JP4299022B2 - Content search index generation device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a technique for creating an index for searching content acquired by a mobile object.
[0002]
[Prior art]
It is easy to collect multimedia content on a mobile terminal. However, in a mobile environment, it is not realistic and difficult to arrange and search and share contents collected by one user at each terminal. On the other hand, it is easy for the mobile terminal to collect log data automatically. However, the amount of log data is usually enormous, and it is not practical and difficult for a human to read it directly and instruct processing.
[0003]
Note that a content processing apparatus that can associate content with a content creation position is known (see Patent Document 1). In addition, there is known a technique for registering information that can be obtained only on the spot in a registration device or the like and taking the information in a portable terminal using a short-range wireless communication system to substitute for a memo pad (see Patent Document 2). .
[0004]
[Patent Document 1]
JP 2001-292389 A
[Patent Document 2]
JP 2002-312676 A
[0005]
[Problems to be solved by the invention]
An object of the present invention is to create an index that can relatively easily search content acquired (collected or the like) by a mobile object using log data.
[0006]
[Means for Solving the Problems]
The present invention has been made to solve the above-described problem, and is a content search index generation device mounted on a mobile body, and includes a content acquisition unit that acquires content, and the content acquired by the content acquisition unit , A log data recording unit that records log data including detection values acquired from a sensor attached to the moving body at predetermined timings, and log data recorded by the log data recording unit And an index generation unit that generates a content search index for searching for content from the storage device.
[0007]
ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to create the index which can search the content which the mobile body acquired (collected etc.) by the content acquisition part comparatively easily using log data.
[0008]
In the content search index generation device, for example, an association unit for associating the content acquired by the content acquisition unit and the log data recorded by the log data recording unit, and specifying from the log data associated with the content A detection value acquisition unit that acquires the detection value of the content search, wherein the index generation unit includes at least the detection value acquired by the detection value acquisition unit as the content search index, and the detection value and the storage An index that associates content stored in the device is generated.
[0009]
In this way, it is possible to generate an index that includes at least the detection value acquired by the detection value acquisition unit as the content search index and associates the detection value with the content stored in the storage device. It becomes. Therefore, for example, the user can search for specific content by referring to the index. Moreover, since it is indexed, it becomes possible to improve search efficiency.
[0010]
In the content search index generation device, for example, the content search index generation device further includes a conversion unit that converts the detection value acquired by the detection value acquisition unit into a character or the like display, and the index generation unit includes at least the content search index as An index including the display of characters converted by the conversion unit and associating the display of characters and the like with the content stored in the storage device is generated.
[0011]
In this way, it is possible to generate, as the content search index, an index that includes at least the display of characters and the like converted by the conversion unit and associates the display of characters and the like with the content stored in the storage device. It becomes. Therefore, for example, by referring to the index, the user can search for specific content using characters such as place names that are relatively easy to understand. Moreover, since it is indexed, it becomes possible to improve search efficiency.
[0012]
In the content search index generation device, for example, a sensor attached to the moving body is a current position detection unit. Moreover, as such a sensor, when a mobile body is a vehicle, various sensors attached to vehicles, such as a geomagnetic sensor, a speed sensor, an air temperature sensor, a humidity sensor, and a rainfall sensor, can be considered. The sensor may function alone as a sensor, or may function as a sensor by cooperating with computer processing.
[0013]
In the content search index generation device, for example, the content acquisition unit is a communication device that receives content provided from outside the mobile body. The content acquisition unit may be an input device for inputting content such as a captured image taken by a user or the like.
[0014]
In the content search index generation device, for example, the index generation unit may generate a content search index (position information index, time information index, day information index, etc.) for each type of detection value. Good. Further, the index list information may be generated by appropriately combining these indexes.
[0015]
The present invention can also be specified as a vehicle equipped with the content search index generation device.
[0016]
Moreover, this invention can also be specified as follows as invention of a method. A method for generating an index for searching content acquired by a moving body, the step of acquiring the content, the step of storing the acquired content, and the sensor attached to the mobile body Recording log data including the detected value at predetermined timings, and generating a content search index for searching the stored content based on the recorded log data. Content search index generation method.
