JP2001056825A - Data distribution system and device used for the system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data distribution system which improves the grasping and visibility of the whole image of multimedia data(MM data) for a receiving terminal by generating output property data regarding the MM data and broadcasting them together with the MM data. SOLUTION: A data broadcasting device 1 generates the output property data of the MM data by a data analysis part 13. The output property data are present alone or incorporated in the MM data. The MM data and output property data are encoded by a protocol encoder part 14 and broadcasted by a transmitter part 15. A receiving terminal device 2 receives the broadcasted data by a tuner part 21 and obtains the MM data and output property data by a protocol decoder part 22. When the obtained MM data are displayed at a data display part 26, relative information of the MM data is also displayed by referring to the output property data. A data analysis part 24 analyzes the MM data to extract the incorporated output property data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data distribution system and an apparatus used for the same, and more particularly, to a method of broadcasting (transmitting) multimedia data from a transmitting apparatus by broadcasting or communication and broadcasting (transmitting) the data. The present invention relates to a system for receiving multimedia data in a receiving device and displaying the data on a screen, and a device used in the system.

[0002]

2. Description of the Related Art Conventionally, various terminal devices for acquiring and displaying provided multimedia data have been developed. For example, a terminal device used on the Internet acquires multimedia data in the following manner. First, the terminal device, according to the user's instruction,
Through the Internet, it directly accesses a WWW (World Wide Web) server in which multimedia data is stored in advance. Then, the terminal device searches and retrieves necessary multimedia data from the WWW server.
As described above, the method of obtaining multimedia data is mainly a method of freely searching and extracting target data from the user side, as represented by the Internet, a so-called pull type.

On the other hand, in recent years, demand for multimedia data distribution by broadcasting, which belongs to a push type which is a method of pushing data to a user side, is increasing. For example, data distribution by DAB (Digital Audio Broadcasting) developed in the EUUREKA-147 project in Europe corresponds to the push type. In such multimedia data distribution by broadcasting, a user can obtain necessary multimedia data by instructing a receiving terminal to specify a broadcasting channel to be received. That is, the necessary multimedia data is automatically received and displayed via the designated channel.
This allows the user of the receiving terminal to easily refer to the multimedia data with the same operational feeling as a conventional television or radio. As described above, multimedia data distribution by broadcasting has an advantage that it is not necessary to execute a process of searching and extracting necessary data.

[0004] However, the multimedia data distribution by the above-mentioned broadcasting is realized by real-time data distribution by a WWW server on the Internet (a distribution in which a data distribution response to a data reference request is possible in real time).
And different. Therefore, in multimedia data distribution by broadcasting, a broadcasting station cannot process a user's reference request in real time. Therefore, in multimedia data distribution by broadcasting, it is difficult for the user to control the contents of the multimedia data to be broadcast.

[0005] That is, in the form of data broadcasting,
Even if the user wants to refer to arbitrary multimedia data, it is difficult for the broadcast station to respond to the reference request one by one in real time. Therefore, in order to acquire multimedia data to be referred to, the user has to wait until the multimedia data to be referred to is broadcast in accordance with a predetermined broadcast program. Here, if data can be stored in the receiving terminal,
The user has already broadcasted (stored in the receiving terminal)
It is possible to refer to multimedia data locally. However, the data that can be stored in the receiving terminal is
Although it depends on the circuit size and cost of the terminal, it is only a small part of the data stored in the data broadcasting device on the broadcasting station side, even if it is considered common sense. Therefore, even though the multimedia data can be referred to locally, after all, the user receives and refers to the multimedia data in a fragmentary and time-series manner from the multimedia data existing in the data broadcasting device. You can only do it.

For example, the multimedia data to be referred to has an HTML (Hyper Text Markup Lang) having a link structure.
uage) format, it is difficult for the user to refer to the multimedia data until another multimedia data linked to the multimedia data (hereinafter referred to as linked data) is received. Further, when the link destination data does not exist in the data broadcasting device, for example, when the link destination data exists in an external WWW server, the user does not need to refer to the link destination data. I can't even know what it is.

[0007]

As described above, in multimedia data distribution by broadcasting, a user has to wait passively without knowing what multimedia data is to be broadcast. For this reason,
In multimedia data distribution by broadcasting, there is a problem that it is difficult for the user to grasp the whole image of the multimedia data to be broadcast, and it is difficult to determine which multimedia data is necessary. That is, the user:
Since it is not possible to immediately judge the necessity of the link destination data of the currently referred multimedia data, it is not possible to determine whether to save the currently referred multimedia data. This not only makes it difficult for the user to grasp the whole picture of the data, but also has an effect on an increase in the capacity of the storage device required for the terminal device that receives the data broadcast.

On the other hand, another problem caused by the inability to grasp the contents of the multimedia data to be broadcasted until it is received is a problem relating to the display attribute of the multimedia data. For example, JPEG (Joint Ph
otographic Experts Group) is a problem related to dither processing when displaying images. Note that this problem is not limited to data distribution in a broadcast mode, but also occurs in data distribution in a communication mode.

Mobile receiving terminals such as mobile phones and mobile terminals often cannot implement sufficient display capability due to cost restrictions and the like. For example, in a receiving terminal that can simultaneously display only up to 256 colors, JPEG data such as a photograph having a gradual gradation (hereinafter referred to as JPEG natural image data) has gradations displayed as stripes. Is very difficult to see. On the other hand, in this receiving terminal, JPEG data based on a line drawing such as a graph (hereinafter, referred to as JPEG line drawing data) is displayed with preferable contrast enhanced. JP is one of the techniques for displaying images smoothly.
There is a method of performing dither processing on EG data. By performing the dither processing, the JPEG natural image data is displayed as if it were close to the original image. However, if the JPEG line drawing data is subjected to the dither processing, the entire image becomes unclear (especially, the edge portion is unclear), and the display may be difficult to see because the details are crushed. Therefore, JP
For EG data, it is preferable to determine whether or not to perform dither processing according to the data type (natural image or line image) and display the image.

However, in the above-described multimedia data distribution by broadcasting, when the broadcasted multimedia data is displayed on the receiving terminal, one of the modes (with or without dither processing) predetermined by the receiving terminal.
To display the multimedia data. For this reason, multimedia data may be displayed in an undesirable mode.

Therefore, an object of the present invention is to generate in advance link information and image display information relating to multimedia data and broadcast (or transmit) the information together with the multimedia data, and also to enable the receiving terminal to perform multi-media processing. By providing a data broadcasting system, a data communication system, and an apparatus used in the system, the reception terminal manages the reception status of the media data to improve the visibility and the overall image of the multimedia data in the receiving terminal. is there.

[0012]

Means for Solving the Problems and Effects of the Invention In order to achieve the above object, the present invention has the following features. A first invention is a data broadcast system including a data broadcast device installed in a broadcast station that broadcasts multimedia data, and a receiving terminal device that receives the multimedia data broadcast from the data broadcast device. A data analysis unit that analyzes the contents of the multimedia data and generates output attribute data related to the multimedia data, and includes a corresponding output attribute data when broadcasting the multimedia data. A receiving unit that receives the broadcasted multimedia data and the output attribute data, and manages and stores the received multimedia data and the output attribute data. Multimedia data is output with its attribute information by referring to the data management unit and output attribute data And an that data output unit.

As described above, according to the first aspect, the data broadcasting device broadcasts the output attribute data together with the multimedia data, and the receiving terminal device transmits the attribute information obtained from the output attribute data to the multimedia. Output with media data. Therefore, for example, the user can know information on data linked to the broadcast multimedia data without receiving or analyzing the data.

[0014] A second invention is an invention according to the first invention, wherein the data broadcasting device further comprises a unit for incorporating the output attribute data generated by the data analysis unit into the multimedia data, The data transmitter broadcasts multimedia data in which output attribute data is incorporated.

As described above, according to the second aspect, the data broadcasting device incorporates the generated output attribute data into the multimedia data and broadcasts the data. Therefore, the receiving terminal device does not need to separately manage the multimedia data and the output attribute data, and can centrally manage the multimedia data. Thereby, the capacity of the storage device included in the receiving terminal device can be reduced. The receiving terminal device can also obtain output attribute data by referring to only the multimedia data to be displayed. Further, on the receiving terminal device side, output attribute data can be transferred at the same time only by transferring multimedia data.

A third invention is an invention according to the second invention, wherein the receiving terminal device extracts output attribute data embedded therein from the received multimedia data, and performs data management. A data extraction unit for outputting to the unit, the data management unit manages the output attribute data extracted by the data extraction unit separately from the corresponding multimedia data.

As described above, according to the third aspect, the receiving terminal device extracts the output attribute data embedded therein from the multimedia data, and separates the output attribute data from the multimedia data. Let me manage. Therefore, the multimedia data broadcast in a format in which the output attribute data is incorporated is stored in the receiving terminal device in the original form of the multimedia data. Therefore, it is possible to assure the user that the data stored in the receiving terminal device has not been altered. Also, the receiving terminal device can transfer multimedia data in the original form intended by the data provider.

