JP2004032298A - Transmitting method, receiving method, transmitter and receiver in data broadcast - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transmitting method, a receiving method, a transmitter and a receiver capable of providing local information corresponding to a desired location. <P>SOLUTION: The transmitting method in data broadcast transmitting both information, corresponding to a location and a code for designating the location comprises a step for converting latitude and longitude information into the format of location designating code in data broadcast, and a step for transmitting the converted latitude and longitude information, together with local information corresponding to the latitude and longitude information. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a transmission method, a reception method, a transmission device, and a reception device in data broadcasting, and more particularly, to a transmission method, a reception method, a transmission device, and a reception device for providing area information corresponding to a desired area.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a data service using broadcasting has been known. In particular, as a method for providing a receiving device at a specific point with local information such as weather information specific to the point, a broadcasting station (transmitting device) ) Side, transmits broadcast signals for all target areas, and the receiver specifies location information as a selection criterion, so that only information related to the location information specified by the receiver is extracted from the broadcast information. The specific area information is provided by selectively displaying the information.
[0003]
In recent digital broadcasting services, an encoding method using a postal code as an area designating code for designating an area for providing area information is based on a data broadcasting standard (ARIB (Radio Industry Association) STD-B24 Vol. 2 Appendix) It is standardized by the rule B), whereby the area can be specified using the postal code, and the receiving side can obtain the area information corresponding to the area specified by the postal code. The area (position) -linked service in the conventional digital broadcasting service encodes a zip code corresponding to a certain point, transmits the coded zip code, and compares the zip code with a zip code specified by the receiving device to have a broadcast signal having information on all areas. The information of the corresponding area is extracted and displayed.
[0004]
In general, as a data broadcasting system for multiplexing and transmitting a video broadcast and a data broadcast of a broadcast program, a content defined by a data broadcasting standard (ARIB STD-B24), which is a Japanese digital broadcasting standard, is used. An XML (extensible Markup Language) language-based BML (Broadcast Markup Language) as a description language of the XML, and a Java (registered trademark) ScriptanScript Creative Language based ECMA (European Convention Enterprise) as a script language for describing procedural processing. It is used. Accordingly, monomedia such as characters, graphics, and still images can be encoded as multimedia information, and it is possible to cope with provision of various information.
[0005]
[Problems to be solved by the invention]
However, in the above-mentioned area-linked service, data is generated and transmitted for each area toward the entire broadcast area, and necessary information is extracted and displayed at the receiving device, so that the transmission amount increases, and the receiving device requires There is a problem that the extraction process is complicated.
[0006]
Further, in the conventional process of extracting specific information using a postal code, there are problems as shown in the following (1) to (3).
[0007]
{Circle around (1)} An accurate postal code for the location where the receiving device is located or the area where it is desired to acquire must be set in advance.
[0008]
{Circle over (2)} Postal codes are numbered mainly based on administrative divisions, and the geographical distribution is not uniform. Therefore, depending on the type of information, information irrelevant to the area may be displayed.
[0009]
{Circle around (3)} In the case of reception at a mobile object, the reception position dynamically changes, so it is very difficult to cope with the postal code system which is set in advance.
[0010]
Furthermore, a specific area information service using latitude / longitude information obtained from a GPS (Global Positioning System) or the like is not provided at the present time, and there is no special standard for extracting a specific area.
[0011]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has been developed in a "position-linked service" for displaying a data broadcast corresponding to a position (current position or designated position) desired by a receiver (receiving device). Within a range of the standard, a method for transmitting a plurality of area information efficiently, a transmission method in a data broadcast capable of displaying the regional information on the receiving side, a receiving method, a transmitting device and a receiving device are provided. I do.
[0012]
[Means for Solving the Problems]
In order to solve the above problems, the present invention employs means for solving the problems having the following features.
[0013]
The invention described in claim 1 is a transmission method in data broadcasting for transmitting both area information corresponding to an area and an area designating code for designating the area, wherein the latitude and longitude information is specified in the area designation in the data broadcasting. A conversion step of converting the information into a code format; and a transmission step of transmitting the latitude and longitude information converted in the conversion step and area information corresponding to the latitude and longitude information.
