JP2012181892A - Recording medium reproducing device, recording medium reproducing method, and computer program - Google Patents

Abstract

A recording medium reproducing apparatus capable of executing resume reproduction of an optimum method is provided.
A recording medium playback apparatus 100 includes a pickup 11 that reads content and a BD-J application from a BD-ROM 10, and a BD-J application execution unit 151 that can execute resume playback by executing the BD-J application. , A simple playback unit 152 capable of executing simple resume playback without activating the BD-J application, and a playback control unit 155 that determines whether or not the BD-J application has a resume playback function. When the unit 155 determines that the BD-J application has a resume playback function, the unit 155 causes the BD-J application execution unit 151 to execute resume playback, and determines that the BD-J application does not have a resume playback function. In this case, the simple replay unit 152 has a simple cash register. To execute the over-time playback.
[Selection] Figure 1

Description

  The present invention relates to a recording medium reproducing apparatus, a recording medium reproducing method, and a computer program for reproducing data recorded on a recording medium such as a BD-ROM, and in particular, a recording medium reproducing apparatus and a recording medium for performing resume reproduction of a recording medium. The present invention relates to a reproduction method and a computer program.

  In recent years, recording medium playback apparatuses (hereinafter simply referred to as “playback apparatuses”) that play back large-capacity recording media that record information with high image quality, high sound quality, and advanced interactive functions have become widespread.

  A typical playback device among them is a playback device for a Blu-ray Disc (BD: Blu-ray Disc, hereinafter referred to as “BD”). The BD has a huge data capacity of 25 GB for a single layer and 50 GB for a double layer, and can store high-definition movie content. Commercially available package software and rental package software using the BD are read-only media that cannot be added or rewritten as data is written during the manufacturing process, and are used as BD-ROM (Blu-ray-Read-Only-Memory). Is provided.

  This BD-ROM has two types of formats, an HDMV mode and a BD-J mode. The HDMV mode is an extension of the conventional DVD-ROM format video and audio codec specifications, and can store and reproduce high-definition video and high-quality audio. The content specification in the HDMV mode is the same as that of the DVD-ROM. On the other hand, in the BD-J mode, in addition to the HDMV mode, a visual expression such as superimposing images can be added by a Java (registered trademark) application (hereinafter referred to as “BD-J application”). .

  Here, in the HDMV mode, when the reproduction is stopped in the middle of reproducing the content and then started again, the reproduction can be resumed from the position where the reproduction was previously stopped. Hereinafter, restarting playback after stopping playback once is referred to as “resume playback”.

  In the HDMV mode, when the playback is stopped in the middle of the playback of the content, the playback device stores the playback location in the nonvolatile memory in the playback device, and when the playback is performed again, the playback location from the nonvolatile memory is stored. Is resumed and the above-mentioned resume reproduction is realized.

  On the other hand, in the BD-J mode, since playback is performed by the BD-J application as described above, resume playback cannot be performed in the same manner as in the HDMV mode.

  Therefore, in some BD-J mode BD-ROMs, information necessary for the BD-J application to resume playback is stored in the playback device. During playback, when the playback device starts the BD-J application, the BD-J application reads information stored in the playback device and performs resume playback (see, for example, Patent Document 1). Hereinafter, the resume reproduction performed by the BD-J application is referred to as “content resume reproduction”.

  However, not all of the BD-J applications in the BD-J mode BD-ROM have the above-described content resume playback function, and BD-J in some BD-J mode BD-ROMs. The application does not have a content resume playback function.

  Therefore, as a playback device that enables resume playback of a BD-J mode BD-ROM, when playback is stopped, the stop location is stored in the nonvolatile memory in the same manner as in the HDMV mode, and playback is performed again. Has also proposed a playback apparatus that performs resume playback in the same manner as in the HDMV mode without starting a BD-J application (see, for example, Patent Document 2). Hereinafter, resume playback performed in the same manner as HDMV without starting the BD-J application on the BD-J mode BD-ROM will be referred to as “simple resume playback”.

JP 2009-193642 A JP 2010-33628 A

  However, according to a playback device that starts a BD-J application as usual during playback and leaves the resume playback to the BD-J application, the BD-J application of the BD-ROM has a function of content resume playback. If not, resume playback cannot be performed.

  On the other hand, a playback device that performs simple resume playback can reliably resume playback regardless of whether the BD-J application of the BD-ROM has a function of content resume playback. The BD-J application has a function of content resume playback, and resume playback can be performed without starting the BD-J application even for a BD-ROM that can be resumed even when played by the BD-J application. It will be. As a result, other functions such as superimposing images provided in the BD-J application cannot be used for the BD-ROM that can be resumed even when played by the BD-J application.

  Note that the above-described problem is that a playback application for playing back the content is recorded on the recording medium on which the content is recorded, and the playback device can play back the content by executing the playback application. In the situation where a recording medium in which the playback application has a function of content resume playback and a recording medium in which the playback application does not have a function of content resume playback are mixed.

  The present invention has been made in view of the above-described problems. Among recording media, a recording medium in which a playback application has a function of content resume playback and a playback application have a function of content resume playback. The present invention provides a recording medium playback apparatus that can execute an optimal method of resume playback or a recording medium playback apparatus that allows a user to select an optimal method of resume playback in a situation where recording media that are not used are mixed. For the purpose.

  In order to solve the above-described conventional problem, a recording medium playback apparatus of the present invention includes a reading unit that reads the content and the playback application from a recording medium storing the content and the playback application for playing back the content, A playback unit capable of executing content resume playback that executes the playback application read by the reading unit to resume playback of the content, and a determination unit that determines whether the playback application has the function of content resume playback It has the composition provided with.

  With this configuration, the determination unit determines whether or not the playback application has a function of content resume playback. Based on the result of the determination, the recording medium playback device can execute the resume playback of the optimum method. Alternatively, the user can select the optimum type of resume reproduction and cause the recording medium reproduction apparatus to execute it.

  Further, the recording medium playback apparatus causes the playback unit to execute the content resume playback by the playback application for the storage medium determined by the determination unit as the playback application having the content resume playback function. You may have the structure further provided with the reproduction | regeneration control part.

  With this configuration, it is possible to perform content resume reproduction for a recording medium having a function of content resume reproduction.

  In the recording medium playback apparatus, the playback unit may be capable of executing simple resume playback that resumes playback of the content without activating the playback application. The playback unit may cause the playback unit to execute the simple resume playback for a storage medium in which the playback application determines that the playback application does not have the content resume playback function.

