JP2010166407A - Device, device and program for obtaining program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a program obtaining device capable of selectively obtaining only a non-obtained program fitly from among programs indispensable for applications to be used by a receiver during data broadcast. <P>SOLUTION: The program obtaining device includes: a program holding section for holding obtained programs; an indispensable list obtaining section for obtaining, from information received via a receiving section, a list of indispensable programs which are programs essential to execute applications contained in data broadcast; a lacked program determining section for determining a lacked indispensable program by collating the list of indispensable programs obtained by the indispensable list obtaining section with the obtained programs held in the program holding section; and a program obtaining section for obtaining, via the receiving section, the lacked indispensable program determined by the lacked program determining section. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a program acquisition apparatus and a program acquisition program for acquiring a program necessary for executing an application in data broadcasting, and further relates to a program updating apparatus for updating a native code required for executing an application in data broadcasting.

  In recent years, programs using Java (registered trademark) technology have been used for data broadcasting in foreign countries and the like and are expected in the future in Japan. Many conventional programming languages were designed on the assumption that they were compiled into native code that depends on the platform such as the CPU, but Java technology was developed with attention to platform independence and compatibility between versions. It has been advanced. Therefore, unlike many conventional programming languages, Java technology programs are designed to be compiled into an intermediate language byte code and executed in a Java virtual machine. In many cases, a just-in-time compilation method is used. By using Java technology, development and implementation of application software that is less dependent on the platform are being realized.

  The goals of platform independence and compatibility between versions in Java technology have not been fully achieved and challenges remain. In data broadcasting using Java technology (hereinafter referred to as “Java data broadcasting”), a receiver receives and executes a byte code that is a program written by Java sent from a broadcasting station. At this time, not only a Java program executed by a Java virtual machine in the receiver but also a native code that is a processing code unique to the receiver may be called from Java.

  The native code that is expected to be used is installed in the receiver at the time of shipment. However, if a new Java data broadcast program is sent over the air, the existing native code is not sufficient, and additional native code May be required. In this case, it is necessary to acquire a native code that is missing in the receiver.

  In Java data broadcasting, Java programs, that is, byte codes, are common to receivers, but native codes differ from manufacturer to manufacturer and even from model to model. Things are needed.

  Therefore, there is a need for a method that efficiently distributes native code that compensates for deficiencies and obtains the receiver.

  As a means for distribution, a method using radio waves, a method using a network communication network, and the like are assumed. Conventionally, there are devices that upgrade receiver software for each model and devices that provide update information such as bug fixes (see, for example, Patent Document 1). The broadcasting station broadcasts notification information that informs when and on which channel software update data for the model is to be broadcast, and the corresponding receiver makes an update data reception reservation according to the notification information and downloads all of the corresponding update information. (See, for example, Patent Document 2). Furthermore, various standards for executing the above-described technique have been developed (see, for example, Non-Patent Documents 1 to 7).

JP 2008-236031 A Japanese Patent Laid-Open No. 2003-223387

Japan Radio Industry Association, “Java data broadcasting (AIT part of application-linked native code, Xlet asynchronous activation, subtitle character code conversion)”, ARIB STD-B23 (Japan Radio Industry Association, ARIB STD-B23 1.1 version, ("Application execution environment in digital broadcasting", February 5, 2004) “Data Carousel (Broadcast Download)” ISO / IEC 13818-6: 1998, “Information technology—Generic coding of moving pictures and associated audio information—Part 6: Extensions: CC Japan Radio Industry Association, “Engineering Download (Download Native Code)”, ARIB STD-B21 (Japan Radio Industry Association, ARIB STD-B21 4.6 Edition, “Receiver for Digital Broadcasting (Preferred Specifications)”, 2007 March 14, "Application-linked native code, Xlet asynchronous activation, layout method", J2SE API specification (Java 2 Platform API Specification, http://java.sun.com/j2se/1.5.0/docs/api/index.html ) "JNI specification (application-linked native code)", JNI specification (Java Native Interface 6.0 Specification, http://java.sun.com/javase/6/docs/technotes/guides/guides/juni/spec/jni/spec/jni/sp/ "Java language specification (generally related to Xlet)", Java language specification (The Java Language Specification, Third Edition, http://java.sun.com/docs/books/jlks/jlit/ml3th/ml3/thls/jlit/ml3/thls/thr_ml/thl_t3/thl_t3/jlit/ml3/thls/thr_jtit/ml3/thls_jrit/thl "Java Virtual Machine Specification (Xlet related general)", Java Virtual Machine Specification (The Java Virtual Machine Specification, Second Edition)

  However, although the version of the entire software is notified, there is no means for individually informing the contents of the software, and there is only an option of acquiring the updated software for the corresponding model or not at all. If you always want to keep all of the native code up-to-date, you can take out the relevant part of the announcement information just by using the model information as usual, and make a reservation and download it. Updating to the above is not efficient because it unnecessarily consumes resources such as reception capability and transmission path.

