CN208061183U - A kind of mobile phone back splint HIFI systems - Google Patents
A kind of mobile phone back splint HIFI systems Download PDFInfo
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- CN208061183U CN208061183U CN201820654149.5U CN201820654149U CN208061183U CN 208061183 U CN208061183 U CN 208061183U CN 201820654149 U CN201820654149 U CN 201820654149U CN 208061183 U CN208061183 U CN 208061183U
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Abstract
The utility model provides a kind of mobile phone back splint HIFI systems, including：Audio reads interface, for acquiring the digital audio and video signals in mobile phone by handset port；Audio converter reads interface with audio and connect, for digital audio and video signals to be converted into pcm audio signal and/or DSD audio signals；Digital analog converter is connect with audio converter, for pcm audio signal and/or DSD audio signals to be converted into analog signal；Audio-frequency amplifier is connect with digital analog converter, for amplifying analog signal；Audio player is connect with audio-frequency amplifier, for amplified analog signal to be converted to acoustical signal；Power module is electrically connected with audio converter, digital analog converter and audio-frequency amplifier, is audio converter, digital analog converter and audio-frequency amplifier power supply.Mobile phone back splint HIFI systems provided by the utility model carry HIFI functions, can improve audio playback quality and the continuation of the journey of mobile phone.
Description
Technical field
The utility model is related to technical field of acoustics, more particularly to a kind of mobile phone back splint HIFI systems.
Background technology
Currently, mobile phone is as portable entertainment terminal, it is one of basic function to appreciate music, and iphone is listed as market
One of field maximum mobile phone of occupation rate, used audio decoder and amplifier can not meet HIFI (High-
Fidelity, high-fidelity) sound quality requirement.
There is the earphone for adapting to apple Lightning interfaces on the market, but since earphone is without decoder, has been more
In order in mobile phone music player and mobile call design, be extremely difficult to the standard of HIFI sound quality.
Invention content
The utility model provides a kind of mobile phone back splint HIFI systems, carries HIFI functions, and the audio that can improve mobile phone is broadcast
Put quality.
A kind of mobile phone back splint HIFI systems that the utility model embodiment provides, including：
Audio reads interface, for acquiring the digital audio and video signals in mobile phone by handset port；
Audio converter reads interface with the audio and connect, for the digital audio and video signals to be converted into pcm audio
Signal and/or DSD audio signals；
Digital analog converter is connect with the audio converter, is used for the pcm audio signal and/or DSD audio signals
It is converted into analog signal；
Audio-frequency amplifier is connect with the digital analog converter, for amplifying the analog signal；
Audio player is connect with the audio-frequency amplifier, for the amplified analog signal to be converted to sound letter
Number；
Power module is electrically connected with the audio converter, digital analog converter and audio-frequency amplifier, is converted for the audio
Device, digital analog converter and audio-frequency amplifier power supply.
Preferably, it is LIGHTNING interfaces that audio, which reads interface,.
In one embodiment, audio player is loud speaker and/or the earphone equipped with earphone interface；The earphone interface
For 2.5mm/3.5mm earphone interfaces.
Preferably, power module is additionally operable to provide electric energy by handset port for mobile phone.
Preferably, digital analog converter is the DAC chip of voltage output.
The crystal oscillator of digital analog converter uses 45.1584MHz or 49.1520MHz.
Preferably, audio-frequency amplifier includes：Low-pass filter, subtracter and amplifier；
The digital analog converter passes sequentially through the low-pass filter, subtracter, amplifier and the audio player phase
Even.
Preferably, mobile phone back splint HIFI systems further include charging interface, and the charging interface is connect with the power module,
It is the power module electric energy supplement for connecting external power supply.
Other features and advantages of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood by implementing the utility model.The purpose of this utility model and other advantages can pass through
Specifically noted structure is realized and is obtained in the specification, claims and attached drawing write.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Description of the drawings
Attached drawing is used to provide a further understanding of the present invention, and a part for constitution instruction, with this practicality
Novel embodiment for explaining the utility model, does not constitute limitations of the present invention together.In the accompanying drawings：
Fig. 1 is a kind of schematic diagram of mobile phone back splint HIFI systems in the utility model embodiment.