  With this configuration, the recording medium having the content resume reproduction function can perform the content resume reproduction, and the recording medium not having the content resume reproduction function can perform the simple resume reproduction. Can stop playback halfway without recognizing whether or not the recording medium has the function of content resume playback, and can resume playback from the stop point when resuming. If it has a playback function, playback by a playback application is possible, and the function of the playback application is not sacrificed.

  The recording medium playback apparatus may further include an input receiving unit that receives a user input, and the playback control unit receives a user input for the input receiving unit to give priority to the simple resume playback. In such a case, the playback unit may cause the playback unit to execute the simple resume playback even for the storage medium for which the determination unit determines that the playback application has the content resume playback function.

  With this configuration, when the user determines that it is not necessary to use the function of the playback application, simple resume playback can be performed even if the playback application has a function of content resume playback. In the case of simple resume playback, there is no need to start a playback application, so that resume playback can be performed quickly.

  The recording medium playback apparatus may further include a display control unit that displays a notification that the resume playback is not performed on the storage medium that is determined by the determination unit to have no content resume playback function. Furthermore, you may have the structure provided.

  With this configuration, the user can know that resume playback cannot be performed. At this time, if the recording medium playback device has a simple resume playback function, the simple resume playback function can be performed. If not, playback can be resumed from the beginning as usual without resume playback.

  In the recording medium playback apparatus, the playback unit may be capable of executing simple resume playback that resumes playback of the content without activating the playback application. The playback unit may execute the playback application. Is determined to have the function of content resume playback, the selection of a resume playback method including the content resume playback and the simple resume playback is received from the user. When it is determined that there is no resume playback function, a selection receiving unit that receives a selection of a resume playback method that includes the simple resume playback except the content resume playback is received by the user and the selection receiving unit Resume playback method Therefore, it may further have includes a configuration and a reproduction controller for executing resume reproduction to the reproduction unit.

  With this configuration, it is possible to perform content resume reproduction for a recording medium having a content resume reproduction function, and simple resume reproduction can be performed by a user's selection for a recording medium not having a content resume reproduction function. Therefore, the user can stop playback in the middle of playback without being aware of whether or not the recording medium has the function of content resume playback, and can resume playback from the stop point when restarting. If the recording medium has a content resume playback function, playback by a playback application is possible, and the function of the playback application is not sacrificed. Also, even if the playback application has a content resume playback function, if it is not necessary to use other functions of the playback application, the playback application can be started by selecting simple resume playback. It is possible to quickly resume playback from the stop point.

  The recording medium playback apparatus may further include a storage unit for recording resume information necessary for performing the content resume playback, and the determination unit may store the storage unit in the storage unit using the playback application. When the resume information is written, it may be determined that the playback application has the function of content resume playback.

  With this configuration, it is not necessary for the recording medium playback device to analyze the content of the playback application to determine whether or not the playback application has a content resume function, and the recording medium playback device simply stores resume information. If it is monitored whether or not the content is written to the copy, it can be determined whether or not the playback application has a content resume function.

  In the recording medium playback apparatus, the determination unit may consider that the resume information is written to the storage unit when the time information is written to the storage unit, and the playback application performs the content resume playback. You may judge that it has the function of.

  In order to resume playback, time information is always written in the storage unit as resume information. Therefore, by monitoring whether or not time information is written in the storage unit, it is possible to determine whether or not the playback application has a function of content resume without analyzing the content of the playback application.

  In the recording medium playback apparatus, the determination unit may determine whether or not the time information is written to the storage unit when a playback stop event occurs in which the playback unit stops playback of the content. You can judge.

  With this configuration, since it is determined whether or not the time information is written at the timing when the reproduction stop event occurs, it is possible to reduce the possibility that the time information that is not written as the resume information is erroneously recognized as the resume information.

  In the recording medium playback apparatus, the determination unit determines whether or not the time information is written to the storage unit regardless of the occurrence of a playback stop event in which the playback unit stops playback of the content. You can judge.

  With this configuration, when the time information is written, it is determined that the playback application has the function of content resume playback regardless of the timing. It is possible to reduce the possibility that it is impossible to determine that the resume reproduction function is provided.

  In the recording medium playback device, the recording medium may be recorded with resume function presence / absence information indicating whether or not the playback application has the content resume playback function. The resume function presence / absence information is read from a recording medium, and the determination unit determines whether or not the playback application has the content resume playback function based on the resume function presence / absence information read by the reading unit. You can do it.

  With this configuration, the recording medium playback apparatus can determine whether or not the playback application has the function of content resume playback by a simple process of referring to the resume function presence / absence information recorded on the recording medium.

  In the recording medium playback apparatus, the playback application has a function of notifying the presence / absence of the content resume playback function, and the determination unit notifies the presence / absence of the content resume playback function by the playback application. In response, the playback application may determine whether or not the playback application has the content resume playback function.

  With this configuration, the recording medium playback apparatus can determine whether or not the playback application has a content resume playback function with a simple process of receiving and referencing a notification from the playback application.

  Further, the recording medium playback apparatus includes a storage unit for recording resume information necessary for performing the content resume playback, and the playback control unit causing the playback unit to execute the simple resume playback. A resume information erasure unit that erases the resume information stored in the storage unit may be included.

  The simple resume reproduction is reproduction performed in the same manner as in the HDMV mode without starting the reproduction application when the content is reproduced by a reproduction application. Therefore, when the simple resume reproduction is performed and the reproduction of all the contents is completed, the recording medium reproduction apparatus returns to the normal operation and starts the reproduction application. At this time, if the resume information remains in the storage unit without being erased, the playback application performs content resume playback according to the resume information. Therefore, when executing the simple resume reproduction, the resume information written by the reproduction application can be deleted to prevent the above-described overlapping resume reproduction.

  In addition, the recording medium playback apparatus may further include a storage unit for recording resume information necessary for performing the content resume playback together with information for specifying the recording medium.

  With this configuration, after the reproduction of the content on the first recording medium is stopped, the first storage medium is once taken out from the recording medium reproduction apparatus, and the recording medium reproduction apparatus reproduces another second recording medium. Even when the first recording medium is reproduced again, resume reproduction can be performed.

  In addition, the recording medium reproduction device includes a storage unit for recording resume information necessary for performing the content resume reproduction, and the recording unit when the recording medium is removed from the recording medium reproduction device. And a resume information erasing unit that erases the resume information recorded in the recording medium.

  With this configuration, the resume information recorded in the storage unit is always resume information of the recording medium loaded in the recording medium playback device, and it is not necessary to add information for specifying the recording medium to the resume information.

  Another aspect of the present invention is a recording medium reproduction method, wherein the recording medium reproduction method reads the content and the reproduction application from the recording medium storing the content and the reproduction application for reproducing the content. And a determination step of determining whether or not the playback application has a function of content resume playback for resume playback of the content by the playback application.