  On the other hand, it is conceivable to download a necessary native code from a server on a network communication network instead of downloading by broadcast waves. However, if there is no means for giving in detail a URL indicating where the native code necessary for a Java application can be obtained from using broadcast waves, there is no way to manage update information in units of native code. Since native codes differ from model to model, it is not practical to notify the information about native codes in detail at any time using broadcast waves.

  In addition, with the advancement of broadcasting technology in the future, it is assumed that indispensable programs other than the native code are generated in order to execute applications in data broadcasting. It is hoped that programs necessary for executing such applications in data broadcasting will be acquired or updated in a necessary and sufficient range in a timely manner and with minimum required resources such as reception capability and transmission path. .

  The present invention has been made in view of the above-described problems, and selects and acquires only programs that have not been acquired yet in a timely manner among the programs that are essential for applications used by a receiver in data broadcasting. An object of the present invention is to provide a program acquisition apparatus capable of performing the above and a program acquisition program.

  Furthermore, the present invention is a program update apparatus that can select and update only a program that needs to be corrected out of already acquired programs that is essential for an application used by a receiver in data broadcasting. The purpose is to provide.

  According to the first aspect of the present invention, a receiving unit that receives information from a broadcasting station, a program holding unit that holds an acquired program, and an application included in a data broadcast from information received through the receiving unit. A required list acquisition unit that acquires a list of essential programs that are indispensable programs for execution, a list of required programs acquired by the required list acquisition unit and an acquired program included in the program holding unit are collated, A deficient program determination unit that determines a deficient essential program, and a program acquisition unit that acquires a deficient essential program determined by the deficient program determination unit via the reception unit, Program that obtains essential programs required to execute applications included in data broadcasting To provide an acquisition device.

  With this configuration, the program acquisition device of the present invention includes a receiving unit that receives information from a broadcasting station, a program holding unit that holds an acquired program, and an application included in data broadcasting from information received through the receiving unit. Required list acquisition unit that acquires a list of essential programs that are indispensable programs for execution, and the list of required programs acquired by the required list acquisition unit against the acquired programs included in the program holding unit are insufficient A receiver for data broadcasting because it includes a deficient program determination unit that determines a required essential program, and a program acquisition unit that acquires a deficient essential program determined by the deficient program determination unit via the reception unit. Of the programs that are required for applications used by Only had programmed to identify, it can be obtained by selecting in a timely manner.

  Furthermore, the program acquisition apparatus of the present invention includes a notification information acquisition unit that acquires notification information for notifying provision of a program from the reception unit, and the program acquisition unit refers to the notification information, and the lack program The shortage program determined by the determination unit may be acquired by the reception unit.

  With this configuration, the program acquisition device of the present invention is configured such that the notification information acquisition unit that acquires the notification information that notifies the provision of the program from the reception unit, and the program acquisition unit refers to the notification information, and the insufficient program determination unit Since the determined deficient program can be acquired by the receiving unit, only the programs that have not yet been acquired among the programs that are essential for the application used by the receiver in data broadcasting can be selected and acquired in a timely manner.

  Further, in the program acquisition device of the present invention, the program holding unit further holds an address in a network communication network of a server that provides a program corresponding to the model of the own device, and the program acquisition unit is stored in the program holding unit. The deficient program determined by the deficient program determination unit according to the held address may be acquired from the server via the network communication network by the receiving unit.

