JP5215255B2 - Program execution device, program execution method, content reproduction device, program, and recording medium - Google Patents

Description

  The present invention relates to a first recording medium and a program execution device that executes a program contained in a program file read from a second recording medium that has a higher access speed than the first recording medium. In particular, the present invention relates to a program execution device that executes a Java (registered trademark) program read from an optical disk or a flash memory.

  Along with the spread of television receivers capable of high-definition display such as so-called full high-definition, recorder devices capable of mounting Blu-ray discs (BD) capable of recording large-capacity data such as full high-definition programs are also widespread. doing.

  As a BD, there is a disc in which an interactive function such as a Blu-ray disc Java (hereinafter referred to as BD-J) is incorporated in addition to a normal disc. In BD-J, since a Java application is executed during playback of a disc, it is necessary to read a BD-J module file in which a Java program is stored from the disc.

  An example of a file structure in a BD employing BD-J is shown in FIG. As shown in FIG. 11, a BD adopting BD-J has two object files (module files) of a movie object and a BD-J object. Each object file is associated with a title name in the index table. That is, for example, when the top menu title is selected, the disc playback device plays back the content recorded as the movie object 2. For example, when title 1 is selected, the disc playback apparatus plays back a Java application that operates according to a Java program file recorded as a BD-J object 1.

  As described above, in BD-J, various expressions can be made by a Java application operating by a Java program. However, since it takes time to read out the BD-J object, the user waits until the content (Java application) is actually played after instructing the content to be played. Recently, BDs that play elaborate content (Java applications) are increasing, and the time required to read out BD-J objects is becoming even longer.

  Patent Document 1 discloses a technique for shortening the time required for loading a Java program by storing runtime data loaded with a class file of the Java program in an image-type memory.

  Patent Document 2 discloses a technique for recording a program read from a disk and executing the program only when the program stored in the memory and the version of the program read from the disk do not match. Yes.

JP 2004-240965 A (publication date: August 26, 2004) JP-A-4-241030 (Publication date: August 28, 1992)

  However, in the technique disclosed in Patent Document 1, runtime data obtained by decompressing a compressed file is an image type file, and all runtime data necessary for executing a Java program is recorded. Therefore, there is a problem that the memory capacity for storing data increases.

  In addition, the comparison of the version number of the Java program needs to be performed after the compressed file storing the Java program is read and expanded. That is, when the disk is taken out from the disk drive, it is necessary to read the compressed file from the disk again. For this reason, even if the technique disclosed in Patent Document 2 is used, there is a problem that the time required to reproduce the Java application is limited to when the disk is not removed from the disk drive. In particular, in an optical disk drive, various contents can be reproduced by replacing an optical disk as a recording medium, and this problem becomes a serious problem.

  The present invention has been made in view of the above-described problems, and its main purpose is to suppress an increase in the recording capacity of a memory for recording the read program file and to execute a program to be executed. An object of the present invention is to provide a program execution device that shortens the time required to execute the program.

In order to solve the above problems, a program execution device according to the present invention provides:
A program execution device for executing a program recorded on a first recording medium or a second recording medium accessible at a higher speed than the first recording medium,
Among the program files recorded on the first recording medium, a program file satisfying a predetermined condition among program files including one or more programs is set as a recording target program file, and the recording target program file is If not recorded on the second recording medium, recording means for recording the recording target program file on the second recording medium;
Execution means for executing a program recorded on the first recording medium, and if the program file including the program is recorded on the second recording medium, the program file is recorded on the second recording medium. Execution means for reading from the medium and executing the program;
It is characterized by having.

  A program execution device according to the present invention is a program file recorded on a first recording medium, and is a program file (recording target program file) that satisfies a predetermined condition among program files including one or more programs. ) Is not recorded on the second recording medium, the recording target program file is recorded on the second recording medium.

  Further, the program execution device according to the present invention can execute the program recorded on the first recording medium if the program file including the program to be executed is recorded on the second recording medium. Is read from the second recording medium and executed. Note that the second recording medium is a recording medium having a higher access speed than the first recording medium.

  Thus, in the program execution device according to the present invention, if the program file including the program to be executed is recorded on the second recording medium, the program can be performed more quickly than the case where the program file is recorded on the first recording medium. Files can be read. That is, it is possible to reduce the time required to execute the program to be executed.

  Further, in the program execution device according to the present invention, the second recording medium is recorded by recording only the program file satisfying the predetermined condition on the second recording medium, as compared with the case where all the program files are recorded. The recording capacity required for the recording medium can be reduced.

  That is, in the program execution device according to the present invention, it is possible to reduce the time required to execute the program to be executed while suppressing the increase in the recording capacity necessary for the second recording medium. Play.

  Note that the program file in this specification and the like is a program file that is processed after all data constituting the file is read.

In the program execution device according to the present invention, further, for each of the program files recorded on the first recording medium, whether the time required for executing the program included in the program file is equal to or greater than a predetermined threshold value A first determination means for determining whether or not,
Preferably, the recording unit records the program file determined by the first determination unit as the required time being equal to or greater than a predetermined threshold as a recording target program file on the second recording medium.

  According to the above configuration, the recording means has a time required to execute the program included in the program file out of the program files recorded on the first recording medium by the first determination means is a predetermined threshold value or more. The program file determined to be present is recorded on the second recording medium.

  Here, the time required for executing the program is the largest due to the time required for reading the program file from the first recording medium.

  Therefore, it is possible to reduce the time required for reading the program file by recording the program file, which takes a long time to execute the program, on the second recording medium having a higher access speed than the first recording medium. As a result, the time required to execute the program can be shortened. Further, the recording capacity required for the second recording medium can be reduced as compared with the case where all program files are recorded.

  That is, in the program execution device according to the present invention, it is possible to further reduce the time required to execute the program to be executed while suppressing an increase in the recording capacity necessary for the second recording medium. There is an effect.

  In the program execution device according to the present invention, it is preferable that the first determination unit determines that a program file having a file size equal to or larger than a predetermined threshold is a program file whose required time is equal to or larger than the threshold.

  According to the above configuration, it is possible to eliminate the increase or decrease in the required time due to the quality of the first recording medium related to the reading of the program file and the processing other than the reading of the program file in the program execution apparatus.

  As a result, the program execution apparatus according to the present invention has an effect that the program file to be recorded on the second recording medium can be selected based on the required time resulting from the program file itself.

  In the program execution device according to the present invention, the end time of the first content that operates by executing the program included in the first program file, and the first read before the first program file are also provided. And a second determination unit that determines a start time of the second content that operates by executing a program included in the second program file, and the recording unit includes the first determination unit in the first determination unit. A program file for which the required time is determined to be greater than or equal to the threshold, and the second determination means determines that the start time of the second content is later than the end time of the first content It is preferable to record the file on the second recording medium.

  According to the above configuration, the first determination unit determines that the time required for executing the program is equal to or greater than the threshold value, and the second determination unit determines the end time of the second content is the second. The first program file determined to be before the start time of the one content is recorded on the second recording medium. That is, in the program execution device according to the present invention, during the reproduction of the second content, the program file including the program for executing the first content to be reproduced is not recorded on the second recording medium. .

  This is because if the content starts to be played back during the playback of the previously operating content, there is no need to record it on the second recording medium because no waiting time is given to the user.

  Thereby, in the program execution device according to the present invention, the number of program files to be recorded on the second recording medium can be reduced as compared with the case where all the program files are recorded on the second recording medium. Therefore, the program execution device according to the present invention has the effect of further suppressing the increase in the recording capacity of the second recording medium while shortening the time required to reproduce the content.

  In the program execution device according to the present invention, among the program files recorded on the first recording medium, a program file having a predetermined reading order is used as the recording target program file. It is preferable to record in

  According to the above configuration, the recording unit records the program file whose reading order is a predetermined order on the second recording medium.

  As a result, the time required to execute the program included in the program file recorded on the second recording medium can be shortened. In addition, an increase in the recording capacity of the second recording medium can be suppressed as compared with the case where all program files are recorded on the second recording medium.

  That is, the program execution device according to the present invention has an effect of suppressing an increase in the recording capacity of the second recording medium while shortening the time required to execute the program.

