CN109918033A - A kind of car-mounted display equipment video memory safety detection method - Google Patents
A kind of car-mounted display equipment video memory safety detection method Download PDFInfo
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- CN109918033A CN109918033A CN201811548897.6A CN201811548897A CN109918033A CN 109918033 A CN109918033 A CN 109918033A CN 201811548897 A CN201811548897 A CN 201811548897A CN 109918033 A CN109918033 A CN 109918033A
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- display
- check code
- information coding
- random check
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1407—General aspects irrespective of display type, e.g. determination of decimal point position, display with fixed or driving decimal point, suppression of non-significant zeros
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/1608—Error detection by comparing the output signals of redundant hardware
- G06F11/1616—Error detection by comparing the output signals of redundant hardware where the redundant component is an I/O device or an adapter therefor
- G06F11/162—Displays
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/36—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory
- G09G5/39—Control of the bit-mapped memory
- G09G5/393—Arrangements for updating the contents of the bit-mapped memory
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- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Human Computer Interaction (AREA)
- Computer Hardware Design (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
The present invention relates to a kind of car-mounted display equipment video memory safety detection method, include the following steps: that safe unit sends the first display information coding and the first random check code to display unit；The display unit is returned to the safe unit contains the Pixel Information of the display area of the first display information coding and the first random check code；The safe unit extracts the second display information coding and the second random check code, the first display information coding described in the first random check code and the second random check code and comparison and the second display information coding in the Pixel Information；When the described first random check code is different from the described second random check code or described first shows information coding and the second display information coding difference, the safe unit judgement display mistake.Using aforementioned schemes, the present invention can realize the display verification of end-by-end security text with lower cost.
Description
Present patent application is invention and created name " a kind of video memory safety detection method that inspection is returned based on block of pixels "
Divisional application, the applying date of original application are on August 22nd, 2016, and application No. is 2016107070930.
[technical field]
The present invention relates to mobile unit field more particularly to a kind of video memory safety detection methods that inspection is returned based on block of pixels.
[background technique]
On the train run now, it is equipped with various display equipment and safety equipment.And the car-mounted display equipment is in the presence of as follows
Problem: " operational mode " that ATP (on-vehicle safety equipment) can not show TOD (Vehicular display device) checks, when TOD mistake
" RM (mode of limitation operation) " mode is shown as " CM/AM (controlled pilot steering mode/train automatic driving mode) ", is led
Cause driving dangerous.That is, existing mobile unit only adopts the content for needing to show safely without effective detection method
With the mode of display content passback, no realization detects end to end.
[summary of the invention]
To solve foregoing problems, the present invention proposes a kind of car-mounted display equipment video memory safety detected to display content
Detection method.
To reach foregoing purpose, the present invention adopts the following technical scheme: a kind of car-mounted display equipment video memory safety detection side
Method includes the following steps:
Safe unit sends the first display information coding and the first random check code, the display unit root to display unit
Need to show picture according to the first display information coding determination, the display picture include described first show information coding,
Show information, the first random check code；
The display unit contains the first display information coding and the first random school to safe unit return
Test the Pixel Information of the display area of code；
The safe unit extracts the second display information coding and the second random check code in the Pixel Information, than
First display information coding described in the first random check code and the second random check code and comparison and the second display information
Coding；
When the described first random check code it is different from the described second random check code or it is described first display information coding with
When the second display information coding difference, the safe unit judgement display mistake；
Wherein, the display picture includes the first display information coding, shows information, the first random check code,
The display picture is pre-stored within display unit, described to show that picture includes described first shows information coding, display letter
Breath and the first random check code are successively arranged alternately on the display picture, the picture that the display unit is returned to safe unit
Prime information is the Pixel Information of the display picture, shows the reading manner of the Pixel Information of picture or using screenshotss or from display
Device drives are read.
Optional: the display area for the described first random check code that the display picture includes is N number of, the described display
The display area of information coding be it is N number of, the N be more than or equal to 1.
It is optional: the display area and institute of the display area of the first random check code and the first display information coding
The distance for stating the display area frame of display unit is definite value.
Optional: the first display information coding is finite aggregate；Or, the first random check code is ordered sequence
It and is finite aggregate.
Optional: the first display information coding and the first random check code are encoded by nine grids mode.
