CN204836548U - Numeral sound card and system thereof - Google Patents
Numeral sound card and system thereof Download PDFInfo
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- CN204836548U CN204836548U CN201520616372.7U CN201520616372U CN204836548U CN 204836548 U CN204836548 U CN 204836548U CN 201520616372 U CN201520616372 U CN 201520616372U CN 204836548 U CN204836548 U CN 204836548U
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Abstract
The utility model discloses a numeral sound card and system thereof, this numeral sound card includes: the sound card main part, and sound card main part electric connection's input interface and output interface, wherein, the input interface is used for receiving a data signal and imports extremely the sound card main part, through the sound card main part is right a data signal handles and forms the 2nd data signal and transmit extremely the output interface, for output interface outlet to external equipment. Numeral sound card system includes: the digit microphone reaches as above digital sound card, numeral microphone and digital sound card electric connection. The utility model discloses a limited limited problem of applied scene that has resulted in digital microphone of integrated audio interface quantity on the digital microphone that numeral sound card and system thereof can avoid having now.
Description
Technical field
The utility model relates to Audio Signal Processing technical field, particularly relates to a kind of digital audio care and system thereof.
Background technology
At present, the microphone generally used adopts analog signal to carry out the transmission of sound mostly.In the transmitting procedure of analog signal, the impact of electromagnetic interference in environment can be subject to unavoidably, and the antijamming capability of the transfer voice adopting analog signal to carry out is poor, be difficult to again when reception eliminate already present interference ideally, the final signal formed is caused often to there is a large amount of noises, and cause distorted signals, finally cause the acoustical quality of microphone poor.
Based on this, can the digital microphone of output digit signals owing to having the advantages such as acoustical quality is good, antijamming capability is strong, progressed into the sight line of people.But due to the finite volume of digital microphone itself, making in existing digital microphone cannot the audio interface of integrated a greater number, the one of commonly available audio interface mostly just in AES audio interface, coaxial audio interface, optical fiber audio interface, 3.5mm audio interface or two kinds, the application scenarios which results in digital microphone is very limited.
In addition, audio interface integrated in existing digital microphone cannot carry out transfer of data with the audio interface of the terminals such as computer, mobile phone, panel computer, will cause digital microphone cannot with terminal with the use of.
Utility model content
The utility model is to provide a kind of digital audio care and system thereof, result in the limited problem of the application scenarios of digital microphone for solving audio interface limited amount integrated in digital microphone of the prior art.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is:
A kind of digital audio care, comprise: sound card main body and the input interface be electrically connected with described sound card main body and output interface, wherein, described input interface is for receiving the first digital signal and inputing to described sound card main body, by described sound card main body the second digital signal formed to described first Digital Signal Processing and transfer to described output interface, exporting external equipment to for described output interface.
Further, described sound card main body comprises: volume adjusting key and the sound volume regulation unit be connected with the described volume adjusting key signal of telecommunication, wherein, produces the control signal corresponding to this default triggering mode when described volume adjusting key is triggered according to default triggering mode; Described sound volume regulation unit obtains described control signal, and according to the described control signal process received the first digital signal.
Further, described sound volume regulation unit comprises: control module, obtains described control signal, and produces gain control signal according to the described control signal received; Protocol conversion module, for carrying out protocol conversion to described first digital signal, to form the three digital signal be consistent with the interface protocol of described output interface adaptation; Wherein, described first digital signal meets the interface protocol with described input interface adaptation; D/A converter module, for being converted to the first analog signal by described three digital signal; Gain process module, for carrying out gain process according to described gain control signal to described first analog signal, to form the second analog signal; And analog-to-digital conversion module, for described second analog signal is converted to described second digital signal, and transfer to described output interface.
Further, described sound card main body comprises: usb audio controller, it is integrated with USB input channel and USB output channel, to be received first digital signal be consistent with USB interface agreement of described input interface input by described USB input channel, and be converted to described second digital signal be consistent with the interface protocol of described output interface adaptation, or, the second digital data transmission extremely described output interface will be consistent with USB interface agreement by described USB output channel.
Further, described sound card main body comprises: digital isolated location, is connected between described input interface and output interface, isolates for signal.
