JP2007200484A - Reproducing apparatus and data receiving method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reproducing apparatus and a data receiving method capable of securing free space without troubling a user and drastically reducing a burden on the user and transfer time of contents when the free space for recording the contents is not secured in a data file recording means. <P>SOLUTION: A data management part 16 specifies a total data amount scheduled to receive as a data amount to receive, and judges whether or not the data file recording part 121 has the free space capable of recording the specified data amount to receive, and when the data management 16 part judges that the data file recording part 121 has no free space for recording the data amount to receive, the data management part 16 specifies a play list with the lowest priority among the play lists recorded in a play list recording part 122 as a play list for deletion, and deletes the content described in the specified play list for deletion from the data file recording part 121. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a playback apparatus and a data receiving method that have data file recording means for recording a data file of content such as video and music, read out the content data file from the data file recording means, and particularly via a network. The present invention relates to a reproducing apparatus and a data receiving method having a function of receiving a content data file and recording it in a data file recording means.

  In recent years, in a playback device such as an audio player that plays back content such as video and music, a large-capacity recording means such as an HDD or a silicon memory has come to be used as a data file recording means for recording a content data file. In addition, a large amount of content (data file) can be recorded in the data file recording means.

  Among the contents recorded in large quantities in this way, there is a function called a playlist as a function for reproducing only a plurality of contents desired by the user according to the place and situation. The playlist is a list in which a plurality of contents selected according to the user's preference are described. In-device addresses indicating the locations where the contents are recorded, file names, and the like are described, and playback based on the playlist is instructed. Then, a plurality of contents described in the playlist are sequentially played back.

  Conventional playlists are based on the premise that content is recorded in the playback device, and cannot be used in other playback devices. That is, the content described in the playlist is not necessarily recorded on the other playback device, and even if the content described in the playlist is recorded on the other playback device, The in-device address and file name described are specific to the playback device in which the playlist has been created. In other playback devices, the corresponding content is the in-device address and file name described in the place list. Is not recorded, reproduction based on the playlist cannot be performed.

  Therefore, a new playlist that can be shared by a plurality of playback devices by describing a unique ID that identifies the content has been proposed (see, for example, Patent Document 1). By describing the unique ID in the playlist, the data file recorded in the data file recording means can be identified and reproduced based on the unique ID, and the data file is recorded in the data file recording means. Content that is not available can be collected and played back via the network based on the unique ID.

However, in the prior art, since the recording capacity of the data file recording means in the playback device is limited, if the data file recording means does not have a free capacity for recording the data amount of the content to be received, There is a possibility that all of the data files of the described contents cannot be transferred. In such a case, in order to secure a free space for recording the data amount of the received content in the data file recording means, the user specifies unnecessary contents one by one from the contents recorded in the data file recording means. Therefore, there is a problem that it is necessary to perform the operation of deleting the specified unnecessary content, which greatly increases the burden on the user and the transfer time of the content.
JP 2005-100612 A

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a user's hand when the data file recording means does not have a free space for recording the data amount of the received content. The present invention provides a playback device and a data receiving method that can secure a free space for recording the amount of data to be received without bothering the user, and can greatly reduce the burden on the user and the content transfer time. It is in.

In order to solve the above problems, the present invention has the following configuration.
The reproduction apparatus of the present invention has a data file recording means for recording a data file of content, and reads out the data file of the content from the data file recording means means and reproduces the data file via a network. A transmission / reception unit that receives the data file of content and records it in the data file recording unit; a playlist recording unit that records a playlist that is a list of the content to be played back; The received data amount specifying means for specifying the total data amount of the data file in the content as the received data amount, and the free capacity for recording the received data amount specified by the received data amount specifying means is the data file recording unit Sky to determine whether it exists in the means The play list recorded in the play list recording means when it is determined by the capacity judging means and the free capacity judging means that there is no free capacity for recording the received data amount in the data file recording means. Delete target playlist specifying means for specifying the playlist having the lowest priority as a delete target playlist, and the content described in the delete target playlist specified by the delete target playlist specifying means And a data management means for deleting the data file from the data file recording means.

