradually, and the function making earphone is more and more abundanter。
On the other hand, the audio experience improving earphone is always up a more complicated problem:
1. commonly used simulation input mode, makes the input signal quality of earphone can not be guaranteed。The signal quality of simulation input mode depends on the outut device of sound, and the electroacoustic property of the mobile equipment of great majority is unsatisfactory at present, causes that the sound signal quality that most of equipment exports is not high；Secondly, analogue signal quality is also affected by the interference of circuit noise, also serious have impact on the audio signal quality being input to earphone。
2., due to the miniaturization of earphone speaker so that frequency response curve and the desirable straight frequency response curve of earphone are widely different, cause that the audio experience of most earphone products is not good。More seriously, due to the acoustic design existing defects of some earphone so that the frequency response of earphone system is excessively zoomed in or out in some frequency range, cause for listening the naturalness of music, equilibrium sense and definition to be affected。
3. different genres of music needs different system performances。Such as the music type such as pop music, classical music, rock music is experienced has different requirements to Play System, and current headset solution is not solved by this problem。
4. the audition tendentiousness of different types of user is different。Most users do not meet the professional ability of oneself audition hobby, it is necessary to the help of professional, current headset solution is not solved by this problem。
In sum, solve, but without an effective solution, the as above problem that earphone system exists
Summary of the invention
Goal of the invention: present invention aims to the deficiencies in the prior art, it is provided that a kind of intelligent earphone, becomes one functions such as data transmission, audio effect processing, system equalization, music management and broadcastings。
Technical scheme: a kind of intelligent earphone being provided with sound effect processing system of the present invention, including at least two channel loudspeaker unit and intelligent control unit, described intelligent control unit is made up of data transmission module, microprocessor, memorizer, digital to analog converter, audio frequency amplifier and power module, described data transmission module, memorizer, digital to analog converter and power module are all connected with microprocessor, and described digital to analog converter is connected with loudspeaker unit by audio frequency amplifier；
Described microprocessor is provided with sound effect processing system, and described sound effect processing system is made up of the one in audio equalizer, reverberator, virtual low frequency device and sound field booster or combination in any；
Described audio equalizer, for strengthening or weaken the sound of special frequency channel, to obtain better audio experience。
Described reverberator, for simulating the architectural acoustics environment of specific audition。
Described virtual low frequency device, for when acoustical signal exists harmonic structure, auditory system can feel the harmonic component of the lower frequency not actually existed。
Described sound field booster, to improve space sense when acoustical signal is play。
Improve technique scheme further, described microprocessor is additionally provided with system equalizer, for improving the frequency response of earphone。
As further improvement: this earphone can pass through data transmission module and download the audio effect processing configuration data preset。
Further, described audio effect processing configuration data is the one in audio equalizer configuration parameter, reverberator configuration parameter, virtual low frequency device switch and sound field booster switch or combination in any。
Described audio effect processing configuration data can carry out switching at runtime according to the music type play。Described music type can be classified according to music category, singing style or bent wind, and corresponding musical pattern data can download to earphone end by data transmission module from external equipment。
The system equalization parameter of the described system equalizer of above-mentioned intelligent earphone can be obtained by following method, comprises the steps of: (1) measures the ears position frequency response curve of earphone；(2) according to surveyed frequency response curve, parametric equalizer is regulated so that the frequency response curve after adjustment is better than surveyed frequency response curve；(3) balance parameters of the left and right ear of gained after adjustment is stored in memorizer。
Further, described step (1) can adopt frequency sweep, interval sampling method to measure。
Compared with prior art, it provides the benefit that the present invention:
(1) sound effect processing system (such as audio equalizer, reverberator, virtual low frequency device and sound field booster) is set in earphone, and default audio effect processing configuration data can be downloaded from external equipment, and according to play music switching at runtime audio effect processing algorithm, make user can obtain the help of expert。
(2) set system equalizer in earphone, it is possible to be effectively improved the acoustical flaw of earphone system, make earphone frequency response curve more excellent；
(3) acoustical signal can pass through to be digitally transmitted earphone, thus avoiding the interference of mimic bus；
(4) the high-quality decoding of earphone end and amplifying, it is to avoid the good sound quality caused of outfan electroacoustic property declines；
Accompanying drawing explanation
Fig. 1 is the schematic diagram of existing earphone。
Fig. 2 is the structural representation of the present invention。
Fig. 3 is the structural schematic block diagram of intelligent control unit of the present invention。
In figure: 31, auricular concha；32, ear pad；33, Tou Liang；34, loudspeaker unit；35, switch is controlled；51, intelligent control unit。