Further, the type of described input, output interface comprise in AES audio interface, coaxial audio interface, optical fiber audio interface, 6.5mm audio interface, 3.5mm audio interface, USB interface any one or multiple.
Further, described 3.5mm audio interface is four-part form audio interface, and it comprises four signal transmission passages, adopts wherein two signal transmission passages to be respectively used to transmission first, second digital signal described.
Further, described sound card main body also comprises: be arranged at the audio effect processing unit between described input interface and described output interface, for forming the second digital signal after carrying out audio effect processing to described first numeral and exporting described output interface to.
A kind of digital audio care system, comprising: digital microphone and digital audio care as above, described digital microphone and digital audio care are electrically connected.
Further, described digital microphone comprises: the pickup unit be electrically connected successively, AD conversion unit, conversion unit of protocol and digital audio interface, and described digital audio interface and described digital audio care are electrically connected.
Further, described digital audio interface comprise in AES audio interface, coaxial audio interface, optical fiber audio interface, 6.5mm audio interface, 3.5mm audio interface, USB interface any one or multiple.
Compared with prior art, the utility model has following beneficial effect:
By multiple input interface integrated in sound card main body and multiple output interface, and receive the first digital signal by input interface and input to sound card main body, by sound card main body the second digital signal formed to the first Digital Signal Processing and transfer to output interface, external equipment is exported to for output interface, digital audio care is made to be equivalent to an interface HUB, the digital data transmission between multiple different input interface and output interface can be met simultaneously, even audio interface limited amount integrated in existing digital microphone, also can make up by using the multiple input interface in digital audio care and multiple output interface, digital microphone can be connected with multiple, different peripheral, thus expand the application scenarios of digital microphone.
Accompanying drawing explanation
Fig. 1 is the structure chart of the digital audio care of an embodiment.
Fig. 2 is the structured flowchart of the sound card main body of the digital audio care of an embodiment.
Fig. 3 is the structured flowchart of sound volume regulation unit in Fig. 2.
Fig. 4 is the structured flowchart of the digital audio care of another embodiment.
Fig. 5 is the structured flowchart of the digital audio care of another embodiment.
Fig. 6 is the structured flowchart of the digital audio care of a specific embodiment.
Fig. 7 is the structured flowchart of the digital audio care system of an embodiment.
Fig. 8 is the structured flowchart of digital microphone in Fig. 7.
Embodiment
Below with reference to accompanying drawing, elaboration is further given to each embodiment of the present utility model.
As previously mentioned, along with the increase day by day of the application scenarios of digital microphone, the requirement of people to digital microphone is also more and more higher, in order to in existing digital microphone cannot integrated a greater number audio interface and the limited defect of its application scenarios is improved, spy proposes a kind of digital audio care and system thereof, better to put goods on the market in application.
Refer to Fig. 1, in one embodiment, a kind of digital audio care 100 comprises: sound card main body 120 and the input interface 110 be electrically connected with sound card main body 120 and output interface 130.
Wherein, input interface 110, for receiving the first digital signal and inputing to sound card main body 120, forms the second digital signal by sound card main body 120 to the first Digital Signal Processing and transfers to output interface 130, exporting external equipment to for output interface 130.
The type of interface comprises analog audio interface, digital audio interface, transfer bus interface etc., and such as, AES audio interface is digital audio interface, and USB interface is then transfer bus interface.Correspondingly, in sound card main body 120 want integrated input interface 110, the type of output interface 130 is also diversified, this depends on the type of the connecting interface between digital microphone and external equipment.
Further, the type of input interface 110, output interface 130 comprise in AES audio interface, coaxial audio interface, optical fiber audio interface, 6.5mm audio interface, 3.5mm audio interface, USB interface any one or multiple.
By multiple input interface 110 integrated in sound card main body 120 and multiple output interface 130, and receive the first digital signal by input interface 110 and input to sound card main body 120, by sound card main body 120 second digital signal formed to the first Digital Signal Processing and transfer to output interface 130, external equipment is exported to for output interface 130, digital audio care is made to be equivalent to an interface HUB, the digital data transmission between multiple different input interface 110 and output interface 130 can be met simultaneously, even audio interface limited amount integrated in existing digital microphone, also can make up by using the multiple input interfaces 110 in digital audio care 100 and multiple output interface 130, digital microphone can be connected with multiple, different peripheral, thus expand the application scenarios of digital microphone, avoid the problem that audio interface limited amount integrated in existing digital microphone causes the application scenarios of digital microphone limited.
