CN204231575U - A kind of device detecting MIPI video signal quality - Google Patents

Abstract

The utility model belongs to display field and the field tests of liquid crystal module, is specifically related to a kind of device detecting MIPI video signal quality.It comprises the MIPI transport module for detecting the electrical characteristic of MIPI vision signal; For receiving MIPI vision signal, the HS signal of MIPI is converted into the MIPI receiver module of rgb video signal, for the RGB data detection module that detects the view data of MIPI vision signal and the detection control module for sending parameter and control signal.The utility model can detect the MIPI vision signal that video source produces, simple to operate, economical and practical, not only integrated level is high, and reliable operation, antijamming capability are strong, and detecting reliability and the efficiency of MIPI liquid crystal module can also be promoted, reduce its equipment cost and production cost.

Description

A kind of device detecting MIPI video signal quality

Technical field

The utility model belongs to display field and the field tests of liquid crystal module, is specifically related to a kind of device detecting MIPI video signal quality.

Background technology

Liquid crystal display module (Liquid Crystal Display Module, hereinafter referred to as module) and the use of relevant liquid crystal display (hereinafter referred to as equipment) very general, simultaneously also because MIPI (Mobile Industry Processor Interface moves Industry Processor Interface) signal stabilization is reliable, biography speed is high, power consumption is lower, a lot of module and equipment all pass through the display interface adopting this signal as receiver, video image.

Carry out producing at module and equipment thereof, debug, videograph process time need to produce by video signal source or video adapting plate (being all called for short video source below) MIPI vision signal to provide module displays signal source to it, therefore guarantee that the vision signal correctness that video source produces and reliability are the prerequisites ensureing module displays.

At present, market there is no for video source field correctness, the reliability that unified standard guarantees the MIPI vision signal exported, the detection of the picture signal that video source exports all is identified shown image pixel one by one by human eye, manually cut figure and continue to judge.This detection mode operating personnel not only easily judge by accident, are difficult to localized reason place when there is display problem; And be easily subject to the subjective impact of people by eye recognition, operating personnel are for a long time facing to image, and eyes are very easily tired, and these all can impact testing result; Again need build test platform when changing module, thus cause inefficiency, complex operation.

Therefore a kind of technical scheme is needed to detect, without the need to artificial judgement the MIPI picture signal that video source produces reliable, errorless, efficiently.

Utility model content

The purpose of this utility model is exactly the deficiency existed to solve above-mentioned background technology, provides a kind of device detecting MIPI video signal quality, and it has, and reliability is high, nothing erroneous judgement, feature simple to operate, detection efficiency is high, cost is low.

The technical solution adopted in the utility model is: a kind of device detecting MIPI video signal quality, comprising:

For sampling to the electrical characteristic of MIPI vision signal, the electric parameter and the MIPI electric parameter benchmark that obtain MIPI vision signal carry out contrasting the MIPI transport module detected;

For receiving HS signal and the LP signal of MIPI vision signal respectively, the HS signal of MIPI vision signal is converted into the MIPI receiver module of rgb video signal;

Detect for every frame RGB data is carried out contrast with raw image data successively, export the RGB data detection module of electric testing result signal and view data testing result signal;

For sending the detection control module of controling parameters and control signal, the electric testing result signal of reception and view data testing result signal.

The control end of described detection control module connects described MIPI transport module respectively, the control end of MIPI receiver module and RGB data detection module, the data output end of detection control module connects the data receiver of described MIPI transport module and MIPI receiver module respectively, first output of described MIPI transport module connects the input of MIPI receiver module, second output connects the second input of described RGB data detection module, first output of described MIPI receiver module connects the first input end of RGB data detection module, second output connects the second input of described RGB data detection module, the output of described RGB data detection module connects the signal receiving end of detection control module.

Further, described MIPI transport module comprises:

For MIPI vision signal being separated into the MIPI signal conversion module of HS signal and LP signal;

For the electric sampling and Quantifying module of MIPI HS signal of sampling to the electrical characteristic of HS signal in MIPI vision signal;

For the electric sampling and Quantifying module of MIPI LP signal of sampling to the electrical characteristic of LP signal in MIPI vision signal;

Carry out contrasting the electric detection module of MIPI signal detected for the electrical value of the MIPI vision signal by sampling and MIPI electric parameter benchmark;

The output of described MIPI signal conversion module connects the input of described MIPI receiver module, the data output end of data receiver connection detection control module, described MIPI HS signal electric sampling and Quantifying module is connected the input of the electric detection module of described MIPI signal with the output of MIPI LP signal electric sampling and Quantifying module, the control end that output connects the second input of described RGB data detection module, control end connects described detection control module of the electric detection module of MIPI signal.

