JP6054194B2 - Playlist creation device, playlist creation method, and program - Google Patents

Description

  The present invention relates to a technical field of a playlist creation device, a playlist creation method, and a program for creating a playlist including a plurality of contents.

  As this type of device, for example, a device that automatically creates a playlist by selecting a content suitable for a user from a plurality of contents (for example, music and moving images) is known. The playlist is created based on the similarity of various information (genre, tune, tempo, etc.) that the content has (see, for example, Patent Document 1).

JP 2002-333892 A

  However, in the technique such as Patent Document 1 described above, since a playlist is created according to information included in each content, there is almost no room for user selection regarding content selection. Further, when a playlist is created, the joints between the contents are closed up, and management as a whole playlist is not executed. Therefore, inconvenience may occur depending on the purpose of use of the playlist. For example, in applications such as DJ (Disc Jockey), the total playback time of a playlist is limited, so a creation method that simply connects contents is extremely inconvenient.

  The present invention has been made in view of the above-described problems, for example, and provides a playlist creation device, a playlist creation method, and a program capable of appropriately creating a playlist desired by a user. And

For the play-list creating devices of the present invention to solve the above problems, the key content determining means for determining at least one content user selected as the key content, at least one parameter the key content has, playlist a condition selection means for selecting as a setting condition for creating, based on the setting condition extracting a plurality of candidate contents, a list creation means for creating a plurality of the playlist including the key content and the candidate content The key content determination means includes a display unit, and the display unit displays a preview area for displaying the content being reproduced and its reproduction status on one screen, and the user selects the key content as the key content. A browse area displaying a plurality of candidate contents. When, and a play list structure area for displaying the play list created by the key content and the list creating means the user has selected.

For playlist creation process of the present invention is to solve the above problems, the key content determination step of determining at least one content user selected as the key content, at least one parameter the key content has, playlist a condition selection step of selecting as the setting condition for creating, based on the setting condition extracting a plurality of candidate contents, a list creation step of creating a plurality of the playlist including the key content and the candidate content In the key content determination step, display is performed on a display unit, and the display unit displays a preview area for displaying the content being played and its playback status on one screen, and the user uses the key content as the key content. A block that displays a plurality of candidate contents that can be selected. Comprising a Uzueria, a playlist configuration area in which the user views the play list created by the key content and the list generation step selected.

For the program of the present invention is to solve the above problems, a computer, a key content determination means for determining at least one content user selected as the key content, at least one parameter the key content has, playlist a condition selection means for selecting as a setting condition for creating, based on the setting condition extracting a plurality of candidate contents, as a plurality of said list creation means for creating a playlist that includes the key content and the candidate content As a display unit of the key content determination means, a preview area that displays the content being played and its playback status on a single screen, and a plurality of the user can select as the key content Bra that displays candidate content And Zueria, playlists configuration area for displaying the play list created by the key content and the list creating means the user has selected to display the.

  The effect | action and gain of this invention are clarified from the form for implementing invention demonstrated below.

It is a block diagram which shows the whole structure of the playlist production apparatus which concerns on an Example. It is a top view which shows the example of a display in the display part of the playlist production apparatus which concerns on an Example. It is a flowchart which shows operation | movement of the play list preparation apparatus concerning an Example. It is a conceptual diagram which shows the selection method of a key music. It is a graph (the 1) which shows the correlation coefficient for extracting the candidate music reproduced | regenerated between key music. It is a table | surface (the 1) which shows the correlation coefficient for extracting the candidate music reproduced | regenerated between key music. It is a conceptual diagram (the 1) which shows the extraction method of the candidate music in case BPM is set conditions. It is a graph (the 2) which shows the correlation coefficient for extracting the candidate music reproduced | regenerated between key music. It is a table | surface (the 2) which shows the correlation coefficient for extracting the candidate music reproduced | regenerated between key music. It is a conceptual diagram (the 2) which shows the extraction method of the candidate music in case BPM is set conditions. It is a flowchart which shows the extraction process of the candidate music in the playlist production apparatus based on an Example. It is a conceptual diagram which shows an example of the playlist produced using BPM as a setting condition. It is a conceptual diagram which shows an example of the play list produced by setting BPM and KEY as setting conditions. It is a conceptual diagram which shows an example of the play list produced by setting BPM or KEY as setting conditions. It is a conceptual diagram which shows the example of a display when the play list to be used is selected. It is a conceptual diagram (the 1) which shows the update method of a playlist when a new key music is added after creation of a playlist. It is a conceptual diagram (the 2) which shows the update method of a play list when a new key music is added after creation of a play list. It is a conceptual diagram which shows the update method of a playlist when the music which is not in a playlist is selected during reproduction | regeneration of a playlist. It is a conceptual diagram which shows an example of the play list containing the branch starting from a candidate music.