Detailed description of the invention
Below in conjunction with accompanying drawing, technical solution of the present invention is described in detail, but protection scope of the present invention is not limited to described embodiment。
Embodiment 1: a kind of intelligent earphone being provided with sound effect processing system, switchs including at least two channel loudspeaker unit, auricular concha, Tou Liang, ear pad and control。
Described loudspeaker unit is the sound-generating element of earphone, can adopt moving-coil, the dynamic loadspeaker structure such as ferrum, plane diaphragm。At least one loudspeaker unit in each auricular concha。Further, for improving audio experience, each auricular concha can include multiple loudspeaker unit, for instance work in the loudspeaker unit of different frequency scope, and work in the loudspeaker unit of different acoustic fields position。When adopting the loudspeaker unit working in different frequency scope, it is necessary to install and connect a corresponding frequency divider。When adopting the loudspeaker unit working in different acoustic fields position, it is necessary to increase digital to analog converter and the amplifier of respective channel。
Auricular concha is the pith of earphone, and it is equivalent to the casing of audio amplifier, and at least one loudspeaker unit (driver) is installed in the inside, for sounding。Acoustic design according to auricular concha, is divided into closed and open two big classes, can adopt plastic material, wooden or aluminum matter structure。
Head beam, the i.e. U-shaped support of earphone, for being fixed on the ears position of hearer by two auricular conchas。The design of head beam largely have impact on the comfort level of earphone, is generally adopted scalable design, to be suitable for different head dummys；And the part that head beam and auricular concha connect, can do certain angular adjustment。The basic structure of neck-band type earphone is identical with this, accordingly it is also possible to regard the one of a beam as。
Ear pad energy buffer head band pressure, is also the part directly attaching skin, also directly affects the comfort level that earphone is worn, and its main material is sponge or silica gel, and Facing material can use artificial leather, skin, flannelette, screen cloth etc.。
Control switch and realize the inputting interface that ear-phone function controls, it may include electric power on/off, broadcasting/time-out, previous head, a rear head etc. control。
Above-mentioned earphone is also integrated with intelligent control unit, described intelligent control unit is made up of data transmission module, microprocessor, memorizer, digital to analog converter, audio frequency amplifier and power module, described data transmission module, memorizer, digital to analog converter and power module are all connected with microprocessor, and described digital to analog converter is connected with loudspeaker unit by audio frequency amplifier。
Described microprocessor is provided with system equalizer, audio equalizer, reverberator, virtual low frequency device and sound field booster。
Described system equalizer, for improving the frequency response of earphone。
Described audio equalizer, for strengthening or weaken the sound of special frequency channel, to obtain better audio experience。
Described reverberator, for simulating the architectural acoustics environment of specific audition。
Described virtual low frequency device, for when acoustical signal exists harmonic structure, auditory system can feel the harmonic component of the lower frequency not actually existed。
Described sound field booster, to improve space sense when acoustical signal is play。
This earphone can pass through the audio effect processing configuration data that data transmission module download is preset simultaneously。Described audio effect processing configuration data is the one in audio equalizer configuration parameter, reverberator configuration parameter, virtual low frequency device switch and sound field booster switch or combination in any。Described audio effect processing configuration data can carry out switching at runtime according to the music type play。Music type can be classified according to music category, singing style or bent wind, and corresponding musical pattern data can download to earphone end by data transmission module from external equipment。
The system equalization parameter obtaining method of the system equalizer of above-mentioned intelligent earphone, comprises the steps of: (1) measures the ears position frequency response curve of earphone；(2) according to surveyed frequency response curve, system equalizer parameter is regulated so that the frequency response curve after adjustment is better than surveyed frequency response curve；(3) balance parameters of the left and right ear of gained after adjustment is stored in memorizer。Wherein, step (1) can adopt frequency sweep, interval sampling method to measure。
Below the function of each parts of intelligent control unit is elaborated:
Described data transmission module is connected with external equipment, and the control signal, audio effect processing configuration data, musical pattern data and the data transmission in network telephony that are used for sending over external equipment are to earphone end；Music data (including compression or unpressed voice data and other relevant information) is transferred to earphone end in modes such as downloading, synchronize, share。
Described microprocessor switchs, for the defeated module of performing data and control, the control signal transmitted and the voice data that the voice data of memorizer storage, data transmission module are transmitted carries out system equalization, audio effect processing；
Program that described memorizer runs for storing intelligent control unit and audio effect processing configuration data, musical pattern data and voice data that associated parameter data and data transmission module transmit；
Described digital to analog converter is converted to analoging sound signal for the voice data transmitted by microprocessor；
