JP2010257368A - Content information display control device and program for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To quickly display a music file when music selected in an artist mode is selected when changing the artist mode in which a music list is displayed on the basis of an artist tree to a ranking mode in which music information is displayed on the basis of a ranking tree. <P>SOLUTION: In playing the music in the artist mode, the number of playback times of music to play is updated, music are then sorted in order of the number of playback times, and order of music to play in the number of playback times is stored. Thus, when the artist mode is changed to the ranking mode, the ranking tree is quickly generated, and the music list is displayed when a cursor is displayed in the music played. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a content information display control apparatus for displaying a list of content information based on a content information tree and a program thereof.

  A large number of contents (for example, song files) are recorded on a storage medium such as an HDD, and a content playback apparatus that reads and plays a song file from the HDD is provided. The content playback apparatus lists the playback mode in which the tree structure does not change unless the number of content recorded in the HDD is increased or decreased, such as artist mode, album mode, track mode, etc. There is a ranking mode in which the order changes each time content is played and the tree structure changes.

  In artist mode, when the song list is displayed based on the artist tree and the cursor is displayed on the currently playing (or selected) song file, the playback mode is changed from artist mode to album mode. When the music list is displayed based on the album tree, the cursor can be displayed on the music file selected in the artist mode by the following method.

  FIG. 11 shows the artist tree on the left and the album tree on the right. In the artist mode, it is assumed that the music file specified by the content ID (3, 1, 4) in the artist tree is selected and the cursor is displayed. It is specified that the address of the node of the artist tree specified by the content ID (3, 1, 4) is 0x9223. For both the artist tree and the album tree, a node table indicating the correspondence between the node address and the song file dBID is held. The dBID corresponding to the node address 0x9223 is specified from the node table of the artist tree. Next, the node address 0x9231 corresponding to the specified dBID is specified from the node table of the album tree. That is, for the selected music file, conversion from the address of the node of the artist tree to the address of the node of the album tree is executed. Next, in the album tree, the node is specified from the address, and the content ID (4, 21, 8) of the specified node is specified. As a result, when displaying the music list based on the album tree, the cursor can be displayed on the music file specified by the content ID (4, 21, 8).

  As described above, when the playback mode is changed, in order to select the song file selected in the playback mode before the change in the song list in the playback mode after the change and display the cursor, The tree and node address of the playback mode are necessary. However, if the ranking tree structure changes each time a song file is played as in the ranking mode, the CPU load increases if the ranking tree and node table are regenerated each time a song file is played. Generally, it is not held when it is not in the ranking mode. Therefore, after changing to the ranking mode, a ranking tree is generated, a node table is generated, and then the content ID conversion process is executed as described above. Therefore, based on the song list in the changed playback mode There is a problem that it takes a lot of processing time to select a music file and display a cursor.

  Also, by using the above method, in the artist mode, a music list based on the artist tree can be displayed and at the same time a music list based on the album tree can be displayed. However, as described above, in the artist mode, since the ranking tree is not held, the song list cannot be displayed based on the ranking tree at the same time that the song list is displayed based on the artist tree.

  In order to generate a ranking tree in the ranking mode, the music files are sorted in the order of the number of times of reproduction, the music files having the highest number of times of reproduction are extracted, and the ranking tree is generated based on the extracted music file identification information. Need to be generated. Therefore, when changing from the artist mode to the ranking mode, it takes a long time to generate the ranking tree, and as a result, it takes a long time to display the song list based on the ranking tree. .

JP 2005-507133 A

  One object of the present invention is to display a list of content information based on a second content information tree in which the content is sorted in the order of the number of playbacks from the first state in which the list of content information is displayed based on the first content information tree. It is to provide a content information display control device capable of quickly displaying a list of contents in a state in which the content selected in the first state is selected when changing to the second state to be displayed. .

  Another object of the present invention is to display a list of content information based on the first content information tree in the first state where the list of content information is displayed based on the first content information tree, and To provide a content information display control device capable of displaying a list of contents based on a second content information tree in which contents are sorted in order.

  Another object of the present invention is to display a list of content information based on a second content information tree in which the contents are sorted in the order of the number of playbacks from the first state in which the list of content information is displayed based on the first content information tree. By providing a content information display control device capable of quickly generating a second content information tree and displaying a list of content based on the second content information tree when changing to the second state to be displayed. is there.

  The present invention is to solve at least one of the above three correlated problems.

