CN205029809U - Audio stream media play platform based on WIFI network - Google Patents
Audio stream media play platform based on WIFI network Download PDFInfo
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- CN205029809U CN205029809U CN201520791301.0U CN201520791301U CN205029809U CN 205029809 U CN205029809 U CN 205029809U CN 201520791301 U CN201520791301 U CN 201520791301U CN 205029809 U CN205029809 U CN 205029809U
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Abstract
The utility model discloses an audio stream media play platform based on WIFI network, including the audio stream media receiving element who connects gradually, real -time audio stream media decoding units, digital audio power amplifier unit and loudspeaker unit, still include power supply circuit and user interface, power supply circuit gives audio stream media receiving element, real -time audio stream media decoding units and digital audio power amplifier unit power supply, user interface is connected to audio stream media receiving element's GPIO interface. Audio stream media receiving element receives the digital audio signal that comes from the WIFI network, then decodes through real -time audio stream media decoding units, is play to the loudspeaker unit by the digital audio power amplifier unit propelling movement. The user passes through user interface and realizes the control to the broadcast platform. This scheme is applicable to the broadcast of network audio stream media.
Description
Technical field
The utility model relates to audio-frequence player device, especially relates to a kind of audio stream media play platform based on WIFI network.
Background technology
The convergence platform of audio signal progressively shifts from FM frequency modulation, CD music to the network platform, and the sound novel of network radio station, network, online music channel resource are more and more abundanter.In order to save download bandwidth, online music signal adopts multiple compress mode to store usually.
In practical application, although can pass through computer or mobile phone music playout software real-time playing network audio stream media, playback quality affects comparatively large by decoder capabilities, play power also very limited, user really can not appreciate the online music of high-quality simultaneously.For this reason, the audio stream media play hardware platform based on WIFI network of design specialist level is necessary.
State Intellectual Property Office of the People's Republic of China disclosed the patent documentation (publication number: CN101827251A) that name is called " a kind of method of playing network streaming media, device " on 09 08th, 2010, its device comprises: stream medium audio and video file address transmitting element, for sending the address of stream medium audio and video file to PC; Program inventory generation unit, for receiving the structure linked list data that PC generates according to the address of described stream medium audio and video file, and according to this data genaration alternative programs inventory, waits for the playing request order of user's input; Command sending unit, for sending the request command of playing stream media to PC, to obtain streaming media playing data by described PC to streaming media server; Broadcast unit, for receive PC forward streaming media playing data and the stream medium audio and video file play in this streaming media playing data.The network flow-medium playing device based on PC disclosed in this scheme, and unexposed special streaming media playing platform.
Summary of the invention
The utility model mainly solves the technical problem of the network audio stream media playing device of the shortage specialty existing for prior art, provide a kind of decoding effect good, play the high-power professional audio stream media play platform based on WIFI network.
The utility model is mainly solved by following technical proposals for above-mentioned technical problem: a kind of audio stream media play platform based on WIFI network, comprise audio stream media receiver unit, real-time audio Streaming Media decoding unit, digital audio power amplifying unit, loudspeaker unit, power circuit and user interface, the USB interface of described audio stream media receiver unit is connected to the input of digital audio power amplifying unit by real-time audio Streaming Media decoding unit, the output of described digital audio power amplifying unit connects loudspeaker unit, described power circuit is to audio stream media receiver unit, real-time audio Streaming Media decoding unit and digital audio power amplifying unit are powered, the GPIO(universal input that described user interface is connected to audio stream media receiver unit exports) interface.
Audio stream media receiver unit receives the digital audio and video signals from WIFI network, then by real-time audio Streaming Media decoding unit decodes, is pushed to loudspeaker unit plays by digital audio power amplifying unit.User realizes the control to playing platform by user interface.
As preferably, described audio stream media receiver unit comprises flush bonding processor, DDR dynamic memory, firmware memory and plate and carries antenna, described DDR dynamic memory, firmware memory and plate carry antenna and are all connected to flush bonding processor, and described flush bonding processor is connected to real-time audio Streaming Media decoding unit by USB interface.
Plate carries antenna and receives WIFI signal, amplifies and decode through flush bonding processor internal amplifier.After powering on, firmware is called in DDR dynamic memory from firmware memory and is run.Flush bonding processor receives the TCP/IP control command based on mobile phone A PP or server end, obtain according to order and specify audio frequency Streaming Media, to audio stream media Ethernet Packet analyzing, take out audio stream information, and deliver to audio decoding unit from USB port, control the parameters such as the audio clock rate of decoder according to stream media information simultaneously.