[0014]
According to the first aspect of the present invention, it is possible to use a coding area of a region designation code in which latitude and longitude information is standardized, and to perform efficient transmission. Furthermore, by using the latitude and longitude information as the area designation code, accurate information can be provided without any positional error.
[0015]
The invention described in claim 2 is characterized in that, in the conversion step, each of the latitude and longitude information is converted in correspondence with one of the area designation codes.
[0016]
According to the second aspect of the present invention, the location information can be acquired with high accuracy by having each area designation code. In particular, when information on a desired area is acquired on the receiving device side, an existing function for extraction can be used.
[0017]
The invention described in claim 3 is characterized in that the area is specified by having at least two pieces of information of the latitude and longitude information.
[0018]
According to the third aspect of the present invention, when area information exists over a large area, an area having the same area information can be easily set by using at least two pieces of latitude and longitude information.
[0019]
In the invention described in claim 4, when the area information is the same and one of the latitude and longitude information is the same, the other latitude and longitude information is replaced with the other latitude and longitude information. It is characterized by a plurality of correspondences.
[0020]
According to the invention described in claim 4, when there are a plurality of area ranges having the same area information, and when there is latitude information or longitude information common to a plurality of areas, only information of a different latitude or longitude is transmitted. By doing so, the amount of data to be transmitted can be reduced. Also, on the receiving side, data duplication can be avoided, so that the efficiency of extracting desired area information can be improved.
[0021]
The invention described in claim 5 is characterized in that the area information is made to correspond to an ID, and the area information is inserted into another area in association with the ID and transmitted.
[0022]
According to the fifth aspect of the present invention, the area information is represented by an ID having a small data amount, and the area information can be acquired using the ID as a key only by transmitting the ID corresponding to the area information once as another area. Therefore, the data amount of the regional information corresponding to the region can be reduced, and efficient data broadcast transmission can be performed.
[0023]
According to a sixth aspect of the present invention, there is provided a receiving method for receiving a data broadcast having region information corresponding to a region and a region designation code designated by the latitude and longitude information. Extracting the area information based on the designation step of designating with the latitude and longitude information, the latitude and longitude information designated in the designation step, and the latitude and longitude information included in the received data broadcast. And an extraction step.
[0024]
According to the sixth aspect of the present invention, it is possible to specify the latitude and longitude information of a desired area on the receiving side, and thereby obtain the area information corresponding to the latitude and longitude information. Furthermore, since the acquired area information corresponds to the latitude and longitude information, accurate information can be acquired.
[0025]
An invention according to claim 7, wherein in a transmitting apparatus for data broadcasting transmitting both area information corresponding to an area and an area designating code for designating the area, the latitude and longitude information is transmitted to the area designating code for data broadcasting. And a transmission unit for transmitting the latitude and longitude information converted in the conversion step and area information corresponding to the latitude and longitude information.
[0026]
According to the seventh aspect of the present invention, it is possible to use the coding area of the area designation code in which the latitude and longitude information is standardized, and it is possible to perform efficient transmission. Furthermore, by using the latitude and longitude information as the area designation code, accurate information can be provided without any positional error.
[0027]
The invention described in claim 8 is characterized in that the conversion unit has a table of area information corresponding to the latitude and longitude information.
[0028]
According to the invention described in claim 8, when information on a desired area is acquired on the receiving device side, an existing function for extracting can be used.
[0029]
In a receiving apparatus for receiving a data broadcast having region information corresponding to a region and a region designation code whose region is designated by latitude and longitude information, the invention according to claim 9 is characterized in that: Based on the latitude and longitude information, the latitude and longitude information specified by the specification unit, and the latitude and longitude information included in the received data broadcast, the area information to be obtained And an extraction unit for extracting
[0030]
According to the ninth aspect of the present invention, it is possible to specify the latitude and longitude information of a desired area on the receiving side, and thereby to obtain the area information corresponding to the latitude and longitude information. Furthermore, since the acquired area information corresponds to the latitude and longitude information, accurate information can be acquired.