A fourth invention is an invention according to the first invention, wherein the receiving terminal device analyzes the content of the received multimedia data, and newly outputs output attribute data relating to the multimedia data. The apparatus further includes a data analysis unit that generates the data.

As described above, according to the fourth aspect, the receiving terminal device analyzes the received multimedia data by itself and newly generates output attribute data. Therefore, it is possible to newly set (change) the output attribute data most suitable for the own device.

A fifth invention is an invention according to the first invention, wherein the data management unit further manages the reception status of the multimedia data, and the data output unit checks the reception status together with the output attribute data. For reference, the status of the data linked to the multimedia data is output.

As described above, according to the fifth aspect, the receiving terminal device outputs the status of the data linked on the screen based on the reception status of the multimedia data. Accordingly, the user does not follow a link that cannot be displayed, so that it is possible to prevent a troublesome operation (return operation when there is no link destination data) from occurring.

A sixth invention is an invention according to the first invention, wherein when the multimedia data is data in HTML format, the output attribute data includes data linked to the multimedia data. , And at least one of information on the number of linked data, its file name, the number of images included therein, or its data size.

The seventh invention is an invention according to the first invention, wherein, when the multimedia data is JPEG format data, the output attribute data includes the data type (natural image) of the multimedia data. Or a line drawing) or at least one piece of information on a recommended screen size suitable for the display thereof.

As described above, the sixth and seventh aspects of the present invention
It shows information of typical output attribute data in a specific multimedia data format. As in the sixth invention, when information about data linked to HTML format data is set as output attribute data, the user can determine the importance of information of data that has not been received. Also, as in the seventh invention, J
When the information about the image in the PEG format data is set as the output attribute data, the user can automatically display an appropriate JPEG image without manually setting, for example, dither processing.

An eighth invention is a data broadcasting device installed in a broadcasting station for broadcasting multimedia data, which analyzes the contents of the multimedia data and generates output attribute data relating to the multimedia data. A data analysis unit, and a data transmission unit that broadcasts multimedia data together with corresponding output attribute data when broadcasting the multimedia data.

A ninth invention is a invention according to the eighth invention, further comprising a unit for incorporating the output attribute data generated by the data analysis unit into the multimedia data, wherein the data transmission unit comprises: It is characterized by broadcasting multimedia data in which output attribute data is incorporated.

A tenth invention is an invention according to the eighth invention, wherein when the multimedia data is HTML format data, the output attribute data includes data linked to the multimedia data. , And at least one of information on the number of linked data, its file name, the number of images included therein, or its data size.

An eleventh invention is an invention according to the eighth invention, wherein when the multimedia data is JPEG format data, the output attribute data includes the data type (natural image) of the multimedia data. Or line drawing) or information about the recommended screen size for that display,
It is characterized by including at least one or more.

[0029] A twelfth invention is a receiving terminal device for receiving multimedia data to be broadcast accompanied by output attribute data, the receiving unit receiving the multimedia data to be broadcast and the output attribute data, A data management unit for managing and storing the received multimedia data and output attribute data, and a data output unit for referring to the output attribute data and outputting the multimedia data together with its attribute information.

A thirteenth invention is an invention according to the twelfth invention, wherein the output attribute data is embedded in the multimedia data from the received multimedia data when the output attribute data is embedded in the multimedia data. A data extraction unit that extracts the extracted output attribute data and outputs the data to the data management unit. The data management unit manages the output attribute data extracted by the data extraction unit separately from the corresponding multimedia data. It is characterized by doing.

A fourteenth invention is a invention according to the twelfth invention, wherein the data analysis unit analyzes the contents of the received multimedia data and newly generates output attribute data relating to the multimedia data. Is further provided.

A fifteenth invention is according to the twelfth invention, wherein the data management unit further manages the reception status of the multimedia data, and the data output unit manages the reception status together with the output attribute data. For reference, the status of the data linked to the multimedia data is output.

[0033] A sixteenth aspect of the present invention is a receiving terminal device for receiving broadcasted multimedia data, wherein the receiving unit receives the broadcasted multimedia data, and analyzes the contents of the received multimedia data. A data analysis unit that generates output attribute data related to the multimedia data, a data management unit that manages and stores the received multimedia data and the generated output attribute data,
A data output unit for referring to the output attribute data and outputting the multimedia data together with the attribute information.

As described above, the eighth to sixteenth inventions describe the data broadcasting device and the receiving terminal device constituting the data broadcasting system of the first to seventh inventions. As described above, the useful effects of the present invention can be achieved even with only the data broadcasting device or the receiving terminal device. In particular, the reception terminal device of the sixteenth invention analyzes the received multimedia data to generate output attribute data. Therefore, even when only multimedia data is broadcast (output attribute data is not broadcast),
The multimedia data stored inside the receiving terminal device can be output based on the output attribute data. Therefore, it becomes possible to transmit the output attribute data of the multimedia data to another terminal device by using the receiving terminal device as a relay station.

A seventeenth invention is a data communication system comprising a data communication device for transmitting multimedia data in JPEG format and a receiving terminal device for receiving the multimedia data transmitted from the data communication device. The data communication device includes a data analysis unit that analyzes the contents of the multimedia data and generates output attribute data related to the multimedia data, and attaches the corresponding output attribute data when communicating the multimedia data. A receiving unit that receives the transmitted multimedia data and the output attribute data, and manages and stores the received multimedia data and the output attribute data. Determine the display method of multimedia data by referring to the data management unit and the output attribute data And an that data output unit.

As described above, according to the seventeenth aspect, the data communication apparatus transmits the output attribute data together with the JPEG-formatted multimedia data, and the receiving terminal apparatus outputs Decide how to display the multimedia data. Therefore, the receiving terminal device starts the appropriate JPEG from the time when the data is first received.
Images can be displayed automatically.

An eighteenth invention is an invention according to the seventeenth invention, wherein the data communication device further comprises a unit for incorporating the output attribute data generated by the data analysis unit into the multimedia data, The data transmission unit transmits multimedia data having output attribute data incorporated therein.

As described above, according to the eighteenth aspect, the data communication device incorporates the generated output attribute data into multimedia data and transmits the multimedia data. Therefore, the receiving terminal device does not need to separately manage the multimedia data and the output attribute data, and can centrally manage the multimedia data. Thereby, the capacity of the storage device included in the receiving terminal device can be reduced. The receiving terminal device can also obtain output attribute data by referring to only the multimedia data to be displayed. Further, on the receiving terminal device side, output attribute data can be transferred at the same time only by transferring multimedia data.

A nineteenth invention is an invention according to the eighteenth invention, wherein the receiving terminal device extracts output attribute data embedded therein from the received multimedia data, and performs data management. A data extraction unit for outputting to the unit, the data management unit managing the output attribute data extracted by the data extraction unit separately from the corresponding multimedia data.

As described above, according to the nineteenth aspect, the receiving terminal device extracts the output attribute data embedded therein from the multimedia data, and separates the output attribute data from the multimedia data. Let me manage.
Therefore, the multimedia data transmitted in a format in which the output attribute data is incorporated is stored in the receiving terminal device in the original form of the multimedia data. Therefore, it is possible to assure the user that the data stored in the receiving terminal device has not been altered. Also, the receiving terminal device can transfer multimedia data in the original form intended by the data provider.

In a twentieth aspect, according to the seventeenth aspect, the data analysis section generates output attribute data indicating a data type (natural image or line image) of the multimedia data, and outputs the data. The unit determines whether or not the multimedia data is subjected to dither processing and displayed based on the data type.

A twenty-first invention is a invention according to the seventeenth invention, wherein the data analysis unit generates output attribute data indicating a recommended screen size suitable for displaying multimedia data, and the data output unit And determining whether or not to display the multimedia data by performing dither processing on the basis of a comparison result between the recommended screen size and the screen size for actually displaying the multimedia data.

As described above, according to the twentieth and twenty-first aspects, information on typical output attribute data in JPEG format multimedia data is shown.
Therefore, the receiving terminal device can automatically display an appropriate JPEG image from the time when data is first received, without manually setting dither processing.

A twenty-second invention is a data communication apparatus for communicating multimedia data in the JPEG format. The data communication apparatus analyzes the contents of the multimedia data and determines the type of the multimedia data (natural image or line image). Alternatively, when communication of multimedia data is performed with a data analysis unit that generates output attribute data including at least one piece of information about a recommended screen size suitable for the display, the corresponding output attribute data is transmitted together. A data transmission unit.

A twenty-third invention is a invention according to the twenty-second invention, further comprising: a unit for incorporating the output attribute data generated by the data analysis unit into the multimedia data; Multimedia data with output attribute data incorporated therein is transmitted.

According to a twenty-fourth aspect, in the JPEG format, information on a data type (natural image or line image) or a recommended screen size suitable for display is transmitted with output attribute data including at least one or more. A receiving terminal device for receiving multimedia data, a receiving unit for receiving transmitted multimedia data and output attribute data, and a data management unit for managing and storing the received multimedia data and output attribute data And a data output unit that determines a display method of the multimedia data with reference to the output attribute data.