  A content information display control apparatus according to a preferred embodiment of the present invention is based on a first state in which a list of content information is displayed based on a first content information tree and a second content information tree in which the contents are sorted in the order of the number of times of reproduction. A second state in which a list of content information is displayed, and when the selected content is played back in the first state, the number of playbacks of the content to be played back is updated, and then the content is sorted in order of the number of playbacks. A rank storage means for storing the order of the number of reproductions of the content to be played, and a second content information tree generated when changing from the first state to the second state, and stored in the rank storage means In a state where the content specified by the ranking is selected, the content information is based on the second content information tree. And a display control means for displaying the list.

  In the first state, when the content is reproduced, the number of reproductions of the content to be reproduced is updated, and then the content is sorted in order of the number of reproductions, and the order of the reproduction number of the content to be reproduced is obtained and stored. That is, when the second content information tree is generated, the location where the currently reproduced content is located in the second content information tree is calculated and stored in advance. Thereby, when changing from the first state to the second state, after generating the second content information tree, it is possible to quickly display the content list in a state where the content being reproduced is selected.

  The content information display control apparatus according to another preferred embodiment of the present invention includes a first state in which a list of content information is displayed based on the first content information tree, and a second content information tree in which the contents are sorted in the order of the number of times of reproduction. A second state in which a list of content information is displayed, and when the selected content is played back in the first state, the number of playbacks of the content to be played back is updated, and then the content is sorted in order of the number of playbacks. Sorting storage means for storing the order of the order of the number of playback times of the content to be played back, and in the first state, in the state where the content being played back is selected based on the first content information tree A list is displayed and content specified by the rank stored in the rank storage means is In-option state, and a display control means for displaying a list of content information based on the second content information tree.

  In the first state, when the content is reproduced, the number of reproductions of the content to be reproduced is updated, and then the content is sorted in order of the number of reproductions, and the order of the reproduction number of the content to be reproduced is obtained and stored. That is, the location where the currently reproduced content is located in the second content information tree is calculated and stored. As a result, in the first state, the content list is displayed with the content being reproduced selected based on the first content information tree, and at the same time, the content being reproduced based on the second content information tree is displayed. A list of contents can be displayed in a selected state.

  In a preferred embodiment, the apparatus further includes a reproduction determination unit that determines whether or not the content to be reproduced has been changed. When the content to be reproduced is changed, the rank storage unit determines the number of times the content has been changed. After that, the contents are sorted in the order of the number of times of reproduction, and the ranking of the changed contents in the order of the number of times of reproduction is stored.

  In this case, each time the content to be reproduced is changed, the location where the content being reproduced is located in the second content information tree can be calculated and stored.

  In a preferred embodiment, the storage device further comprises node storage means for storing a correspondence relationship between a node address of the first content information tree and content identification information, and the rank storage means includes the first content of the content to be reproduced. Identifying the address of the node in the information tree, storing the identification information of the content with the highest number of reproductions in the memory, identifying the identification information of the content corresponding to the address of the identified node, The order of the number of reproduction times stored in the memory is stored as the order of the number of reproduction times of the content to be reproduced.

  A content information display control device according to still another preferred embodiment of the present invention includes a first state in which a list of content information is displayed based on the first content information tree, and a second content information tree in which the contents are sorted in the order of the number of times of reproduction. A second state in which a list of content information is displayed on the basis of the content information. When the selected content is played back in the first state, the number of playbacks of the content to be played back is updated. And ranking storage means for storing the identification information of the content for the upper predetermined number of times of reproduction, and the contents stored by the ranking storage means when changing from the first state to the second state. The identification information is used to generate the second content information tree, and based on the generated second content information tree. And a display control means for displaying a list of content information Te.

  In the first state, when the content is reproduced, the number of reproductions of the content to be reproduced is updated, and then the contents are sorted in the order of the number of reproductions, and the identification information of the content having the highest number of reproductions is stored. That is, if the second content information tree is generated, content identification information included in the second content information tree is stored in advance. As a result, when changing from the first state to the second state, the second content information tree is generated based on the identification information of the content whose stored number of reproductions is the upper predetermined number. A content information tree can be generated, and a list of content can be quickly displayed based on the second content information tree.

  In a preferred embodiment, the apparatus further includes a reproduction determination unit that determines whether or not the content to be reproduced has been changed. When the content to be reproduced is changed, the rank storage unit determines the number of times the content has been changed. After that, the contents are sorted in the order of the number of reproductions, and the identification information of the contents corresponding to the upper predetermined number of reproductions is stored.

  In this case, each time the content to be reproduced is changed, the identification information of the content to be included in the ranking tree can be stored again.

  According to the present invention, from the first state in which the list of content information is displayed based on the first content information tree, the list of content information is displayed based on the second content information tree in which the contents are sorted in the order of the number of times of reproduction. When changing to the two states, it is possible to quickly display a list of content information in a state where the content selected in the first state is selected.

