JP5558083B2 - POSITION INFORMATION ACQUISITION SYSTEM, POSITION INFORMATION ACQUISITION DEVICE, POSITION INFORMATION ACQUISITION METHOD - Google Patents

Description

  The present invention relates to a position information acquisition system, a position information acquisition apparatus, and a position information acquisition method, and in particular, a position information acquisition system and a position information in which a user inputs information by voice and responds to the input information by voice. The present invention relates to an acquisition device and a position information acquisition method.

  Currently, there is a service that automatically analyzes a user's voice input from a mobile communication device such as a mobile phone and searches for and acquires information requested by the user. In such a service, the position of the mobile communication device is specified using the positioning function of the mobile communication device, and information to be provided to the user is selected from the specified location. In such a technique, the position of the mobile communication device is generally regarded as the position of the user.

  As a prior art of the above-described service, for example, Patent Document 1 is cited. In Patent Document 1, when a user inputs a voice message from a mobile communication device, “I want to go to a concert, but do not do it somewhere? (Global Positioning System) describes that a user's current position is specified using a device.

Further, Patent Document 1 describes that the current time and the current position from which the user is moving toward the start time of the concert information, and the extracted information is provided to the user by voice.
By the way, the measurement error of the GPS device varies depending on the radio wave condition of the place where the position is measured (positioning place). If the measurement error is large, the user's position cannot be obtained accurately. For this reason, there is a conventional technique in which position information acquired by the GPS device is corrected by the user himself / herself.

  As conventional techniques for correcting the current position of a mobile communication device acquired by a GPS device, for example, there are inventions described in Patent Literature 2 and Patent Literature 3. In the positioning device described in Patent Document 2, map elements included in the error range of the position information obtained by positioning are displayed on a map. And among the displayed map elements, the map element designated by the user is displayed in a different display form from the other map elements. According to Patent Literature 2, the user can correct the position of the mobile communication device based on the displayed map element.

Moreover, in the navigation apparatus described in Patent Document 3, the user refers to the map and confirms the current position of the mobile communication device displayed on the map. When the current position on the displayed map is different from the actual current position, the user inputs information such as “upper road” or “right road” into the navigation device. The navigation device corrects the current position of the mobile communication device according to the information inputted by voice, and matches the current position on the map with the actual current position.
According to such a conventional technique, the user can correct the current position of the mobile communication device acquired by the GPS device, and acquire appropriate information based on the corrected accurate position information.

JP-A-10-283362 JP 2002-357448 A JP 2002-350158 A

However, in any of the above-described prior art mobile communication device position corrections, the user must input information necessary for correction by looking at the map displayed on the screen of the device. For this reason, in Patent Document 2 and Patent Document 3, when correcting the position of the mobile communication device in a series of processes for inputting a voice and receiving a service, it is necessary to view a display screen of a mobile phone or the like.
Viewing the display screen while moving is undesirable because it can distract the user's attention.

Further, the service described in Patent Document 1 is highly convenient because the user can visually move around while receiving information providing service by voice. Therefore, viewing the screen of the mobile communication device in the process of receiving service provision impairs the convenience of the service.
The present invention has been made in view of the above points, and allows a user to correct position information acquired by a positioning device such as a GPS device without the user viewing a map displayed on the mobile communication device. An object of the present invention is to provide a position information acquisition system, a position information acquisition device, and a position information acquisition method.

In order to solve the above problems, a position information acquisition system according to claim 1 of the present invention includes a mobile communication device (for example, the mobile phone 201 shown in FIG. 2) for inputting information by voice and the mobile communication device. A position information acquisition apparatus (for example, the server shown in FIG. 2) provided with a voice analysis unit (for example, the voice recognition server apparatus 1 shown in FIG. 2) that analyzes the information inputted by voice and identifies a target included in the information. A position information acquisition system including a device group 4), wherein the mobile communication device includes positioning means for positioning a current position of the device itself, and positioning information obtained by the positioning is transmitted to the position information acquisition device. The position information acquisition device transmits a correction processing means (for example, correcting the positioning information measured by the mobile communication device based on the target specified by the voice analysis unit) Includes position correction server apparatus 202) shown in FIG. 2, the correction processing means, based on an error relating to the positioning information, existing range specifying means for specifying the existence range of the mobile communication device can be present (e.g., FIG. 3 Error determining unit 301, user presence range specifying unit 302), means for obtaining a user viewing range in which the target specified by the voice analysis unit is visible, the presence range , A viewable area specifying means (for example, the user position correction processing unit 303 shown in FIG. 3) for specifying a viewable area that is a range that overlaps the user viewable range, and the current position of the mobile communication device indicated by the positioning information. And correction means (for example, a user position correction processing unit 303 shown in FIG. 3) for correcting the position to be included in the visible area.