Further, described MIPI receiver module comprises:

For judging the MIPI status control module of the different transmission states of the LP signal of MIPI;

For the MIPI LP data parse module of decoding to the LP signal of MIPI;

Spread its tail instruction and MIPI for the LP signal by MIPI instruction set of spreading its tail is carried out contrasting the MIPI detected and to be spread its tail instruction cache module;

The second input that the input of described MIPI status control module connects the first output of described MIPI transport module, signal output part connects described RGB data detection module, data output end connect the input of described MIPI LP data parse module, the output of described MIPI LP data parse module connects described MIPI and to spread its tail the input of instruction cache module, and described MIPI instruction cache module data receiver of spreading its tail connects the data output end of described detection control module.

Further, described MIPI receiver module also comprises:

MIPI for unstringing to the HS signal of MIPI transmits module of unstringing;

For the MIPI HS data LANE parse module that the parallel de-serializing data of the HS signal to MIPI unpacks;

The MIPI HS data that unpacked data for the HS signal by MIPI is converted into RGB data turn RGB data module;

The unstring input of module of described MIPI transmission connects the first output of described MIPI transport module, output connects the input of described MIPI HS data LANE parse module, the control end of described MIPI HS data LANE parse module connects the control end of described MIPI status control module, output connects the input that described MIPI HS data turn RGB data module, the output that described MIPI HS data turn RGB data module connects the first input end of described RGB data detection module, the data receiver that described MIPI HS data LANE parse module and MIPI HS data turn RGB data module is all connected the data output end of described detection control module.

Further, described RGB data detection module comprises:

For the every frame RGB data of buffer memory successively, export the rgb signal buffer control module of the good every frame RGB data of buffer memory successively simultaneously;

For the every width raw image data of buffer memory successively, export the original image buffer control module of the good every width raw image data of buffer memory successively simultaneously;

Carry out synchronizing relay operation for a line RGB data that will read and a line raw image data, make the Data Detection fifo module of its synchronism output;

The RGB data detection module detected is contrasted for every frame RGB data being carried out with raw image data successively;

For receiving the signal detecting result output module of RGB data testing result and the electric testing result of MIPI;

The input of described rgb signal buffer control module connects the output of described MIPI receiver module, output and control end are connected the input of described Data Detection fifo module and the control signal system end of RGB data detection module respectively, the input of original image buffer control module connects the output of described detection control module, output and control end are connected the input of described Data Detection fifo module and the control signal end of RGB data detection module respectively, the output of described Data Detection fifo module connects the input of described RGB data detection module, the output of described RGB data detection module connects the input of described signal detecting result output module, control end connects the control end of described detection control module, the output of described signal detecting result output module connects the signal receiving end of described detection control module.

Further, described RGB data detection module also comprises:

For alternately storing RGB frame data buffer storage first module and RGB frame data buffer storage second module of every frame RGB data of rgb video signal data buffer storage successively, for alternately storing initial data image buffer memory first module and initial data image buffer memory second module of every width raw image data of original image buffer control module buffer memory successively;

Described RGB frame data buffer storage first module and the data receiver of RGB frame data buffer storage second module are connected the data processing end of rgb signal buffer control module respectively;

Described initial data image buffer memory first module and the data receiver of initial data image buffer memory second module are connected the data processing end of original image buffer control module respectively.

Further, described detection control module comprises:

For receiving Ethernet, RS232, RS485 interface module of controling parameters;

For receiving USB, SD card interface module of raw image data;

For sending the upper-layer configured module of controling parameters and control signal, the electric testing result signal of reception and view data testing result signal,

The control end of described upper-layer configured module as the control end of detection control module, data output end as the data output end of detection control module, the signal receiving end of described upper-layer configured module connects the output of described RGB data detection module, and described upper-layer configured module input connects the output of described Ethernet, RS232, RS485 interface module and USB, SD card interface module respectively.

The beneficial effects of the utility model are:

The utility model can detect the MIPI vision signal that video source produces, and the utility model, by arranging, well can be adapted to the different qualities such as color range, transmission means, coded system of different MIPI transmission characteristics, vision signal.

The utility model can detect the electrical characteristic of the MIPI vision signal that video source produces, and by input MIPI electric parameter standard, in the utility model, obtains testing result and output display through comparison.

The utility model can detect the view data of the MIPI vision signal that video source produces, by the every frame image data of buffer memory in advance and and raw video image contrast, thus judge whether each pixel exports correctly, and every two field picture all can detect.

The utility model can detect the highest MIPI video resolution, not only integrated level is high, reliable operation, antijamming capability are strong, and it is simple to operate, economical and practical, detecting reliability and the efficiency of MIPI liquid crystal module can not only be promoted, reduce its equipment cost and production cost, also will improve the universal of related display device further.