[0017]
The present invention can also be specified as the invention of a program as follows. A program for generating an index for searching for content acquired by a mobile object, the step of acquiring the content, the step of storing the acquired content, and the sensor attached to the mobile object Recording log data including the detected value at predetermined timings, and generating a content search index for searching the stored content based on the recorded log data. Content search index generation program to be executed.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a content search index generation device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram for explaining a schematic configuration of a content search index generation apparatus (hereinafter simply referred to as an index generation apparatus) according to an embodiment of the present invention. FIG. 2 is a diagram for explaining the data structure of the map database. FIG. 3 is a diagram for explaining an example of association between log data and content.
[0019]
The index generation device 100 is mounted on a moving body such as a vehicle, and searches for content (also referred to as content information) acquired by the moving body (acquired from outside or input from a user). Is a device for generating an index for content search. Log data is used for the generation. Hereinafter, a case where the moving body is a vehicle will be described as an example.
[0020]
The index generation apparatus 100 includes a CPU 101 that controls the entire operation, a content acquisition unit 102, a storage device 103, a map database 104, a memory 105, an I / F 106, and the like connected to the CPU 101 via a bus or the like. .
[0021]
Further, the index generation device 100 includes a log data recording unit 107, a conversion unit 108, an index generation unit 109, and the like that are realized by the CPU 101 executing a predetermined program.
[0022]
The content acquisition unit 102 is for acquiring content, and is, for example, a communication device or an input device. The communication device is a high-speed wireless LAN device such as an IEEE802.11b wireless LAN 11 Mbps mode, for example, and receives content provided wirelessly from the outside of the vehicle such as a hot spot. The input device is, for example, a device for reading content from a recording medium such as a wired or wireless I / F (interface) for acquiring a captured image from a digital camera or a memory card. The contents include multimedia data such as images and sounds recorded by the index generating device 100 itself, various data (traffic information, tourist information, event information) collected by the index generating device 100 at hot spots, etc., and a user using a digital camera, etc. There are images taken with
[0023]
The storage device 103 is for storing the content acquired by the content acquisition unit 102 and is, for example, a relatively large-capacity storage device such as a hard disk device or a flash memory. The storage device 103 is installed with an operating system (hereinafter referred to as an OS), a predetermined program for executing the log data recording unit 107, the conversion unit 108, the index generation unit 109, and the like, which are executed on the OS, and other programs. Has been.
[0024]
As shown in FIG. 2, the map database 104 stores, for each area, the latitude / longitude range of the area and the display of characters such as the place name of the area (also referred to as attribute values) in association with each other. Yes. The memory 105 is a memory into which a predetermined program, data, and the like are read. For example, the memory 105 is a storage device such as a RAM.
[0025]
Sensors S1, S2,... Are connected to the index generation apparatus 100 via an I / F (interface) 106. Sensors S1, S2,... Are, for example, current position detecting means including a GPS receiver, a geomagnetic sensor, a speed sensor, an air temperature sensor, a humidity sensor, and a rainfall sensor attached to each part of the vehicle. The current position detection means is for detecting the current position (latitude / longitude) of the vehicle. The geomagnetic sensor is for detecting the traveling direction of the vehicle. The temperature sensor is for detecting the temperature outside or inside the vehicle. The humidity sensor is for detecting the humidity outside or inside the vehicle. The rainfall sensor is for detecting the rainfall.
[0026]
The log data recording unit 107 is for recording log data including detection values (latitude / longitude, temperature, humidity, etc.) acquired from the sensors S1, S2,... is there. The log data shown in FIG. 3 indicates that it is recorded every predetermined timing (1 second). As shown in the figure, the log data includes items such as a log ID for identifying the log data, latitude / longitude, date, time, day of the week, temperature, and humidity. The date, time, and day of the week are acquired from a calendar unit (not shown) or the like. The calendar unit can also be grasped as a sensor attached to the vehicle.
[0027]
The conversion unit 108 is for converting the detection values detected by the sensors S1, S2,. For this conversion, for example, the conversion unit 108 searches the map database 104 or the like using a specific detection value (for example, latitude, longitude) as a key, and associates the detection value (including latitude / longitude range). The display of characters and the like (for example, XX town 1-chome) is read from the map database 104. As a result, the detected value is converted into a character display.
[0028]
The index generation unit 109 includes at least a display of characters and the like converted by the conversion unit 108, and generates an index (content search index) that associates the display of the characters and the like with the content stored in the storage device 103. Is. The index generation unit 109 generates an index (for example, a position information index, a time information index, and a day information index) for each type of detection value.
