CN101500175B - Test method and apparatus for digital display interface - Google Patents
Test method and apparatus for digital display interface Download PDFInfo
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- CN101500175B CN101500175B CN2008100573559A CN200810057355A CN101500175B CN 101500175 B CN101500175 B CN 101500175B CN 2008100573559 A CN2008100573559 A CN 2008100573559A CN 200810057355 A CN200810057355 A CN 200810057355A CN 101500175 B CN101500175 B CN 101500175B
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Abstract
The invention provides a method for testing a digital display interface and a device thereof, and the method comprises the following steps: a digital display interface signal which is output from the digital display interface and corresponds to a preset video signal is received and then is decoded as a digital signal; the digital signal is stored and then read and compared with the preset video signal to judge whether the digital signal is consistent with the preset video signal; if so, the digital display interface is determined as normal; otherwise, the digital display interface is determined as abnormal. The device comprises an encoding unit, a storing unit and a comparing unit. In the testing process of the technical proposal of the embodiment of the invention, as no operator is required to make a subjective judgment, the objective test of the digital display interface is realized, the test efficiency and reliability are improved, and the consumption of manpower is reduced; in addition, the realization is easy, and the purchase of expensive display device is not required, thus greatly reducing the test cost.
Description
Technical field
The present invention relates to the digital device field tests, particularly relate to a kind of method of testing and device of digital display interface.
Background technology
At present, when the digital display interface of factory testing digital device main frame such as DVI or DP, usually need to use the display that has digital signal interface, the operator pursues platform grafting display with main frame, the displaying contents of observation display, and judge whether this displaying contents is consistent with the output of pre-estimating, if it is consistent, the digital display interface of then determining main frame is working properly, otherwise, determine that its work is undesired.
The shortcoming of the method for testing of above-mentioned prior art is:
Buying and maintenance cost height, display need be purchased and safeguard to this method of testing; At present, the display of band DVI generally about 2000 yuan, supports that the display of DP is then more expensive; And, after buying display, also need to safeguard the cost of display;
The human cost height, the testing time that this method of testing expends is long, testing efficiency is low, need expend more human cost, and can form the test bottleneck when a large amount of production;
The test result subjectivity is strong, and this method of testing mainly is to estimate display result artificially, and tests by judging that result displayed is whether consistent with results estimated, so certainly exist the subjectivity of judgement, causes the not objective of test result.
Summary of the invention
Embodiments of the invention provide a kind of method of testing and device of digital display interface, to realize the objective examination to digital display interface.
To achieve these goals, on the one hand, provide a kind of method of testing of digital display interface, wherein, comprise the steps:
Known video and/or image file are videoed in the video memory with bitmap format;
Video information in the video memory of videoing is encoded, and the video information after will encoding is exported by digital display interface;
Reception is from the digital display interface signal of digital display interface output;
With described digital display interface signal decoding is digital video signal;
Store the video information in the described digital video signal, and the storage format of the video information in formats stored and the described video memory of videoing is identical;
Read the video information in the digital video signal of described storage, and whether more described digital video signal is consistent with described known video and/or the video information in the image file; In this way, determine that then described digital display interface is normal; Otherwise, determine that described digital display interface is unusual.
Another aspect provides a kind of testing apparatus of digital display interface, wherein, comprising:
Decoding unit, be used to receive digital display interface signal from digital display interface output, and be digital video signal with described digital display interface signal decoding, described digital display interface signal is: after a known video and/or image file are videoed in the video memory with bitmap format, to the signal by digital display interface output after the video information coding in the described video memory of videoing;
Memory cell, the video information that is used for storing the described described digital video signal that decodes, and the storage format of the video information in formats stored and the described video memory of videoing is identical;
Comparing unit be used for reading the video information of the digital video signal of described storage, and whether the video information in the more described digital video signal is consistent with described known video and/or the video information in the image file; In this way, determine that then described digital display interface is normal; Otherwise, determine that described digital display interface is unusual.
On the one hand, provide a kind of loop apparatus again, wherein, comprising:
Decoding unit, be used to receive the digital display interface signal of input, and be digital video signal with described digital display interface signal decoding, described digital display interface signal is: after a known video and/or image file are videoed in the video memory with bitmap format, to the signal by digital display interface output after the video information coding in the described video memory of videoing;
Memory cell, the video information that is used for storing the described described digital video signal that decodes, and the storage format of the video information in formats stored and the described video memory of videoing is identical;
The digital signal output unit is used for exporting the video information in the described digital video signal that described memory cell stores, and the video information in the described digital video signal is used for comparing with the described known video and/or the video information of image file.
