CN106488044A - A kind of mobile phone of mobile sound card, system and implementation method - Google Patents
A kind of mobile phone of mobile sound card, system and implementation method Download PDFInfo
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- CN106488044A CN106488044A CN201611193131.1A CN201611193131A CN106488044A CN 106488044 A CN106488044 A CN 106488044A CN 201611193131 A CN201611193131 A CN 201611193131A CN 106488044 A CN106488044 A CN 106488044A
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- mobile phone
- equipment
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- sound card
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
- H04M1/72409—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality by interfacing with external accessories
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
- H04M1/72442—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality for playing music files
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- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Telephone Function (AREA)
Abstract
The invention discloses a kind of mobile phone of mobile sound card, system and implementation method, the mobile phone includes：USB OTG equipment, USB unwrapper unit, mobile phone application processor, selector, the lossless DAC of high-fidelity and earphone amplifier；The USB OTG equipment connection USB unwrapper unit, mobile phone application processor；The USB unwrapper unit, mobile phone application processor connect selector respectively；The lossless DAC of the selector, high-fidelity, earphone amplifier are sequentially connected；When the equipment that detected connects, the USB OTG equipment carries out the identification of master-slave equipment to mobile phone；Application processor calls different device classes ID according to recognition result and carries out corresponding operation.By extending hi-fi music output action to mobile phone hardware design, so as to realize lifting musical qualities and the lossless tonequality of optional different-style high-fidelity by the processing module of earphone with respect to former teller machines.
Description
Technical field
The present invention relates to electronic device field, more particularly to a kind of mobile phone of mobile sound card, system and implementation method.
Background technology
Now, the portable mobile termianl such as mobile phone uses popularity rate more and more higher, the consumption electronic product in mobile terminal
Incidental function widely covers the every aspect of life, and multimedia function is consumer-elcetronics devices user using most
Application, the effect for lifting multimedia function in consumer-elcetronics devices are the problems that each producer need to consider.
Audio frequency and video are system designs, and it is the extremely complex system work of rear end design to improve the various indexs of audio-frequency test
Journey, at present, a lot of producers are only limited on the basis of oneself this product spend the accessory of higher costs to enter using more preferable device
Row raising is listened reward impression, improves tonequality.
High cost in prior art to the improvement of the effect of audio frequency and video.
Therefore, prior art has yet to be improved and developed.
Content of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of prior art, provides a kind of mobile sound card
Mobile phone, system and implementation method, by extending the mobile phone of hi-fi music output to mobile phone hardware design, solve prior art
In the technical problem of high cost that visual/audio effects are improved.
The technical scheme adopted by present invention solution technical problem is as follows：
A kind of mobile phone of mobile sound card, wherein, including：USB OTG equipment, USB unwrapper unit, mobile phone application processor, selection
The lossless DAC of device, high-fidelity and earphone amplifier；
The USB OTG equipment connection USB unwrapper unit, mobile phone application processor；Use answered by the USB unwrapper unit, mobile phone
Reason device connects selector respectively；The lossless DAC of the selector, high-fidelity, earphone amplifier are sequentially connected；
When the equipment that detected connects, the USB OTG equipment carries out the identification of master-slave equipment to mobile phone；Application processor root
Different device classes ID are called according to recognition result and carry out corresponding operation：When mobile phone is for main equipment, use answered by mobile phone
Reason device obtains corresponding ID value and mates corresponding feature operation；When mobile phone is from equipment, mobile phone application processor will connect
Configuration switches to USB unwrapper unit DAC lossless with high-fidelity to be connected, and the data signal after USB unwrapper unit is unpacked is input to
Analog signal is converted in the lossless DAC of high-fidelity, and analog signal is input in earphone amplifier is carried out power amplification, and be input into
Play out in earphone speaker.
The mobile phone of the mobile sound card, wherein, the system also includes：First DC-DC circuit, the second DC-DC circuit；
First DC-DC circuit DAC lossless with high-fidelity is connected, and carries out for the voltage to being input to the lossless DAC of high-fidelity
Step-down is processed；
Second DC-DC circuit is connected with earphone amplifier, carries out step-down process for the voltage to being input to earphone amplifier.
The mobile phone of the mobile sound card, wherein, the identification of USB OTG equipment opponent's machine master-slave equipment：When detecting
When the ID pin of equipment is grounded, then equipment is main equipment；When the ID pin of the equipment that detects is floating, then equipment be from setting
Standby.
The mobile phone of the mobile sound card, wherein, the USB unwrapper unit is used for removing usb protocol related protocol information, also
Originally it was the pure PCM and DSD data for passing over.