[0031]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention utilizes a "coding scheme for specifying a region using a postal code" standardized by a data broadcasting standard (ARIB STD-B24, second edition), and latitude and longitude that can be measured by GPS or the like. Is encoded with the same area designation code as that of the postal code, this area information (the range of latitude and longitude) is efficiently encoded and transmitted, and the data broadcasting standard (ARIB STD-B24, second edition) By using the "search () function" which is an API (Application Program Interface) for postal code search defined in the above, the receiving device can easily perform extraction processing for extracting desired local information by the receiving device, and provide the receiver with the local information. The main purpose is to provide
[0032]
Here, the specific contents of converting the latitude and longitude to the postal code area of the present invention will be described.
[0033]
First, when latitude and longitude are represented by seven-digit numerical values of "degree", "minute", and "second" (for example, 137 degrees 00 minutes 00 seconds), the distance per second is about 30 m. That is, encoding can be performed with an accuracy of about 30 m. As shown in the Data Broadcasting Standard (ARIB STD-B24 Vol. 2 Appendix B), the range of the numerical value can be specified by a three-, five-, or seven-digit numerical value. For example, if you want to specify a range only in units of “degrees” (approximately 110 km range), specify a range of 3 digits. If you want to specify a range in units of “minutes” (approximately 1.8 km), specify a range of 5 digits. If the user wants to specify a range in units of "seconds" (about 30 m), a 7-digit range is specified, so that efficient encoding corresponding to desired accuracy can be performed.
[0034]
Here, when the specified range is limited to Japan, it is also possible to specify seven digits in units of 0.1 second (accuracy of about 3 m) by omitting the hundreds place of longitude. For example, when it is desired to encode a rectangular area (longitude aaa ° aa′aa ″ to bbb ° bb′bb ″, latitude ccc ° cc′cc ″ to ddd ° dd′dd ″) on a certain map by using a binary table, data broadcasting According to the definition of the binary table (BinaryTable) object defined in the standard (ARIB STD-B24 Vol. 2), in one record in the binary table, the zip code field encoding the range of longitude and the range of latitude are encoded. Describe the zip code fields that have been converted. The binary table object is binary two-dimensional tabular data, and is an object having a search function for extracting a necessary partial table.
[0035]
Here, FIG. 1 shows a definition of a search () function of a binaryTable for performing a search on data in a binary table. The search () function is described in the data broadcasting standard (ARIB STD B-24, second edition).
[0036]
Based on the definition shown in FIG. 1, it is possible to easily extract specific area information by setting the latitude and longitude described later.
[0037]
Note that the description of the processing on the receiving device side (script description in the content) includes the current position of the receiving device obtained from the GPS or the like, or the specification specified by the receiving device (automatically or by input from an operator). The position of the point (longitude eee ° ee′ee ″, latitude fff ° ff′ff ″) is applied to an API for the search () function, and AND is applied to a field in which longitude is encoded and a field in which latitude is encoded. Search for the relationship. Thereby, when the specified latitude and longitude are included in the range of the corresponding latitude and longitude in the binary table, the corresponding record can be used as the return value of the search () function, Local information can be obtained. If no record is found as a result of searching all the records, "-1" is returned as a return value. Can be displayed easily.
[0038]
Note that the search () function API is a specification that returns all records corresponding to the search condition, so that even if the regions to be encoded overlap, they are all to be extracted.
[0039]
Further, in a location information-linked service in data broadcasting, information indicating (plural) geographical regions (regions) and region information (weather information, disaster information, traffic information, living information) associated with each region are provided. Etc.) are transmitted as broadcast content. In the receiving device, for example, based on information obtained from a connected GPS or the like, region information of a specific region such as the current position can be extracted from the content information, and accurate information can be displayed on the receiving device.
[0040]
Next, embodiments of the present invention will be described with reference to the drawings.
[0041]
FIG. 2 is a diagram illustrating an example of a block configuration of the transmission device according to the present invention.
[0042]
2 includes a position-linked data storage unit 11, a content-related data storage unit 12, a binary table generation unit 13, a content production unit 14, an encoding unit 15, and a transmission unit 16. It is configured. In addition, the position-linked data storage unit 11 has a data server 17 for acquiring regional information data from outside the transmission device 1 as needed, and the content-related data storage unit 12 has a data server 17 as needed. Various data 18 such as a BML document and a still image can be acquired from the outside.