Technique scheme has following technique effect:
The technique scheme of the embodiment of the invention is by being decoded as digital signal with what export in the digital display interface with a default corresponding digital display interface signal of vision signal, and after the storage digital signal, whether digital signal and the default vision signal by relatively storage consistent judge digital display interface normally whether, the technique scheme of the embodiment of the invention need not operating personnel and makes subjective judgement in test process, realized objective examination to digital display interface, the efficient and the reliability of test have been improved, reduced expending of manpower, and implement simple, need not to buy expensive display again, greatly reduce testing cost thus.
Description of drawings
Fig. 1 is that the method for testing of the digital display interface of the embodiment of the invention is summarized schematic flow sheet;
Fig. 2 is the operation principle schematic diagram of the digital display interface method of testing of one embodiment of the invention;
Fig. 3 is the operation principle schematic diagram of the digital display interface method of testing of another embodiment of the present invention;
Fig. 4 is the operation principle schematic diagram of the digital display interface method of testing of further embodiment of this invention;
Fig. 5 is the idiographic flow schematic diagram of the digital display interface method of testing of the embodiment of the invention;
Fig. 6 is the structural representation of testing apparatus of the digital display interface of the embodiment of the invention.
Embodiment
For technical problem, technical scheme and advantage that the embodiment of the invention will be solved is clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
Fig. 1 is that the method for testing of the digital display interface of the embodiment of the invention is summarized schematic flow sheet.As Fig. 1, the method for testing of the embodiment of the invention comprises:
In this embodiment, can be further after obtaining test result, with the step of result's output with the prompting user; Exemplarily, can point out the result of user test by alarm signal or alarm lamp.
Fig. 2 is the operation principle schematic diagram of the digital display interface method of testing of one embodiment of the invention.As Fig. 2, whether normal in order to test the digital display interface 202 that is provided with on first device 201, carry out following steps:
With in first device 201 with the corresponding digital display interface signal of default vision signal, exemplarily, from digital display interface 202 outputs, and arrive loop apparatus 203 as the digital display interface signal that produces by known video information;
The decoding unit 204 that is provided with in the loop apparatus 203 receives this digital displaying signal from digital display interface 202 outputs, and it is decoded as digital signal, exemplarily, as is decoded as the digital video signal of standard;
Then, control action by storage control unit 205 will this decoded digital signal such as the decoded digital video signal video information of carrying be stored in the memory cell 206, exemplarily, this storage control unit is a cache controller, the video information that this cache controller will this decoded digital video signal carries is stored in the memory cell 206, in internal memory with cache mode;
The video information of carrying as need output digital video signal, then from memory cell, read the digital signal of storage such as the video information that above-mentioned data video signal carries, and with its by output port be transferred to first the device, preferably, the video information that can will read from memory cell by the digital signal output unit 207 in the loop apparatus exports comparing unit to; Exemplarily, first device through the regular hour, is initiated reading order to loop apparatus behind digital display interface output digital displaying signal, after loop apparatus receives this order, and the video information of output storage; Exemplarily, digital signal output unit 207 can further comprise: be used to the digital signal exporting the output port of digital signal such as video information and be used for control store such as the video information output control unit from output port output;
After loop apparatus output video information, but first device receives this video information of reading back by the input port 209 of its receiving digital signals, then, whether the video information that relatively should receive by the comparing unit 210 that is provided with on it was consistent with pairing vision signal of digital displaying signal such as the video information originally exported from digital display interface; In this way, determine that then this digital display interface is normal, by test; Otherwise, determine that this digital display interface is unusual, not by test.
In this embodiment, with the corresponding digital display interface signal of default vision signal, as passing through the digital display interface signal that known video information produces in the first above-mentioned device 201, i.e. digital display interface signal by digital display interface output, can be by the video of external equipment input first device and/or the digital displaying signal of image file generation, be stored in the digital displaying signal that video in first device and/or image file produce in advance, or by video that is arranged on the functional module generation in first device and/or the digital displaying signal that image file produces, this functional module can be embodied as software module.
In this embodiment, comparing unit is a functional module, can be embodied as software module, and this comparing unit can be gone up the CPU with operational capability that is provided with by first device and move.
In this embodiment, input port 209 on first device and the output port in the loop apparatus, it can be any input/output port that transmits the digital video signal information of storage, as USB (USB, Universal Serial Bus) interface, serial ports, parallel port or other self-defining input/output port; When this input port and output port coupling, can directly be connected; As when not matching, can be by being connected again after the converting interface switching.