The mobile phone of the mobile sound card, wherein, No. ID interface descriptor for defining equipment of the device class.
The mobile phone of the mobile sound card, wherein, if a device class is whole equipment, by No. ID preservation of device class
Equipment class codomain in interface descriptor；If a device class is an interface of equipment, by No. ID preservation of device class
Interface class codomain in interface descriptor.
A kind of system of mobile sound card, wherein, including：Teller machines, the hand of mobile sound card as described in claim 1-6
Machine；Mobile phone of the teller machines by USB line with mobile sound card is attached.
A kind of implementation method of the mobile phone of mobile sound card, wherein, including：
Step A, when detected equipment connect when, the USBOTG equipment carries out the identification of master-slave equipment to mobile phone；
Step B, application processor call different device classes ID according to recognition result and carry out corresponding operation.
The implementation method of the mobile phone of described mobile sound card, wherein, step B is specifically included：
B11, when mobile phone is for main equipment, mobile phone application processor obtains corresponding ID value and simultaneously mates corresponding feature operation；
B12, when mobile phone is from equipment, mobile phone application processor switches to USB unwrapper unit and high-fidelity nothing by configuration is connected
DAC connection is damaged, the digital audio and video signals of input is decoded, is played out after power amplification.
The implementation method of the mobile phone of described mobile sound card, wherein, step B12 is specifically included：
B121, USB unwrapper unit is unpacked after data signal be input in the lossless DAC of high-fidelity and be converted to analog signal；
B122, analog signal is input in earphone amplifier and carries out power amplification；
B123, the analog signal exported by earphone amplifier is input in earphone speaker plays out.
The invention provides a kind of mobile phone of mobile sound card, system and implementation method, from lossless high-fidelity DAC device
And the ear of high-quality is put or prevents to be placed in multimedia terminal equipment, equivalent to the USB sound card of external high-fidelity, mobile phone
Portability has great advantage；By extending the mobile phone effect of hi-fi music output to mobile phone hardware design, so as to realize passing through
The processing module of earphone is with respect to former teller machines lifting musical qualities and the lossless tonequality of optional different-style high-fidelity.
Description of the drawings
Fig. 1 is the structured flowchart of the mobile phone of the mobile sound card of the present invention.
Fig. 2 is the corresponding relation figure of the common equipment classification of the present invention and No. ID.
Fig. 3 is the structured flowchart of the system of the mobile sound card of the present invention.
Fig. 4 is the flow chart of the implementation method of the mobile phone of the mobile sound card of the present invention.
Specific embodiment
For making the objects, technical solutions and advantages of the present invention clearer, clear and definite, develop simultaneously embodiment pair referring to the drawings
The present invention is further described.It should be appreciated that specific embodiment described herein is only in order to explain the present invention, and without
In the restriction present invention.
The present invention is acted on by extending the mobile phone of hi-fi music input to mobile phone hardware design, and audio output signal is led to
Cross USB interface and interior of mobile phone is delivered to, broadcasting is processed and is exported by interior of mobile phone high-fidelity module, realize to musical qualities
Lifting.
As shown in figure 1, the structured flowchart of the mobile phone for the mobile sound card that improves design in the present invention to mobile phone hardware,
The mobile phone 20 includes：USB OTG equipment 201, USB unwrapper unit 202, mobile phone application processor 203, selector 204, Gao Bao
Very lossless DAC205 and earphone amplifier 206；
The USB OTG equipment 201 connects USB unwrapper unit 202, mobile phone application processor 203.USB OTG equipment 201 is two
With OTG, it is allowed to which equipment both can be used as main equipment, it is also possible to as from equipment, in otg standard, can be with the connection side of cable
Formula come determine equipment for main equipment still from equipment.OTG (On-The-Go), OTG technology are realities in the case of without main frame
The data transmission of existing equipment room.When the ID pin that USB OTG equipment 201 detects equipment is grounded, then equipment is main equipment；When
When USB OTG equipment 201 detects the ID pin floating of equipment, then equipment be from equipment.USB OTG equipment 201 is completely simultaneous
On the basis of holding USB2.0 standard, power management function is increased, and certain main equipment detectability can be provided, support that master sets
Standby circular order agreement and session request agreement.In the present invention, USB OTG equipment 201 is used for carrying out mobile phone 20 knowledge of master-slave equipment
Not.