Audio interface in existing terminal is used for the transmission carrying out analog signal, therefore cannot be connected with the audio interface in terminal by the 6.5mm audio interface for transmission of digital signals in the application's sound card main body 120,3.5mm audio interface, to carry out transfer of data, therefore, by USB interface being integrated in sound card main body 120, the USB interface in sound card main body 120 can be utilized digital microphone and terminal to be interconnected, thus to expand the application scenarios of digital microphone further.
Refer to Fig. 2, in one embodiment, sound card main body 120 comprises: volume adjusting key 123 and the sound volume regulation unit 122 be connected with volume adjusting key 123 signal of telecommunication.
Wherein, the control signal corresponding to this default triggering mode is produced when volume adjusting key 123 is triggered according to default triggering mode.
Sound volume regulation unit 122, obtains above-mentioned control signal, according to control signal process first digital signal received.
That is, volume adjusting key 123 is arranged in sound card main body 120, such as, in the case surface of digital audio care, user is by rotating or pressing volume adjusting key 123, make the sound volume regulation unit 122 be electrically connected with this volume adjusting key 123 receive a control signal, and then this sound volume regulation unit 122 is processed the first digital signal according to this control signal.
Refer to Fig. 3, in one embodiment, sound volume regulation unit 122 comprises: control module 1221, protocol conversion module 1222, D/A converter module 1223, gain process module 1224 and analog-to-digital conversion module 1225.
Wherein, control module 1221 for obtaining described control signal, and produces gain control signal according to the control signal received.
Control module 1221 can be single-chip microcomputer, microcontrol processor or fpga chip.
Protocol conversion module 1222 for carrying out protocol conversion to the first digital signal, to form the three digital signal be consistent with the interface protocol of output interface adaptation.Wherein, the first digital signal meets the interface protocol with input interface adaptation.
Interface protocol can be digital audio protocol, bus transfer agreement etc., and such as, SPDIF agreement is digital audio protocol, and USB interface agreement is then bus transfer agreement.Correspondingly, first, protocol conversion mode between three digital signal is also diversified, this depends on first, which kind of interface protocol three digital signal meets respectively.
In the present embodiment, the first digital signal is the digital signal meeting SPDIF agreement, and three digital signal meets I2S(Inter-ICSound) digital signal of agreement.Correspondingly, what protocol conversion module 1222 realized is then protocol conversion function between SPDIF agreement and I2S agreement.
D/A converter module 1223 is for being converted to the first analog signal by three digital signal.
D/A converter module 1223 can be digital to analog converter (D/A converter), also can be analog-digital chip (DAC chip).In the present embodiment, the three digital signal meeting I2S agreement is converted to the first analog signal by D/A converter module 1223.
Gain process module 1224 for carrying out gain process according to gain control signal to the first analog signal, to form the second analog signal.
By the gain process of carrying out the first analog signal according to gain control signal, make the amplitude of the second analog signal to be different from the amplitude of the first analog signal, and then achieve the adjustment of the volume being exported to the digital audio and video signals of external equipment by output interface.
Analog-to-digital conversion module 1225 for the second analog signal is converted to the second digital signal, and transfers to output interface.
Analog-to-digital conversion module 1225 can be analog to digital converter (A/D converter), also can be modulus conversion chip (ADC chip).In the present embodiment, the second analog signal is converted to the second digital signal meeting I2S agreement by analog-to-digital conversion module 1225 again, and transfers to output interface.
Certainly, in other embodiments, the job order of each module of sound volume regulation unit 122 also can be contrary with the job order in above-described embodiment, and this depends on which kind of the interface protocol that received by input interface, the first digital signal meets is.That is, if the interface protocol that the first digital signal meets is SPDIF agreement, then first this first digital signal can input in the protocol conversion module 1222 of sound volume regulation unit 122 and carry out protocol conversion, and now the job order of each module of sound volume regulation unit 122 is positive sequence.If the interface protocol that the first digital signal meets is I2S agreement, then now the job order of each module of sound volume regulation unit 122 is backwards, namely only has the first digital signal after all the other resume module of sound volume regulation unit 122 just can be input in protocol conversion module 1222 and carries out protocol conversion.