  Further, in the playback device of the present invention, the deletion target playlist specifying means includes a recording date and time when the playlist was recorded, a final date and time when the playlist was most recently played back, The deletion target playlist is specified by using priority determination information including at least one of the number of reproductions as a determination material.

  Further, in the playback device of the present invention, the deletion target playlist specifying means is the last recorded date and time when the content was recorded and the date and time when the content was most recently played, which are described in the playlist. The deletion target playlist is specified using priority determination information including at least one of a date and time and the number of times of reproduction of the content as a determination material.

  Furthermore, in the playback apparatus of the present invention, the deletion target playlist specifying means specifies the deletion target playlist by using priority determination information including user protection information for the playlist as a determination material. .

  Furthermore, in the playback device of the present invention, the data management means records only the content not described in the other playlist among the content described in the deletion target playlist. It is made to delete from a means.

  Also, the data receiving method of the present invention includes a data file recording means for recording a data file of content, and reads out the data file of the content from the data file recording means means for reproduction via a network. A data reception method for receiving the data file of the content, wherein a playlist that is a list of the content to be played back is recorded, and a total amount of data of the data file in the content to be received is received data And determining whether or not the data file recording unit has a free capacity for specifying and recording the received data amount, and the free capacity for recording the received data amount is stored in the data file recording unit. If it is determined that it does not exist, the recorded playlist In identifying the lowest priority playlist for deletion playlist and deletes the data file of the content that is described in the deleted play list that identifies from the data file recording means.

  Furthermore, in the data receiving method of the present invention, any one of the recording date and time when the playlist was recorded, the last date and time when the playlist was most recently reproduced, and the number of times the playlist has been reproduced. The deletion target playlist is specified using priority order judgment information including at least a judgment material.

  Furthermore, in the data receiving method of the present invention, the recording date and time when the content is recorded, the last date and time when the content was most recently reproduced, and the number of times the content is reproduced are described in the playlist. The deletion target playlist is specified using priority order judgment information including at least one of the above as a judgment material.

  Furthermore, the data reception method of the present invention is characterized in that the deletion target playlist is specified by using priority determination information including user protection information for the playlist as a determination material.

  Furthermore, in the data receiving method of the present invention, only the content not described in the other playlist is deleted from the data file recording means among the content described in the deletion target playlist. It is characterized by.

  The playback apparatus and data reception method of the present invention records a playlist, which is a list of contents to be played back, specifies the total data amount of the data file in the content to be received as the received data amount, and specifies the specified reception It is determined whether or not the data file recording unit means has a free capacity capable of recording the data amount, and is recorded when it is determined that there is no free capacity to record the received data amount in the data file recording unit. By configuring the playlist with the lowest priority among the playlists as the deletion target playlist and deleting the data file of the content described in the specified deletion target playlist from the data file recording means , Delete content data files in unnecessary playlist units with low priority Therefore, when the free space for recording the data amount of the received content is not secured in the data file recording means, the data amount of the received content without bothering the user As a result, it is possible to secure a free space for recording the content, and to significantly reduce the burden on the user and the content transfer time.

  Furthermore, the playback device and the data receiving method of the present invention include any one of a recording date and time when a playlist is recorded, a final date and time that is the date and time when the playlist was most recently played back, and the playback count of the playlist. By configuring the deletion target playlist to use at least the priority determination information including the determination material, it is possible to efficiently specify the deletion target playlist according to the reproduction status of the playlist.

  Furthermore, the playback apparatus and data reception method of the present invention include the recording date and time when the content is recorded, the last date and time when the content was most recently played, and the number of times the content is played, which are described in the playlist. By configuring the deletion target playlist to use the priority determination information including at least one of them as the determination material, the deletion target playlist can be efficiently processed according to the reproduction status of the content described in the playlist. There is an effect that it can be specified.

  Furthermore, the playback device and the data receiving method of the present invention are configured to identify a playlist to be deleted by using priority determination information including user protection information for a playlist as a determination material, so that the playback status of the playlist can be improved. Regardless, the playlist protected by the user can be removed from the deletion target.