The utility model is by realizing described repertoire with FPGA (field programmable logic array) chip, DDR (DoubleDate Rate double data rate) storage chip, A/D (analog/digital) conversion chip; Above-mentioned device is all the common chips in market, they not only working stability, realize easily, and low price, avoid the problem such as design complexity, poor stability, design cost height caused because using various special chip.

Accompanying drawing explanation

Fig. 1 is structured flowchart of the present utility model.

Fig. 2 is the circuit block diagram of MIPI transport module and MIPI receiver module in Fig. 1.

Fig. 3 is the circuit block diagram of RGB data detection module in Fig. 1.

Fig. 4 is the circuit block diagram of detection control module in Fig. 1.

In figure: 1-MIPI transport module, 11-MIPI signal conversion module, 12-MIPI HS signal is electrically sampled and quantization modules; The electric sampling and Quantifying module of 13-MIPI LP signal; The electric detection module of 14-MIPI signal;

2-MIPI receiver module, 21-MIPI status control module, 22-MIPI transmission is unstringed module, 23-MIPI LP data parse module, 24-MIPI HS data LANE parse module, and 25-MIPI HS data turn RGB data module, and 26-MIPI is spread its tail instruction cache module;

3-RGB data detection module, 31-RGB signal buffer control module, 32-RGB frame data buffer memory first module, 33-RGB frame data buffer memory second module, 34-original image buffer control module, 35-initial data image buffer memory first module, 36-initial data image buffer memory second module, 37-RGB data detection module, 38-signal detecting result output module, 39-Data Detection fifo module;

4-detection control module, 41-Ethernet, RS232, RS485 interface module, 42-USB, SD card interface module, 43-upper-layer configured module.

Embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, is convenient to be well understood to the utility model, but they do not form restriction to the utility model.

As Figure 1-4, the device of detection MIPI video signal quality of the present utility model comprises: MIPI transport module 1, MIPI receiver module 2, RGB data detection module 3 and detection control module 4.The control end of detection control module 4 connects described MIPI transport module 1 respectively, the control end of MIPI receiver module 2 and RGB data detection module 3, the data output end of described detection control module 4 connects the data receiver of described MIPI transport module 1 and MIPI receiver module 2 respectively, first output of described MIPI transport module 1 connects the input of MIPI receiver module 2, second output connects the second input of described RGB data detection module 3, first output of described MIPI receiver module 2 connects the first input end of RGB data detection module 3, second output connects the second input of described RGB data detection module 3, the output of described RGB data detection module 3 connects the signal receiving end of detection control module 4.

MIPI transport module 1, for sampling to the electrical characteristic of MIPI vision signal, the electric parameter of acquisition MIPI vision signal and MIPI electric parameter benchmark carry out contrast and detect, and export electric testing result signal.

MIPI transport module comprises 1:

MIPI signal conversion module 11, for being separated into the MIPI signal of HS signal and LP signal by MIPI vision signal according to the MIPI reception match parameter received.

The electric sampling and Quantifying module 12 of MIPI HS signal, the electrical characteristic such as voltage, electric current for the HS signal to MIPI vision signal is sampled, and by AD conversion chip, sampled signal (analog quantity) is quantized, namely convert the digital bit value of different size to, export to the electric detection module 14 of MIPI signal.

The electric sampling and Quantifying module 13 of MIPI LP signal, the electrical characteristic such as voltage, electric current for the LP signal to MIPI vision signal is sampled, and by AD conversion chip, sampled signal (analog quantity) is quantized, namely convert the digital bit value of different size to, export to the electric detection module 14 of MIPI signal.

The electric detection module 14 of MIPI signal, for after receiving the electric detection control signal of MIPI and MIPI electric parameter benchmark that detection control module sends, the electrical value of the MIPI signal of sampling and MIPI electric parameter benchmark are contrasted, if MIPI sample magnitude between the maxima and minima of MIPI electric parameter benchmark, represents that MIPI vision signal electrical quality is up to standard, otherwise is unsuccessfully.Then signal detecting result output module 38 is given by testing result (whether up to standardly namely tabulating which parameter), a road is given module 43 and is returned to PC display result via Ethernet, RS232, RS485 interface module 41 afterwards, and another road generation display feeding carries display screen 5 and shows.

The data output end that the output of described MIPI signal conversion module 11 connects the input of described MIPI receiver module 2, data receiver connects described detection control module 4, described MIPI HS signal electric sampling and Quantifying module 12 is connected the input of the electric detection module 14 of described MIPI signal with the output of MIPI LP signal electric sampling and Quantifying module 13, the control end that output connects the second input of described RGB data detection module 3, control end connects described detection control module 4 of the electric detection module of MIPI signal 14.

