CN2759090Y - Loudspeaker box device - Google Patents
Loudspeaker box device Download PDFInfo
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- CN2759090Y CN2759090Y CN 200420058513 CN200420058513U CN2759090Y CN 2759090 Y CN2759090 Y CN 2759090Y CN 200420058513 CN200420058513 CN 200420058513 CN 200420058513 U CN200420058513 U CN 200420058513U CN 2759090 Y CN2759090 Y CN 2759090Y
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Abstract
The utility model discloses a loudspeaker box device comprising an external analog audio signal input unit, an audio processing and power amplification unit, a sound channel unit and a power supply unit. The utility model also comprises a digital audio file input unit, a digital audio file decoding unit, a digital-analog converting unit and a signal switchover control unit. On the basis of the existing loudspeaker boxes, the utility model can be added with digital circuits; thereby, not only is the loudspeaker box matched with a PC, a DVD/VCD, etc. to carry out playing analog audio signals, but also the loudspeaker box can directly read the digital audio files of MP3 format and other formats to carry out playing independently, wherein the audio files of MP3 format and other formats are in users' flash memory disks, memory cards and other mobile storage devices. Further, a user can carry out selective play through keys and remote control, and timing self-starting play can also be carried out; digital audio files in flash memory disks and memory cards can be arbitrarily increased and deleted, and various functions of playing digital or analog audio signals are offered.
Description
Technical field
The utility model relates to loudspeaker box device, relates in particular to a kind of multi-functional loudspeaker box device.
Background technology
At present, along with the fast development of digital industry, liked by many users based on the song of forms such as MP3 (Moving Picture Experts Group, Audio Layer III).All the time, the user listens to various audio-frequency informations by modes such as earphone and audio amplifiers, and therefore various Hi-Fi sound-boxes have obtained use, but audio amplifier is the supporting role of audio frequency apparatus and the role of peripheral hardware.Usually people use pc (personalcomputer, personal computer) machine and select the MP3 song, and are converted into the simulated audio signal (for example stereophony audio signal) that audio amplifier can be discerned, and by audio amplifier it are played out then.
Realize the broadcast of format audio signals such as MP3 in this way, audio amplifier must cooperate PC, DVD (Digital Video/Versatile Disk, digital video/use CD) or VCD (versatile disc more, video compact disk) could use, audio amplifier can not independently be realized the broadcast of audio signal.Need wait for one period available machine time during in addition, with the PC playing audio signal.Therefore, existing loudspeaker box device can not provide a kind of more convenient, succinct mode to realize the broadcast of audio signal.
The utility model content
The purpose of this utility model is to provide a kind of loudspeaker box device, with overcome existing audio amplifier can not independent play-out MP3 etc. the defective of digital audio and video signals of form.
For achieving the above object, the utility model provides a kind of loudspeaker box device, and this device comprises:
External analog audio signal input unit is used to receive first simulated audio signal from external equipment;
Audio Processing and power amplification unit, be used for to simulated audio signal be coupled, filtering and power amplification;
The sound channel unit is used for the simulated audio signal after the power amplification is play;
Power subsystem is used for said units is powered;
The digital audio file input unit is used for reading the digital audio file of memory device;
The digital audio file decoding unit, the input of digital audio file decoding unit links to each other with described digital audio file input unit, is used for the digital audio file that described digital audio file input unit sends is decoded, and generates digital audio and video signals;
Digital/analog converter, the input of digital/analog converter links to each other with the output of described digital audio file decoding unit, is used for decoded digital audio and video signals is converted to second simulated audio signal;
The signal switch control unit comprises a plurality of inputs and an output, and wherein two inputs connect the output of described digital/analog converter and described external analog audio signal input unit respectively; Described signal switch control unit is used to select the simulated audio signal of a selection input, and the simulated audio signal of selecting is sent to described Audio Processing and power amplification unit.
Described signal switch control unit comprises:
Audio signal judgement subelement according to the priority setting or the pressure switching command of a plurality of inputs, is exported one and is selected control signal;
The time-delay control unit receives the selection control signal from described audio signal judgement subelement, when this selects control signal effective, exports an audio frequency handover information;
Audio switch, receive described audio frequency handover information after, carry out the switching of audio signal output.