Described audio frequency amplifier is for amplifying the analoging sound signal after digital to analog converter is changed, to drive loudspeaker unit sounding。
Described external equipment includes desk computer, notebook computer, smart mobile phone, PAD, DVD, MP3 player or the webserver etc.。
Described data transmission module is connected with external equipment by wired mode or wireless mode, and as preferably, described wired mode can adopt the communication protocols such as USB, AES, SPDIF, described wireless mode can adopt the communication protocols such as bluetooth, wifi, infrared, 3G/4G。
Described microprocessor can be the combination of microcontroller (MCU) or digital signal processor (DSP) or microcontroller (MCU) and digital signal processor (DSP), and is additionally provided with music format decompressor on described microprocessor。
Specifically, earphone is implemented function such as by data transmission module by described external equipment as master controller:
1. the download of music data；2. parameter arrange: audio effect processing (audio equalizer, reverberator, virtual low frequency device harmony field processor), mode of operation (music list, playing sequence, audio effect processing pattern static state/switching at runtime)；3. preset the download of audio effect processing configuration data and the musical pattern data for switching at runtime audio effect processing。
Described parameter is arranged, and refers to, by parameter or diagramatic way, arrange the parameter of audio equalizer, reverberator etc., to realize the audio effect processing effect of correspondence。
Described mode of operation is arranged, and refers to that the editor (such as newly-built list, increasing song, deletion song etc.) of music playlist, playing sequence arrange static state/switching at runtime (static state: all music types adopt systemic presupposition pattern of (such as played in order, shuffle, loop play etc.), audio effect processing pattern；Dynamic: the type according to play song, the preset mode that real-time selection is different)。
The download of described default audio effect processing configuration data, and the musical pattern data for switching at runtime audio effect processing, refer to from controller, described audio effect processing configuration data and musical pattern data are downloaded to earphone end。
Function above all can adopt known technology to be realized by software mode。
Meanwhile, this intelligent earphone can work with possessing the equipment collaborations such as the PC of data-transformation facility, smart mobile phone, PAD。Now, PC, mobile phone, PAD are upper runs corresponding music software, functionally becomes the main process equipment of described intelligent earphone。The music software of described main process equipment is music main player, and realizes the basic function logic of music, such as synchronous lyrics, audio-visual synchronization, broadcasting management etc.。The software development possessing these functions belongs to known technology, does not repeat them here。
When with main machine coordination working, intelligent earphone and main frame collectively form a music playing system, and intelligent earphone provides system equalization, audio effect processing, music the utility services such as to listen to for system。
Now, main frame is that intelligent earphone provides at following ability: 1. music data transmissions；2. parameter is arranged；3. synchronizing capacity: the lyrics are Tong Bu with song, audio-visual synchronization。
With as in the collaborative work of main process equipment, it is ensured that earphone play music and the lyrics that software is play, video synchronization it is critical that, this index definition is synchronizing relay。General, synchronizing relay should control within the scope of-10ms～30ms, namely play music not should in advance with the lyrics and video 10 milliseconds, should not lag behind the lyrics and video 30 milliseconds yet。
With as in the collaborative work of main process equipment, it is possible to by audio effect processing, download the audio effect processing configuration data preset and the part or all of function of switching at runtime audio effect processing is built in the music software of main process equipment。Now main process equipment output is the music data through audio effect processing。
Microprocessor is as the core component of intelligent control unit, and it passes through software algorithm, it is achieved the control of the subsystems such as data transmission, system equalization, audio effect processing, music management and broadcasting and systemic-function。
System equalization therein and audio effect processing function are by arranging system equalizer on the microprocessor, audio equalizer, reverberator, virtual low frequency device and what sound field booster realized。
1, the realization of system equalization method。
Under normal circumstances, human ear can hear the acoustical signal of 20Hz to 20000Hz frequency range。Further, in real acoustic surrounding, sound enters our auditory system with the form of direct sound wave, reflection and late reflections, makes people obtain audio experience。When headphones playback, desirable target is to make the undistorted reproduction of acoustical signal (i.e. auditory system) in our ear of 20Hz to 20000Hz frequency range, now, the frequency response of sound playback system be substantially one in 20Hz to 20000Hz frequency range gain range be the straight line of 0dB。But, due to the restriction of earphone size, and the limitation of earphone system space structure, material and technology etc., the earphone system of reality does not reach all far away this target。Therefore, under existing technical conditions, make earphone as close possible to ideal system frequency response, be the cardinal principle of headset designs。
But, conventional earphone design is confined to the design of loudspeaker unit, physical arrangement and electroacoustic part more。Described intelligent earphone, on the basis of conventional earphone, adds system equalizer, is improved the frequency response of earphone system further by system equalization。