  Furthermore, the playback apparatus and data receiving method of the present invention are configured to delete only the contents not described in other playlists from the data file recording means among the contents described in the deletion target playlist. Thus, there is an effect that the content data file can be deleted in unnecessary playlist units with low priority without affecting other playlists.

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

  FIG. 1 is a block diagram showing a configuration of an embodiment of a playback apparatus according to the present invention, and FIG. 2 is a diagram showing an example of a playlist recorded in the playlist recording unit shown in FIG. These are figures which show the example of a playlist management table currently recorded on the playlist recording part shown in FIG. FIG. 4 is a diagram showing an example of a content list recorded in the content list recording unit shown in FIG.

  A playback device 10 according to the present embodiment is a portable playback device that plays back content such as video and music. With reference to FIG. 1, the playback device 10 is configured to be connectable to a network 20 such as the Internet. An information recording unit 12, a display unit 13 such as a liquid crystal display, an operation unit 14, a reproduction processing unit 15, and a data management unit 16 are provided.

  The transmission / reception unit 11 has a function of connecting to the network 20 by wire or wireless, and includes a content distribution server 30 that distributes content data files via the network 20 and an information processing device 40 such as a personal computer owned by a third party. Information communication is performed, the data file and the playlist are received from the content distribution server 30, and the playlist is received from the information processing apparatus 40, and the received data file and the playlist are recorded in the information recording unit 12. The data file received from the content distribution server 30 includes a unique ID that identifies the content. The playlist is a list of contents created by a content distributor or a third party. As shown in FIG. 2A, at least a unique ID for identifying the contents and a data amount of each content are described. ing. Although FIG. 2 shows an example of a playlist consisting only of a unique ID for specifying content, bibliographic data such as a content name and an artist name may be described in addition to the unique ID.

  The information recording unit 12 is a recording unit such as an HDD or a silicon memory, and the data file recording unit 121 that records the data file received from the content distribution server 30, and the play received from the content distribution server 30 and the information processing device 40. A playlist recording unit 122 in which a list is recorded, a content list recording unit 123 in which a content list that is a list of contents in which data files are recorded in the data file recording unit 121, and a playlist are described. However, the data file recording unit 121 includes an insufficient file list recording unit 124 in which an insufficient file list in which a list of contents in which no data file is recorded is described is recorded. Hereinafter, in the present specification, content that is described in the playlist but has no data file recorded in the data file recording unit 121 is referred to as insufficient content.

  In the playlist recording unit 122, a playlist management table in which priority determination information for determining the priority of the recorded playlist is recorded together with the playlist. As priority order determination information described in the playlist management table, referring to FIG. 3, the recording date and time when the playlist was recorded, the final date and time when the playlist was most recently reproduced, and the number of times the playlist was reproduced Protect information by the user can be considered. The playlist management table is rewritten as needed by the data management unit 16 when the priority determination information changes due to reproduction of the playlist or the like.

  Referring to FIG. 4, the content list recorded in the content list recording unit 123 includes the unique ID of the content in which the data file is recorded in the data file recording unit 121 and the recording position of the data file in the data file recording unit 121. Is a list composed of the in-device address and the data amount of each content, and the unique ID of the content newly recorded in the content list recording unit 123 and the in-device address are additionally recorded, and from the content list recording unit 123 The unique ID and in-device address of the erased content are deleted, and all the content recorded in the content list recording unit 123 is always covered. FIG. 2 shows an example of a content list including a unique ID for specifying content and an in-device address. In addition to the unique ID, the in-device address, and the data amount, bibliographic data such as a content name and an artist name is also displayed. You may make it describe.

  The missing file list includes a unique ID of the missing content, a data amount of each missing content, and playlist identification information such as a playlist name for identifying a place list in which the missing content is described. For each playlist including missing content, a missing file list may be created and recorded in the data file recording unit 121. The missing content included in each of the plurality of playlists may be recorded in the data file recording unit 121. It may be described in one missing file list.

  The display unit 13 is a display unit such as a liquid crystal display, and displays the video reproduced by the reproduction processing unit 15 and the playlist recorded in the content list recording unit 123.