Also comprise a frequency modulation unit, the output of described frequency modulation unit links to each other with described signal switch control unit the 3rd input, is used to play radio broadcasting.
Comprise that is also read a signaling control unit, choose digital audio file that described digital audio file input unit reads, the output of described frequency modulation unit is controlled according to the information of external setting-up, and the pressure switching command of described switch control unit is controlled.
The described signaling control unit that reads comprises:
Infrared control unit and by key control unit, or infrared control unit and by one of key control unit;
Described infrared control unit receives outside bear control information infrared signal of sending, and through decoding, controlled information is controlled, the output of frequency modulation unit and the pressure switching command of switch control unit are controlled reading of digital audio file.
The described key control unit of pressing is controlled, the output of frequency modulation unit and the pressure switching command of switch control unit is controlled reading of digital audio file by the external key input control information.
The described signaling control unit that reads also comprises:
Display unit is used for described infrared control unit or the input option when working by key control unit shows and the input results demonstration.
Also comprise a clock unit, link to each other, be used to whole audio amplifier that clock information is provided, and play by described timing of reading signaling control unit realization digital audio and video signals or FM signal with the described signaling control unit that reads.
Described digital audio file comprises MP3 format or window media audio WMA form.
The memory device of described digital audio file comprises: flash memory, portable hard drive, mobile MP3 equipment and storage card.
Described storage card comprises: multimedia card MMC and safe digital card SD.
On the basis of existing audio amplifier, increase a part of digital circuit, make described audio amplifier can cooperate the pc machine, equipment such as DVD/VCD carry out the broadcast of simulated audio signal, can directly read the digital audio file independence of the forms such as MP3 of movable storage devices such as user's flash disk and storage card again, play.Further, the user can play selection by button and remote control; Time-lapse self-starting is play; And can increase arbitrarily and deletion flash disk and storage card digital audio file; Have the various functions that numeral or simulated audio signal are play.
Description of drawings
Fig. 1 is the basic circuit diagram of first embodiment of the utility model audio amplifier;
Fig. 2 is that the utility model audio amplifier sound intermediate frequency is handled and the power amplification unit structure chart;
Fig. 3 is a power subsystem structure chart in the utility model audio amplifier;
Fig. 4 is a signal switch control unit structure chart in the utility model audio amplifier;
Fig. 5 is the utility model audio amplifier sound intermediate frequency signal decision subelement circuit diagram;
Fig. 6 is a time-delay control sub unit circuit diagram in the utility model audio amplifier;
Fig. 7 is the circuit diagram of second embodiment of the utility model audio amplifier;
Fig. 8 is the circuit diagram of the 3rd embodiment of the utility model audio amplifier;
Fig. 9 is the circuit diagram of the 4th embodiment of the utility model audio amplifier.
Embodiment
Illustrate in conjunction with Fig. 1 and the basic circuit diagram of first embodiment of the utility model loudspeaker box device to comprise artificial circuit part 101 and digital circuit part 102 in this circuit.
Wherein artificial circuit part 101 is main parts of existing audio amplifier, comprises external analog audio frequency input unit 103, Audio Processing and power amplification unit 104, sound channel unit 105 and power subsystem 106.Its operation principle is: the simulated audio signal s1 that external analog audio frequency input unit 103 receives from outer audio equipments such as PC, DVD/VCD, for example: the stereophony audio signal; This simulated audio signal process external analog audio frequency input unit 103 enters Audio Processing and power amplification unit 104 carries out coupling, filtering and the power amplification of simulated audio signal; Simulated audio signal s4 through amplifying can directly drive sound channel unit 105, for example: the audio-signal-driven L channel loudspeaker of L channel, right-channel signals drives the R channel loudspeaker, and the supper bass signal then drives bass horn.