  According to the first aspect, the position information acquisition device specifies a range that is within a range corresponding to the error including the measured position and that allows the input target to be visually recognized. The positioning information can be corrected according to the range to include. For this reason, the positioning error of positioning means such as GPS can be corrected by information that can be visually recognized by the user. Further, in this correction, the user only has to input a target that can be visually recognized by speaking, so that the user does not need to look at the display screen of the mobile communication device during the correction process. Therefore, the invention of claim 1 can provide a position information acquisition system in which the user can correct the position information acquired by the GPS device or the like without the user viewing the map displayed on the device.

The position information acquisition device (for example, the server device group 4 shown in FIG. 2) described in claim 2 of the present invention corrects the positioning information obtained by positioning the position of the mobile communication device (for example, FIG. 2). 2 is a position information acquisition apparatus including the position correction server apparatus 202 shown in FIG. 2, which analyzes information input by voice by the mobile communication apparatus and identifies a target included in the information (for example, FIG. 2). And the correction processing means is an existence range specifying means (for example, shown in FIG. 3) for specifying an existence range in which the mobile communication device can exist based on an error relating to the positioning information. error judging unit 301, the user existence range identification unit 302), means for the target specified by the speech analysis unit acquires a user viewing content is in the range visible, the existence range , (User position correction processing unit 303 shown in example FIG. 3) viewable area specifying unit operable and a user viewable to identify the visible area is a range that overlaps, the mobile communication apparatus indicated by the previous SL positioning information Correction means for correcting the current position to a position included in the viewable area.

  According to such a second aspect, the position information acquisition device identifies a range that is within a range corresponding to an error including the measured position and that allows the input target to be visually recognized. The positioning information can be corrected according to the range to include. For this reason, the positioning error of positioning means such as GPS can be corrected by information that can be visually recognized by the user. Further, in this correction, the user only has to input a target that can be visually recognized by speaking, so that the user does not need to look at the display screen of the mobile communication device during the correction process. Therefore, the invention of claim 1 can provide a position information acquisition device that allows the user to correct the position information acquired by the GPS device or the like without the user viewing a map displayed on the device.

The positional information acquisition device according to claim 3 of the present invention is the positional information acquisition device according to claim 2, wherein when there are a plurality of the targets specified by the voice analysis unit, the viewable area specifying means An area that overlaps a plurality of visible ranges of a plurality of targets specified by the voice analysis unit is specified as a visible area. According to such a third aspect, since the current position of the user can be corrected using a plurality of targets, the accuracy of the position of the user determined by the correction can be improved.

  According to a fourth aspect of the present invention, in the positional information acquisition device according to the second or third aspect, the voice analysis unit also analyzes the information input by voice to identify the direction in which the target can be seen, The viewable area specifying means excludes a part of the specified viewable area from the viewable area based on the direction in which the target can be seen. According to the fourth aspect, it is possible to further narrow the viewable area once specified by the direction in which the target can be seen. For this reason, the accuracy of the position of the user determined by the correction can be increased.

  According to Claim 5 of the present invention, in the position information acquisition apparatus according to Claim 2 or 3, the mobile communication indicated by the positioning information when the correction processing unit has an error related to the positioning information smaller than a predetermined value. The present invention is characterized in that the current position of the apparatus is not corrected. According to such a fifth aspect, the correction process can be omitted when the correction is not necessary, and the processing efficiency of the present invention can be improved.

  According to a sixth aspect of the present invention, in the position information acquisition device according to any one of the second, third, and fifth aspects, the correction processing unit may determine the current position of the mobile communication device indicated by the positioning information. It is characterized by correcting to the center of gravity of the visible area. According to such a sixth aspect, it is possible to suppress a difference between an accurate current position of the mobile communication device and an estimated current position in the visible area.