As preferably, the W9751G6JB-25 of described flush bonding processor to be MT7620A, DDR dynamic memory be 512M, firmware memory is MX25L6406E.
As preferably, described real-time audio Streaming Media decoding unit comprises decoding processor and audio clock generative circuit, described audio clock generative circuit is connected to decoding processor, described decoding processor connects audio stream media receiver unit by USB interface, decoding processor is by I2S(serial digital audio bus protocol) interface connection digital audio power amplification unit, decoding processor is also by I2C(twin wire universal serial bus) interface connects digital audio power amplification unit and audio clock produces circuit.
Audio clock generative circuit is made up of active crystal oscillator and phase-locked chip, produce the master clock needed for audio decoder of high stability, shift clock and frame clock, the audio stream that USB port receives by decoding processor becomes PCM digital audio, and changes into I2S formatted output.The embedded algorithm of decoding processor can implement decoding process to compressed audios such as MP3, WMV, AAC, M4A, WAV.
As preferably, described decoding processor is STM32F407A.
As preferably, digital audio power amplifying unit comprises the first digital audio power amplification chip and the second digital audio power amplification chip, the input of two digital audio power amplifier chip all passes through I2S interface and connects real-time audio Streaming Media decoding unit, the control end of two digital audio power amplifier chip all passes through I2C interface and connects audio stream media decoding unit, the output of the first digital audio power amplification chip connects the left loudspeaker of loudspeaker unit and right loudspeaker, the output of the second digital audio power amplification chip connects the bass horn of loudspeaker unit.
I2S digital audio is amplified by digital audio power amplifying unit, and the pwm power signal producing Ternary modulation exports.
As preferably, described digital audio power amplification chip is STA339BW.
As preferably, described user interface comprises two four-ways and touches chip and 7 soft-touch controls, first four-way touches chip and is connected with 4 soft-touch controls, and the second four-way touches chip and connects 3 soft-touch controls, is provided with a patch light-emitting diode below each soft-touch control.
User interface realizes playing/suspending, and upper one is first, next, a upper catalogue, the functions such as next catalogue.Patch light-emitting diode provides the backlight of soft-touch control.
The 10V-18V DC power supply that outside inputs by power circuit is converted to+5V ,+3.3V and+1.8V DC power supply, and produces the reset signal needed for processor.Power circuit adopts the DC/DC chip LM2596-5V of TI company to produce+5V/3A direct current, and the EV8122 of Everanalog company produces+3.3V/2A DC power supply, and the LM1117 of TI company produces+1.8V ,/0.5A DC power supply, and reset circuit is adopted and realized by MAX809.
Whole hardware is decoded by audio stream media receiver, real-time audio Streaming Media and digital power amplifying circuit three pieces of pcb boards form, and passes through socket connection between pcb board by flat cable.
The beneficial effect that the utility model brings is, the WIFI network of (1) flush bonding processor receives isolates with audio decoder, has stopped the digital interference of WIFI reception to audio decoder; (2) adopt the microcontroller decoding of low cost, band floating point processing unit FPU, both ensure that decoding quality, and again reduced design cost; (3) adopt the many group audio clock of high-precision phase lock circuitry generation needed for audio decoder, ensure that stability and the clock transition problem of digital audio decoding process; (4) receive, decode and power amplification overall process employing digital audio processing, there is high anti-jamming capacity and high s/n ratio.