  The operation unit 14 is an operation unit such as an operation button. The operation unit 14 is a display instruction input for instructing display of the playlist on the display unit 13, a selection input for selecting the playlist displayed on the display unit 13, and the selected playlist. A reproduction instruction input for instructing reproduction is performed.

  The reproduction processing unit 15 decompresses and reproduces the data file recorded in the data file recording unit 121 of the information recording unit 12, displays the video on the display unit 13, and outputs the audio to the connected headphones 50. To do.

  The data management unit 16 compares the content (unique ID) described in the play list instructed to be reproduced with the content (unique ID) described in the content list recorded in the content list recording unit 123. At the same time, it is determined whether the transmission / reception unit 11 is in a state where it can be connected to the network 20, and the content of the content by the reproduction processing unit 15 is determined according to the comparison result between the playlist and the content list and the connection status of the network 20. The reproduction and collection of insufficient content by the transmission / reception unit 11 are controlled. Further, when collecting the insufficient content, the data management unit 16 requests the content distribution server 30 to transmit the data file of the content. If the data file recording unit 121 does not have a free space for recording the total data amount of the data file, a free space securing process for securing a free space capable of recording the received data amount is performed.

Next, the reproduction operation of the present embodiment will be described in detail with reference to FIGS.
FIG. 5 is a flowchart for explaining the reproducing operation in the embodiment of the reproducing apparatus according to the present invention, and FIG. 6 shows an example of a playlist after collecting insufficient contents recorded in the playlist recording unit shown in FIG. FIG.

  When the reproduction of the playlist selected by the operation unit 14 is instructed, the data management unit 16 records the content (unique ID) described in the playlist instructed to reproduce and the content list recording unit 123. The content (unique ID) described in the content list is compared (step A1), and the in-device address of the content in which the data file is recorded in the data file recording unit 121 is written in the playlist. For example, when the playlist shown in FIG. 2A and the content list shown in FIG. 4 are compared, the unique IDs “## B”, “## A”, “## G”, “# Since the content of “#F” is described in the content list and the data file is recorded in the data file recording unit 121, as shown in FIG. 2B, the unique ID “## B”, “## A” ”,“ ## G ”,“ ## F ”, the corresponding in-device address is written.

  Next, the data management unit 16 is described in the playlist, but is not described in the content list, that is, the data file is not recorded in the data file recording unit 121 although it is described in the playlist. It is determined whether or not content exists (step A3). In the present embodiment, the play list is compared with the content list to determine whether there is insufficient content. However, the data file recording unit 121 records the unique ID together with the data file. In addition, it may be determined whether there is insufficient content by comparing the playlist and the unique ID recorded in the data file recording unit 121.

  If there is no missing content in step A3, that is, if all the data files of the content described in the playlist are recorded in the data file recording unit 121, the in-device address for all the content in the playlist. The data management unit 16 instructs the reproduction processing unit 15 to reproduce all the contents based on the playlist, and the reproduction processing unit 15 is based on the in-device address written in the playlist. Then, the data files of all contents described in the playlist are read from the data file recording unit 121 and sequentially played back (step A4), and the playback processing operation is terminated.

  If there is insufficient content in step A3, the data management unit 16 determines whether or not the transmission / reception unit 11 is in a state where it can be connected to the network 20 (step A5), and is not in a state where it can be connected to the network 20. In this case, a missing file list describing a list of missing contents is created, the created missing file list is recorded in the missing file list recording unit 124 (step A6), and the contents included in the playlist are also included. The reproduction processing unit 15 is instructed to reproduce the content in which the data file is recorded in the data file recording unit 121, that is, the content in which the in-device address of the playlist is written. Only the data file of the content where the address is written Sequentially reading out and reproducing the Le recording unit 121 (step A7), and terminates the reproduction processing operation.

  When the transmission / reception unit 11 is connectable to the network 20 in step A5, the data management unit 16 calculates the total amount of received data, that is, the data amount of the shortage content described in the shortage file list. Thus (step A8), it is determined whether or not the free space for recording the calculated received data amount exists in the data file recording unit 121 (step A9). (Step A10), the process proceeds to the next step. If there is free space, the process proceeds to the next step. The free space securing process in step A10 will be described later.

