CN201788701U - Portable audio player - Google Patents
Portable audio player Download PDFInfo
- Publication number
- CN201788701U CN201788701U CN2010205009014U CN201020500901U CN201788701U CN 201788701 U CN201788701 U CN 201788701U CN 2010205009014 U CN2010205009014 U CN 2010205009014U CN 201020500901 U CN201020500901 U CN 201020500901U CN 201788701 U CN201788701 U CN 201788701U
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- CN
- China
- Prior art keywords
- audio player
- portable audio
- amplifier
- microprocessor
- loudspeaker
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a portable audio player, which particularly comprises a microprocessor, a decoder, a filter, an amplifier and a loudspeaker. The microprocessor is connected with the decoder and the amplifier; the decoder is connected with the filter; the filter is connected with the amplifier; and the amplifier is connected with the loudspeaker. The microprocessor rectifies and outputs inputted current signals and transmits audio data to the decoder; the decoder decodes the audio data into audio signals and transmits the audio signals to the filter; the filter transmits the audio signals to the amplifier after filtering the audio signals; and the amplifier transmits the filtered audio signals to the loudspeaker for playing after amplifying the filtered audio signals. Accordingly, the microprocessor of the portable audio player can rectify the inputted current signals, so that the amplifier can not generate noise because of noise wave of the current signals. As the filter is used for filtering unnecessary high-frequency and low-frequency audio signals, sound outputted by the loudspeaker is better in quality.
Description
Technical field
The utility model relates to a kind of portable audio player, relates in particular to the good portable audio player of a kind of tonequality.
Background technology
Along with development of times, more and more increased music element in people's the life, music is seen everywhere, and makes people's life more and more be unable to do without music.
And the modern pursues portability, given birth to a lot of portable audio players so use.But existing portable audio player is because self limitation, thereby caused more and more can't satisfying the music tonequality requirement that people improve day by day.
Existing portable audio player, especially use the audio player of diameter in 50mm and following size, loudspeaker is bad with cooperating of input audio frequency, thereby makes loudspeaker in bass and high pitch partial response deficiency, causes that voice output is stiff can't reduce fully.
And existing portable audio player directly is transferred to power amplifier because the power supply clutter is more, and then enters loudspeaker when using power supply of UAB port or power supply adaptor power supply, makes that loudspeaker output noise is serious.
The utility model content
The purpose of this utility model is at the defective of existing portable audio player, and a kind of portable audio player is provided, and can carry out Filtering Processing to sound signal, and eliminates the noise that the power supply clutter produces, and makes result of broadcast good.
To achieve these goals, the utility model provides a kind of portable audio player, and described portable audio player specifically comprises: microprocessor, demoder, wave filter, amplifier and loudspeaker;
Described microprocessor is connected with described amplifier with described demoder, and described demoder is connected with described wave filter, and described wave filter is connected with described amplifier, and described amplifier is connected with described loudspeaker;
Described microprocessor carries out rectification processing and output with the current signal of input, and voice data is sent to described demoder; Described demoder is decoded as sound signal with described voice data and sends to described wave filter; Described wave filter sends to described amplifier after with described sound signal Filtering Processing; Described amplifier sends to described loudspeaker plays after described filtered audio signal is amplified.
Described wave filter is a bandpass filter.Described bandpass filter comprises two high pass filter unit.Described portable audio player also comprises USB interface, is connected with described microprocessor.Described portable audio player also comprises operation push-button, is connected with described microprocessor.Described portable audio player also comprises flash memory, is connected with described microprocessor.Described portable audio player also comprises the draw-in groove interface, is connected with described microprocessor.
Therefore portable audio player of the present utility model has following advantage:
1, because microprocessor can carry out rectification to the current signal of input, so amplifier can not produce noise owing to the clutter of current signal;
2,, thereby make that the tonequality of loudspeaker output is better owing to used the sound signal of the unnecessary high and low frequency of wave filter filtering.
Description of drawings
Fig. 1 is one of synoptic diagram of the utility model portable audio player;
Fig. 2 is the circuit diagram of the wave filter of the utility model portable audio player;
Fig. 3 be the utility model portable audio player synoptic diagram two.
Embodiment
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Fig. 1 is one of synoptic diagram of the utility model portable audio player, and as shown in the figure, described portable audio player specifically comprises: microprocessor 1, demoder 2, wave filter 3, amplifier 4 and loudspeaker 5.
Because small-bore loudspeaker are lower in the sensitivity of bass part,, will can not get effect preferably if the signal of bass part still is added to output on the loudspeaker 5.There is similar problem equally in part to high pitch simultaneously.But existing portable audio player does not have Filtering Processing, and portable audio player of the present utility model has wave filter 3, can form by two high pass filter unit, promptly seal in the RC Hi-pass filter, add RC Hi-pass filter composition bandpass filtering simultaneously over the ground and make tonequality effectively be promoted at amplifier 4 front ends.