  According to the present invention, in the first state in which the list of content information is displayed based on the first content information tree, the content information list is displayed based on the first content information tree, and the content is displayed in the order of the number of times of reproduction. The content information can be displayed based on the second content information tree that is sorted.

  According to the present invention, from the first state in which the list of content information is displayed based on the first content information tree, the list of content information is displayed based on the second content information tree in which the contents are sorted in the order of the number of times of reproduction. When changing to the second state, a second content information tree can be quickly generated and a list of contents can be displayed based on the second content information tree.

1 is a block diagram illustrating a content reproduction apparatus according to a preferred embodiment of the present invention. (A) is a figure which shows content information DB, (b) is a figure which shows the state which sorted content information DB in order of the frequency | count of reproduction | regeneration. It is a figure which shows an artist tree. It is a figure which shows a ranking tree. It is a figure which shows the node table of an artist tree. It is a figure which shows the music list displayed in artist mode. It is a flowchart which shows the content information display control process of CPU1. It is a figure which shows the music list displayed in ranking mode. It is a figure which shows the music list displayed in artist mode. It is a flowchart which shows the content information display control process of CPU1. It is a flowchart which shows the content information display control process of CPU1. It is a figure which shows a dBID table. It is a figure which shows the process which converts from an artist tree to an album tree.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings. However, the present invention is not limited to these embodiments.

  FIG. 1 is a block diagram showing a content playback apparatus (hereinafter referred to as playback apparatus) 100 according to a preferred embodiment of the present invention. The playback device 100 includes a CPU 1, a RAM 2, a ROM 3, a content storage unit 4 such as an HDD, a playback unit 5, a display unit 6, and an operation unit 7. These are connected to each other via a bus. In addition, a speaker (not shown) is connected to the reproduction unit 5. The content is a general term for video (image) data and / or audio (music, music) data, but in this example is a music file (also called a track).

  A plurality of music files are recorded on the HDD 4. The music file recorded in the HDD 4 is read according to an instruction from the CPU 1, and reproduction processing (for example, decoding processing, D / A conversion, amplification processing, etc.) is executed by the reproduction unit 5. The music signal reproduced by the reproducing unit 5 is supplied to the speaker, and sound is output.

  The HDD 4 stores a content information database (hereinafter referred to as a content information DB) shown in FIG. In the content information DB, content information of a plurality of categories is stored for all song files recorded in the HDD 4. The content information of a plurality of categories includes metadata such as artist name, album name, song name, dBID, and the number of times of reproduction. The dBID is identification information indicating a music file and is given when the music file is recorded in the HDD 4. The number of times of reproduction indicates the number of times of reproduction of the music file, and is increased by 1 when, for example, the reproduction of the music file is started or the reproduction is completed.

  The display unit 6 displays a song list which is a list of contents information (song title, artist name, album name, etc.) of the song file, and is an LCD (liquid crystal display), an FL tube, or the like. The operation unit 7 receives a user operation, and is an operation button, a remote control transceiver, or the like. When the user operates the operation unit 7 and refers to the song list displayed on the display unit 6 to select a song file to be played, the playback unit 5 plays the selected song file. When the reproduction unit 5 finishes reproducing the selected song file, the reproduction unit 5 selects and reproduces the next song file in the song list.

  The CPU 1 controls the entire playback device 100, and reads out and executes a program (for example, a content information display control program) stored in the ROM 3 or the HDD 4 into the RAM 2 to execute a content information display control process described later. Execute.

  The playback apparatus 100 is provided with a plurality of playback modes. The reproduction mode indicates which content information is first used to select a music file from among a plurality of categories of content information when selecting a music file. For example, the playback mode includes an artist mode, an album mode, a track mode, a ranking mode, and the like.

  In artist mode, a list of artist names is first displayed in alphabetical order and / or alphabetical order. One artist name is selected from one or more artist names, and then the selected artist name is selected. This is a playback mode in which one album name is selected from one or more specified album names, and then one song name is selected from one or more song names specified by the selected album name. . In album mode, a list of album names is first displayed in alphabetical order and / or alphabetical order. One album name is selected from one or more album names, and then the selected album name is selected. This is a playback mode in which one song title is selected from one or more specified song titles. The track mode is a playback mode in which a list of song names is first displayed in alphabetical order and / or alphabetical order, and one song name is selected from one or more song names. The ranking mode is a playback mode in which a list of song names is first displayed in order of the number of times of reproduction, and one song name is selected from one or more song names.