[0029]
Next, the operation of the index generating apparatus having the above configuration will be described with reference to the drawings. FIG. 4 is a flowchart for explaining the operation of the index generation apparatus. The following processing is realized by reading a predetermined program into the index generating apparatus 100 and executing it by the CPU 101.
[0030]
The index generation device 100 acquires content while moving as the vehicle in which the index generation device is mounted moves (S100). For example, the index generation apparatus 100 receives content provided wirelessly from the outside of the vehicle, such as a hot spot, or a photographed image taken by a vehicle user or the like with a digital camera by the content acquisition unit 102. The content is acquired (also called collection).
[0031]
When the vehicle communication device 100 is turned on, as shown in FIG. 3, the log data recording unit 107 detects the current position attached to each part of the vehicle at a predetermined timing (for example, 1 second). The detection values (latitude / longitude, temperature, humidity, etc.) are acquired from the sensors S1, S2,..., Etc., and the date is acquired from the calendar unit, and log data including these detection values, etc. is stored in the storage device. 103, etc. (S100). As long as power is supplied to the vehicle communication device 100, the log data is continuously recorded while the content is collected. Since each log data is added with a log ID that is updated at a predetermined timing, each log data can be identified.
[0032]
Here, it is assumed that the contents 1 to 4 shown in FIG. 3 have been acquired under the situation where the log data is recorded as described above. The acquired contents 1 to 4 are stored in the storage device 103 or the like.
[0033]
(Location information index creation process)
[0034]
When the index generation apparatus 100 acquires content, the index generation apparatus 100 creates a position information index (S101 to S103). The position information index is an index (content search index) for searching the acquired contents 1 to 4. The position information index is created as follows.
[0035]
(Associating content with log data)
[0036]
When acquiring the content, the index generating apparatus 100 associates the content with the log data (S101). That is, a link is constructed between content and log data. Since the log data includes a position (latitude / longitude), a day of the week, and a time, the position (latitude / longitude), the day of the week, and the time at which the content is acquired can be specified by associating the two.
[0037]
FIG. 3 shows that log IDs 1 to 3 are associated with content 1, log IDs 4 and 5 are associated with content 2, log ID 8 is associated with content 3, and logs 9 and 10 are associated with content 4.
[0038]
The association between content and log data can be performed by various methods. For example, the log ID (for example, log ID1, ID2, and ID3) of the log data recorded in the content (for example, content 1) while the content is acquired (for example, the time period from the start of reception to the completion of reception). Append. This association may be performed every time content is acquired, or not every time content is acquired, but at a predetermined timing (for example, when a predetermined period has elapsed since the last content was acquired) It is also possible to perform all the contents acquired in a batch. For example, when a time stamp is included in the content, the two can be associated by comparing the time stamp with the time in the log data at a predetermined timing.
[0039]
(Conversion to character display)
[0040]
When the association between the content and the log data (that is, the construction of the link between the content and the log data) is completed, the index generation device 100 determines the position (latitude / longitude) of the content so that the user can easily understand the position. Is converted into a display of characters such as place names corresponding to (S102). By this conversion, the user can search for contents by using characters such as place names that are relatively easy to understand. This conversion is performed for the following reason. That is, the user may not ask the latitude / longitude of the location information, for example, but it is easy to understand where the town name is heard. This is because it is effective to convert to the form of the index that contains it.
[0041]
This conversion is performed by the conversion unit 108 as follows. The conversion unit 108 acquires (or extracts) a specific detection value (latitude / longitude “33.45, 139.29”) from log data (for example, log data of log ID 1) associated with each content (for example, content 1). Then, the conversion unit 108 searches the map database 104 using this as a key, and displays a character or the like associated with the latitude / longitude range including the detected value (latitude / longitude “33.45, 139.29”) (for example, XX town) 1-chome) is read from the map database 104 (S102). As a result, the detected value (latitude / longitude) is converted into a character display. This display of characters and the like represents the acquisition location of the corresponding content.
[0042]
(Association between text display and content)
[0043]
When the conversion to the character display or the like is completed, the index generation device 100 includes at least the display of the character such as the converted place name by the index generation unit 109, and the content stored in the storage device 103. Is created (S103). That is, a link is constructed between the display of characters such as the place name and the content.