USB unwrapper unit 202, mobile phone application processor 203 connect selector 204, selector 204, high-fidelity nothing respectively
Damage DAC205, earphone amplifier 206 to be sequentially connected.Selector 204 carries out the switching of intermodule annexation and selects：Work as device class
During No. ID ID for main equipment, lossless for high-fidelity DAC205 is attached with mobile phone application processor 203；Work as device class
No. ID be from the ID of equipment when, lossless for high-fidelity DAC205 and USB unwrapper unit 202 is attached.The cutting of selector 204
Change operation to be controlled according to mobile phone application processor 203.Mobile phone application processor 203 calls difference according to recognition result
Device class ID and carry out corresponding operation：When mobile phone is for main equipment, obtains corresponding ID value and mate corresponding work(
Can operation；When mobile phone is from equipment, it is lossless that the data signal after USB unwrapper unit 202 is unpacked is input to high-fidelity
Analog signal is converted in DAC205, and analog signal is input in earphone amplifier 206 is carried out power amplification, and be input to ear
Play out in machine loudspeaker 30.DAC（Digital to analog converter）It is digital analog converter, by one kind
Data signal is converted to the equipment of analog signal.
The equipment being attached in bus can be the equipment of the Complete customization for needing specific driver, it is also possible to belong to
Certain device class.Device class defines the interface descriptor of corresponding device, and device class has USB design forum device work
Group determines, and distributes No. ID.General operation system provides universal driver for the running of holding equipment, is a driving journey
Sequence can be used for the equipment of all such device class.
The address of No. ID preservation of device class simultaneously differs.If a device type is whole equipment, by device class
No. ID equipment class codomain for being stored in interface descriptor；If a device type is an interface of equipment, by device class
No. ID interface class codomain for being stored in interface descriptor.They all take a byte, be up to 253 kinds device classes.Every kind of
Device class is optional to support subclass and agreement sub-definite, for the continuous revision of device type.
As shown in Fig. 2 for common equipment classification and the corresponding relation figure of No. ID.A kind of device class can correspond to multiple setting
Standby, such as device class is Large Copacity access equipment, and its corresponding No. ID is 0x08, and corresponding equipment can be hard for USB flash disk, movement
Disk, memory card reader or digital camera.No. ID indicates nothing equipment for 0x00, sets when the equipment class codomain of interface descriptor is preserved
When standby category IDs number are 0x00, operating system can check No. ID of the interface class value of each interface further to determine its equipment class
Not.
The audio digital signals for being transferred to earphone are that master-slave equipment is attached by USB interface with USB as carrier
, only audio digital signals are encrypted into after packet according to usb protocol and smoothly could be sent to from setting from main equipment
Standby.Audio digital signals are input to from after equipment end to be needed to be decrypted the packet of encryption, encrypts in main equipment before removing
The data convert related to usb protocol become the pure PCM and DSD data for passing over, the function pass through USB unwrapper unit 202
Realize, the USB unwrapper unit 202 supports that the fully sampled rate of PCM and DSD data is unpacked.In addition, USB unwrapper unit 202 is directly supported
The USB interface of USB2.0 standard, and support two I2S interface turnover, it is ensured that high speed data transfer does not lose.PCM
(Pulse Code Modulation) is pulse code modulation, and DSD (Direct Stream Digital) is direct bit stream
Digital coding.
When device class ID is from the ID of equipment, lossless for high-fidelity DAC205 and USB unwrapper unit 202 is carried out
Connection.Pure PCM data is passed through high accuracy number converter by the lossless DAC205 of high-fidelity, is converted into simulation letter from data signal
Number, to the full extent Digital Audio Data signal lossless can be reduced into the analog signal before coding and be input to rear end earphone fortune
In putting.Preferably, sample rate reaches as high as 384kbps, and sampling resolution is the precision of 24bit.At present, the lossless DAC205 of high-fidelity
Support that highest sampling resolution is 32bit and data below, support the voice data that can decode that at present to greatest extent.Property
On energy, the dynamic range of the lossless DAC205 of high-fidelity reaches 127dB, and total distortion can reach -120dB.Lossless by high-fidelity
Need analog signal is input in earphone amplifier 206 after DAC205 and be amplified, corresponding for earphone amplifier 206 parameter is carried out
Join, the signal to noise ratio of current earphone amplifier 206 is 122dB, dynamic range is -117dB, can support 600 under 2V rated voltage
High impedance earphone, further ensure the quality of audio frequency.