  In the program execution device according to the present invention, the recording means further uses the program file read first among the program files recorded on the first recording medium as the recording target program file. It is preferable to record in

  According to the above configuration, the program file that is first read from the first recording medium is always recorded on the second recording medium.

  As described above, by recording the first read program file on the second recording medium, it is possible to reduce the time required to execute the program included in the first read program file. Play.

  This can be translated into an effect that can shorten the time from when the user instructs the reproduction of the content until the content is actually reproduced.

  In the case where the first recording medium is an optical disk and the second recording medium is a semiconductor memory, the time required to start reading a file from the optical disk (for example, the time required to stabilize the rotation of the optical disk, This is particularly effective because the seek time can be shortened.

  In the program execution device according to the present invention, the first determination means further has an actual measurement time required for executing the program included in the program file recorded on the first recording medium to be a predetermined threshold value or more. It is preferable to determine that the program file is a program file whose required time is equal to or greater than a threshold value.

  According to the above configuration, since the actual time required until the program file is executed is measured, it is possible to make a determination regarding the execution of the program file based on information more in line with the actual operation.

  As a result, the program execution device according to the present invention has an effect that the program file to be recorded on the second recording medium can be selected based on the required time according to the actual reading operation.

  This configuration is particularly suitable when the increase or decrease in the required time due to the quality of the first recording medium related to the reading of the program file and the processing other than the reading of the program file executed in the program execution device is small. is there.

  A program execution device according to the present invention reads a program file from the first recording medium using any one of a plurality of reading units, and the first determination means stores the first recording medium on the first recording medium. For each recorded program file, whether or not the time required for executing the program included in the program file is equal to or greater than a predetermined threshold indicates whether or not the reading unit used for reading the program file reads It is preferable to determine based on the above.

  According to the above configuration, when the file reading speed and the reading amount in the reading unit loaded with the first recording medium are equal to or smaller than the predetermined threshold, the required time for the program file read from the reading unit is equal to or larger than the threshold. Judged as a program file.

  That is, in the program execution device according to the present invention, based on the hardware performance of the reading unit, it is determined whether or not the time required to execute the program is equal to or greater than a threshold value.

  As a result, the program execution device according to the present invention has an effect that the program file to be recorded on the second recording medium can be selected based on the hardware performance necessary for the execution of the program.

  Note that the file reading speed and the file reading amount in the reading unit are caused by the amount of cache memory in the reading unit, the type of transmission medium between the reading unit and the program execution device, and the like. When the first recording medium is an optical disk, the rotation speed and laser intensity of the first recording medium in the reading unit are factors that determine the file reading speed.

  The program execution device according to the present invention further includes a plurality of the second recording media, and at least one of the plurality of second recording media has an access speed higher than that of the other second recording media. When the recording medium is low, the recording means records the first read program file on the second recording medium having a low access speed, and records another recording target program file on the other second recording medium. It is preferable to do.

  According to the above configuration, the program file read first from the first recording medium is recorded on the second recording medium having a low access speed, and the other recording target program file is recorded on the second recording medium having a high access speed. Record.

  As a result, an increase in the recording capacity of the second recording medium having a high access speed can be suppressed. Even in the second recording medium having a low access speed, since the access speed is higher than that in the first recording medium, the time required to execute the program included in the program file read out first is reduced. There is also an effect that can be shortened.

  In the program execution device according to the present invention, when the first recording medium satisfies a predetermined condition, the program file copied from the first recording medium is erased from the second recording medium. It is preferable that an erasing unit is further provided.

  According to the above configuration, a program file that satisfies a predetermined condition is deleted from the second recording medium.

  As a result, the second recording medium can be prevented from becoming full.

  In the program execution device according to the present invention, the erasing unit may further include a case where an elapsed time after executing the program included in the program file recorded on the first recording medium is a predetermined time or more. The program file copied from the first recording medium is preferably deleted from the second recording medium.

  According to the above configuration, when there is a program file including a program that has not been executed for a predetermined time or longer, the program file is deleted.

  As a result, it is possible to delete the program files that are considered to be less likely to be executed by the user in order.

  In the program execution device according to the present invention, the erasing unit further includes the first erasure unit when the number of executions of the program included in the program file recorded on the first recording medium is equal to or less than a predetermined number. It is preferable to erase the program file copied from the recording medium from the second recording medium.

  According to the above configuration, when there is a program file including a program that is executed only a predetermined number of times or less, the program file is deleted.

  As a result, it is possible to delete the program files that are considered to be less likely to be executed by the user in order.

  In the program execution device according to the present invention, the erasing means further includes the first erasure unit when a predetermined ratio or more of all the programs recorded in the first recording medium are executed. It is preferable to erase the program file copied from the recording medium from the second recording medium.

  According to the above configuration, when a program of a predetermined ratio or more is executed among all the programs recorded on the first recording medium, the second recording medium transfers to the first recording medium. Delete the recorded program file. That is, in the program execution device according to the present invention, it is determined that the first recording medium on which the program is executed at a predetermined rate or more is a recording medium that is not likely to be used by the user immediately.

  As a result, it is possible to preferentially erase program files that are considered to be unlikely to be executed by the user.

  In the program execution device according to the present invention, the recording means further executes a program included in the program file read from the first recording medium in addition to the program file that satisfies the predetermined condition. Accordingly, it is preferable to record the content acquired from the outside on the second recording medium.

  According to the above configuration, the content acquired by executing the program included in the read program file is also recorded on the second recording medium.

  As a result, the next time the program is executed, the processing for acquiring the content can be made unnecessary. Therefore, the program execution device according to the present invention has an effect of reducing the time required to reproduce the content acquired by executing the program included in the program file.

In the program execution method according to the present invention, in order to solve the above problem,
In a program execution method for executing a program recorded on a first recording medium or a second recording medium accessible at a higher speed than the first recording medium,
Among the program files recorded on the first recording medium, a program file satisfying a predetermined condition among program files including one or more programs is set as a recording target program file, and the recording target program file is If not recorded on the second recording medium, a recording step of recording the recording target program file on the second recording medium;
An execution step of executing a program recorded on the first recording medium, wherein if the program file including the program is recorded on the second recording medium, the program file is recorded on the second recording medium. An execution step of reading from the medium and executing the program;
It is characterized by including.

  According to said structure, there exists an effect similar to the program execution apparatus which concerns on this invention.

  In addition, a content playback device that plays back content that is operated by a program executed by the program execution device according to the present invention is also included in the scope of the present invention.

  Furthermore, a program for operating the program execution apparatus according to the present invention, characterized by causing a computer to function as each of the above-mentioned means, and a computer-readable recording medium on which these programs are recorded Are also included in the scope of the present invention.

  As described above, the program execution device according to the present invention is a program file recorded on the first recording medium, and is a program satisfying a predetermined condition among program files including one or more programs. If the file (recording target program file) is not recorded on the second recording medium, the recording target program file is recorded on the second recording medium. Further, the program execution device according to the present invention can execute the program recorded on the first recording medium if the program file including the program to be executed is recorded on the second recording medium. Is read from the second recording medium and executed. Note that the second recording medium is a recording medium having a higher access speed than the first recording medium.

  Thus, in the program execution device according to the present invention, it is possible to reduce the time required to execute the program to be executed while suppressing an increase in the recording capacity necessary for the second recording medium. Play.

It is a block diagram which shows the principal part structure of the content reproduction apparatus which concerns on embodiment. It is a figure which shows shortening of the reproduction time of an application when the jar file read first from a BD-J disk and the jar file read even-numbered are recorded on the recording part, (a) is the reproduction time at the time of the first reproduction. Yes, (b) is the playback time for the second and subsequent playbacks. It is a figure which shows shortening of the reproduction time of an application at the time of recording the jar file read after the BD-J disk first and the jar file read after a movie module file in a recording part, (a) is the reproduction | regeneration at the time of the first reproduction | regeneration (B) is a reproduction time at the second and subsequent reproductions. It is a figure which shows shortening of the reproduction time of an application at the time of recording the jar file first read from a BD-J disk, and the jar file which requires time for reading in a recording part, (a) is the reproduction time at the time of the first reproduction. Yes, (b) is the playback time for the second and subsequent playbacks. It is a figure which shows shortening of the playback time of an application when the next application is read by the previous application and the playback of the subsequent application is started during the playback of the previous application, (a) is the first playback (B) is the playback time for the second and subsequent playbacks. It is a figure which shows the management table of the jar file currently recorded on the recording part. It is a flowchart which shows the process which erases the jar file which has not been read more than predetermined time. It is a flowchart which shows the process which erases the jar file currently recorded on the BD-J disk whose reproduction frequency is below predetermined. It is a flowchart in the case of setting the threshold value of the elapsed time when deleting a jar file according to the number of reproductions. It is a flowchart which shows the process which erases the jar file currently recorded on the BD-J disk whose reproduction ratio is more than predetermined value. It is a figure which shows an example of the file structure in BD which employ | adopted BD-J.