[0044]
By creating an index that associates both, it is possible for the user to search for content by using characters such as place names that are relatively easy to understand. Moreover, since it is indexed, it becomes possible to improve search efficiency.
[0045]
The position information index shown in FIG. 3 includes content 1 in the character display “XX town 1-chome”, content 2 in the character display “XX2-chome”, content 3 in the character display “near YY station”, characters, etc. It is shown that the contents 4 are associated with the display “ZZ street”.
[0046]
This association can be performed by various methods. For example, the index generation unit 109 creates an index composed of items such as characters and content identification information converted by the conversion unit 108 as position information indexes. For example, “XX town 1-chome” is displayed as the item of characters and the like. Are registered in the content identification information item. Thereby, both are associated. The position information index created as described above is stored in the storage device 103, for example.
[0047]
(Day-of-week information index creation process)
[0048]
When the creation of the position information index is completed, the index generation device 100 creates a day information index that includes at least the day of the week and associates the day of the week with the content stored in the storage device 103 by the index generation unit 109 (S104). And S105). The day-of-week information index is an index (content search index) for searching the acquired contents 1 to 4.
[0049]
By creating an index that associates both, the user can search for content using the day of the week as a clue. Moreover, since it is indexed, it becomes possible to improve search efficiency.
[0050]
This association can be performed by various methods. For example, a detection value (day of week “Friday”) is acquired (or extracted) from log data (for example, log data of log ID 1) associated with each content (for example, content 1) (S104). Alternatively, the day of the week “Friday” corresponding to the date of the log (“2002.1.15”) is acquired from the calendar unit. Next, the index creation unit 109 creates an index including the acquired day of the week and content identification information items as the day of the week information index. For example, the detection value “gold” is set for the day of the week item and the content identification information item is set. "Content 1" is registered respectively. Thereby, both are associated (S105). The day information index created as described above is stored in the storage device 103, for example.
[0051]
(Time information index creation process)
[0052]
When the creation of the day information index is completed, the index generation device 100 creates a time information index (S106, 107). The time information index is an index (content search index) for searching the acquired contents 1 to 4. The time information index is created as follows.
[0053]
(Conversion to character display)
[0054]
The index generation device 100 converts the content acquisition time into the approximate time (displayed in characters, etc.) (S106). By this conversion, the user can search for content by using an approximate time that is relatively easy to understand.
[0055]
This conversion is performed by the conversion unit 108 as follows. The conversion unit 108 acquires (or extracts) a specific detection value (time “15:22”) from log data (for example, log data of log ID 1) associated with each content (for example, content 1). Then, the conversion unit 108 generates an approximate time obtained by combining the first half “15” and “hour base” (S106). As a result, the detected value (time) is converted into a character display (estimated time) (S106). This approximate time represents the approximate acquisition time of the corresponding content.
[0056]
(Association between text display and content)
[0057]
When the conversion to the character display is completed, the index generation device 100 associates the display of the character and the content stored in the storage device 103 with the index generation unit 109 including at least the converted approximate time. A time information index is created (S107). That is, a link is constructed between the estimated time and the content.
[0058]
By creating an index that associates the two, the user can search for content using the approximate time that is relatively easy to understand. Moreover, since it is indexed, it becomes possible to improve search efficiency.
[0059]
This association can be performed by various methods. For example, the index creation unit 109 creates an index composed of items such as characters and the like (estimated time) converted by the conversion unit 108 and content identification information as a time information index. “15 o'clock” is registered in the item, and “content 1” is registered in the content identification information item. Thereby, both are associated. The time information index created as described above is stored in the storage device 103, for example.
[0060]
(Grant information index creation process)
[0061]
When the creation of the time information index is completed, the index generation device 100 includes at least the grant information when the grant information (for example, keyword) is added to the acquired content (S108: Yes). And an assignment information index that associates the content stored in the storage device 103 with each other (S109). The assigned information index is an index (content search index) for searching the collected contents 1 to 4.
[0062]
By creating an index that associates the two, the user can search for content using the given information as a clue. Moreover, since it is indexed, it becomes possible to improve search efficiency.
[0063]
This association can be performed by various methods. For example, it is determined whether or not additional information is added to each content (S108), and for the content to which additional information is added, additional information is acquired from the content (for example, content 4). Next, the index generation unit 109 creates an index composed of the acquired additional information and content identification information items as the additional information index. For example, the additional information “XX town tour guide” “Content 4” is registered in the item of identification information. Thereby, both are associated. The assignment information index created as described above is stored in the storage device 103, for example.