Refer to Fig. 4, sound card main body 120 comprises: usb audio controller 124.
Wherein, usb audio controller 124 is integrated with USB input channel and USB output channel, to be received the first digital signal be consistent with USB interface agreement that input interface 110 inputs by USB input channel, and be converted to the second digital signal be consistent with the interface protocol of output interface 130 adaptation, or, by USB output channel by the second digital data transmission of being consistent with USB interface agreement to output interface 130.
Such as, input interface 110 is USB interface, and output interface 130 is any one in optical fiber audio interface, coaxial audio interface or AES interface.Correspondingly, the interface protocol suitable with USB interface is USB interface agreement, and the interface protocol suitable with above-mentioned output interface 130 is SPDIF agreement.Now, first digital signal be consistent with USB interface agreement of USB interface input is received by USB input channel, and by usb audio controller 124, this first digital signal is converted to the second digital signal be consistent with the SPDIF agreement of output interface 130, thus the second digital signal formed through sound card main body 120 process is made to export external equipment to from output interface 130.
Certainly, in other embodiments, output interface 130 can also be any one in 3.5mm audio interface, 6.5mm audio interface.Correspondingly, suitable with those output interfaces 130 interface protocol also can be SPDIF agreement.
By usb audio controller 124 make digital audio care can with external equipment, the terminal especially with USB interface connects, and then existing digital microphone can be connected with the USB interface of terminal by digital audio care, and be not limited only to the audio interface of terminal, thus expand the application scenarios of digital microphone.
Refer to Fig. 5, in one embodiment, sound card main body 120 comprises: digital isolated location 125.
Wherein, digital isolated location 125 is connected between input interface 110 and output interface 130, isolates for signal.By arranging digital isolated location 125, improve the electrical isolation performance between input interface 110, output interface 130, sound card main body 120, eliminate in signals transmission the various interference that can run into, ensure that the stability of signal, and then ensure that the acoustical quality of digital microphone.
Further, such as, input interface 110 is any one in 6.5mm audio interface or 3.5mm audio interface, and output interface 130 is any one in optical fiber audio interface, coaxial audio interface or AES interface.It should be noted that, 6.5mm audio interface or 3.5mm audio interface normally use in the present embodiment as analog audio interface, stating 3.5mm audio interface is four-part form audio interface, it comprises four signal transmission passages, adopts wherein two signal transmission passages to be respectively used to transmission first, second digital signal described.Particularly, four signal transmission passages are referred to as L channel, R channel, microphone channel and ground wire passage, make wherein two passages in L channel, R channel and microphone channel be respectively used to transmit first, second digital signal, thus make 3.5mm audio interface can carry out the transmission of digital signal as digital audio interface.Preferably, the input channel of 3.5mm audio interface using L channel as the first digital signal, the output channel using R channel as the second digital signal.6.5mm audio interface in like manner, does not repeat them here yet.
Now, first, second digital signal transmitted in the input interface 110 of digital audio care 100, output interface 130 all meets SPDIF agreement, after the signal isolation through digital isolated location 125, directly external equipment can be exported to from output interface 130, and then digital microphone can be interconnected with the optical fiber audio interface of external equipment, coaxial audio interface or AES interface by digital audio care, not only increase the tonequality of digital microphone, and expand the application scenarios of digital microphone.
It is worth mentioning that, in the present embodiment, volume adjusting can be carried out equally after signal isolation, just need to increase a protocol conversion module again in the downstream of the analog-to-digital conversion module of existing sound volume regulation unit, this protocol conversion module is used for the digital signal meeting I2S agreement to be converted to the digital signal meeting SPDIF agreement, can export external equipment to make this digital signal by the output interface 130 adapting to SPDIF agreement.
Certainly, in other embodiments, as long as input interface 110 interface protocol adaptive with output interface 130 is SPDIF agreement, all can realize the transmission directly being carried out digital signal between input interface 110 and output interface 130 by digital isolated location 125, be not limited in the type of interface involved in above-described embodiment.