  With this configuration, in the program acquisition device of the present invention, the program holding unit further holds an address in the network communication network of the server that provides a program corresponding to the model of the own device, and the program acquisition unit holds the program holding unit. Of the programs that are indispensable for the application used by the receiver in data broadcasting, since the missing program determined by the missing program determination unit can be acquired from the server via the network communication network by the receiving unit according to the address Only programs that have not yet been acquired can be selected and acquired in a timely manner via the network communication network. The essential list acquisition unit may acquire a list of essential programs based on the model of the own device. Furthermore, in the program acquisition device of the present invention, the essential program may be a native code for executing Java data broadcasting. In this specification, a Java data broadcast will be described as an example of a data broadcasting service, and a program file will be described as, for example, a native code required for executing the Java data broadcasting service. The present invention is not limited to this, and any program that is indispensable for executing the data broadcasting service can be applied.

  Furthermore, in the program acquisition device of the present invention, the list of essential programs may be included in an AIT (Application Information Table) broadcast via a data broadcast wave.

  Information to be transmitted to the receiver generally follows the carousel transmission system. As will be described in detail later, the AIT realizes quick and reliable data transmission. With this configuration, the program file acquisition apparatus of the present invention can quickly obtain information related to an essential program by AIT, and therefore can obtain information on a desired program list more quickly and reliably.

  According to the second aspect of the present invention, a receiving unit that receives information from a broadcasting station, a program holding unit that holds an acquired program, and an application included in data broadcasting from information received through the receiving unit. A required list acquisition unit that acquires a list of essential programs that are indispensable programs for execution, a list of required programs acquired by the required list acquisition unit and an acquired program included in the program holding unit are collated, A deficient program determination unit for determining a deficient essential program; and a program acquisition unit for acquiring a deficient essential program determined by the deficient program determination unit via the reception unit, the deficiency The required program is updated with a part of the acquired program held in the program holding unit Characterized in that it comprises a program that provides a program acquisition unit that acquires a required program necessary for executing the applications included in the data broadcasting.

  With this configuration, the program acquisition apparatus of the present invention is included in data broadcasting from a receiving unit that receives information from a broadcasting station, a program holding unit that holds an acquired program, and information that is received via the receiving unit. The required list acquisition unit that acquires a list of essential programs that are programs essential to the execution of the application, the list of required programs acquired by the required list acquisition unit, and the acquired programs included in the program holding unit are collated. Determining a deficient essential program, a deficient program determination unit, and a program acquisition unit for acquiring a deficient essential program determined by the deficient program determination unit via the receiving unit, An indispensable program that is missing is an already acquired program held in the program holding unit. Since it includes a program that updates a part of the program, only the programs that have already been acquired that are essential for the application used by the receiver in data broadcasting and that need to be corrected are selected and updated in a timely manner. be able to.

  Furthermore, in the program update device of the present invention, the deficient essential program may include an update program and a forced fetch flag. The flag can be provided with about 1 bit. With this configuration, the program update device of the present invention can forcibly update only the program that needs to be corrected by the update program attached to the lacking essential program and the forced fetch flag.

  According to a third aspect of the present invention, there is provided a program update system comprising a broadcast station that broadcasts data broadcast program information and a program acquisition device, wherein the program update system receives the broadcast program information from the broadcast station. An indispensable program for executing the application included in the data broadcast program information from the broadcast program information received via the reception unit. The required list acquisition unit that acquires the list of required programs that is, the required program list acquired by the required list acquisition unit, and the acquired program included in the program holding unit are collated, and the required essential is missing Judged by a deficient program judging unit and the deficient program judging unit A program update system for acquiring an essential program necessary for executing an application included in the data broadcast program information, including a program acquisition unit for acquiring an additional essential program via the receiving unit. May be.

  With this configuration, the program acquisition system of the present invention is a program update system including a broadcast station that broadcasts data broadcast program information and a program acquisition device, and the program update system receives the broadcast program information from the broadcast station. Indispensable for executing the application included in the data broadcast program information from the broadcast program information received via the reception unit, the reception unit that receives the received program, the program holding unit that holds the acquired program The required list acquisition unit that acquires a list of required programs that are strict programs, the list of required programs acquired by the required list acquisition unit, and the acquired programs included in the program holding unit A deficient program determining unit for determining a required program, and the deficient program Including a program acquisition unit that acquires an indispensable essential program determined by the determination unit via the reception unit, and has not yet acquired among the programs that are essential for the application used by the receiver in data broadcasting Only programs can be identified and selected and acquired in a timely manner.