According to a seventh aspect of the present invention, there is provided a positional information acquisition method for correcting positioning information obtained by positioning a position of a mobile communication device based on a target included in information inputted by voice by the mobile communication device. A location information acquisition method executed by a location information acquisition device including means for specifying an existence range in which the mobile communication device can exist based on an error related to the positioning information (for example, FIG. 7). Step S3), a step of acquiring a user viewing range in which the target included in the information input by voice is visible, and a range in which the existence range and the user viewing range overlap . and (step S6 illustrated in example FIG. 7) viewable area specifying step of specifying a certain visible area, the current position of the mobile communication device in which the positioning information indicates Characterized in that it comprises a a (step S8 shown in example FIG. 7) the position correction step of correcting a position included in the viewable area.
According to the seventh aspect of the present invention, it is possible to provide a position information acquisition method in which the user can correct the position information acquired by the GPS device or the like without the user looking at the map displayed on the device.

  According to the present invention, the user can correct the positioning information indicating his / her current position by speaking while watching the surrounding situation. Therefore, the user does not need to look at the display screen of the device when correcting the positioning information, and the convenience of the position information acquisition system, the position information acquisition device, and the position information acquisition method can be improved.

It is a figure for demonstrating an example of the service with which one Embodiment of this invention is applied. It is a figure for demonstrating the outline | summary of the positional infomation acquisition system of one Embodiment of this invention. It is a functional block diagram for demonstrating the structure of the position correction server apparatus 202 shown in FIG. It is a figure for demonstrating the process which narrows down the visually recognizable area of one Embodiment of this invention. It is a figure for demonstrating the process which judges whether the positioning information of one Embodiment of this invention is correctable. It is a figure for demonstrating correction | amendment of the positioning information of one Embodiment of this invention. It is a flowchart for demonstrating operation | movement of the positional infomation acquisition system of one Embodiment of this invention. It is the figure which showed on the map the user's present position based on positioning information of Example 1 of this invention, and a user presence range. It is the figure which showed the user visual recognition range which overlaps with a user presence range of the specific example 1 of this invention. It is a figure for demonstrating the process which specifies the user visible area of the specific example 1 of this invention. It is a figure which shows the visually recognizable area of the other target object of the specific example 1 of this invention. It is a figure which shows the state in which the visually recognizable area of two targets of the specific example 1 of this invention overlapped. It is a figure for demonstrating the process of determining a user's present position and its error from the visible area of the specific example 1 of this invention. It is a figure for demonstrating the effect acquired by the specific example 1 of this invention. It is a figure for demonstrating the specific example 2 of this invention.

Hereinafter, an embodiment of a position information acquisition system, a position information acquisition device, and a position information acquisition method according to the present invention will be described with reference to the drawings.
(Prerequisite technology)
Prior to the description of the embodiments of the present invention, services to which the present embodiments are applied will be described.
FIG. 1 is a diagram for explaining an example of a service to which the present embodiment is applied. The service shown in FIG. 1 reserves a Shinkansen ticket in accordance with voice input using a mobile phone. In such a service, a user calls a predetermined telephone number using his / her mobile phone. For example, a user currently in Tokyo inputs a voice saying “I want to go to Sendai now”. The input voice is transmitted to a server device managed by a service provider.

Further, the position of the mobile phone is determined based on a signal received from a GPS satellite by a receiver of a GPS device built in the mobile phone. The positioning information indicating the specified position is transmitted to the server device described above.
In the example illustrated in FIG. 1, the position information acquisition system includes three server devices: a voice recognition server device 1, a scenario server device 2, and a Web server device 3. The input voice is analyzed by the voice recognition server device 1. The scenario server device 2 reads data (scenario) used for the conversation with the user based on the information obtained by the analysis of the speech recognition server device 1, and responds to the user with synthesized speech.

The Web server device 3 acquires information required by the user through, for example, the Internet line based on information obtained by the analysis of the voice recognition server device 1. In addition, the Web server device 3 makes a reservation for a Shinkansen ticket according to a user's request, for example, through an Internet line.
At this time, the Web server device 3 specifies the nearest station for the position of the mobile phone based on the positioning information. Then, it searches for a Shinkansen flight that can be reserved in consideration of the time and route from the nearest station to the station where the Shinkansen can be boarded. For this reason, in the service illustrated in FIG. 1, if the positioning information obtained by the GPS device is inaccurate, it may not be possible to provide information on Shinkansen flights according to the user's wishes.

  For example, if it is erroneously determined that the user's nearest station is another station far from the actual nearest station, a Shinkansen ticket that departs later than the originally booked Shinkansen ticket may be reserved. obtain. Accordingly, in such a system, it can be said that increasing the accuracy of positioning information is highly important in providing accurate information to the user.

