CN207835779U - A kind of external USB sound cards - Google Patents

Abstract

The utility model is related to a kind of external USB sound cards, including：Power supply unit, first interface, authentication unit, processing unit and second interface, said supply unit provides electric power to USB sound cards and/or Lightning interface equipments, the second interface connects PC, and the processing unit is used to audio stream being converted into I2S formatted datas；Wherein：After the authentication unit interacts certification with the Lightning interface equipments, audio stream is transmitted between the first interface and the Lightning interface equipments.The utility model is related to external USB sound cards support the transmission of real-time two way audio, while apple Lightning interface equipments can also be given to power, fill up at present the blank of the external sound card of Lightning interface equipments on the market.

Description

A kind of external USB sound cards

Technical field

The utility model belongs to the communications field, and in particular to a kind of external USB sound cards.

Background technology

With outdoor live streaming, shared KTV etc. needs the appearance with mobile phone MIC application scenarios, people to need better pickup Equipment is realized and mobile device or real-time and lossless transmission audio stream between PC.Currently, apple brand on the market Equipment is more to external equipment limit, especially novel Lightning interfaces, and there are no corresponding external USB sound cards.Because Its main difficult point with how with apple equipment carry out data conversion dock, realize the intercommunication of audio data.Therefore, it is necessary to A kind of external USB sound cards that can be docked with apple Lightning interface equipments of utility model, to allow people that can acquire higher The audio of quality.

Utility model content

In view of the above-mentioned problems, the purpose of this utility model is to provide a kind of external USB sound cards, to fill up in the prior art Corresponding external USB sound cards there is no to be docked with the Lightning interface equipments of apple equipment.

To achieve the above object, the utility model takes following technical scheme：

A kind of external USB sound cards in the utility model, including：Power supply unit, first interface, authentication unit, processing are single Member and second interface, said supply unit provide electric power to USB sound cards and/or Lightning interface equipments, and described second connects Mouth connection PC, the processing unit are used to audio stream being converted into I2S formatted datas；Wherein：The authentication unit with it is described After Lightning interface equipments interact certification, sound is transmitted between the first interface and the Lightning interface equipments Frequency flows.

Above-mentioned external USB sound cards, it is preferred that the authentication unit and processing unit use AV3425a chips.

Above-mentioned external USB sound cards, it is preferred that the second interface includes：EEPROM and USB chips, the USB chips I2S formatted datas are transferred to the PC by serial port form.

Above-mentioned external USB sound cards, it is preferred that the USB sound cards further include：I2S audio data bus, for it is described I2S formatted datas are transmitted between USB chips.

Above-mentioned external USB sound cards, it is preferred that said supply unit includes the first pressure unit and the second pressure unit, First pressure unit exports first voltage, and second pressure unit exports second voltage.

Above-mentioned external USB sound cards, it is preferred that first pressure unit is that AOZ1051 is depressured chip, second decompression Unit is that LM1117S18 is depressured chip.

Above-mentioned external USB sound cards, it is preferred that the model SSS1629A5-U6C of the USB chips.

Above-mentioned external USB sound cards, it is preferred that the model 24C0X of the EEPROM.

The external USB sound cards of the utility model can be docked with apple Lightning interface equipments, and people can acquire Higher-quality audio, and the Lightning interface equipments of apple can also be given to provide power supply.

Description of the drawings

Fig. 1 is a kind of structural schematic diagram for external USB sound cards that the utility model embodiment is provided；

Fig. 2 is the structural schematic diagram for the first interface that the utility model embodiment is provided；

Fig. 3 is a kind of structural schematic diagram for encryption trusted authentication chip that the utility model embodiment is provided；

Fig. 4 is a kind of structural schematic diagram for USB chips that the utility model embodiment is provided；

Fig. 5 is the structural schematic diagram for the power supply unit that the utility model embodiment is provided.

Specific implementation mode

The utility model is described in detail with reference to the accompanying drawings and examples.

The utility model embodiment provides a kind of external USB sound cards, as shown in Figure 1, specifically including：Power supply unit 101, One interface 102, authentication unit 103, processing unit 104 and second interface 105, said supply unit 101 to USB sound cards and/ Or Lightning interface equipments provide electric power, the second interface 105 connects PC, and the processing unit 104 is used for audio stream It is converted into I2S formatted datas；Wherein：After the authentication unit 103 interacts certification with the Lightning interface equipments, Audio stream is transmitted between the first interface 102 and the Lightning interface equipments.That is, the second of PC will be connected Interface 105 is connected with PC, and the first interface 102 for connecting apple Lightning interface equipments and apple Lightning interfaces are set It is standby to be connected.Specifically, interact certification by authentication unit and Lightning interface equipments, by can be with after certification Real-time Transmission audio stream between Lightning interface equipments is realized in Lightning interface equipments and the utility model embodiment USB sound cards between be capable of the lossless audio stream of transmitted in both directions two-channel, allow people that can acquire higher-quality audio, and also The Lightning interface equipments of apple can be given to provide power supply.Specifically, Fig. 2 is the structural schematic diagram of the first interface, Middle LAM2PWR pins are the supply port of Lightning interface equipments；LAM2D+ pins are positive input/output；LAM2D- draws Foot is cathode input/output.LAM2DW pins are the delivery outlet of audio stream.