MIPI receiver module 2, for receiving HS signal and the LP signal of MIPI vision signal respectively, detects the data of HS signal and LP signal respectively, and HS signal is converted into rgb video signal simultaneously.MIPI receiver module 2 comprises:

MIPI status control module 21, for the view data detection control signal that detection control module 4 sends.

MIPI LP data parse module 23, for decoding to the LP signal of MIPI.

MIPI is spread its tail instruction cache module 26, and spread its tail instruction and MIPI for the LP signal that obtains decoding instruction set of spreading its tail is carried out contrast and detected.

MIPI transmits module 22 of unstringing, for unstringing to the HS signal of MIPI.

MIPI HS data LANE parse module 24, the parallel de-serializing data in the HS signal to MIPI unpacks.

MIPI HS data turn RGB data module 25, and the unpacked data for the HS signal by MIPI is converted into RGB data.

The input of MIPI status control module 21 connects the first output, the second input of signal output part connection RGB data detection module 3, the input of data output end connection MIPILP data parse module 23 of MIPI transport module 1, the output of MIPI LP data parse module 23 connects MIPI and to spread its tail the input of instruction cache module 26, and MIPI instruction cache module 26 data receiver of spreading its tail connects the data output end of detection control module 4.

MIPI transmits the first output of the input connection MIPI transport module 1 of module 22 of unstringing, output connects the input of MIPI HS data LANE parse module 24, the control end of MIPI HS data LANE parse module 24 connects the control end of MIPI status control module 21, output connects the input that MIPI HS data turn RGB data module 25, MIPI HS data turn the first input end of the output connection RGB data detection module 3 of RGB data module 25, the data receiver that MIPI HS data LANE parse module 24 and MIPI HS data turn RGB data module 25 is all connected the data output end of detection control module 4.

RGB data detection module 3, for every frame RGB data of the view data detection control signal that sends according to upper-layer configured module successively buffer memory rgb video signal, control signal buffer memory raw image data is read according to original image, every frame RGB data is carried out contrast with raw image data successively detect, export electric testing result signal and view data testing result signal;

RGB data detection module 3 comprises:

Rgb signal buffer control module 31, for according to the every frame RGB data of operating control signal successively buffer memory, exports the good every frame RGB data of buffer memory simultaneously successively;

RGB frame data buffer storage first module 32 and RGB frame data buffer storage second module 33, for alternately storing every frame RGB data of rgb signal buffer control module 31 buffer memory successively;

Original image buffer control module 34, for reading the control signal every width raw image data of buffer memory successively according to original image, exports the good every width raw image data of buffer memory according to the operating control signal of RGB data detection module simultaneously successively;

Initial data image buffer memory first module 35 and initial data image buffer memory second module 36, for alternately storing every width raw image data of original image buffer control module 34 buffer memory successively.

Data Detection fifo module 39, carries out synchronizing relay operation for a line RGB data that will read and a line raw image data, makes its synchronism output;

RGB data detection module 37, for according to the view data detection control signal that receives to rgb signal buffer control module and original image buffer control module transmit operation control signal, according to original image resolution, every frame RGB data is carried out contrast with raw image data successively to detect, the object of detection comprises each pixel size and the location of pixels of RGB data simultaneously.

Signal detecting result output module 38, the electric testing result of MIPI that RGB data testing result and the electric detection module of MIPI signal for receiving the output of RGB data detection module export, and send detection consequential signal to detection control module.

The input of rgb signal buffer control module 31 connects the output of MIPI receiver module 2, output and control end are connected the input of described Data Detection fifo module 39 and the control signal end of RGB data detection module 37 respectively, the input of original image buffer control module 34 connects the data output end of detection control module 4, output and control end are connected the input of described Data Detection fifo module 39 and the control signal end of RGB data detection module 37 respectively, the output of Data Detection fifo module 39 connects the input of RGB data detection module 37, the output of described RGB data detection module 37 connects the input of described signal detecting result output module 38, first control end connects the control end of detection control module 4, the output of signal detecting result output module 38 connects the signal receiving end of detection control module 4.RGB frame data buffer storage first module 32 is connected the data processing end of rgb signal buffer control module 31 respectively with the data receiver of RGB frame data buffer storage second module 33.Initial data image buffer memory first module 35 is connected the data processing end of original image buffer control module 34 respectively with the data receiver of initial data image buffer memory second module 36.

Detection control module 4, for sending electric detection control signal and MIPI electrical reference parameter to MIPI transport module; For instruction set of spreading its tail to MIPI receiver module transmission MIPI, MIPI data LANE number arranges and MIPI data 6/8/10bit is arranged; For sending view data detection control signal, original image reading control signal, raw image data and original image resolution to RGB data detection module, and receive electric testing result signal, view data testing result signal and MIPI Data Detection result.