Fig. 2 is the circuit diagram of the wave filter of the utility model portable audio player, as shown in the figure, uses
Formula calculate the frequency that will eliminate, adjust the value of R1, C1, R2, C2, can control the frequency range of the signal that arrives amplifier 4 input ends, and low frequency is
High frequency is
Fig. 3 is one of synoptic diagram of the utility model portable audio player, as shown in the figure, described portable audio player specifically comprises: microprocessor 1, demoder 2, wave filter 3, amplifier 4, loudspeaker 5, USB interface 6, operation push-button 7, flash memory 8 and draw-in groove interface 9.
USB interface 6, operation push-button 7, flash memory 8 and draw-in groove interface 9 all are connected with microprocessor 1.
USB interface 6 can be set up data transmission with the corresponding interface of external unit, and the voice data or the current signal of external unit sent to microprocessor 1.And after the user does operation push-button 7 behaviour, microprocessor 1 is received operational order.And can store some erasable or not erasable data in the flash memory 8, and can read voice data in the flash memory 8 by microprocessor 1, send to demoder 2 and decode.
And draw-in groove interface 9 can be various external memory cards, and the interface of TF card or SD card for example can read data in these storage cards by microprocessor 1.
During concrete work, read the voice data (for example can the built-in one section startup music or the advertising slogan of starting shooting) of flash memory 8 stored when start back plug-in control microprocessor 1, send to demoder 2 and carry out decoding processing, after wave filter 3 filtering, be amplified in loudspeaker 5 by amplifier 4 and play.
And if during by externally fed, for example utilize USB interface 6 to power by outer computer or power supply adaptor, influence tonequality thereby be easy to carry clutter in these electric currents, microprocessor 1 can carry out these current signals rectification to be handled, clutter is removed, thereby guarantee tonequality.
During concrete playing back music, microprocessor 1 may read the audio-frequency information of external unit by USB interface 6, perhaps read the audio-frequency information of storage card stored by draw-in groove interface 9, also may be the audio-frequency information that directly reads the flash memory stored, sending to demoder 2 then, to carry out decoding processing be sound signal.
Demoder 2 sends to sound signal wave filter 3 again and carries out bandpass filtering, sends to amplifier 4 behind the high and low frequency target signal filter with unnecessary audio amplifier tonequality, amplifies the back by amplifier 4 and plays at loudspeaker 5.
So portable audio player of the present utility model can be to the microprocessor of current signal shaping because have, so can not produce noise because of the clutter of foreign current signal, and because wave filter can carry out bandpass filtering to sound signal, thereby filtering some are unnecessary and may influence the high and low frequency signal of tonequality, make that the sound tonequality of loudspeaker plays is better.
It should be noted last that, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not break away from the spirit and scope of technical solutions of the utility model.
Claims (7)
1. a portable audio player is characterized in that, described portable audio player specifically comprises: microprocessor, demoder, wave filter, amplifier and loudspeaker;
Described microprocessor is connected with described amplifier with described demoder, and described demoder is connected with described wave filter, and described wave filter is connected with described amplifier, and described amplifier is connected with described loudspeaker;
Described microprocessor carries out rectification processing and output with the current signal of input, and voice data is sent to described demoder; Described demoder is decoded as sound signal with described voice data and sends to described wave filter; Described wave filter sends to described amplifier after with described sound signal Filtering Processing; Described amplifier sends to described loudspeaker plays after described filtered audio signal is amplified.
2. portable audio player according to claim 1 is characterized in that, described wave filter is a bandpass filter.
3. portable audio player according to claim 2 is characterized in that, described bandpass filter comprises two high pass filter unit.
4. portable audio player according to claim 1 is characterized in that described portable audio player also comprises USB interface, is connected with described microprocessor.
5. portable audio player according to claim 1 is characterized in that described portable audio player also comprises operation push-button, is connected with described microprocessor.
6. portable audio player according to claim 1 is characterized in that described portable audio player also comprises flash memory, is connected with described microprocessor.
7. portable audio player according to claim 1 is characterized in that described portable audio player also comprises the draw-in groove interface, is connected with described microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205009014U CN201788701U (en) | 2010-08-23 | 2010-08-23 | Portable audio player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205009014U CN201788701U (en) | 2010-08-23 | 2010-08-23 | Portable audio player |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201788701U true CN201788701U (en) | 2011-04-06 |
Family
ID=43820658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205009014U Expired - Fee Related CN201788701U (en) | 2010-08-23 | 2010-08-23 | Portable audio player |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201788701U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104168000A (en) * | 2013-05-20 | 2014-11-26 | 深圳富泰宏精密工业有限公司 | Audio processing system and method |
| CN107465975A (en) * | 2017-07-12 | 2017-12-12 | 成都驰通数码系统有限公司 | A kind of apparatus and method that tuner is controlled by vehicle-carrying music player |
-
2010
- 2010-08-23 CN CN2010205009014U patent/CN201788701U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104168000A (en) * | 2013-05-20 | 2014-11-26 | 深圳富泰宏精密工业有限公司 | Audio processing system and method |
| CN107465975A (en) * | 2017-07-12 | 2017-12-12 | 成都驰通数码系统有限公司 | A kind of apparatus and method that tuner is controlled by vehicle-carrying music player |
| CN107465975B (en) * | 2017-07-12 | 2020-01-31 | 成都驰通数码系统有限公司 | method for controlling tuner by vehicle-mounted music player |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110406 Termination date: 20120823 |