Embodiment 1
An embodiment of a content reproduction apparatus provided with a program execution apparatus according to the present invention will be described below with reference to FIGS. Here, in the present embodiment, an example will be described in which a content playback device plays back content that is played back by processing a file read from an optical disk loaded in the device. More specifically, a case where the content reproduction apparatus is an apparatus capable of reproducing a Java application that operates according to a Java program read from the optical disc in addition to the reproduction of the movie content read from the optical disc is taken as an example. I will explain.

  The optical disc that can be used in the content reproduction apparatus according to the present embodiment is not particularly limited, but here, a BD employing BD-J (hereinafter also referred to as a BD-J disc) is loaded. Will be described as an example. In this case, specific examples of the content playback apparatus are a BD player apparatus and a BD recorder apparatus.

  The configuration of the content reproduction apparatus according to this embodiment will be described below.

(Configuration of content playback apparatus 100)
The configuration of the content reproduction apparatus according to the present embodiment will be described below with reference to FIG. FIG. 1 is a block diagram showing a main configuration of the content reproduction apparatus 100.

  As shown in FIG. 1, the content reproduction apparatus 100 includes a control unit 110, a memory 120, a recording unit 130, a content reproduction processing unit 140, a disk drive unit 150, an output unit 160, and a communication unit 170. The display unit 200 is not a member constituting the content reproduction apparatus 100, but is shown in FIG. 1 for convenience. Details of these members will be described below.

(Control unit 110)
The control unit 110 performs processing related to file reading from the BD-J disc loaded in the disk drive unit 150, processing related to file reading and recording from the recording unit 130, processing related to content playback in the content playback processing unit 140, and communication. Controls processing related to communication with the outside in the unit 170.

  Details of the control of each member in the control unit 110 will be described below, and the description thereof is omitted here.

(Memory 120)
The memory 120 is a main storage unit of the control unit 110. That is, the Java program read from the BD-J disc or the recording unit 130 by the control unit 110 is expanded in the memory 120.

  In addition, the memory 120 records time until a Java application that operates according to the Java program is reproduced, and also records control information when the content reproduction apparatus 100 reproduces the content.

(Recording unit 130)
The recording unit 130 records the BD-J module file (program file) read from the BD-J disc in the disc drive unit 150. Normally, a BD-J module file in which a Java program is stored is stored as one compressed file (hereinafter referred to as a jar file) for each application. It may be recorded in a state.

  Of course, the jar file may be expanded (decompressed) and recorded. Further, data to be recorded as a jar file and data to be expanded and recorded may be mixed. In this case, it is possible to reduce the time required to expand the jar file when executing the Java program, so that the ratio of the expanded data is increased unless the recording capacity of the recording unit 130 is insufficient. Is preferred.

  In addition to the jar file described above, the recording unit 130 may also record a bdjo file including management information on the BD-J disc.

  The type of the recording unit 130 is not particularly limited as long as the recording unit 130 is a recording medium whose data reading speed is faster than that of a BD-J disc (that is, an optical disc). A specific example of the recording unit 130 is a flash memory.

(Content reproduction processing unit 140)
The content reproduction processing unit 140 reproduces movie content (video content and audio content) read from the BD-J disc. In addition, the content reproduction processing unit 140 performs reproduction processing of a Java application that operates according to a Java program that is read from the BD-J disc or the recording unit 130 and loaded in the memory 120.

(Disk drive unit 150)
The disk drive unit 150 reads the file specified by the control unit 110 from the loaded BD-J disk. Further, the disk drive unit 150 may be writable in a specified area of a BD-J disk loaded with a file specified by the control unit 110.

  The disk drive unit 150 is detachable from the content reproduction apparatus 100 as an optical disk drive device when the loaded disk is an optical disk, and as a hard disk drive device when the loaded disk is a magnetic disk. It may be designed to.

(Output unit 160)
In response to the instruction from the control unit 110, the output unit 160 outputs the content reproduced by the content reproduction processing unit 140 to the display unit 200 at a predetermined timing.

(Communication unit 170)
The communication unit 170 performs data communication with an external apparatus connected to the content reproduction apparatus 100 via a network. For example, the communication unit 170 receives content from an external device. Also, the content recorded on the BD-J disc loaded in the recording unit 130 or the disc drive unit 150 is read, and the read content is transmitted to the external device.

(Display unit 200)
The display unit 200 is a display that displays the content output from the output unit 160. Examples of the display unit 200 include a liquid crystal display, an organic EL display, and a plasma display.

(Outline of operation of content reproduction apparatus 100)
Next, an outline of the content reproduction processing operation in the content reproduction apparatus 100 will be described below.

  First, when a BD-J disc is loaded in the disc drive unit 150, the control unit 110 instructs the content reproduction processing unit 140 to read a module file stored in the loaded BD-J disc. The content reproduction processing unit 140 that has received the instruction instructs the disk drive unit 150 to read the module file that has received the reading instruction from the control unit 110.

  Upon receiving the instruction, the disk drive unit 150 reads the module file from the loaded BD-J disk and outputs it to the reproduction processing unit 140.

  When the read module file is a movie file (moving image file, audio file), the control unit 110 instructs the content reproduction processing unit 140 to sequentially reproduce from the read data. In response to the instruction, the content reproduction processing unit 140 outputs the reproduced movie data to the output unit 160. The output unit 160 receives the instruction from the control unit 110 and outputs movie data output from the content reproduction processing unit 140 to the display unit 200. As a result, the movie content is displayed (and output) on the display unit 200.

  On the other hand, when the read module file is a jar file, the control unit 110 expands the jar file read from the BD-J disk in the memory 120. Then, the Java program is executed through a process of class loading the Java program (class file) obtained by the expansion into the Java virtual machine. At this time, in class loading, loading, linking, and initialization processing are performed.

  An application (content) that is operated by the executed Java program is reproduced by the content reproduction processing unit 140 and output to the output unit 160. The output unit 160 outputs the reproduced application to the display unit 200. As a result, the display unit 200 displays (or outputs) video (or audio) based on the Java application.

  Here, when the jar file read into the memory 120 is a file that satisfies a predetermined condition, the control unit 110 records the jar file in the recording unit 130.

  Next, when the BD-J disc that has been subjected to the playback process described above is played back again, the control unit 110 determines whether or not the jar file to be processed is recorded in the recording unit 130. When the jar file to be processed is recorded in the recording unit 130, the control unit 110 reads the jar file to be processed from the recording unit 130 instead of reading from the BD-J disc.

  If the jar file to be processed is not recorded in the recording unit 130, the jar file to be processed is read from the BD-J disc as before.

  As described above, in the content playback apparatus 100, when the BD-J disc is played back for the second time or later, the jar file recorded in the recording unit 130 is not the BD-J disc but the recording unit 130. Read from. Since the recording unit 130 has a faster data reading speed than the BD-J disc, the jar file reading time can be shortened compared to the first reproduction process. Below, the selection method of the jar file recorded on the recording part 130 is demonstrated.

(How to select jar file to record)
Next, among the jar files stored in the BD-J disc, details of a method for selecting a jar file to be recorded in the recording unit 130 will be described with reference to FIGS. 2 (a) and (b) to FIG. 5 (a) and (b). ) And will be described below.

  Here, the method for selecting the jar file to be recorded in the recording unit 130 is roughly divided into (1) a method for selecting a file read in a predetermined order, and (2) a time required for reproducing the Java application. Can be divided into a method for selecting a file having a large shortening effect. Hereinafter, each method will be described in detail.

(1: Select files read in a predetermined order)
The control unit 110 selects the jar file that is first read from the BD-J disc and records it in the recording unit 130. In other words, the predetermined condition is a condition that the jar file to be read first is recorded.