Detection control module 4 comprises:

Ethernet, RS232, RS485 interface module 41, for receiving MIPI electric parameter benchmark, MIPI transmits match parameter, MIPI reconciles parameter and video decode parameter, the utility model arranges MIPI and transmits match parameter (termination impedance in PC upper layer software (applications), balanced), MIPI electrical reference parameter (maximum voltage, minimum voltage, overshoot, undershoot, electric current etc.), MIPI spread its tail instruction set, MIPI data LANE number arrange and MIPI data 6/8/10bit arrange, tested image level resolution, vertical resolution (being also the resolution of original image).After checkout gear starts, Ethernet, RS232, RS485 interface module 41 input above-mentioned Ethernet containing PC controling parameters, rs 232 serial interface signal recover its parameter and send into upper-layer configured module 43.

USB, SD card interface module 42, for electrically detect at MIPI up to standard after, receive raw image data and send into upper-layer configured module 43;

Upper-layer configured module 43, receives match parameter, electrically detection control signal and MIPI electrical reference parameter to MIPI transport module for sending MIPI when MIPI electrically detects; After electric detection is up to standard, for PC controling parameters will be received and be distributed to other functional modules from Ethernet, RS232, RS485 interface module, namely send MIPI spread its tail instruction set, MIPI data LANE number arranges and MIPI data 6/8/10bit is set to MIPI receiver module; For sending view data detection control signal, original image reading control signal, raw image data and original image resolution to RGB data detection module.

The control end of upper-layer configured module 43 as the control end of detection control module 4, data output end as the data output end of detection control module 4, the signal receiving end of described upper-layer configured module 43 connects the output of described RGB data detection module 3, and described upper-layer configured module 43 input connects the output of described Ethernet, RS232, RS485 interface module 41 and USB, SD card interface module 42 respectively.

Adopt the process of the MIPI vision signal of the utility model detection source generation frequently as follows:

Step 1, PC instruction set of being spread its tail by MIPI in upper strata is sent into MIPI by detection control module 4 and to be spread its tail instruction cache module 26.After completing, the tested video source of startup produces MIPI vision signal.

Step 2, upper-layer configured module 43 sends MIPI electric detection control signal and electrically detects the tested MIPI vision signal inputted to MIPI transport module 1.Because MIPI vision signal is LP (Low Power) and HS (High Speed) state when transmitting, level standard both it, transformation parameter is all different, therefore electrically sample and quantization modules 12 respectively by MIPI HS signal, the electric sampling and Quantifying module 13 of MIPI LP signal is sampled to both state respectively and quantize, and the numerical value quantized is sent into the electric detection module 14 of MIPI signal, make it to compare with MIPI electrical reference parameter (comprising MIPI HS electric parameter benchmark and MIPI LP electric parameter benchmark), and check result is sent into module 38.Automatically MIPI Data Detection is carried out after electric detection is up to standard.

Step 3, the MIPI Signal separator containing HS with LP state received is become special HS signal (LVDS signal) and LP signal (LVCMOS signal) by MIPI signal conversion module 11.Wherein HS signal comprises HS clock and data (LANE number is that 0 ~ 3, LANE number is arranged by top level control).LP signal, HS signal send into MIPI status control module 21 respectively, module 22 is unstringed in MIPI transmission.The different level value order of the LP signal of MIPI represents different transmission states.Transmission LP data (what transmit is the instruction of spreading its tail of LP electrical characteristic) are represented when the level value that MIPI status control module 21 detects LP signal is high level, then LP signal is input in MIPI LP data parse module 23, carry out decoding according to LPDT agreement and obtain its instruction of spreading its tail, after decoding obtains each instruction of spreading its tail, this to be spread its tail instruction and be cached to MIPI the spread its tail instruction of spreading its tail accordingly of instruction set of MIPI in instruction cache module 26 of spreading its tail and carry out contrast and detect, and testing result is passed to signal detecting result output module 38 by MIPI status control module 21.

Step 4, when MIPI status control module 21 detects that the level value of LP signal is low level, when namely representing HS transmission, then control MIPI HS data LANE parse module 24 starts to receive MIPIHS data.Before this, its HS data are conspired to create parallel word joint while transmitting (MIPI signal be serial data transmission mode) by HS clock solution by MIPI transmission module 22 of unstringing.MIPI HS data LANE parse module 24 arranges according to MIPI data LANE number and unpacks the parallel de-serializing data of corresponding LANE.The operating process unpacked is: according to DSI (Display SerialInterface) agreement of MIPI, the row of Recovery image, field, data parallel bus signals.If incidental ECC when MIPI HS data LANE parse module 24 detects that unpacked data are transmitted with it, CRC check value are identical, determine that MIPI transfer of data is correct, otherwise mistake, and give signal detecting result output module 38 by MIPI status control module 21 by HS Data Detection result.Again the data unpacked are sent into MIPI HS data afterwards and turn RGB data module 25, convert complete RGB data to according to the MIPI data 6/8/10bbit setting that upper-layer configured module 43 sends, export RGB data detection module 3 to.