In other embodiments, sound card main body also comprises: be arranged at the audio effect processing unit between input interface and output interface, and audio effect processing unit forms the second digital signal after being used for carrying out audio effect processing to the first numeral and exports output interface to.
As shown in Figure 6, Fig. 6 is the structured flowchart of the digital audio care of a specific embodiment.Now for the type of interface be 3.5mm audio interface, 6.5mm audio interface, the workflow of USB interface to digital audio care 200 be illustrated as follows.
Using 3.5mm audio interface 210 or 6.5mm audio interface 210 as input interface, the first digital signal meeting SPDIF agreement received by those input interfaces carries out signal isolation to the digital isolated location 220 of sound card main body, is converted to input in sound volume regulation unit after the three digital signal meeting I2S agreement carries out volume adjusting through conversion unit of protocol 252.
Wherein, sound volume regulation unit is controlled by volume adjusting key 240, volume adjusting key 240 produces control signal and is sent to control module 251 when being triggered according to default triggering mode, control module 251 produces gain control signal according to control signal, the second analog signal is obtained to carry out gain process to the first analog signal be converted to through D/A converter module 253, by analog-to-digital conversion module 255, second analog signal is converted to the second digital signal again, and transfer to usb audio controller 260, finally export external equipment to from the USB interface 270 as output interface.
In the present embodiment, USB interface 270 also can as input interface, 3.5mm audio interface 210 or 6.5mm audio interface 210 also can as output interfaces, just workflow is the inverse process of above-mentioned workflow, namely the first digital signal received USB interface 270 is first carried out after volume adjusting carries out protocol conversion again, formed through the second digital data transmission of signal transacting to output interface, export external equipment to for output interface, this is no longer going to repeat them.
Certainly, in other embodiments, input interface also can be any one in AES audio interface, coaxial audio interface, optical fiber audio interface, and workflow is described above, and this is no longer going to repeat them.
Refer to Fig. 7 to Fig. 8, in one embodiment, a kind of digital audio care system comprises: the digital audio care 100 in digital microphone 300 and above-described embodiment, wherein, digital audio care 100 and digital microphone 300 are electrically connected, and digital audio care 100 and external equipment 400 are electrically connected.
Further, as shown in Figure 8, digital microphone 300 comprises: the pickup unit 310 be electrically connected successively, AD conversion unit 320, conversion unit of protocol 330 and digital audio interface 340, and wherein, digital audio interface 340 and digital audio care 100 are electrically connected.
Particularly, digital audio care 100 is integrated with multiple input interface and multiple output interface such as AES input and output, coaxial input and output, optical fiber input and output, 6.35mm input and output, 3.5mm input and output, USB input and output.Be electrically connected with digital audio care 100 by the digital audio interface 340 of digital microphone 300, to send the first digital signal meeting SPDIF agreement to digital audio care 100, digital audio care 100 receives this first digital signal by above-mentioned input interface and inputs to sound card main body, by sound card main body, the first digital signal signal transacting formed to the second digital signal and transfers to output interface, exporting external equipment to for output interface.
Wherein, digital audio care 100 can be exported by AES, coaxially multiple different output interface such as output, optical fiber output, 6.35mm output, 3.5mm output be connected with other audio frequency apparatus 401, such as power amplifier, audio amplifier etc.Digital audio care 100 can also be connected with terminal 402 by output interfaces such as USB outputs, such as computer, mobile phone, panel computer etc.
Certainly, in the present embodiment, digital audio and video signals after audio effect processing also can be sent to digital audio care 100 by USB interface by terminal 402, this digital audio and video signals is inputed to sound card main body as the first digital signal reception by input interface by digital audio care 100, the second digital data transmission formed by signal transacting by sound card main body is again to output interface, digital microphone 300 is exported to for output interface, user can be monitored by the digital audio and video signals after digital microphone 300 pairs of audio effect processing, or, carry out listening while sing according to this digital audio and video signals received by digital microphone 300, thus expand the application scenarios of digital microphone further.
In previous embodiment, by utilizing multiple input interface integrated on digital audio care and multiple output interface, make digital audio care can be connected between multiple different interface, and the Signal transmissions completed between this multiple different interface, solve a limited number of problem of audio interface integrated in digital microphone, and then enrich the application scenarios of digital microphone.