A twenty-fifth aspect is the invention according to the twenty-fourth aspect, wherein the output attribute data is embedded in the multimedia data from the received multimedia data when the output attribute data is embedded in the multimedia data. A data extraction unit that extracts the extracted output attribute data and outputs the data to the data management unit. The data management unit manages the output attribute data extracted by the data extraction unit separately from the corresponding multimedia data. It is characterized by doing.

A twenty-sixth invention is a invention according to the twenty-fourth invention, wherein the data output unit determines whether or not to display the multimedia data by performing dither processing based on the data type. It is characterized by.

A twenty-seventh invention is a invention according to the twenty-fourth invention, wherein the data output unit sets the multimedia data based on a comparison result between the recommended screen size and the screen size for actually displaying the multimedia data. It is characterized in that it is determined whether or not data is subjected to dither processing and displayed.

A twenty-eighth invention is a receiving terminal device for receiving transmitted multimedia data in JPEG format, comprising: a receiving section for receiving transmitted multimedia data; and a receiver for receiving the contents of the received multimedia data. A data analysis unit that analyzes and generates output attribute data relating to a data type (natural image or line drawing) of the multimedia data, and data that manages and stores the received multimedia data and the generated output attribute data A management unit; and a data output unit that determines a display method of the multimedia data with reference to the output attribute data.

As described above, the twenty-second to twenty-eighth aspects of the present invention
The data communication device and the receiving terminal device constituting the data communication system according to the seventeenth to twenty-first inventions are described. As described above, the useful effects of the present invention can be achieved even with only the data communication device or the receiving terminal device. In particular, the twenty-eighth receiving terminal device analyzes the received multimedia data and generates output attribute data. For this reason, even when only the multimedia data is transmitted (output attribute data is not transmitted), the output method of the multimedia data stored inside the receiving terminal device is determined based on the output attribute data. Becomes possible. Therefore, it becomes possible to transmit the output attribute data of the multimedia data to another terminal device by using the receiving terminal device as a relay station.

[0052] A twenty-ninth invention is a recording medium recording a program to be executed in a computer device,
Receiving multimedia data and output attribute data associated with the multimedia data; managing and storing the received multimedia data and output attribute data; and And a step of outputting the media data together with the attribute information on the computer device.

A thirtieth invention is a recording medium recording a program to be executed in a computer device,
By analyzing the contents of the multimedia data in the JPEG format, the output attribute data containing at least one or more information on the data type (natural image or line drawing) of the multimedia data or the recommended screen size suitable for the display thereof is included. A program for realizing, on a computer device, an operating environment including a generating step and a step of transmitting the associated output attribute data when communicating multimedia data is recorded.

A thirty-first invention is a recording medium recording a program to be executed in a computer device,
Receiving JPEG-formatted multimedia data and output attribute data including at least one of the data type (natural image or line drawing) or information on a recommended screen size suitable for display; Recording a program for realizing, on a computer device, an operating environment including a step of managing and storing media data and output attribute data and a step of determining a display method of multimedia data based on the output attribute data are doing.

[0055]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a data broadcasting system according to one embodiment of the present invention. In FIG. 1, a data broadcasting system according to an embodiment of the present invention includes a data broadcasting device 1 that broadcasts multimedia data, receives the broadcasted multimedia data, and displays the multimedia data according to a user's instruction. And a receiving terminal device 2 for performing the operation.

First, a detailed configuration of the data broadcasting device 1 in the data broadcasting system according to one embodiment of the present invention will be described. With reference to FIG. 1, the data broadcasting device 1 includes a data storage unit 11, a file manager unit 12, a data analysis unit 13, a protocol encoder unit 14, and a transmitter unit 15. The file manager unit 12 manages data stored in the data storage unit 11. Further, the file manager unit 12 controls reading and writing of data in the data storage unit 11. The data analysis unit 13 is connected to the data storage unit 1 via the file manager unit 12.
Each of the multimedia data obtained from step 1 is analyzed to generate its output attribute data. The generated output attribute data is output to the file manager unit 12 and is stored in the data storage unit 1 in a predetermined form.
1 is stored. In the data storage unit 11, multimedia data and output attribute data are stored. This output attribute data is received by the receiving terminal device 2.
This data is referred to when displaying multimedia data. The output attribute data may be stored in the data storage unit 11 in a form in which the output attribute data is stored as a separate file in association with the corresponding multimedia data, or the output attribute data may be stored in the corresponding multimedia data. A form in which the data is stored in a format embedded in the data may be considered.

The multimedia data and the output attribute data output from the file manager unit 12 are subjected to a predetermined encoding process (for example, a multiplex encoding process in DAB) in the protocol encoder unit 14, and are transmitted to the transmitter unit 15. It is broadcast to the receiving terminal device 2 via the communication terminal. As a method of encoding the output attribute data, a method of encoding the output attribute data independently, a method of incorporating the output attribute data into the multimedia data, and encoding the same are conceivable.

Next, a detailed configuration of the receiving terminal device 2 in the data broadcasting system according to one embodiment of the present invention will be described. With reference to FIG. 1, the receiving terminal device 2 includes a tuner unit 21, a protocol decoder unit 22, a file manager unit 23, a data analysis unit 24, a data storage unit 25, and a data display unit 26. Tuner unit 2
1 receives encoded multimedia data and output attribute data broadcast from the data broadcasting device 1.
The protocol decoder unit 22 decodes the data received by the tuner unit 21 and restores the original multimedia data and output attribute data. These restored data are output to the file manager unit 23. The file manager 23 manages data stored in the data storage 25. Further, the file manager unit 23 controls reading and writing of data in the data storage unit 25. When the output attribute data is embedded in the multimedia data, the data analysis unit 24 separates the output attribute data from the multimedia data as necessary. When the output attribute data and the multimedia data are different files, the data analysis unit 24 incorporates the output attribute data into the multimedia data as needed. The data storage unit 25 stores multimedia data and output attribute data by the file manager unit 23. The stored data is read out by the file manager unit 23 at any time according to a user's instruction.
The contents are displayed on the data display unit 26. When multimedia data is displayed on the data display section 26,
The output attribute data corresponding to the multimedia data is referred to, and additional information based on the output attribute data is displayed at the same time.

Hereinafter, a method of generating, distributing and receiving output attribute data and displaying multimedia data using the output attribute data performed by the data broadcasting system according to one embodiment of the present invention will be further described with reference to FIGS. A specific description will be given. In an embodiment of the present invention, a method of generating each output attribute data will be described, taking HTML data as an example of multimedia data having a link structure and JPEG data as an example of image multimedia data. I do.

First, the relationship between the data will be described with reference to FIG. FIG. 2 shows the relationship between multimedia data used in the following description. Data 121 to data 123 are HTML data (extension [.html]). Data 124 and data 125 are JPEG data (extension [.jpg]). Data 126 to data 128 are output attribute data (extension is [.atr] in this example) generated from data 121, data 122, and data 125, respectively. The data 123 and the data 124 are external data. The data existing outside is, for example, multimedia data existing on the Internet when viewed from the data broadcasting device 1, and is not received when viewed from the receiving terminal device 2, that is, multimedia that is not stored in the data storage unit 25. It is data. Here, it is assumed that a link is set bidirectionally between the data 121 and the data 122, and a link is set from the data 122 to each of the data 123 to data 125 (in FIG. 2, the link relationship is indicated by an arrow). ).

FIG. 3 is a diagram showing an example of a table 130 for defining types of multimedia data. In the table 130 of FIG. 3, the multimedia data is provided with a data type ID and an abbreviation according to the type. The data type ID of the HTML data is “0”, and the abbreviation is “L”. This "L" is "LIN"
"K". The data type ID of the JPEG natural image data is “1”, and the abbreviation is “P”. This “P” is an initial of “PAINT”. The data type ID of the JPEG line drawing data is “2”, and the abbreviation is “D”. This “D” is an initial of “DRAW”. The numbers and characters used for these data type IDs and abbreviations are merely examples, and can be freely customized as long as the data broadcasting device 1 and the receiving terminal device 2 are matched.

In the data relation described above, a method of generating and managing output attribute data performed by the data broadcasting apparatus 1 in consideration of link information of HTML data and type information of JPEG data will be described with reference to FIGS. explain.
First, referring to FIG. 4, data broadcasting device 1 searches for multimedia data in data storage unit 11 (step S401), and outputs multimedia data for which output attribute data is to be generated (hereinafter, target multimedia data). Is determined (step S40).
2). The target determined in step S402 is basically multimedia data for which output attribute data has not yet been generated. However, when updating existing data, for example,
Multimedia data for which output attribute data has already been generated can also be targeted. If the target multimedia data exists in the determination in step S402, the data broadcasting device 1 creates an output attribute data table (step S403). On the other hand, if the target multimedia data does not exist in the determination in step S402, the data broadcasting device 1 ends this processing. The details of the output attribute data will be described later.