  According to a fourth aspect of the present invention, there is provided a program acquisition program for causing a computer to execute processing for acquiring an essential program necessary for executing an application included in data broadcasting, and receiving a step of receiving information from a broadcasting station; A program holding step for holding the acquired program, a mandatory list obtaining step for obtaining a list of essential programs that are programs essential to the execution of the application included in the data broadcast from the information received through the receiving step; A deficient program determination step for comparing a list of required programs acquired in the required list acquisition step with an acquired program included in the program holding step to determine a deficient essential program, and the deficient program determination step Judged in A program acquisition step of acquiring a required program by adding through said receiving step, characterized in that it comprises a provides a program acquisition program to get the necessary programs required to run the application included in the data broadcasting.

  With this configuration, the program acquisition program of the present invention is included in the data broadcast from the reception step of receiving information from the broadcasting station, the program holding step of holding the acquired program, and the information received through the reception step. The essential list acquisition step for acquiring a list of essential programs that are programs essential to the execution of the application, and the list of essential programs acquired in the essential list acquisition step are compared with the acquired programs included in the program holding step. And executing a computer to execute an insufficient program determination step for determining an indispensable essential program and a program acquisition step for acquiring the indispensable essential program determined in the inadequate program determination step through the reception step. Make Bets for can, to a computer, of the program the receiver is essential to the application for use in data broadcasting, to identify the program that has not yet been acquired, can be acquired by selecting a timely manner.

  According to the present invention, a program essential for a receiver to execute an application in data broadcasting can be obtained within a necessary and sufficient range in a timely manner and with minimum required resources such as reception function and transmission path. Can do. Therefore, according to the present invention, it is possible to provide a data broadcasting service using a new function at any time while minimizing the load on both the receiver side and the transmission path.

  Further, according to the present invention, it is possible to select and update only the programs that need to be corrected among the already acquired programs that are essential for applications used by the receiver in data broadcasting.

It is a figure which shows the software structure of the typical receiver which receives data broadcasting using the program acquisition apparatus of this invention. It is a block diagram of the native code acquisition apparatus of the 1st Embodiment of this invention. 3 is a flowchart for explaining the operation of the native code acquisition device of FIG. 1. It is a block diagram of the native code acquisition apparatus of the 2nd Embodiment of this invention. 6 is a flowchart for explaining the operation of the native code acquisition device of FIG. 4. It is a figure which shows an example of the program which acquires an essential native code according to this invention. It is a figure which shows the principle of the native code update apparatus of the 3rd Embodiment of this invention.

  First, before describing the details of the embodiment of the present invention, the configuration of a typical receiver using the program acquisition apparatus according to the present invention will be described.

  FIG. 1 shows an example of the software configuration of a typical receiver that receives a data broadcast using the program acquisition apparatus according to the present invention. In order to facilitate understanding, in the following description, the receiver is necessary and sufficient to receive a data broadcast in accordance with the standards described in Non-Patent Documents 3 to 9 including the ARIB STD-B23 standard. A program that needs to be acquired using timely and minimal resources within a certain range will be described as native code.

  As shown in FIG. 1, a typical receiver 1 includes a Java data application A1, a Java class library A2, a Java virtual machine A3, a native code A4, a driver A5, an OSA6, and hardware A7. It is configured. Although not limited to this, for example, an Xlet application may be used as the Java data application A1.

  The Java class library A2 includes an application management unit that collects programs related to application management, a transport stream (hereinafter referred to as “TS”) acquisition, a TS acquisition that collects programs related to transfer control, a transfer control unit, and an image / audio. AV (Audio Visual) playback control unit, which collects programs related to playback control of files, or DSM- which collects programs related to control of access to files and streams in the ISO / IEC 13818-6 digital interactive service, JMF (Java Media Framework) unit, ISO / IEC 13818-6 CC (Digital Storage Media-Command and Control) control unit, other MHP (Multimedia Home Platform) ) MHP library of related programs, extension libraries, for example, includes a PBP (Personal Basis Profile) Java library of programs on such 0.1.

  The native code A4 includes a DTV (Digital Television) middleware, a system management unit, a system common library, an I / O (input / output) control unit, and a graphics control unit. For example, Linux may be used as the OSA 6 on which the hardware A7 operates. The Java class library A2 and the native code A4 are linked by a Java Naive Interface (JNI). The native code A4 absorbs the operating environment that is different for each receiver and operates the Java virtual machine. Hereinafter, a case where the native code is acquired using a timely and minimum resource within a necessary and sufficient range will be described in detail using an embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
The program acquisition apparatus according to the first embodiment of the present invention will be described below. In order to facilitate understanding, in the following description of the embodiment, a case will be described in which the acquired program is a native code and the program acquisition device is implemented as a native code acquisition device.