  When selecting a music file in each playback mode, the CPU 1 generates a tree corresponding to each category. For example, when selecting a music file in the artist mode, the CPU 1 generates an artist tree (first content information tree) shown in FIG. When selecting a music file in the ranking mode, the CPU 1 generates a ranking tree (second content information tree) shown in FIG. Similarly, an album tree (first content information tree) is generated in the album mode, and a track tree (first content information tree) is generated in the track mode.

  The tree is information temporarily generated in the RAM 2 to generate a music list that is a list of music files, and has a plurality of hierarchical structures (four hierarchies in this example). The tree includes nodes in a root hierarchy, a Folder hierarchy, an Album hierarchy, and a Track hierarchy in order from an upper hierarchy, and a number (a number starting from 0 or 1) is assigned to a node in each hierarchy. The root hierarchy indicates which category of content information the tree is related to. The number of the root hierarchy is, for example, 3 for the artist tree, 4 for the album tree, 5 for the track tree, and 9 for the ranking tree.

  The Folder hierarchy is a hierarchy indicating, for example, artist names. In the artist tree of FIG. 3, the number of the artist A node is 1 and the number of the artist B node is 2. In the ranking tree of FIG. 4, the number of the folder hierarchy node is always fixed to 1. In the album tree and the track tree, narrowing down by artist name is not performed, so the node in the Folder hierarchy is not used.

  The Album hierarchy is a hierarchy indicating album names. In the artist tree of FIG. 3, the node of album A-1 is number 1, the node of album A-2 is number 2, and the node of album B-1 Is 1. That is, numbers are assigned in order from 1 for album names branched from the same artist name. For example, when there are ten album names of artist C, numbers 1 to 10 are assigned to the respective album name nodes. In the ranking tree of FIG. 4, the number of the nodes in the Album hierarchy is always fixed to 1. In the album tree, a number is assigned to each node in order regardless of the artist name. In the track tree, the album hierarchy is not used because the album name is not narrowed down.

  The Track hierarchy is a hierarchy indicating a song name. In the artist tree of FIG. 3, the node of the track A-1-1 has the number 1, the node of the track A-1-2 has the number 2, and the track The node A-1-7 has the number 7, the node of the track A-2-1 has the number 1, the node of the track B-1-1 has the number 1, and the track B-1-2 The number of the node is 2. That is, numbers are assigned in order from 1 to the song names branched from the same album name. For example, when there are 13 song titles of album C, numbers 1 to 13 are assigned to the respective song title nodes. In the ranking tree of FIG. 4, song names are sorted in the order of the number of playbacks (for example, descending order), and numbers are assigned to each node in order from 1. For example, the number of the node of the track A-1-3 is 1, the number of the node of the track A-1-7 is 2, and the number of the node of the track B-2-1 is 3. In the album tree, numbers are assigned to the song name nodes branched from the album names in order from 1. In the track tree, the song names are sorted in alphabetical order and alphabetical order, and numbers are assigned to the song name nodes in order from 1. The

  A content ID is assigned to each song file using the numbers assigned to the nodes in each hierarchy of the tree. That is, if the number in the root layer is a, the number in the Folder layer is b, the number in the Album layer is c, and the number in the Track layer is d, the content ID is represented by (a, b, c, d). For example, in the artist tree of FIG. 3, track A-1-1 is (3, 1, 1, 1), track A-1-2 is (3, 1, 1, 2), and track A -1-7 is (3, 1, 1, 7), track A-2-1 is (3, 1, 2, 1), and track B-1-1 is (3, 2, 1, 1) and the track B-1-2 is (3, 2, 1, 2). In the ranking tree of FIG. 4, track A-1-3 is (9, 1, 1, 1), track A-1-7 is (9, 1, 1, 2), and track B-2 −1 is (9, 1, 1, 3). Thus, even for the same song name, the content ID differs depending on the tree that is generated.

  The CPU 1 stores the dBID of the music file in the node area of the Track hierarchy of each tree stored in the RAM 2. Further, the CPU 1 registers a correspondence relationship between the address of the node in the Track hierarchy of each tree and the dBID stored in the node in the node table in the RAM 2. FIG. 5 shows a node table in the artist tree. For example, the address 0x9223 of the node of the artist tree means that a music file with a dBID of 453 is pointed out.

  The CPU 1 changes from the playback mode (first state) in which the tree structure is not changed unless the music file recorded in the HDD 4 is increased or decreased, such as artist mode (or album mode, track mode), etc. by user operation, ranking mode, etc. When the song mode is changed to the playback mode (second state) in which the tree structure is changed each time the song file is played, the artist name is selected from the displayed song list and the song name displayed on the cursor is displayed. In the song list displayed in the changed ranking mode, it is possible to quickly select and display the cursor.