Wherein digital circuit part 102 is improvement parts of the utility model audio amplifier, comprise: digital audio file input unit 110, use the memory device of main frame (HOST) interface, as USB flash disk, MP3, portable hard drive, or based on the memory device of storage card, as MMC (MultiMediaCard, multimedia card), SD (Secure Digital Card, safe digital card), MS (Memory stick, memory stick), CF (CardFlash, compact flash cards) etc.; Digital audio file decoding unit 109 is decoded to the digital audio file of the forms such as MP3 in the various memory devices, generates digital audio and video signals; Digital audio and video signals generates simulated audio signal s2 through D (Data, numeral)/A (Analog, simulation) converting unit 108; Externally add signal switch control unit 107 between analogue audio frequency input unit and Audio Processing and the power amplification unit, described signal switch control unit 107 is used for the audio signal s1 and the s2 of input are selected, output s3.
The structure of Audio Processing among the utility model embodiment 1 and power amplification unit 104 comprises that signal processing subelement 201, volume control sub unit 202, audio power amplify subelement 203 as shown in Figure 2.Wherein the simulated audio signal s3 of 201 pairs of inputs of signal processing subelement is coupled and Filtering Processing, simulated audio signal after the processing is sent into audio power amplification subelement 202 and is carried out power amplification output, and the simulated audio signal of process power amplification can directly drive speaker and sound, after volume control sub unit 203 is connected on the power amplification subelement, can carry out suitable decay to the simulated audio signal after amplifying, reach the purpose of volume control.
The main effect of power subsystem 106 provides the required power supply supply of circuit at different levels among the utility model embodiment.Its structure such as Fig. 3: comprise AC transformer 301, rectifying and wave-filtering pressurizer 302 and secondary filtering pressurizer 303.Wherein AC transformer 301 is with input AC 220 civil powers (AC220V), transformation becomes double cross stream 17V (also can be the voltage of other scale values) here, rectifying and wave-filtering pressurizer 302 through export after the voltage stabilizings direct current-17v and+17v, be Audio Processing and power amplification unit power supply, simultaneously+17v is also as the input of the power supply of secondary filtering pressurizer 303, produce digital circuit required+5v and+voltages such as 3.3v.
Signal switch control unit structure such as Fig. 4 among the utility model embodiment 1: comprise that audio signal decision circuit subelement 401, time-delay control sub unit 402 and double-channel audio switch subelement 403.The simulated audio signal of two-way input judged and selects export, wherein audio signal decision circuit subelement is to s1, s2 judges, when the two-way simulated audio signal only has one tunnel input, this road simulated audio signal will be selected output automatically, when two-way input simulated audio signal is imported simultaneously, for example, PC is arranged simultaneously, when the simulated audio signal of audio frequency apparatuses such as DVD/VCD then passes through the simulated audio signal of decoding from digital audio file in the External memory equipment, signal decision circuit subelement 401 can be followed primary and secondary passage principle, with PC, the input of audio frequency such as DVD/VCD is made as the main channel, the memory device digital audio file is made as subchannel by the simulated audio signal input of decoding, under the default situation, the principle of switching can be followed the principle of main channel for elder generation, but also can accept external user and set the pressure switching principle: when the primary and secondary passage all had the signal input, which signal output the user can freely select.After the audio signal decision circuit subelement 401 output judgement control signals, also must wait for through the time-delay of time-delay control sub unit 402, and confirm that finally this control signal is a useful signal, just export to double-channel audio and switch the switching that subelement 403 carries out simulated audio signal output, finally finish signal switching controls and output services.
Wherein, audio signal judgement subelement is realized by comparator, operation principle such as Fig. 5: comparator 501+the termination reference voltage, this voltage can obtain required reference voltage level by electric resistance partial pressure, comparator-the termination reference voltage, suitable but lower slightly with reference voltage, audio signal also is coupled to an end of comparator by electric capacity 502 simultaneously, therefore when audio signal was imported, a terminal voltage of comparator can change, like this variation of the output of comparator from ' 1 ' to ' 0 '.Do not have simulated audio signal s1 or s2 input when being output as ' 1 ' interval scale, be input as ' 0 ' representative simulation audio signal s1 or s2 input when comparator.Be considered to the design, we can adopt the LM324 chip to realize, there are 4 road operational amplifiers inside, because the two-way audio signal is adjudicated, therefore only use 2 road operational amplifiers, notice that we are as amplifying but the state that is used for comparator is realized the judgement to audio signal.