  By first recording the jar file read from the BD-J disc in the recording unit 130, the content is actually reproduced after the BD-J disc is loaded (or after the content is instructed to be reproduced). Can be shortened.

  In addition, by recording the first read jar file in the recording unit 130, it is possible to start reading the next read jar file during the development of the first read jar file and the reproduction of the application. .

  In addition, the control unit 110 may record the jar file read from the BD-J disc evenly or oddly from the BD-J disc in the recording unit 130. In other words, the predetermined condition is a condition that the jar file to be read evenly or oddly is recorded.

  FIGS. 2A and 2B show the effect of shortening the application reproduction waiting time when the first read jar file and the even-numbered jar file are recorded in the recording unit 130. FIG. FIGS. 2A and 2B are diagrams showing shortening of the playback time of the application when the first read jar file and the even-numbered jar file are recorded in the recording unit 130, and FIG. This is the reproduction time at the first reproduction, and (b) is the reproduction time at the second and subsequent reproductions.

  As shown in FIG. 2B, the first, second, and fourth jar files that are read are recorded in the recording unit 130 to reproduce the first, second, and fourth executed applications. The time required for the process can be shortened. Thereby, as a whole, the time required for reproduction from title 1 to title 4 can be shortened compared to the time of the first reproduction shown in FIG. At this time, since the third jar file to be read is not recorded in the recording unit 130, the recording capacity of the recording unit 130 can be saved.

  Further, the control unit 110 may record the jar file read after the movie module file in the recording unit 130.

  FIGS. 3A and 3B show the effect of shortening the reproduction time of the application when the recording unit 130 records the jar file read first and the jar file read after the movie module file. FIGS. 3A and 3B are diagrams showing shortening of the playback time of the application when the jar file read first and the jar file read after the movie module file are recorded in the recording unit 130. FIG. ) Is the playback time at the first playback, and (b) is the playback time at the second and subsequent playbacks.

  As shown in FIG. 3B, since the movie module file can sequentially reproduce the read data, it is instructed to reproduce the contents (application 2 and application 3) without being recorded in the recording unit 130. Therefore, it does not take a long time to actually reproduce the image.

  When the user waits for the next application to run after the content (application) is played back smoothly, the user has a feeling of being waited longer than the actual waiting time due to a sudden interruption. I sometimes feel it. In order to avoid such unpleasant feelings that occur to the user, a jar file that is read next to the movie module file is recorded in the recording unit 130, so that the waiting time after the user plays the movie can be compared with the user's subjectivity. Can be shortened effectively.

  If there are multiple recording units 130 and there is a difference in the file access speed between the recording units 130, the selection method and selection criteria for the jar file to be recorded for each recording unit with different access speeds are changed. You may make it do. Generally, the memory used for the recording unit 130 has a higher unit price as the access speed is higher. Therefore, when the recording capacity of the entire recording unit 130 is increased, the price of the recording unit 130 is reduced by using a relatively low-speed memory together with a part of the recording unit 130. Also good. In addition, in the flash memory, the reliability decreases as the data access speed increases. Therefore, when the flash memory is used for the recording unit 130, a part of the recording unit 130 has a relatively low speed but high reliability. These memories may be used together. As a result, the price of the recording unit 130 can be reduced and the reliability of the recording unit 130 can be improved.

  In such a case, it is preferable that the first read program file is recorded in the recording unit 130 with a slow access speed but high reliability, and the other program file is recorded in the recording unit 130 with a high access speed. As a result, it is possible to guarantee a reduction in the time required for executing a program that operates based on at least the first program file (the time required for application reproduction) and to save the recording capacity of the recording unit 130 having a high access speed. . Even in the recording unit 130 having a low access speed, the access speed is faster than that of the BD-J disk. Therefore, the time required until the program is executed rather than reading the program file to be executed first from the BD-J disk. Can be shortened.

  Of course, the present invention is not limited to recording only the first read program file in the recording unit 130 having a low access speed. Assuming that the recording capacity of the recording unit 130 having a high access speed can be saved, a plurality of program files read from the BD-J disc are recorded in the recording unit 130 having a low access speed. May be.

(2: When selecting a file with a large time-saving effect)
Next, a case will be described in which the control unit 110 selects and records in the recording unit 130 a file with a large effect of shortening the time required for playback of the Java application.

  In this case, the control unit 110 may preferentially record the jar file having a long time required for reading from the BD-J disc in the recording unit 130.

  The effect of shortening the time required for playback of the Java application increases as the difference between the reading speed of the jar file from the BD-J disc and the reading speed of the jar file from the recording unit 130 increases. Here, the process that can be most shortened by recording the jar file in the recording unit 130 is a loading process that has a large portion due to the performance of the content reproduction apparatus 100. Therefore, the control unit 110 can preferentially record the jar file, which takes a long time to read from the BD-J disc, in the recording unit 130, thereby effectively reducing the time required to reproduce the Java application. it can.

  An example of a jar file having a long time required for reading from a BD-J disc is a jar file having a large file size.

  When the content playback apparatus 100 plays back the BD-J disc loaded in the disc drive unit 150 for the first time or when played back until the previous time, the content playback apparatus 100 stores file data information that records all the file sizes of the read jar files. Create and record. Then, after the reproduction of the BD-J disc is completed, the control unit 110 reads a jar file having a large file size from the BD-J disc based on the created file data information, and causes the recording unit 130 to record it.

  At this time, the control unit 110 may select a jar file whose file size is equal to or larger than a predetermined threshold as a jar file to be recorded in the recording unit 130. Alternatively, the jar file having the largest file size may be recorded in the recording unit 130 in order, and may be recorded until the total capacity of the recorded jar file reaches a predetermined threshold. That is, recording may be performed in order from a jar file having a larger file size, and the recording may be stopped when a predetermined capacity is reached.

  In addition to the file size of the jar file, the control unit 110 may select the jar file to be recorded in the recording unit 130 with reference to the number of files stored in the jar file. Even if the file size is the same, the larger the number of files, the longer the time required for expansion. Therefore, in the case of the same file size, the jar file with the larger number of files is more preferentially recorded in the recording unit 130. By doing so, it is possible to further shorten the reproduction time. Note that the number of files stored in the jar file may be recorded together with the file data information.

  In this section, the case where the control unit 110 selects a jar file to be recorded in the recording unit 130 based on the file data information is described as an example. Of course, the file reading time or the file expansion time is described. And the jar file to be recorded in the recording unit 130 may be selected based on the measured reading time or development time.

  However, since the reading time or development time depends on the interrupt processing to the disk drive unit 150 and the quality of the surface of the loaded BD-J disk in the content reproduction apparatus 100, these factors may occur. In such a case, it is preferable to select a jar file to be recorded in the recording unit 130 based on the file data information. Conversely, if it is known that the influence of the above factors is small, a jar file to be recorded in the recording unit 130 may be selected based on the measured reading time or development time.

  For example, in general, even when a file having the same file size is read, a file stored in the outer peripheral portion can be read faster than the inner peripheral portion of the disk. In addition, if the file to be read next to execute the application is stored in a track far from the current position of the magnetic head of the disk drive, seek time to the target track and rotation waiting time are required. . In such a case, even when a file having the same file size is read, it takes a long time to read the average seek time as an expected value. Therefore, when the time required for playback of the Java application mainly depends on the file storage status on the disk, the jar file to be recorded in the recording unit 130 is selected based on the measured reading time or development time. It is preferable to make it.

  Note that the reading time or development time may be a time measured at a specific time when the BD-J disc loaded in the disc drive unit 150 is played for the first time or when played back by the previous time. That's fine. Of course, the time information obtained by statistically processing the time measured at a plurality of times from the first reproduction to the previous (most recent) reproduction may be used as the reading time or the development time. The statistical process may be a process using a simple average value, a weighted average value (for example, weighting the measured value at the time of the latest reproduction), a median value, or the like. Here, the plurality of times described above may be playback times in which the recording state of the jar file stored in the corresponding disk in the recording unit 130 is the same. For example, it may be the number of playback states in which no jar file is recorded in the recording unit 130, or the number of playback states in which some jar files stored on the disk are recorded in the recording unit 130.