This embodiment of the present invention by relatively with the corresponding default vision signal of the digital display interface signal of from digital display interface, exporting with judged from the digital signal of loop apparatus input is whether consistent whether digital display interface normal afterwards; Particularly, digital display interface signal decoding, storage by will output and the data of storage are read back after, that stores in the video information of the bitmap format that relatively reads back and first device judges with whether the corresponding video information of digital display interface consistent.In the embodiments of the invention, use message bit pattern and relatively be because when the video information of loop apparatus output bitmap form, under display mode line by line, the information of any frame all is identical, is convenient to the video information that the video information corresponding with the digital display interface signal promptly produce the corresponding bitmap format of the video of digital display interface signal and/or image file like this and compares.
In the embodiments of the invention, first device that is provided with comparing unit has operational capability usually, can be main frame as it.
Fig. 3 is the operation principle schematic diagram of the digital display interface method of testing of another embodiment of the present invention.Identical with embodiment shown in Figure 2 is, digital display interface 202 to be measured is arranged on first device 201, export loop apparatus 203 as the digital display interface signal that utilizes default video signal generating from digital display interface with the corresponding digital display interface signal of default vision signal in first device, after being decoded into the standard digital vision signal by decoding unit 204, the video information of digital video signal being carried by storage control unit 205 stores in the memory cell 206 again, then when needs are exported, from memory cell, read digital video signal data and output, exemplarily, digital video signal and the output as read storage by the vision signal output unit.With embodiment illustrated in fig. 2 different be, in the embodiment shown in fig. 3, also comprise second device 301, the digital video signal of loop apparatus output is not imported first device, but imports second device; Store second vision signal in advance in this second device, it is consistent that being used to of presetting in this second vision signal and first device produces the vision signal of this digital display interface signal, and the video information that can show as both correspondences particularly is consistent.The digital video signal that this second device is exported by the input port 302 receiving loop devices that are provided with on it, and go up the comparing unit 303 of setting by it, relatively whether the corresponding video information of the digital video signal of the Jie Shouing video information of carrying and second vision signal of storage is consistent; In this way, determine that then digital display interface is normal; Otherwise, determine that this digital display interface is unusual.
In this embodiment, loop apparatus can respond second reading order that installs reads storage from memory cell video information and output; Also can be after cell stores, to read the video information of storage every timing, and export second device to by preset time; Can also be behind the first device output digital display interface signal, behind the preset time of delaying time, read the video information and the output of this storage.
In concrete the application, usually, embodiment shown in Figure 3 can be applicable to test the digital display interface that is provided with in first device that self does not have operational capability, and this embodiment of the present invention realizes above-mentioned signal function relatively by second device other, that have operational capability.Exemplary but not as restrictedly, for example, first device can be the DVD main frame that self does not have operational capability, second device can be the main frame with operational capability.
Exemplarily, above-mentioned loop apparatus can be designed to p-wire, testing cassete or other form, and it can be used as an independent subtest and uses in test process with instrument.In concrete the application, its needs are connected its input with digital display interface to be measured, and its output is connected with the input of first device or second device to get final product, very easy to use.
In specific implementation, decoding unit can be the decoder that is set to the plug-in card mode, so that support different interfaces on same equipment.
Fig. 4 is the operation principle schematic diagram of the digital display interface method of testing of further embodiment of this invention.As Fig. 4, in the digital display interface method of testing of further embodiment of this invention, comparing unit 210 can also be arranged in the loop apparatus, like this, the video information that reads by storage control unit 205 can directly can be imported comparing unit 210 from memory cell 206 compares for the comparing unit video information that it is corresponding with being stored in second vision signal in the loop apparatus in advance.With embodiment illustrated in fig. 3 similar, this second vision signal that is stored in loop apparatus is with corresponding from the digital display interface signal of digital display interface output, exemplarily, be used to produce from the default vision signal of the digital display interface signal of digital display interface output consistent in second vision signal and first device, particularly, the video information that can show as the second vision signal correspondence is consistent with the video information of vision signal that should be default.
According to embodiments of the invention, each unit in the loop apparatus and comparing unit can be integrated in the test that realizes in the device digital display interface, perhaps comparing unit can also exist as separate equipment.