  FIG. 2 is a block diagram illustrating a basic configuration example of the native code acquisition device that configures the program acquisition device according to the first embodiment of this invention. As shown in FIG. 2, the native code acquisition device 10 constituting the program acquisition device of the present embodiment has a data broadcast receiving unit 11 that receives a data broadcast from a broadcast wave, an acquired native code, and Described in a predetermined part of the data broadcast received by the data broadcast receiving unit 11 and the native code holding unit 12 having a native code holding list relating to the currently acquired native code, the required native code acquiring unit 13 for acquiring the native code A required native code list acquisition unit 14 for acquiring a list of native codes essential for executing the Java application included in the data broadcasting and a position when each native code file is expanded in the native code holding unit 12 And the required native code squirrel A list of essential native codes obtained from the acquisition unit 14 and a native code holding list currently stored in the receiver obtained by referring to the native code holding unit 12 are collated to identify a missing native code. A deficient native code determination unit 15.

  More specifically, the broadcasting station describes a list of native codes necessary for the Java application in application-related information, specifically, AIT, which is sent prior to transmission of the Java application. The essential native code list acquisition unit 14 acquires an essential native code list from the AIT included in the data broadcast received by the data broadcast reception unit 11. The deficient native code determination unit 15 compares the list acquired by the essential native code list acquisition unit 14 with the list of native codes currently stored in the receiver obtained from the native code storage unit 12 to determine whether the Java application The native code that is missing to run is now identified.

  Furthermore, the native code acquisition apparatus 10 of the present embodiment includes a model code holding unit 16 that holds model information of the receiver, for example, information such as a manufacturer name and model name, and a notification output from the data broadcast receiving unit 11. From the broadcast information and the model information of the receiver provided from the model code holding unit 16, a notification information acquisition unit 17 that acquires download notification information related to the receiver and a download notification information obtained from the notification information acquisition unit 17 The broadcast native code list acquisition unit 18 that acquires a broadcast native code list related to the download of the native code described in the section, the lack native code list obtained from the lack native code determination unit 15, and the notification information acquisition unit 17 Download notification information or broadcast native code list From the broadcasting native code list obtained from the acquisition unit 18 acquires information related to broadcast native code acquisition is required is downloaded, having a receiving reservation control unit 19 for receiving reservation control of the broadcast, the.

  Specifically, the broadcasting station notifies when and how the upgrade native code for each receiver is downloaded in the software distribution notification information, specifically, SDTT (Software Download Trigger Table). The notification information acquisition unit 17 acquires the SDTT, the broadcast native code list acquisition unit 18 extracts the download information of the native code from the SDTT, and the reception reservation control unit 19 receives the insufficient native code obtained from the insufficient native code determination unit 15. Broadcast reception reservation control is performed from the list and the download information of the native code extracted by the broadcast native code list acquisition unit 18.

  At the timing reserved by the reception reservation control performed by the reception reservation control unit 19, the data broadcast reception unit 11 and the essential native code acquisition unit 13 perform operations necessary for acquiring a desired native code, and the native code is obtained from the broadcast wave. The acquired native code is stored in a predetermined development position in the native code holding unit 12. Along with this, the native code holding list in the native code holding unit 12 is updated.

  Furthermore, the native code acquisition apparatus 10 according to the present embodiment includes a data broadcast processing unit 20 that performs processing of a Java application using the native code in the native code holding unit 12 and presents a desired data broadcast.

  FIG. 3 is a flowchart for explaining the operation of the native code acquisition apparatus 10. With reference to FIG. 2, the operation of the native code acquisition apparatus 10 configured as described above will be described. The following processing is executed by CPU control (not shown) included in the native code acquisition device 10.

  First, in step S101, a data broadcast is received. Specifically, the data broadcast receiving unit 11 receives a data broadcast from a broadcast wave. In step S102, a list of necessary native codes is acquired. Specifically, the essential native code list acquisition unit 14 is a native application necessary for executing an application described in a predetermined part of the data broadcast for a Java application included in the data broadcast received by the data broadcast reception unit 11. The code list and the position when each native code file is expanded by the native code holding unit 12 are acquired.

