JP2010123206A - Reproduction apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently store undecodable and unreproducible encoded data CD, in case they become decodable and reproducible later. <P>SOLUTION: When a data acquiring means 41 acquires encoded data CD, the encoded data CD are stored in a decodable group EF and an undecodable group DF by a data discriminating means 42. As a result, it is possible to prevent an apparatus error caused when a reproduction means 43 erroneously decodes the undecodable coded data CD. Moreover, the encoded data CD which becomes decodable when an application adding means 44 adds an application AM for decoding, is classified into the decodable group EF by a category changing means 42. As a result, the same encoded data CD is prevented from being obtained repeatedly, resulting in an improvement in the management efficiency of the encoded data CD. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a playback apparatus that acquires encoded data encoded by a predetermined encoding method and decodes / reproduces the encoded data.

  In recent years, a number of techniques for capacity-compressing AV data such as music and images have been proposed, and in accordance with this, the number of compression encoding systems has also increased. The encoded data compressed in this way cannot be decoded into the original data only by a dedicated decoding method. Therefore, recent music / image playback apparatuses need to support a large number of decoding methods.

  However, while a new encoding method is implemented and encoded data is distributed, there is a case in which the playback apparatus is delayed in dealing with the dedicated decoding method. For this reason, when a reproducing apparatus obtains and stores a large number of encoded data by downloading via a network or the like, a state in which there is a mixture of data that can be decoded and data that cannot be decoded occurs.

In the conventional playback device, among the stored data that is mixed, the playback device of its own device lists and presents only the encoded data that can be decoded and played back at that time, and the encoded data that cannot be decoded and played back However, there is a technique for preventing an instruction for erroneous decoding and reproduction.
JP 2001-359050 A (paragraph number 0051)

  In the conventional playback device described above, even when it becomes possible to additionally support a new decoding method due to version upgrade of internal software, the encoded data corresponding to the decoding method that has been impossible to be decoded and reproduced until then is It was treated as it was and was not decoded and reproduced.

  The problem to be solved by the present invention includes the above-described problem as an example.

  In order to solve the above-mentioned problem, the invention described in claim 1 decodes and reproduces encoded data encoded by a predetermined encoding method using a decoding application (hereinafter referred to as a decoding application). A data acquisition unit for acquiring the encoded data, and a decodable classification based on whether or not the encoded data acquired by the data acquisition unit can be decoded by an existing decoding application. Data classification means for classifying into any of the non-decodable classification, application addition means for adding a decoding application corresponding to an appropriate encoding method, and the application among the encoded data classified into the non-decoding class A class change means for changing the encoded data that has become decodable according to the addition status of the add means to the decodable classification; Sortable decodes the separated encoded data, and a reproducing means for reproducing.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing an example of an electrical hardware configuration of an AV player 100 as a playback apparatus according to the present embodiment.
In this AV player 100, an interface 1, a CPU 2, a storage device 10, a display control circuit 6 and a sound generation control circuit 8 are connected to a bus 15. A speaker 9 and a display 7 are connected to the AV player 100. The AV player 100 can be connected to a communication network 11 such as a LAN or the Internet, an optical disk 12 such as a DVD, a portable storage device 13 using a flash memory, and a touch panel 14 via the interface 1. . The display 7, the speaker 9, the optical disk 12, and the touch panel 14 may be configured as a part of the AV player 100.

  The storage device 10 includes a ROM 3, a RAM 4, and a recording medium 5. The ROM 3 is an information storage medium in which various processing programs described later and other necessary information are written in advance. The RAM 4 is an information storage medium on which information necessary for executing the various programs is written and read. The recording medium 5 is an information storage medium such as a flash memory or a hard disk. The recording medium 5 can store encoded data and a playlist table described later in a nonvolatile manner.

  The CPU 2 has a function of exchanging data among the storage device 10, the interface 1, the display control circuit 6 and the sound generation control circuit 8 according to the operations of the various programs, and performing various calculations and controls.

  The speaker 9 has a function of outputting sound under the control of the sound generation control circuit 8 that has received sound data from the CPU 2.

  The display 7 has a function of displaying a still image or a moving image under the control of the display control circuit 6 that has received the image data from the CPU 2.

