CN201910250U - Moving picture experts group audio layer-3 (MP3) player - Google Patents
Moving picture experts group audio layer-3 (MP3) player Download PDFInfo
- Publication number
- CN201910250U CN201910250U CN2011200282298U CN201120028229U CN201910250U CN 201910250 U CN201910250 U CN 201910250U CN 2011200282298 U CN2011200282298 U CN 2011200282298U CN 201120028229 U CN201120028229 U CN 201120028229U CN 201910250 U CN201910250 U CN 201910250U
- Authority
- CN
- China
- Prior art keywords
- usb
- player
- control device
- central processing
- processing unit
- 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 - Lifetime
Links
Images
Abstract
The utility model discloses a moving picture experts group audio layer-3 (MP3) player, which aims to provide the MP3 player which has a simple structure and low cost, not only can be operated as a host of a slave device, but also is capable of acquiring data from an external universal serial bus (USB) device and is convenient to use. The player comprises a central processing unit (1), a USB interface (2), a secure digital (SD) card socket (3), a USB control device (20) and a storage device (4), wherein the central processing unit (1) is used for controlling data transmission and signal processing; the USB interface (2) is used for the data transmission; the SD card socket (3) is connected with an external USB storage device; the USB control device (20) is used for selectively executing the functions of the slave device and the functions of the host; the storage device (4) is used for storing the data; the USB interface (2) is in wire joint with the USB control device (20); and the SD card socket (3), the USB control device (20) and the storage device (4) are respectively in the wire joint with the central processing unit (1). The MP3 player can be widely applied to the field of players.
Description
Technical field
The utility model relates to a kind of MP3 player.
Background technology
Progress and development of times along with science and technology, the radio cassette player of magnetic tape type is very popular owing to there are many shortcomings, capacity as tape is little, winding easily, volume carries inconvenience greatly, mechanicalness noise is big etc., it is replaced by digital player at present, again because used the compress mode of MP3, therefore under the prerequisite that guarantees tonequality, can deposit more song, because this player does not use mechanical hook-up, so volume dwindles and the sort of mechanical noise before not had greatly, performance further is improved, existing MP3 player has the USB interface, and this USB interface is the working method of HOST, though can not obtain data by means of main frame, but the slave function is not strong, can not control other equipment.
Moreover, the MP3 song that the user can like by the Internet download, be stored in then in SD card or the USB flash disk, but general computer equipment does not all have the interface of SD card, so the access song also must finish by card reader, and it is just cumbersome to operate like this, and general computing machine is not with tone playing equipment yet, and its function ratio of existing digital player is more single, and value-added content of product is lower, can not satisfy the many-sided needs of people.
The utility model content
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, and a kind of simple in structure, MP3 player that cost is low, easy to use is provided.
The technical scheme that the utility model adopted is: the utility model comprises the CPU (central processing unit) that is used for control data transmission and signal Processing, the USB interface, the SD card plug that are used for data transmission, be connected with the external USB memory storage, selectively carry out the USB control device of slave unit function and host function, be used to store the memory storage of data, described USB interface is connected with USB control device line, and described SD card plug, described USB control device, described memory storage all are connected with described CPU (central processing unit) line.
Described memory storage is SD card or USB flash disk.
Described USB control device is USB OTG.
Described USB control device comprises USB HOST controller and USB DEVICE controller.
Described MP3 player also comprises the key device that is used for input instruction, the audio output device that is used for output audio, described key device, described audio output device connect described CPU (central processing unit) respectively, and described USB control device has the end points of enumerating, AUDIO end points, MASS STORAGE end points, HID end points.
The beneficial effects of the utility model are: be because the utility model comprises the CPU (central processing unit) that is used for control data transmission and signal Processing, the USB interface that is used for data transmission, the SD card plug, be connected with the external USB memory storage, selectively carry out the USB control device of slave unit function and host function, be used to store the memory storage of data, described USB interface is connected with USB control device line, described SD card plug, described USB control device, described memory storage all is connected with described CPU (central processing unit) line, except the MP3 player is operated as main frame, reading of data from the external USB memory storage, in the time of also player can being connected with computing machine, with computing machine as main frame, the MP3 player is as slave unit, computing machine is operated, just can realize carrying out data communication by a USB interface, so the utility model is simple in structure with USB slave or usb host, cost is low, easy to use.