A kind of external USB sound cards that the utility model embodiment provides, preferably, the authentication unit and processing unit Using AV3425a chips.The chip can be connected by the Lightning interface equipments of IAP2 agreements and Apple Inc., it is ensured that Lightning interface equipments can identify the external USB sound cards, it is ensured that voice-frequency channel it is unimpeded.In a preferred embodiment In, using AV3425a chips as main process task chip, major function is the connection certification completed with Lightning interface equipments And the reception and processing of audio stream, and audio stream is converted into I2S formatted datas.Preferably, as shown in figure 3, being MFI CP 2.0C (MFI337S3959) encrypts trusted authentication chip, is mainly used for completing certification with the authentication unit.In specific embodiment, After the external USB sound cards are connect with Lightning interface equipments, communication authentication can be first carried out with MFI337S3959 chips, it is double Side, which confirms, to complete, and can just carry out normal data transmission.Wherein, LAM2_I2S_DATA_IN pins are serial data SDATA's Input, the audio data that the complement of two's two's complement indicates is by the pin from the first interface to its transmission data.LAM2_I2S_ DATA_OUT is the output pin of serial data SDATA, and the audio data that the complement of two's two's complement indicates is by the pin to USB sound cards Transmission.LAM2_I2S_LRCK is frame clock LRCK (WS) pin, is used for the data of switching right and left sound channel.LRCK is that " 1 " indicates just Transmission be right channel data, then indicate that is transmitted is the data of L channel for " 0 ", the frequency of LRCK is equal to sampling Frequency.LAM2_I2S_BCLK pins are serial clock SCLK, that is, correspond to each data of digital audio, SCLK has 1 arteries and veins Punching, wherein：Frequency=2 of SCLK × sample frequency × sampling resolution.

A kind of external USB sound cards that the utility model embodiment provides, preferably, the second interface includes：EEPROM And I2S formatted datas are transferred to the PC by USB chips, the USB chips by serial port form.Specifically, described EEPROM is external EEPROM, the storage inside firmware program of USB chips.Preferably, the model of the USB chips SSS1629A5-U6C；The model 24C0X of the EEPROM.Specifically as shown in figure 4, for USB chips SSS1629A5-U6C's Structural schematic diagram, wherein LAM2_I2S_DATA_IN pins are the input terminal of serial data SDATA, the sound that the complement of two's two's complement indicates Frequency is transmitted according to from USB chips to processing unit.LAM2_I2S_DATA_OUT pins be serial data SDATA output end, two The audio data that complement on n n indicates is transmitted from processing unit to USB chips.LAM2_I2S_IN_LRCK pins are frame clock LRCK (also referred to as WS), is used for the data of switching right and left sound channel.LRCK is that " 1 " indicates that is transmitted is the data of right channel, is " 0 " then indicates that is transmitted is the data of L channel.The frequency of LRCK is equal to sample frequency.LAM2_I2S_IN_BCLK pins For serial clock SCLK, it is also bit clock (BCLK), that is, corresponds to each data of digital audio, SCLK has 1 pulse. Frequency=2 of SCLK × sample frequency × sampling resolution.

A kind of external USB sound cards that the utility model embodiment provides, preferably, the USB sound cards further include：I2S sounds Frequency data/address bus, for transmitting I2S formatted datas, the I2S audio data bus and the USB between the USB chips The I2S audio interface of chip is docked, to realize that audio stream unimpeded can transmit.

A kind of external USB sound cards that the utility model embodiment provides, preferably, said supply unit includes the first decompression Unit and the second pressure unit, first pressure unit export first voltage, second electricity of the second pressure unit output Pressure.Specifically, as shown in figure 5, first pressure unit is depressured chip using AOZ1051, second pressure unit is LM1117S18 is depressured chip.Since the external USB sound cards normal work needs to use the direct current of two kinds of voltage of 3.3V and 1.8V Electricity.Therefore first directly acquire the direct current of 5V, the direct current that chip obtains 3.3V be depressured by AOZ1051,3.3V using LM1117S18 is depressured IC to obtain 1.8V direct currents.

In conclusion a kind of external sound card described in the utility model embodiment can be used for shared KTV and platform be broadcast live Intercommunication etc., support real-time two way audio transmission, user, can be with by the song that microphone is sung on shared KTV It is transferred in apple equipment by Lightning interface equipments in real time, is then shared with spectators by the way that platform is broadcast live.It can also The lossless audio for exporting two-channel in real time from apple equipment flow to the ends PC, therefore what is transmitted is not existing audio file. Simultaneously, additionally it is possible to power to apple Lightning interface equipments.Current Apple Lightning interfaces on the market have been filled up to set The blank of standby external sound card.