Next, the data broadcasting device 1 determines the type of the target multimedia data (step S404).
In step S404 of this embodiment, it is determined whether the multimedia data is in the HTML format, the JPEG format, or another format. If it is determined in step S404 that the target multimedia data is HTML data, the data broadcast device 1
Generates output attribute data in HTML format and sets it in the output attribute data table (step S405). If it is determined in step S404 that the target multimedia data is JPEG data, the data broadcasting device 1
Determines the image type of the JPEG data (whether it is a natural image or a line image; see FIG. 3) (step S4).
06). Then, the data broadcasting device 1 generates JPEG output attribute data based on the determined image type, and sets it in the output attribute data table (step S4).
07). On the other hand, if it is determined in step S404 that the target multimedia data is data other than HTML or JPEG, the data broadcasting device 1 proceeds to step S4.
03 is discarded (step S411), and the process returns to step S401 to search for the next multimedia data. Note that the type of multimedia data can be easily determined by an extension added to a file name in many cases.

Next, when the target multimedia data is HTML data, the data broadcasting device 1
A process for generating output attribute data relating to multimedia data (link destination data) linked to the L data is performed. With reference to FIG. 5, when the setting of the output attribute data of the target multimedia data (Step S405) is completed, the data broadcasting device 1 extracts information on the link destination data set in the target multimedia data (Step S501). ). And the data broadcasting device 1
Based on the extracted information, it is determined whether the link destination data exists inside or outside the data storage unit 11 (step S502) and whether the link destination data can be acquired (step S503). Step S
If the link destination data does not exist in the determination of 502, the data broadcasting device 1 proceeds to the process of step S408 without generating the output attribute data related to the link destination data. If it is determined in step S503 that the link destination data cannot be obtained, the process returns to step S501 to extract information on the next link destination data.

If the link destination data can be obtained in step S503, the data broadcasting device 1 obtains the link destination data and determines the type (step S504). In step S504 of this embodiment, the multimedia data is in HTML format, JP format.
It is determined whether the format is the EG format or another format. If it is determined in step S504 that the link destination data is HTML data, the data broadcasting device 1 analyzes the HTML data (step S50).
5) Output attribute data in HTML format is generated and set in the output attribute data table (step S507). In the determination of step S504, the link destination data is JP
If the data is EG data, the data broadcasting device 1
The image type of the data is further determined (step S50).
6). Then, the data broadcasting device 1 generates output attribute data in JPEG format based on the determined image type, and sets it in the output attribute data table (step S5).
07). On the other hand, if it is determined in step S504 that the link destination data is data other than HTML or JPEG, the data broadcasting device 1 returns to step S501 and extracts information on the next link destination data. The processing of steps S501 to S507 is performed for all link destination data included in the target multimedia data.

Referring again to FIG. 4, next, data broadcasting device 1 determines whether or not the set output attribute data is to be incorporated into the target multimedia data (step S408). It should be noted that whether or not to incorporate in this step S408 may be determined based on a flag or the like designated by the user, may be defined in the system in advance, or may be determined for each multimedia data. . Such a determination method can be arbitrarily determined by the system. The data broadcasting device 1 incorporates the output attribute data into the target multimedia data when it is determined to be incorporated in the determination of step S408 (step S409), and outputs the output attribute data when it is determined not to be incorporated. Is stored in the data storage unit 11 as a separate file (step S41).
0). Here, when the output attribute data is stored as a separate file, for example, the file name is set to the same file name as the target multimedia data and the extension is set to [.atr]. Can be associated with data.

Next, the structure of the output attribute data will be specifically described. FIG. 6 is a diagram illustrating a specific example of an output attribute data table that stores output attribute data.
The table 161 shown in FIG. 6A corresponds to the HT in FIG.
It is an output attribute data table showing the contents of output attribute data 127 [Base.atr] regarding ML data 122 [Base.html]. The HTML data 122 is HTML data as shown in FIG. The table 162 shown in FIG. 6B corresponds to the JPEG data 125 shown in FIG.
It is an output attribute data table showing the contents of output attribute data 128 [P2.atr] related to [P2.jpg]. Further, the table 163 shown in FIG.
Output attribute data 1 for L data 121 [Top.html]
26 is an output attribute data table showing the contents of 26 [Top.atr].

In the column direction of the table 161, a plurality of items recorded as output attribute data are shown. In the row direction of the table 161, output attribute data is recorded for each link destination data of the target multimedia data. The link ID is an identification code assigned to each link destination data of the HTML data 122. The link ID is managed by a serial number from "0",
In the link ID = 0, the output attribute data of the target multimedia data associated with the output attribute data table is specially recorded. That is, the table 16
The output attribute data of the HTML data 122 is recorded in the link ID = 0 of “1”. In addition, since the maximum value of the link ID in the table 161 is “42”, it can be seen that the HTML data 122 has links to 42 pieces of multimedia data. URL (Uniform Reso
In urce Locator), a character string indicating the storage location of the link destination data is recorded. This character string is set in a link tag indicated by “<A” and “</ A>” in HTML format data. In the data type, the value of the data type ID defined in the table 130 of FIG. 3 described above is recorded according to the type of the link destination data. The number of links
The number of links to multimedia data set in the link destination data is recorded. Link destination data is HTML
When the format is not the format, for example, in the case of JPEG data, the value recorded in the number of links is “0”. In the number of images, the number of images included in the link destination data is recorded. When the link destination data is not in the HTML format, for example, in the case of JPEG data, the value recorded in the number of images is “1”. For the data size, the data amount of the link destination data is 1
A value expressed in units of K bytes is recorded. From the table 161 in which the information of these link destination data is recorded, the HTM
The link destination data set in the L data 122 is 42
The URL of the link destination data, the data type, the number of links, the number of images, and the data size can be known by referring to the respective records.

Here, the HTML data 122 shown in FIG.
A specific example in which is analyzed will be described with reference to FIG.
First, in the record of link ID = 0, output attribute data of the HTML data 122 itself is recorded. From the output attribute data, it can be seen that the URL of the HTML data 122 is the file name [Base.html], the data type is HTML, the number of links is 42, the number of images is 23, and the data size is about 11 Kbytes. The fact that the data type is HTML can be easily determined from the extension [.html].
In the record of link ID = 0, the number of links =
42 matches the maximum value 42 of the link ID in the table 161, and the image number = 23 matches the number of records in the table 161 whose data type is 1 or 2. Next, the record of link ID = 1 contains HTML
Output attribute data of the link destination data corresponding to the link tag R1 in the data 122 is recorded. From this output attribute data, the link destination data of this link tag R1 is:
It can be seen that the data exists in the external WWW server and the data type is HTML. Whether the link destination data exists on the external WWW server can be easily determined from the URL [http: // www-]. In addition, linked data [Base1.html]
It can be understood from the analysis that the data [Base1.html] has 12 links, 5 images, and a data size of about 2 Kbytes. The number of links, the number of images, and the data size can be obtained by extracting image tags and link tags in the target HTML data and analyzing the contents specified there.

Next, the record of link ID = 2 contains H
Output attribute data of link destination data corresponding to the link tag R2 in the TML data 122 is recorded. From the output attribute data, the link destination data of the link tag R2 exists in the external WWW server, and the data type is JPE.
It turns out that it is G. Whether the data type is JPEG can be easily determined from the extension [.jpg]. Further, by analyzing the data [P1.jpg] of the link destination, the data [P1.jpg] is a natural image and the data size is 5K.
It turns out that it is about a byte. The data [P1.jp
g] is JPEG data, so the number of links is 0 and the number of images is 1. Note that the determination of the image type of JPEG data is as follows.
This is possible with a known technique used in image recognition. For example, whether the JPEG data is a line image or a natural image can be generally determined by the color density distribution of the image. This color density shows a rapidly changing distribution in a line image, and shows a gradual distribution in a natural image. Therefore, if the color density difference between adjacent pixels is calculated and an appropriate threshold is determined for determination, both determinations can be made. Next, in the record of link ID = 3, output attribute data of link destination data corresponding to the link tag R3 in the HTML data 122 is recorded. From the output attribute data, the link destination data of the link tag R3 exists in the data storage unit 11,
It can be seen that the data type is JPEG. The existence of the link destination data in the data storage unit 11 indicates that the U
It can be easily determined from [../~] of RL. Further, by analyzing the data [P2.jpg] at the link destination, it can be seen that the data [P2.jpg] is a line drawing and the data size is about 3 Kbytes. The data [P2.jpg] is JPEG
Since it is data, the number of links is 0 and the number of images is 1. Similarly, in the record of link ID = 42, output attribute data of the link destination data corresponding to the link tag R42 in the HTML data 122 is recorded. From the output attribute data, it is found that the link destination data of the link tag R42 exists in the data storage unit 11, and the data type is HTML. Furthermore, by analyzing the linked data [/Top.html], the data [/ To
p.html] has 74 links, 15 images, and a data size of about 2 Kbytes.