The system equalization function of earphone is realized by software mode in described intelligent control unit。
Concrete, before earphone dispatches from the factory, obtain system equalization parameter as follows:
(1) the ears position frequency response curve of earphone is measured, it is possible to adopt the method such as frequency sweep, interval sampling to measure。
(2) according to surveyed frequency response curve, the parameter of system equalizer is regulated so that the frequency response curve after adjustment is better than surveyed frequency response curve；This process is capable of circulation to be carried out, until the frequency response after adjusting tends to optimum。
(3) being stored in earpiece memory by the system equalization parameter of left and right ear, for later system equalization, wherein the system equalization parameter of left and right ear is likely to differ。
In earphone uses, realize system equalization as follows:
(1) from memorizer, read the system equalization parameter of ears。
(2) when playing, use system equalizer to process the voice data play, namely voice data is done equilibrium treatment。
Described system equalizer can be multiband Graphic equalizer, it is possible to use parametric equalizer。According to surveyed frequency response curve, when regulating system equalizer parameter, it is possible to adopt frequency response measurement method, subjective testing method or both mixed methods。
2, the realization of sound effect treatment method。
Sound effect treatment method includes the usual acoustic signal processing methods such as audio equalizer, reverberator, virtual low frequency device and sound field booster。
Described reverberator is for simulating the architectural acoustics environment of specific audition, to make up the deficiency of earphone audition。Reverberator belongs to known technology, it is possible to adopt Schroeder model, Mooer model and various known method。
Described virtual low frequency device utilizes the psychoacoustics feature of people, and namely when acoustical signal exists harmonic structure, auditory system can feel (illusion) harmonic component to the lower frequency not actually existed。Owing to earphone speaker unit size is little, being unfavorable for the acoustical signal reduction of lower frequency, virtual low frequency device is particularly well-suited to earphone system。The method that realizes of virtual low frequency falls within known technology category, does not repeat them here。
Described sound field booster adopts stereo enhancement technology to improve space sense when acoustical signal is play, and therefore has similar application background with reverberator。There is a lot of stereo enhancement technology at present, as utilized HRTF (head-position difficult labor) to solve the stereo Enhancement Method of effect in head (namely acoustic image is in head), utilize principal component analytical method to adjust the stereo Enhancement Method of irrelevance between sound channel, the stereo Enhancement Method utilizing wave field synthetic technology driving loudspeaker unit etc.。
Above audio effect processing algorithm can be used alone, it is also possible to is used in combination with。
In typical application scenario, for obtaining desirable audio effect processing effect, audio equalizer and reverberator are often in conjunction with use。It is emphasized that the effect of audio equalizer here be different from system equalization use system equalizer；The former purpose is to strengthen or weaken the sound of special frequency channel, to obtain better audio experience；The purpose of the latter is to compensate the Frequency Response that earphone improves, and is closer to desirable frequency response curve。Now, preferably realize as one, it is possible to use following method:
(1) when voice data is processed, first use audio equalizer, re-use reverberator；
(2) when audio effect processing needs to use audio equalizer, can by audio equalizer and system equalizer merging treatment, namely select identical equaliser structure (parametric equalizer such as the Graphic equalizer of similar frequency bands or identical parameters), and the adjustment parameter of system equalizer and audio equalizer is merged determine final equalizer configuration。
The processing mode of described first balanced reverberation again makes the sound after process more natural。Described namely the equalizer merging treatment of audio effect processing equalizer and system equalization can be saved amount of calculation, be also convenient for working state of system monitoring, make the overall gain of equilibrium treatment be in rational numerical range。
Further, intelligent earphone of the present invention can also download default audio effect processing configuration data and switching at runtime sound effect treatment method
Obtain desirable audio effect processing effect, it usually needs the tuning knowledge of specialty and abundant practical experience。Described intelligent earphone user can pass through data transmission module and download the audio effect processing configuration data preset, to obtain the help of expert。
Can select according to the music type switching at runtime audio effect processing configuration play, to obtain more excellent audio experience。
Described audio effect processing configuration data, it is possible to be one or the combination of following parameter: (1) audio equalizer configuration parameter；(2) reverberator configuration parameter；(3) virtual low frequency device switch；(4) sound field booster switch。
Described audio effect processing configuration data can include the parameter of other usual acoustic signal processing methods。
The method of described switching at runtime audio effect processing configuration, it is possible to the music type according to playing song switches in real time。These music types can be music category, singing style or Qu Feng etc.。