  In step S103, a list of necessary native codes is referenced to identify missing native codes. Specifically, the deficient native code determination unit 15 holds the list of essential native codes obtained from the essential native code list acquisition unit 14 and the current receiver obtained by referring to the native code holding unit 12. Check the native code holding list to identify missing native code. In step S104, the corresponding native code download information is acquired from the native code notification information and the model information. Specifically, the broadcast native code list acquisition unit 18 receives the notification broadcast information output from the data broadcast reception unit 11 acquired by the notification information acquisition unit 17 and the model information of the receiver provided from the model code holding unit 16. Download notification information related to the receiver. Further, the broadcast native code list acquisition unit 18 acquires a broadcast native code list related to downloading of the native code described in a predetermined location from the acquired download notification information.

  In step S105, the reception reservation control unit 19 is obtained from the deficient native code list obtained from the deficient native code determination unit 15 and the download notice information obtained from the notice information obtaining part 17 or the broadcast native code list obtaining part 18. Information related to the broadcast in which the native code that needs to be downloaded is acquired from the broadcast native code list, and reception reservation control of the broadcast is performed.

  At the timing reserved by the reception reservation control performed by the reception reservation control unit 19, the data broadcast reception unit 11 and the essential native code acquisition unit 13 perform operations necessary for acquiring a desired native code, and the native code is obtained from the broadcast wave. The acquired native code is stored in a predetermined development position in the native code holding unit 12. Along with this, the native code holding list in the native code holding unit 12 is updated.

  As described above, the native code acquisition device 10 according to the present embodiment can identify the missing native code, reserve only the missing native code, and acquire it from the broadcast wave. Not only can the code be acquired in a timely manner, but also the required resources such as reception capability and transmission path can be minimized.

  In the above-described embodiment, the case where the native code is acquired from the broadcast wave has been described, but the present invention is not limited to this. The native code may be acquired via a network, for example. When the receiver is connected to the network communication network, the necessary native code may be obtained via the network communication network instead of the download reservation. A method for acquiring the native code via the network will be described in the next embodiment.

(Second Embodiment)
FIG. 4 is a block diagram illustrating a basic configuration example of the native code acquisition device that configures the program acquisition device according to the second embodiment of the present invention.

  As shown in FIG. 4, the native code acquisition device 30 according to the second embodiment of the present invention is connected to the native code acquisition device 10 according to the first embodiment described in FIG. Instead of the required native code acquisition unit 13 for acquiring the required native code, the required native code acquisition unit 21 for acquiring the required native code from the native code server 22 existing outside the receiver via the network communication network is provided. The prepared point is different. The same reference numerals are given to the configurations substantially the same as those of the above-described embodiment, and the detailed description is omitted.

  In the present embodiment, when the data broadcast receiving unit 11 receives a data broadcast from a broadcast wave, the essential native code list acquisition unit 14 performs data broadcast on the Java application included in the data broadcast received by the data broadcast receiving unit 11. The list of native codes necessary for executing the application described in the predetermined place and the position when each native code file is expanded in the native code holding unit 12 are acquired.

  The deficient native code determination unit 15 compares the list supplied from the essential native code list acquisition unit 14 with the list of native codes currently held in the receiver provided from the native code holding unit 12, and is missing. Identify native code.

  The essential native code acquisition unit 21 specifies the position on the network communication network of the native code server 22 that can acquire the native code from information such as model information given at the time of shipment from the factory, for example, via the network communication network. Thus, the missing native code identified by the missing native code determination unit 15 is acquired.

  The native code acquired by the essential native code acquisition unit 21 is stored at a predetermined development position in the native code holding unit 12, and the native code holding list in the native code holding unit 12 is updated.

  FIG. 5 is a flowchart for explaining the operation of the native code acquisition device 30. With reference to FIG. 5, the operation of the native code acquisition device 30 configured as described above will be described. The following processing is executed by CPU control (not shown) included in the native code acquisition device 30.

  Since the processing from step S101 to step S103 is substantially the same as that of the native code acquisition apparatus 10 of the first embodiment, description thereof is omitted.

  In step S204, the server of the corresponding native code is specified from the model information. Specifically, the position on the network communication network of the native code server 22 that can acquire the native code is specified from information given at the time of factory shipment.