Step 5, after upper-layer configured module 43 obtains the electric testing result of MIPI, if up to standard, start view data detection control voluntarily to RGB data detection module 3, its view data receiving rgb video signal is detected automatically; Otherwise waiting for that PC does next step instruction, is continue detect data or again detect MIPI video electric signal.When MIPI is electrically up to standard, then the MIPI vision signal of MIPI signal shaping module 12 to input carries out shaping amplification, to reach optimum signal quality, avoids follow-up signal to change and detect occurring erroneous judgement.

Step 6, after MIPI is electrically up to standard, upper-layer configured module 43 automatically reads original image (original image and detected video source are same image) by USB, SD card interface module 42 and produces original image reading control signal and makes this image of its buffer memory to original image buffer control module 34.This original image is first cached in initial data image buffer memory first module 35 by original image buffer control module 34, initial data image buffer memory second module 36 is then cached to when detecting next width original image, these two modules are done ping-pong operation and adopt high speed DDR storage chip, thus can without the real-time detection different images data of pausing.

Step 7, MIPI vision signal demodulation module 21 receives orthopedic MIPI signal and carries out MIPI Dan Shuansi LINK signal receiving, adjustment reception line sequence according to the configuration parameter that upper-layer configured module 43 sends.The video decode parameter that MIPI vision signal decoder module 22 sends according to upper-layer configured module 43 carries out MIPI decoding, become the rgb video signal (i.e. VSYNC, HSYNC, DE, DATA) of standard according to 6bit, 8bit, 10bit picture format, VESA/JIEDA standard handovers, export to RGB data detection module 3.

Step 8, RGB data detection module 3 detects the first buffer memory of the rgb image data received again, and testing result is exported to display screen 5 and show and be sent on PC through module 43 and show.When RGB data detection module 37 receives view data detection control signal, then transmit operation control signal startup rgb signal buffer control module 31 receives rgb video signal.When rgb signal buffer control module 31 receives a new two field picture (namely finding that there is VSYNC from high level to low level saltus step), then this frame image data is cached to RGB frame data buffer storage first module 32, when this frame (i.e. present frame, hereinafter referred to as the n-th frame) after data are all cached to RGB frame data buffer storage first module 32, continue buffer memory (n+1)th frame immediately in RGB frame data buffer storage second module 33, notify that RGB data detection module 37 n-th frame data buffer memory completes and need detect it simultaneously; When in RGB data detection module 37 pairs of RGB frame data buffer storage first modules 32, the n-th frame data of buffer memory detect, the (n+1)th frame RGB data continues to be cached to RGB frame data buffer storage second module 33 by rgb signal buffer control module 31 simultaneously; After the (n+1)th frame RGB data buffer memory completes, RGB data detection module 37 has completed detection data cached in RGB frame data buffer storage first module 32, now continues to detect data cached in RGB frame data buffer storage second module 33 again.Namely rgb signal buffer control module 31 and RGB data detection module 37 replace respectively buffer memory, detect n-th, n+1 frame RGB data, namely the ping-pong operation between buffer memory/detection is carried out, without the every frame data of continuous detection paused, detection efficiency and reliability can be improve like this.RGB frame data buffer storage first module 32, RGB frame data buffer storage second module 33, initial data image buffer memory first module 35, initial data image buffer memory second module 36 all realize by DDR storage chip, thus realize large resolution big data quantity, high read-write operation, high reliability operation.

Step 9, when RGB data detection module 37 pairs of RGB data detect, first respectively by operation original image buffer control module 34, rgb signal buffer control module 31 reads the good current raw image data of institute's buffer memory and the n-th frame is detected RGB data.Due to cache module by phase same rate DDR storage chip is realized, but each DDR device is because of himself production technology and individual difference, causes its read-write operation speed not identical.Therefore for guaranteeing reliable Detection, need be stored in the corresponding FIFO (First InputFirst Output) of Data Detection fifo module 39 by the data read from cache module, Data Detection fifo module 39 has two FIFO to come respectively stored in raw image data and detected RGB data again.RGB data detection module 37 passes through operation original image buffer control module 34 according to configured horizontal resolution (i.e. a line view data number), rgb signal buffer control module 31 writes a line raw image data and the tested RGB data of a line in respective FIFO, the data then simultaneously read afterwards in these two FIFO compare, and (identical then expression is correct to record the pixel size result compared, otherwise represent mistake) and contrast location of pixels (which pixel of which row, X, Y-coordinate) and give signal detecting result output module 38 by its result and position.Due in FIFO again buffer memory once, reading data that can be simultaneously synchronous, therefore can adopt pipeline system operate when correction data, namely continuously reading is compared, and is constantly writing data into FIFO, and whole read-write comparison procedure is without pause.