Optional: the bit number of each pixel is M in the Pixel Information, and the M is more than or equal to 1 and is less than or equal to 8.
Optional: the safe unit sends the first random check code and first display to the display unit
After information coding, the first random check code and the first display information coding are cached.The safe unit is from the picture
Extracted in element the second random check code and second display information coding after, can be found according to orderly random check code first with
Machine check code and the first display information coding, and be compared.
Using aforementioned schemes, the present invention can realize the display verification of end-by-end security text with lower cost.In this way, keeping away
Accident caused by having exempted from because of display problem.So that the function of mobile unit is more perfect, the safety of entire Train Transportation Simulation System
It is higher.
These features and advantages of the invention will the detailed exposure in following specific embodiment, attached drawing.
[Detailed description of the invention]
Following further describes the present invention with reference to the drawings.
Fig. 1 is the method flow schematic diagram of the embodiment of the present invention 1.
Fig. 2 is the display picture schematic diagram of the embodiment of the present invention 1.
[specific embodiment]
The technical solution of the embodiment of the present invention is explained and illustrated below with reference to the attached drawing of the embodiment of the present invention, but under
It states embodiment to be merely a preferred embodiment of the present invention, and not all.Based on the implementation example in the implementation mode, those skilled in the art
Obtained other embodiments without making creative work, belong to protection scope of the present invention.
Embodiment 1.
Referring to Fig. 1, a kind of safety display detection method for being returned inspection based on block of pixels is included the following steps:
Safe unit sends the first display information coding and the first random check code to display unit, and display unit is according to the
One display information coding determination need to show that picture, display picture include the first display information coding, show information, first at random
Check code；
Display unit contains the viewing area of the first display information coding and the first random check code to safe unit return
The Pixel Information in domain；
Safe unit extracts the second display information coding and the second random check code in Pixel Information, compare first with
Machine check code and the second random check code simultaneously compare the first display information coding and the second display information coding；
When the first random check code is different from the second random check code or the first display information coding and described second is shown
When information coding difference, safe unit judgement display mistake.
Referring to Fig. 2, show that picture includes the first display information coding, display information, the first random check code, display figure
Piece is pre-stored within display unit.The display area for the first random check code that display picture includes is N number of, the described display letter
Breath coding display area be it is N number of, N be more than or equal to 1.The first display information coding, the display information and that display picture includes
One random check code is successively arranged alternately on display picture.
The display area of first random check code and the first display area of display information coding and showing for display unit
The distance for showing region frame is definite value.As shown in Fig. 2, wherein high offset and width deviate as definite value, such as 10 millimeters, 8 millimeters.
The first information is encoded to finite aggregate, and the first random check code is ordered sequence and is finite aggregate.The first information
Coding and the first random check code are encoded by nine grids mode.
The Pixel Information that display unit is returned to safe unit is to show the Pixel Information of picture.Each picture in Pixel Information
The bit number of vegetarian refreshments is M, and M is more than or equal to 1 and is less than or equal to 8.The reading manner of Pixel Information for showing picture is；Read pixel
Method can by screenshotss (universal method), from display device drives read (linux framebuffer) in a manner of.
After safe unit sends the first random check code and the first display information coding to display unit, caching first is random
Check code and the first display information coding.Safe unit extracts the second random check code from pixel and the second display information is compiled
After code, the first random check code and the first display information coding can be found according to orderly random check code, and be compared.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, is familiar with
The those skilled in the art should be understood that the present invention includes but is not limited to attached drawing and interior described in specific embodiment above
Hold.Any modification without departing from function and structure principle of the invention is intended to be included in the range of claims.
Claims (7)
1. a kind of car-mounted display equipment video memory safety detection method, which comprises the steps of:
Safe unit sends the first display information coding and the first random check code to display unit, and the display unit is according to institute
Stating the first display information coding determination need to show that picture, the display picture include the first display information coding, display
Information, the first random check code；
The display unit contains the first display information coding and the first random check code to safe unit return
Display area Pixel Information；
The safe unit extracts the second display information coding and the second random check code in the Pixel Information, compares institute
State the first display information coding described in the first random check code and the second random check code and comparison and the second display information coding；
When the described first random check code it is different from the described second random check code or it is described first display information coding with it is described
When the second display information coding difference, the safe unit judgement display mistake；
Wherein, the display picture includes the first display information coding, shows information, the first random check code, described
Display picture is pre-stored within display unit, the first display information coding that the display picture includes, display information and
First random check code is successively arranged alternately on the display picture, the pixel letter that the display unit is returned to safe unit
Breath be it is described display picture Pixel Information, show the Pixel Information of picture reading manner or using screenshotss or from display equipment
Driving is read.