  Specifically, when playing the selected song file in the artist mode, the CPU 1 updates the number of times of reproduction in the content information DB of the song file to be reproduced, and then sorts and reproduces the song files in order of the number of times of reproduction. The order of the number of reproduction times of the music file is stored in the RAM 2 in advance. As a result, when the artist mode is changed to the ranking mode, the ranking list is generated, and then the song list specified by the rank stored in the RAM 2 is selected from the song list, thereby displaying the song list in the ranking mode. When you do, you can quickly select the song file that was selected in the artist mode and display the cursor.

  In the playback apparatus 100 having the above configuration, display processing when the artist mode (the same applies to the album mode and the track mode) is changed to the ranking mode will be described.

  FIG. 6 is a diagram showing a song list displayed in the artist mode. FIG. 7 is a flowchart showing the processing of the CPU 1. First, when an artist mode is selected by a user operation (S1), a song list is generated based on the artist tree and displayed as shown in FIG. In FIG. 6, four song names of artist A and album A-1 (tracks A-1-1-1 to A-1-4) are displayed, and other song names are scrolled and displayed when the cursor is moved. The The four displayed song names correspond to the song names having content IDs (3, 1, 1, 1) to (3, 1, 1, 4) in the artist tree of FIG.

  In FIG. 6, for example, when a track A-1-2 is selected (a cursor is displayed) and a reproduction instruction is input, the CPU 1 reads the track A-1-2 from the HDD 4 and causes the reproduction unit 5 to start reproduction ( S2). The CPU 1 specifies the content ID of the music file to be reproduced from the artist tree and holds it in a variable pID (present Content ID) in the RAM 2. Here, since the track A-1-2 is being reproduced, the content ID (3, 1, 1, 2) is held in the pID with reference to the artist tree of FIG.

  Next, the CPU 1 updates the number of reproductions so that the number of reproductions of the music file being reproduced is increased by 1 in the content information DB (S4). For example, if the number of reproductions of track A-1-2 is 40, the number of reproductions of track A-1-2 is updated to 41 as shown in FIG.

  When the number of playbacks is updated, the ranking of the number of playbacks may change, and the structure of the ranking tree may be changed. Therefore, the CPU 1 reads a predetermined number of dBIDs from the content information DB in the descending order of the number of reproductions (descending order) and holds them in buf [] in the RAM 2 (S5). The predetermined number is the number of songs in the song list generated based on the ranking tree, and is 10, for example. Specifically, the content information DB of FIG. 2A is sorted in descending order of the number of reproductions as shown in FIG. Then, the dBIDs of the music files with the highest ranking of the number of playbacks are read out in order of the number of playbacks, and stored in buf []. Here, dBIDs 1250, 88, 123,.

  The CPU 1 specifies the address of the node in the artist tree corresponding to the pID held in S3, further specifies the dBID corresponding to the node address with reference to the node table of FIG. 5, and sets this dBID as the artdbID ( S6). Here, with reference to FIG. 5, 161 is specified as artdbID as the dBID corresponding to pID (3, 1, 1, 2).

  Next, the CPU 1 determines whether or not there exists a dBID that matches the artdbID in buf [] (S7). That is, it is determined whether or not the music file currently being reproduced in the artist mode exists in the ranking tree after the number of reproductions has been updated.

  If there is no dBID that matches artdbID in buf [] (NO in S7), the process proceeds to S9. On the other hand, if there is a dBID that matches the artdbID in buf [] (YES in S7), the CPU 1 acquires the ranking of the matching dBID in buf [] and substitutes it into the variable num (S8). That is, the music file currently being played back in the artist mode is checked and stored in the ranking tree in the descending order of the number of playbacks. Here, since the dBID is 161, 9 is held in the variable num as the order of the number of reproductions.

  In the artist mode, the CPU 1 determines whether or not the currently played song ends playing (or in response to the user's song selection instruction or skip instruction) and advances the song to be played to the next song. (S9). When the music to be reproduced is advanced to the next music (YES in S9), the process returns to S2 and the above processing is executed again. That is, every time a song to be reproduced in the artist mode is changed, the number of reproductions is updated, and the number of reproductions in the descending order of the number of reproductions in the ranking tree is stored.

  On the other hand, when the music to be reproduced cannot be advanced to the next music (NO in S9), the CPU 1 determines whether or not the reproduction mode is changed from the artist mode to the ranking mode by a user operation (S10). If the playback mode is not changed (NO in S10), the process returns to S9. On the other hand, when the reproduction mode is changed to the ranking mode (YES in S10), the CPU 1 generates a ranking tree shown in FIG. 4 (S11). The CPU 1 generates and displays a music list based on the ranking tree, selects a music file whose content ID is specified by (9, 1, 1, num), and displays a cursor. Here, since num = 9, the cursor is displayed on the music file identified by the content ID (9, 1, 1, 9). That is, as shown in FIG. 8, a song list based on the ranking tree (a list of songs in order of descending number of reproductions) is displayed, and a cursor is displayed on the track A-1-2 in which the number of reproductions is the ninth. ing. In FIG. 8, the song names (9, 1, 1, num-3) to (9, 1, 1, num + 1) are displayed in the song list.