  Furthermore, when the number of times of reproduction of the disc is large, a jar file stored on the disc may be additionally recorded in the recording unit 130. This is executed when it is estimated that it is beneficial for the user to reduce the time required to execute the program corresponding to the additionally recorded jar file. That is, the control unit 110 determines whether or not to additionally record a jar file in the recording unit 130 when the number of times the disc has been reproduced is greater than a predetermined number. As a result, the time required to execute the program can be further reduced by additionally recording the jar file in the recording unit 130 in accordance with the user's disk playback situation.

  The control unit 110 may select a jar file to be recorded in the recording unit 130 based on an application execution time including a reading time and a deployment time.

  Further, when selecting the jar file to be recorded in the recording unit 130, the control unit 110 selects the jar file to be recorded in the recording unit 130 based on the hard performance of the disk drive unit 150, the recording unit 130, and the disk. It may be.

  For example, when the content reproduction apparatus 100 includes a disk drive unit 150 (that is, an internal disk drive apparatus) and an external disk drive apparatus connected to the outside, the content reproduction apparatus 100 is attributed to the hardware performance of the disk drive apparatus. There may be a difference in the reading speed of the jar file between the internal disk drive device and the external disk drive device. For example, the data line (or the type of transmission medium) between the disk drive device and the control unit 110 differs between the internal disk drive device and the external disk drive device, resulting in a difference in the jar file read speed. Occurs. In addition, when the free capacity of the cache memory of the disk drive device is small, the amount of file read from the disk drive device is limited, so that the read speed is limited. In other words, the file reading speed varies depending on the free space of the cache memory for each disk drive device.

  As described above, when a difference occurs in the jar file reading speed due to the hardware of the disk drive device, the jar file read from the disk drive device having a low jar file reading speed is preferentially recorded. 130 may be recorded. In other words, the control unit 110 may record the read jar file in the recording unit 130 when reading the jar file from the disk drive device whose reading speed is equal to or lower than the predetermined performance.

  Furthermore, there may be a difference in the reading speed of the jar file due to the standard performance of the disk itself in which the java program is stored. In such a case, when the disk drive unit 150 reads the disk loaded in the disk drive unit 150, the disk drive unit 150 controls that the loaded disk is a disk that takes time to read the jar file. Notification to the unit 110. The control unit 110 that has received the notification may preferentially record the read jar file in the recording unit 130.

  Here, FIGS. 4A and 4B show the effect of shortening the playback time of the application when a large jar file (jar file that takes time to read) is recorded in the recording unit 130. FIG. FIGS. 4A and 4B are diagrams showing shortening of the playback time of the application when the jar file that is read first and the jar file that takes time to read are recorded in the recording unit 130. FIG. This is the reproduction time at the first reproduction, and (b) is the reproduction time at the second and subsequent reproductions.

  As shown in FIG. 4 (b), when a BD-J disc is reproduced for the first time, or at least when it has been reproduced up to the previous time, a jar file for storing a Java program for operating the application 2 that takes the most time for loading. By recording in the recording unit 130, it is possible to reduce the time required until the application 2 is reproduced. Thereby, as a whole, the time required for reproduction from title 1 to title 3 can be shortened as compared with the first reproduction shown in FIG. That is, by selecting a jar file to be recorded in the recording unit 130 based on the execution time of the application including the reading time and the development time, the time required to reproduce the content while suppressing an increase in the recording capacity of the recording unit 130 Can be shortened.

  Here, in order to further suppress the increase in the recording capacity of the recording unit 130, when the previous application is played back until the time when the next application is played back, a Java program for operating the next application is executed. The jar file to be stored is not recorded in the recording unit 130. That is, only the jar file that stores the Java program that operates the previous application may be recorded in the recording unit 130.

  For example, as shown in FIGS. 5A and 5B, when a jar file storing a Java program for operating the application 3 is read out by the application 2, the control unit 110 performs the application during playback of the application 2. 3 is completed and the application 3 can be played back. That is, since the application 3 is reproduced during the reproduction of the application 2, it is not necessary to record the jar file storing the Java program for operating the application 3 in the recording unit 130.

  In this case, even if the file size or the number of files is larger than a predetermined threshold, if the application can be played back during playback of the previously played back application, the file is recorded in the recording unit 130. Preferably not.

  In this way, by not recording the jar file that does not contribute to the reduction of the time required for content reproduction in the recording unit 130, an increase in the recording capacity of the recording unit 130 can be further suppressed.

  5A and 5B show the playback time of the application when the next application is read by the previous application and the playback of the subsequent application is started during the playback of the previous application. It is a figure which shows shortening, (a) is the reproduction time at the time of the first reproduction | regeneration, (b) is the reproduction time at the time of the reproduction | regeneration after the 2nd time.

(Combination of selection conditions)
In the above description, the case where the jar file to be recorded in the recording unit 130 is a file read in a predetermined order and a case where the jar file is a file having a large time shortening effect are examples. Of course, two selection methods may be used in combination.

  For example, as shown in FIG. 4B and FIG. 5B, the jar file that is read first is always recorded in the recording unit 130, and a file that greatly reduces the playback time of the application is recorded in the recording unit 130. May be recorded.

  Further, when a file having a large effect of shortening the playback time of an application is selected and recorded in the recording unit 130, the time shortening effect is estimated, and when the estimated result does not have a great effect on the time shortening. May record the files read in a predetermined order in the recording unit 130. This is effective, for example, when the file sizes of the jar files are almost the same size.

(File management method)
Next, a file management method for the jar file recorded in the recording unit 130 will be described below with reference to FIG. FIG. 6 is a diagram illustrating a management table for jar files recorded in the recording unit 130.

  As described above, when the control unit 110 plays the BD-J disc loaded in the disc drive unit 150 for the second time or later, whether the jar file to be read is a jar file recorded in the recording unit 130. Determine whether or not. At this time, the control unit 110 refers to the file management table as shown in FIG. 6 and determines whether or not the jar file to be read is recorded in the recording unit 130.

  As shown in FIG. 6, in the file management table, disc title information, reproduction history information, and saved file information are recorded in association with a disc ID. The reproduction history information includes the information of the corresponding disc ID for the first reproduction date and time, the previous reproduction date and time, the previous reproduction end point and the number of reproductions, and the saved file information includes saved title, saved file name, corresponding application and related application information including.

  For example, the disc with the disc ID “00010” shown in FIG. 6 has information indicating the content name “disc 1” as the disc title information. The disc with the disc ID “00010” is played for the first time “August 20, 2008 at 11:20”, and the last played date is “December 10, 2008 at 20:15”. ”, Indicating that the playback has been completed at the time of“ 50 minutes 30 seconds ”when it was last played, and“ 3 times ”has been played so far. Furthermore, “File11.jar” stored in the disk with the disk ID “00010” is recorded in the recording unit 130. This “File11.jar” corresponds to “Title1” and indicates that it is a file for reproducing “Application1”.

  In addition to the information indicating the content name, the disc title information may include information on each chapter and each title, information such as a recording length, a content genre, and content-associated information. The content reproduction apparatus 100 may perform processing based on these pieces of information.

  In the disk with the disk ID “00010”, one storage file information is associated with one disk ID, but two or more storage file information may be associated with one disk ID. For example, as shown in FIG. 6, in the case of the disc with the disc ID “00101”, two pieces of information relating to “File22.jar” and information relating to “File23.jar” are associated as saved file information. In addition, in the case of the disc with the disc ID “01000”, three pieces of information are associated as saved file information.

  Note that “File23.jar” indicates a jar file that is read out by playing “Application2”. Accordingly, the control unit 110 can recognize that “File23.jar” is read during reproduction of “Application2” by referring to the management table shown in FIG. Prefetching can also be performed.

  The file management table shown in FIG. 6 is used to determine whether or not a jar file to be read by the control unit 110 is recorded in the recording unit 130 as described above, and the jar file recorded in the recording unit 130 It is also used during the erasing process. Deletion processing of the jar file recorded in the recording unit 130 will be described below.

  The file management table may be recorded in the recording unit 130, or may be recorded in the memory 120 or another memory (not shown).

  For example, when the disk drive unit 150 includes a control unit independent of the control unit 110 and a data memory capable of storing a jar file, the disk drive unit 150 includes a file management table. The data may be recorded in a stored data memory.