The system also includes：First DC-DC circuit, the second DC-DC circuit；First DC-DC circuit and high-fidelity
Lossless DAC connection, carries out step-down process for the voltage to being input to the lossless DAC205 of high-fidelity；Second DC-DC circuit
Be connected with earphone amplifier 206, step-down process is carried out for the voltage to being input to earphone amplifier.As USB provides the voltage of 5V
Output, in order to coordinate modules to carry out normal work, need to be depressured by DC-DC circuit.The lossless DAC of such as high-fidelity is just
Often the voltage of work is 3.3V, then need, by the first DC-DC circuit, 5V voltage is switched to 3.3V voltage.Such as earphone amplifier is normal
The voltage of work is 1.8V, then need, by the second DC-DC circuit, the 3.3V voltage that lossless for high-fidelity DAC is exported is switched to 1.8V electricity
Pressure.DC-DC is a kind of device of the electric energy that the electric energy of a magnitude of voltage is changed in DC circuit another magnitude of voltage.
Based on the mobile phone of above-mentioned mobile sound card, present invention also offers a kind of system of mobile sound card, as shown in figure 3, institute
The system of stating includes：Teller machines 10, the mobile phone 20 of above-mentioned mobile sound card and earphone speaker 30；Teller machines 10 pass through USB line
It is attached with the mobile phone 20 of mobile sound card, earphone speaker 30 is connected by the receiver J-Horner on the mobile phone 20 of mobile sound card
Connect.Teller machines 10 are generally the consumer electronics teller machines such as CD/DVD, and the teller machines 10 are by pure digi-tal signal through audio
Deng process after original PCM audio data is activation to mobile phone, mobile phone receive the signal and through decoding, power amplification etc. operate after
It is input to earphone speaker to play out.
Based on the mobile phone of above-mentioned mobile sound card, as shown in figure 4, a kind of present invention also offers reality of the mobile phone of mobile sound card
The flow chart of existing method, the step are specifically included：
When the equipment that detected connects, the USB OTG equipment 201 carries out the identification of master-slave equipment to mobile phone；Specific logical
Cross USB OTG equipment 201 carry out master-slave equipment knowledge method for distinguishing as described above.
Mobile phone application processor 203 calls different device classes ID according to recognition result and carries out corresponding operation.
The present invention is mobile phone for main equipment still from equipment, carries out different operations according to handset identity result.Set based on the mobile phone
When standby, mobile phone application processor 203 obtains corresponding ID value and mates corresponding feature operation；When mobile phone is from equipment, hand
Machine application processor 203 switches to the DAC205 lossless with high-fidelity of USB unwrapper unit 202 to be connected by configuration is connected, by input
Digital audio and video signals are decoded, play out after power amplification.
When mobile phone is from equipment, the ID write mobile phone application processor 203 that will read, actively send out according to usb protocol
No. ID is sent to teller machines 10, teller machines 10 now are carried out handshake operation and read device id number with mobile phone.In the present invention
Mobile phone is used as the sound effect device from equipment, is compareed common equipment classification and the corresponding table of No. ID, can be obtained device id number
For 0x01.When read mobile phone device id number simultaneously, lossless for high-fidelity DAC205 is connected configuration with mobile phone application processor 203
The DAC205 lossless with high-fidelity of USB unwrapper unit 202 is switched to be connected configuration.Now, the path of mobile phone, music signal have switched
USB path is switched to by management to realize the purpose for using mobile phone as sound card.
After switching to the DAC205 lossless with high-fidelity of USB unwrapper unit 202 to be connected configuration, USB unwrapper unit 202 is solved
Data signal after bag is input in the lossless DAC205 of high-fidelity and is converted to analog signal；Analog signal is input to earphone amplifier
In carry out power amplification；The analog signal exported by earphone amplifier is input in earphone speaker and is played out.
In sum, the invention provides a kind of mobile phone of mobile sound card, system and implementation method, are protected from lossless height
The ear of true DAC device and high-quality is put or prevents to be placed in multimedia terminal equipment, equivalent to the USB sound of external high-fidelity
Card, the portability of mobile phone have great advantage；By extending the mobile phone effect of hi-fi music output to mobile phone hardware design, so as to
Realize lifting musical qualities and optional different-style high-fidelity nothing by the processing module of earphone with respect to former teller machines
Damage tonequality.Certainly, one of ordinary skill in the art will appreciate that realizing all or part of flow process in above-described embodiment method, it is
Related hardware can be instructed by computer program（As processor, controller etc.）To complete, described program can be stored in
In the storage medium of one embodied on computer readable, the program is may include upon execution as the flow process of above-mentioned each method embodiment.Wherein
Described storage medium can be memory, magnetic disc, CD etc..