  Also with this configuration, the determination step determines whether or not the playback application has a function of content resume playback. Based on the result of the determination, it is possible to execute the optimal mode resume playback, or The user can select the optimum type of resume playback.

  In the recording medium playback method, the playback application read in the reading step is activated for the storage medium determined in the determination step that the playback application has the function of content resume playback. A content resume reproduction step for executing the content resume reproduction may be further included.

  With this configuration, it is possible to perform content resume reproduction for a recording medium having a function of content resume reproduction.

  In the recording medium playback method, the content is resumed without starting the playback application for the storage medium determined in the determination step that the playback application does not have the content resume playback function. A simple resume reproduction step for executing simple resume reproduction may be further included.

  With this configuration, the recording medium having the content resume reproduction function can perform the content resume reproduction, and the recording medium not having the content resume reproduction function can perform the simple resume reproduction. Can stop playback halfway without recognizing whether or not the recording medium has the function of content resume playback, and can resume playback from the stop point when resuming. If it has a playback function, playback by a playback application is possible, and the function of the playback application is not sacrificed.

  In the recording medium playback method described above, a first selection for accepting a selection of a resume playback mode including the content resume playback from a user when the playback application determines in the determining step that the content resume playback has a function. And a second selection receiving step of receiving from the user a selection of a resume playback method other than the content resume playback when the playback application determines in the determination step that the playback application does not have the function of content resume playback. And a playback control step of executing resume playback according to the resume playback method received in the first selection receiving step or the second selection receiving step.

  Even with this configuration, it is possible to perform content resume reproduction for a recording medium having a function of content resume reproduction, and simple resume reproduction can be performed for a recording medium not having a function of content resume reproduction. The user can stop playback in the middle of playback without being aware of whether or not the recording medium has a content resume playback function, and can resume playback from the stop point when restarting. If the content resume playback function is provided, playback by the playback application becomes possible, and the function of the playback application is not sacrificed.

  Another aspect of the present invention is a computer program, which causes a computer to execute any one of the recording medium playback methods described above.

  According to the present invention, since it is determined whether or not the playback application has a function of content resume playback, based on the result of the determination, the recording medium playback device can execute the resume playback of the optimum method, Alternatively, the user can select the optimum type of resume reproduction and cause the recording medium reproduction apparatus to execute it.

The block diagram which shows the structure of the optical disk reproducing | regenerating apparatus in embodiment of this invention The figure which shows the structure of AV system containing the optical disk reproducing | regenerating apparatus in embodiment of this invention The figure which shows the structure of BD-ROM in embodiment of this invention In the embodiment of the present invention, index. The figure which shows the relationship between the bdmv file and the title The flowchart which shows operation | movement of the signal processing part at the time of the reproduction | regeneration cancellation | release event in embodiment of this invention The flowchart which shows operation | movement of the signal processing part at the time of reproduction | regeneration restart of the application example 1 in embodiment of this invention The flowchart which shows operation | movement of the signal processing part at the time of reproduction | regeneration restart of the application example 2 in embodiment of this invention The flowchart which shows operation | movement of the signal processing part at the time of reproduction | regeneration restart of the modification of the application example 2 in embodiment of this invention The flowchart which shows operation | movement of the signal processing part at the time of reproduction | regeneration restart of the application example 3 in embodiment of this invention The figure which shows the example of a display of the selection screen which can select content resume reproduction | regeneration in embodiment of this invention The figure which shows the example of a display of the selection screen which cannot select content resume reproduction | regeneration in embodiment of this invention The flowchart which shows operation | movement of the signal processing part at the time of reproduction | regeneration restart of the modification of the application example 3 in embodiment of this invention

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In the following, the recording medium is an optical disk, specifically, a BD-ROM in which data of AV (Audio-Visual) content such as a movie work or music live video is recorded, and the recording medium playback device stores the BD-ROM. An example of a reproducible optical disc playback apparatus will be described.

  FIG. 1 is a block diagram showing a configuration of a playback apparatus according to the present embodiment, and FIG. 2 is a diagram showing a configuration of an AV system including the optical disc playback apparatus of the present embodiment. First, with reference to FIG. 2, the configuration of an AV system including the optical disc playback apparatus of the present embodiment will be described. The AV system 1 is configured to include an BD-ROM 10, a removable medium 42, a monitor 43, a WWW server 44, and a remote controller 45 in addition to an optical disk playback device (hereinafter simply referred to as “playback device”) 100.

  The monitor 43 is a device that is connected to the playback device 100 and outputs playback video. The monitor 43 includes a display and a speaker, and outputs video and audio. The monitor 43 also displays an operation menu such as a pop-up menu and a user interface for the user.

  The remote controller 45 is a device for the user to remotely operate the playback device 100. When the user inputs various operations to the remote controller 45, the remote controller 45 transmits an input signal to the playback apparatus 100 using infrared rays. Therefore, the user can visually operate the disc playback apparatus 100 using the remote controller 45. A touch panel 46 may be attached on the display screen of the monitor 43 so that the user can operate it.

  The playback device 100 can read the BD-ROM 10 and play back the content recorded there. The playback device 10 can also play back the content recorded there by reading the data recorded on the removable medium 42. The user can play back the content recorded on the BD-ROM 10 or the removable medium 42 by operating buttons on the remote controller 45 or the playback device 100.

  Further, the playback device 100 is connected to the WWW server 44 via the Internet, and can download various data from the WWW server 44.

  FIG. 1 is a block diagram showing the configuration of the playback apparatus 100 according to the present embodiment. FIG. 1 also shows a BD-ROM. Hereinafter, the configuration of the optical disc playback apparatus 100 and the BD-ROM 10 will be described with reference to FIG.

  The playback device 100 includes a pickup 11, a servo 12, a local storage 13, a network interface 14, and a signal processing unit 15.

  The pickup 11 obtains desired data from the BD-ROM 10 and outputs the data to the signal processing unit 15. The servo 12 controls the pickup 11. The servo 12 moves (seeks) the pickup 11 in the radial direction of the recording medium and adjusts the movement (focus) in the axial direction of the recording medium. The pickup 11 corresponds to the reading unit of the present invention.

  The local storage 13 is a non-volatile memory for storing information necessary for content resume reproduction (hereinafter referred to as “resume information”). Information is written to, read from, and deleted from the local storage 13 by the signal processing unit 15. The local storage 13 corresponds to the storage unit of the present invention. The network interface 14 downloads data from the WWW server 44 on the network.