(System overview)
FIG. 2 is a diagram for explaining the outline of the position information acquisition system of this embodiment. As illustrated, the position information acquisition system according to the present embodiment includes a mobile communication device carried by a user and a server device group 4 including a position correction server device 202. In the present embodiment, the mobile communication device is a mobile phone 201. Note that the mobile communication device of the present embodiment is not limited to a mobile phone, and any device can be applied as long as it is a portable device having a communication function.

The cellular phone 201 and the server device group 4 are connected by a public switched telephone network (PSTN) PS, an Internet I, and a 3G (3rd Generation) network G.
The mobile phone 201 is provided with a GPS receiver that receives radio waves from the GPS satellite 204 and measures the position of the mobile phone 201. For such a receiver of the mobile phone 201, since a mobile phone having a GPS function is well known, illustration of the GPS receiver and further description thereof are omitted. In the present embodiment, the GPS satellite 204 and the GPS receiver are collectively referred to as a GPS function hereinafter.

The server device group 4 includes the position correction server device 202 in addition to the voice recognition server device 1, the scenario server device 2, and the Web server device 3 shown in FIG. The position correction server device 202 is a server device that corrects the position of the mobile phone measured by the GPS device of the present embodiment.
In the above configuration, voice information is input to the mobile phone 201 when the user makes a call. Further, the voice recognition server device 1 included in the server device group 4 can analyze information input by voice by the mobile phone 201 and specify a target included in the information.

(Mobile phone)
The mobile phone 201 transmits information related to the position measured by the GPS function (hereinafter referred to as positioning information) to the position correction server device 202 at regular time intervals. At this time, the mobile phone 201 transmits the positioning level information indicating the positioning error of the positioning information to the position correction server device 202 together with the positioning information.
1. Positioning Level Information Table 1 is a table for explaining positioning level information. The positioning level information indicates one of the positioning levels “1”, “2”, and “3” as illustrated. An error is associated with each of the positioning levels “1” to “3”, and the larger the numerical value indicated by the positioning level, the larger the error.

  The positioning level described above can be realized by a function called a position positioning engine that is generally provided in a mobile phone, for example. The position positioning engine is a function for determining the latitude and longitude positioning levels in accordance with preset determination criteria. Since the positioning engine has a known configuration, further explanation will be omitted.

(Server device)
FIG. 3 is a functional block diagram for explaining the configuration of the position correction server apparatus 202 shown in FIG. The position correction server device 202 specifies the range in which the mobile phone is present when the error determined by the error determination unit 301 and the error determination unit 301 are larger than a predetermined value. And a user position correction processing unit 303 that corrects a range specified by the user presence range specifying unit 302 (hereinafter referred to as a user presence range) and obtains the position of the mobile phone. In the present embodiment, hereinafter, the user presence range of the mobile phone is regarded as the user presence range of the user, and the position of the mobile phone is regarded as the user position.

  In addition, the position correction server device 202 includes a database 304. The database 304 stores map data 304a and visual information data 304b. The visual information data 304b is information that defines on the map a range in which structures such as buildings, signs, signboards, bridges, and the like that can be targets described on the map represented by the map data can be visually recognized. . The visual information data 304b will be illustrated and described later.

1. Error Determination Unit The error determination unit 301 determines an error in positioning information from the positioning level transmitted from the mobile phone 201. In the error determination unit 301, a specific range corresponding to the positioning level shown in Table 1 is set in advance. Further, it is determined that the error is small when the transmitted positioning level is equal to or lower than the predetermined positioning level, and the error is large when the transmitted positioning level is larger than the predetermined positioning level.

2. User presence range specifying unit The user presence range specifying unit 302 specifies the user presence range based on the error corresponding to the positioning level. In this embodiment, for example, when the positioning level is “2” and the horizontal error is 50 m or more and less than 300 m, a circle with a radius of 300 m centering on the position of the mobile phone indicated by the positioning information is set as the specific range. . When the horizontal error is 300 m or more, the specific range is set as an upper limit range set in advance by the user presence range specifying unit 302. The upper limit range is set, for example, as a circle centered on the current position of the mobile phone indicated by the positioning information and having a set upper limit radius.

3. User position correction processing unit The user position correction processing unit 303 instructs the scenario server device 2 to play voice guidance on the mobile phone. In this voice guidance, the names of buildings (signs, buildings, signs, posts, bridges, etc. (hereinafter referred to as targets) that can be seen by the user and the direction in which the target can be seen with respect to the user's direction of travel are input by voice. It is a thing to encourage. As a specific example of the voice guidance, for example, "Tell me the target that can be seen from there, and from which direction can the target be seen from the direction of travel?"