  In order to solve the above-described problem, the playlist creation device according to the present embodiment includes a key content determination unit that determines at least one content selected by a user as key content, and at least one parameter included in the key content. Condition selection means for selecting as setting conditions for creating a playlist, and list creation means for extracting a plurality of candidate contents based on the setting conditions and creating a plurality of playlists including the key contents and the candidate contents With.

  According to the playlist creating apparatus according to the present embodiment, a playlist including a plurality of contents is created. Here, the “play list” is a data group including various information related to reproduction, such as the content reproduction order and switching timing. “Content” refers to data that can be sequentially played back using a playlist, and includes video data as well as audio data such as music. Many contents are stored, for example, in a database or the like, and when a playlist is created, the contents to be included in the playlist are extracted from the playlist. Note that the content included in the playlist is not limited to the content held by the user, and may be content that can be reproduced in the future, such as content that can be purchased.

  When the playlist creating apparatus according to the present embodiment operates, first, at least one content selected by the user is determined as key content by the key content determination means. When the key content is determined, setting conditions for creating a playlist are selected by the condition selecting means. The selection of the setting condition is typically executed according to a user operation, but may be automatically executed by the apparatus. The setting condition is at least one parameter of the key content. For example, in addition to content-specific information such as BPM (Beats Per Minute), key, genre, artist name, release date, playback time, etc. Information set by the user such as the purchase date, or past reproduction information such as the number of times of reproduction and the number of times of connection with the previous song can be mentioned. The setting condition is used as a criterion for creating a playlist as will be described later. Therefore, it is preferable that the setting condition is a parameter that can be expressed as a numerical value. However, any information that can be compared with other contents can be used. It does not matter.

  When the setting condition is selected, the list creation unit extracts a plurality of candidate contents based on the setting condition. Extraction of candidate content is performed based on, for example, the similarity of parameters set as conditions for content to be played back and forth. More specifically, candidate content that is reproduced immediately after the key content is extracted as content whose parameters set as the setting conditions are close to the key content. In addition, other candidate content that is played back immediately after the extracted one candidate content is extracted as content whose parameters set as the setting conditions are close to the one candidate content.

  In addition, when a plurality of parameters are selected as setting conditions, extraction may be performed by judging the overall similarity to the plurality of parameters, or by judging the similarity separately for each parameter. May be performed. Further, the parameter set as the setting condition may be an average value of the entire content or may be a value of a specific part. For example, in the created playlist, the content and content before and after In the case where the playback is switched during the process, the value of the switching part may be used.

  When candidate content is extracted, a plurality of playlists including key content and candidate content are created by the list creation means. The plurality of playlists are created, for example, as indicating a plurality of routes whose reproduction paths branch based on one key content. When reproducing the content using the playlist, the user may select one desired playlist from the plurality of created playlists.

  As described above, according to the playlist creation device according to the present embodiment, even when a large amount of content exists, a playlist is suitably created by determining key content and selecting setting conditions. it can. In addition, since a plurality of playlists are created, the playlist to be played is finally determined with the user's intention interposed. Therefore, it is possible to realize reproduction with a playlist desired by the user.

  In another aspect of the playlist creation apparatus according to the present embodiment, the playlist creation apparatus further includes a total playback time setting unit that allows the total playback time of the playlist to be set.

  According to this aspect, for example, if the total playback time of the playlist is set in advance, the playlist is created so that the total playback time becomes the set value. Note that the total playback time may be set as the total playback time of the key content and the candidate content, or may be set as the total playback time of only the candidate content. Moreover, you may set as a range which has a certain amount of width instead of as one value. According to this aspect, since the total reproduction time of the playlist can be limited before creation, a playlist desired by the user can be created more suitably.

  In another aspect of the playlist creating apparatus according to the present embodiment, the list creating means creates the playlist by fixing the reproduction time of each of the candidate contents included in the playlist to a predetermined value.