  The signal processing unit 15 processes data output from the pickup 11, data stored in the local storage 13, and data downloaded from the WWW server 44 through the network interface 14. The signal processing unit 15 processes these data and outputs the processed data to the monitor 43 to reproduce the AV content recorded on the BD-ROM 10. The signal processing unit 15 is realized by the arithmetic processing device executing a predetermined computer program.

  In addition, the signal processing unit 15 receives a user operation input from the remote controller 45, determines whether or not the operation can be received, and performs a process corresponding to the operation input when the operation can be received. The signal processing unit 15 further has a function of displaying on the monitor 43 a user interface built in the playback apparatus 100 from the beginning.

  The signal processing unit 15 includes a BD-J application execution unit 151, a simple playback unit 152, a data processing unit 153, a process determination unit 154, a playback control unit 155, a display control unit 156, and a user operation reception unit 157.

  The BD-J application execution unit 151 executes a BD-J application recorded on the BD-ROM 10 and read by the pickup 11. When the BD-J application has a content resume playback function, the BD-J application execution unit 151 performs content resume playback according to the function.

  The simple playback unit 152 plays back the content of the BD-ROM 10 read by the pickup 11 without executing the BD-J application. The simple playback unit 152 performs simple resume playback when performing resume playback. In the simple resume reproduction, the simple reproduction unit 152 resumes reproduction from the stop point based on the record of the stop point recorded in the local storage 13 without using the BD-J application.

  The BD-J application execution unit 151 and the simple playback unit 152 are connected to the monitor 43 and cause the monitor 43 to output content. The BD-J application execution unit 151 and the simple playback unit 152 correspond to the playback unit of the present invention.

  The data processing unit 153 writes, reads, and erases data with respect to the local storage 13. When the BD-J application is being executed by the BD-J application execution unit 151, the data processing unit 153 writes, reads, or erases necessary data to / from the local storage 13 according to the BD-J application. To do. The data processing unit 153 also writes, reads, and erases data with respect to the local storage 13 based on control by the reproduction control unit 155.

  The processing determination unit 154 determines the processing content of the data processing unit 153. Specifically, the process determination unit 154 identifies the content of data when the data processing unit 153 writes data to or reads data from the local storage 13. The process determining unit 154 determines whether or not time information has been written to the local storage 13 by the data processing unit 153, particularly when the BD-J application is being executed.

  The reproduction control unit 155 activates the BD-J application by the BD-J application execution unit 151 to reproduce the content, or reproduces the content without activating the BD-J matching application in the simple reproduction unit 152. The BD-J application execution unit 151 or the simple playback unit 152 is controlled according to the determination. Further, the reproduction control unit 155 controls the data processing unit 153 to cause the data processing unit 153 to write, read, and erase data with respect to the local storage 13.

  The display control unit 156 is connected to the monitor 43 and causes the monitor 43 to perform a predetermined display such as a user interface based on the control of the reproduction control unit 155. The user operation receiving unit 157 receives a user operation input from the remote controller 45 and outputs the signal to the reproduction control unit 155. Note that the user operation accepting unit 157 may receive a user operation input from a button provided on the playback device 100 or the touch panel 46, or may receive an operation input from a device connected to the playback device 100. The reproduction control unit 155 performs control based on the user operation input received by the user operation reception unit 157. The user operation unit 157 corresponds to the input reception unit and the selection reception unit of the present invention.

  Next, the BD-ROM 10 will be described. FIG. 3 is a diagram showing the configuration of the BD-ROM 10. As described above, AV (Audio-Visual) content data such as a movie work or music live video is recorded in the BD-ROM 10.

  The BD-ROM 10 has a recording area that spirals from the inner periphery to the outer periphery, as in other optical discs such as a DVD (Digital Versatile Disc) and a CD (Compact Disc). It has a logical address space in which logical data can be recorded during the outer lead-out. Further, inside the lead-in, there is a special area called BCA (Burst Cutting Area) that can be read only by the drive. Since this area cannot be read from an application, it is used for copyright protection technology, for example.

  In the logical address space, application data such as video data is recorded with file system information (volume) at the head. The file system is UDF, ISO9660, or the like, and logical data recorded in the same way as a normal PC can be read out using a directory and file structure. A file name of 255 characters, It is possible to read the directory name.

  The directory and file structure on the disc of the BD-ROM 10 is as follows. Directly under the root directory (ROOT), the BDMV directory and bd. A cert file is placed. The BDMV directory is a directory in which data such as AV contents and management information handled by the BD-ROM 10 are recorded. bd. cert (fixed file name) is a certificate used for signature verification when the content added for the virtual package is merged with the data on the BD-ROM 10.

  Under the BDMV directory, there are five subdirectories called PLAYLIST directory, CLIPINF directory, STREAM directory, BDJO directory, and JAR directory. The BDMV directory includes an index. bdmv, MovieObject. Two types of bdmv files are arranged.

  Here, the index. The bdmv (file name fixed) will be described. index. bdmv is management information relating to the entire BD-ROM 10, and is an organization ID (32 bits) that is an identifier that identifies a provider of movie works, a disc ID (128 bits) that is an identifier assigned to each BD-ROM 10 provided by the provider, and the like. After inserting the disc into the playback apparatus 100, the index. By reading bdmv first, the playback apparatus 100 uniquely recognizes the disc. In addition, index. bdmv includes a table in which a plurality of titles that can be reproduced on the BD-ROM 10 and BD-J objects that define individual titles are associated with each other.

  Next, a file with the extension “bdjo” will be described. A file with the extension “bdjo” is a file storing a BD-J object. The BD-J object is information that defines a title by associating an AV stream indicated by PlayList information with an application. The BD-J object indicates an application management table (AMT) and a PlayList list that can be reproduced in the title.

  The application management table is a table that realizes application signaling. Application signaling refers to control that manages the title in the BD-ROM 10 as an application life cycle and manages the activation and termination of the application. Here, the life interval indicates a time interval in which the application can live on the heap memory of the virtual machine on the time axis of the entire content recorded in the BD-ROM 10. “Survival” means a state in which the application is read into the heap memory and can be executed by the virtual machine.

  The application management table shows an application having this title as a life cycle by listing the identifier (application ID) of the application and the ID of a Java (registered trademark) archive file belonging to the application. That is, one application is composed of one or more Java (registered trademark) archive files.

  A Java (registered trademark) application whose sector is managed by the application management table in the BD-J object in this way is referred to as a “BD-J application”. The BD-J application corresponds to the playback application of the present invention.

  FIG. 4 shows an index. It is a figure which shows the relationship between a bdmv file and a title. A title is a playback unit that combines an application and an AV stream. The bdmv file describes the title structure on the disc, and refers to each title on the disc and the corresponding application (BD-J application for the BD-J mode title, scenario program for the HDMV mode title). I manage the relationship.