  For such voice guidance, for example, the user answers by voice such as “Convenience store L is visible on the right side” or “Post box is visible”. The user's answer is analyzed by the voice recognition server device 1 and converted into information such as “convenience store L” and “right side”. The user position correction processing unit 303 acquires information about the positions such as “convenience store L” and “right side” after conversion. In the present embodiment, any one of “up”, “down”, “right”, and “left” may be input as information about the direction in which the target can be seen.

  Next, the user position correction processing unit 303 searches the map data 304a of the database 304, and determines whether or not the target is included in the user presence range specified by the user presence range specification unit 302. When the target is included in the user presence range, the visual recognition information data 304b is searched, and the user visual recognition range where the target is visible is extracted. In addition, a user visual recognition range is an area which prescribed | regulated the range which a target can visually recognize on a map.

Furthermore, the user position correction processing unit 303 determines whether there is an area where the user presence range and the extracted user viewing range overlap. When there is an area where the user presence range and the user viewing range overlap, the user position correction processing unit 303 sets the area where the user viewing range and the user presence range overlap as a viewable area. When the user answers a plurality of targets, an area where the user viewing range and the user presence range of the plurality of targets overlap is set as a viewable area.
When the user also answers the direction in which the target can be seen according to the voice guidance, the user position correction processing unit 303 further narrows down the visible area based on the direction. Note that the user position correction processing unit 303 receives the transmitted positioning information and accumulates it in time series, thereby grasping the moving direction of the mobile phone.

FIGS. 4A to 4D are diagrams for explaining processing for narrowing down the visible area A based on the direction in which the target can be seen, and obtaining a more visible visible area. In any of FIGS. 4A to 4D, M shown in the viewable area A indicates a target. Moreover, the arrow line on each figure has shown the advancing direction of the user.
FIG. 4A shows a visible area when the user responds to the voice guidance that “a target can be seen later”. According to the example shown in FIG. 4A, the viewable area A is limited to an area ahead of the target M when the traveling direction of the user is the front. As a result, the area AB of the visible area A is excluded from the visible area A.

  FIG. 4B shows a visible area when the user responds to the voice guidance that “a target can be seen in front”. According to the example shown in FIG. 4B, the viewable area A is limited to an area behind the target M when the traveling direction of the user is the front. As a result, the area AF of the visible area A is excluded from the visible area A. FIG. 4C shows a viewable area in the case where the user responds to the voice guidance “You can see the target on the left”. According to the example shown in FIG. 4C, the viewable area A is limited to an area on the left side of the target M when the traveling direction of the user is the front. As a result, the area AL of the visible area A is excluded from the visible area A.

  FIG. 4D shows a viewable area when the user responds to the voice guidance “You can see the target on the right”. According to the example shown in FIG. 4D, the viewable area A is limited to an area on the right side of the target when the traveling direction of the user is the front. As a result, the area AR of the visible area A is excluded from the visible area A. In addition, when there are a plurality of visible areas, the respective visible areas are narrowed down as described above, and an area where the visible areas after being narrowed down is the visible area.

Further, the user position correction processing unit 303 obtains the position of the mobile phone from the viewable area obtained as described above, and corrects the positioning information transmitted from the mobile phone. Hereinafter, processing for obtaining the position of the mobile phone will be described.
FIG. 5 is a diagram for explaining processing in which the user position correction processing unit 303 determines whether or not positioning information can be corrected prior to correction of positioning information. When the viewable area A is specified, the user position correction processing unit 303 obtains the center of gravity o of the viewable area A. Then, a circle c1 having a minimum radius including the viewable area A around the center of gravity o is assumed.

In the present specification, the center of gravity o of the viewable area A means the center of gravity of the plane figure indicating the viewable area on the map corresponding to the viewable area. Hereinafter, the “center of gravity” in this specification refers to the center of gravity of a plane figure defined on a map corresponding to a predetermined area.
In the user position correction processing unit 303, a circle c2 having a predetermined radius is set in advance. The user position correction processing unit 303 compares the circle c1 with a circle c2 having a preset radius. If the radius of the circle c1 is equal to or less than the radius of the circle c2, the positioning information measured by the GPS can be corrected. to decide.
When the positioning information can be corrected, the user position correction processing unit 303 corrects the positioning information so that the center of gravity o of the viewable area A becomes the position of the user. Further, the error range of the corrected user position is assumed to be a circle c1. At this time, as shown in FIG. 6, the radius z of the circle c1 becomes a horizontal error in the position of the user.