The table 163 shown in FIG.
9 is an output attribute data table showing the contents of output attribute data 126 [Top.atr] regarding HTML data 121 [Top.html] in FIG. The description of the contents of this table 163 will be omitted because it is obvious in the description of the table 161. However, the contents of the record with the link ID = 0 in the table 163 are the same as the table 161 except for the URL item.
Is the same as the record with link ID = 42. Since the table 161 and the table 163 have different entities (multimedia data) associated with the table, even if the description is about the same multimedia data, the notation of the URL is different in both tables. Also, the link ID of the table 163 =
The contents of the record 74 are the same as the record of the link ID = 0 in the table 161, except for the URL item.

The table 162 shown in FIG.
7 is an output attribute data table showing the contents of output attribute data 128 [P2.atr] regarding JPEG data 125 [P2.jpg] in FIG. Since the data [P2.jpg] is JPEG data, there is no link to other multimedia data. Therefore, the output attribute data is only the record of link ID = 0 indicating the content of the target multimedia data itself. The setting contents of the record with this link ID = 0 are as follows:
Except for the URL item, the table 16 shown in FIG.
It becomes the same as the record of link ID = 3 in 1.

By the way, as described in steps S409 and S410 of the flowchart shown in FIG. 4, the generated output attribute data is either incorporated into the target multimedia data or stored in a separate file. To save the output attribute data in a separate file,
By changing the extension part as described, it is possible to easily grasp which multimedia data file the output attribute data is stored in and the file is related to. Therefore, next, a method of incorporating the output attribute data into the multimedia data and storing the data will be described below.
This will be described below separately for the case of the PEG format.

First, a method of incorporating output attribute data into HTML data will be described. Referring to FIG.
Link tags R1, R2,..., R42 of L data 122
Is the link I in the table 161 shown in FIG.
.., 42, respectively. Further, the output attribute data 127 of FIG.
Table 161 shown in FIG. Data 701 shown in FIG. 7 includes output attribute data 1 in HTML data 122.
FIG. 27 is a diagram illustrating a result in which 27 is incorporated. Data 701
The underlined text portion is the embedded output attribute data. However, the underline is shown for explanation, and does not actually exist. The underlined portion (the portion between “<! −” And “−>”) is treated as a comment in the HTML format and is not displayed on the data display unit 26. In the example of the present embodiment, an ATR tag is newly defined in the comment part, and “<ATR>” is changed to “</ A
The output attribute data is embedded in a portion surrounded by TR>".
The output attribute data is surrounded by “[” and “]”, and “,”
It consists of four numbers separated by. These four numbers correspond to the setting items of the table 161 shown in FIG. 6A, the first item is the data type, the second item is the number of links, the third item is the number of images, and the fourth item is The data size. Output attribute data of data type = 0, number of links = 12, number of images = 5, data size = 2 is embedded in the link tag T1 of the data 701.

Next, a method of incorporating output attribute data into JPEG data will be described. In the format of JPEG data, there is an area called an application data segment for setting an arbitrary value other than image data and using the value. In the example of the present embodiment, the image type of the JPEG data described above is embedded in the area. The structure of the JPEG data is described in detail in, for example, the document "ITU-T White Book Recommendation Collection on Digital Still Image Compression Coding, New Japan ITU".

FIG. 8 is a diagram showing an example of an application data segment area in which the image type of JPEG data is embedded. In the area 810, a marker code indicating the meaning of the segment constituting the JPEG data is set in 2 bytes. According to the JPEG standard, “0xFF
It defines that 16 numbers from "E0" to "0xFFEF" can be used. In the example of the present embodiment, “0xFFEF” is used. In addition, the area 811
In, the data length of the application segment, that is, the total number of bytes of the area 812 and the area 813 is set to 2 bytes. In the example of this embodiment, the total number of bytes is 6 bytes. The area 812 includes the following area 8
A character code indicating that a flag indicating the image type of the JPEG data is set in the data No. 13 is set. In the example of the present embodiment, four characters “K, I, N, D” are set in four bytes. The area 813 contains JPEG
A numerical value indicating the image type of the data is set in two bytes. The value set in the area 813 is the data type of the JPEG data in the table 130 shown in FIG. In the example shown in FIG. 8, since this value is “1”, it can be seen that this JPEG data is a natural image.

The output attribute data and multimedia data described above are broadcast from the data broadcasting device 1 in a predetermined format (for example, DAB) and are received by the receiving terminal device 2. In DAB, MOT (Multimedia Objec) is used as the highest protocol for data transfer.
t Transfer). Hereinafter, the MOT protocol will be described.

FIG. 9 shows an MO that conforms to the MOT protocol.
FIG. 4 is a diagram showing a configuration of T data 911. MOT data 9
11, the MOT header 912 and the MOT header as shown in FIG.
And a body 913. MOT body 913
Is the multimedia data itself. The MOT header 912 describes the attribute of the data transferred by the MOT body 913, and sets the type of data, the file name of the data, and the like. In the receiving terminal device 2, the MOT
The data 911 is received, multimedia data is extracted from the MOT data 911, and appropriate processing is performed. In the example of this embodiment, the MOT body 913 includes the multimedia data 914 and the output attribute data 9 described above.
15 is set, and broadcasting is performed. As a result, the multimedia data existing in the data broadcasting device 1 and its output attribute data can be transferred to the receiving terminal device 2.

In the data broadcasting device 1, the multimedia data 914 and the output attribute data 915 are MOT
After being stored in the data 911, the data is further stored in the lower protocol (not shown) of the DAB and broadcast. In the receiving terminal device 2, the tuner unit 21 receives broadcast data. The protocol decoder unit 22 decodes the received broadcast data up to the MOT data 911, and extracts the MOT header 912 and the MOT body 913. Then, the protocol decoder unit 22 outputs the extracted MOT body 9
13, ie, the multimedia data 914 and the output attribute data 915 are output to the file manager unit 23.

Next, a method of displaying multimedia data in the receiving terminal device 2 using the received output attribute data will be described. Hereinafter, FIGS. 7 and 10 to 1
2, a method for displaying HTML data and JPEG data will be described as an example.

First, a method for displaying HTML data by using output attribute data relating to the HTML data will be described. Referring to FIG. 10, first, receiving terminal device 2
Analyzes the structure of the HTML data to be displayed and acquires various tag information (step S1001). At this time, at the same time, if the output attribute is set in the comment line of the anchor tag, the receiving terminal device 2 acquires it. Next, the receiving terminal device 2 checks whether the output attribute is set inside the HTML data (and the comment line of the anchor tag) (step S1002). If the output attribute has been set in the inspection in step S1002, the receiving terminal device 2 displays the output attribute in a predetermined format (step S1005). If there is an anchor tag, the receiving terminal device 2 displays the anchor tag and the output attribute in a predetermined format (step S100).
5). On the other hand, if the output attribute is not set in the inspection in step S1002, the receiving terminal device 2
It is determined that the output attribute of the L data is not set inside the HTML data, and it is further inspected whether another file having an extension of [.atr] and the same file name as the HTML data exists (step). S1003). And
If another file exists in the inspection in step S1003, the receiving terminal device 2 analyzes the output attribute data file to acquire the output attribute (step S1003).
4) The output attribute is displayed in a predetermined format (step S1005). However, if another file does not exist in the inspection in step S1003, the receiving terminal device 2
Only the anchor tag is displayed (step S1006).

Specifically, the display screen 702 of FIG. 7 displays the HTML data 122 without reference to the output attribute data 127.
Is an example in which is displayed. This kind of display is
For example, if the display data display unit 26 cannot determine the link tag of the output attribute described above, if the output attribute data 127 is not intentionally referred to, the output attribute data 1
27 does not exist. In this case, the display screen of the data display unit 26 like the display screen 702 includes HT
Information about the link destination data of the ML data 122 is not displayed at all.

On the other hand, the display screen 703 in FIG. 7 is an example in which the HTML data 122 is displayed with reference to the output attribute data 127. Here, the following two methods are used to display the HTML data 122 with reference to the output attribute data 127.
There are two ways. The first method is to use HTML data 122
This is a method of referring to the output attribute data 127 when the file and the output attribute data 127 exist in different files.
The second method is a method in which when the output attribute data 127 is incorporated in the HTML data 122, the output attribute data 127 inside the HTML data 122 is referred to.

First, the first method will be described. now,
The output attribute data 127 of the HTML data 122 is shown in FIG.
This is as shown in the table 161 of FIG. HTML
When displaying the link tags R1, R2,..., R42 of the data 122, the data display unit 26 outputs the output attribute data 127 recorded in a separate file as in the table 161.
See Thereby, P on the display screen 703
The attributes are displayed together with the contents of the link destination data, such as 1, P2,..., P42. For example, HTML data 12
The output attribute of the second link tag R1 is a value recorded in the link ID = 1 in the table 161. Display screen 70
The items indicated by P1, P2,..., P42 in No. 3 indicate the following. The alphabet of the first item represents the data type in the table 161. It is assumed that “L” is the data type “0”, that is, HTML data.
“P” indicates that the data type is “1”, that is, JPEG natural image data, and “D” indicates that the data type is “2”, that is, JPEG line drawing data. The numerical value of the second item indicates the number of links. The numerical value of the third item represents the number of images. The numerical value of the fourth item is
Indicates the data size.