Above-mentionedly the flow process of the method for testing of the embodiment of the invention is described.Below in conjunction with Fig. 5, once illustrate according to the trend of the unit of carrying out function and the information flow between the unit flow process again the method for testing of the embodiment of the invention.Particularly, comprise the steps:
Step 501 is videoed known video and/or image file in first device's memory such as the video memory; Wherein, when known video and/or image file were the bitmap file form, because the bitmap file form is consistent with the form of video memory, then this document can directly be videoed in the video memory; And when known video and/or image file were the file of other form, the file of this other form need be converted into the bitmap file form earlier, and then in the video memory of videoing;
Step 502 transfers to digital video coding unit such as digital video encoder with the video information in the video memory of videoing, as by bus such as rambus and Front Side Bus transmission;
Step 503, encode to the video information of storing in the video memory in the digital video coding unit, and the digital display interface signal after will encoding exports by digital display interface, so that transfer to other equipment such as testing equipment;
Step 504, decoding digital video unit such as digital Video Decoder receive from the digital display interface signal of digital display interface output, and decoding output digital video signal;
Step 505 deposits the video information in the digital video signal in memory cell such as the buffer memory in by storage control unit such as storage control, and this video information formats stored in buffer memory is consistent with video information formats stored in video memory;
Step 506, output control unit reads video information in the buffer memory by storage control unit, and export comparing unit to by low-speed interface such as serial ports, parallel port or USB mouth, this comparing unit can be arranged in the tested device, also can be arranged in the loop apparatus, also can be present in the miscellaneous equipment except that tested device, loop apparatus, also can be used as autonomous device and exists; Certainly work as comparing unit and be arranged in the loop apparatus, just do not need the video information that reads to be transferred to comparing unit and do not suffered by low-speed interface;
Step 507, the video information that comparing unit relatively reads and the video information of measured source promptly are used to produce the video information of the video digital display interface signal, known and/or image file correspondence, wherein, because the video information that reads is a bitmap format for formats stored in buffer memory, so compare again after when known video and/or image file are not bitmap format, need being translated into bitmap format earlier; Wherein, in first device to be measured the video information of known video and/or image file correspondence, what can be used for comparing with the video information that reads can also be identical other video and/or the corresponding video information of image file with known video and/or image file, same when it is not bitmap format, need be translated into earlier and import comparing unit again behind the bitmap format and compare.
In the embodiments of the invention, because the video information of input comparing unit is a bitmap format behind decoding, buffer memory, so it is the easiest to use bitmap file to generate digital displaying signal as known video or image file, like this, file map is being reached when comparing video information to video memory, need not the conversion of advanced style of writing part form.
In an embodiment of the present invention, because the speed height of digital display interface, and loop apparatus output speed is lower, therefore can not realize real-time comparison.In the embodiments of the invention, by utilizing bitmap file to make tested end export static video, be that each frame of figure is identical, the all corresponding identical video memory content of the content of each frame is a bitmap file, and return circuit testing device is a bitmap owing to what export, therefore under display mode line by line, the information of any frame all is identical, can conveniently compare like this.
The invention also discloses a kind of testing apparatus of digital display interface.Fig. 6 is the structural representation of testing apparatus of the digital display interface of the embodiment of the invention.As Fig. 6, the testing apparatus 600 of the embodiment of the invention comprises: decoding unit 601, be used to receive from the digital display interface signal of digital display interface output, it is corresponding that described digital display interface signal and is preset vision signal, and be digital signal with described digital display interface signal decoding; Memory cell 602 is used to store the described described digital signal that decodes; Comparing unit 603 is used to read the digital signal of described storage, and whether more described digital signal is consistent with described default vision signal; In this way, determine that then described digital display interface is normal; Otherwise, determine that described digital display interface is unusual.
Preferably, the testing apparatus of the embodiment of the invention also comprises: storage control unit is used for the described digital signal that decodes is stored in described memory cell with cache mode.
Preferably, the testing apparatus of the embodiment of the invention also comprises: the digital signal output unit is used to export the digital signal of described storage.
Preferably, in the testing apparatus of the embodiment of the invention, the digital signal output unit comprises:
At least a in USB (universal serial bus), serial ports and the parallel port; And,
Institute's output control unit is used for controlling the digital signal that described memory cell stores and exports from described at least a port.
Above-mentioned is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the described principle of the embodiment of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (12)
1. the method for testing of a digital display interface is characterized in that, comprises the steps:
Known video and/or image file are videoed in the video memory with bitmap format;
Video information in the video memory of videoing is encoded, and the video information after will encoding is exported by digital display interface;
Reception is from the described digital display interface signal of digital display interface output;
With described digital display interface signal decoding is digital video signal;
Store the video information in the described digital video signal, and the storage format of the video information in formats stored and the described video memory of videoing is identical;
Read the video information in the digital video signal of described storage, and whether the video information in the more described digital video signal is consistent with described known video and/or the video information in the image file; In this way, determine that then described digital display interface is normal; Otherwise, determine that described digital display interface is unusual.