[0064]
(Other index creation processing)
[0065]
In addition to the location (latitude / longitude), day of the week, and time, the log data records temperature, humidity, rainfall, etc., so at least the temperature (for example, characters such as “high” or “low” are displayed) Temperature information index that associates the temperature with the content, and includes at least humidity (for example, characters such as “high” or “low”), and a humidity information index that associates the humidity with the content, or at least rainfall It is also possible to create a rainfall information index that includes (for example, characters such as “more” or “less”) and associates the humidity with the content. In this way, by creating an index that associates the two, content collected under such circumstances, with the display of characters and the like that are relatively easy for the user to understand (for example, the temperature is “high” or “low”) It becomes possible to search. Moreover, since it is indexed, it becomes possible to improve search efficiency.
[0066]
When the above processing is completed, each of the contents 1 to 4 is assigned a plurality of indexes.
[0067]
As described above, according to the index generation device 100 of the present embodiment, content can be generated by providing a function for automatically generating an index for content search from log data and constructing a link with the content. Even when used alone, the convenience of the user is greatly improved.
[0068]
(Usage example of each index)
[0069]
A usage example of each index generated as described above will be described with reference to the drawings. FIG. 5 is a diagram for explaining an example of use.
[0070]
In a mobile environment, it is difficult to send a large amount of multimedia content between terminals (hereinafter referred to as terminals) such as the content generation apparatus 100 mounted on other vehicles. Therefore, it is necessary to accurately find and transmit the content desired by the user. Therefore, the above-mentioned indexes are summarized for each content, the data type of the content is also shown, and index list information as shown in FIG. 5 is created. Thus, by creating index list information for each content, the attributes of the content held by other terminals become clear.
[0071]
Then, this index list information (or an individual index may be registered) in the server together with its own node information (for example, its own IP address) by a terminal, or in an ad hoc network constructed by a plurality of terminals, directly / indirectly Replace it. This makes it possible to search for content among a plurality of terminals.
[0072]
The index list information shared as described above is presented to the user and indicates what kind of content exists. Although this method depends on the user interface, for example, it is possible to indicate the position where the content is present on the map, or list the content as text information.
[0073]
It is also possible to indicate conditions by combining indexes in a composite manner. For example, it is possible to present content such as “image of XX intersection at 7 o'clock on Monday”.
[0074]
A user who wants to acquire content can also select content from the presented information. If the index of the content you want exists, send a request to the terminal that holds it. The terminal that has received the request extracts the corresponding content based on the link information and sends it to the requesting terminal.
[0075]
It is also possible for the user to specify a condition and perform a search based on the index list information. However, since the content is not comprehensively collected, content that satisfies the conditions does not always exist.
[0076]
If a more detailed search is desired, the search condition is broadcast to other terminals. For example, the corresponding latitude / longitude range, time range, and the like. Upon receiving this, the terminal performs a search process on the log data. If there is log data that satisfies the conditions, the corresponding content is extracted based on the link information and sent to the requesting terminal.
[0077]
Another example of use is the exchange of contents between automobiles. If each car can shoot by themselves or download it at a hotspot and share with each other the content obtained while moving, the range of content will be greatly expanded. In particular, if content is exchanged with an oncoming vehicle, information on the area to be reached is obtained in advance, and convenience is greatly improved.
[0078]
In this way, by exchanging the index list information between terminals, searching for content possessed by other terminals is facilitated, and content sharing is realized.
[0079]
In the present embodiment, the case where the moving body is a vehicle such as an automobile has been described as an example, but the present invention is not limited to this. For example, the mobile body only needs to have a function equivalent to that of a vehicle, and may be a motorcycle, a bicycle, or the like. The mobile body may be a mobile terminal such as a notebook computer, a mobile phone, a PHS phone, or a PDA.
[0080]
Note that there are some contents whose copyrights are managed and usage fees have to be paid. In that case, settlement and the like can be managed by using a method in which the content is encrypted and distributed, and the decryption key is purchased directly from the server of the content provider and used.
[0081]
In addition, when the terminal capability and communication path capacity are sufficient, in addition to the created index list information, it is also possible to exchange link information between log data and its contents. In this way, it is possible to search the log data of other terminals on the own terminal, and fine search can be efficiently performed.