Foregoing; be only preferred embodiment of the present utility model; not for limiting embodiment of the present utility model; those of ordinary skill in the art are according to central scope of the present utility model and spirit; can carry out corresponding flexible or amendment very easily, therefore protection range of the present utility model should be as the criterion with the protection range required by claims.
Claims (10)
1. a digital audio care, it is characterized in that, comprise: sound card main body and the input interface be electrically connected with described sound card main body and output interface, wherein, described input interface is for receiving the first digital signal and inputing to described sound card main body, by described sound card main body the second digital signal formed to described first Digital Signal Processing and transfer to described output interface, exporting external equipment to for described output interface.
2. digital audio care as claimed in claim 1, it is characterized in that, described sound card main body comprises: volume adjusting key and the sound volume regulation unit be connected with the described volume adjusting key signal of telecommunication, wherein,
Described volume adjusting key produces the control signal corresponding to this default triggering mode when being triggered according to default triggering mode;
Described sound volume regulation unit obtains described control signal, and according to the described control signal process received the first digital signal.
3. digital audio care as claimed in claim 2, it is characterized in that, described sound volume regulation unit comprises:
Control module, for obtaining described control signal, and produces gain control signal according to the described control signal received;
Protocol conversion module, for carrying out protocol conversion to described first digital signal, to form the three digital signal be consistent with the interface protocol of described output interface adaptation; Wherein, described first digital signal meets the interface protocol with described input interface adaptation;
D/A converter module, for being converted to the first analog signal by described three digital signal;
Gain process module, for carrying out gain process according to described gain control signal to described first analog signal, to form the second analog signal; And
Analog-to-digital conversion module, for described second analog signal is converted to described second digital signal, and transfers to described output interface.
4. digital audio care as claimed in claim 1, it is characterized in that, described sound card main body comprises:
Usb audio controller, it is integrated with USB input channel and USB output channel, to be received first digital signal be consistent with USB interface agreement of described input interface input by described USB input channel, and be converted to described second digital signal be consistent with the interface protocol of described output interface adaptation, or, the second digital data transmission extremely described output interface will be consistent with USB interface agreement by described USB output channel.
5. digital audio care as claimed in claim 1, it is characterized in that, described sound card main body comprises:
Numeral isolated location, is connected between described input interface and output interface, isolates for signal.
6. digital audio care as claimed in claim 1, it is characterized in that, the type of described input, output interface comprise in AES audio interface, coaxial audio interface, optical fiber audio interface, 6.5mm audio interface, 3.5mm audio interface, USB interface any one or multiple.
7. digital audio care as claimed in claim 6, it is characterized in that, described 3.5mm audio interface is four-part form audio interface, and it comprises four signal transmission passages, adopts wherein two signal transmission passages to be respectively used to transmission first, second digital signal described.
8. digital audio care as claimed in claim 1, it is characterized in that, described sound card main body also comprises: be arranged at the audio effect processing unit between described input interface and described output interface, for forming the second digital signal after carrying out audio effect processing to described first numeral and exporting described output interface to.
9. a digital audio care system, is characterized in that, comprising: digital microphone and digital audio care;
Described digital microphone comprises: the pickup unit be electrically connected successively, AD conversion unit, conversion unit of protocol and digital audio interface, and described digital audio interface and described digital audio care are electrically connected;
Described digital audio care comprises: sound card main body and the input interface be electrically connected with described sound card main body and output interface, wherein, described input interface is for receiving the first digital signal and inputing to described sound card main body, by described sound card main body the second digital signal formed to described first Digital Signal Processing and transfer to described output interface, exporting external equipment to for described output interface.
10. digital audio care system as claimed in claim 9, it is characterized in that, described digital audio interface comprise in AES audio interface, coaxial audio interface, optical fiber audio interface, 6.5mm audio interface, 3.5mm audio interface, USB interface any one or multiple.
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| CN201520616372.7U CN204836548U (en) | 2015-08-17 | 2015-08-17 | Numeral sound card and system thereof |
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| CN201520616372.7U CN204836548U (en) | 2015-08-17 | 2015-08-17 | Numeral sound card and system thereof |
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| CN201520616372.7U Expired - Fee Related CN204836548U (en) | 2015-08-17 | 2015-08-17 | Numeral sound card and system thereof |
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