As the specific embodiment downloading audio effect processing configuration data and the switching at runtime sound effect treatment method preset, it is possible to music to be divided into following category: the type such as classic (Classsic), rural area (Country), jazz (Jazz), rock and roll (Rock), heavy metal (Heavymetal), punk (Punk), electronics (Techml), R&B。For every kind of music type, different audio effect processing configuration parameters can be set。Such as, equalizer and reverberator parameter can be set for classical music；And for rock and roll and heavy metal music, except equalizer and reverberator are set, also to open virtual low frequency device and sound field booster。Corresponding, during earphone down-load music data, down-load music type information and default audio effect processing configuration data simultaneously。When earphone music, when playing the music of a certain type, configure audio effect processing parameter in real time according to the music type play, make user obtain better audio experience。Because of the difference of the audition orientation of different experts, every kind of music type can have the default audio configuration data of more than one expert, and provides user to download。Further, on the basis that big category divides, it is possible to the finer division of music, and provide corresponding default audio configuration data；As an extreme example, it is allowed to the default audio configuration data that every a piece of music is differently configured。
As a supplement: described memorizer is made up of internal storage and external memory storage, described external memory storage and control switch are connected with microprocessor by I/O port。Described power supply module, the electricity storage worked for drive system and the management of power-supply system, provide the energy of continual and steady work for system。
For ease of operation, earphone end can increase liquid crystal driver and connect a liquid crystal display。Further, the described part or all of function controlling switch。The liquid crystal display that can also adopt touch function realizes。
The present invention, on traditional earphone system basis, is integrated with an intelligent control unit, and the collaboration working method of two systems is:
Intelligent control unit is the control core of described earphone, accepts external control, it is achieved system control logic, data process, transmit and storage, and drive earphone speaker unit sounding。Conventional earphone system is the Basic of Acoustics of described earphone, it is achieved the signal of telecommunication that intelligent control unit exports is converted to audible sound。
During work, intelligent control unit obtains music data by network or memorizer。Described music data can be compressed format (such as MP3, AAC, APE etc.) or uncompressed form (i.e. PCM, WAV)。
Operate in the music software on intelligent control unit and accept external control (as by system I/O), it is achieved music playback function。
Described music playback function farther includes the common playing functions such as broadcasting, time-out, stopping, previous head, a rear head, loop play, shuffle。Music playback function is the well-known process that regular software music player adopts, and repeats no more here。
Microprocessor comprise association process DSP, DSP can work in coordination with MCU complete music decompress, the work of audio effect processing contour amount of calculation。Wherein, music file decompresses the compression protocol that can adopt standard；Audio effect processing includes but not limited to equilibrium, reverberation process, virtual low frequency, stereo enhancing, it is possible to adopt known sound signal processing algorithm。
Intelligent control unit output analoging sound signal, drives earphone speaker unit (driver) to realize music。
Although as it has been described above, represented and described the present invention with reference to specific preferred embodiment, but it shall not be construed as the restriction to the present invention self。Under the spirit and scope of the present invention premise defined without departing from claims, it can be made in the form and details various change。
Claims (5)
1. the intelligent earphone being provided with sound effect processing system, including at least two channel loudspeaker unit and intelligent control unit, described intelligent control unit is made up of data transmission module, microprocessor, memorizer, digital to analog converter, audio frequency amplifier and power module, described data transmission module, memorizer, digital to analog converter and power module are all connected with microprocessor, and described digital to analog converter is connected with loudspeaker unit by audio frequency amplifier；It is characterized in that:
Described microprocessor is provided with sound effect processing system, and described sound effect processing system is made up of the one in audio equalizer, reverberator, virtual low frequency device and sound field booster or combination in any；
Described audio equalizer, for strengthening or weaken the sound of special frequency channel, to obtain better audio experience。
2. a kind of intelligent earphone being provided with sound effect processing system according to claim 1, it is characterised in that: described microprocessor is additionally provided with system equalizer, for improving the frequency response of earphone。
3. a kind of intelligent earphone being provided with sound effect processing system according to claim 1, it is characterised in that: this earphone can pass through data transmission module and download the audio effect processing configuration data preset。
4. a kind of intelligent earphone being provided with sound effect processing system according to claim 3, it is characterised in that: described audio effect processing configuration data is the one in audio equalizer configuration parameter, reverberator configuration parameter, virtual low frequency device switch and sound field booster switch or combination in any。
5. a kind of intelligent earphone being provided with sound effect processing system according to claim 4, it is characterised in that: described audio effect processing configuration data can carry out switching at runtime according to the music type play。
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Application publication date: 20160622 |