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, and for those of ordinary skills, can
To be improved according to the above description or convert, for example, all these modifications and variations should all belong to right appended by the present invention and want
The protection domain that asks.
Claims (10)
1. a kind of mobile phone of mobile sound card, it is characterised in that include：USB OTG equipment, USB unwrapper unit, mobile phone application are processed
The lossless DAC of device, selector, high-fidelity and earphone amplifier；
The USB OTG equipment connection USB unwrapper unit, mobile phone application processor；Use answered by the USB unwrapper unit, mobile phone
Reason device connects selector respectively；The lossless DAC of the selector, high-fidelity, earphone amplifier are sequentially connected；
When teller machines connection has been detected, the USB OTG equipment carries out the identification of master-slave equipment to mobile phone；Application is processed
Device calls different device classes ID according to recognition result and carries out corresponding operation：When mobile phone is for main equipment, mobile phone should
Corresponding ID value is obtained with processor and mate corresponding feature operation；When mobile phone is from equipment, mobile phone application processor will
Connection configuration switches to USB unwrapper unit DAC lossless with high-fidelity to be connected, and the data signal after USB unwrapper unit is unpacked is defeated
Enter and analog signal is converted to in the lossless DAC of high-fidelity, and analog signal is input in earphone amplifier carries out power amplification, and
It is input in earphone speaker and plays out.
2. the mobile phone of mobile sound card according to claim 1, it is characterised in that the system also includes：First DC-DC electricity
Road, the second DC-DC circuit；
First DC-DC circuit DAC lossless with high-fidelity is connected, and carries out for the voltage to being input to the lossless DAC of high-fidelity
Step-down is processed；
Second DC-DC circuit is connected with earphone amplifier, carries out step-down process for the voltage to being input to earphone amplifier.
3. the mobile phone of mobile sound card according to claim 1, it is characterised in that the USB OTG equipment opponent owner is from setting
Standby identification：When the ID pin of the equipment that detects is grounded, then equipment is main equipment；When the ID pin of the equipment that detects is floating
When, then equipment be from equipment.
4. the mobile phone of mobile sound card according to claim 1, it is characterised in that the USB unwrapper unit is used for removing USB association
View related protocol information, is reduced to the pure PCM and DSD data for passing over.
5. the mobile phone of mobile sound card according to claim 1, it is characterised in that the device class ID defines equipment
Interface descriptor.
6. the mobile phone of mobile sound card according to claim 5 a, it is characterised in that if device class is whole equipment,
By No. ID equipment class codomain for being stored in interface descriptor of device class；If a device class is an interface of equipment,
By No. ID interface class codomain for being stored in interface descriptor of device class.
7. a kind of system of mobile sound card, it is characterised in that include：Teller machines, the movement as described in claim 1-6 is arbitrary
The mobile phone of sound card；Mobile phone of the teller machines by USB line with mobile sound card is attached.
8. a kind of implementation method of the mobile phone of mobile sound card, it is characterised in that include：
Step A, when detected equipment connect when, the USBOTG equipment carries out the identification of master-slave equipment to mobile phone；
Step B, application processor call different device classes ID according to recognition result and carry out corresponding operation.
9. the implementation method of the mobile phone of mobile sound card according to claim 8, it is characterised in that step B is specifically wrapped
Include：
B11, when mobile phone is for main equipment, mobile phone application processor obtains corresponding ID value and simultaneously mates corresponding feature operation；
B12, when mobile phone is from equipment, mobile phone application processor switches to USB unwrapper unit and high-fidelity nothing by configuration is connected
DAC connection is damaged, the digital audio and video signals of input is decoded, is played out after power amplification.
10. the implementation method of the mobile phone of mobile sound card according to claim 9, it is characterised in that the step B12 tool
Body includes：
B121, USB unwrapper unit is unpacked after data signal be input in the lossless DAC of high-fidelity and be converted to analog signal；
B122, analog signal is input in earphone amplifier and carries out power amplification；
B123, the analog signal exported by earphone amplifier is input in earphone speaker plays out.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611193131.1A CN106488044B (en) | 2016-12-21 | 2016-12-21 | Mobile phone and system for mobile sound card and implementation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611193131.1A CN106488044B (en) | 2016-12-21 | 2016-12-21 | Mobile phone and system for mobile sound card and implementation method |
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| CN106488044B CN106488044B (en) | 2021-01-08 |
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| WO2019084887A1 (en) * | 2017-11-03 | 2019-05-09 | 深圳传音通讯有限公司 | Sound quality conversion method and device for audio, terminal and computer-readable storage medium |
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| CN106488044B (en) | 2021-01-08 |
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