(Operation of location information acquisition system)
Next, the operation of the above-described position information acquisition system will be described.
FIG. 7 is a flowchart for explaining the operation of the position information acquisition system of this embodiment. The illustrated flowchart represents a process in which the position correction server apparatus 202 illustrated in FIGS. 2 and 3 corrects positioning information.
In the position information acquisition system of the present embodiment, the position correction server device receives notification of positioning information from the mobile phone (step S1). At this time, the position correction server device acquires an error of the notified positioning information based on the positioning level transmitted together with the positioning information. Then, based on the acquired error, it is determined whether or not a process for specifying the user presence range is to be performed (step S2).

  The determination in step S2 is made based on whether or not the error corresponding to the positioning level is larger than a predetermined value. When the positioning level is, for example, the positioning level 1 shown in FIG. 2, the user presence range specifying unit determines that the error is small, and the position indicated by the position information is used as the current position of the mobile phone as it is (step S2: small error). . When the positioning level is, for example, the positioning level 2 or the positioning level 3 shown in FIG. 2, the user presence range specifying unit performs a process of specifying the user presence range, assuming that the error is large (step S2: Large error, step S3).

  When the user presence range is specified in step S <b> 3, the user position correction processing unit sends voice guidance to the user via the voice recognition server device 1. In response to the voice guidance, the user inputs a voice about the name of the target, the name of the target, and the direction in which the target is visible (hearing of the target: step S4). The user position correction processing unit 303 shown in FIG. 3 searches the map data to determine whether or not the input target is included in the user presence range (step S5).

Here, in the present embodiment, when the target is not included in the user presence range, the user repeatedly hears voice guidance and prompts the user to input a voice of another target. The number of times voice guidance is repeatedly played is x times. If a target within the user presence range is not input even after x times of hearing, it is determined that the current position of the user cannot be corrected (step S9), and the process ends.
When the target is included in the user presence range, the user position correction processing unit searches the visual information data (step S5), and extracts the user visual range of the target. Then, a range in which the user presence range and the user viewing range overlap is set as a visually recognizable area (step S6).

  Next, the user position correction processing unit assumes a circle including the viewable area around the center of gravity of the viewable area, and compares this circle with a predetermined circle set in advance (step S7). In this determination, if the radius of the circle including the visible area is equal to or smaller than the radius of the predetermined circle, it is determined that the position indicated by the positioning information can be corrected (step S7: correction is possible). If the radius of the circle including the visible area is larger than the radius of the predetermined circle, it is determined that the position indicated by the positioning information cannot be corrected (step S7: correction not possible).

The determination in step S7 is repeated y times. If it is determined that the current position cannot be corrected after the determination of y times, the user position correction processing unit determines that the positioning information cannot be corrected (step S9), and ends the process. To do.
When it is determined that the current position can be corrected, the user position correction processing unit corrects the positioning information so that the center of gravity of the viewable area becomes the position of the user (step S8). Further, the smallest circle including the visible area is set as the error range of the corrected position.

  As described above, the position information acquisition apparatus according to the present embodiment allows the user to input information about the target while making a call using the mobile phone, and automatically corrects the positioning information of the mobile phone based on the input information. be able to. For this reason, the user can correct the positioning information measured by the GPS function of the mobile phone without looking at a map or the like displayed on the display of the mobile phone.

  From this, this embodiment can improve the usability of the service using the voice input by preventing the user from looking at the display while moving. Further, the positioning information can be corrected even in an environment where it is difficult to see the display screen such as a dark place. Furthermore, a child who cannot read the map or the like, or an elderly user who is difficult to see the map because the symbols and characters of the map are small, can easily correct the positioning information.

(Concrete example)
Hereinafter, specific example 1 and specific example 2 of the first embodiment described above will be described. In this specific example 1 and specific example 2, the mobile phone is referred to as a higher-level mobile communication device.
1 Example 1
In specific example 1, a process of correcting the current position of the user using the position information acquisition system of the present embodiment described above will be specifically described.
8, the user existence range g for the current position P and the current position P of the user based on the positioning information transmitted from the mobile communication device is a diagram showing on the map. The user presence range g is when the horizontal error is 100 m, and is represented as a circle with a radius of 100 m centered on the current position P. Moreover, the arrow line d shown in the figure has shown the user's advancing direction.