  Further, “First Playback” and “TopMenu” exist as special titles. “First Playback” is a title that is automatically played back first when the BD is activated. It is mainly used for BD usage agreement display. “TopMenu” is played when a menu key on the remote controller is pressed or when title playback is finished, and is mainly used for selecting a title and selecting a subtitle / audio language.

  Next, processing when playback is stopped while the content of the BD-ROM 10 is being played back will be described. A situation in which playback is canceled while content is being played is a situation in which a playback stop event occurs. In the playback stop event, stop of playback is instructed, and power off is instructed during playback. Playback when a transition to a menu title is instructed during playback, when the BD-ROM 10 is removed from the playback device 100 during playback or pause, or when a predetermined time has elapsed in the pause state For example, the device 100 may enter a sleep state.

  When the BD-J application has a function of content resume playback, when a playback stop event occurs, the BD-J application instructs the data processing unit 153 to write the content resume information to the local storage 13. To do. Here, as described above, the playback apparatus 100 cannot directly determine whether or not the BD-J application has a content resume playback function. However, when the BD-J application performs content resume reproduction, information for specifying the position where the reproduction was stopped when the reproduction stop event occurred is necessary.

  If there is information on the title number, it can be played back from the beginning of the title during resume playback. If there is a chapter number in addition to the title number, it can be reproduced from the beginning of the chapter of the title, but cannot be reproduced from the same position as before the reproduction was stopped. In order to resume playback from the exact same position as before the stop of playback, it is considered that time information is required. In other words, resume playback cannot be performed without time information.

  Therefore, in this embodiment, attention is paid to the fact that time information is always required for resume reproduction, and time information is written in the local storage 13 to the data processing unit 153 by the BD-J application. It is determined whether or not it is instructed to do so. That is, when the data processing unit 153 writes time information to the local storage 13, it is determined that the resume information is written to the local storage 13, and the BD-J application determines that the content resume playback function is provided. This determination is performed by the processing determination unit 154 monitoring the processing of the data processing unit 153.

  FIG. 5 is a flowchart showing the operation of the signal processing unit 15 when a playback stop event occurs. When a playback stop event occurs (step S51), the process determination unit 154 determines whether or not there is time information in the write information that the data processing unit 153 is about to write to the local storage 13 (step S52). . When there is time information (YES in step S52), the process determining unit 154 causes the data processing unit 153 to record that the local storage 13 has the content resume playback function as the resume state (step S53). ).

  Then, the data processing unit 153 writes the write information instructed by the BD-J application to the local storage 13 (Step S54). As a result of the determination by the process determination unit 154, if it is determined that there is no time information in the write information, the data processing unit 153 directly writes the write information instructed by the BD-J application to the local storage 13 ( Step S54).

  If a playback stop event occurs, the playback control unit 155 also instructs the data processing unit 153 to write time information, audio number information, subtitle number information, etc. as simple resume information. To do. In addition to the instruction from the BD-J application, the data processing unit 153 receives a playback stop event at an address different from the address at which the time information is written by the BD-J application in accordance with the instruction from the playback control unit 155. Write simple resume information.

  As described above, the playback control unit 155 cannot directly determine whether or not the BD-J application has a function of content resume playback. If it does not have a function, it is possible to perform simple resume reproduction using the simple resume information written by the reproduction control unit 155, and the BD-J application has a function of content resume reproduction. This is because the simple resume reproduction can be performed when the user desires the simple resume reproduction.

  Note that the reproduction control unit 155 instructs the data processing unit 153 to write the simple resume information to the local storage 13 only when it is determined that there is no time information in the write information as a result of the determination by the process determining unit 154. You may instruct.

  In addition, when a playback stop event occurs, the playback control unit 155 does not need to instruct the data processing unit 153 to write simple resume information separately from the BD-J application. In this case, if the BD-J application has a content resume playback function, the content resume playback is possible. If the BD-J application does not have a content resume playback function, the playback is stopped. Resume playback at the specified position will not be performed. Even in the latter case, when playback is stopped, if the BD-J application stores the title or chapter information at that time in the local storage 13, playback from the title or chapter can be resumed. It becomes.

  It should be noted that when the playback stop situation occurs, the playback control unit 155 does not instruct the data processing unit 153 to write the simple resume information separately from the BD-J application, and FIG. If it is determined in step S52 of the flow that time information has not been written, the playback control unit 155 controls the display control unit 156 to resume to the monitor 43 when a playback stop event occurs. The user may be alerted with a display notifying that playback is not performed.

  With this alerting, the user can operate the playback apparatus 100 to resume playback from the playback position by himself / herself when the playback is restarted by storing the current playback position. . Further, the user may be inquired again about whether or not to stop the reproduction together with the alert, and the reproduction may be stopped when an operation input for stopping the reproduction is further received from the user in response to the inquiry.

  Further, information specifying the BD-ROM 10 may be added to the above-described content resume information and simple resume information. By adding information specifying the BD-ROM 10, resume playback can be performed on the BD-ROM 10 even when the BD-ROM 10 is taken out of the playback device 100 and inserted into the playback device 100 again. it can.

  Further, the information for specifying the BD-ROM 10 may not be added to the content resume information and the simple resume information. In this case, when the BD-ROM 10 is taken out from the playback device 100, the playback control unit 155 instructs the data processing unit 153 to delete the content resume information and the simple resume information from the local storage 13. At this time, the data processing unit 153 functions as a resume information erasing unit of the present invention.

  As described above, when the information for specifying the BD-ROM 10 is not added to the content resume information and the simple resume information, the content resume information and the simple resume information are deleted from the local storage 13 when the BD-ROM 10 is taken out from the playback device 100. By doing so, it is possible to prevent resume playback from being performed on the BD-ROM 10 newly loaded in the playback device 100 in accordance with the resume information of another BD-ROM 10.

  As described above, the playback apparatus 100 according to the present embodiment determines whether or not the data processing unit 153 writes time information to the local storage 13 in accordance with an instruction from the BD-J application when a playback stop event occurs. Then, it is determined whether or not the BD-J application has a function of content resume reproduction. At the time of reproduction, this judgment result can be applied to perform optimum reproduction. This judgment result has a plurality of application examples. Hereinafter, it demonstrates in order.

(Application example 1: Example of notifying the presence / absence of a content resume playback function)
FIG. 6 is a flowchart at the time of resuming reproduction according to the first application example. Application example 1 is a type of playback apparatus 100 in which the playback control unit 155 does not allow the data processing unit 153 to record simple resume information when a playback stop event occurs, that is, does not have a function of simple resume playback, or This is an application example in the playback apparatus 100 in which the simple resume playback function is disabled. In this case, if content resume playback cannot be performed, resume playback cannot be performed.