  According to this aspect, for example, if the playback time of the candidate content is set in advance, a playlist that is played back with the playback time of each candidate content fixed to the set value is created. Note that the playback time of the key content may be fixed in the same manner as the candidate content. Further, the value set as the reproduction time may be set as a range having a certain width, not as one value. According to this aspect, since the reproduction time of each content is fixed to a predetermined value, the total reproduction time of the playlist can be easily adjusted according to the number of contents. Therefore, a playlist desired by the user can be created more suitably.

  In another aspect of the playlist creation device according to the present embodiment, the playlist creation device further includes playlist number setting means that allows the number of playlists created by the list creation means to be set.

  According to this aspect, for example, if the number of playlists is set in advance, the set number of playlists is created. Note that the value set as the number of playlists may be set not as a single value but as a range having a certain range. According to this aspect, since the number of playlists to be created can be limited before creation, the inconvenience of creating too many playlists or too few playlists can be avoided.

  In another aspect of the playlist creation device according to the present embodiment, the key content determination means can determine the new key content even after the playlist is created, and the list creation means Each time the key content is determined, the playlist is recreated.

  According to this aspect, when a new key content is determined after the playlist is created, the playlist is recreated each time. That is, extraction of candidate content corresponding to new key content is executed, and a playlist is created as including new key content and new candidate content. For this reason, even when the playlist desired by the user changes after creation of the playlist, or even when the desired playlist is not created, a new playlist can be quickly created according to the user's request. .

  The determination of new key content is performed, for example, when the user replaces or deletes existing key content and candidate content, or when new key content is added. Here, when the existing candidate content is replaced with another content, the replaced other content is determined as a new key content (that is, even if the candidate music is replaced as a target, it is replaced). Other content is content selected by the user, so it is treated as key content, not as candidate music). In addition, when the key content and the candidate content are deleted, the new key content does not increase, but the key content that has not been deleted is described as a new key content. Further, when only the candidate content is deleted, there is no change in the key content, so that the play list may not be recreated.

  The determination of new key content may be performed during playback using a playlist. In such a case, it is only necessary to create a playlist starting from the content currently being reproduced.

  In another aspect of the playlist creation device according to the present embodiment, the list creation means extracts the candidate content as content to be played between the key contents when a plurality of the key contents are determined.

  According to this aspect, for example, when the user selects two key contents, candidate contents are extracted so as to interpolate between the two selected key contents. That is, the playlist is created so that the selected key content is the content that is reproduced first and the content that is reproduced last. Similarly, when the user selects three or more key contents, candidate contents are extracted so as to interpolate between the key contents. That is, the playlist is created so that the selected key content is the content that is reproduced first, the content that is reproduced last, and the relay content.

  According to the above-described configuration, for example, if content (that is, key content) that is desired to flow at a predetermined timing is already determined, candidate content to be played between key content is automatically extracted. A playlist can be created very easily. This aspect is particularly effective in applications such as DJ.

  In the aspect in which the candidate content is extracted as the content to be played back between the key contents described above, the list creating means obtains the correlation obtained from the parameters set as the setting conditions in each of the first key content and the second key content. The candidate content to be reproduced between the first key content and the second key content may be extracted based on the number.

  In this case, before extracting candidate content, a correlation coefficient is first obtained from parameters that are set conditions for each of the first key content and the second key content. The “correlation coefficient” here is for deriving a parameter as a setting condition for candidate content to be reproduced between the first content and the second content, and is a relatively simple linear function. Or a more complex correlation. The correlation coefficient may be uniquely determined from the parameters set as the setting conditions for the first content to the second content, or may be appropriately selected from a plurality of different correlation coefficients. It may be. In this case, the user may be allowed to select a correlation function to be used. Or you may comprise so that a user can determine a correlation coefficient in detail.

  According to the configuration described above, extraction of candidate content to be played between a plurality of key contents can be more suitably performed. Therefore, a playlist desired by the user can be created more suitably.

  In order to solve the above-described problem, the playlist creation method according to the present embodiment includes a key content determination step of determining at least one content selected by a user as key content, and at least one parameter included in the key content. A condition selection step for selecting as a setting condition for creating a playlist, and a list creation step for extracting a plurality of candidate contents based on the setting condition and creating a plurality of playlists including the key content and the candidate content With.

  According to the playlist creation method according to the present embodiment, as with the playlist creation device described above, even when a large amount of content exists, it is preferable to determine key content and select setting conditions. Create playlists. In addition, since a plurality of playlists are created, the playlist to be played is finally determined with the user's intention interposed. Therefore, it is possible to realize reproduction with a playlist desired by the user.