The user position correction processing unit 303 illustrated in FIG. 3 plays voice guidance via the scenario server and interviews the user regarding the target and the direction in which the target can be seen. As a result, in Specific Example 1, a response from the user saying “Convenience store K is visible on the right side” was obtained. The user position correction processing unit searches the map data in the database, and determines whether or not “convenience store K” is included in the user presence range.
When the “convenience store K” is included in the user presence range, the user position correction processing unit searches the visual information data. And the user visual recognition range of convenience store K is extracted.

FIG. 9 is a diagram showing the user viewing range of the convenience store K that overlaps the user presence range g . In the first specific example, there are convenience stores K601 and 602 in the user existence range g . The area 701a is a user viewing range of the convenience store K601 that overlaps with the user presence range g, and is a visible area of the convenience store K601. The areas 702a and 702b are the user viewing range of the convenience store K602 that overlaps the user presence range g, and are the visible area of the convenience store K602. The area 701a and the areas 702a and 702b do not overlap each other.

FIG. 10 is a diagram for explaining a process of specifying a user-visible area. In the example of FIG. 10, the areas 701a, 702a, and 702b shown in FIG. 9 are narrowed down based on the information “to the right”. As a result of the narrowing down, as shown in the figure, the user-visible area of the convenience store K601 is an area 701b. In addition, the user-visible area of the convenience store K602 is an area 702a.
In the above processing, since the visible area could not be specified as one, the server device group sends voice guidance to the mobile communication device again and prompts the user to input the target voice. In the first specific example, according to the voice guidance, the user inputs a voice saying “Akasaka V Building is visible on the left side”.

FIG. 11 is a diagram showing a visible area of the Akasaka V Building 603. Areas 703a and 703b shown in the figure are user viewing ranges of the Akasaka V Building 603 that overlap with the user presence range g . However, of the areas 703a and 703b, the area 703a is excluded from the viewable area based on the information “on the left side”.
FIG. 12 is a diagram showing a range where the areas 702a and 703b overlap. In the first specific example, since it is considered that the user is in a range where the convenience store K602 and the Akasaka V building 603 can be simultaneously viewed, the area 704 where the visible areas 702a and 703b overlap is the convenience store K602 and the Akasaka V building 603. It becomes a visible area.

  FIG. 13 is a diagram for explaining processing for determining the current position of the user and its error from the area 704. As illustrated, the user position correction processing unit corrects the positioning information so that the center of gravity o of the area 704 becomes the current position of the user. Further, a circle c3 including the area 704 is assumed. In the first specific example, since the radius of the circle c3 is 10 m, the corrected error of the current position of the user is represented by a circle having a radius of 10 m centered on the center of gravity o of the area 704.

FIG. 14 is a diagram showing the current position of the user corrected by the specific example described above and its error compared with the positioning information. In FIG. 14, the center of gravity o is the corrected user's current position, and the circle t indicates the error range of the current position. The point P is the current position of the user measured by the GPS device, and the user presence range g indicates the error range of the current position of the user who has been positioned. According to the process of the specific example 1, it is clear that the current position of the user is different from the current position of the user who has been measured, and that the error range is remarkably reduced.

(Specific example 2)
In addition, as in the first specific example, the embodiment of the present invention can not only correct the user presence range based on the positioning information but also acquire the position of the mobile communication device using only the user viewing range. is there. Specific example 2 will be described as such an example.
FIG. 15 is a diagram for explaining the second specific example. In specific example 2, it is assumed that the user has responded to the voice guidance that “French restaurant F is visible on the right side”. In such a case, the area 705 including the position of the mobile communication device can be identified immediately from the user viewing range of the French restaurant F605 on the right side of the traveling direction in the user viewing range of the French restaurant F.

In such a specific example, it can be seen that the mobile communication device is located in a range included in the area 705. Therefore, as is apparent from the specific example 2, this embodiment can also specify the position of the mobile communication device without using the positioning information.
Since the specific example 2 does not use the GPS function, it can be applied to an underground shopping mall or the like. In the specific example 2, the area 705 is specified only from the response “French restaurant F can be seen on the right side”. However, if the user is prompted to input information about a larger number of targets, the area 705 is more accurately detected. Of course, the position of the mobile communication device can be specified.