Accompanying drawing explanation
Fig. 1 is a kind of structured flowchart of the present utility model;
Fig. 2 is a kind of audio stream media receiver cellular construction block diagram of the present utility model;
Fig. 3 is a kind of real-time audio Streaming Media decoding unit structured flowchart of the present utility model;
Fig. 4 is a kind of digital audio clock forming circuit of the present utility model;
Fig. 5 is a kind of digital power amplifying circuit structured flowchart of the present utility model;
Fig. 6 is a kind of digital power bass amplifying circuit of the present utility model;
Fig. 7 is one+5V power generation circuit of the present utility model;
Fig. 8 is other power circuit of one of the present utility model and reset circuit figure;
Fig. 9 is a kind of button of the present utility model and LED indicating circuit figure;
In figure: 100, audio stream media receiver unit, 101, flush bonding processor, 102, plate carries antenna, 103, firmware memory, 104, DDR dynamic memory, 105, USB interface, 106, GPIO interface, 107, power interface, 108, JTAG debug port, 200, real-time audio Streaming Media decoding unit, 201, decoding processor, 202, USB interface, 203, audio clock generative circuit, 204, I2S interface, 205, I2C interface, 300, digital audio power amplifying unit, 301 and 302, digital audio power amplification chip, 303, I2C control interface, 304, I2S audio interface, 305, left horn, 306, right horn, 307, bass horn, 400, power circuit, 500, user interface, 600 loudspeaker units.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: a kind of audio stream media play platform based on WIFI network of the present embodiment, as shown in Figure 1, be made up of six parts such as audio stream media receiver unit 100, real-time audio Streaming Media decoding unit 200, digital audio power amplifying unit 300, power circuit 400, user interface 500 and loudspeaker units 600.Under the software control of mobile phone A PP or server end, audio stream media receiver unit 100 receives the audio stream file of network terminal, and it is exported from USB port, real-time audio Streaming Media decoding unit 200 receives the audio stream of USB port, different decoding algorithms is called according to different coded formats, audio stream media conversion is become pcm audio data and sends by I2S form, digital audio power amplifying unit 300 converts I2S digital audio to pwm pulse power waveform, and the audio frequency access loudspeaker unit 500 after power amplification promotes loud speaker sounding.Power circuit 400 provides the DC power supply needed for each unit, and user interface 500 simply plays the instruction of Process flowchart and broadcast state for equipment end.
As shown in Figure 2,101 is flush bonding processors to audio stream media receiver unit, and 102 is that plate carries antenna, and the WIFI signal that antenna receives is amplified by the wide-band amplifier of MT7620A inside.103 is firmware memories of SPI interface, deposits processor firmware, and after powering on, program is called in DDR dynamic memory 104 and run.Processor application software is based on uclinx operating system, the digital audio-frequency data Packet analyzing that network reception is arrived, extract audio data stream, and export from USB port 105, user interface circuit is controlled by GPIO interface 106, power interface 107 provides+3.3V needed for this PCB module and+1.8V DC power supply, and JTAG debug port 108 provides online software debugging.
Real-time audio Streaming Media decoding unit as shown in Figure 3,201 is decoding processor STM32F407, its firmware leaves inner FLASH in, audio data stream inputs from USB interface 202, audio clock generative circuit 203 provides master clock, shift clock and frame/sampling clock needed for decoding, and after decoding, the voice data of I2S form gives digital audio power amplification chip 301 and 302 from I2S interface 204.Decoding processor controls audio clock by I2C interface 205 and produces circuit and digital audio power amplification circuit.
Digital audio clock forming circuit as shown in Figure 4, decoding processor 201 is by the parameter of the inner PLL phase lock circuitry of I2C Interface Controller clock generating chip U1, produce the frame clock of 32KHZ, 44.1KHZ, 48KHZ etc., and the clock of the shift clock of 64 times of frame clocks and 512 times of frame clocks, U2 is the active crystal oscillator clock source of 27MHZ.
Digital power amplifying circuit as shown in Figure 5,301,302 is digital audio power amplification chips, its mode of operation is arranged by I2C control interface 303 by decoding processor 201, and digital audio clock and digital audio serial data deliver to 301 and 302 by 12S audio interface 304.Digital audio power amplification chip 301 exports two sound channels in left and right and promotes left horn 305 and right horn 306 respectively, and the bass that digital audio power amplification chip 302 exports 20 ~ 100HZ promotes heavy caliber bass horn 307.
Figure 6 shows that digital power amplification chip promotes the circuit diagram of bass horn.
As shown in Figure 7, the DC power supply input of 10 ~ 18V that external adapter provides, 3A, enters DC/DC conversion chip LM2596 and produces+5V/3A output after resettable fuse.
As shown in Figure 8 ,+5V is through DC/DC two-way conversion chip EA8122 Parallel opertation, and+3.3V DC power supply ,+3.3V produces+1.8V DC power supply through LDO chip LM1117.MAX809 produces the reset signal after powering on, for the reset of flush bonding processor and real-time audio decoding processor.
As shown in Figure 9, the superpower anti-interference touch IC(JR8004 of two panels 4 passage) detect 7 soft-touch control states, each switch makes backlight by a patch light-emitting diode.7 switches are connected with flush bonding processor by GPIO mouth 106, and switching function is play/suspend from left to right successively, and upper one is first, and next, a upper catalogue, next catalogue, for controlling broadcast state.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present utility model or surmount the scope that appended claims defines.