  The touch panel 14 is a transparent switch provided along the surface of the display area of the display 7, for example. The touch panel 14 is configured to be able to recognize that the contact point switch is turned on when there is a contact by a driver or a passenger according to the display object in the display area of the display 7, for example. Yes.

FIG. 2 is a block diagram showing a software configuration example of a player program that operates in the AV player 100 shown in FIG.
The player program includes, as its functions, a data acquisition unit 41, a control unit 42, a decoding / playback unit 43, and an application addition unit 44, and allows the AV player 100 to exhibit the functions described above and the functions described below.

  The data acquisition unit 41 corresponds to a data acquisition unit, acquires encoded data as content (audio or image data) from the communication network 11, the optical disc 12, and the portable storage device 13 via the interface 1, and the recording medium 5 Has a function of saving in the encoded data storage unit FD.

  The control unit 42 corresponds to a data classification unit, a classification change unit, and a list creation unit, and each encoded data stored in the encoded data storage unit FD of the recording medium 5 by the data acquisition unit 41 is decoded at that time. Based on availability, it has a function of classifying it into a reproducible classification and a non-reproducible classification and changing the classification as necessary. In the example of the present embodiment, it is assumed that the recording medium 5 is file-managed in a hierarchical directory structure, and what can be decoded and reproduced immediately when the encoded data is acquired is stored in the reproducible file folder EF and decoded. Items that cannot be reproduced are stored in the unreproducible file folder DF. In addition, the control unit 42 lists the names of the encoded data stored in the encoded data storage unit FD in a predetermined type system for each of the reproducible file folder EF and the non-reproducible file folder DF. The playlist table PT is created. Note that a reproducible list EL is created corresponding to the reproducible file folder EF, and a reproducible list DL is created corresponding to the reproducible file folder DF.

  The decoding / reproducing unit 43 corresponds to a reproducing unit, decodes and reproduces the encoded data corresponding to the content designated by the control unit 42 based on the playlist table PT, and passes through the sound generation control circuit 8 or the display control circuit 6. Output to the speaker 9 or the display 7. The decoding / playback unit 43 stores an application module AM (hereinafter referred to as a decoding application module AM) that is a decoding application corresponding to an appropriate encoding method. The decoding application module AM corresponding to the encoded data encoding method is executed to perform decoding reproduction. Note that these decoding application modules AM are described as “CODEC-A” in the illustrated example.

  The application adding unit 44 corresponds to an application adding unit, and has a function of causing the decoding / playback unit 43 to store the decoding application module AM newly acquired via the communication network 11 or the like.

  3 and 4 are diagrams showing examples of the configuration of the playlist table PT, the reproducible file folder EF, and the non-reproducible file folder DF shown in FIG. It is assumed that all encoded data handled in the example of the present embodiment is audio content.

  In the playlist table PT shown in FIGS. 3 and 4, as described above, the playable list EL corresponding to the encoded data CD that can be decoded and played back by the decoding / playback unit 43 of the AV player 100 at that time, as described above. At that time, the decoding / playback unit 43 of the AV player 100 is roughly divided into two types, ie, the non-playable list DL corresponding to the encoded data CD that cannot be decoded and played back. In this example, the playlists EL and DL are further classified into categories of “all songs in order of song name”, “by artist”, and “by genre”, and in particular, only the non-reproducible list DL means the type in the encoding method. There is a category by format. In each category, subcategory types are set as necessary.

  In this way, the classification system is set for each of the reproducible list EL and the non-reproducible list DL, and the name as the identification information of the encoded data CD corresponding to each type and the link that is the storage location information. By storing and registering the destination path, a playlist table PT is created as list information of all encoded data CDs. In this example, the name of the encoded data CD is described with the music title of the music content as it is.

  In the example shown in FIG. 3, a content file named “Tomorrow”, which is encoded data CD that can be decoded and reproduced, is stored and saved in a reproducible file folder EF having a folder name “OK”. The content file name “Tomorrow” corresponds to the link destination path “H: ¥ System ¥ Files ¥ OK” expressed as storage destination information in the hierarchical directory structure in the playable list EL. Each type is recorded. In this example, the category type of “all songs in order of song name”, the type of “by artist”, the type of “Sato XX child”, and the type of “by genre” are recorded in the type of “pops”. In the following, recording a name and a link destination path of a content file corresponding to each of the predetermined content files in the playlist table PT will be referred to as “setting a link”.