  Next, the data management unit 16 outputs the unique ID of the shortage content to the transmission / reception unit 11 to instruct the transmission / reception unit 11 to collect the shortage content and reproduce all the content described in the playlist. The reproduction processing unit 15 is instructed. The transmission / reception unit 11 collects the insufficient content, that is, requests the content distribution server 30 to transmit the data file of the insufficient content based on the unique ID, and receives the data file of the insufficient content transmitted from the content distribution server 30. The information is recorded in the data file recording unit 121 of the information recording unit 12 and the in-device address of the recorded data file is written in the playlist. As a result, all the contents described in the playlist are recorded in the data file recording unit 121, and the in-device address is written for all the contents of the playlist as shown in FIG. The reproduction processing unit 15 reads out data files of all contents described in the playlist from the data file recording unit 121 based on the in-device address written in the playlist, and sequentially reproduces them (step A11). The playback processing operation ends.

Next, the reproduction operation performed together with the insufficient content collection operation of the present embodiment will be described in detail with reference to FIGS.
FIG. 7 is a flowchart for explaining the reproduction operation performed together with the shortage content collection behavior in the embodiment of the reproduction apparatus according to the present invention, and FIG. 8 is the reproduction operation in the embodiment of the reproduction apparatus according to the present invention. It is explanatory drawing explaining the order change process of time.

  In step A7 shown in FIG. 5, since the operation of collecting insufficient content by the transmission / reception unit 11 and the operation of reproducing content by the reproduction processing unit 15 are performed in parallel, depending on the reproduction order and collection speed, There is a possibility that content that is not recorded in the data file recording unit 121 during collection may be subject to playback, and in this case, playback order switching processing is performed.

  First, the data management unit 16 sets the variable n to 1 (step B1), and sets whether or not the nth content described in the playlist exists with the nth content as a reproduction target, that is, data It is determined whether or not the in-device ID is recorded in the play list and recorded in the file recording unit 121 (step B2). If it exists, the nth content described in the play list is reproduced. The reproduction processing unit 15 instructs the reproduction processing unit 15 to read out the data file of the nth content described in the playlist from the data file recording unit 121 and reproduce based on the in-device address of the nth content. (Step B3).

  The data management unit 16 monitors the end of playback of the nth content (step B4), and when playback of the nth content ends, whether or not there is the next content, that is, content that has not been played is played. It is determined whether or not it is listed (step B5). If there is no next content, the playback operation is terminated. If there is a next content, n is incremented and the process returns to step B1 ( Step B6).

  If the n-th content described in the playlist in step B1 does not exist, the n-th content to be played back is before or during the collection, so the order of playing back the playback target content later A replacement process is performed (step B7), n is incremented, and the process returns to step B1 (step B8). As a result, even if the content to be played back is before or during collection, other content in which the data file is recorded in the data file recording unit 121 is played back first, and playback is not interrupted.

  As the order change process, for example, as shown in FIG. 2B, when the second content does not exist and the second content becomes a reproduction target, as shown in FIG. In addition, the content to be reproduced (second) may be descended in the next order (fourth) of the content that has not been reproduced and recorded in the data file recording unit 121, Further, as shown in FIG. 8B, the reproduction target (second) content may be descended in the latest order (seventh).

Next, the collecting operation of the missing content described in the missing file list recorded in the missing file list recording unit 124 of the information recording unit 12 will be described in detail with reference to FIG.
FIG. 9 is a flowchart for explaining an operation of collecting the missing content described in the missing file list recorded in the missing file list recording unit 124 shown in FIG.

  When the power of the playback apparatus 10 is turned on, the data management unit 16 determines whether or not the missing file list exists, that is, whether or not the missing file list is recorded in the missing file list recording unit 124 (step C1) If the missing file list exists, it is determined whether or not the playback device 10 is in an online state, that is, whether or not the playback device 10 can communicate with the content distribution server 30 via the network 20 (step C2). ). In the present embodiment, it is configured to determine whether or not purchase reservation information exists when the playback apparatus 10 is turned on. However, it is determined that a predetermined time is reached or a user operation is performed. It may be determined whether or not a missing file list exists.