  In this case, the control unit 110 and the content reproduction processing unit 140 do not need to recognize whether the read file is a file read directly from the disc or a file read from the recording unit 130. It is possible to reduce the load applied during the control process. Further, it is possible to reduce the access frequency to the memory bus by simultaneously performing the memory access by the reproduction processing in the content reproduction processing unit 140 and the memory access for reading the recording file.

  The data memory capable of storing the file management table and the jar file is preferably a memory different from the cache memory for caching data recorded on the BD-J disc.

(Erasing process of jar file recorded in recording unit 130)
Next, details of processing when deleting the jar file recorded in the recording unit 130 will be described below with reference to FIGS.

(Erase disk jar files that have not been played for a certain period of time)
First, processing for deleting a jar file that has not been read for a predetermined time or more will be described below with reference to FIGS. 6 and 7. FIG. 7 is a flowchart illustrating a process of deleting a jar file that has not been read for a predetermined time.

  The control unit 110 determines whether or not a jar file is recorded in the recording unit 130 (step S1). That is, it is determined whether or not the disk ID is recorded in the file management table.

  When the jar file is recorded in the recording unit 130 (Yes in step S1), the control unit 110 has the disc ID from the information on the previous reproduction date and time in the reproduction history information associated with a certain disc ID and the current time. The elapsed time from the last playback of the BD-J disc to the present is calculated (step S2).

  When the calculated elapsed time is equal to or greater than the predetermined threshold (Yes in Step S3), the control unit 110 deletes the saved file information (that is, the jar file) associated with the currently processed disk ID. The reproduction history information, disc title information, and disc ID are also deleted (step S4). On the other hand, when the calculated elapsed time is equal to or less than the predetermined threshold (No in step S3), the control unit 110 does not delete the saved file information (jar file) associated with the currently processed disk ID. .

  Next, the control unit 110 determines whether or not the processing has been completed for all the disk IDs recorded in the file management table (step S5).

  When the process is completed for all the disk IDs (Yes in step S5), the control unit 110 ends the jar file deletion process. If the processing has not been completed for all the disk IDs (No in step S5), the control unit 110 calculates the elapsed time from the reproduction history information associated with the next disk ID. That is, the control unit 110 repeats the processing from step S2 until the processing for all the disk IDs is completed.

  Through the above-described processing, the jar file recorded on the BD-J disc that has not been reproduced for a certain period of time can be deleted from the recording unit 130. Thereby, it is possible to avoid a shortage of the recording capacity of the recording unit 130.

  The elapsed time threshold value may be a fixed value set in advance, or may be a variable value appropriately set by the user.

(Erases jar files recorded on a disk with a small number of playbacks)
Next, processing for deleting a jar file recorded on a BD-J disc with a small number of playbacks will be described below with reference to FIGS. FIG. 8 is a flowchart showing a process of deleting a jar file recorded on a BD-J disc whose number of reproductions is less than a predetermined number. In FIG. 8, the process of deleting the jar file of the BD-J disk with a small number of playbacks and the process of deleting the jar file of the BD-J disk that has not been played back for a certain period of time as described above are combined. The process of is shown.

  The control unit 110 determines whether or not a jar file is recorded in the recording unit 130 (Step S10). That is, it is determined whether or not the disk ID is recorded in the file management table.

  When the jar file is recorded in the recording unit 130 (Yes in step S10), the control unit 110 determines whether or not the number of reproductions of the reproduction history information associated with a certain disk ID is equal to or greater than a predetermined number. (Step S11). When the number of reproductions is equal to or less than the predetermined number (No in step S11), the control unit 110 calculates the elapsed time from the previous reproduction of the BD-J disc having the disc ID to the present, as before. (Step S12). On the other hand, when the calculated elapsed time is equal to or less than the predetermined threshold, the control unit 110 does not delete the saved file information (that is, the jar file) associated with the currently processed disk ID.

  When the calculated elapsed time is equal to or greater than the predetermined threshold (Yes in Step S13), the control unit 110 deletes the saved file information (jar file) associated with the currently processed disk ID and plays back the file. The history information, disc title information, and disc ID are also deleted (step S14). On the other hand, when the calculated elapsed time is equal to or less than the predetermined threshold (No in step S13), the control unit 110 uses the saved file information (that is, the jar file) associated with the currently processed disk ID. Do not delete.

  Next, the control unit 110 determines whether or not the processing has been completed for all the disk IDs recorded in the file management table (step S15).

  When the process has been completed for all the disk IDs (Yes in step S15), the control unit 110 ends the jar file deletion process. If the processing has not been completed for all the disk IDs (No in step S15), the control unit 110 calculates the elapsed time from the reproduction history information associated with the next disk ID. That is, the control unit 110 repeats the processing from step S11 until the processing for all the disk IDs is completed.

  As described above, by selecting a BD-J disc whose number of playbacks is equal to or less than a predetermined threshold as a disc from which a jar file is to be deleted, priority is given to the jar file of a BD-J disc that the user is unlikely to use. Can be erased from the recording unit 130. As a result, it is possible to avoid a shortage of the recording capacity of the recording unit 130, and it is possible to delete the jar file according to the usage status of the user.

  Also, as shown in FIG. 9, by combining the number of playback times and the elapsed time, a jar file of a BD-J disc that has a low user usage count and a long elapsed time from the previous playback can be obtained. It is possible to erase from the recording unit 130 with priority. As a result, it is possible to avoid a shortage of the recording capacity of the recording unit 130, and it is possible to further delete the jar file in accordance with the usage status of the user.

  Note that the threshold value for the number of times of reproduction may be a fixed value set in advance, or may be a variable value appropriately set by the user.

(The threshold changes according to the number of playbacks)
In the above-described erasing process, the case where the jar file erasing process is performed under the independent conditions of the number of times of reproduction and the elapsed time has been described. A jar file erasing process for setting a threshold for erasing a jar file according to the number of reproductions will be described below with reference to FIG. FIG. 9 is a flowchart in the case where the threshold value of the elapsed time when deleting the jar file is set according to the number of reproductions.

  The control unit 110 determines whether or not a jar file is recorded in the recording unit 130 (step S20). That is, it is determined whether or not the disk ID is recorded in the file management table.

  When the jar file is recorded in the recording unit 130 (Yes in Step S20), the control unit 110 has the disc ID from the information regarding the previous reproduction date and time in the reproduction history information associated with a certain disc ID and the current time. The elapsed time from the last playback of the BD-J disc to the present is calculated (step S21).

  Subsequently, the control unit 110 determines whether or not the number of reproductions of the reproduction history information associated with a certain disc ID is equal to or greater than a predetermined number (step S22). When the number of times of reproduction is equal to or greater than the predetermined number of times (Yes in step S22), control unit 110 sets value A as a threshold value (step S23). Next, the control unit 110 determines whether or not the elapsed time calculated in step S21 is equal to or greater than the threshold value (value A) set in step S23 (step S24).

  When the elapsed time calculated in step S21 is equal to or greater than the threshold value (value A) set in step S23 (Yes in step S24), the control unit 110 saves the file associated with the currently processed disk ID. The information (jar file) is deleted, and the reproduction history information, disc title information, and disc ID are also deleted (step S25). When the elapsed time calculated in step S21 is equal to or less than the threshold value (value A) set in step S23 (No in step S24), the control unit 110 is associated with the currently processed disk ID. Do not delete saved file information (ie jar file).

  On the other hand, when the number of reproductions is equal to or less than the predetermined number (No in step S22), control unit 110 sets value B as a threshold (step S26). At this time, the value B is smaller than the value A. That is, a smaller threshold is set for a BD-J disc with a small number of playbacks.

  Similarly to the case where the value A is set as the threshold value, when the elapsed time calculated in step S21 is equal to or greater than the threshold value (value B) set in step S23 (Yes in step S24), the control unit 110 The stored file information (jar file) associated with the currently processed disc ID is deleted, and the reproduction history information, disc title information, and disc ID are also deleted (step S25).

  If the elapsed time calculated in step S21 is equal to or less than the threshold value (value B) set in step S23 (No in step S24), the control unit 110 is associated with the currently processed disk ID. Does not delete saved file information (jar file).

  Finally, the control unit 110 determines whether or not the processing has been completed for all the disk IDs recorded in the file management table (step S27).