  In step S205, the missing native code is acquired from the identified server. Specifically, the essential native code acquisition unit 21 acquires the missing native code identified by the missing native code determination unit 15 from the native code server 22 via the network communication network.

  In the present embodiment, the position on the network communication network of the native code server 22 from which the native code can be obtained has been given at the time of factory shipment. However, the present invention is not limited to this. For example, the position of the native code server 22 on the network communication network may be acquired from the AIT obtained from the data broadcast receiving unit 11 and the model information provided from the model code holding unit 16, or only the network communication network. Instead, it may be acquired or updated later by another means such as broadcasting.

The position of the native code server 22 on the network communication network may be described from the manufacturer name and model name as follows, for example.
ftp.makerXXX.co.jp/modelYYY/

  Next, FIG. 6 shows an example of a description of a program for obtaining the essential native code according to the present invention.

  In the example of the essential native code shown in FIG. 6, it is described in AIT, but it can also be described in arib_j_info in the PMT.

  As the description of the download native code in the notification information, for example, the native code file name may be written in module_info_byte in Download_content_descriptor () in the SDTT of ARIB STD-B21. Separately, it is also possible to add a new field in the SDTT and describe the native code file name.

  As described above, the native code acquisition device 30 according to the present embodiment can identify the missing native code and acquire only the missing native code from the network communication network. In addition to acquisition, it is possible to minimize the required resources such as reception capability and transmission path.

  Further, although the native code acquisition device 30 of the present embodiment has been described with respect to the configuration in which the missing native code is identified and only the missing native code is acquired from the network communication network, the present invention is not limited thereto. Not. In combination with the first embodiment, the missing native code may be acquired by selectively using two paths of the broadcast wave and the network communication network. Specifically, in consideration of the size, usage, and urgency of the missing native code, it may be acquired using a route that is determined to be optimal from the broadcast wave and the network communication network.

  In the above-described embodiment, the description has been given of the case where the missing essential native code is acquired from the broadcast wave or the network communication network, but the present invention is not limited to this. For example, when it is necessary to correct some native codes among the native codes already held in the native code holding unit 12, only the native codes are corrected via a broadcast wave or a network communication network. It may be. A method for correcting the native code via a broadcast wave or a network will be described in the following embodiment.

(Third embodiment)
The program update apparatus according to the third embodiment of the present invention will be described below. In order to facilitate understanding, in the following description of the embodiment, a case will be described in which the program to be updated is a native code and the program update device is implemented as a native code update device. The native code update device constituting the program update device of the present embodiment is insufficient with the native code acquisition device 10 of the first embodiment or the native code acquisition device 30 of the second embodiment. The configuration and operation for acquiring the native code are almost the same.

  Specifically, the native code update device according to the present embodiment has a configuration in which one or both of the above-described native code acquisition devices 10 and 30 are combined, and the missing native code is broadcasted to the broadcast wave. In consideration of the size, application, and urgency of the native code, the path that is determined to be optimal from the broadcast wave and the network communication network will be acquired. ing. Hereinafter, differences from the above-described embodiment will be described in detail.

  FIG. 7 is a diagram illustrating the principle of the native code update device according to the third embodiment of this invention.

  Consider a case where it is necessary to modify some native code already held in the native code holding unit 12. Specifically, as shown in FIG. 7, the native code holding unit 12 includes, for example, a native code a. SO and native code b. SO is retained and native code b. Assume that the SO is corrected.

  The broadcast station side uses the native code c. Create SO. Native code c. Since the SO is an essential native code that does not exist in the native code holding unit 12, the SO is acquired through either a broadcast wave or a network communication network in accordance with the above-described method, and a predetermined code in the native code holding unit 12 is obtained. It is stored in the unfolded position.

  This native code c. Native code b '. SO with native code c. Processed as a unit with SO and incorporated so as to be obtained, and native code c. When the SO is expanded in the native code holding unit 12, the native code b. SO is forced to the native code b '. Update with SO. This is the native code c. If a forced fetch flag is provided in the SO and the flag is on, the native code b. SO forcibly attached native code b '. It should be updated with SO.

  As described above, in the native code update device according to the present embodiment, even if it is necessary to modify the already acquired native code, only the native code that needs to be modified can be selected and updated in a timely manner. it can.

  Further, in the present embodiment, a configuration has been described in which a native code that has already been acquired is updated with a native code that is attached so as to be acquired as a unit with a new essential native code, but the present invention is not limited to this. . For example, let the new required native code be attached so that the updated native code and dependency list are acquired as a unit, and rewrite all the native code written in the dependency list with the attached native code. May be.