Time-delay control sub unit 402 plays the effect of delay confirmation to the result ' 1 ' or ' 0 ' of audio signal judgement subelement output, and it is disconnected to guarantee erroneous judgement not occur, can adopt 555 timers to realize.In order to simplify circuit and to save cost, also can adopt diode, resistance, electrochemical capacitor is realized, as Fig. 6: the output of audio signal judgement subelement connects diode 601, resistance 602 and electrochemical capacitor 603 also connect, the negative terminal of one terminating diode, an end ground connection is when the output ' 1 ' of comparator, electrochemical capacitor 603 is in charged state, when the switch-over control signal of the output of comparator was ' 0 ', diode 601 was in cut-off state, and electrochemical capacitor 603 is in discharge condition, electrochemical capacitor level maintenances of can delaying time simultaneously, the time of maintenance can realize by adjusting electrochemical capacitor appearance value and resistance value.Adopt 4148 type diodes, resistance adopts with 510k, and capacitor's capacity is 100U, and time-delay can reach more than 1 second to level ground like this.
Double-channel audio switches subelement 403, when receiving switching signal, can realize the selection output between the two paths of signals.Can adopt the two-way relay to realize, also can adopt the CD4052 chip to realize, this circuit adopts the CD4052 chip, can realize the switching of two 4 tunnel audio signals, and the design only gets final product with two two paths of signals.
Digital audio file decoding unit 109 and digital audio file input unit 110 are cores of the utility model audio amplifier digital circuit part, finish digital audio file, decoding as the MP3 format file, convert digital audio file to digital audio and video signals, and export digital/analog converter to.MP3 defers to the Standard File Format of MPEG 2 LAYER 3 at present, USB in the digital audio file input unit 110 (Universal Serial Bus, USB) from External memory equipment, reads the MP3 format file, and convert MPEG2 (Motion Picture Experts Group's Standard Edition 2) audio stream SDO (output of Serial DataOut serial data) to and output to the digital audio file decoding unit, this unit is to adopt DSP (Digital Signal Processing/Processor Digital Signal Processing) kernel to realize the arithmetic analysis of MP3 audio stream, converts the I2S audio data stream to.Digital audio file input unit 110 is according to the form of various digital audio files by file header sign determination number word audio file, initiatively seek digital audio file, as MP3, WMA (Windows Media Audio, the window media audio) audio file of form tabulation such as is used corresponding algorithm to the audio file of different-format and is realized decoding.When the user plays the digital audio file of MP3 format, adopt the OTI6888 chip to read the MP3 format file and convert MPEG2 audio stream SDO to and export, and carry out MP3 decoding.Wherein the OTI6888 chip is a USB host functional chip, defers to the USB1.1 standard, supports the access function to equipment such as USB flash disk and USB storages, and when equipment such as USB flash disk were access in, the OTI6888 chip carried out device enumeration, obtains facility informations such as USB flash disk.
Second embodiment of the present utility model, as shown in Figure 7:
In the digital circuit part 102 of first embodiment, add one and read signaling control unit 111, the described signaling control unit 111 that reads is controlled the digital audio file that described digital audio file input unit 110 reads, and mainly comprises Infrared remote controller, button controller and LCD.Described infrared control unit receives outside bear control information infrared signal of sending, and through decoding, controlled information is controlled reading of digital audio file.The described key control unit of pressing is controlled reading of digital audio file by the external key input control information.Described display unit is used for described infrared control unit or the input option when working by key control unit shows and the input results demonstration.Wherein Infrared remote controller comprises following several button: ON/OFF, and volume+, volume-, last first, following first, broadcast/time-out, menu, the 0-9 numeral is set in cancellation, 3 keep keys in addition, and wherein menu comprises the MP3 function, frequency modulation function, and clock setting such as regularly is provided with at function.Button controller is as auxiliary input, so voice box casing only has ON/OFF, volume+, volume-, last first, following first, 6 buttons of broadcast/time-out are based on realization MP3 broadcast.Infrared remote control and all can be used as user's setting and configuration input by key control infraredly can carry out remote control and uses in 10 meters, directly MP3 operation broadcast liquid crystal display of button is equipped with, to be useful for different scenes.Liquid crystal display simultaneously can also show temporal information, information such as FM channel and lyrics demonstration.