Because the utility model also comprises the key device that is used for input instruction, the audio output device that is used for output audio, described key device, described audio output device connects described CPU (central processing unit) respectively, described USB control device has the end points of enumerating, the AUDIO end points, MASS STORAGE end points, the HID end points, so can be with player as a kind of USB device, come with the computing machine communication by described USB interface, after connecting, itself and computing machine can show USB AUDIO on computers, USB HID, three kinds of equipment of USB MASS STORAGE, can finish the function of Card Reader during as USB MASS STORAGE equipment, because player has described audio output device, can come out the voice playing in the computing machine during as USB AUDIO, simultaneously, because player also has described key device, during as USB HID volume control apparatus, can come the volume of control computer to add/subtract by the described key device of player, a last song/next song, functions such as broadcast/time-out, gather multi-function in integral whole, the characteristics of M P3 player have been utilized fully, improve and strengthened its function, therefore, the utility model can be realized multiple function, expanded value of the product, bring convenience to the user.
Description of drawings
Fig. 1 is the utility model functional block diagram;
Fig. 2 is the utility model program flow diagram.
Embodiment
As Fig. 1, shown in 2, present embodiment comprises CPU (central processing unit) 1, USB interface 2, SD socket 3, memory storage 4, key device 5, audio output device 6, supply unit 7, display device 8, microphone 9, radio reception receiving trap 10, earphone 11, loudspeaker 12, USB control device 20, described USB control device 20, described SD socket 3, described memory storage 4, described key device 5, described audio output device 6, described supply unit 7, described display device 8, described microphone 9, described radio reception receiving trap 10 all is connected with described CPU (central processing unit) 1, described USB interface 2 is connected with USB control device 20 lines, described CPU (central processing unit) 1 is used to control each working cell data transmission and signal Processing etc., described USB interface 2 is used to give information with described SD socket 3 and imports and output, described memory storage 4 is used for information such as storage file data, it can be SD card or USB flash disk or flash memory or thumb type memory card, described key device 5 is used to operate the controls playing device, as control volume and add/subtract, a last song/next song, function such as broadcast/time-out and option, described audio output device 6 is used to play the sound signal that transmits from described CPU (central processing unit) 1, described supply unit 7 is for providing power supply, it can be common No. 5 batteries or No. 7 batteries, reserve battery and internal battery, wherein preferred internal battery, internal battery generally all is a lithium battery, described display device 8 can be LCD, be used to information of displaying the play such as song, the lyrics, the author, fileinfo etc., described microphone 9 is used for digital recording, input audio signal during re-reading study, described USB control device 20 is USB OTG main control chip or USB HOST/DEVICE main control chip, described USB HOST/DEVICE main control chip comprises USB HOST unit and USB DEVICE unit, also be provided with 4 end points on the described USB control device 20, be respectively to enumerate end points, the AUDIO end points, MASS STORAGE end points, the HID end points, the use distribution condition of the end points of described USB control device 20 is;
Simultaneously, described USB control device 20 disposes corresponding descriptor, and its data structure is:
UINT8?CONST?CONFIG_DESC_DATE【】=
{
Public part is described
MASS STORAGE partly describes
USB AUDIO partly describes
HID partly describes
}
Come with the computing machine communication by described USB interface 2, after connecting, itself and computing machine can show USB AUDIO on computers, USB HID, three kinds of equipment of USB MASS STORAGE, can finish the function of Card Reader during as USB MASS STORAGE equipment, because player has described audio output device 6, can come out the voice playing in the computing machine during as USB AUDIO, simultaneously, because player also has described key device 5, during as USB HID volume control apparatus, can come the volume of control computer to add/subtract by the described key device 5 of player, a last song/next song, functions such as broadcast/time-out gather multi-function in integral whole.
Concrete principle of work is: as shown in Figure 2,1, step 41, in the playing flow of MP3, perhaps under other pattern, as the FM radio-receiving mode, RTC real-time clock pattern, LINEIN pattern or the like, whether real-time detection USB is connected to PC; 2, step 42, USB slave mode are one of them patterns of MP3 player, mainly finish and realize three kinds of equipment after connecting computer; 3, step 43 mainly is the initialization setting of USB hardware; 4, step 44 mainly is the initialization setting of USB module; 5, step 45 mainly is the enumeration process of USB; 6, step 46, this part mainly are after equipment is successfully enumerated, the major cycle of program.