  When the processing has been completed for all the disk IDs (Yes in step S27), the control unit 110 ends the jar file deletion processing. If the processing has not been completed for all the disc IDs (No in step S27), the control unit 110 calculates the elapsed time from the reproduction history information associated with the next disc ID. That is, the control unit 110 repeats the processing from step S21 until the processing for all the disk IDs is completed.

  As described above, by setting a threshold according to the number of playbacks, even if the elapsed time from the previous playback is the same, the jar file of the BD-J disc with the lower playback count is preferentially deleted. Can be done. As a result, it is possible to avoid a shortage of the recording capacity of the recording unit 130, and it is possible to further delete the jar file in accordance with the usage status of the user.

  Note that the value A and the value B in the processing described above may be fixed values set in advance or may be variable values appropriately set by the user.

  In the above description, the stored file is determined to be erased based on the previous reproduction date and time, but the present invention is not limited to this. The erasure determination may be performed based on information other than the previous reproduction date. For example, the stored file erasure determination may be performed based on information such as the first reproduction date, the previous disc loading date, or the first disc loading date.

(Erases jar files with a large playback ratio)
Next, a process for deleting a jar file recorded on a BD-J disc having a large reproduction ratio will be described below with reference to FIGS. FIG. 10 is a flowchart showing a process of deleting a jar file recorded on a BD-J disc having a playback ratio equal to or higher than a predetermined value.

  The control unit 110 determines whether or not a jar file is recorded in the recording unit 130, similarly to the above (step S30). That is, it is determined whether or not the disk ID is recorded in the file management table.

  When the jar file is recorded in the recording unit 130 (Yes in step S30), the control unit 110 determines the BD- associated with a certain disc ID from the previous reproduction end point in the reproduction history information associated with the certain disc ID. It is determined whether or not the J disk has been stopped during reproduction (step S31). When the BD-J disc is stopped in the middle of reproduction (Yes in Step S31), the control unit 110 determines whether or not the reproduction ratio is a predetermined threshold abnormality (Step S32).

  When the reproduction ratio is equal to or greater than the predetermined threshold (Yes in step S32), the control unit 110 deletes the saved file information (jar file) associated with the currently processed disk ID, and also reproduces the reproduction history information, the disk The title information and disc ID are also deleted (step S33).

  When the reproduction ratio is equal to or lower than the predetermined threshold (No in step S32), the control unit 110 does not erase the saved file information (jar file) associated with the currently processed disk ID.

  On the other hand, when the BD-J disc is not stopped during playback (No in step S31), the control unit 110 deletes the saved file information (jar file) associated with the currently processed disc ID. The reproduction history information, disc title information, and disc ID are also deleted (step S33).

  Finally, the control unit 110 determines whether or not the processing has been completed for all the disk IDs recorded in the file management table (step S34).

  When the processing has been completed for all the disk IDs (Yes in step S34), the control unit 110 ends the jar file deletion processing. If the processing has not been completed for all the disc IDs (No in step S34), the control unit 110 calculates the elapsed time from the reproduction history information associated with the next disc ID. That is, the control unit 110 repeats the processing from step S31 until the processing for all the disk IDs is completed.

  In the above-described processing, the jar file of the BD-J disc having a reproduction ratio larger than a predetermined threshold is preferentially deleted. This is because when the content recorded on the BD-J disc has been played back at a predetermined rate or more, the user has almost finished viewing the content, and at least the same user immediately has removed the BD-J disc. It is because it is thought that it does not reproduce.

  As a result, it is possible to avoid a shortage of the recording capacity of the recording unit 130, and it is possible to further delete the jar file in accordance with the usage status of the user.

  Note that the “playback ratio” in this section refers to the ratio of time during which playback is completed with respect to the total playback time of content. However, in the case of a BD-J disc that includes ancillary content such as a bonus video or a game, the playback with respect to the playback time of the main content excluding the ancillary content (for example, content corresponding to the main part of a movie if a movie) Refers to the percentage of time completed.

  In addition, the reproduction ratio threshold value may be a fixed value set in advance, or may be a variable value appropriately set by the user.

(Additional notes regarding jar file deletion processing)
In the jar file erasing process described above, a case where a jar file is erased from the recording unit 130 when a BD-J disc is not loaded in the disc drive unit 150 is described as an example. Here, the jar file may be deleted when a BD-J disk is loaded in the disk drive unit 150. For example, there may be a case where a disc is loaded but no disc playback is performed (for example, the content playback apparatus is in an idle state).

  The disk drive unit 150 reads the disk ID of the loaded BD-J disk. Then, the control unit 110 determines whether to delete the saved file information associated with the read disk ID. The determination process may be the same as the process described above.

  In the above-described processing, jar files stored on the corresponding BD-J disc may be deleted at once. For example, as shown in FIG. 6, in the case of a disk with a disk ID “01000”, the recording unit 130 has three jar files “File31.jar”, “File32.jar”, and “File33.jar”. Since these are recorded, these three jar files are deleted at once.

  Further, a part of the jar file stored in the corresponding BD-J disk may be deleted. For example, in the example illustrated in FIG. 6, when “File31.jar” is a jar file that stores a Java program that operates “Application1” that is an application to be played first, only “File31.jar” is deleted. You may make it record in the recording part 130, without doing.

  In this way, by recording in the recording unit 130 the jar file that stores the Java program that runs the application to be reproduced first, while ensuring the recording capacity of the recording unit 130, It is possible to reduce the time required for playing the played application.

(Downloading additional content from external devices)
The content reproduction apparatus 100 has a function of acquiring additional content via a network based on the application to be reproduced. The content reproduction apparatus 100 may cause the recording unit 130 to record additional content acquired via the network. Further, as in the above-described recording of the jar file, some files of the additional content may be selected and recorded.

  More specifically, the control unit 110 instructs the communication unit 170 to acquire additional content via a network, based on an application that is operated by a Java program developed in the memory 120. Receiving the instruction, the communication unit 170 acquires additional content designated by the control unit 110 via the network.

  When the communication unit 170 acquires additional content, the control unit 110 instructs the content reproduction processing unit 140 to reproduce the acquired additional content. The content reproduction processing unit 140 reproduces the acquired additional content and outputs it to the output unit 160.

  The output unit 160 outputs video and audio to the display unit 200 in accordance with instructions from the control unit 110.

  The network for the communication unit 170 to acquire additional content is not particularly limited. For example, the content reproduction device 100 may acquire (download) additional content from an external device (for example, a content server device) connected to the content reproduction device 100 via the Internet.

  Further, as the additional content, for example, related content related to the content stored on the BD-J disc (performer related information, series related information, new work information, etc.), additional subtitles, game data of additional games, etc. Can include extended content. For example, when the additional content is extended content such as additional subtitles, the function of the content to be reproduced can be temporarily extended.

  The acquired additional content may be recorded in the recording unit 130. By recording the additional content in the recording unit 130, the time for re-acquiring the additional content via the network can be eliminated when the BD-J disc is reproduced next time, which is necessary for content reproduction. Time can be shortened. Further, even when the network environment for acquiring the additional content is unstable due to some factor or when network communication is not possible, the recorded additional content can be used. As a result, it is possible to reproduce the content in substantially the same manner as in the case of via the network.

(Additional notes)
In the present embodiment, a content playback apparatus that records a jar file read from an optical disc (for example, a BD-J disc) in a recording unit 130 (for example, a flash memory) is described as an example. Is not to be done.

  For example, it may be a content playback apparatus that records a jar file read from a magnetic disk (so-called hard disk) in a recording unit 130 (for example, a flash memory). Furthermore, it may be a content playback apparatus that records a jar file read from an optical disk (for example, a BD-J disk) on a magnetic disk (so-called hard disk).

  That is, the type of each recording medium is not particularly limited as long as one recording medium has a higher data reading speed than the other recording medium.

(Program and recording medium)
Finally, the control unit 110 provided in the content reproduction apparatus 100 may be configured by hardware logic. Alternatively, it may be realized by software using a CPU (Central Processing Unit) as follows.

  That is, the control unit 110 includes a CPU that executes instructions of a program that realizes each function, a ROM (Read Only Memory) that stores the program, a RAM (Random Access Memory) that expands the program into an executable format, and And a storage device (recording medium) such as a memory for storing the program and various data. With this configuration, the object of the present invention can be achieved by a predetermined recording medium.