  As described above, when the cursor is displayed on the track A-1-2 in the music list based on the artist tree as shown in FIG. 6, when the ranking mode is changed, the ranking tree as shown in FIG. Since the cursor is displayed on the track A-1-2 that is the same music file in the music list based on the music file, the user can easily understand the music file selection operation. Further, by storing the ranking of the song file to be selected in the ranking tree, the cursor can be quickly displayed in the song list.

  Next, another preferred embodiment of the present invention will be described. In this example, when a music file is being reproduced in the artist mode, a music file based on the artist tree can be displayed, and at the same time, a music list based on the ranking tree can be displayed. In this example, the ranking tree shown in FIG. 4 is always held in the RAM 2 in order to display a song list based on the ranking tree even in the artist mode. FIG. 9 is a diagram showing a song list displayed in the artist mode. The left side is a song list based on an artist tree, and the right side is a song list based on a ranking tree. In the artist mode, when the track A-1-2 is selected and reproduced, the same track A-1-2 is selected in the song list based on the ranking tree and a cursor is displayed. Therefore, it is possible to know the order of the number of times of reproduction in the ranking mode of the music file being reproduced.

  FIG. 10 is a flowchart showing the processing of the CPU 1. First, when an artist mode is selected by a user operation (S21), a song list based on the artist tree is displayed as shown on the left side of FIG. 9 (S22). On the left side of FIG. 9, for example, when track A-1-2 is selected, a cursor is displayed, and a playback instruction is input, CPU 1 reads track A-1-2 from HDD 4 and causes playback unit 5 to start playback ( S22). The CPU 1 specifies the content ID of the music file being played from the artist tree and holds it in the variable pID (S23). Here, since the track A-1-2 is being reproduced, the content ID (3, 1, 1, 2) is held in the pID.

  Next, the CPU 1 updates the number of reproductions so as to increase the number of reproductions of the music file being reproduced by 1 in the content information DB (S24). For example, if the number of reproductions of track A-1-2 is 40, the number of reproductions of track A-1-2 is updated to 41 as shown in FIG.

  When the number of playbacks is updated, the structure of the ranking tree may be changed. Therefore, the CPU 1 reads out a predetermined number of dBIDs from the content information DB in the descending order of the number of reproductions (descending order), and stores them in the Track hierarchy nodes of the ranking tree in order from the top (from the node with the number 1). (S25). Specifically, first, the content information DB of FIG. 2A is sorted in descending order of the number of reproductions as shown in FIG. Then, the dBIDs of the music files having the highest number of reproductions are read out in this order and are held in order in the nodes of the Track hierarchy of the ranking tree. Here, dBIDs 1250, 88, 123,.

  The CPU 1 specifies the address of the node in the artist tree corresponding to the pID held in S23, further specifies the dBID corresponding to the address of the node with reference to the node table of FIG. 5, and sets it as artdbID (S26). Here, with reference to FIG. 5, 161 is specified as artdbID as the dBID corresponding to pID (3, 1, 1, 2).

  Next, the CPU 1 determines whether or not a dBID that matches the artdbID exists in a node in the Track hierarchy of the ranking tree (S27). That is, it is determined whether or not the music file currently being reproduced in the artist mode exists in the ranking tree after the number of reproductions has been updated.

  If there is no dBID that matches artdbID in the node of the Track tree of the ranking tree (NO in S27), the song file currently being played in the artist mode is not included in the song list based on the new ranking tree. Therefore, the CPU 1 generates a new ranking tree and redisplays the music list based on the ranking tree, but cannot select a music file and hides the cursor (S30).

  On the other hand, if a dBID that matches the artdbID exists in a node in the Track hierarchy of the ranking tree (YES in S27), the CPU 1 obtains a number in the node in the Track hierarchy of the ranking tree of the matching dBID and substitutes it in the variable num (S28). That is, the music file currently being played back in the artist mode is checked and stored in the ranking tree in the descending order of the number of playbacks. Here, since the dBID is 161, the dBID is held in the node whose number is 9 in the Track hierarchy of the ranking tree, and 9 is held in the variable num as the order of the number of reproductions.