Those skilled in the art will also be appreciated that the various illustrative components, blocks that the utility model embodiment is listed (illustrative logical block), unit and step can pass through the combination of electronic hardware, computer software, or both It is realized.To clearly show that the replaceability (interchangeability) of hardware and software, above-mentioned is various illustrative Component (illustrative components), unit and step universally describe their function.Such function It is that the design requirement for depending on specific application and whole device is realized by hardware or software.Those skilled in the art can For each specific application, various methods can be used to realize the function, but this realization is understood not to surpass Go out the range of the utility model embodiment protection.

Various illustrative logical blocks or unit described in the utility model embodiment can pass through general procedure Device, digital signal processor, application-specific integrated circuit (ASIC) or other programmable logic devices, discrete gate or transistor logic, Described function is realized or is operated in discrete hardware components or the design of any of the above described combination.General processor can be micro- Processor, optionally, the general processor may be any traditional processor, controller, microcontroller or state machine.Place Reason device can also be realized by the combination of computing device, such as digital signal processor and microprocessor, multi-microprocessor, One or more microprocessors combine a digital signal processor core or any other like configuration to realize.

The step of method or algorithm described in the utility model embodiment, can be directly embedded into hardware, processor executes Software module or the two combination.Software module can be stored in RAM memory, flash memory, ROM memory, EPROM Other any form of storages in memory, eeprom memory, register, hard disk, moveable magnetic disc, CD-ROM or this field In medium.Illustratively, storaging medium can be connect with processor, so that processor can read letter from storaging medium Breath, and can be to storaging medium stored and written information.

In one or more illustrative designs, above-mentioned function described in the utility model embodiment can be hard Part, software, firmware or the arbitrary of this three combine to realize.If realized in software, these functions can store and computer On readable medium, or with one or more instruction or code form be transmitted on the medium of computer-readable.Computer readable medium Including computer storaging medium and convenient for allow computer program to be transferred to from a place telecommunication media in other places.Store matchmaker Jie can be that any general or special computer can be with the useable medium of access.For example, such computer readable media can be with Including but not limited to RAM, ROM, EEPROM, CD-ROM or other optical disc storage, disk storage or other magnetic storage devices, or It is other it is any can be used for carry or store with instruct or data structure and it is other can be general or special by general or special computer The medium of the program code of different processor reading form.In addition, any connection can be properly termed computer-readable matchmaker It is situated between, for example, if software is to pass through a coaxial cable, optical fiber electricity from a web-site, server or other remote resources Cable, twisted-pair feeder, Digital Subscriber Line (DSL) are also contained in institute with wireless way for transmitting such as example infrared, wireless and microwaves In the computer readable medium of definition.The disk (disk) and disk (disc) include compress disk, radium-shine disk, CD, DVD, floppy disk and Blu-ray Disc, disk is usually with magnetic duplication data, and disk usually carries out optical reproduction data with laser.On The combination stated can also be included in computer readable medium.

The utility model is not limited to above-mentioned preferred forms, anyone can obtain under the enlightenment of the utility model Other various forms of products, however, make any variation in its shape or structure, it is every that there is same as the present application or phase Approximate technical solution, all falls within the scope of protection of the utility model.

Claims (8)

1. a kind of external USB sound cards, which is characterized in that including：Power supply unit, first interface, authentication unit, processing unit and Second interface, said supply unit provide electric power, the second interface connection to USB sound cards and/or Lightning interface equipments PC, the processing unit are used to audio stream being converted into I2S formatted datas；Wherein：The authentication unit and the Lightning After interface equipment interacts certification, audio stream is transmitted between the first interface and the Lightning interface equipments.

2. a kind of external USB sound cards according to claim 1, which is characterized in that the authentication unit and processing unit Using AV3425a chips.

3. a kind of external USB sound cards according to claim 1, which is characterized in that the second interface includes：EEPROM with And I2S formatted datas are transferred to the PC by USB chips, the USB chips by serial port form.

4. a kind of external USB sound cards according to claim 3, which is characterized in that the USB sound cards further include：I2S audios Data/address bus, for transmitting I2S formatted datas between the USB chips.

5. a kind of external USB sound cards according to claim 1, which is characterized in that said supply unit includes the first decompression Unit and the second pressure unit, first pressure unit export first voltage, second electricity of the second pressure unit output Pressure.

6. a kind of external USB sound cards according to claim 5, which is characterized in that first pressure unit is AOZ1051 It is depressured chip, second pressure unit is that LM1117S18 is depressured chip.

7. a kind of external USB sound cards according to claim 3, which is characterized in that the model of the USB chips SSS1629A5-U6C。

8. a kind of external USB sound cards according to claim 3, which is characterized in that the model 24C0X of the EEPROM.