The utility model can be widely used in the player field.
Claims (5)
1. MP3 player, it is characterized in that: it comprises the CPU (central processing unit) (1) that is used for control data transmission and signal Processing, the USB interface (2) that is used for data transmission, SD card plug (3), be connected with the external USB memory storage, selectively carry out the USB control device (20) of slave unit function and host function, be used to store the memory storage (4) of data, described USB interface (2) is connected described SD card plug (3) with USB control device (20) line, described USB control device (20), described memory storage (4) all is connected with described CPU (central processing unit) (1) line.
2. a kind of MP3 player according to claim 1 is characterized in that: described memory storage (4) is SD card or USB flash disk.
3. a kind of MP3 player according to claim 1 is characterized in that: described USB control device (20) is a USB OTG main control chip.
4. a kind of MP3 player according to claim 1 is characterized in that: described USB control device (20) is a USB HOST/DEVICE main control chip, and it comprises USB HOST unit and USB DEVICE unit.
5. according to each described a kind of MP3 player of claim 1 to 4, it is characterized in that: described MP3 player also comprises the key device (5) that is used for input instruction, the audio output device (6) that is used for output audio, described key device (5), described audio output device (6) connect described CPU (central processing unit) (1) respectively, and described USB control device (20) has the end points of enumerating, AUDIO end points, MASS STORAGE end points, HID end points.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200282298U CN201910250U (en) | 2011-01-27 | 2011-01-27 | Moving picture experts group audio layer-3 (MP3) player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200282298U CN201910250U (en) | 2011-01-27 | 2011-01-27 | Moving picture experts group audio layer-3 (MP3) player |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201910250U true CN201910250U (en) | 2011-07-27 |
Family
ID=44302450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200282298U Expired - Lifetime CN201910250U (en) | 2011-01-27 | 2011-01-27 | Moving picture experts group audio layer-3 (MP3) player |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201910250U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104112468A (en) * | 2014-07-30 | 2014-10-22 | 刘瑞 | MP3 (MPEG-1 Audio Layer 3) player with cloud computing function |
-
2011
- 2011-01-27 CN CN2011200282298U patent/CN201910250U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104112468A (en) * | 2014-07-30 | 2014-10-22 | 刘瑞 | MP3 (MPEG-1 Audio Layer 3) player with cloud computing function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103543798B (en) | Combined type computer allowing expanded use | |
| CN201910250U (en) | Moving picture experts group audio layer-3 (MP3) player | |
| CN202150253U (en) | Flat karaoke peripheral system | |
| WO2021031503A1 (en) | Blockchain-based virtual currency portable operation terminal | |
| CN202694620U (en) | Portable musical instrument assistant apparatus | |
| CN205265899U (en) | Car DSP power amplifier audio processing system | |
| CN204721594U (en) | A kind of intelligent sound box | |
| CN204667875U (en) | Behaviour's music automixer | |
| CN201111736Y (en) | Multimedia antenatal training instrument | |
| CN202276415U (en) | Multifunctional digital projector | |
| CN206948298U (en) | A kind of radio | |
| CN205232431U (en) | Bluetooth sound box | |
| CN204229836U (en) | A kind of multifunctional electric commerce USB flash disk player system | |
| CN203968311U (en) | The portable microphone with KTV audio and wireless connecting function | |
| CN203192401U (en) | Movable-type all-in-one machine of television and DVD player | |
| CN211019199U (en) | Intelligent voice multimedia player | |
| CN203616996U (en) | Portable digital audio player | |
| CN215069219U (en) | Record system | |
| CN210378479U (en) | Intelligent voice multimedia player | |
| CN201576460U (en) | Portable medium player | |
| CN2874625Y (en) | General serial bus control circuit device of MTV player USB | |
| CN201536013U (en) | Waist-hanging type loud-speaker | |
| CN208272986U (en) | A kind of fm stereo radio based on AVR single chip | |
| CN102340642A (en) | Multifunctional digital projector | |
| CN201072863Y (en) | Frequency-modulation broadcast transmitter based on USB interface |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110727 |
|
| CX01 | Expiry of patent term |