Next, the second method will be described. When displaying T1, T2,..., T42 of the data 701, the data display unit 26 refers to the output attribute data 127 set inside the HTML data 122. As a result, the attributes are displayed together with the content of the link destination data, such as P1, P2,..., P42 on the display screen 703. For example, in T1 of the data 701, [0, 12,
[5, 2] is set, so on the display screen 703,
[L, 12, 5, 2] is displayed as indicated by P1.

As a result, the user can know the outline of the output attribute of the linked data without actually displaying the linked data of the currently referred multimedia data. Therefore, the user can efficiently refer to the data. That is, the receiving terminal device 2 knows the data type, the number of inks, the size, etc. if the output attribute data can be obtained even when the link destination data is not received or the link destination data is not present in the data broadcasting device 1. be able to. In the above-described embodiment, the output attribute of the related link destination data is displayed in the text format of characters or numerical values. It may be represented by an icon, voice, or the like.

The data broadcast from the data broadcasting device 1 is of three types: multimedia data itself, output attribute data, and multimedia data incorporating the output attribute data. However, the receiving terminal device 2
Then, these data are not simply stored in the data storage unit 25 and used for displaying on the data display unit 26. When the multimedia data and the output attribute data are different files, the receiving terminal device 2 may store the output attribute data in the data storage unit 25 after incorporating the output attribute data into the multimedia data. Conversely, in the case of multimedia data in which output attribute data is incorporated, the receiving terminal device 2 separates the output attribute data from the multimedia data and stores the multimedia data and the output attribute data as separate files. The information may be stored in the unit 25. Furthermore, the receiving terminal device 2 may generate new output attribute data using the data analysis unit 24 as needed. This processing is based on the HTML in which the output attribute data is embedded.
From the data, from the above “<! − <ATR>” to “<//
ATR >>->"and URL of link tag
Can be extracted and converted into an output attribute data table. Also, based on the output attribute data set inside the JPEG data, a table with only link ID = 0 is created, the file name of the JPEG data is written in the URL, and the marker code “0xFFE” is written in the data type.
The image type set to "F" and the number of images to "1"
In the data size, the size of the data file in units of 1 Kbyte may be recorded.

In the above description, a method has been described in which the type, the number of links, the size, and the like can be known in advance without displaying the link destination data. Then, by displaying the status of the linked data further,
A method for further improving user convenience will be described. As described above, the multimedia data received by the receiving terminal device 2 is classified into multimedia data existing in the data broadcasting device 1 and multimedia data existing outside the data broadcasting device 1 but not inside the data broadcasting device 1. Here, since the former multimedia data is sequentially broadcast in accordance with a broadcast program, the time at which it is received by the receiving terminal device 2 differs. Also, since the latter multimedia data is not broadcast data, it is necessary for the user to obtain it from outside according to a specified protocol. Therefore, the link destination data set in the multimedia data displayed on the screen by the receiving terminal device 2 includes: (1) data already received by the receiving terminal device 2 (2) not yet received by the receiving terminal device 2 Data (3) Broadcasting is classified into data not received by the receiving terminal device 2.

However, such a distinction does not appear on the display screen 703 of FIG. For example, when P3 corresponds to the data of (2) and P42 corresponds to the data of (1), the display of the “general menu” is executable but the “graph” is displayed.
Is not executable yet, the display screen 703 indicates
It does not reach the user from above. For this reason, the user can confirm whether or not the data has arrived only by executing the processing, and must perform an extra operation.

Therefore, the receiving terminal device 2 refers to the output attribute data described above and manages whether or not data has been received, so that the multimedia data can be stored in the above (1) to (4).
It is determined which of (3) is applicable. That is, the receiving terminal device 2 determines that the data is the multimedia data of (3) based on the URL [http: // www-],
It is determined that the multimedia data is (1) or (2) based on [../-] of RL and whether or not data is received. Then, the receiving terminal device 2 performs a screen display as shown in FIG. 11 according to the above-described determination. FIG.
In the example of (a), as the display relating to the link destination data of (2), when the selection cursor is set on the screen display, the character "data has not arrived" is displayed. Also, in the example of FIG. 11B, as the display related to the link destination data in (3), when the selection cursor is set on the screen display, the character “External data, connect?” Is displayed. Then, the characters "1: yes, 2: no" which can be selected and executed successively are displayed.

By displaying the status of the link destination data on the screen display in this way, the user does not follow the link destination that cannot be displayed, so that the user is troublesome operation (return operation when there is no link destination data). Can be prevented beforehand. In the above embodiment,
Although the case where the status of the link destination data is displayed in characters has been described, audio may be output. Further, the display may be shaded regardless of the position of the selection cursor.

Next, a method of displaying the JPEG data using the output attribute data relating to the JPEG data will be described. Referring to FIG. 12, first, receiving terminal device 2
Indicates that the image type (output attribute data) of the JPEG data is J
It is checked whether it is incorporated in the PEG data (step S1201). As shown in FIG. 8, the information of the image type is the marker code “0xF” in the JPEG data.
Since the application data segment is set to “FEF”, the receiving terminal device 2 inspects the areas 811 to 813 of this segment. If the “KIND” item is set in the area 812 in the inspection in step S1201, the receiving terminal device 2 extracts the value in the area 813 and sets it as the image type of the JPEG data (step S1202). On the other hand, when the “KIND” item is not set in the area 812, the receiving terminal device 2
It is determined that the image type of the G data is not set in the JPEG data, and it is further checked whether another file having the extension [.atr] and the same file name exists (step S1203). Then, the receiving terminal device 2 performs step S
In the inspection at 1203, if another file exists, the image type of the JPEG data is obtained from this file and set (step S1204). If another file does not exist, the image type is changed to line drawing as default processing. 2 "(step S1205). Then, after the image type of the JPEG data is set, the receiving terminal device 2 decodes the JPEG data (step S1).
206). Thereafter, the receiving terminal device 2 refers to the set image type (Step S1207). When the image type is “1”, that is, when the image type is a natural image, the receiving terminal device 2 performs dither processing on the decoded image, and displays the image on the data display unit 26 (step S120).
8) If not, the decoded image is displayed on the data display unit 26 as it is (step S120).
9).

As described above, the output attribute data relating to the JPEG data is broadcast independently or embedded in the JPEG data, so that the receiving terminal device 2 which has received the data performs image display according to the data type. Can be. The output attribute data described here is
Since it is set in an area (application data segment) to be arbitrarily referred to in JPEG data,
In a configuration for performing JPEG display other than this embodiment,
It is possible to display an image without any problem.

By the way, the data broadcasting device 1
The case where the output attribute data set on the side is used has been described. However, in the present data broadcasting system, the receiving terminal device 2 includes the data analysis unit 24. Thereby, even when only the multimedia data is broadcast (the output attribute data is not broadcast), the receiving terminal device 2 newly outputs the output attribute data based on the multimedia data stored therein. Can be generated. Further, the receiving terminal device 2 can change the content of the output attribute data broadcast from the data broadcasting device 1 as necessary. Hereinafter, as an example, a case will be described in which the setting relating to the dither processing of the JPEG data is changed.
As a method of setting the output attribute data of the JPEG data on the receiving terminal device 2 side, first, a method of changing the output attribute data incorporated in the JPEG data, and second, an output set in a file different from the JPEG data There is a method of changing attribute data, and a third method of deleting output attribute data embedded in JPEG data.

First, the first method will be described with reference to FIG. When displaying an image of JPEG data, the receiving terminal device 2 determines whether or not to perform dither processing (step S1301). The determination in step S1301 is made based on whether the receiving terminal device 2 has a high-resolution display screen that does not require dither processing, whether it is necessary to eliminate the processing load associated with dither processing, and the like. If it is determined in step S1301 that dither processing is to be performed, the receiving terminal device 2 regards this JPEG data as a natural image, and stores the JPEG data in the image type area of the application data segment whose marker code in the JPEG data is “0xFFEF”. “1” is set (step S1302). On the other hand, if it is determined in step S1301 that dither processing is not to be performed, the receiving terminal apparatus 2
Regards this JPEG data as a line drawing and sets "2" in the image type area (step S130).
3).

The above-mentioned second method corresponds to step S1 in FIG.
In 302 and S1303, this is realized by changing the data type of the output attribute data stored in a separate file to the above-described image type. The third method is as follows:
In steps S1302 and S1303 of FIG. 13, the marker code in the JPEG data is “0xFFE”.
After deleting the application data segment "F", the output attribute data in which the regarded image type is recorded is created. To change the setting so that dither processing is not performed, it is only necessary to delete the application data segment (it is possible to return to the original JPEG data).

