CN107204122B - Electronic eye broadcasting method and device - Google Patents
Electronic eye broadcasting method and device Download PDFInfo
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- CN107204122B CN107204122B CN201610158078.5A CN201610158078A CN107204122B CN 107204122 B CN107204122 B CN 107204122B CN 201610158078 A CN201610158078 A CN 201610158078A CN 107204122 B CN107204122 B CN 107204122B
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/09626—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages where the origin of the information is within the own vehicle, e.g. a local storage device, digital map
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Abstract
The embodiment of the application relates to an electronic eye broadcasting method and device, wherein the method comprises the following steps: acquiring the real-time running speed of a vehicle and an electronic eye to be broadcasted around the vehicle; obtaining a real-time broadcast distance of the electronic eye to be broadcast according to the real-time running speed of the vehicle and the type of the electronic eye to be broadcast; and judging whether the vehicle enters the real-time broadcast distance range of the corresponding electronic eye, and if so, broadcasting the electronic eye. It can be seen from above that, in this application embodiment, according to the real-time speed of traveling of vehicle, the report distance of developments definite electronic eye to when electronic eye is located this report distance range, trigger the report to this electronic eye, thereby can effectively indicate the user to pay close attention to corresponding electronic eye.
Description
Technical Field
The present application relates to the field of navigation, and in particular, to an electronic eye broadcasting method and apparatus.
Background
In order to maintain traffic order, a traffic department sets an electronic eye on a road, captures violation image-text information of a vehicle through the electronic eye, and penalizes violation behaviors of the vehicle, wherein the violation behaviors of the vehicle comprise overspeed, running a red light, parking violations and the like.
The existing navigation equipment prompts a user to follow traffic rules to drive safely in advance through an electronic eye broadcasting a road ahead of a vehicle. According to the existing electronic eye broadcasting method, firstly, the position point of the corresponding electronic eye is broadcasted along the path according to the broadcasting distance of the electronic eye, then, whether the vehicle reaches the position point of the corresponding electronic eye along the path is judged according to the real-time position of the vehicle, and when the position point of the corresponding electronic eye is broadcasted, the corresponding electronic eye is broadcasted.
The inventor finds that, in the prior art, a corresponding broadcast distance is set for an electronic eye in the process of compiling electronic map data, the broadcast distance of the electronic eye is a fixed value and is generally related to the road grade where the electronic eye is located, and because the broadcast distance of the electronic eye is a fixed value, the position point for broadcasting the electronic eye is also fixed, the road environment is increasingly complicated nowadays, and the problem that a user cannot be effectively prompted to pay attention to the corresponding electronic eye can occur when the electronic eye is broadcast on demand at the fixed position.
Disclosure of Invention
The embodiment of the application provides an electronic eye broadcasting method and device, which can effectively prompt a user to pay attention to a corresponding electronic eye.
In one aspect, an electronic eye-broadcasting method is provided, and the method includes:
acquiring the real-time running speed of a vehicle and an electronic eye to be broadcasted around the vehicle;
obtaining a real-time broadcast distance of the electronic eye to be broadcast according to the real-time running speed of the vehicle and the type of the electronic eye to be broadcast;
and judging whether the vehicle enters the real-time broadcast distance range of the corresponding electronic eye, and if so, broadcasting the electronic eye.
In another aspect, an electronic eye-broadcasting device is provided, the device including:
the electronic eye acquisition unit is used for acquiring the real-time running speed of a vehicle and the electronic eyes to be broadcasted around the vehicle;
the broadcast distance determining unit is used for obtaining the real-time broadcast distance of the electronic eye to be broadcast according to the real-time running speed of the vehicle and the type of the electronic eye to be broadcast, which are obtained by the electronic eye obtaining unit;
and the broadcasting unit is used for judging whether the vehicle drives into the real-time broadcasting distance range of the corresponding electronic eye determined by the broadcasting distance determining unit, and if so, broadcasting the electronic eye.
The application provides an electronic eye broadcasting method, which dynamically determines the real-time broadcasting distance of an electronic eye according to the real-time driving speed of a vehicle and the type of the electronic eye to be broadcasted, and broadcasts the electronic eye when the electronic eye is located within the range of the real-time broadcasting distance. According to the method and the device, the broadcasting distance of the electronic eye is dynamically determined according to the real-time driving speed of the vehicle and the type of the electronic eye to be broadcasted, so that a user can be effectively prompted to pay attention to the corresponding electronic eye.
Drawings
Fig. 1 is a schematic view of an application scene of an electronic eye broadcasting method according to an embodiment of the present application;
fig. 2 is a flowchart of an electronic eye broadcasting method provided in an embodiment of the present application;
fig. 3 is a schematic view of an electronic eye broadcasting scene provided in an embodiment of the present application;
fig. 4 is a schematic view of another electronic eye broadcasting scene provided in the embodiment of the present application;
fig. 5 is a structural diagram of an electronic eye-broadcasting device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
For the purpose of facilitating understanding of the embodiments of the present application, the following description will be made in terms of specific embodiments with reference to the accompanying drawings, which are not intended to limit the embodiments of the present application.
Fig. 1 is a schematic view of an application scenario of an electronic eye broadcasting method provided in an embodiment of the present application, referring to fig. 1, in the embodiment of the present application, mainly related objects include a vehicle 101, a navigation device 102, a road 103, and an electronic eye 104 arranged on the road 103, where the navigation device 102 is arranged on the vehicle 101 and is used to provide navigation guidance information for a user, for example, the electronic eye 104 shown in fig. 1 is broadcasted to remind a vehicle driver to pay attention to driving behavior of the vehicle driver to drive safely.
In this embodiment, the specific type of the navigation device 102 is not limited, and the navigation device 102 may be a device that has no connection relationship with the vehicle 101, for example, a mobile intelligent terminal installed with navigation (application) software or electronic map (application) software, specifically, a smart phone, or a device that has a connection relationship with the vehicle 101, for example, a vehicle-mounted device installed with navigation (application) software or electronic map (application) software, specifically, a vehicle-mounted device.
Considering the change of road traffic conditions and vehicle running speed, the electronic eye is broadcasted according to the fixed distance in the prior art, the broadcasting time of the electronic eye is inaccurate, and the user cannot be effectively prompted to pay attention to the electronic eye. For example, when the fixed broadcast distance of an electronic eye on a certain road is 200 meters, the driver of a vehicle running on the road will hear the broadcast prompt of the electronic eye at substantially the same position, but the time taken by the vehicles to pass through the electronic eye will also be different due to different running speeds of different vehicles, in this case, broadcasting the electronic eye at substantially the same position will cause a difference in the time left for the vehicle driver to react to the electronic eye, and thus some broadcast prompts will be invalid. In addition, on the same road, under the condition that the road conditions are different, the time taken by the vehicle from the time when the vehicle hears the report to the time when the vehicle passes through the electronic eye is different, for example, when the road is congested, the time taken by the vehicle to pass through the electronic eye is much longer than the time taken by the vehicle when the vehicle is unblocked, in this case, the electronic eye is broadcasted at the basically same position, the situation that the driver forgets about the prompt information of the electronic eye when the vehicle travels to the electronic eye exists, and the broadcast also belongs to invalid electronic eye broadcast.
In the embodiment of the application, the technical means of dynamically adjusting the broadcasting distance of the electronic eye according to the real-time vehicle speed is adopted for solving the problems, and whether the early warning information of the electronic eye is broadcasted or not is determined according to the dynamically determined broadcasting distance, so that the reasonable adjustment of the broadcasting position of the electronic eye is realized, and the electronic eye broadcasts and reports the information to effectively prompt a user to pay attention to the corresponding electronic eye.
Fig. 2 is a flowchart of an electronic eye broadcasting method provided in an embodiment of the present application, where the method is based on the application scenario shown in fig. 1, and with reference to fig. 2, the method includes:
the real-time running speed of the vehicle can be obtained in the following mode:
1. obtaining current GPS position data of the vehicle;
2. acquiring vehicle-mounted pulse data;
3. according to the data calculation of the accelerometer, the situation is suitable for the situation that GPS signals are lost;
4. directly through the vehicle's OBD interface.
In the embodiment of the application, when obtaining the peripheral electronic eye that treats the report of vehicle, can acquire the peripheral electronic eye that presets the distance within range of vehicle earlier, then follow in the electronic eye who acquires, confirm that the relation of the direction of travel of working direction and vehicle satisfies the electronic eye of report condition as the electronic eye that treats the report. Wherein, can regard as the electronic eye that waits to report as following broadcast condition is satisfied in the electronic eye who obtains:
the electronic eye is positioned in front of the vehicle running direction, and the vehicle running direction is opposite to the electronic eye working direction.
For example, the two end points of a section of road are respectively a and B, the vehicle driving direction is from a to B, and the electronic eye working direction is from B to a, at this time, the vehicle driving direction and the electronic eye working direction are opposite.
Therefore, the broadcasting of the electronic eyes provided by the embodiment of the invention includes broadcasting the electronic eyes in front of the vehicle driving direction, and can also include broadcasting the electronic eyes in back of the vehicle driving direction according to actual requirements. In the following embodiments of the present application, description will be given only by taking an example of broadcasting an electronic eye ahead of a vehicle in a traveling direction.
in the embodiment of the application, the distance adjustment value corresponding to the real-time running speed of the vehicle can be acquired in a preset distance adjustment value configuration table, then the preset basic broadcast distance of the electronic eye of the type is acquired according to the type of the electronic eye to be broadcast, and then the sum of the basic broadcast distance and the distance adjustment value is determined to be the real-time broadcast distance of the electronic eye to be broadcast.
In the preset distance adjustment value configuration table, the following method may be adopted to obtain the distance adjustment value corresponding to the real-time running speed of the vehicle:
acquiring a speed interval to which the real-time running speed of the vehicle belongs in a preset distance adjustment value configuration table; and determining the distance adjustment value corresponding to the speed interval as the distance adjustment value corresponding to the real-time running speed of the vehicle.
Table 1 is an example of a distance-adjustment value configuration table according to an embodiment of the present invention, and symbol-represents that no limitation is imposed on the upper limit of speed. The distance adjusting values of different vehicle speed intervals in the table are linearly increased in the sequence from small to large according to the vehicle speed intervals. In practical applications, the engineering practitioner may set the distance adjustment value according to actual needs, and the example shown in table 1 should not be construed as a limitation to the embodiment of the present invention.
| Vehicle speed (km/h) | Distance adjustment value (m) |
| (0,60] | 0 |
| (60,90] | a |
| (90,∽) | 2a |
TABLE 1
in the embodiment of the application, a first distance from a real-time geographic position of a vehicle to a starting point of a road where the vehicle is located can be obtained first, then the electronic eye to be broadcasted reaches a second distance from the starting point of the road, a difference value between the second distance and the first distance is obtained, if the difference value is a positive value, the difference value is smaller than or equal to a real-time broadcasting distance of the electronic eye, and then a real-time broadcasting distance range that the vehicle drives into the corresponding electronic eye is determined.
The technical solutions provided by the embodiments of the present invention are described below with reference to specific examples. Assuming that the basic broadcast distance X obtained according to the type of the electronic eye is 200m, and a shown in table 1 is 200m, the embodiment of the present invention calculates the broadcast distance of the electronic eye according to the real-time vehicle traveling speed before the vehicle passes through the electronic eye, for example, the real-time vehicle traveling speed is kept greater than 90km/h, and the broadcast distance is (X +2a) m shown in table 1 is 600 m; after the distance of 600 meters is obtained, if the distance from the vehicle to the electronic eye is greater than 600 meters and the obtained real-time running speed of the vehicle starts to be lower than 60km/h, the broadcast distance of the electronic eye is recalculated, and according to table 1, the broadcast distance x is 200 m.
According to the distance, the running speed of the vehicle can be changed continuously, for the distance situation, if the vehicle runs to a distance between the electronic eyes (600m, 200m), the speed of the vehicle is increased to be more than 90km/h, at the moment, the vehicle is already located in a broadcasting range of 600m, and in order to avoid missing the report, the electronic eyes need to be broadcasted immediately. Therefore, in a preferred embodiment of the present invention, the specific step of determining whether the vehicle enters the broadcast distance range of the corresponding electronic eye is as follows: and judging whether the vehicle enters a broadcast distance range corresponding to the real-time running speed of the vehicle of the corresponding electronic eye.
The electronic eye broadcasting method provided by the embodiment of the invention dynamically determines the broadcasting distance of the electronic eye according to the driving speed of the vehicle and the type of the electronic eye, and triggers the broadcasting of the electronic eye when the electronic eye is located in the broadcasting distance range, so that the early warning information of the electronic eye can be broadcasted at a proper time.
According to the electronic eye broadcasting method, a first distance from a real-time geographical position of a vehicle to a starting point of a road where the vehicle is located and a second distance from an electronic eye to be broadcasted to the starting point of the road are obtained along a navigation guide path. The manner of obtaining the above two distances is described below in two cases.
Fig. 3 is a broadcasting scene of a vehicle and an electronic eye to be broadcasted on the same road. In this scenario, along the navigation guidance path, the distances from the electronic eye and the vehicle to the road starting point are acquired based on the same road starting point.
Fig. 4 provides a scene that the electronic eye to be broadcasted and the vehicle are not on the same Road, in this scene, along the navigation guidance path, the distance from the electronic eye to the starting point of the Road where the vehicle is located is (Road 1-cartofnod) + Road2+ (safetofnod), wherein, the length of the Road where the vehicle is located (Road1), the length of the navigation guidance path connecting the Road where the vehicle is located and the Road where the electronic eye is located (Road2), the length of the Road where the electronic eye is located (Road3), the distance from the vehicle to the starting point of the current driving Road (cartefnod), and the distance from the electronic eye to the starting point of the current driving Road (safetofnod).
Fig. 5 is a structural diagram of an electronic eye-broadcasting device according to an embodiment of the present application, where the device is configured to execute an electronic eye-broadcasting method according to an embodiment of the present application, and with reference to fig. 5, the device includes:
the electronic eye acquiring unit 501 is used for acquiring the real-time running speed of a vehicle and an electronic eye to be broadcasted around the vehicle;
a broadcast distance determining unit 502, configured to obtain a real-time broadcast distance of the electronic eye to be broadcast according to the real-time running speed of the vehicle and the type of the electronic eye to be broadcast, which are obtained by the electronic eye obtaining unit 501;
and the broadcasting unit 503 is configured to judge whether the vehicle enters the real-time broadcasting distance range of the corresponding electronic eye determined by the broadcasting distance determining unit 502, and if so, broadcast the electronic eye.
Optionally, the electronic eye obtaining unit 501 specifically includes:
the electronic eye acquiring subunit is used for acquiring the electronic eyes within a preset distance range around the vehicle;
and the electronic eye determining subunit is used for determining the electronic eye of which the relation between the working direction and the driving direction of the vehicle meets the broadcasting condition from the electronic eyes acquired by the electronic eye acquiring subunit as the electronic eye to be broadcasted.
Optionally, the broadcast distance determining unit 502 includes:
the adjustment value obtaining subunit is configured to obtain, in a preset distance adjustment value configuration table, a distance adjustment value corresponding to the real-time running speed of the vehicle;
the basic broadcasting distance obtaining subunit is used for obtaining a preset basic broadcasting distance of the electronic eye of the type according to the type of the electronic eye to be broadcasted;
and the broadcast distance determining subunit is used for determining the basic broadcast distance and the sum of the distance adjusting values as the real-time broadcast distance of the electronic eye to be broadcast.
Optionally, the adjustment value obtaining subunit specifically includes:
the speed interval acquisition module is used for acquiring a speed interval to which the real-time running speed of the vehicle belongs in a preset distance adjustment value configuration table;
and the adjusting value determining module is used for determining the distance adjusting value corresponding to the speed interval as the distance adjusting value corresponding to the real-time running speed of the vehicle.
Optionally, the broadcasting unit 503 includes:
the first distance obtaining subunit is used for obtaining a first distance from the real-time geographic position of the vehicle to the starting point of the road where the vehicle is located;
the second distance obtaining subunit is used for obtaining a second distance from the electronic eye to be broadcasted to the starting point of the road;
and the broadcast determining subunit is used for acquiring a difference value between the second distance and the first distance, and if the difference value is a positive value and is less than or equal to the real-time broadcast distance of the electronic eye, determining the real-time broadcast distance range of the vehicle entering the corresponding electronic eye.
Those of skill would further appreciate that the various illustrative objects and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied in hardware, a software module executed by a processor, or a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The above-mentioned embodiments, objects, technical solutions and advantages of the present application are described in further detail, it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present application, and are not intended to limit the scope of the present application, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present application should be included in the scope of the present application.
Claims (8)
1. An electronic eye-broadcasting method, the method comprising:
acquiring the real-time running speed of a vehicle and an electronic eye to be broadcasted around the vehicle;
before the vehicle does not pass through the electronic eye to be broadcasted, obtaining the real-time broadcasting distance of the electronic eye to be broadcasted according to the real-time running speed of the vehicle and the type of the electronic eye to be broadcasted; if the real-time running speed changes, re-determining the real-time broadcasting distance;
judging whether the vehicle drives into the real-time broadcast distance range of the corresponding electronic eye, and if so, broadcasting the electronic eye; the real-time broadcasting distance range comprises a real-time broadcasting distance which is less than or equal to the real-time broadcasting distance;
according to the real-time speed of traveling of vehicle and the type of the electronic eye of waiting to report, obtain the real-time distance of reporting of the electronic eye of waiting to report specifically includes:
acquiring a distance adjustment value corresponding to the real-time running speed of the vehicle in a preset distance adjustment value configuration table;
acquiring a preset basic broadcasting distance of the electronic eye of the type according to the type of the electronic eye to be broadcasted;
and determining the basic broadcasting distance and the sum of the distance adjusting values as the real-time broadcasting distance of the electronic eye to be broadcasted.
2. The method according to claim 1, wherein the step of obtaining the electronic eyes to be broadcasted around the vehicle specifically comprises:
acquiring an electronic eye in a preset distance range around a vehicle;
and determining the electronic eye with the relation between the working direction and the driving direction of the vehicle meeting the broadcasting condition as the electronic eye to be broadcasted from the acquired electronic eyes.
3. The method according to claim 1, wherein the obtaining of the distance adjustment value corresponding to the real-time running speed of the vehicle in a preset distance adjustment value configuration table specifically comprises:
acquiring a speed interval to which the real-time running speed of the vehicle belongs in a preset distance adjustment value configuration table;
and determining the distance adjustment value corresponding to the speed interval as the distance adjustment value corresponding to the real-time running speed of the vehicle.
4. The method according to claim 1 or 2, wherein the step of judging whether the vehicle enters the real-time broadcast distance range of the corresponding electronic eye specifically comprises the following steps:
acquiring a first distance from a real-time geographical position of a vehicle to a starting point of a road where the vehicle is located;
acquiring a second distance from the electronic eye to be broadcasted to the starting point of the road;
and acquiring a difference value between the second distance and the first distance, and if the difference value is a positive value and the difference value is smaller than or equal to the real-time broadcast distance of the electronic eye, determining the real-time broadcast distance range of the vehicle entering the corresponding electronic eye.
5. An electronic eye-broadcasting device, the device comprising:
the electronic eye acquisition unit is used for acquiring the real-time running speed of a vehicle and the electronic eyes to be broadcasted around the vehicle;
the broadcast distance determining unit is used for obtaining the real-time broadcast distance of the electronic eye to be broadcast according to the real-time running speed of the vehicle and the type of the electronic eye to be broadcast, which are obtained by the electronic eye obtaining unit, before the vehicle does not pass through the electronic eye to be broadcast; if the real-time running speed changes, re-determining the real-time broadcasting distance;
the broadcasting unit is used for judging whether the vehicle drives into the real-time broadcasting distance range of the corresponding electronic eye determined by the broadcasting distance determining unit, and if so, broadcasting the electronic eye; the real-time broadcasting distance range comprises a real-time broadcasting distance which is less than or equal to the real-time broadcasting distance;
broadcast the distance and confirm the unit and include:
the adjustment value obtaining subunit is configured to obtain, in a preset distance adjustment value configuration table, a distance adjustment value corresponding to the real-time running speed of the vehicle;
the basic broadcasting distance obtaining subunit is used for obtaining a preset basic broadcasting distance of the electronic eye of the type according to the type of the electronic eye to be broadcasted;
and the broadcast distance determining subunit is used for determining the basic broadcast distance and the sum of the distance adjusting values as the real-time broadcast distance of the electronic eye to be broadcast.
6. The apparatus of claim 5, wherein the electronic eye acquisition unit specifically comprises:
the electronic eye acquiring subunit is used for acquiring the electronic eyes within a preset distance range around the vehicle;
and the electronic eye determining subunit is used for determining the electronic eye of which the relation between the working direction and the driving direction of the vehicle meets the broadcasting condition from the electronic eyes acquired by the electronic eye acquiring subunit as the electronic eye to be broadcasted.
7. The apparatus of claim 5, wherein the adjustment value obtaining subunit specifically includes:
the speed interval acquisition module is used for acquiring a speed interval to which the real-time running speed of the vehicle belongs in a preset distance adjustment value configuration table;
and the adjusting value determining module is used for determining the distance adjusting value corresponding to the speed interval as the distance adjusting value corresponding to the real-time running speed of the vehicle.
8. The apparatus according to claim 5 or 6, wherein the broadcasting unit comprises:
the first distance obtaining subunit is used for obtaining a first distance from the real-time geographic position of the vehicle to the starting point of the road where the vehicle is located;
the second distance obtaining subunit is used for obtaining a second distance from the electronic eye to be broadcasted to the starting point of the road;
and the broadcast determining subunit is used for acquiring a difference value between the second distance and the first distance, and if the difference value is a positive value and is less than or equal to the real-time broadcast distance of the electronic eye, determining the real-time broadcast distance range of the vehicle entering the corresponding electronic eye.
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| CN101408438A (en) * | 2008-11-11 | 2009-04-15 | 凯立德欣技术（深圳）有限公司 | Voice prompting method, apparatus and navigation equipment |
| CN103292814A (en) * | 2012-02-29 | 2013-09-11 | 北京四维图新科技股份有限公司 | Navigation prompting method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1996425A (en) * | 2006-12-22 | 2007-07-11 | 凯立德欣技术（深圳）有限公司 | A GPS traffic safety information prompting device in navigation system, device, and apparatus therefor |
| CN101713665B (en) * | 2009-12-15 | 2013-05-29 | 深圳市凯立德科技股份有限公司 | Navigation prompting method and navigation prompting device |
| CN105006166A (en) * | 2015-08-14 | 2015-10-28 | 太仓苏易信息科技有限公司 | Intelligent road condition broadcasting system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101408438A (en) * | 2008-11-11 | 2009-04-15 | 凯立德欣技术（深圳）有限公司 | Voice prompting method, apparatus and navigation equipment |
| CN103292814A (en) * | 2012-02-29 | 2013-09-11 | 北京四维图新科技股份有限公司 | Navigation prompting method and device |
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