[0043]
First, the position-linked data storage unit 11 stores information to be used for transmission from area information (disaster information, traffic information, living information, etc.) associated with each area. If there is no information in the position-linked data storage unit 11, necessary information is acquired from the data server 17 and stored. The content-related data storage unit 12 stores information to be used for transmission from mono-media such as BML documents and still images. When there is no information in the content-related data storage unit 12, necessary information is obtained from the various data 18 and stored.
[0044]
The binary table generation unit 13 uses a method as described in Examples 1 to 4 described below, based on the position information stored in the position-linked data storage unit 11 and information (disaster information and the like) related to the position information. Then, the latitude and longitude information is converted into a postal code format, and the range of the latitude and longitude information is set in the area of the binary table corresponding to the postal code defined by the postal code encoding method.
[0045]
The content production unit 14 first obtains a basic (template) content from the BML and mono media such as characters, graphics, still images, and audio from the content-related data storage unit 12. Next, a binary table is acquired from the binary table generator 13. Further, the binary table generation unit 13 also obtains the structure information of the obtained binary table.
[0046]
Next, an extraction processing script for extracting area information related to a specific position is generated in the ECMAScript part in the BML document existing in the content from the acquired structure information. Note that the following procedures (1) to (4) are described in the generated BML document.
[0047]
(1) A procedure for acquiring the latitude and longitude information of the current position using a GPS or the like built in or connected to the receiving device. In addition, the receiver using the receiving device may input not only the latitude and longitude information of the current position but also the current position of the receiving device or the latitude and longitude of an arbitrary point.
[0048]
(2) A procedure for opening the binary table based on the position (resource name) of the binary table transmitted from the binary table generator 13 in the transmission space.
[0049]
(3) A procedure for searching based on the structure of the binary table, using the current position acquired in (1) as a key.
[0050]
(4) A procedure for providing relevant information to the recipient based on the search result of (3).
[0051]
The content production unit 14 composes the above-described BML document, various types of monomedia, and a binary table, and configures the content as a data broadcast content that can be transmitted. The content produced by the content producing unit 14 is encoded by the encoding unit 15 to generate a TS (Transport Stream), and further modulated by the transmission unit 16 and transmitted as a data broadcast signal.
[0052]
The transmitting device 1 described above can insert the latitude and longitude information into the postal code encoding area determined by the postal code encoding method. As a result, the area information for the area can be set in detail.
[0053]
Next, processing on the receiving device side for receiving data broadcast from the transmitting device 1 will be described with reference to the drawings.
[0054]
FIG. 3 is a diagram illustrating an example of a block configuration of a receiving device according to the present invention.
[0055]
3, the receiving apparatus 2 includes a receiving unit 21, a decoding unit 22, a buffer memory 23, a GPS position obtaining unit 24, a position information input unit 25, a position information storage unit 26, and an extraction unit 27. The display unit 28 is provided.
[0056]
In the receiving device 2, the receiving unit 21 receives the broadcast signal transmitted from the transmitting device 1, performs a demodulation process in the receiving unit 21, generates a TS packet signal in the data broadcast, and acquires a data carousel. Here, the data carousel is a method of repeatedly transmitting the same data in data broadcasting. The latest data can always be received and displayed when the receiver is turned on or after an operation such as changing the channel of a program.
[0057]
Next, the decoding unit 22 generates the content information by decoding the TS packet signal. The generated content information is output to the buffer memory 23, and the buffer memory 23 stores the content information.
[0058]
The position information storage unit 26 stores the acquired latitude and longitude information when the GPS position acquisition unit 24 specifies the latitude and longitude information of the current position of the receiving device 2. As a method other than acquisition of position information by GPS, latitude and longitude information may be designated from the position information input unit 25 having an input device such as a keyboard and stored in the position information storage unit 26. The related area information is extracted using the latitude and longitude information stored as described above.
[0059]
The extraction unit 27 extracts content information corresponding to the latitude and longitude information stored in the position information storage unit 26 from the content information stored in the buffer memory 23. The extracted content information is converted from a BML document, various mono media, a binary table, or the like into a data format that can be displayed on the display unit 28 based on the BML procedure, and output to the display unit 28. The extraction of the content information in the extraction unit 27 is performed using the search () function of the API described above. A specific extraction method using the search () function will be described in a first embodiment described later.