  When the playback control unit 155 receives a playback instruction from the user operation receiving unit 157 with the BD-ROM 10 loaded, the playback control unit 155 refers to the local storage 13 and determines whether or not the BD-ROM 10 has a function of content resume playback. Is determined (step S61). If there is no information indicating that the content resume playback function is available (NO in step S61), playback control unit 155 controls display control unit 156 to start playback on monitor 43 from the beginning of the disc. Display to notify that the playback is not performed or the resume playback is not performed (step S62).

  If there is information in the local storage 13 indicating that the BD-ROM 10 has a content resume playback function (YES in step S61), the playback control unit 155 sends a BD-J to the BD-J application execution unit 151. When the J application is activated and the local storage 13 does not have information indicating that the BD-ROM 10 has the function of content resume reproduction, the BD-J application execution unit 151 is displayed as described above. Activates the BD-J application (step S63).

  In step S63, if the BD-ROM 10 has a content resume playback function, the BD-J application performs content resume playback. If the BD-ROM 10 does not have a content resume playback function, the BD-ROM 10 Even if the J application is executed, the content resume reproduction is not performed.

(Application example 2: Example of simple resume playback when there is no content resume playback function)
FIG. 7 is a flowchart when reproduction is resumed according to the application example 2. The application example 2 has a playback device 100 of a type in which the playback control unit 155 causes the data processing unit 153 to record simple resume information when a playback stop situation occurs, that is, an effective simple resume playback function. This is an application example in the playback apparatus 100. In this case, simple resume playback can be performed even when content resume playback is not possible.

  When the playback control unit 155 receives a playback instruction from the user operation receiving unit 157 with the BD-ROM 10 loaded, the playback control unit 155 refers to the local storage 13 and determines whether or not the BD-ROM 10 has a function of content resume playback. Is determined (step S71). If there is information indicating that there is a content resume playback function (YES in step S71), playback control unit 155 causes BD-J application execution unit 151 to start the BD-J application. As a result, the BD-J application performs content resume reproduction (step S72).

  If there is no information indicating that the content resume playback function is available (NO in step S71), the playback control unit 155 does not start the BD-J application in the BD-J application execution unit 151 and performs simple playback. The unit 152 causes the resume reproduction. The simple playback unit 152 performs simple resume playback using the simple resume information saved in the local storage 13 (step S73).

  As a modified example of the application example 2, when there is no information indicating that there is a function of content resume playback, the user performs simple resume playback without starting the BD-J application, or BD without performing resume playback. -You may ask whether normal playback is performed by the J application.

  FIG. 8 is a flowchart of this modification. In FIG. 8, the same processing as that in FIG. If there is no information indicating that the local storage 13 has the function of content resume reproduction in step S71 (NO in step S71), the user is asked to select whether or not to perform simple resume reproduction (step S84).

  At this time, the reproduction control unit 155 controls the display control unit 156 to cause the monitor 43 to display for selecting whether or not to perform simple resume reproduction. The user can select whether or not to perform simple resume reproduction by operating the remote controller. The selection operation input is received by the user operation reception unit 157 and output to the reproduction control unit 155. At this time, the user operation reception unit 157 functions as a selection reception unit of the present invention.

  When simple resume playback is selected by the user (YES in step S84), playback control unit 155 causes simple playback unit 152 to perform simple resume playback (step S73). When normal playback is selected by the user (NO in step S84), playback control unit 155 causes BD-J application execution unit 151 to start the BD-J application. In this case, since the BD-J application does not have a content resume playback function, normal playback is performed (step S85).

  As described above, according to the application example 2, when the BD-J application has the function of content resume reproduction, the content resume reproduction can be performed, and the BD-J application has the function of content resume reproduction. If not, simple resume playback can be performed, so that the user can stop playback halfway without recognizing whether or not the BD-ROM 10 has the function of content resume playback. Resume playback can be performed from the stop point. At this time, if the BD-ROM 10 has the function of content resume playback, playback by the BD-J application is possible, and the function of the BD-J application is sacrificed. There is no.

(Application example 3: Example in which the user selects the resume playback method)
In application example 1 and application example 2, when the BD-J application has a function of content resume reproduction, the BD-J application is automatically activated to perform content resume reproduction. In the application example 3, even when the BD-J application has a function of content resume reproduction, the user can select the simple resume reproduction or the normal reproduction in which the BD-J application is activated but the content resume reproduction is not performed.

  FIG. 9 is a flowchart when reproduction is resumed according to the application example 3. When the playback control unit 155 receives a playback instruction from the user operation receiving unit 157 with the BD-ROM 10 loaded, the playback control unit 155 refers to the local storage 13 and determines whether or not the BD-ROM 10 has a function of content resume playback. Is determined (step S91). Then, the playback control unit 155 controls the display control unit 156 to cause the monitor 43 to display the screen for selecting the resume playback mode, thereby causing the user to select the resume playback mode (step S92).

  The user can perform a selection operation for selecting one of the resume reproductions by operating the remote controller 45. The selection operation input is received by the user operation reception unit 157 and output to the reproduction control unit 155. At this time, the user operation reception unit 157 functions as a selection reception unit of the present invention.

  When the user selects the resume playback method in step S92, if it is determined in step S91 that the BD-ROM 10 has the function of content resume playback, including the content resume playback, A resume playback method including normal playback (without resume playback) is presented to the user in a selectable manner, and one of them is selected.

  FIG. 10 is a display example of the selection screen in this case. On this selection screen, the user can select a resume playback method by instructing any one of the content resume playback button, the simple resume playback button, and the normal playback button.

  On the other hand, when the user selects the resume playback method in step S92, if it is determined in step S91 that the BD-ROM 10 does not have the content resume playback function, the resume playback method except for the content resume playback is used. In other words, the user can select either simple resume playback or normal playback (without resume playback) and select one of them.

  FIG. 11 is a display example of the selection screen in this case. In this selection screen, buttons for content resume reproduction, simple resume reproduction, and normal reproduction are displayed, but content resume reproduction cannot be selected. Specifically, the cursor may not be moved to the content resume playback button, or a warning that content resume playback cannot be performed may be displayed when the content resume playback button is instructed.

  When the user selects content resume reproduction in step S92, the reproduction control unit 155 causes the BD-J application execution unit 151 to activate the BD-J application. The BD-J application performs content resume reproduction based on the content resume information stored in the local storage 13 (step S93).

