CN2705860Y - Audio-video frequency playing device for insert system - Google Patents
Audio-video frequency playing device for insert system Download PDFInfo
- Publication number
- CN2705860Y CN2705860Y CN 200420033938 CN200420033938U CN2705860Y CN 2705860 Y CN2705860 Y CN 2705860Y CN 200420033938 CN200420033938 CN 200420033938 CN 200420033938 U CN200420033938 U CN 200420033938U CN 2705860 Y CN2705860 Y CN 2705860Y
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- audio
- module
- video
- usb
- embedded system
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Abstract
The utility model inserted audio-video playback equipment comprises USB HOST main control module, data cache module and the audio frequency and video playing module that is connected, this USB HOST main control module reads audio-video document in the USB mobile memory in data cache module, and the audio/video decoding module is decoded to the data in this data cache module.Described USB HOST main control module comprises USB receiver, USB controller and risc processor, this receiver and controller identification USB mobile device, and risc processor receives outside steering order.The utility model has been realized USB HOST function and the audio/video decoding function on non-PC, thereby this equipment can be integrated in user's the embedded system as a data interface module, make custom system can read USB mobile device, and finish the playing function of audio-video document by the audio/video decoding module as Slave.
Description
[technical field]
The utility model is about a kind of playing audio/video, especially about a kind of playing audio/video that can be used for embedded system.
[background technology]
Both sides' branch that USB (Universal Serial Bus, USB (universal serial bus)) technical manual will use USB to carry out data transmission divides two kinds of role: HOST and Slave into, and the specified data transmission can only occur between HOST and the Slave.At present, most HOST functional roles are integrated on various types of PCs (or above level machine), as notebook computer, desktop computer, server etc.; Most Slave role is integrated on the various mobile devices based on USB, as the digital camera of USB mobile memory and band USB interface.
But, for embedded system, because it does not have USB HOST module, so just cause the digital mobile equipment of above-mentioned USB interface as USB Slave to be applied in the embedded system.For the consumer who has the USB mobile device, (as MP3, MP4), it is higher so just to cause application cost to compare, especially for audiovisual applications in the family or in the automobile just to need to buy separately the digital product of the audio frequency and video playing function of internal memory.
[utility model content]
The purpose of this utility model is to provide a kind of playback equipment that can play and be used for embedded system to the audio-video document in the USB mobile device.
The purpose of this utility model is achieved in that this a kind of playing audio/video that is used for embedded system, comprise the USB HOST main control module, data cache module and the audio frequency and video playing module that are connected, this USB HOST main control module reads audio-video document in the USB mobile memory in data cache module, and the audio/video decoding module is decoded to the data in this data cache module.
Described USB HOST main control module comprises USB receiver, USB controller and risc processor, this receiver and controller identification USB mobile device, and risc processor receives outside steering order.
Compared with prior art, the utlity model has following advantage: the utility model has been realized USB HOST function and the audio/video decoding function on non-PC, thereby this equipment can be integrated in user's the embedded system as a data interface module, make custom system can read USB mobile device, and finish the playing function of audio-video document by the audio/video decoding module as Slave.
[description of drawings]
Fig. 1 is the hardware block diagram that the utility model is used for the playing audio/video of embedded system.
Fig. 2 is the hardware elementary diagram that the utility model is used for the playing audio/video of embedded system.
Fig. 3 is the software workflow figure of the utility model playing audio/video of being used for embedded system.
Fig. 4 is the hardware controls process flow diagram of the utility model playing audio/video of being used for embedded system.
[embodiment]
See also Fig. 1, the playing audio/video that the utility model is used for embedded system is in order to playing the audio-video document in the USB mobile device (as the USB mobile memory, have the digital camera of USB interface), and it comprises power supply, energy supply control module, USB HOST main control module, audio/video decoding module, data cache module, control knob and audiovisual module.Power supply can be the power supply of audio-visual equipment such as battery or sound equipment, and this power supply is powered to audio/video decoding module and USBHOST main control module by energy supply control module.USB HOST main control module is connected with the USB mobile device by USB interface, thereby realize the identification of audio-video document in the USB mobile device and read, file data after this reads is to store in the data cache module, the audio/video decoding module is decoded to the data in this data cache module, and audio-video signal is outputed to the audiovisual module.The user realizes the file of USB mobile device is selected to read and operation such as broadcast by control knob.In the present embodiment, this audiovisual module is earphone or sound equipment.
See also Fig. 2, it is a hardware elementary diagram of the present utility model.This USB HOST main control module comprises USB receiver, USB controller (UHC) and risc processor, carries out data transmission between this USB receiver and the USB controller.Data cache module is random access memory (RAM).This playing audio/video in use, the USB mobile device is connected with the USB interface of this equipment, begin to discern this USB mobile device by USB receiver and USB controller, risc processor receives the processing command that the user sends by control knob, by usb bus the audio-video document in the USB mobile device is read in the data cache module, if file is undesirable, then order is interrupted, if meet the requirements then this document is transported to the audio/video decoding module decodes, convert decoded digital signal to the analog audio-video signal by D/A converter module then, and output to the audiovisual module.In addition, this USB HOST main control module also comprises LED light, and this pilot lamp is represented the user mode of this equipment.