The 3rd embodiment of the present utility model, as shown in Figure 8:
In digital circuit part 102 of the present utility model, add frequency modulation unit 112, described frequency modulation unit is used to play radio broadcasting, and determines the simulated audio signal s2 or the FM signal s5 of digital audio file conversion are sent to described signal switch control unit 107 by the described signaling control unit that reads.Frequency modulation unit 112 realizes the function of audio amplifier broadcast broadcasting, can adopt the TEA5767HL chip of PHILIPS Co. to realize; Can control described frequency modulation unit by reading signaling control unit 111, for example, by 3 line bus (Writing/Reading, clock, data) the TEA5767HL chip is set, TEA5767HL can realize automatic channel search, channel selection according to setting, functions such as demodulation are also directly exported the audio signal of broadcasting, and the audio power that provides by audio amplifier amplifies directly broadcast of back.
The 4th embodiment of the present utility model, as shown in Figure 9:
Can also add clock unit 113 in digital circuit part 102 of the present utility model, described clock unit provides clock information for whole audio amplifier, and plays by described timing of reading signaling control unit realization digital audio and video signals or FM signal.Clock unit 113 also has reserve battery except the power supply supply power mode, as the effect of power down protection, clock unit 113 major functions are to realize regularly starting playing/stop the function of song or broadcasting.Wherein the circuit of clock unit can adopt the real-time timepiece chip PCF8563 chip of PHILIPS Co. to realize, this chips adopts the little encapsulation of 8pin, the setting of exterior I 2C interface control to internal clocking is provided, also can set timing function, when the time that runs to setting, the PCF8563 chip can produce middle-end, reads audio file control unit 111 and detects interrupt signal, can start broadcast/shut-down operation.
The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (10)
1, a kind of loudspeaker box device, this device comprises:
External analog audio signal input unit is used to receive first simulated audio signal from external equipment;
Audio Processing and power amplification unit, be used for to simulated audio signal be coupled, filtering and power amplification;
The sound channel unit is used for the simulated audio signal after the power amplification is play;
Power subsystem is used for said units is powered;
It is characterized in that, also comprise:
The digital audio file input unit is used for reading the digital audio file of memory device;
The digital audio file decoding unit, the input of digital audio file decoding unit links to each other with described digital audio file input unit, is used for the digital audio file that described digital audio file input unit sends is decoded, and generates digital audio and video signals;
Digital/analog converter, the input of digital/analog converter links to each other with the output of described digital audio file decoding unit, is used for decoded digital audio and video signals is converted to second simulated audio signal;
The signal switch control unit comprises a plurality of inputs and an output, and wherein two inputs connect the output of described digital/analog converter and described external analog audio signal input unit respectively; Described signal switch control unit is used to select the simulated audio signal of a selection input, and the simulated audio signal of selecting is sent to described Audio Processing and power amplification unit.
2, loudspeaker box device according to claim 1 is characterized in that described signal switch control unit comprises:
Audio signal judgement subelement according to the priority setting or the pressure switching command of a plurality of inputs, is exported one and is selected control signal;
The time-delay control unit receives the selection control signal from described audio signal judgement subelement, when this selects control signal effective, exports an audio frequency handover information;
Audio switch, receive described audio frequency handover information after, carry out the switching of audio signal output.
3, as loudspeaker box device as described in the claim 2, it is characterized in that: also comprise a frequency modulation unit, the output of described frequency modulation unit links to each other with described signal switch control unit the 3rd input, is used to play radio broadcasting.