Specific implementation mode
The preferred embodiment of the utility model is illustrated below in conjunction with attached drawing, it should be understood that described herein excellent
It selects embodiment to be only used for describing and explaining the present invention, is not used to limit the utility model.
The utility model embodiment provides a kind of mobile phone back splint HIFI systems, as shown in Figure 1, including：
Audio reads interface 11, for acquiring the digital audio and video signals in mobile phone by handset port；
Audio converter 12 reads interface 11 with audio and connect, for digital audio and video signals to be converted into PCM (Pulse
Code Modulation, pulse code modulation) audio signal and/or DSD (Direct Stream Digital, direct bit
Streaming digital encodes) audio signal；
Digital analog converter 13 is connect with audio converter 12, for converting pcm audio signal and/or DSD audio signals
At analog signal；
Audio-frequency amplifier 14 is connect with digital analog converter 13, for amplifying analog signal；
Audio player 15 is connect with audio-frequency amplifier 14, for amplified analog signal to be converted to acoustical signal；
Power module 16 is electrically connected with audio converter 12, digital analog converter 13 and audio-frequency amplifier 14, is converted for audio
Device 12, digital analog converter 13 and audio-frequency amplifier 14 are powered.
The course of work of the mobile phone back splint HIFI systems is specific as follows：Digital audio and video signals read interface 11 by audio and enter
Audio converter 12 is converted to pcm audio signal and/or DSD audio signals, and analog signal is being converted to through digital analog converter 13,
Most amplify afterwards through audio-frequency amplifier 14, is finally played by audio player 15.Mobile phone back splint HIFI systems can will be in mobile phone
Digital audio and video signals be converted to signal and the broadcasting of high tone quality, so as to improve the audio playback quality of mobile phone.
Above-mentioned mobile phone back splint HIFI systems are set to the mobile phone back side, and wrap up mobile phone circumferential side frame, can be provided for mobile phone
Protection.
To adapt to iphone mobile phones, it is preferred that it is LIGHTNING interfaces that audio, which reads interface 11,.
In one embodiment, audio player 15 is loud speaker and/or the earphone equipped with earphone interface；
Earphone interface is 2.5mm/3.5mm earphone interfaces.
To increase the cruising ability of mobile phone, it is preferred that power module is additionally operable to provide electric energy by handset port for mobile phone.
The utility model advantage is to take electricity not from mobile phone, and the power supply that power module provides ripple down to 10 μ V is given to audio converter,
Conversion accuracy is greatly improved.The audio stream of audio stream and mobile phone terminal uses asynchronous mode, sound caused by other operations of isolation mobile phone
Frequency is shaken, and avoids influencing sound quality.It avoids just producing distortion in source in audio data, the sound of distortion can lead to original height
Sound field is deteriorated when quality plays, and the crude sense of high frequency increases.The utility model is just evaded into line distortion in audio stream source.
To reduce external distortion sound equipment, it is preferred that digital analog converter is DAC (the Digital to analog of voltage output
Converter, digital analog converter) chip.It is exported using electric current compared with DAC, the DAC chip voltage output of use is not necessarily to I/V
Conversion, reduces external distortion effect.
The crystal oscillator of digital analog converter 13 uses 45.1584MHz or 49.1520MHz.Digital analog converter is converted into analog signal
When need high-precision clock that could perfectly restore original analog, so crystal oscillator is affected to sound quality.The present embodiment
Middle crystal oscillator uses 45.1584MHz, 49.1520MHz professional audio application crystal oscillator；Amateur clock such as 12M standards crystal oscillator due to
44.1KHz is not integral multiple relation, can not regain accurate 44.1K clocks by frequency dividing and be solved to DAC (digital analog converter)
Code and generate jitter time base flutters, jitter can allow DAC that can not correctly convert digital signals into corresponding analog signal,
To generate distortion, the sound quality of the ordinary audio of the 44.1KHz sample rates played at this time can be deteriorated.The present embodiment is using profession
Voice applications crystal oscillator and frequency dividing device, can utmostly reduce Jitter, so as to improve sound quality.