See also Fig. 3, it is a running software flow process of the present utility model, when the USB mobile device is connected to this equipment by USB interface, driver in the USB HOST main control module will identify this USB mobile device, pass through the file fetch program then, read audio-video document available in the USB mobile device to data cache module, realize the decoding of this document at last by the audio/video decoding module, and output to the audiovisual module and play.
See also Fig. 4, its hardware controls flow process of the present utility model.After the USB mobile device inserted this playing audio/video, through initialization, playback equipment can detect whether file available is arranged in the USB mobile memory.If file available is arranged, then the LED light perseverance is bright, and the user can carry out every play operation by control knob, finishes the back continuously and continues to wait for operation requests; If there is not file available, then LED light continues flicker, and the user duplicates available file layout again, again the USB mobile device is inserted this playback equipment and repeats aforesaid operations again.
The utility model has been realized USB HOST function and the audio/video decoding function on non-PC, and provide interface mode based on bus or serial, thereby this equipment can be integrated in user's the embedded system as a data interface module, make custom system can read USB mobile device, and finish the playing function of audio-video document by the audio/video decoding module as Slave.This equipment can also be realized the file system of FAT12/16, thereby when the user needs, the USB mobile device can be taken out from USB interface, and takes on oneself the PC and duplicate audio-video document, thereby makes things convenient for the user to carry out data acquisition and processing (DAP).This playing audio/video volume is little, in light weight, plug and play and applied widely, can be used as portable music player, also can be directly used in home audio equipment and the hoot device.
Claims (8)
1. playing audio/video that is used for embedded system, it is characterized in that: comprise the USB HOST main control module, data cache module and the audio frequency and video playing module that are connected, this USB HOST main control module reads audio-video document in the USB mobile memory in data cache module, and the audio/video decoding module is decoded to the data in this data cache module.
2. the playing audio/video that is used for embedded system as claimed in claim 1, it is characterized in that: described USB HOST main control module comprises USB receiver, USB controller and risc processor, this receiver and controller identification USB mobile device, risc processor receives outside steering order.
3. the playing audio/video that is used for embedded system as claimed in claim 2 is characterized in that: also comprise D/A converter module, this module is converted to the analog audio-video signal with the digital signal of audio/video decoding module output.
4. the playing audio/video that is used for embedded system as claimed in claim 3 is characterized in that: also comprise the audiovisual module, the analog audio-video signal of D/A converter module output is input to this audiovisual module.
5. as any described playing audio/video that is used for embedded system of claim 1-4, it is characterized in that: also comprise power supply and energy supply control module, this power supply is powered to audio/video decoding module and USB HOST main control module by energy supply control module.
6. as any described playing audio/video that is used for embedded system of claim 2-4, it is characterized in that: also comprise control knob, this control knob is connected with risc processor.
7. as any described playing audio/video that is used for embedded system of claim 1-4, it is characterized in that: described data cache module is a random access memory.
8. as any described playing audio/video that is used for embedded system of claim 1-4, it is characterized in that: also comprise the LED display lamp that is used to show USB HOST main control module duty.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420033938 CN2705860Y (en) | 2004-06-04 | 2004-06-04 | Audio-video frequency playing device for insert system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420033938 CN2705860Y (en) | 2004-06-04 | 2004-06-04 | Audio-video frequency playing device for insert system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2705860Y true CN2705860Y (en) | 2005-06-22 |
Family
ID=34850103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420033938 Expired - Fee Related CN2705860Y (en) | 2004-06-04 | 2004-06-04 | Audio-video frequency playing device for insert system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2705860Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1858748B (en) * | 2006-05-22 | 2011-12-07 | 上海怀瑾计算机科技有限公司 | Method for realizing directly access USB master facility end file from slave facility end at USB |
| CN102543128A (en) * | 2010-12-30 | 2012-07-04 | 上海博泰悦臻电子设备制造有限公司 | Audio and video decoding device and vehicle-mounted externally-connected audio and video playing device |
-
2004
- 2004-06-04 CN CN 200420033938 patent/CN2705860Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1858748B (en) * | 2006-05-22 | 2011-12-07 | 上海怀瑾计算机科技有限公司 | Method for realizing directly access USB master facility end file from slave facility end at USB |
| CN102543128A (en) * | 2010-12-30 | 2012-07-04 | 上海博泰悦臻电子设备制造有限公司 | Audio and video decoding device and vehicle-mounted externally-connected audio and video playing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |