CN101634677A - Digital instrument based on UVC transmission protocol and use method thereof - Google Patents
Digital instrument based on UVC transmission protocol and use method thereof Download PDFInfo
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- CN101634677A CN101634677A CN200810133785A CN200810133785A CN101634677A CN 101634677 A CN101634677 A CN 101634677A CN 200810133785 A CN200810133785 A CN 200810133785A CN 200810133785 A CN200810133785 A CN 200810133785A CN 101634677 A CN101634677 A CN 101634677A
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Abstract
本发明揭示了一种基于UVC传输协议的USB数字仪器，其包括依次电性连接的测试模块、转换接口模块及显示模块。其中，所述转换接口模块至少包括测试数据处理模块、测试数据存储模块、USB UVC控制模块及USB UVC传输模块。本发明使用USB接口可以省略数字仪器的显示部分而直接利用电脑或掌上电脑显示，成本低、体积小、应用方便。
The invention discloses a USB digital instrument based on the UVC transmission protocol, which includes a test module, a conversion interface module and a display module that are electrically connected in sequence. Wherein, the conversion interface module at least includes a test data processing module, a test data storage module, a USB UVC control module and a USB UVC transmission module. The present invention uses the USB interface to omit the display part of the digital instrument and directly utilizes a computer or a palm computer to display, and has low cost, small size and convenient application.
Description
Technical field
The invention belongs to input instruments such as electric variable, be specifically related to a kind of digital implementation based on the UVC host-host protocol that utilizes computer or palm PC as display, this instrument can be used for the measurement of all kinds of electric variables in the circuit.
Background technology
Along with the development of Digital Electronic Technique, utilize the surveying instrument of digital technology flourish.In digital implementation, a quasi-instrument is arranged based on personal computer (PC), on PC, add annexes such as detecting head and treatment circuit and form.They utilize the interface of PC with measured signal, are input in the PC as PCI, USB, LPT, serial ports or the like, utilize the PC system to handle, show and store then.This quasi-instrument is known as the digital implementation based on PC.Most widely used in the PC interface is USB, therefore many instruments with the USB mouth of PC as transmission interface.Technical field of the present invention at be this class digital implementation.
The USB digital implementation of each manufacturers produce of digital implementation all uses independently developed USB host-host protocol at present, and this is because the data that digital implementation itself collects are not visual, does not produce video data.Produce the logical value of measuring input signal as logic analyser, and digital oscilloscope regularly detects the level of input signal.When linking to each other with computer, each manufacturer can work out own USB host-host protocol usually, data are transferred to computer end by USB after, show after utilizing specific application program to handle again.When using this class digital implementation, complicated software and driving need be installed, give training.
The UVC standard realizes that by USB the USB device working group (USBDevice Working Group) in the forum (USB Implementer ' s Forum) works out, it has defined the transmission standard of video image, the standards such as type, form and control command that comprise data transmission make the equipment of following the UVC agreement can carry out the transmission [1] of standardized video data with computer.
The UVC standard to as if send or the USB device of receiver, video, its supports various video data layout, as:
a.Uncompressed(YUY2，NV12)
b.MJPEG
c.MPEG1-SS，MPEG2-TS，MPEG2-PS，MPEG4-SL
d.DV
The USB video equipment that meets the UVC standard is made of several addressable terminals (Terminal) and unit (Unit).Terminal is sending a little or acceptance point of video flowing, as:
A.CCD or cmos sensor, TV, the USB end points, or the like
The unit is video data route or processed part, as:
B. be used to the DSP that compresses or decompress, control module, or the like
The UVC standard is widely used in consumer electronics, as USB camera, the TV box of UVC standard, or the like.
In sum, be necessary in fact to design a kind of digital implementation and using method thereof of new employing UVC interface.
Summary of the invention
Technical matters to be solved by this invention is: a kind of USB digital implementation based on the UVC host-host protocol is provided, uses the video flowing after the UVC agreement is changed by the USB transmission, substituted the USB host-host protocol that each apparatus manufacture is worked out voluntarily.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of USB digital implementation based on the UVC host-host protocol, it comprises test module, translation interface module and the display module that electrically connects successively, it is characterized in that: described translation interface module comprises at least
Testing data processing module is used for measurement result is carried out analog to digital conversion and format;
The test data memory module is used for temporary measurement result;
USB UVC control module is used to make up the USB digital implementation that meets the UVC host-host protocol;
USB UVC transport module is used to control test data and is converted into UVC video data and output.
As one of preferred version of the present invention, described USB UVC transport module comprises digital video modular converter, SRAM frame data memory module and the USB UVC device controller that connects successively.
In addition, the present invention also provides a kind of using method of digital implementation of the UVC of employing interface, and this using method may further comprise the steps:
As one of preferred version of the present invention, described step 2 may further comprise the steps:
A. utilize the digital video modular converter to be converted to video data from the measurement data that test module collects;
B. above-mentioned video data is stored in the SRAM frame data memory module;
C. utilize USB UVC device controller according to the data in the standard format SRAM frame data memory module of UVC, send from USB port.
As one of preferred version of the present invention, the measurement point information that example dissolves in the described A step.
As one of preferred version of the present invention, the gridding information that example dissolves in the described A step.
As one of preferred version of the present invention, the Word message that example dissolves in the described A step.
As one of preferred version of the present invention, described B step comprises that measurement point information is attached on the described video data and together is stored.
As one of preferred version of the present invention, described B step comprises that gridding information is attached on the described video data and together is stored.
As one of preferred version of the present invention, described B step comprises that Word message is attached on the described video data and together is stored.
Compared with prior art, the invention has the advantages that:
Compare with common non-USB digital implementation, because computer popularization degree height, use the display part that USB interface can the digits deleted instrument and directly utilize computer or palm PC to show, cost is low, and volume is little, and it is convenient to use.
Compare with the common USB digital implementation:
1) free drive is moving, and is compatible good.All support the UVC agreement in MICROSOFT WINDOWS XP SP2 and the above operating system of VISTA, all will support UVC future in LINUX, MAC and handheld computer system.So long as support the computer of UVC can be directly as the display use of this invention.
2) performance of UVC is outstanding.UVC can transmit the live image of VGA size with the speed of 30 frame/seconds, can support various picture formats, supports the expansion of audio frequency, supports third-party expanded function.
3) because the UVC standard is to be worked out and open by USB tissue, and this standard is verified in a large amount of consumer electronics based on UVC (as camera, TV box), so reliability of the present invention and compatible better than the proprietary host-host protocol of other manufacturers.
Description of drawings
Fig. 1 is one embodiment of the present of invention synoptic diagram, and wherein, test result shows by notebook computer;
Fig. 2 is an alternative embodiment of the invention synoptic diagram, and wherein, test result shows by palm PC;
Fig. 3 is a system architecture diagram of the present invention;
Fig. 4 is a translation interface module diagram of the present invention;
Fig. 5 digital implementation data-switching becomes the virtual internal image synoptic diagram of hardware;
Fig. 6 watches the test result synoptic diagram on computers.
Embodiment
Be described in further detail below in conjunction with the enforcement of accompanying drawing technical solution of the present invention:
The present invention with the UVC standard implementation on digital implementation, as oscillograph, logic analyser, digital multimeter etc. based on computer.The digital implementation of this employing UVC interface is made of three parts:
Display part 3, computer or palm PC.Utilize computer or palm PC to show the result who tests out.
Wherein translation interface module 2 workflows are made of following steps:
(1) digital of digital video data conversion.From the digital implementation front-end collection to the data hardware conversion be internal image.
A. at first, the picture size according to the output of PC setting UVC interface defines onesize internal virtual figure image width high parameter;
The scanning sequency of B.UVC image output is from top-left coordinates, and first puts last point of right side according to the first row left side, and second row repeats then ... the order of delegation scans to the end.Construct two circulations according to this rule: first circulation is used for inner delegation mid point and from left to right circulates, and second loop nesting is used for vertical first row circulation of delegation to the end on first circulation.Capable refresh rate and row refresh rate that two round-robin cycle frequencys and UVC set are consistent.
C. judge above-mentioned two position attributions that recirculate a little, wherein interior loop is put corresponding X-axis coordinate, the corresponding Y-axis coordinate of outer circulation:
A. if grid position, the color of output grid;
B. if literal/scale position, the color of output character/scale;
If part of detecting 1 obtains the position of data correspondence, the color of output measurement point;
C. above-mentioned condition does not all meet, the output background color.
D. after outermost loop finished, the output of the video data of a two field picture finished, and two-layer circulation returns 0, and the frame rate of setting according to UVC begins circulation next time.
(2) SRAM frame data memory module.The image stream that (1) is generated is stored in the SRAM frame data memory module.In storage, information such as the measurement point that example dissolves from step (1) circulation, grid, literal can be stored one by one.
(3) USBUVC device controller.Be used for data according to the standard format SRAM frame data memory module of UVC.The every two field picture of UVC standard-required is additional when transmission to comprise the image rise time, speed, the frame head of frame information.According to this requirement each parametric synthesis is become frame head, be added on the image starting position, send from USB port with image.On PC or PDA, the image that generates in the step (1) shows in the system software of computer or palm PC, watches for the user.Utilize the systemic-function of UVC agreement correspondence, the user can store single image or continuous video recording on computers, further these data of analyzing and processing.
The UVC transmission is the virtual image that hardware produces at the internal simulation videoscanning among the present invention, and no longer is real video flowing, has broken through the application category of original UVC host-host protocol.
According to above-mentioned flow process, the non-visualized data that digital implementation is gathered becomes the video data that meets the UVC standard, and intuitively shows on computers according to the UVC agreement, has reached purpose of the present invention.
Concrete, be further described with regard to transmission, storage and the demonstration that how to realize test data in conjunction with Fig. 3 and Fig. 4.
Introduce the whole system operation flow process below.
As shown in Figure 3 and Figure 4, at first obtain the sampled data of analyzing usefulness from test lead.In order to cooperate the operating rate of video, in the unit interval of a two field picture, to sample, the data that collect are sent the test data memory module to by the sampling time sequencing, sample-the video data conversion for follow-up USB UVC processing module.
Here with the digital oscilloscope example.Suppose from the digital implementation front-end collection to data be:
d(1)＝0.841，d(2)＝0.909，d(3)＝0.141，d(4)＝-0.756，d(5)＝-0.958，d(6)＝-0.279......
Subscript in the bracket is represented the order of sampled data.Numerical value is the data that A/D quantizes.Data volume and precision are by the setting decision of digital implementation.
In USB UVC modular converter, the parameter of in store UVC virtual image, and the current setting of digital oscilloscope, as X-axis unit's precision and indication range, Y-axis unit's precision and indication range etc.
According to the unit precision and the indication range of X-axis, choose and extract from the test data memory module data block of needs by indication range by precision.When display precision and storage precision are inconsistent, do suitable approaching or the feasible precision unanimity of finally sending the USBUVC modular converter to of sampling algorithm.Then with data according to X-axis, Y-axis unit's precision is converted into pixel coordinates.
In USB UVC module, construct line scanning and column scan that two circulations are respectively applied for virtual image.Wherein line scanning is nested in the column scan.Line scanning is that current line begins from left to right, and column scan is that first row of every frame begins delegation's end to the end.
The current of scanning carries out matching check to following message:
A. whether be the coordinate axis net point;
B. whether be words identification points such as numeral, letter;
C. whether exist the detection data to match.
For example above-mentioned d (1)=0.841 supposes that the X-axis precision is 1: 1, and starting point is 0, and the Y-axis precision is 1: 100, is (Y=84, X=1) point of coordinate points in the virtual image through transforming the back.(Y=84 in the time of X=1), detects this point for detecting the Data Matching point to point when rank scanning.
When running into above-mentioned each condition and setting up, the corresponding point example is turned to the color value of respective settings.Do not meet any condition, example turns to background colour.With hardware conversion be after the internal image as shown in Figure 5.
These pixels are converted into the pixel format that UVC supports according to the requirement of UVC standard, output in the UVC frame memory and store.Information such as the grid that example dissolves in the said process, literal constitute a complete image with the detection data and are stored.For example, image shown in Figure 5 is stored in the video buffer.
System's while generates the frame head of UVC form according to parameter current and running status.The UVC frame head comprises data volume, rise time, information such as system time.This frame head is attached to the front end of frame data, has constituted the complete frame data bag that meets the UVC form.When the order that USB UVC control section reception computer end is sent, just the standard according to USB UVC is transferred to computer with data from usb bus, shows.Because need not to drive, thus can directly in " my computer " of Windows, watch the result, as illustrate shown in Figure 6.
As USB keyboard, USB mouse, the USB tissue has defined the descriptor and the control method of UVC equipment, if use the UVC video format to transmit, USB device must meet this definition.
The USB device that meets the UVC agreement is made of 2 end points (EP) at least.Wherein EP0 has realized the control end points, and EP1 has realized data transmission.
In EP0, realized:
1) USB enumerates control.
2) basic USB descriptor is as device descriptor.
3) UVC descriptor.
4) control of UVC.
In EP1, realized the transmission of video data to main frame.
In the descriptor of UVC, defined the basic module of UVC.Comprising:
1) description of ENDPOINT.
2) Output Terminal describes.Output Terminal is mapped on the outputting video streams.
3) Video Streaming describes.Form, size, definition such as speed.
When this USB device is connected on the usb host, host computer system is enumerated this equipment, and the descriptor that equipment will meet the UVC agreement is transferred to host side.Host side starts corresponding UVC system drive, each UVC parameter of initialization.These UVC parameters are mapped as corresponding video flowing controlled variable.
When host side starts the program that comprises the UVC video window, as " my computer ", host side starts EP1 and begins transmitting video-frequency flow.USB device receives the instruction back and starts the video transmission module, starts working.
Above embodiment is the unrestricted technical scheme of the present invention in order to explanation only.Any technical scheme that does not break away from spirit and scope of the invention all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008101337854A CN101634677B (en) | 2008-07-24 | 2008-07-24 | Digital instrument based on UVC transmission protocol and use method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101777036B (en) * | 2009-01-09 | 2011-12-14 | 比亚迪股份有限公司 | Device, USB equipment and method for realizing drive-free image data transmission |
| CN102662429A (en) * | 2012-02-29 | 2012-09-12 | 北京恒泰实达科技发展有限公司 | Display and display set |
| CN107087169A (en) * | 2017-03-22 | 2017-08-22 | 建荣半导体（深圳）有限公司 | A kind of compression method, UVC video equipments and electronic equipment |
| CN108200387A (en) * | 2017-12-26 | 2018-06-22 | 深圳进化动力数码科技有限公司 | A kind of transmission method of file, system and camera |
| CN109040786A (en) * | 2018-09-03 | 2018-12-18 | 锐捷网络股份有限公司 | Transmission method, device, system and the storage medium of camera data |
| CN114731339A (en) * | 2020-02-18 | 2022-07-08 | 华为技术有限公司 | Information transmission method and related equipment |
| US12231808B2 (en) | 2022-08-17 | 2025-02-18 | Huawei Technologies Co., Ltd. | Information transmission method and related device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100734351B1 (en) * | 2001-04-20 | 2007-07-03 | 엘지전자 주식회사 | Digital broadcast transmission system |
| CN2800658Y (en) * | 2004-10-25 | 2006-07-26 | 康佳集团股份有限公司 | Camera mobile phone with computer display function and data transmission function |
| JP4789753B2 (en) * | 2006-08-28 | 2011-10-12 | 富士通セミコンダクター株式会社 | Image data buffer device, image transfer processing system, and image data buffer method |
-
2008
- 2008-07-24 CN CN2008101337854A patent/CN101634677B/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101777036B (en) * | 2009-01-09 | 2011-12-14 | 比亚迪股份有限公司 | Device, USB equipment and method for realizing drive-free image data transmission |
| CN102662429A (en) * | 2012-02-29 | 2012-09-12 | 北京恒泰实达科技发展有限公司 | Display and display set |
| CN107087169A (en) * | 2017-03-22 | 2017-08-22 | 建荣半导体（深圳）有限公司 | A kind of compression method, UVC video equipments and electronic equipment |
| CN107087169B (en) * | 2017-03-22 | 2019-11-12 | 建荣半导体（深圳）有限公司 | A kind of compression method, UVC video equipment and electronic equipment |
| CN108200387A (en) * | 2017-12-26 | 2018-06-22 | 深圳进化动力数码科技有限公司 | A kind of transmission method of file, system and camera |
| CN109040786A (en) * | 2018-09-03 | 2018-12-18 | 锐捷网络股份有限公司 | Transmission method, device, system and the storage medium of camera data |
| CN114731339A (en) * | 2020-02-18 | 2022-07-08 | 华为技术有限公司 | Information transmission method and related equipment |
| CN114731339B (en) * | 2020-02-18 | 2024-01-30 | 华为技术有限公司 | Information transmission method and related equipment |
| US12231808B2 (en) | 2022-08-17 | 2025-02-18 | Huawei Technologies Co., Ltd. | Information transmission method and related device |
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|---|---|
| CN101634677B (en) | 2012-05-23 |
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Address after: Grand Cayman, Cayman Islands Georgetown South Church Street yogurt orchid hospital 309GT. Co-patentee after: Xinyuan Microelectronics (Shanghai) Co., Ltd. Patentee after: Core holdings limited company Co-patentee after: VeriSilicon Microelectronics (Beijing) Co., Ltd. Address before: Grand Cayman, Cayman Islands Georgetown South Church Street yogurt orchid hospital 309GT. Co-patentee before: VeriSilicon Microelectronics (Shanghai) Co., Ltd. Patentee before: VeriSilicon Holdings Co., Ltd. Co-patentee before: VeriSilicon Microelectronics (Beijing) Co., Ltd. |
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