  The recording medium only needs to record the program code (execution format program, intermediate code program, source program) of the program of the control unit 110, which is software that realizes the above-described functions, in a computer-readable manner. The recording medium is supplied to the control unit 110. Thus, the control unit 110 (or CPU or MPU) as a computer may read and execute the program code recorded on the supplied recording medium.

  The recording medium for supplying the program code to the control unit 110 is not limited to a specific structure or type. That is, the recording medium includes, for example, a tape system such as a magnetic tape and a cassette tape, a magnetic disk such as a floppy (registered trademark) disk / hard disk, and an optical disk such as a CD-ROM / MO / MD / DVD / CD-R. System, a card system such as an IC card (including a memory card) / optical card, or a semiconductor memory system such as a mask ROM / EPROM / EEPROM / flash ROM.

  Further, even if the content reproduction apparatus 100 is configured to be connectable to a communication network, the object of the present invention can be achieved. In this case, the program code is supplied to the control unit 110 via the communication network. The communication network is not limited to a specific type or form as long as it can supply the program code to the control unit 110. For example, it may be the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication network, and the like.

  The transmission medium constituting the communication network may be any medium that can transmit the program code, and is not limited to a specific configuration or type. For example, wired communication such as IEEE 1394, USB (Universal Serial Bus), power line carrier, cable TV line, telephone line, ADSL (Asymmetric Digital Subscriber Line) line, infrared rays such as IrDA and remote control, Bluetooth (registered trademark), 802.11 It can also be used by radio such as radio, HDR, mobile phone network, satellite line, terrestrial digital network. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and the embodiments obtained by appropriately combining the technical means disclosed in the embodiments are also applicable. It is included in the technical scope of the present invention.

  The program execution device according to the present invention can be widely applied to content playback devices such as player devices and recorder devices that play back content by playing back optical discs.

100 content playback device (content playback device)
110 Control unit (recording means, execution means, first determination means, second determination means, erasure means)
120 memory 130 recording unit (second recording medium)
140 Content playback processing unit 150 Disc drive unit (reading unit)
160 Output unit 170 Communication unit 200 Display unit

Claims (13)

A program execution device for executing a program recorded on a first recording medium or a second recording medium accessible at a higher speed than the first recording medium,
Among the program files recorded on the first recording medium, a program file satisfying a predetermined condition among program files including one or more programs is set as a recording target program file, and the recording target program file is If not recorded on the second recording medium, recording means for recording the recording target program file on the second recording medium;
Execution means for executing a program recorded on the first recording medium, and if the program file including the program is recorded on the second recording medium, the program file is recorded on the second recording medium. Execution means for reading from the medium and executing the program;
First determining means for determining, for each of the program files recorded on the first recording medium, whether a time required for executing the program included in the program file is equal to or greater than a predetermined threshold value. Prepared,
The recording means records the program file determined by the first determining means as the required time being equal to or greater than a predetermined threshold value as a recording target program file on the second recording medium,
The first determination means determines that a program file whose file size is a predetermined threshold or more is a program file whose required time is a threshold or more. The end time of the first content that operates by executing the program included in the first program file and the program included in the second program file read before the first program file are executed. And a second determination means for determining the start time of the second content that operates by
The recording means is a program file determined by the first determination means that the required time is greater than or equal to a threshold, and the start time of the second content is determined by the second determination means by the first content. 2. The program execution device according to claim 1 , wherein a program file determined to be later than an end time of the program is recorded on the second recording medium.   A program execution device for executing a program recorded on a first recording medium or a second recording medium accessible at a higher speed than the first recording medium,
  Among the program files recorded on the first recording medium, a program file satisfying a predetermined condition among program files including one or more programs is set as a recording target program file, and the recording target program file is If not recorded on the second recording medium, recording means for recording the recording target program file on the second recording medium;
  Execution means for executing a program recorded on the first recording medium, and if the program file including the program is recorded on the second recording medium, the program file is recorded on the second recording medium. Execution means for reading from the medium and executing the program;
  First determining means for determining, for each of the program files recorded on the first recording medium, whether a time required for executing the program included in the program file is equal to or greater than a predetermined threshold value. Prepared,
  The recording means records the program file determined by the first determining means as the required time being equal to or greater than a predetermined threshold value as a recording target program file on the second recording medium,
  The end time of the first content that operates by executing the program included in the first program file and the program included in the second program file read before the first program file are executed. And a second determination means for determining the start time of the second content that operates by
  The recording means is a program file determined by the first determination means that the required time is greater than or equal to a threshold, and the start time of the second content is determined by the second determination means by the first content. A program execution device for recording a program file determined to be later than the end time of the second recording medium on the second recording medium. When the first recording medium satisfies a predetermined condition, the apparatus further comprises an erasing unit for erasing the program file copied from the first recording medium from the second recording medium. The program execution device according to any one of claims 1 to 3 . The erasing means is copied from the first recording medium when the elapsed time since the execution of the program included in the program file recorded on the first recording medium is a predetermined time or more. 5. The program execution device according to claim 4 , wherein the program file is erased from the second recording medium. The erasing means removes the program file copied from the first recording medium when the number of executions of the program included in the program file recorded on the first recording medium is equal to or less than a predetermined number. program execution device according to claim 4 or 5, characterized in that erase the second recording medium. The erasing means stores a program file copied from the first recording medium when the program of a predetermined ratio or more is executed among all the programs recorded on the first recording medium. program execution device according to any one of claims 4 to 6, characterized in that erase the second recording medium. In addition to the program file that satisfies the predetermined condition, the recording means executes content included from the outside by executing a program included in the program file read from the first recording medium. program execution device according to any one of claims 1 to 7, characterized in that to be recorded in the second recording medium. In a program execution method for executing a program recorded on a first recording medium or a second recording medium accessible at a higher speed than the first recording medium,
Among the program files recorded on the first recording medium, a program file satisfying a predetermined condition among program files including one or more programs is set as a recording target program file, and the recording target program file is If not recorded on the second recording medium, a recording step of recording the recording target program file on the second recording medium;
An execution step of executing a program recorded on the first recording medium, wherein if the program file including the program is recorded on the second recording medium, the program file is recorded on the second recording medium. An execution step of reading from the medium and executing the program ;
A first determination step for determining, for each of the program files recorded on the first recording medium, whether a time required for executing the program included in the program file is equal to or greater than a predetermined threshold value; Including
In the recording step, the program file determined in the first determination step that the required time is determined to be greater than or equal to a predetermined threshold is recorded as a recording target program file on the second recording medium,
In the first determination step, a program execution method is characterized in that it is determined that a program file having a file size equal to or larger than a predetermined threshold is a program file whose required time is equal to or larger than the threshold .   In a program execution method for executing a program recorded on a first recording medium or a second recording medium accessible at a higher speed than the first recording medium,
  Among the program files recorded on the first recording medium, a program file satisfying a predetermined condition among program files including one or more programs is set as a recording target program file, and the recording target program file is If not recorded on the second recording medium, a recording step of recording the recording target program file on the second recording medium;
  An execution step of executing a program recorded on the first recording medium, wherein if the program file including the program is recorded on the second recording medium, the program file is recorded on the second recording medium. An execution step of reading from the medium and executing the program;
  A first determination step for determining, for each of the program files recorded on the first recording medium, whether a time required for executing the program included in the program file is equal to or greater than a predetermined threshold value; Including
  In the recording step, the program file determined in the first determination step that the required time is determined to be greater than or equal to a predetermined threshold is recorded as a recording target program file on the second recording medium,
  The end time of the first content that operates by executing the program included in the first program file and the program included in the second program file read before the first program file are executed. A second determination step of determining the start time of the second content that operates by
  The recording step is a program file for which the required time is determined to be greater than or equal to a threshold value in the first determination step, and the start time of the second content in the second determination step is the first content. A program execution method comprising: recording a program file determined to be later than the end time of the second recording medium on the second recording medium. Content reproducing apparatus for reproducing content that operates from a program that is executed by a program execution device according to any one of claims 1 to 8. A program for operating a computer included in the program execution device according to any one of claims 1 to 8 , wherein the program causes the computer to function as each means described above. A computer-readable recording medium in which the program according to claim 12 is recorded.

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