  When the user selects simple resume reproduction in step S92, the reproduction control unit 155 causes the simple reproduction unit 152 to perform simple resume reproduction (step S94). In this case, when the simple resume reproduction is performed even though the content resume information is stored in the local storage 13, the data processing unit 153 erases the content resume information stored in the local storage 13. (Step S96). At this time, the data processing unit 153 functions as a resume information erasing unit of the present invention.

  As described above, the content resume information is deleted when the simple resume reproduction is performed even though the content resume information is stored in the local storage 13 for the following reason. That is, when the simple resume reproduction is completed, the reproduction control unit 155 causes the BD-J application execution unit 151 to start the BD-J application as usual. At this time, if the content resume information remains, the BD-J application performs content resume reproduction according to the content resume information. That is, resume reproduction is continuously performed from the same position. Therefore, in the case where simple resume reproduction is performed even though the content resume information is stored in the local storage 13, such continuous resume reproduction is avoided by erasing the content resume information from the local storage 13. .

  When the user selects normal playback in step S92, the playback control unit 155 instructs the data processing unit 153 to delete the content resume information stored in the local storage 13, and then execute the BD-J application. The unit 151 starts the BD-J application. When the BD-J application execution unit 151 starts the BD-J application, the content resume information in the local storage 13 has already been erased at this time, so that the BD-J application does not perform content resume playback as usual. Is performed (step S95).

  As described above, also in the application example 3, as in the application example 2, when the BD-J application has a function of content resume reproduction, the content resume reproduction can be performed and the BD-J application can execute the content resume reproduction. When the playback function is not provided, simple resume playback can be performed.

  Further, according to the application example 3, even when the BD-J application has a function of content resume reproduction, the simple resume reproduction can be selected. In the simple resume reproduction, there is no need to start the BD-J application, and there is an advantage that the reproduction can be resumed promptly from the previous reproduction stop position. Furthermore, according to the application example 3, even when the BD-J application has a function of content resume reproduction, it is possible to select normal reproduction that does not perform content resume reproduction.

  In the description of the application example 3, the description has been made on the assumption that the playback device 100 has a function of simple resume playback. Below, the case where the reproducing | regenerating apparatus 100 does not have a function of simple resume reproduction | regeneration is demonstrated as a modification of the application example 3. FIG.

  FIG. 12 is a flowchart of this modification. When a playback instruction is received from the user operation receiving unit 157 with the BD-ROM 10 loaded, the local storage 13 is referred to and it is determined whether or not the BD-ROM 10 has a function for content resume playback (step). S121). If there is no information indicating that the local storage 13 has the function of content resume reproduction (NO in step S121), the reproduction control unit 155 causes the BD-J application execution unit 151 to activate the BD-J application. At this time, since there is no content resume information, the BD-J application performs normal reproduction without performing content resume reproduction (step S123).

  If there is information indicating that the local storage 13 has the function of content resume reproduction in step S121 (YES in step S121), the user is allowed to select whether or not to resume the content (step S122). If the user has not selected to perform content resume playback (NO in step S122), playback control unit 155 causes data processing unit 153 to delete the content resume information stored in local storage 13 Then, the BD-J application execution unit 151 starts the BD-J application.

  When the BD-J application execution unit 151 starts the BD-J application, the content resume information in the local storage 13 has already been erased at this time, so the BD-J application performs normal playback without performing content resume playback. (Step S123).

  If the user selects to resume the content (YES in step S122), playback control unit 155 causes BD-J application execution unit 151 to start the BD-J application. At this time, the BD-J application performs content resume reproduction based on the content resume information stored in the local storage 13 (step S124).

  As described above, according to the modification of the application example 3, the normal reproduction can be selected even when the BD-J application has the function of content resume reproduction.

  As described above, according to the embodiment of the present invention, the process determination unit 154 determines whether or not the BD-J application has a function of content resume playback. Based on the result of the determination, the playback device 100 is capable of executing an optimal method of resume playback. Alternatively, since the process determination unit 154 determines whether or not the BD-J application has a function of content resume reproduction, the user can select the optimum method of resume reproduction and cause the reproduction apparatus 100 to execute it.

  If the playback apparatus 100 does not have the processing determination unit 154 and does not determine whether the BD-J application has a function of content resume playback, the content resume playback is possible for the content that can be resumed. If it is going to perform, the reproducing | regenerating apparatus 100 will start and reproduce | regenerate BD-J application about all BD-ROM. Then, when the BD-J application does not have a content resume playback function, resume playback is not performed. Therefore, if the resume reproduction is surely performed for all the BD-ROMs, the simple resume reproduction must be performed for all the BD-ROMs without starting the BD-J application.

  On the other hand, in the playback apparatus 100 of the above-described embodiment, it is determined whether or not content resume playback is possible for the loaded BD-ROM 10, and content resume playback is performed based on the determination result. If it is possible, the BD-J application is started, and if it is not possible, simple resume reproduction can be performed. As described above, the simple resume reproduction may be performed based on the user instruction even when the content resume reproduction is possible.

  In the above-described embodiment, the process determination unit 154 monitors the process of the data processing unit 153. In particular, whether or not the data processing unit 153 writes time information to the local storage 13 when a playback stop event occurs. Thus, it is determined whether or not the BD-J application stores the content resume information in the local storage 13, that is, whether or not the BD-J application has a function of content resume reproduction. However, the method of determining the presence / absence of the content resume playback function is not limited to this.

  For example, the BD-J application may have a function of notifying the playback device 100 that content resume playback is to be performed. In this case, the data processing unit 153 stores information indicating that the BD-ROM 10 has a function of content resume reproduction in the local storage 13 in accordance with such a notification function of the BD-J application.

  In addition, information indicating that content resume reproduction may be performed may be recorded in the BD-ROM 10. In this case, the pickup 11 reads information indicating that the content resume reproduction is performed from the BD-ROM 10 in accordance with the instruction of the reproduction control unit 155, and the data processing unit 153 performs the operation in accordance with the instruction of the reproduction control unit 155. Information indicating that content resume reproduction is to be performed is stored in the local storage 13. In addition, information indicating that content resume playback read from the BD-ROM 10 is to be stored in the processing determination unit 154, and content resume playback can be performed based on the information when necessary, or content resume playback is possible. You may recognize that there is.

  In the above embodiment, the process determination unit 154 determines whether or not the data processing unit 153 has recorded time information in the local storage 13 when a playback stop event occurs. The unit 154 always monitors the processing of the data processing unit 153 regardless of the presence or absence of the playback stop event, and when the data processing unit 153 writes the time information to the local storage 13, it uses the content resume information. Assuming that there is, the local storage 13 may be written with information indicating that the BD-ROM 10 has a content resume playback function.