  If there is no missing file list in step C1 and if the playback device 10 is not communicable in step C2, the data management unit 16 ends the operation of collecting the missing content described in the missing file list, If the playback apparatus 10 is online in C2, the received data amount, that is, the total data amount of the insufficient content described in the insufficient file list is calculated (step C3).

  Next, the data management unit 16 determines whether or not the free space for recording the received data amount calculated in step C3 exists in the data file recording unit 121 (step C4). After the free capacity securing process is performed (step C5), the process proceeds to the next step, and if there is a free capacity, the process proceeds to the next step as it is. The free space securing process in step C5 will be described later.

  Next, the data management unit 16 causes the transmission / reception unit 11 to transmit an insufficient content transmission request including the unique ID to the content distribution server 30 via the network 20 (step C6).

  When the content delivery server 30 receives the insufficient content transmission request from the reproduction device 10, the content distribution server 30 transmits the content data file specified by the unique ID of the insufficient content transmission request to the reproduction device 10, and the transmission / reception unit of the reproduction device 10 11 receives the data file of the insufficient content.

  When the data file of the insufficient content is received from the content distribution server 30 by the transmission / reception unit 11 (step C7), the data management unit 16 causes the data file recording unit 121 to record the received data file of the insufficient content (step C8). ) Write the in-device address of the recorded data file to the play list, delete the missing file list from the missing file list recording unit 124 (step C9), and end the missing content collection operation.

Next, the free space securing process for securing the free space in the data file recording unit 121 performed in step A10 and step D5 described above will be described in detail with reference to FIG.
FIG. 10 is a flowchart for explaining a free space securing process for securing free space in the data file recording unit 121 shown in FIG.

  First, the data management unit 16 calculates the shortage capacity by subtracting the current free capacity of the data file recording unit 121 from the received data amount (step D1), and the playlist recorded in the playlist recording unit 122. By referring to the management table, the deletion target playlist to be deleted is specified (step D2).

  The playlist to be deleted is specified by giving a priority to the playlist recorded in the playlist recording unit 122, and the playlist having the lowest priority is specified as the playlist to be deleted. The priority is given as priority judgment information (recording date / time, last date / time, playback count, protection information, etc.) in the playlist management table. The playlist protected by the user has the highest priority. Are treated as It should be noted that the determination criteria for giving priority to the playlist based on the priority determination information may be set in advance or may be set by the user. Also, priority determination information (recording date / time, final date / time, number of reproductions, protection information, etc.) for each content is managed, and the priority order of content described in the playlist is used as a determination material for giving priority to the playlist. Determination information may be used.

  Next, the data management unit 16 specifies content that is not described in another playlist among the content described in the playlist specified in Step D2 as a removable content that can be deleted (Step S1). D3) A deleteable data amount that is the sum of the data amounts of the specified deleteable contents is calculated (step D4).

  Next, the data management unit 16 compares the deleteable data amount calculated in step D4 with the insufficient capacity (step D5), and deletes the deleteable content specified in step D3, thereby receiving the received data amount. It is determined whether or not a free space that can be recorded can be secured, that is, whether or not the erasable data amount calculated in step D4 is larger than the insufficient capacity (step D6).

  If a free capacity capable of recording the received data amount cannot be secured in step D6, the data management unit 16 sets the difference between the erasable data amount and the insufficient capacity as a new insufficient capacity in comparison with step D5. (Step D7), the process returns to Step D2 to further specify the playlist to be deleted. If a free space capable of recording the received data amount can be secured in step D6, the data management unit 16 deletes the data file of the removable content specified in step D3 from the data file recording unit 121 (step D8), the free space securing process is terminated.

  As described above, according to the present embodiment, a playlist, which is a list of contents to be reproduced, is recorded in the playlist recording unit 122, and the data management unit 16 stores the data file in the content to be received. The total amount of data is specified as the amount of received data, it is determined whether there is a free capacity in the data file recording unit 121 that can record the specified amount of received data, and the free capacity that records the received data amount is the data file recording If it is determined that the playlist 121 does not exist, the playlist having the lowest priority among the playlists recorded in the playlist recording unit 122 is identified as the playlist to be deleted and described in the identified playlist to be deleted Configured to delete the data file of the stored content from the data file recording unit 121 Thus, it is possible to delete the content data file in unnecessary playlist units with a low priority to secure a free space, so that the data file recording unit 121 has a free space for recording the amount of content data to be received. If this is not the case, it is possible to secure a free space for recording the amount of data to be received without bothering the user and greatly reduce the burden on the user and the content transfer time. There is an effect.