  The CPU 1 generates a ranking tree shown in FIG. 4, displays a music list based on the ranking tree, selects a music file whose content ID is specified by (9, 1, 1, num), and displays a cursor. For example, in the song list, song names of five song files (9, 1, 1, num-3) to (9, 1, 1, num + 1) are displayed. Here, since num = 9, the cursor is displayed on the music file identified by the content ID (9, 1, 1, 9). That is, as shown on the right side of FIG. 9, a song list based on the ranking tree (a song list in the descending order of the number of reproductions) is displayed, and a cursor is displayed on the track A-1-2 having the ninth highest reproduction number. Has been.

  In the artist mode, the CPU 1 determines whether or not the currently played song ends playing (or in response to the user's song selection instruction or skip instruction) and advances the song to be played to the next song. (S31). When the music to be reproduced is advanced to the next music (YES in S31), the process returns to S22 and the above process is executed again. In other words, every time a song to be played in artist mode is changed, the number of plays is updated, and the currently played song file is stored in the ranking tree in the descending order of the number of times played. Reconstruct, redisplay the song list based on the ranking tree, and display the cursor on the currently playing song file.

  As described above, when a song file is being played in the artist mode, a song list based on the artist tree can be displayed at the same time, and a song list based on the ranking tree can be displayed. The cursor can be displayed on the currently playing music file.

  Next, still another preferred embodiment of the present invention will be described. In this example, when the artist mode is changed to the ranking mode, a ranking tree is quickly generated and a song list based on the ranking tree is displayed.

  FIG. 11 is a flowchart showing the processing of this example. First, when an artist mode is selected by a user operation (S41), a song list is generated based on the artist tree and displayed as shown in FIG. In FIG. 6, four song names of artist A and album A-1 (tracks A-1-1-1 to A-1-4) are displayed, and other song names are scrolled and displayed when the cursor is moved. The The four displayed song names correspond to the song names having content IDs (3, 1, 1, 1) to (3, 1, 1, 4) in the artist tree of FIG.

  In FIG. 6, for example, when track A-1-2 is selected (cursor is displayed) and a playback instruction is input, CPU 1 reads track A-1-2 from HDD 4 and causes playback unit 5 to start playback ( S42). The CPU 1 updates the number of reproductions so that the number of reproductions of the music file being reproduced is increased by 1 in the content information DB (SS43). For example, if the number of reproductions of track A-1-2 is 40, the number of reproductions of track A-1-2 is updated to 41 as shown in FIG.

  When the number of playbacks is updated, the ranking of the number of playbacks may change, and the structure of the ranking tree may be changed. Therefore, the CPU 1 reads a predetermined number of dBIDs from the content information DB in the descending order of the number of reproductions (descending order), and stores them in the dBID table (see FIG. 12) in the RAM 2 (S44). The predetermined number is the number of songs in the song list generated based on the ranking tree, and is 10, for example. Specifically, the content information DB of FIG. 2A is sorted in descending order of the number of reproductions as shown in FIG. Then, the dBIDs of the music files having the highest number of reproduction times are read out in the order of the number of reproductions and stored in the dBID table. Here, dBIDs 1250, 88, 123,... 3412 are read out and stored in the dBID table.

  In the artist mode, the CPU 1 determines whether or not the currently played song ends playing (or in response to the user's song selection instruction or skip instruction) and advances the song to be played to the next song. (S45). When the music to be reproduced is advanced to the next music (YES in S45), the process returns to S42 and the above processing is executed again. That is, every time a song to be played back in the artist mode is changed, the number of playbacks is updated, the song files are sorted in descending order of the number of playbacks, and the top 10 dBIDs are stored in the dBID table.

  On the other hand, when the music to be reproduced cannot be advanced to the next music (NO in S45), the CPU 1 determines whether or not the reproduction mode is changed from the artist mode to the ranking mode by a user operation (S46). If the playback mode is not changed (NO in S46), the process returns to S45. On the other hand, when the reproduction mode is changed to the ranking mode (YES in S46), the CPU 1 generates a ranking tree shown in FIG. 4 (S47, S48). Specifically, a fixed node of the ranking tree (each node in the root hierarchy, the Folder hierarchy, and the Album hierarchy in the ranking tree of FIG. 4) is generated (S47). Subsequently, the CPU 1 generates Track nodes of the ranking tree in FIG. 4 for the number of rows in the dBID table (that is, the number of songs in the ranking tree), and causes each Track node to hold the dBIDs in the dBID table in order. In FIG. 12, since the dBID table has 10 rows, 10 Track nodes are generated and the dBID is registered.