[0060]
The display unit 28 can display area information based on the designated latitude and longitude information by displaying the acquired BML document.
[0061]
Next, an embodiment of a method of generating a binary table based on a region according to the present invention will be described with reference to the drawings.
[0062]
(Example 1)
In the first embodiment, a method of converting region information for a region when a plurality of rectangular region regions corresponding to latitude and longitude exist into a binary table will be described. FIG. 4 is a diagram illustrating an example of two rectangular area regions.
[0063]
Here, in the embodiment, a case will be described in which the weather information at a specific point is displayed on the receiving device side. However, the content of the data broadcast that can be provided to the receiving device side in the present invention is not limited to this. Or service information from a store close to the receiving device.
[0064]
In FIG. 4, there are two local areas (area A and area B) having different weather information. Here, it is assumed that a “heavy rain warning” has been issued in the area A, and a “strong wind warning” has been issued in the area B. Further, the latitude and longitude of the point A1 at the upper left of the area A are "38 ° 10'20" north latitude and "135 ° 30'40" east longitude, and the latitude and longitude of the point A2 at the lower right are "37 ° 50 north latitude. "00""and" 137 ° 10'20 "east longitude.
[0065]
Regarding the area B, the latitude and longitude of the point B1 are "37 ° 00'00" north latitude and "133 ° 20'30" east longitude, and the latitude and longitude of the point B2 are 36 ° 50'00 north latitude. "And" 134 ° 10'20 "east longitude.
[0066]
At this time, each of the area A and the area B generates a rectangular area having two points (points) as corners, and generates a binary table based on the latitude and longitude ranges and encodes values in the range. .
[0067]
That is, the range of the values of the points A1, A2, B1, and B2 is determined by latitude and longitude, and a 7-digit postal code is directly converted into a binary table based on the postal code encoding system. For example, in the case of the area A, the rectangular area has a latitude range (37 ° 50′00 ″ to 38 ° 10′20 ″) and a longitude range (135 ° 30′40 ″ to 137 ° 10′20 ″). By forming a binary table in this range, the area information for the area A can be integrated, the data amount of the binary table can be reduced, and the transmission efficiency can be improved. Further, since a more detailed area setting than the postal code is possible, accurate area information about the specified area is extracted by the receiving device 2 and displayed on the display unit 28, so that the receiver obtains accurate area information. be able to.
[0068]
In addition, by limiting the area to be encoded by the binary table by latitude and longitude, it is possible to set a more flexible area than in the case of encoding using the postal code of the area.
[0069]
Here, an example of a binary table generated based on the first embodiment is shown in FIG. In the binary table shown in FIG. 5, a latitude range, a longitude range, and area information (area information) are tabulated. As shown in FIG. 5, for example, in the case of the area A, since the latitude range is stored as it is in the postal code range, when the number of digits is 7 digits, it becomes ($ 037-5000 to $ 038-1020). . In addition, since the binary table is searched based on the latitude and longitude specified by the receiving device 2, the latitude and longitude ranges are regarded as "degrees", "minutes" and "seconds" indicating the latitude and longitude as seven-digit numbers. In this case, it is preferable that the smaller value is the start position of the range and the larger value is the end position of the range.
[0070]
Similarly, for the longitude, a rectangular area including a latitude range and a longitude range is inserted into the area used for postal code encoding by encoding and inserting the range of longitude into the area used for postal code encoding. Can be generated.
[0071]
When a broadcast signal including a binary table as shown in FIG. 5 is transmitted from the transmission device 1, the reception signal is received by the reception device 2 and is included in the signal received based on the latitude and longitude stored in the position information storage unit 26. A search process is performed on the binary table to extract and output region information of a corresponding region. The search process is performed based on the search () function shown in FIG. Here, FIG. 6 shows an example of an argument setting to the search () function.