[0082]
In addition, when the communication path capacity with the server is sufficient, the content itself can be uploaded to the server and registered. In an ad hoc network environment, it is not always possible to connect to a terminal that holds content. However, when content exists in a server, it is possible to acquire content as long as communication path capacity with the server can be secured. Even in this case, information about the index is effective for the search.
[0083]
If the content is uploaded to the server, the content can be searched and acquired from a fixed terminal (such as a PC connected to the Internet). Originally, it seems that there are a lot of contents sent to mobile terminals, but the range of usage is widened by being able to access the situation from a fixed terminal so that the situation of distant points can be understood without moving.
[0084]
The present invention can be implemented in various other forms without departing from the spirit or main features thereof. For this reason, the above-described embodiment is merely an example in all respects, and the present invention is not construed as being limited by these descriptions.
[0085]
【The invention's effect】
As described above, according to the present invention, it is possible to create an index that can relatively easily search content acquired (collected or the like) by a mobile object using log data.
[Brief description of the drawings]
FIG. 1 is a diagram for explaining a schematic configuration of a content search index generation device according to an embodiment of the present invention;
FIG. 2 is a diagram for explaining a data structure of a map database.
FIG. 3 is a diagram for explaining an example of association between log data and content;
FIG. 4 is a flowchart for explaining the operation of the content search index generation device.
FIG. 5 is a diagram for explaining an example of using an index;
[Explanation of symbols]
100 Index generation device for content search (index generation device)
101 CPU
102 Content acquisition unit
103 storage device
104 Map database
105 memory
106 I / F
107 Log data recording unit
108 Conversion unit
109 Index generator
S1, S2 sensor

Claims (9)

An index generation device for content search installed in a vehicle ,
A content acquisition unit for acquiring content;
A storage device for storing the content acquired by the content acquisition unit;
A log data recording unit that records log data including a detection value acquired from a sensor attached to the vehicle at a predetermined timing;
An index generation unit that generates a content search index for searching for content from the storage device based on log data recorded by the log data recording unit;
Content obtained by the index of the content search index generated by the terminal of the other vehicle from the terminal of the other vehicle, and the content possessed by the terminal of the other vehicle based on the acquired index list information Search part to search and get
A content search index generation device comprising: Association means for associating the content acquired by the content acquisition unit with the log data recorded by the log data recording unit;
A detection value acquisition unit that acquires a specific detection value from log data associated with the content;
Further comprising
The index generation unit
The content search index includes at least the detection value acquired by the detection value acquisition unit, and generates an index that associates the detection value with the content stored in the storage device.
The content search index generation device according to claim 1. A conversion unit that converts the detection value acquired by the detection value acquisition unit into a character display;
The index generation unit
The content search index includes at least a display of characters and the like converted by the conversion unit, and generates an index that associates the display of characters and the like with the content stored in the storage device.
The content search index generation device according to claim 2. 4. The content search index generation device according to claim 1, wherein the sensor attached to the vehicle is a current position detection unit. The content search index generation device according to any one of claims 1 to 4, wherein the content acquisition unit is a communication device that receives content provided from outside the vehicle . The content search index generation device according to claim 1, wherein the content acquisition unit is an input device for inputting content. The content search index generation device according to claim 1, wherein the index generation unit generates a content search index for each type of detection value. A method for a computer to generate an index for searching content acquired by a vehicle ,
A computer acquiring content;
A computer storing the acquired content;
A computer recording log data including a detection value acquired from a sensor attached to the vehicle at predetermined timing;
And step computer, based on said recorded log data, generates a content search index for searching the stored contents,
A computer acquiring index list information, which is a list of the content search indexes generated by a terminal of another vehicle, from the terminal of the other vehicle;
A content search index generation method comprising: a computer searching and acquiring content possessed by a terminal of the other vehicle based on the acquired index list information . A program for generating an index for searching content acquired by a vehicle ,
Acquiring content,
Storing the acquired content;
Recording log data including detection values acquired from sensors attached to the vehicle at predetermined timings;
Generating a content search index for searching the stored content based on the recorded log data;
Obtaining index list information that is a list of the index for content search generated by a terminal of another vehicle from the terminal of the other vehicle;
A content search index generation program for causing a computer to execute a step of searching and acquiring content possessed by a terminal of the other vehicle based on the acquired index list information .

Images