  As described above, the program acquisition device and the program update device of the present invention have been described using the native code acquisition device and the native code update of various embodiments. The program acquisition device and the program update device of the present invention are not limited to acquisition or update of native code for executing a Java data broadcast service, but a program other than the native code essential for executing the data broadcast service. The present invention can be applied to various uses such as acquisition, update, and acquisition and update of moving images and still images. The program acquisition device or program update device of the present invention can be operated by a program acquisition program or program update program that causes a general computer including the CPU and memory to function as the above-described means. The program acquisition program or the program update program can be distributed through a communication line, or can be written on a recording medium such as a CD-ROM for distribution. Furthermore, the present invention may be configured as a program acquisition system or a program update system including a broadcast station and a program acquisition device or a program update device.

10, 30 Native code acquisition device (program acquisition device)
11 Data broadcasting receiver (receiver)
12 Native code storage (program storage)
13, 21 Essential native code acquisition unit (program acquisition unit)
14 Required native code list acquisition unit (required list acquisition unit)
15 Mandatory native code determination unit (insufficient program determination unit)
16 Model Code Holding Unit 17 Notification Information Acquisition Unit 18 Broadcast Native Code List Acquisition Unit (Notification Information Acquisition Unit)
19 Reception reservation control unit 20 Data broadcast processing unit 22 Native code server

Claims (9)

A receiver for receiving information from the broadcast station;
A program holding unit for holding the acquired program;
An essential list acquisition unit that acquires a list of essential programs that are programs indispensable for execution of applications included in data broadcasting from information received through the reception unit;
A deficient program determination unit that compares a list of required programs acquired by the required list acquisition unit with an acquired program included in the program holding unit to determine a deficient essential program;
A program acquisition unit that acquires, via the reception unit, an indispensable essential program determined by the insufficiency program determination unit, and acquires an essential program necessary for executing an application included in the data broadcast Program acquisition device. Further, from the receiving unit, comprising a notification information acquisition unit for acquiring notification information to notify the provision of the program,
The program acquisition apparatus according to claim 1, wherein the program acquisition unit acquires the deficient program determined by the deficient program determination unit with reference to the notification information, using the reception unit. In addition, a network communication unit that transmits and receives information to and from a predetermined server via a network communication network,
The program acquisition device according to claim 1, wherein the program acquisition unit acquires the insufficient program determined by the insufficient program determination unit from the predetermined server via the network communication network by the network communication unit. .   The program acquisition apparatus according to claim 1, wherein the essential list acquisition unit acquires a list of essential programs based on a model of the own device.   2. The program acquisition apparatus according to claim 1, wherein the essential program is a native code for executing Java data broadcasting.   2. The program acquisition apparatus according to claim 1, wherein the list of essential programs is included in an AIT (Application Information Table) broadcast via a data broadcast wave. A receiver for receiving information from the broadcast station;
A program holding unit for holding the acquired program;
An essential list acquisition unit that acquires a list of essential programs that are indispensable programs for executing an application included in data broadcasting from information received through the reception unit;
A deficient program determination unit that compares a list of required programs acquired by the required list acquisition unit with an acquired program included in the program holding unit to determine a deficient essential program;
A program acquisition unit that acquires the indispensable essential program determined by the insufficient program determination unit via the reception unit;
The missing essential program includes a program for updating a part of the acquired program held in the program holding unit,
A program updating apparatus for updating an essential program necessary for executing an application included in data broadcasting.   7. The program update apparatus according to claim 6, wherein the deficient essential program has an update program and a forced fetch flag. A program acquisition program for causing a computer to execute processing for acquiring an essential program necessary for executing an application included in data broadcasting,
A receiving step for receiving information from the broadcast station;
A program holding step for holding the acquired program;
An essential list acquisition step of acquiring a list of essential programs that are indispensable programs for executing an application included in data broadcasting from the information received through the reception step;
A deficient program determination step of determining a deficient essential program by comparing a list of essential programs acquired in the essential list acquisition step with an acquired program included in the program holding step;
Including a program acquisition step of acquiring, through the reception step, a deficient essential program determined in the deficient program determination step,
A program acquisition program for acquiring an essential program necessary for executing an application included in data broadcasting.

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