  The user can easily specify the name of the desired content file and instruct reproduction by referring to the various types in the playlist table PT, and the decoding / reproducing unit 43 can link to the instructed content file. The content file can be accessed based on the destination path.

  On the other hand, in the example shown in FIG. 3, the content file named “Tomorrow's ahead”, which is the encoded data CD that cannot be decoded and reproduced, is stored and saved in the non-reproducible file folder DF with the folder name “NG”. Yes. In this example, the type of “CODEC-Y” in “format”, the category of “all songs in order of song title”, the type of “Tanaka △ Δ husband” in “by artist”, and the type of “by category” A link is set for each type of “pops”. Here, the “CODEC-X”, “CODEC-Y”, and “CODEC-Z” subcategories in the “format-specific” category shown in the figure are decoding applications that the decoding / playback unit 43 has not yet acquired at that time. The name corresponds to the module AM.

  In this embodiment, when the encoded data CD is acquired by downloading via the communication network 11 or the like, the encoding method is determined, and at that time, the corresponding decoding application module AM is recorded in the decoding / playback unit 43. Based on the determination whether the encoded data CD can be decoded and reproduced at that time, as shown in FIG. 3, the encoded data CD can be reproduced as a reproducible file folder EF or a non-reproducible file folder DF. Are sorted and stored, and a link is set to either the playable list EL or the non-playable list DL.

  When the application adding unit 44 can newly acquire the decoding application module AM by upgrading the system or the like, the encoded data CD of the corresponding encoding method can be decoded and reproduced thereafter. Accordingly, as shown in FIG. 4, the corresponding encoded data CD is moved from the non-reproducible file folder DF to the reproducible file folder EF, so that the link with the non-reproducible list DL is released and to the reproducible list EL. Set the link for.

  The AV player 100 has one configuration example as described above. Next, an example of a method for acquiring, managing, and decoding / playing encoded data according to the one configuration example will be described with reference to FIG. This method is constituted by each step that the player program executes in the CPU 2 and includes the following content management reproduction processing.

  FIG. 5 is a flowchart illustrating a procedure example of content management reproduction processing. This content management reproduction process includes a procedure realized by the player program operating under the control of the CPU 2. In the state before the content management reproduction process is started, it is assumed that the playlist table PT having the classification system as shown in FIG.

  First, for example, the user performs a predetermined operation on the AV player 100 via the touch panel 14. This predetermined operation is, for example, an operation for starting a desired process for music content. When this operation command is received, processing by the control unit 42 is started under the control of the CPU 2 and operates as follows.

  First, in step S <b> 5, it is determined whether or not an operation for instructing to newly acquire content is performed from the user via the touch panel 14. If an instruction operation for acquiring new content has not been performed, the process directly proceeds to step S55. On the other hand, when an instruction operation for acquiring new content is performed, the process proceeds to the next step S10.

  In the next step S10, the data acquisition unit 41 newly selects the encoded data CD, which is a music content file, through the user's selection operation of the acquisition medium such as the communication network 11, the optical disc 12, or the portable storage device 13. To get.

  In the next step S15, the format of the encoded data CD acquired in step S10, that is, the encoding method is determined, and in the next step S20, can the AV player 100 perform decoding and reproduction corresponding to the encoding method? It is determined whether or not the decoding / playback unit 43 stores the decoding application module AM corresponding to the encoding method at this time.

  If the AV player 100 can perform decoding and reproduction corresponding to the encoding method, the encoded data CD is stored in the reproducible file folder EF in the next step S25, and the corresponding replayable list EL corresponds in the next step S30. Set links for all types. Then, the process proceeds to next Step S55.

  On the other hand, if it is determined in step S20 that the AV player 100 cannot perform decoding / reproduction corresponding to the encoding method at that time, the process proceeds to step S35 and the encoded data CD is stored in the non-reproducible file folder DF. .

  In the next step S40, it is determined whether or not the category of the subcategory corresponding to the encoding method has already been created in the “by format” category of the unplayable list DL. In the next step S45, a new type of subcategory corresponding to the encoding method is newly created, and then the process proceeds to step S50. If already created, the process proceeds to step S50 as it is. In step S50, a link is set in the reproduction impossible list DL, and the process proceeds to the next step S55.

  In step S55, it is determined whether or not an operation for instructing the user to reproduce the content, that is, to decode and reproduce the encoded data CD, is performed via the touch panel 14. When the reproduction instruction operation is performed, the process proceeds to the next step S60, where the decoding / reproducing unit 43 performs decoding / reproduction using the designated content, that is, the decoding application module AM corresponding to the encoded data CD, and the next step The process moves to S65. Here, the content to be reproduced is designated again by the user by referring to the reproducible list EL. On the other hand, if the reproduction instruction operation has not been performed in the determination in step S55, the process directly proceeds to step S65.

  In step S65, whether or not the AV player 100 has accessed a predetermined server or network service via the communication network 11 or the like and has acquired new upgrade information, specifically, the system software of the AV player 100 is acquired. It is determined whether or not distribution start information such as a file to be updated to a new version has been received. If new upgrade information has not been acquired, the process proceeds to the next step S70. Even when the new version upgrade information is acquired, the determination in step S65 may be performed in consideration of whether or not the addition of a new decryption application module AM is included as a specific content of the version upgrade. Good.

  In step S70, it is determined whether or not a period for checking whether or not a new decryption application module AM can be acquired has elapsed. In this example, the AV player 100 can acquire a decryption application module AM stored in the decryption / playback unit 43 by accessing a predetermined application acquisition server or network service via the communication network 11. Then, by repeatedly accessing the acquisition server or the like in a predetermined check cycle period and checking whether a new decoding application module AM can be acquired, the types of encoding methods that can be automatically decoded and reproduced are increased. In the procedure of step S70, it is determined whether or not the predetermined check cycle period has elapsed since the previous access to the application acquisition server or the like. When the check cycle period has not elapsed, the process proceeds to the next step S75.

  In step S75, it is determined whether or not an operation for instructing the user to end the content management reproduction process has been performed via the touch panel 14. When the end instruction operation is performed, this flow is ended. On the other hand, if the end instruction operation has not been performed, the process returns to step S5 and the same procedure is repeated.

  On the other hand, if the new upgrade information has been acquired in the determination of step S65, the process proceeds to step S80, where the application adding unit 44 accesses a predetermined upgrade server or the like via the communication network 11 or the like. Download the update file and upgrade the system software. The acquisition of the update file is not limited to the method via the communication network 11 but may be obtained by a method of obtaining via the optical disk 12 or the portable storage device 13. If the addition of a new decryption application module AM is not included as specific contents of the version upgrade, a new decryption application module AM may be requested at that time. Then, the process proceeds to next Step S90.

  On the other hand, if it is determined in step S70 that the check period has elapsed, the process proceeds to step S85, where the application adding unit 44 accesses the predetermined application acquisition server or the like via the communication network 11 or the like, It is checked whether the decryption application module AM can be acquired. Then, if it is found by this acquisition check that a new decoding application module AM can be acquired, it is immediately acquired and stored in the decoding / playback unit 43. Then, the process proceeds to next Step S90.

  As described above, in step S90 after the version upgrade in step S80 or after the acquisition check in step S85, a new decryption application module AM is actually acquired by the procedures in steps S80 and S85. It is determined whether it has been completed. If the version has been upgraded in step S80 but the addition of the decryption application module AM has not been included in the contents, or if it has been found in step S85 that a new decryption application module AM has not yet been acquired, step S75 It is determined whether or not there is an end instruction operation.

  On the other hand, if the addition of a new decryption application module AM is included in the contents of the upgrade performed in step S80, or it is found that a new decryption application module AM can be acquired by the acquisition check in step S85. If it has been acquired, the process proceeds to the next step S95.

  In step S95, all the encoded data CD corresponding to the decoding application module AM confirmed to be acquired in the determination of step S90, that is, all the links set to the corresponding format type on the reproduction impossible list DL. Assuming that the content file can be subsequently decrypted and reproduced, the content file is moved from the unreproducible file folder DF to the reproducible file folder EF.

  In the next step S100, the names and link destination paths of all corresponding contents in the unplayable list DL are deleted, and further the subcategory of the corresponding decryption application module AM in the “by format” category is deleted. To release the link.

  In the next step S105, a link is set by describing the name of the content and the link destination path corresponding to all corresponding types in the playable list EL. And it returns to step S5 and repeats the same procedure.

  In the playback apparatus 100 (corresponding to an AV player) in the above-described embodiment, the encoded data CD encoded by a predetermined encoding method is decoded and reproduced using the decoding application AM (corresponding to a decoding application module). A data acquisition unit 41 (corresponding to a data acquisition unit) for acquiring the encoded data CD, and an existing decoding application for the encoded data CD acquired by the data acquisition unit 41. A data sorting means 42 (corresponding to a control unit) for sorting into either a decodable classification EF (corresponding to a reproducible file folder) or a non-decodable classification DF (reproducible file folder) based on whether or not decoding is possible in AM; Decoding application AM (corresponding to decoding application module) corresponding to an appropriate encoding method ) Can be decoded depending on the addition status of the application adding means S80 and S85 out of the encoded data CD classified into the undecodable classification DF. A class changing unit 42 (corresponding to the control unit) that changes the encoded data CD into the decodable classification EF, and a reproducing unit 43 (decoding and reproducing unit) that decodes and reproduces the encoded data CD classified into the decodable classification. Equivalent).

  In this way, even when various encoded data CDs are acquired by the data acquisition unit 41, they can be sorted and stored into a decodable classification EF and a non-decoding class DF by the data classification unit 42, so that decoding is possible. It is possible to prevent the occurrence of a device error due to the decoding means 43 erroneously decoding the impossible encoded data CD. Further, the encoded data CD that can be decoded according to the addition status of the decoding application AM by the application adding unit 44 is classified into the decodable classification EF by the classification changing unit 42, and the reproduction unit 43 performs decoding reproduction. Can be executed. As a result, the waste of acquiring the same encoded data CD again can be omitted, and the management efficiency of the encoded data CD is improved. In addition, since it is assumed that the classification of the encoded data CD can be changed in the future as described above, when the encoded data CD is acquired by the data acquisition means 41, the encoding method of each encoded data CD is changed. Acquisition with a high degree of freedom that does not require special awareness is possible.

  In the above embodiment, the file management of the recording medium 5 is performed in a hierarchical directory structure, and the reproducible file folder EF and the non-reproducible file folder DF corresponding to the decodable classification EF and the non-decryptable classification DF are created. The encoded data CD is classified by storing it in one of the file folders, but the present invention is not limited to this. For example, the physical storage area specified by the address in the recording medium 5 is classified. And may be classified by adding a specific identifier to the content file name of each encoded data CD.

  In the reproducing apparatus 100 in the above embodiment, in addition to the above-described configuration, the data classification unit 42 performs classification when the data acquisition unit 41 acquires the encoded data CD.

  In this way, since all the encoded data CDs are stored in a form that has already been classified into the decodable classification EF and the non-decodable classification DF, the user can perform decoding reproduction stored in the decodable classification EF at that time. It is possible to instruct to decode and reproduce only the encoded data CD that can be decoded, and to consider deleting the encoded data CD that is stored in the non-decodable classification DF and cannot be decoded and reproduced. be able to.

  In the reproducing apparatus 100 in the above embodiment, in addition to the above-described configuration, the data list information PT (listed on the basis of the identification information of the encoded data CD (corresponding to the name of the encoded data CD) in a predetermined classification system) A list creation unit 42 (corresponding to a control unit) for creating a list table EL corresponding to the decodable classification EF (corresponding to a playable list). ) And undecodable data list information DL (corresponding to the unreproducible list) corresponding to the undecodable classification DF, respectively.

  In this way, the user can easily search for and specify the desired type of encoded data CD with reference to the data list information PT, and the search / specification of the decodable classification EF and the non-decodable classification DF. Each can be done separately.

  In the above embodiment, the data list information PT is configured in a table format. However, the present invention is not limited to this, and the data list information PT may be configured in a format for managing files and folders in a hierarchical directory structure.

  In the above embodiment, the name of the encoded data CD, that is, the content file name described in this example as the song name of the music content is described as the identification information of the encoded data CD described in the data list information PT. The present invention is not limited to this. For example, an identification code assigned uniquely identifiable in all encoded data CD may be described in the data list information PT as it is. In this case, when displaying the data list information PT on the display 7, it is preferable to convert the identification code of each encoded data CD into a corresponding song name so that the user can easily recognize it.

  In addition, the user may be allowed to specify content or type that does not need to request the decryption application AM, or content may be deleted not only on a content basis but also on a classification basis.

  In the reproducing apparatus 100 in the above embodiment, in addition to the configuration described above, the list creation means 42 further associates the encoded data CD with the identification information of each encoded data CD in the data list information PT. Storage destination information (corresponding to a link destination path) for calling is stored.

  In this way, the encoded data CD searched and specified by the user with reference to the data list information PT can be easily and quickly called from the recording medium 5. In addition to the link destination path described corresponding to the hierarchical directory structure, the storage destination information is described by, for example, a physical address in the recording medium 5 in which the corresponding encoded data CD is actually stored. You may do it.

  In the reproducing apparatus 100 in the above embodiment, in addition to the above-described configuration, the list creation unit 42 further provides a type for each encoding method that cannot be decoded in the type system of the undecodable data list information DL.

  In this way, a plurality of encoded data CDs classified into the undecodable classification DF can be distinguished and listed for each encoding method, or can be handled collectively for each encoding method. As a result, requests for the decoding application AM, deletion of unnecessary contents, and the like can be taken into consideration for each type of encoding method that cannot be decoded.

  When a new subcategory type corresponding to an encoding method that cannot be decoded / reproduced, that is, when the determination in step S40 in the flow of FIG. 5 is not satisfied, the corresponding encoding method is supported at that time. Whether or not the decryption application AM can be acquired is checked, and it may be acquired if possible. If it can be acquired, the acquired encoded data CD may be stored in the decodable classification EF as it is without creating a new subcategory type, and a link may be set in the decodable data list information EL.

  Further, when a decoding application AM is requested by a subcategory type that is not decodable in the undecodable data list information DL, that is, by format, a subcategory with a large number of contents to which links are set. You may request | require in order of a classification, and you may request | require only the subcategory classification | category in which the fixed number or more links are set.

  In addition, the content and the sub-category type for each format for which a link is set in the undecryptable data list information DL are automatically deleted when the corresponding decryption application AM cannot be additionally acquired even after a predetermined storage period. You may make it do. Alternatively, when the free storage capacity in the recording medium 5 runs out or when the recording medium 5 becomes less than a predetermined occupation rate, the content set with a link in the undecryptable data list information DL may be deleted.

  In addition, when all of the predetermined content in the non-decryptable classification DF and its related links are deleted, and there is a sub-category type by format in which there is no content to set the link, the sub-category by the format By deleting the types themselves, it is possible to reduce the sub-category types that need to acquire the decryption application AM.

  In the reproducing apparatus 100 in the above embodiment, in addition to the above-described configuration, the classification changing unit 42 further changes the encoded data CD classified into the non-decodable classification DF to the decodable classification EF. Delete the identification information of the encoded data CD in the undecodable data list information DL, the storage location information related to the identification information, and the type for each non-decodable encoding method to which the encoded data CD belongs. At the same time, the identification information of the encoded data CD and the storage location information related thereto are stored in the same system location in the decodable data list information EL.

  In this way, even when the classification changing unit 42 changes the encoded data CD classified into the undecodable classification DF to the decodable classification EF, it functions as a correspondence relationship between the encoded data CD and the data list information PT. Since the link setting is changed to an appropriate state, the user can search and specify the encoded data CD with reference to the decodable data list information EL, and the encoded data CD storage unit in the recording medium 5 It can be called reliably from the FD.

  In the playback apparatus 100 in the above embodiment, in addition to the above-described configuration, the application adding unit 44 further confirms whether or not the decoding application AM can be added at a predetermined time interval.

  In this way, the application adding means can repeatedly access the acquisition server or the like at a predetermined time interval, that is, an appropriate check cycle period, and check whether or not a new decoding application AM can be additionally acquired. It is possible to increase the types of encoding methods that can be performed.

  In addition to checking in a check cycle period that is a fixed time interval, for example, when the reproduction means 43 attempts to decode and reproduce the encoded data CD classified into the undecodable classification DF, the encoded data Whether or not the decoding application AM corresponding to the CD encoding method can be added may be confirmed. In this case, it is necessary for the user to specify the encoded data CD stored in the undecodable classification DF with reference to the undecodable data list information EL.

  In this way, it is possible to check whether or not the corresponding decoding application AM can be acquired for the encoded data CD that cannot be decoded and reproduced arbitrarily selected by the user at any timing.

  In addition, when the list creation unit 42 determines that it is necessary to provide a new type by encoding method that cannot be decoded in the type system of the non-decodable data list information PT, the application adding unit 44 Whether or not the decoding application AM corresponding to the encoding method can be added may be confirmed.

  In this way, it is possible to check whether or not it is possible to acquire a decoding application AM that quickly responds to a new encoding method type.

  It should be noted that the history of performing the above-described decryption availability check and acquisition process itself may be recorded and held for management. In this case, the history records the format name checked / acquired, that is, the encoding method, the name of the server or network service to be checked / acquired, the date / time of check / acquirement, and the like. Furthermore, the transition of the number of links set for each format, link setting date and time, identification information of linked content files, and the like may be recorded.

  In addition, this embodiment is not restricted above, A various deformation | transformation is possible. Hereinafter, such modifications will be described in order.

(1) When performing classification based on whether or not decoding reproduction is possible during decoding and reproduction of the encoded data CD In the above embodiment, when all the encoded data CDs are acquired, whether or not decoding reproduction is possible is immediately determined and a reproducible file folder The EF and the unreproducible file folder DF are stored separately and links are set to the corresponding playlists EL and DL. However, the present invention is not limited to this, and when the encoded data CD is acquired, all can be reproduced once. Saving to the file folder EF and setting a link may be performed, and when the encoded data CD is individually designated for decoding and reproduction, whether or not decoding reproduction can be performed is determined again to perform separate storage and link setting again. .

  In the present modification, encoded data CD that can be decoded / reproduced and encoded data CD that cannot be decoded are mixed in the reproducible file folder EF, and the encoding designated from the reproducible file folder EF for decoding / reproduction is included. If the data CD cannot be decoded and reproduced at that time, the encoded data CD is moved from the reproducible file folder EF to the nonreproducible file folder DF as shown in FIG. Canceling and setting a link with the reproduction impossible list DL are performed.

  FIG. 7 is a flowchart showing an example of the procedure of content management reproduction processing according to this modification, and corresponds to FIG. 9 described above. The flow of FIG. 7 is roughly the same as the flow of FIG. 5 described above, and the procedure of step S15 and step S20 is directly moved between step S55 and step S60 and executed as the procedure of step S57 and step S59. Accordingly, when the procedure of step S35, step S40, step S45 and step S50 does not satisfy the determination of step S59 as it is, that is, when the encoded data CD designated for decoding and reproduction cannot be decoded and reproduced. Will come to be. And after finishing the procedure of step S50, it will move to step S65. Other procedures are the same as those in the flow of FIG.

  Also in this modified example, as described above, when a new subcategory type corresponding to an encoding method that cannot be decoded and reproduced is created, that is, when the determination of step S40 in the flow of FIG. 7 is not satisfied, At that time, whether or not the decoding application AM corresponding to the encoding method can be acquired is checked, and if possible, it may be acquired. If it can be obtained, the process proceeds to step S60, and the decryption / playback unit 43 may immediately play the designated content using the decryption application AM that has been obtained.

  In the reproduction apparatus 100 according to the modified example, in addition to the above-described configuration, the data acquisition unit 41 further classifies all the acquired encoded data CD into the decodable classification EF, and the data classification unit 42 includes: The reproduction means 43 performs classification on the encoded data CD to be decoded and reproduced.

  In this way, for example, even when a large amount of new encoded data CD is acquired, rapid storage and link setting can be performed, so that the management efficiency of the encoded data CD is improved.

(2) Others In the above-described embodiments and modifications, the AV player is configured as a stationary type assuming an environment in which the AV player can always be connected to the communication network 11, but the present invention is not limited to this, and for example, detailed illustration is omitted. However, the recording medium 5 for storing the encoded data CD and the playlist table PT may be configured as a detachable portable storage device so that it can be connected to and shared with a vehicle-mounted navigation device. In this case, while the recording medium 5 is connected to the navigation device, it is not possible to acquire the encoded data CD via the communication network 11 or to additionally acquire the decoding application module AM including version upgrade. However, when the recording medium 5 is connected to the AV player, various acquisition processes and editing management of the playlist table PT can be performed.

  In the above-described embodiment and each modified example, the case where all the encoded data CD to be handled is music content has been shown. However, the present invention is not limited to this, and moving image content and the like may be handled together.

  In addition to those already described above, the methods according to the above-described embodiments and modifications may be used in appropriate combination.

FIG. 3 is a block diagram illustrating an example of an electrical hardware configuration of an AV player. FIG. 2 is a block diagram showing a software configuration example of a player program that operates in the AV player shown in FIG. 1. It is a figure which shows the structural example of a play list table, a reproducible file folder, and a nonreproducible file folder. It is a figure which shows the change of the structure of the play list table at the time of changing the classification | category of encoding data, a reproducible file folder, and a non-reproducible file folder. It is a flowchart which shows the example of a procedure of content management reproduction | regeneration processing. It is a figure which shows the change of the structure of the play list table at the time of changing the classification | category of encoding data, a reproducible file folder, and a non-reproducible file folder. It is a flowchart which shows the example of a procedure of content management reproduction | regeneration processing.

Explanation of symbols

2 CPU
DESCRIPTION OF SYMBOLS 5 Recording medium 7 Display 9 Speaker 11 Communication network 12 Optical disk 13 Portable memory | storage device 14 Touch panel 41 Data acquisition part (equivalent to a data acquisition means)
42 control unit (corresponding to data sorting means, classification changing means, list creating means)
43 Decoding / reproducing unit (corresponding to reproducing means)
44 Application addition part (equivalent to application addition means)
100 AV player (equivalent to a playback device)
CD encoded data DF Unreproducible file folder
DL unplayable list (equivalent to undecryptable data list information)
EF Reproducible file folder (corresponding to decryptable classification)
EL playable list (equivalent to decryptable data list information)
FD encoded data storage unit PT playlist table (corresponding to data list information)

Claims (10)

A playback device that decodes and plays back encoded data encoded by a predetermined encoding method using a decoding application (hereinafter referred to as a decoding application),
Data acquisition means for acquiring the encoded data;
Data classification means for classifying the encoded data acquired by the data acquisition means into either a decodable class or a non-decodable class based on whether decoding can be performed in an existing decoding application;
An application adding means capable of adding a decoding application corresponding to an appropriate encoding method;
Of the encoded data classified into the non-decodable classification, classification changing means for changing the encoded data that became decodable depending on the addition status of the application adding means to the decodable classification;
Reproducing means for decoding and reproducing the encoded data classified into the decodable classification,
A playback apparatus comprising: The playback device according to claim 1,
The reproduction apparatus according to claim 1, wherein the data classification unit performs classification when the data acquisition unit acquires encoded data. The playback device according to claim 1,
The data acquisition means classifies all acquired encoded data into the decodable classification,
The reproduction apparatus characterized in that the data classification means performs classification on encoded data to be decoded and reproduced by the reproduction means. The playback device according to any one of claims 1 to 3,
Having a list creation means for creating data list information listing identification information of encoded data in a predetermined classification system;
The playback apparatus according to claim 1, wherein the list creation means creates decodable data list information corresponding to the decodable classification and non-decryptable data list information corresponding to the non-decodable classification. The playback apparatus according to claim 4, wherein
The reproduction apparatus according to claim 1, wherein the list creation means stores storage destination information for calling the encoded data in association with identification information of each encoded data in the data list information. The playback device according to claim 4 or 5,
The reproduction apparatus according to claim 1, wherein the list creation means provides a type for each encoding method that cannot be decoded in a type system of the undecodable data list information. The playback device according to claim 6.
The classification changing means, when changing the encoded data classified into the non-decodable classification to the decodable classification, the identification information of the encoded data in the non-decodable data list information and the identification information Storage destination information and the type by encoding method that cannot be decoded to which the encoded data belongs, and the identification information of the encoded data in the decodable data list information and the storage related thereto A reproduction apparatus characterized by storing the previous information at an equivalent system position. The playback device according to any one of claims 4 to 7,
The playback apparatus according to claim 1, wherein the application adding unit checks whether or not the decoding application can be added at a predetermined time interval. The playback device according to any one of claims 4 to 7,
When the reproduction means tries to decode and reproduce the encoded data classified into the non-decodable classification, the application adding means can add or not add a decoding application corresponding to the encoding method of the encoded data A playback device characterized by confirming. The playback device according to any one of claims 4 to 7,
The application adding means, when the list creating means determines that it is necessary to provide a new type of encoding method that cannot be decoded in the type system of the non-decodable data list information, A playback apparatus that checks whether or not a corresponding decoding application can be added.

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