[0072]
In FIG. 6, for example, it is assumed that the latitude and longitude designated by the receiving apparatus 2 are "38 ° 00'25" north latitude and 136 ° 12'34 "east longitude. At this time, in FIG. 6, D1 indicates the position (startRow) of the record to start the search, and D2 indicates the latitude search condition. Here, in D2, "0" represents the position of the column in which the latitude range is encoded in the binary table, "380025" represents the latitude, "96" is the comparison condition, and Indicates that lines having “380025” included in the latitude range are to be extracted.
[0073]
Further, in the definition of the search () function in FIG. 1, since it is possible to repeatedly specify from the second argument to the fourth argument, D3 can be set as longitude information in the same manner as D2. D4 indicates a condition between repetition designations, where "false" represents "AND" and "true" represents "OR". D5 indicates a limit value of the number of records extracted as a result of searching the binary table. D6 indicates a location (array) where the extracted records are stored.
[0074]
Therefore, according to the settings shown in FIG. 6, the data of the row (region) to be extracted first among the rectangular areas including the points of "38 ° 00'25" north latitude and 136 ° 12'34 "east longitude are included. (Information) is stored in the resultArray. By executing the search shown in FIG. 6, when the value input from the receiving device 2 is included in the area A, the area information of the area A (“heavy rain warning is being issued”) is displayed on the display unit 28 by BML. Is displayed. If there is no extraction target, a message to that effect is displayed on the display unit 28.
[0075]
As a result, it is possible to classify the area with higher accuracy than the postal code, reduce the error in the area, and provide the receiver with accurate information. Further, by limiting the area to be encoded by the binary table by latitude and longitude, it is possible to set a more flexible area as compared with the case of encoding using the postal code of the area.
[0076]
Note that the order of the row items and the order of the column items in the above-described binary table are not limited to this, and any configuration may be used as long as the search () function can be used.
[0077]
In addition, the content of the area information field includes not only a character string indicating the specific content but also, as shown in an example of the substitution table in the present invention in FIG. Generate an alternative table that associates the ID with the area information, such as "alarm is being issued", store it in the location information storage unit 28, and enter only the ID in the area information field of the binary table. Accordingly, the amount of data to be transmitted can be further reduced, and the transmission efficiency can be improved.
[0078]
(Example 2)
Next, a method of generating a binary table in the case where there is a local area obtained by dividing one area into a plurality of rectangles will be described as a second embodiment.
[0079]
FIG. 8 is a diagram illustrating an example of a regional area obtained by dividing one area into a plurality of rectangles. In the areas 8A and 8B shown in FIG. 8, when the area is set by the single rectangle shown in the first embodiment, an error becomes large. Therefore, as shown in FIGS. A plurality of rectangles are set so as to approximate the original shapes (8A, 8B). That is, when encoding a region whose actual region information is not rectangular, the region is divided into a plurality of rectangular regions and approximated, and a binary table is generated for each rectangular region by the same method as in the first embodiment. The number of rectangles generated when dividing one area can be set arbitrarily.
[0080]
Next, FIG. 9 shows an example of a binary table corresponding to FIG.
[0081]
As shown in FIG. 9, by setting the latitude range and the longitude range corresponding to (1) to (11) in FIG. 8, it is possible to provide accurate area information in the area. Here, although the amount of data to be transmitted increases as compared with the first embodiment, errors in the local information can be reduced, and accurate local information can be obtained on the receiving device side. The receiving apparatus 2 performs the same processing as in the first embodiment, extracts the area information based on the latitude and longitude information specified by the extraction unit 27, and displays the desired area information on the display unit 28. .
[0082]
As described above, also in the case of the second embodiment, as described in the first embodiment, by inputting the ID using the substitution table into the regional information (area information), the amount of data to be transmitted can be reduced. Transmission efficiency can be improved.
[0083]
(Example 3)
The third embodiment is an example in which the above-described substitution table is also converted into a binary table, and two tables, a binary table of the substitution table and a binary table of the latitude and longitude information, are transmitted.
[0084]
Here, FIG. 10 is a diagram of an example of two binary tables generated for the area shown in FIG. In FIG. 10A, a binary table is generated similarly to the binary table shown in FIG. 9, but an ID corresponding to the substitute table in FIG. 10B is set in the area information field.