  Furthermore, according to the present embodiment, the priority includes at least one of the recording date and time when the playlist is recorded, the last date and time when the playlist was most recently reproduced, and the number of times the playlist is reproduced. By configuring so that the deletion target playlist is specified using the rank determination information as the determination material, there is an effect that the deletion target playlist can be efficiently specified according to the reproduction status of the playlist.

  Furthermore, according to the present embodiment, any one of the recording date and time when the content is recorded, the last date and time when the content was most recently reproduced, and the number of times the content is reproduced, described in the playlist. By specifying the deletion target playlist using the priority order determination information including at least one as the determination material, the deletion target playlist can be efficiently specified according to the reproduction status of the content described in the playlist. There is an effect that can be.

  Furthermore, according to the present embodiment, by configuring the priority determination information including the user protection information for the playlist as the determination material to specify the deletion target playlist, regardless of the playback status of the playlist, There is an effect that the playlist protected by the user can be removed from the deletion target.

  Furthermore, according to the present embodiment, by configuring such that only the content not described in other playlists is deleted from the data file recording unit 121 among the content described in the deletion target playlist. The content data file can be deleted in units of unnecessary playlists with low priority without affecting other playlists.

  In the present embodiment, when there is insufficient content and the network 20 is connectable, all the content described in the playlist is sequentially played while performing the order change process. Although configured, the content in which the data file is recorded in the data file recording unit 121 may be sequentially reproduced in order, and the data file of the insufficient content may be collected in parallel with the reproduction. In this case, while reproducing the content in which the data file is recorded in the data file recording unit 121, the data file of the insufficient content is collected and the content in which the data file is recorded in the data file recording unit 121 After the end of playback, the insufficient content collected in the data file can be played back without delay. In addition, when there is insufficient content and it is in a state where it can be connected to the network 20, only the content in which the data file is recorded in the data file recording unit 121 is sequentially played back, and the shortage content in parallel with the playback. You may make it collect the data file of. In this case, when the same playlist is reproduced next time, the data files of all the contents described in the playlist are recorded in the data file recording unit 121.

  Further, in the present embodiment, the configuration is such that the playlist and the content list are compared after the playback instruction input for instructing playback of the playlist is performed. Compare the playlist with the content list over time, write the in-device address of the content in which the data file is recorded in the data file recording unit 121 to the playlist, and the content without the in-device address is insufficient You may make it recognize as a file list. In this case, since the comparison operation between the playlist and the content list can be omitted after the reproduction instruction input for instructing the reproduction of the playlist is performed, the time until the reproduction is started is shortened. Can do. However, in this case, when the data file recorded in the data file recording unit 121 is changed (added or deleted), it is necessary to compare the playlist with the content list again.

  It should be noted that the present invention is not limited to the above-described embodiments, and it is obvious that each embodiment can be appropriately changed within the scope of the technical idea of the present invention. In addition, the number, position, shape, and the like of the constituent members are not limited to the above-described embodiment, and can be set to a suitable number, position, shape, and the like in practicing the present invention. In each figure, the same numerals are given to the same component.