  Further, in the above embodiment, when the data processing unit 153 writes time information to the local storage 13, the process determining unit 154 regards it as content resume information, and stores it in the local storage 13 with the BD- Although information indicating that the ROM 10 has the function of content resume playback is written, the information indicating that the ROM 10 has the function of content resume playback may not be stored in the playback device. If information indicating that the content resume playback function is not stored in the playback device, it is checked whether or not time information is stored in the local storage 13 before starting playback, and the time information is stored. If it is, the content resume information may be regarded as content resume information, or it may be recognized that content resume playback is possible.

  As described above, according to the present invention, the recording medium reproducing apparatus can execute the optimum method of resume reproduction, or the user can select the optimum method of resume reproduction and cause the recording medium reproducing device to execute it. And is useful as a recording medium reproducing apparatus for reproducing data recorded on a recording medium such as a BD-ROM.

10 BD-ROM
DESCRIPTION OF SYMBOLS 11 Pickup 12 Servo 13 Local storage 14 Network interface 15 Signal processing part 151 BD-J application execution part 152 Simple reproduction part 153 Data processing part 154 Process judgment part 155 Playback control part 156 Display control part 157 User operation reception part 42 Removable media 43 Monitor 44 WWW server 45 Remote control

Claims (20)

A reading unit that reads the content and the reproduction application from a recording medium storing the content and the reproduction application for reproducing the content;
A playback unit capable of executing content resume playback for executing the playback application read by the reading unit to resume playback of the content;
A determination unit that determines whether or not the playback application has the function of content resume playback;
A recording medium reproducing apparatus comprising:   The playback unit further includes a playback control unit that causes the playback unit to execute the content resume playback by the playback application for the storage medium that is determined by the determination unit to have the playback function of the playback application. The recording medium reproducing apparatus according to claim 1. The playback unit can further execute simple resume playback to resume playback of the content without activating the playback application,
The playback control unit causes the playback unit to execute the simple resume playback for a storage medium that is determined by the determining unit that the playback application does not have the content resume playback function. 3. A recording medium reproducing apparatus according to 2. An input receiving unit for receiving user input;
When the input receiving unit receives a user input for giving priority to the simple resume playback, the playback control unit determines that the playback application has the function of content resume playback when the determination unit receives the input. The recording medium playback apparatus according to claim 3, wherein the playback unit is also configured to execute the simple resume playback for a storage medium.   The display control unit, further comprising: a display control unit configured to display a notification indicating that the playback application is not to be resumed for the storage medium determined by the determination unit that the playback application does not have the content resume playback function. 3. A recording medium playback device according to 1 or 2. The playback unit can further execute simple resume playback to resume playback of the content without activating the playback application,
When the determination unit determines that the reproduction application has the function of content resume reproduction, the determination unit accepts selection of a resume reproduction method including the content resume reproduction and the simple resume reproduction from the user, and the determination unit A selection accepting unit that accepts selection of a resume reproduction method including the simple resume reproduction except the content resume reproduction from the user when it is determined that the reproduction application does not have the function of content resume reproduction;
A playback control unit that causes the playback unit to execute resume playback according to the resume playback method received by the selection receiving unit;
The recording medium reproducing apparatus according to claim 1, further comprising: A storage unit for recording resume information necessary for performing the content resume reproduction;
The determination unit, when the resume information is written in the storage unit by the reproduction application, determines that the reproduction application has a function of the content resume reproduction. The recording medium reproducing device according to any one of claims.   When the time information is written in the storage unit, the determination unit considers that the resume information is written in the storage unit, and determines that the playback application has the content resume playback function. The recording medium reproducing apparatus according to claim 7.   9. The determination unit according to claim 8, wherein when the reproduction stop event for stopping the reproduction of the content by the reproduction unit occurs, the determination unit determines whether or not the time information is written in the storage unit. 2. A recording medium reproducing device according to 1.   9. The determination unit according to claim 8, wherein the determination unit determines whether or not the time information is written in the storage unit regardless of occurrence of a reproduction stop event in which the reproduction unit stops reproduction of the content. 2. A recording medium reproducing device according to 1. Resume function presence / absence information indicating whether or not the playback application has the content resume playback function is recorded on the recording medium,
The reading unit reads the resume function presence / absence information from the recording medium,
The determination unit, based on the resume function presence / absence information read by the reading unit, determines whether the reproduction application has the content resume reproduction function. Item 7. The recording medium playback device according to any one of items 6 to 6. The playback application has a function of notifying the presence / absence of the content resume playback function,
The determination unit receives notification of the presence / absence of the content resume playback function from the playback application, and determines whether the playback application has the content resume playback function based on the notification. The recording medium reproducing apparatus according to any one of claims 1 to 6. A storage unit for recording resume information necessary to perform the content resume reproduction;
A resume information erasure unit for erasing the resume information stored in the storage unit when the reproduction control unit causes the reproduction unit to execute the simple resume reproduction;
The recording medium reproducing apparatus according to claim 1, further comprising:   7. The storage unit according to claim 1, further comprising a storage unit for recording resume information necessary for performing the content resume reproduction together with information for specifying the recording medium. The recording medium reproducing device described. A storage unit for recording resume information necessary to perform the content resume reproduction;
A resume information erasing unit for erasing the resume information recorded in the recording unit when the recording medium is removed from the recording medium reproducing device;
The recording medium reproducing apparatus according to claim 1, further comprising: A step of reading the content and the reproduction application from a recording medium storing the content and a reproduction application for reproducing the content;
A determination step of determining whether or not the playback application has a function of content resume playback to resume playback of the content by the playback application;
A recording medium playback method comprising:   Content resume playback for starting the playback application read in the reading step and executing the content resume playback for the storage medium determined in the determining step that the playback application has the function of content resume playback The method of claim 16, further comprising a step.   Simple resume reproduction step of executing simple resume reproduction for resuming reproduction of the content without activating the reproduction application for the storage medium for which the reproduction application is determined not to have the function of content resume reproduction in the determination step The recording medium reproduction method according to claim 17, further comprising: A first selection receiving step of receiving a selection of a resume playback method including the content resume playback from the user when the playback application determines that the playback application has a function of the content resume playback in the determining step;
A second selection receiving step of receiving, from the user, selection of a resume playback method other than the content resume playback when it is determined in the determining step that the playback application does not have the function of content resume playback;
A reproduction control step for executing resume reproduction in accordance with the resume reproduction method accepted in the first selection acceptance step or the second selection acceptance step;
The recording medium reproduction method according to claim 16, further comprising:   A computer program for causing a computer to execute the recording medium reproduction method according to any one of claims 16 to 19.

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