2. a kind of car-mounted display equipment video memory safety detection method according to claim 1, it is characterised in that: the display figure
The display area for the described first random check code that piece includes be it is N number of, it is described one display information coding display area be it is N number of,
The N is more than or equal to 1.
3. a kind of car-mounted display equipment video memory safety detection method according to claim 1, it is characterised in that: described first with
The display area frame of the display area and the display unit of the display area of machine check code and the first display information coding
Distance be definite value.
4. a kind of car-mounted display equipment video memory safety detection method according to claim 1, it is characterised in that: described first is aobvious
Show that information coding is finite aggregate；Or, the first random check code is ordered sequence and is finite aggregate.
5. a kind of car-mounted display equipment video memory safety detection method according to claim 1, it is characterised in that: described first is aobvious
Show that information coding and the first random check code are encoded by nine grids mode.
6. a kind of car-mounted display equipment video memory safety detection method according to claim 1, it is characterised in that: the pixel letter
The bit number of each pixel is M in breath, and the M is more than or equal to 1 and is less than or equal to 8.
7. a kind of car-mounted display equipment video memory safety detection method according to claim 1, it is characterised in that: the safety is single
After member sends the first random check code and the first display information coding to the display unit, caching described first with
Machine check code and the first display information coding.The safe unit extracted from the pixel the second random check code and
After second display information coding, the first random check code can be found according to orderly random check code and the first display information is compiled
Code, and be compared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811548897.6A CN109918033B (en) | 2016-08-22 | 2016-08-22 | Vehicle-mounted display equipment display memory safety detection method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610707093.0A CN106371783B (en) | 2016-08-22 | 2016-08-22 | A kind of safety display detection method for returning inspection based on block of pixels |
| CN201811548897.6A CN109918033B (en) | 2016-08-22 | 2016-08-22 | Vehicle-mounted display equipment display memory safety detection method |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610707093.0A Division CN106371783B (en) | 2016-08-22 | 2016-08-22 | A kind of safety display detection method for returning inspection based on block of pixels |
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| Publication Number | Publication Date |
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| CN109918033A true CN109918033A (en) | 2019-06-21 |
| CN109918033B CN109918033B (en) | 2022-07-26 |
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| CN201610707093.0A Active CN106371783B (en) | 2016-08-22 | 2016-08-22 | A kind of safety display detection method for returning inspection based on block of pixels |
| CN201811548897.6A Active CN109918033B (en) | 2016-08-22 | 2016-08-22 | Vehicle-mounted display equipment display memory safety detection method |
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| CN201610707093.0A Active CN106371783B (en) | 2016-08-22 | 2016-08-22 | A kind of safety display detection method for returning inspection based on block of pixels |
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| US7724259B2 (en) * | 2005-08-24 | 2010-05-25 | Innovative Solutions And Support, Inc. | Aircraft flat panel display system with improved information availability |
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| EP2244188A1 (en) * | 2009-04-25 | 2010-10-27 | Thales Deutschland Holding GmbH | Method for verifying correct data transfer to a video memory |
| CN103002251A (en) * | 2011-09-16 | 2013-03-27 | 现代摩比斯株式会社 | Image display device for vehicle and method for displaying rapid changed image inputted from camera for vehicle |
| EP2779151A1 (en) * | 2013-03-11 | 2014-09-17 | Renesas Electronics Europe Limited | Video output checker |
| CN105812785A (en) * | 2014-12-31 | 2016-07-27 | 饰而杰汽车制品（苏州）有限公司 | Device used for detecting imaging device and method used for detecting imaging device |
| CN105047116A (en) * | 2015-08-21 | 2015-11-11 | 昆山龙腾光电有限公司 | Image information processing method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109918033B (en) | 2022-07-26 |
| CN106371783B (en) | 2019-05-07 |
| CN106371783A (en) | 2017-02-01 |
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