As described above, by setting the output attribute data for a JPEG image in the data broadcasting device 1 and referring to it when displaying it on the receiving terminal device 2 side, a more visible JPEG image can be displayed. Also, by changing the output attribute data set in the JPEG image on the receiving terminal device 2 side, the JPEG data is stored in the receiving terminal device 2 in the original format in which the information added on the data broadcasting device 1 is removed. it can. Also, the receiving terminal device 2
PEG data can be redistributed in the original format.

Next, another method for displaying JPEG data using output attribute data relating to JPEG data will be described. Now, consider a case where the receiving terminal device 2 is a mobile phone. As is well known, the display screen of a mobile phone tends to become larger year by year, but there is a limit to the size of the display screen so as not to impair the portability of the mobile phone. Therefore, the user not only displays the received data on a small screen of the mobile phone to view the data, but also connects the mobile phone to a personal computer, a car navigation system, or the like (hereinafter, referred to as a display device) and enlarges and displays the data on those large screens. In some cases, let me see it.

However, the data that can be received by a mobile phone is
It is generally made according to the standard display screen size of a mobile phone. For this reason, as described above, when data that is intended to be received and used by a mobile phone is displayed on a large screen of a display device while being enlarged and viewed, the following problems occur. 1. When the number of pixels on the display screen of the display device is larger than the number of pixels of the received image, the received image is displayed small on the display screen without being enlarged. 2. When the pixels of the display device are coarse, the received image is displayed with jagged lines or the like even if it is enlarged. Here, 1. In order to solve the problem (1), it is conceivable to allocate one pixel of the received image to a plurality of pixels of the display device to enlarge the image. Problem occurs. In other words, when viewing data that is premised on reception and use by a mobile phone on a large screen of a display device and viewing it, Problem will occur. When such a problem occurs, the gradation of the natural image is displayed step by step, which is not beautiful. Line drawings sometimes have conspicuous jagged lines.

Therefore, the receiving terminal device 2 performs the following processing. Referring to FIG. 14, receiving terminal device 2 first displays the received image on the screen (step S140).
1). Whether or not the image to be displayed on the screen is subjected to dither processing in step S1401 is determined by the receiving terminal device 2
May be determined according to a default process predetermined in the above, or the above-described output attribute data (which may be generated by either the data broadcasting device 1 or the receiving terminal device 2)
May be determined according to the following. Next, the user determines whether or not the image is preferably displayed on the screen (step S1402). Here, whether the display is preferable or not
The user himself / herself may judge based on whether the gradation of the natural image is displayed stepwise and a stripe pattern is generated, the jaggedness of the line image is conspicuous, or the entire image is blurred and difficult to see. The result of this determination is made by the user instructing the display device (for example, input operation using a remote controller or the like). When receiving an instruction that the display is not preferable from the user, the receiving terminal device 2 determines whether or not the displayed image has been subjected to dither processing (step S1).
403). Then, the receiving terminal device 2 cancels the dither processing when the image has been subjected to the dither processing (step S1404), and performs the dither processing when the image has not been subjected to the dither processing (step S1404). Step S140
5) The image is displayed again (step S1406). This allows the user to view the image in a preferred display.

The receiving terminal device 2 may determine the display screen size of the display device to determine whether or not to perform dither processing on the image. First, the data broadcasting device 1
Generates output attribute data that gives a recommended display screen size that allows preferable display without performing dither processing on the image. This output attribute data is JPEG as described above.
It may be created in a file separate from the data, or may be incorporated in the JPEG data. In the latter case, the data broadcasting device 1 sets the marker code of the segment storing the output attribute data to “0xFFE” as shown in FIG.
E ". Then, the data broadcasting device 1 stores the vertical size and the horizontal size of the recommended display screen size in the area of the application segment whose marker code is “0xFFEE”.

When receiving the output attribute data giving the recommended display screen size, the receiving terminal device 2 performs the following processing. Referring to FIG. 16, first, receiving terminal device 2 acquires the display screen size of the display device (step S1601). The receiving terminal device 2 may obtain the display screen size from the display device via a unique interface. Next, the receiving terminal device 2 analyzes the output attribute data related to the received image and acquires a recommended display screen size (step S1602). Then, the receiving terminal device 2 compares the display screen size of the display device with the recommended display screen size (step S160).
3). If the display screen size of the display device is larger than the recommended display screen size in step S1603, the receiving terminal device 2 performs dither processing on the received image (step S1604), and then displays the screen (step S1604).
1605). On the other hand, if the display screen size of the display device is smaller than the recommended display screen size in step S1603, the receiving terminal device 2 displays the received image on the screen without performing dither processing (step S160).
5). Note that, after displaying the image on the screen in step S1605, the image is further displayed in steps S1402 to 1406 in FIG.
May be performed so that the user can select image display.

Note that the dither processing is particularly effective when viewing an image on a large screen, but may also be effective when viewing on a small screen such as a mobile phone. Usually, in order to display more characters in a limited screen size, it is conceivable to reduce the number of pixels used per character. However, in a mobile phone, the number of pixels per character in text display is fixed. Here, if the character information is displayed not in a text but in a graphic such as a JPEG image, it is possible to display more characters using small characters. However, if the characters are too small, the characters may be crushed and cannot be distinguished. Therefore, by performing dither processing on a small character, even a small character that is crushed can be displayed with a faint outline of the character, which may make it easier for the user to distinguish the character. .

As described above, according to the data broadcasting system according to one embodiment of the present invention, the receiving terminal device 2 receives the multimedia data and the output attribute data broadcast from the data broadcasting device 1 and It is stored and managed in the display. In addition, processing of multimedia data, such as generating output attribute data from multimedia data and incorporating the output attribute data into multimedia data, is also performed.

When the receiving terminal device 2 is a system that distributes multimedia data to another receiving terminal device (when the receiving terminal device 2 has a relay station function, etc.) Alternatively, the data analysis unit 24 of the receiving terminal device 2 may have a function of generating output attribute data. In this case, the data broadcast device 1 does not necessarily need to generate output attribute data, and can broadcast only multimedia data.

The method for providing the display attribute of the JPEG data from the transmitting side to the receiving side, that is, the method of providing the presence / absence information of the dither processing corresponding to the natural image / line image, is not limited to the data broadcasting described in the present embodiment. It can be widely used for general data communication. In particular, this method is effective for a receiving terminal device with low performance.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a data broadcasting system according to one embodiment of the present invention.

FIG. 2 is a diagram illustrating an example of a relationship between multimedia data.

FIG. 3 is a diagram illustrating an example of a table 130 that defines a multimedia data type.

FIG. 4 is a flowchart illustrating an example of a process performed by the data broadcasting device 1 to generate output attribute data from multimedia data.

FIG. 5 is a flowchart illustrating an example of a process performed by the data broadcasting device 1 to generate output attribute data from multimedia data.

FIG. 6 is a diagram illustrating an example of an output attribute data table that stores output attribute data.

FIG. 7 is a diagram showing a state in which output attribute data is incorporated into HTML data and an example of a screen display thereof.

FIG. 8 is a diagram illustrating an example of a state in which output attribute data is incorporated into JPEG data.

FIG. 9 is a diagram showing a configuration of MOT data 911.

FIG. 10 is a flowchart illustrating an example of a process of displaying HTML data using output attribute data performed by the receiving terminal device 2;

FIG. 11 is a diagram showing an example of a display screen displayed on the data display unit 25.

FIG. 12 is a flowchart illustrating an example of a process of displaying JPEG data using output attribute data performed by the receiving terminal device 2.

FIG. 13 is a flowchart illustrating an example of processing performed by the receiving terminal device 2 to set an output attribute of JPEG data.

FIG. 14 is a flowchart illustrating an example of a process of displaying JPEG data performed by the receiving terminal device 2.

FIG. 15 is a diagram illustrating an example of a state in which output attribute data is incorporated into JPEG data.