  Subsequently, the CPU 1 generates and displays a song list based on the ranking tree (S49 to S51). Specifically, the CPU 1 specifies the content ID of the music file to be displayed in the music list (S49). For example, content IDs (9, 1, 1, 1) to (9, 1, 1, 5) are specified. Next, CPU1 reads dBID from the node of the ranking tree specified by content ID (S50). For example, dBIDs of 1250, 88, 123, 166, and 803 are read out. Finally, the CPU 1 reads content information (for example, song name) corresponding to the read dBID from the content information DB, generates a song list, and displays it (S51).

  As described above, in the artist mode, the dBID table necessary for generating the ranking tree is held, so when changing from the artist mode to the ranking mode, based on the dBID registered in the dBID table, A ranking tree can be quickly generated, and a song list can be displayed based on the ranking tree. That is, after the artist mode is changed to the ranking mode, it is not necessary to sort the music files in the order of the number of times of reproduction or to execute the dBID extraction processing of the top ten music files, and the processing becomes quick. In the artist mode, since the ranking tree is not held, the ranking tree is regenerated every time the music file to be reproduced is changed, and the load on the CPU 1 can be prevented from increasing.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment. The playback apparatus 100 may not include the HDD 4 and may play back content recorded on a memory card inserted from the outside, or play back content acquired from a server via a network. The ranking tree may be a tree sorted in ascending order of the number of reproductions (ascending order). The order in which the number of reproductions is large or small may be the number of reproductions in a predetermined period (for example, six months), or may be the cumulative number of reproductions after the music file is recorded in the HDD 4. The present invention may be provided in the form of a computer program for operating the content reproduction apparatus or a recording medium on which the computer program is recorded.

  The present invention can be suitably applied to a content reproduction apparatus, a PC, or the like provided with a storage medium such as an HDD.

100 content playback device 1 CPU
2 RAM
3 ROM
4 HDD
5 Playback section 6 Display section 7 Operation section

Claims (7)

A first state in which a list of content information is displayed based on a first content information tree; and a second state in which a list of content information is displayed based on a second content information tree in which the contents are sorted in order of the number of times of reproduction. ,
In the first state, when the selected content is reproduced, the number of reproductions of the content to be reproduced is updated, then the content is sorted in the order of the number of reproductions, and the order storage of the order of the number of reproductions of the content to be reproduced is stored. Means,
When changing from the first state to the second state, a second content information tree is generated, and the content specified by the rank stored in the rank storage means is selected, and the second content is selected. A content information display control device comprising: display control means for displaying a list of content information based on an information tree. A first state in which a list of content information is displayed based on a first content information tree; and a second state in which a list of content information is displayed based on a second content information tree in which the contents are sorted in order of the number of times of reproduction. ,
In the first state, when the selected content is reproduced, the number of reproductions of the content to be reproduced is updated, then the content is sorted in the order of the number of reproductions, and the order storage of the order of the number of reproductions of the content to be reproduced is stored. Means,
In the first state, based on the first content information tree, a list of content information is displayed in a state where the content being played back is selected, and specified by the order stored in the order storage means. A content information display control device comprising: display control means for displaying a list of content information based on the second content information tree in a state where content to be selected is selected. It further includes a reproduction determination means for determining whether or not the content to be reproduced has been changed,
When the content to be reproduced is changed, the order storage means updates the number of times the content has been changed, then sorts the content in order of the number of times of reproduction, and stores the order of the content in the order of the number of times of reproduction after the change. The content information display control apparatus according to claim 1 or 2. Node storage means for storing a correspondence relationship between the node address of the first content information tree and the content identification information;
The rank storage means specifies the address of the node in the first content information tree of the content to be played back, stores the identification information of the content having the highest number of playbacks in the memory, and corresponds to the address of the specified node The content identification information is specified, and the order of the number of reproductions stored in the memory of the specified identification information is stored as the order of the number of reproductions of the content to be reproduced. Content information display control device. A first state in which a list of content information is displayed based on a first content information tree; and a second state in which a list of content information is displayed based on a second content information tree in which the contents are sorted in order of the number of times of reproduction. ,
In the first state, when the selected content is played back, the number of playback times of the content to be played back is updated, then the content is sorted in order of the number of playback times, and the identification information of the content with the highest number of playback times is stored. Order ranking storage means,
When changing from the first state to the second state, the second content information tree is generated using the content identification information stored in the rank storage means, and the generated second content information A content information display control device comprising: display control means for displaying a list of content information based on a tree. It further includes a reproduction determination means for determining whether or not the content to be reproduced has been changed,
When the content to be reproduced is changed, the rank storage means updates the number of times the content has been changed, and then sorts the content in order of the number of times of reproduction. The content information display control device according to claim 5, wherein the content information display control device is stored.   A content information display control program for causing a computer to execute each means of the content information display control device according to claim 1.

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