Preferably, audio-frequency amplifier 14 includes：Low-pass filter, subtracter and amplifier；Digital analog converter 13 leads to successively
Low-pass filter, subtracter, amplifier is crossed with audio player 15 to be connected.Subtracter part is increased, non-audio can be believed
Number distorted signal eliminated by subtracter, keep echo signal purer.
In order to give power module 16 electric energy supplement, it is preferred that mobile phone back splint HIFI systems further include charging interface, charging
Mouth is connect with power module, is power module electric energy supplement for connecting external power supply.
Obviously, those skilled in the art can carry out the utility model various modification and variations without departing from this practicality
Novel spirit and scope.If in this way, these modifications and variations of the present invention belong to the utility model claims and
Within the scope of its equivalent technologies, then the utility model is also intended to include these modifications and variations.
Claims (8)
1. a kind of mobile phone back splint HIFI systems, which is characterized in that including：
Audio reads interface, for acquiring the digital audio and video signals in mobile phone by handset port；
Audio converter reads interface with the audio and connect, for the digital audio and video signals to be converted into pcm audio signal
And/or DSD audio signals；
Digital analog converter is connect with the audio converter, for converting the pcm audio signal and/or DSD audio signals
At analog signal；
Audio-frequency amplifier is connect with the digital analog converter, for amplifying the analog signal；
Audio player is connect with the audio-frequency amplifier, for the amplified analog signal to be converted to acoustical signal；
Power module is electrically connected with the audio converter, digital analog converter and audio-frequency amplifier, be the audio converter,
Digital analog converter and audio-frequency amplifier power supply.
2. mobile phone back splint HIFI systems as described in claim 1, which is characterized in that the audio reads interface and is
LIGHTNING interfaces.
3. mobile phone back splint HIFI systems as described in claim 1, which is characterized in that the audio player be loud speaker and/
Or the earphone equipped with earphone interface；
The earphone interface is 2.5mm/3.5mm earphone interfaces.
4. mobile phone back splint HIFI systems as described in claim 1, which is characterized in that the power module is additionally operable to pass through mobile phone
Interface provides electric energy for mobile phone.
5. mobile phone back splint HIFI systems as described in claim 1, which is characterized in that the digital analog converter is voltage output
DAC chip.
6. mobile phone back splint HIFI systems as claimed in claim 5, which is characterized in that the crystal oscillator of the digital analog converter uses
45.1584MHz or 49.1520MHz.
7. mobile phone back splint HIFI systems as described in claim 1, which is characterized in that the audio-frequency amplifier includes：Low pass filtered
Wave device, subtracter and amplifier；
The digital analog converter passes sequentially through the low-pass filter, subtracter, amplifier and is connected with the audio player.
8. mobile phone back splint HIFI systems as described in claim 1, which is characterized in that the system also includes charging interface, institutes
It states charging interface to connect with the power module, is the power module electric energy supplement for connecting external power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820654149.5U CN208061183U (en) | 2018-05-03 | 2018-05-03 | A kind of mobile phone back splint HIFI systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820654149.5U CN208061183U (en) | 2018-05-03 | 2018-05-03 | A kind of mobile phone back splint HIFI systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208061183U true CN208061183U (en) | 2018-11-06 |
Family
ID=63984155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820654149.5U Active CN208061183U (en) | 2018-05-03 | 2018-05-03 | A kind of mobile phone back splint HIFI systems |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208061183U (en) |
-
2018
- 2018-05-03 CN CN201820654149.5U patent/CN208061183U/en active Active
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Address after: Floor 8, Dongzhi (14A) Building, Taihua wutong Industrial Park, Sanwei Community, Hangcheng Street, Bao'an District, Shenzhen, Guangdong 518000 Patentee after: SHENZHEN AIKEYIN AUDIO TECHNOLOGY Co.,Ltd. Address before: 518000 501, Annex Building, Guanlida Building, No. 267, Qianjin 1st Road, Wenhui Community, Xin'an Street, Bao'an District, Shenzhen, Guangdong Patentee before: SHENZHEN AIKEYIN AUDIO TECHNOLOGY Co.,Ltd. |