[0085]
In FIG. 10B, the area information corresponding to the ID and the detailed information of the area are input. The transmitting apparatus 1 encodes the binary tables shown in FIGS. 10A and 10B and transmits them, thereby comparing the alternative table described in the first embodiment with the method in which the position information storage unit 26 is stored in advance. Thus, the substitution table can be easily changed, and detailed information in real time can be generated. Thus, the receiving device 2 can extract and display detailed and accurate information.
[0086]
Note that the extraction unit 27 first performs extraction using the search () function described in the first embodiment, and then searches the binary table shown in FIG. 10B using the link destination ID of the acquired area information as an argument. As a result, it is possible to acquire the designated area information and the detailed information of the area.
[0087]
As described above, the amount of transmission data can be reduced, and the transmission efficiency can be improved.
[0088]
(Example 4)
In the fourth embodiment, when the area information is the same and one of the latitude and the longitude is the same, a plurality of ranges of the other area are input in the same record.
[0089]
According to the data broadcasting standard (ARIB STD-B24 Vol. 2), it is possible to set a plurality of ranges in a record in the same field, so that a plurality of rectangular areas can be input. Since it is not necessary to generate a record having the same area information and one of the same latitude and longitude as another record, the amount of data to be transmitted can be reduced and the transmission efficiency can be improved.
[0090]
Here, FIG. 11 shows an example of a regional area in the fourth embodiment. FIG. 12 shows an example of a binary table generated corresponding to FIG.
[0091]
As shown in FIG. 11, when there is a local area having the same local information (for example, “heavy rain warning is being issued” in FIG. 11) that is separated from the local area, for example, FIG. For the rectangle, the latitude range is the same and the longitude range is different (FIG. 11 (2) -1 and FIG. 11 (2) -2). In this case, as shown in FIG. A plurality of longitude ranges can be set in the same record. As a result, the number of records in the binary table can be reduced, and the data amount of the entire binary table can be reduced.
[0092]
By performing the same processing as in the first embodiment, the receiving device 2 can acquire more accurate regional information than when encoding a postal code. In addition, by limiting the area to be encoded by the binary table by latitude and longitude, it is possible to set a more flexible area than in the case of encoding using the postal code of the area.
[0093]
By encoding the area information corresponding to the latitude and longitude information using the binary table using the above-described embodiment, accurate area information and the like can be provided based on the position information specified on the receiving side.
[0094]
As described above, according to the present invention, the area to be encoded by the binary table is limited by the latitude and longitude, so that the area can be set more flexibly than in the case of encoding using the postal code of the area. Becomes possible.
[0095]
Further, as compared with the case where encoding is performed using a postal code, the present invention is superior in that it can cope with a receiving apparatus that dynamically changes due to mobile reception.
[0096]
As a method for encoding a rectangular area using latitude and longitude, four integers of Unsigned Integer type (unsigned integer) or Integer type (signed integer) are stored in a binary table (for example, x0, y0, x1, y1). ), And when the point (X, Y) is determined by the search API, the search is performed using four search conditions (x0 ≧ X, x1 ≦ X, y0 ≧ Y, and y1 ≦ Y). Although a method is possible, using the method shown in the embodiment is more effective in the following points.
[0097]
{Circle around (1)} As shown in the embodiment, the capacity of the binary table to be transmitted can be reduced.
[0098]
{Circle around (2)} Since it is sufficient to specify the two search conditions of latitude and longitude, the script description of the BML document can be simplified, and higher-speed ECMAScript processing can be expected.
[0099]
{Circle around (3)} When a receiving device specialized for a postal code search function frequently used in current data broadcasting is implemented, a higher processing speed can be expected.
[0100]
In addition, as for the number of rectangular divisions shown in the second to fourth embodiments, the point that the amount of encoded data increases when the number of divisions increases and that the error in the region increases when the number of divisions is too small. It is necessary to set in consideration of the following points. Therefore, a setting may be made so that division parameters are set in advance and division is automatically performed.
[0101]
Furthermore, the encoding method according to the present invention not only uses a BML document, but also uses, for example, a B-XML (Broadcast XML) document to create a DTD that defines a tag and a document structure for each application. And can provide a wide variety of information to recipients.