When the position of the mobile communication device is specified without using the positioning information obtained by the positioning device such as the GPS function as in the specific example 2, the present invention relates to the mobile communication device (for example, the mobile phone 201) and the mobile communication device. A position information acquisition system including a position information acquisition device (for example, server device group 4) that acquires a current position of the device, and a visual information database that associates a target with a visual recognition range in which the target is visible (For example, the database 304), and the position information acquisition device is configured to specify a target that can be visually recognized by the user based on information inputted by voice from the mobile communication device (for example, the voice recognition server device 1). And a visual range extraction means (for example, a visual range that allows the target to be visually recognized is extracted from the visual information database. A user position correction processing unit 303), and a position acquisition unit (for example, a user position correction processing unit 303) that uses a position included in the viewing range extracted by the viewing range extraction unit as the current position of the mobile communication device. Prepare.
If the position of the mobile communication device is specified together with the positioning information, the position of the mobile communication device can be specified with higher accuracy. Furthermore, the position of the mobile communication device can be specified with higher accuracy as the number of targets increases.

  The present invention can be applied to any system as long as it provides a service to the user based on the position information of the user having the mobile communication device and the information input by the user by voice.

DESCRIPTION OF SYMBOLS 1 Voice recognition server apparatus 2 Scenario server apparatus 3 Web server apparatus 4 Server apparatus group 201 Mobile telephone 202 Position correction server apparatus 301 Error determination part 302 User existence range specification part 303 User position correction process part 304 Database 304a Map data 304b Visual information data 601 and 602 Convenience store K
603 Akasaka V Building

Claims (7)

A mobile communication device for inputting information by voice;
A position information acquisition system comprising: a position information acquisition device including a voice analysis unit that analyzes information input by the mobile communication device and identifies a target included in the information;
The mobile communication device includes positioning means for measuring the current position of the own device, and transmits the positioning information obtained by the positioning to the position information acquisition device,
The position information acquisition device includes:
Correction processing means for correcting the positioning information measured by the mobile communication device based on the target specified by the voice analysis unit;
The correction processing means includes
An existence range specifying means for specifying an existence range in which the mobile communication device can exist based on an error relating to the positioning information;
Means for acquiring a user viewing range in which the target identified by the voice analysis unit is visible;
A viewable area specifying means for specifying a viewable area that is a range where the existence range and the user viewable range overlap;
Correction means for correcting the current position of the mobile communication device included in the positioning information to a position included in the viewable area;
A position information acquisition system comprising: A position information acquisition device including correction processing means for correcting positioning information obtained by positioning the position of a mobile communication device,
Analyzing information inputted by voice by the mobile communication device, and comprising a voice analysis unit for identifying a target included in the information,
The correction processing means includes
An existence range specifying means for specifying an existence range in which the mobile communication device can exist based on an error relating to the positioning information;
Means for acquiring a user viewing range in which the target identified by the voice analysis unit is visible;
A viewable area specifying means for specifying a viewable area that is a range where the existence range and the user viewable range overlap ;
Current position, and correcting means for correcting the position included in the viewable area, the position information acquisition device, characterized in that it comprises a said mobile communication device indicated by previous SL positioning information. When there are a plurality of the targets specified by the voice analysis unit,
The visually recognizable area identifying means identifies an area that overlaps a plurality of visually recognizable ranges corresponding to a plurality of targets identified by the voice analysis unit in the existence range as a visually recognizable area. The position information acquisition apparatus according to claim 2. The voice analysis unit analyzes information input by voice and identifies a direction in which the target can be seen,
The position information acquisition according to claim 2 or 3, wherein the viewable area specifying unit excludes a part of the specified viewable area from the viewable area based on a direction in which the target can be seen. apparatus. The correction processing means includes
The position information acquisition apparatus according to claim 2 or 3, wherein when the error regarding the positioning information is smaller than a predetermined value, the current position of the mobile communication apparatus indicated by the positioning information is not corrected. The correction processing means includes
The position information acquisition apparatus according to claim 2, wherein the current position of the mobile communication apparatus indicated by the positioning information is corrected to the center of gravity of the visible area. Position information acquisition executed by a position information acquisition device having correction means for correcting positioning information obtained by positioning the position of the mobile communication device based on a target included in information inputted by voice input by the mobile communication device A method,
An existence range specifying step for specifying an existence range in which the mobile communication device can exist based on an error relating to the positioning information;
Obtaining a user viewing range that is a range in which the target included in the information input by voice is visible;
A viewable area specifying step for specifying a viewable area that is a range where the existence range and the user viewable range overlap;
A position correction step of correcting the current position of the mobile communication device indicated by the positioning information to a position included in the viewable area;
A position information acquisition method comprising:

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