It is a block diagram which shows the structure of embodiment of the reproducing | regenerating apparatus based on this invention. It is a figure which shows the example of a playlist recorded on the playlist recording part shown in FIG. It is a figure which shows the example of a playlist management table currently recorded on the playlist recording part shown in FIG. It is a figure which shows the example of a content list recorded on the content list recording part shown in FIG. It is a flowchart for demonstrating the reproduction | regeneration operation | movement in embodiment of the reproducing | regenerating apparatus based on this invention. It is a figure which shows the example of a playlist after insufficient content collection recorded on the playlist recording part shown in FIG. It is a flowchart for demonstrating the reproduction | regeneration operation | movement performed with the insufficient content collection operation | movement in embodiment of the reproducing | regenerating apparatus based on this invention. It is explanatory drawing explaining the order change process at the time of reproduction | regeneration operation | movement in embodiment of the reproducing | regenerating apparatus which concerns on this invention. FIG. 3 is a flowchart for explaining an operation of collecting missing contents described in a missing file list recorded in a missing file list recording unit shown in FIG. 1. 3 is a flowchart for explaining a free space securing process for securing a free space in the data file recording unit shown in FIG. 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Playback apparatus 11 Transmission / reception part 12 Information recording part 13 Display part 14 Operation part 15 Reproduction | regeneration processing part 16 Data management part (Received data amount specific | specification means, free space determination means, deletion object playlist specific means)
DESCRIPTION OF SYMBOLS 20 Network 30 Content delivery server 40 Information processing apparatus 50 Headphone 121 Data file recording part 122 Playlist recording part 123 Content list recording part 124 Insufficient file list recording part

Claims (10)

A playback device that includes a data file recording unit that records a data file of content, reads the data file of the content from the data file recording unit, and plays back the data file;
A transmission / reception means for receiving the data file of the content via a network and recording it in the data file recording means;
Playlist recording means for recording a playlist which is a list of the contents to be reproduced;
Received data amount specifying means for specifying the total data amount of the data file in the content scheduled to be received by the transmitting / receiving means as a received data amount;
Free space determination means for determining whether or not there is free space in the data file recording means that can record the received data amount specified by the received data amount specifying means;
When the free space determining means determines that the free space for recording the received data amount does not exist in the data file recording means, the highest priority among the playlists recorded in the playlist recording means A deletion target playlist specifying means for specifying the playlist having a lower rank as a deletion target playlist;
And a data management unit that deletes the data file of the content described in the deletion target playlist specified by the deletion target playlist specifying unit from the data file recording unit. .   The deletion target playlist specifying means includes at least one of a recording date / time when the playlist was recorded, a final date / time when the playlist was most recently played back, and a playback count of the playlist. The playback apparatus according to claim 1, wherein the deletion target playlist is specified using priority order judgment information including judgment material.   The deletion target playlist specifying means includes a recording date and time when the content is recorded, a final date and time when the content was most recently reproduced, and the number of times the content is reproduced. The playback apparatus according to claim 1 or 2, wherein the deletion target playlist is specified using priority order determination information including at least one of them as a determination material.   4. The deletion target playlist specifying means specifies the deletion target playlist by using priority determination information including user protection information for the playlist as a determination material. Playback device.   The data management unit causes the data file recording unit to delete only the content that is not described in the other playlist among the content described in the deletion target playlist. Item 5. The playback device according to any one of Items 1 to 4. Data that has data file recording means for recording a data file of content, and that receives the data file of the content via a network to a playback device that reads the data file of the content from the data file recording unit and plays it back A receiving method,
Record a playlist that is a list of the content to be played,
Specifying the total amount of data of the data file in the content to be received as the amount of received data;
Determine whether the data file recording unit means has a free capacity to identify and record the received data amount;
When it is determined that there is no free space for recording the received data amount in the data file recording unit, the playlist having the lowest priority among the recorded playlists is specified as the playlist to be deleted. ,
A data receiving method, comprising: deleting the data file of the content described in the specified playlist to be deleted from the data file recording means.   Priority determination information including at least one of the recording date and time when the playlist is recorded, the final date and time when the playlist was most recently reproduced, and the number of times the playlist has been reproduced is used as a determination material The data receiving method according to claim 6, wherein the deletion target playlist is specified.   A priority order including at least one of the recording date and time when the content is recorded, the last date and time when the content was most recently played, and the number of times the content is played, which are described in the playlist The data receiving method according to claim 6 or 7, wherein the deletion target playlist is specified using determination information as a determination material.   9. The data receiving method according to claim 6, wherein the deletion target playlist is specified using priority determination information including user protection information for the playlist as a determination material.   10. The content that is not described in the other playlist among the content described in the playlist to be deleted is deleted from the data file recording unit. The data receiving method according to the above.

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