Step 10, when last raw image data to be written in FIFO and after RGB data detection module 37 has compared by initial data image buffer memory first module 35, compare if rgb signal buffer control module 31 n-th frame is also last data accordingly, and middle comparison procedure does not have mistake, then think that this frame MIPI image exports correct, then continue detection (n+1)th frame data.If when rgb signal buffer control module 31 in the end raw image data completeer after still have data to be detected, then think image resolution ratio mistake, and result is given signal detecting result output module 38 and pass to upper strata PC, and stop the comparison of successive image (detected image resolution ratio cannot be judged, more meaningless).If when the resolution of view data detects correct, then still continue detection (n+1)th frame at some pixel error of intermediate image.

Step 11, the interface data that RGB data testing result and the electric testing result of MIPI carry out converting to applicable display screen 5 gives it to show by signal detecting result output module 38, convert to simultaneously the discernible protocol format of upper layer software (applications) after testing control module 4 give upper strata PC process.

Step 12, after current piece image has detected, before tested video source changes piece image output, upper strata PC first produces and switches image command to upper-layer configured module 43.Next width original image to be passed to original image buffer control module 34 by USB, SD card interface module 42 and to be cached in initial data image buffer memory second module 36 (initial data image buffer memory first module 35 buffer memory be current original image) by upper-layer configured module 43.Switch graphics control signals (being included in view data detection control signal) to RGB data detection module 37 when producing after completing buffer memory, tested video source starts the MIPI vision signal sending lower piece image simultaneously.RGB data detection module 37 then still complete when receiving and switching graphics control signals present image be buffered in the comparison of current n frame in RGB frame data buffer storage first module 32, RGB frame data buffer storage second module 33 and n+1 frame RGB data, operate rgb signal buffer control module 31 afterwards RGB frame data buffer storage first module 32, RGB frame data buffer storage second module 33 to be reset, view data testing process is afterwards same as described above.Consider that the process that video source gives the MIPI vision signal of an image has time delay, therefore Received signal strength again after also controlling the transmission time that the time delay of rgb signal buffer control module 31 is about field.

The content be not described in detail in this specification belongs to the known prior art of professional and technical personnel in the field.

Claims (7)

1. detect a device for MIPI video signal quality, it is characterized in that, comprising:

For sampling to the electrical characteristic of MIPI vision signal, the electric parameter and the MIPI electric parameter benchmark that obtain MIPI vision signal carry out contrasting the MIPI transport module (1) detected;

For receiving HS signal and the LP signal of MIPI vision signal respectively, the HS signal of MIPI vision signal is converted into the MIPI receiver module (2) of rgb video signal;

Detect for every frame RGB data is carried out contrast with raw image data successively, export the RGB data detection module (3) of electric testing result signal and view data testing result signal;

For sending the detection control module (4) of controling parameters and control signal, the electric testing result signal of reception and view data testing result signal;

The control end of described detection control module (4) connects described MIPI transport module (1) respectively, the control end of MIPI receiver module (2) and RGB data detection module (3), the data output end of described detection control module (4) connects the data receiver of described MIPI transport module (1) and MIPI receiver module (2) respectively, first output of described MIPI transport module (1) connects the input of MIPI receiver module (2), second output connects the second input of described RGB data detection module (3), first output of described MIPI receiver module (2) connects the first input end of RGB data detection module (3), second output connects the second input of described RGB data detection module (3), the output of described RGB data detection module (3) connects the signal receiving end of detection control module (4).

2. a kind of device detecting MIPI video signal quality according to claim 1, is characterized in that: described MIPI transport module (1) comprising:

For MIPI vision signal being separated into the MIPI signal conversion module (11) of HS signal and LP signal;

The electric sampling and Quantifying module (12) of MIPI HS signal for sampling to the electrical characteristic of HS signal in MIPI vision signal;

The electric sampling and Quantifying module (13) of MIPI LP signal for sampling to the electrical characteristic of LP signal in MIPI vision signal;

Carry out contrasting the electric detection module of MIPI signal (14) detected for the electrical value of the MIPI vision signal by sampling and MIPI electric parameter benchmark;

The output of described MIPI signal conversion module (11) connects the input of described MIPI receiver module (2), data receiver connects the data output end of described detection control module (4), described MIPI HS signal electric sampling and Quantifying module (12) is connected the input of the electric detection module of described MIPI signal (14) with the output of MIPI LP signal electric sampling and Quantifying module (13), the output of the electric detection module of MIPI signal (14) connects the second input of described RGB data detection module (3), control end connects the control end of described detection control module (4).