FIG. 16 is a flowchart illustrating an example of a process performed by the receiving terminal device 2 to display JPEG data using output attribute data.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Data broadcasting device 2 ... Receiving terminal device 11, 25 ... Data storage part 12, 23 ... File manager part 13, 24 ... Data analysis part 14 ... Protocol encoder part 15 ... Transmitter part 21 ... Tuner part 22 ... Protocol decoder part 26 ... Data display parts 121-125, 914 Multimedia data 126-128, 915 Output attribute data 130, 161-163 ... Table 701 ... Data 702, 703 ... Display screen 810-813 ... Area 911 ... MOT data 912 ... Header 913: MOT body

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G06F 13/00 540 G06F 13/00 540F 550 550A H04H 1/00 H04H 1/00 B H04N 5/44 H04N 5 / 44 Z

Claims (31)

[Claims] 1. A data broadcasting system comprising a data broadcasting device installed in a broadcasting station for broadcasting multimedia data, and a receiving terminal device receiving the multimedia data broadcasted from the data broadcasting device. A data analysis unit configured to analyze the contents of the multimedia data to generate output attribute data related to the multimedia data; and to output the corresponding output attribute when broadcasting the multimedia data. Data receiving means for transmitting the multimedia data and the output attribute data to be broadcast; and receiving the multimedia data and the output. Data management means for managing and storing attribute data; and the output attribute data. And, and a data output means for outputting with the attribute information the multimedia data, the data broadcasting system. 2. The data broadcasting device further comprises means for incorporating the output attribute data generated by the data analyzing means into the multimedia data, and wherein the data transmitting means has the output attribute data therein. The data broadcasting system according to claim 1, wherein the multimedia data in which data is embedded is broadcast. 3. The receiving terminal device further comprises: a data extracting unit that extracts the output attribute data embedded therein from the received multimedia data and outputs the output attribute data to the data management unit. 3. The data management unit according to claim 2, wherein the output attribute data extracted by the data extraction unit is managed separately from the corresponding multimedia data.
2. A data broadcasting system according to item 1. 4. The reception terminal device according to claim 1, further comprising a data analysis unit that analyzes the content of the received multimedia data and newly generates the output attribute data related to the multimedia data. Data broadcasting system as described. 5. The data management unit further manages a reception status of the multimedia data, and the data output unit refers to the reception status together with the output attribute data to link to the multimedia data. 2. The data broadcasting system according to claim 1, wherein the data broadcasting system outputs the status of the data. 6. When the multimedia data is HTML format data, the output attribute data includes, for data linked to the multimedia data, the number of data further linked to the multimedia data, At least one file name, information on the number of images included in the file name, or information on the data size is included.
The data broadcasting system according to claim 1. 7. When the multimedia data is JPEG format data, the output attribute data includes a data type (natural image or line drawing) of the multimedia data or a recommended screen size suitable for the display. 2. The data broadcasting system according to claim 1, wherein at least one piece of information is included. 8. A data broadcasting device installed in a broadcasting station that broadcasts multimedia data, wherein the data analyzing unit analyzes contents of the multimedia data and generates output attribute data related to the multimedia data. A data broadcasting device, comprising: data broadcasting means for broadcasting the multimedia data together with the corresponding output attribute data when broadcasting the multimedia data. 9. The multimedia data further includes means for incorporating the output attribute data generated by the data analysis means into the multimedia data, wherein the data transmission means includes the output attribute data incorporated therein. 9. The data broadcasting device according to claim 8, wherein multimedia data is broadcast. 10. The multimedia data may be HTML.
If the data is in a format, the output attribute data includes, for the data linked to the multimedia data, the number of data further linked to the multimedia data, the file name thereof, the number of images included therein, or Characterized in that at least one or more information about the data size is included,
The data broadcasting device according to claim 8. 11. The multimedia data is JPEG.
Format data, the output attribute data includes at least one or more information on the multimedia data regarding its data type (natural image or line drawing) or a recommended screen size suitable for its display. 9. The data broadcasting device according to claim 8, wherein: 12. A receiving terminal device for receiving multimedia data to be broadcast with output attribute data attached thereto, comprising: receiving means for receiving the multimedia data to be broadcast and the output attribute data; A data management means for managing and storing the multimedia data and the output attribute data, and a data output means for referring to the output attribute data and outputting the multimedia data together with the attribute information. apparatus. 13. When the output attribute data is embedded in the multimedia data, the output attribute data embedded in the multimedia data is extracted from the received multimedia data. Further comprising data extraction means for outputting to the management means, wherein the data management means manages the output attribute data extracted by the data extraction means separately from the corresponding multimedia data, Claim 1
3. The receiving terminal device according to 2. 14. The receiving terminal device according to claim 12, further comprising a data analyzing unit that analyzes the content of the received multimedia data and newly generates the output attribute data relating to the multimedia data. 15. The data management unit further manages a reception status of the multimedia data, and the data output unit refers to the reception status together with the output attribute data to link to the multimedia data. 13. The receiving terminal device according to claim 12, wherein the receiving terminal device outputs a state of the data being performed. 16. A receiving terminal device for receiving broadcasted multimedia data, comprising: receiving means for receiving the broadcasted multimedia data; and analyzing the content of the received multimedia data. Data analysis means for generating output attribute data related to multimedia data; data management means for managing and storing the received multimedia data and the generated output attribute data; and A data output unit for outputting the multimedia data together with the attribute information thereof. 17. A data communication system comprising: a data communication device for transmitting multimedia data in JPEG format; and a receiving terminal device for receiving the multimedia data transmitted from the data communication device, A data analysis unit configured to analyze contents of the multimedia data to generate output attribute data related to the multimedia data; and, when communicating the multimedia data, attach the corresponding output attribute data. And a data transmission unit for transmitting the multimedia data and the output attribute data to be transmitted, the reception terminal device receiving the multimedia data and the output attribute data, Data management means for managing and storing data, and referring to the output attribute data. , And a data output means for determining a method of displaying the multimedia data,
Data communication system. 18. The data communication device further comprises: means for incorporating the output attribute data generated by the data analysis means into the multimedia data, wherein the data transmission means includes the output attribute data therein. The data communication system according to claim 17, wherein the multimedia data in which data is embedded is transmitted. 19. The receiving terminal device further includes: a data extracting unit that extracts the output attribute data embedded therein from the received multimedia data and outputs the output attribute data to the data management unit. 2. The data management unit manages the output attribute data extracted by the data extraction unit separately from the corresponding multimedia data.
9. The data communication system according to 8. 20. The data analysis unit generates the output attribute data indicating a data type (natural image or line drawing) of the multimedia data, and the data output unit generates the output attribute data based on the data type. 18. The data communication system according to claim 17, wherein it is determined whether or not the media data is to be displayed after being subjected to dither processing. 21. The data analysis means generates the output attribute data indicating a recommended screen size suitable for displaying the multimedia data, and the data output means actually converts the recommended screen size and the multimedia data. 18. The data communication system according to claim 17, wherein a decision is made as to whether or not the multimedia data is to be displayed after being subjected to dither processing, based on a comparison result with a screen size to be displayed. 22. A data communication device for performing communication of multimedia data in JPEG format, wherein the content of the multimedia data is analyzed and the data type (natural image or line drawing) of the multimedia data or its display is displayed. A data analysis unit for generating output attribute data including at least one piece of information about a recommended screen size suitable for: a data to be transmitted with the corresponding output attribute data when communicating the multimedia data A data communication device comprising: a transmission unit. 23. The apparatus further comprising: means for incorporating the output attribute data generated by the data analysis means into the multimedia data, wherein the data transmitting means includes the output attribute data incorporated therein. 23. The data communication device according to claim 22, transmitting multimedia data. 24. JPEG-formatted multimedia data to which information about a data type (natural image or line image) or a recommended screen size suitable for display is transmitted together with output attribute data including at least one or more information. A receiving terminal device that receives the multimedia data and the output attribute data to be transmitted, and a data management unit that manages and stores the received multimedia data and the output attribute data And a data output unit that determines a display method of the multimedia data with reference to the output attribute data,
Receiving terminal device. 25. When the output attribute data is embedded in the multimedia data, the output attribute data embedded in the multimedia data is extracted from the received multimedia data. Further comprising data extraction means for outputting to the management means, wherein the data management means manages the output attribute data extracted by the data extraction means separately from the corresponding multimedia data, Claim 2
5. The receiving terminal device according to 4. 26. The data output means determines whether or not to display the multimedia data by performing dither processing based on the data type,
The receiving terminal device according to claim 24. 27. The data output means determines whether to perform dither processing on the multimedia data and display the multimedia data based on a comparison result between the recommended screen size and a screen size for actually displaying the multimedia data. The receiving terminal device according to claim 24, wherein the receiving terminal device is determined. 28. A receiving terminal device for receiving transmitted multimedia data in JPEG format, comprising: a receiving means for receiving the transmitted multimedia data; and analyzing the contents of the received multimedia data. Means for generating output attribute data relating to the data type (natural image or line drawing) of the multimedia data; and data for managing and storing the received multimedia data and the generated output attribute data. Management means, comprising: a data output means for determining a display method of the multimedia data with reference to the output attribute data,
Receiving terminal device. 29. A recording medium recording a program to be executed in a computer device, comprising: receiving multimedia data and output attribute data associated with the multimedia data; and receiving the multimedia data. And managing the output attribute data and storing the multimedia data together with the attribute information by referring to the output attribute data. Recording medium on which the program of the above is recorded. 30. A recording medium on which a program to be executed in a computer device is recorded, wherein the content of the multimedia data in JPEG format is analyzed to determine the data type (natural image or line drawing) of the multimedia data or the data type thereof. A step of generating output attribute data including at least one or more information regarding a recommended screen size suitable for display; and a step of transmitting the multimedia data together with the corresponding output attribute data when communicating the multimedia data. A recording medium on which a program for realizing an operating environment including the above on a computer device is recorded. 31. A recording medium on which a program to be executed in a computer device is recorded, wherein JPEG-formatted multimedia data and information on its data type (natural or line drawing) or a recommended screen size suitable for display are stored. Receiving at least one output attribute data, managing and storing the received multimedia data and the output attribute data, and receiving the multimedia data based on the output attribute data. Recording a program for realizing, on the computer device, an operating environment including a step of determining a display method of the above.