2. method of testing according to claim 1 is characterized in that, the video information in the described digital video signal of described storage is: store video information in the described digital video signal with cache mode.
3. method of testing according to claim 1 and 2, it is characterized in that, video information in the described digital video signal that reads storage, and the video information in the more described digital video signal and described known video and/or the video information in the image file whether consistent step is:
First device that is provided with described digital display interface reads the video information in the digital video signal of described storage, and whether the video information in the more described digital video signal that reads is consistent with described known video and/or the video information in the image file.
4. method of testing according to claim 1 and 2, it is characterized in that, video information in the described digital video signal that reads described storage, and the video information in the more described digital video signal and described known video and/or the video information in the image file whether consistent step is:
Second device reads the video information in the digital video signal of described storage, and the video information in the more described digital video signal that reads be stored in advance described second the device in second vision signal in video information whether consistent, described second vision signal is corresponding with described known video and/or image file.
5. method of testing according to claim 1, it is characterized in that the video information in the described digital video signal that reads storage is: read video information in the described digital video signal by in USB (universal serial bus), serial ports, parallel port and the self-defined port at least one.
6. the testing apparatus of a digital display interface is characterized in that, comprising:
Decoding unit, be used to receive digital display interface signal from digital display interface output, and be digital video signal with described digital display interface signal decoding, described digital display interface signal is: after a known video and/or image file are videoed in the video memory with bitmap format, to the signal by digital display interface output after the video information coding in the described video memory of videoing;
Memory cell, the video information that is used for storing the described described digital video signal that decodes, and the storage format of the video information in formats stored and the described video memory of videoing is identical;
Comparing unit be used for reading the video information of the digital video signal of described storage, and whether the video information in the more described digital video signal is consistent with described known video and/or the video information in the image file; In this way, determine that then described digital display interface is normal; Otherwise, determine that described digital display interface is unusual.
7. testing apparatus according to claim 6 is characterized in that, also comprises:
Storage control unit is used for the video information of the described digital video signal that decodes is stored in the described memory cell with cache mode.
8. testing apparatus according to claim 6 is characterized in that, also comprises:
The digital signal output unit is used for exporting the video information in the described digital video signal that described memory cell stores.
9. testing apparatus according to claim 8 is characterized in that, described digital signal output unit comprises:
At least a in USB (universal serial bus), serial ports and the parallel port; And,
Output control unit is used for controlling the digital signal that described memory cell stores and exports from described at least a port.
10. a loop apparatus is characterized in that, comprising:
Decoding unit, be used to receive the digital display interface signal of input, and be digital video signal with described digital display interface signal decoding, described digital display interface signal is: after a known video and/or image file are videoed in the video memory with bitmap format, to the signal by digital display interface output after the video information coding in the described video memory of videoing;
Memory cell, the video information that is used for storing the described described digital video signal that decodes, and the storage format of the video information in formats stored and the described video memory of videoing is identical;
The digital signal output unit is used for exporting the video information in the described digital video signal that described memory cell stores, and the video information in the described digital video signal is used for comparing with the described known video and/or the video information of image file.
11. loop apparatus according to claim 10 is characterized in that, also comprises:
Storage control unit is used for the video information of described digital video signal is stored in the described memory cell with cache mode.
12. loop apparatus according to claim 10 is characterized in that, described digital signal output unit comprises:
At least a in USB (universal serial bus), serial ports and the parallel port; And,
Output control unit, the video information that is used for controlling in the digital video signal that described memory cell stores is exported from described at least a port.
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| CN106713904A (en) * | 2016-12-20 | 2017-05-24 | 郑州云海信息技术有限公司 | VGA interface test method, apparatus and system |
| CN108053784B (en) * | 2017-12-21 | 2020-11-24 | 苏州华兴源创科技股份有限公司 | System and method for testing high-speed image signal source |
| CN108896841A (en) * | 2018-03-19 | 2018-11-27 | 硅谷数模半导体（北京）有限公司 | Test macro, test method and device |
| CN110290378A (en) * | 2019-06-24 | 2019-09-27 | 福州瑞芯微电子股份有限公司 | A kind of MIPI DSI TX test method and equipment based on FPGA |
| CN110632415B (en) * | 2019-09-10 | 2022-05-03 | 上海创功通讯技术有限公司 | Device, system and method for testing plate-end LCM interface |
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