Although more employ the terms such as audio stream media decodes, power amplification, firmware herein, do not get rid of the possibility using other term.These terms are used to be only used to describe and explain essence of the present utility model more easily; The restriction that they are construed to any one additional is all contrary with the utility model spirit.
Claims (8)
1. the audio stream media play platform based on WIFI network, it is characterized in that, comprise audio stream media receiver unit, real-time audio Streaming Media decoding unit, digital audio power amplifying unit, loudspeaker unit, power circuit and user interface, the USB interface of described audio stream media receiver unit is connected to the input of digital audio power amplifying unit by real-time audio Streaming Media decoding unit, the output of described digital audio power amplifying unit connects loudspeaker unit, described power circuit is to audio stream media receiver unit, real-time audio Streaming Media decoding unit and digital audio power amplifying unit are powered, described user interface is connected to the GPIO interface of audio stream media receiver unit.
2. the audio stream media play platform based on WIFI network according to claim 1, it is characterized in that, described audio stream media receiver unit comprises flush bonding processor, DDR dynamic memory, firmware memory and plate and carries antenna, described DDR dynamic memory, firmware memory and plate carry antenna and are all connected to flush bonding processor, and described flush bonding processor is connected to real-time audio Streaming Media decoding unit by USB interface.
3. the audio stream media play platform based on WIFI network according to claim 2, is characterized in that, the W9751G6JB-25 of described flush bonding processor to be MT7620A, DDR dynamic memory be 512M, firmware memory is MX25L6406E.
4. the audio stream media play platform based on WIFI network according to claim 1, it is characterized in that, described real-time audio Streaming Media decoding unit comprises decoding processor and audio clock generative circuit, described audio clock generative circuit is connected to decoding processor, described decoding processor connects audio stream media receiver unit by USB interface, decoding processor connects digital audio power amplification unit by I2S interface, and decoding processor also connects digital audio power amplification unit by I2C interface and audio clock produces circuit.
5. the audio stream media play platform based on WIFI network according to claim 4, it is characterized in that, described decoding processor is STM32F407A.
6. the audio stream media play platform based on WIFI network according to claim 2 or 4, it is characterized in that, digital audio power amplifying unit comprises the first digital audio power amplification chip and the second digital audio power amplification chip, the input of two digital audio power amplifier chip all passes through I2S interface and connects real-time audio Streaming Media decoding unit, the control end of two digital audio power amplifier chip all passes through I2C interface and connects audio stream media decoding unit, the output of the first digital audio power amplification chip connects the left loudspeaker of loudspeaker unit and right loudspeaker, the output of the second digital audio power amplification chip connects the bass horn of loudspeaker unit.
7. the audio stream media play platform based on WIFI network according to claim 6, it is characterized in that, described digital audio power amplification chip is STA339BW.
8. the audio stream media play platform based on WIFI network according to claim 1, it is characterized in that, described user interface comprises two four-ways and touches chip and 7 soft-touch controls, first four-way touches chip and is connected with 4 soft-touch controls, second four-way touches chip and connects 3 soft-touch controls, is provided with a patch light-emitting diode below each soft-touch control.
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| CN201520791301.0U CN205029809U (en) | 2015-10-14 | 2015-10-14 | Audio stream media play platform based on WIFI network |
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| CN201520791301.0U CN205029809U (en) | 2015-10-14 | 2015-10-14 | Audio stream media play platform based on WIFI network |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190289391A1 (en) * | 2018-03-19 | 2019-09-19 | Shenzhen Grandsun Electronic Co., Ltd. | Audio signal processing device and sound box |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190289391A1 (en) * | 2018-03-19 | 2019-09-19 | Shenzhen Grandsun Electronic Co., Ltd. | Audio signal processing device and sound box |
| EP3544316A1 (en) * | 2018-03-19 | 2019-09-25 | Shenzhen Grandsun Electronic Co., Ltd. | Audio signal processing device and sound box |
| US10966019B2 (en) * | 2018-03-19 | 2021-03-30 | Shenzhen Grandsun Electronic Co., Ltd. | Audio signal processing device and sound box |
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Address after: 310052, Zhejiang, Hangzhou province Binjiang District Long River Street No. 399, No. 3, four, five floor Patentee after: Hangzhou grandwell Polytron Technologies Inc Address before: 310052, No. 3, building 399, building four, Qiu Yi Road, Binjiang District Changhe Road, Hangzhou, Zhejiang Patentee before: Hangzhou Linker Digital Technology Co., Ltd. |