4, as loudspeaker box device as described in the claim 3, it is characterized in that: comprise that is also read a signaling control unit, choose digital audio file that described digital audio file input unit reads, the output of described frequency modulation unit is controlled according to the information of external setting-up, and the pressure switching command of described switch control unit is controlled.
5, as loudspeaker box device as described in the claim 4, it is characterized in that the described signaling control unit that reads comprises:
Infrared control unit and by key control unit, or infrared control unit and by one of key control unit;
Described infrared control unit receives outside bear control information infrared signal of sending, and through decoding, controlled information is controlled, the output of frequency modulation unit and the pressure switching command of switch control unit are controlled reading of digital audio file.
The described key control unit of pressing is controlled, the output of frequency modulation unit and the pressure switching command of switch control unit is controlled reading of digital audio file by the external key input control information.
6, as loudspeaker box device as described in the claim 5, it is characterized in that the described signaling control unit that reads also comprises:
Display unit is used for described infrared control unit or the input option when working by key control unit shows and the input results demonstration.
7, as claim 4-6 loudspeaker box device as described in each, it is characterized in that: also comprise a clock unit, link to each other with the described signaling control unit that reads, be used to whole audio amplifier that clock information is provided, and play by described timing of reading signaling control unit realization digital audio and video signals or FM signal.
8, as claim 1-6 loudspeaker box device as described in each, it is characterized in that described digital audio file comprises MP3 format or window media audio WMA form.
9, loudspeaker box device according to claim 1 is characterized in that the memory device of described digital audio file comprises: flash memory, portable hard drive, mobile MP3 equipment and storage card.
10, as loudspeaker box device as described in the claim 9, it is characterized in that described storage card comprises: multimedia card MMC and safe digital card SD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420058513 CN2759090Y (en) | 2004-12-07 | 2004-12-07 | Loudspeaker box device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420058513 CN2759090Y (en) | 2004-12-07 | 2004-12-07 | Loudspeaker box device |
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| Publication Number | Publication Date |
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| CN2759090Y true CN2759090Y (en) | 2006-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420058513 Expired - Fee Related CN2759090Y (en) | 2004-12-07 | 2004-12-07 | Loudspeaker box device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013067958A1 (en) * | 2011-11-11 | 2013-05-16 | 杭州硅星科技有限公司 | Headset circuit |
| CN103824576A (en) * | 2014-02-28 | 2014-05-28 | 联想(北京)有限公司 | Information processing method and electronic device |
| CN106847323A (en) * | 2017-03-22 | 2017-06-13 | 广州酷狗计算机科技有限公司 | A kind of audio-frequence player device |
| CN106954134A (en) * | 2017-04-21 | 2017-07-14 | 先歌国际影音有限公司 | A kind of Disc player and its digital audio and video signals process circuit |
| CN108989918A (en) * | 2018-06-28 | 2018-12-11 | 石李超 | A kind of apparatus for processing audio and a kind of audio frequency broadcast system |
-
2004
- 2004-12-07 CN CN 200420058513 patent/CN2759090Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013067958A1 (en) * | 2011-11-11 | 2013-05-16 | 杭州硅星科技有限公司 | Headset circuit |
| CN103824576A (en) * | 2014-02-28 | 2014-05-28 | 联想(北京)有限公司 | Information processing method and electronic device |
| CN106847323A (en) * | 2017-03-22 | 2017-06-13 | 广州酷狗计算机科技有限公司 | A kind of audio-frequence player device |
| CN106847323B (en) * | 2017-03-22 | 2023-11-24 | 广州酷狗计算机科技有限公司 | Audio playing equipment |
| CN106954134A (en) * | 2017-04-21 | 2017-07-14 | 先歌国际影音有限公司 | A kind of Disc player and its digital audio and video signals process circuit |
| CN106954134B (en) * | 2017-04-21 | 2023-02-28 | 先歌国际影音股份有限公司 | Optical disk player and digital audio signal processing circuit thereof |
| CN108989918A (en) * | 2018-06-28 | 2018-12-11 | 石李超 | A kind of apparatus for processing audio and a kind of audio frequency broadcast system |
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