[0102]
Also, in the description of the present invention, a method of providing weather information to the receiving device as the regional information has been described. However, the regional information provided in the present invention is not limited to this, and may be, for example, a disaster such as an earthquake, , And an advertisement for the particular store can be displayed on a receiving device located several kilometers from a particular store.
[0103]
【The invention's effect】
As described above, according to the present invention, it is possible to obtain regional information corresponding to latitude and longitude information. Furthermore, since the acquired area information corresponds to the latitude and longitude information, accurate information can be acquired.
[0104]
Furthermore, efficient transmission can be performed by generating the binary table in the present invention.
[Brief description of the drawings]
FIG. 1 is a diagram showing an example of a definition of a search () function.
FIG. 2 is a diagram illustrating an example of a block configuration of a transmission device according to the present invention.
FIG. 3 is a diagram illustrating an example of a block configuration of a receiving device according to the present invention.
FIG. 4 is a diagram showing an example of two rectangular area regions.
FIG. 5 is an example of a binary table generated based on the first embodiment.
FIG. 6 is a diagram illustrating an example of setting an argument to a search () function.
FIG. 7 is a diagram illustrating an example of an alternative table according to the present invention.
FIG. 8 is a diagram illustrating an example of a regional area obtained by dividing one area into a plurality of rectangles.
FIG. 9 is a diagram illustrating an example of a binary table corresponding to FIG. 8;
FIG. 10 is a diagram illustrating an example of two binary tables generated for the area illustrated in FIG. 8;
FIG. 11 is a diagram illustrating an example of a regional area according to a fourth embodiment.
FIG. 12 is a diagram illustrating an example of a binary table generated corresponding to FIG. 11;
[Explanation of symbols]
1 transmitting device
2 Receiver
11 Position information data storage unit
12 Content related data storage unit
13 Binary table generator
14 Content Production Department
15 Encoding unit
16 Transmission section
17 Data server
21 Receiver
22 Decoding unit
23 buffer memory
24 GPS position acquisition unit
25 Location information input section
26 Location information storage
27 Extraction unit
28 Display

Claims (9)

In a transmission method in data broadcasting for transmitting both regional information corresponding to a region and a region designation code designating the region,
Converting a latitude and longitude information into the format of the area designation code in the data broadcast;
A transmission step of transmitting the latitude and longitude information converted in the conversion step and area information corresponding to the latitude and longitude information. In the conversion step,
The transmission method according to claim 1, wherein each of the latitude and longitude information is converted in correspondence with one of the area designation codes. The transmission method according to claim 1, wherein the area is designated by having at least two pieces of information of the latitude and longitude information. The said area information is the same, and when one of the said latitude and longitude information is the same, the said one latitude and longitude information is made to correspond to the other latitude and longitude information two or more, The Claims characterized by the above-mentioned. The transmission method according to any one of claims 1 to 3. Making the area information correspond to an ID,
The transmission method according to any one of claims 1 to 4, wherein the area information is transmitted after being inserted into another area in association with the ID. In a reception method for receiving a data broadcast having region information corresponding to a region and a region designation code in which a region is designated by latitude and longitude information,
A designation step of designating the area of the area information to be acquired by the latitude and longitude information;
An extracting step of extracting the area information based on the latitude and longitude information specified in the specifying step and the latitude and longitude information included in the received data broadcast. . In a transmitting apparatus for data broadcasting transmitting both area information corresponding to an area and an area designating code for designating the area,
A conversion unit that converts latitude and longitude information into the format of the area designation code in data broadcasting;
A transmitting unit that transmits the latitude and longitude information converted in the conversion step and area information corresponding to the latitude and longitude information. The conversion unit,
The transmission device according to claim 7, further comprising a table of regional information corresponding to the latitude and longitude information. In a receiving device that receives a data broadcast having region information corresponding to a region and a region designation code in which a region is designated by latitude and longitude information,
A designation unit for designating the region of the region information to be acquired by the latitude and longitude information;
An extractor for extracting the area information to be acquired based on the latitude and longitude information designated by the designation unit and the latitude and longitude information included in the received data broadcast. Receiving device.

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