3. a kind of device detecting MIPI video signal quality according to claim 1, is characterized in that: described MIPI receiver module (2) comprising:

For judging the MIPI status control module (21) of the different transmission state of the LP signal of MIPI;

For MIPI LP data parse module (23) of decoding to the LP signal of MIPI;

Spread its tail instruction and MIPI for the LP signal by MIPI instruction set of spreading its tail is carried out contrasting the MIPI detected and to be spread its tail instruction cache module (26);

The input of described MIPI status control module (21) connects the first output of described MIPI transport module (1), signal output part connects the second input of described RGB data detection module (3), data output end connects the input of described MIPI LP data parse module (23), the output of described MIPI LP data parse module (23) connects described MIPI and to spread its tail the input of instruction cache module (26), described MIPI instruction cache module (26) data receiver of spreading its tail connects the data output end of described detection control module (4).

4. a kind of device detecting MIPI video signal quality according to claim 1, is characterized in that: described MIPI receiver module (2) also comprises:

MIPI for unstringing to the HS signal of MIPI transmits module (22) of unstringing;

For MIPI HS data LANE parse module (24) that the parallel de-serializing data of the HS signal to MIPI unpacks;

The MIPI HS data that unpacked data for the HS signal by MIPI is converted into RGB data turn RGB data module (25);

The unstring input of module (22) of described MIPI transmission connects the first output of described MIPI transport module (1), output connects the input of described MIPI HS data LANE parse module (24), the control end of described MIPI HS data LANE parse module (24) connects the control end of described MIPI status control module (21), output connects the input that described MIPI HS data turn RGB data module (25), the output that described MIPI HS data turn RGB data module (25) connects the first input end of described RGB data detection module (3), the data receiver that described MIPI HS data LANE parse module (24) and MIPI HS data turn RGB data module (25) is all connected the data output end of described detection control module (4).

5. a kind of device detecting MIPI video signal quality according to claim 1, is characterized in that: described RGB data detection module (3) comprising:

For the every frame RGB data of buffer memory successively, export the rgb signal buffer control module (31) of the good every frame RGB data of buffer memory successively simultaneously;

For the every width raw image data of buffer memory successively, export the original image buffer control module (34) of the good every width raw image data of buffer memory successively simultaneously;

Carry out synchronizing relay operation for a line RGB data that will read and a line raw image data, make the Data Detection fifo module (39) of its synchronism output;

The RGB data detection module (37) detected is contrasted for every frame RGB data being carried out with raw image data successively;

For receiving the signal detecting result output module (38) of RGB data testing result and the electric testing result of MIPI;

The input of described rgb signal buffer control module (31) connects the output of described MIPI receiver module (2), output and control end are connected the input of described Data Detection fifo module (39) and the control signal system end of RGB data detection module (37) respectively, the input of original image buffer control module (34) connects the output of described detection control module (4), output and control end are connected the input of described Data Detection fifo module (39) and the control signal end of RGB data detection module (37) respectively, the output of described Data Detection fifo module (39) connects the input of described RGB data detection module (37), the output of described RGB data detection module (37) connects the input of described signal detecting result output module (38), control end connects the control end of described detection control module (4), the output of described signal detecting result output module (38) connects the signal receiving end of described detection control module (4).

6. a kind of device detecting MIPI video signal quality according to claim 5, is characterized in that: described RGB data detection module (3) also comprises:

For alternately storing RGB frame data buffer storage first module (32) and RGB frame data buffer storage second module (33) of every frame RGB data of rgb video signal data buffer storage successively, for alternately storing initial data image buffer memory first module (35) and the initial data image buffer memory second module (36) of every width raw image data of original image buffer control module (34) buffer memory successively;

Described RGB frame data buffer storage first module (32) and the data receiver of RGB frame data buffer storage second module (33) are connected the data processing end of rgb signal buffer control module (31) respectively;

Described initial data image buffer memory first module (35) and the data receiver of initial data image buffer memory second module (36) are connected the data processing end of original image buffer control module (34) respectively.

7. a kind of device detecting MIPI video signal quality according to claim 1, is characterized in that: described detection control module (4) comprising:

For receiving Ethernet, RS232, RS485 interface module (41) of controling parameters;

For receiving USB, SD card interface module (42) of raw image data;

For sending the upper-layer configured module (43) of controling parameters and control signal, the electric testing result signal of reception and view data testing result signal,

The control end of described upper-layer configured module (43) as the control end of detection control module (4), data output end as the data output end of detection control module (4), the signal receiving end of described upper-layer configured module (43) connects the output of described RGB data detection module (3), and described upper-layer configured module (43) input connects the output of described Ethernet, RS232, RS485 interface module (41) and USB, SD card interface module (42) respectively.