  In order to solve the above problems, the program according to the present embodiment includes a key content determination unit that determines at least one content selected by a user as key content, and at least one parameter included in the key content. Condition selection means for selecting as setting conditions for creating a playlist, and list creation means for extracting a plurality of candidate contents based on the setting conditions and creating a plurality of playlists including the key contents and the candidate contents To function as.

  According to the program according to the present embodiment, as with the playlist creation apparatus and creation method described above, even when a large amount of content exists, it is preferable to determine key content and select setting conditions. Create playlists. In addition, since a plurality of playlists are created, the playlist to be played is finally determined with the user's intention interposed. Therefore, it is possible to realize reproduction with a playlist desired by the user.

  The playlist creation apparatus and playlist creation method according to the present embodiment, the operation of the program, and other gains will be described in more detail in the following examples.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Here, as an example of the playlist creation device of the present invention, a device that creates a playlist of music data will be described as an example.

<Device configuration>
First, the overall configuration of the playlist creation apparatus according to the present embodiment will be described with reference to FIG. FIG. 1 is a block diagram illustrating the overall configuration of the playlist creating apparatus according to the embodiment.

  In FIG. 1, a playlist creating apparatus 100 according to the present embodiment is configured to be able to create a playlist using song data acquired from a song database 200 storing many songs. Yes. Note that the music database 200 is typically configured to store a music group held by the user, but includes music that the user does not have at the present time (for example, music that can be obtained by charging). May be.

  The playlist creation device 100 is connected to a display unit 300 for displaying the created playlist. The display unit 300 also functions as an input unit that inputs a selection operation by the user when creating a playlist to the playlist creating apparatus 100.

  In particular, the playlist creation apparatus 100 according to the present embodiment includes a song data acquisition unit 110, a key song determination unit 120, a setting condition determination unit 130, a candidate song extraction unit 140, a playlist creation unit 150, a playlist determination unit 160, and A music data output unit 170 is provided.

  The music data acquisition unit 110 is configured to be able to acquire music data from the music database 200. Note that the music data acquired by the music data acquisition unit 110 is data used to create a playlist, and thus does not necessarily have to be data (for example, waveform data) for playing back music. The music data acquired by the music data acquisition unit 110 is output to the display unit 300 and displayed.

  The key music determination unit 120 is an example of the “key content determination unit” of the present invention, and the display unit 300 determines the music data selected by the user as the key music. The key music is an example of the “key content” of the present invention, and is a music used as a reference when creating a playlist. At least one key song is determined when the playlist is created. Information on the determined key music is output to the candidate music extraction unit 140.

  The setting condition determination unit 130 is an example of the “condition selection unit” of the present invention, and the display unit 300 determines the condition selected by the user as the setting condition. The setting condition is a condition for extracting candidate songs included in the playlist, and at least one setting condition is determined when the playlist is created. Information on the determined setting condition is output to the candidate music extraction unit 140.

  The candidate music extraction unit 140 extracts candidate music to be reproduced following the key music from the music data stored in the music database 200. The candidate music is an example of the “candidate content” in the present invention. The extraction of the candidate music is performed based on the setting condition determined by the setting condition determination unit 130. Information regarding the extracted candidate music is output to the playlist creation unit 150. The specific processing performed when the candidate music extraction unit 140 extracts candidate music will be described in detail later.

  The playlist creation unit 150 creates a plurality of playlists as including the key song determined by the key song determination unit 120 and the candidate song extracted by the candidate song extraction unit 140. The created playlist is output to the display unit 300 and displayed. The playlist creation unit 150 constitutes an example of the “list creation unit” of the present invention together with the candidate music extraction unit 140 described above.

  The playlist determination unit 160 determines one playlist selected by the user from among a plurality of playlists displayed on the display unit 300 as a playlist to be used for reproduction. Information regarding the playlist determined by the playlist determination unit 160 is output to the music data output unit 170.

The music data output unit 170 outputs music data to a playback device or the like based on the playlist determined by the playlist determination unit 160. Thereby, the key music and the candidate music included in the playlist are reproduced in the order determined in the playlist.

  Next, the display mode of the display unit 300 described above will be specifically described with reference to FIG. FIG. 2 is a plan view showing a display example on the display unit of the playlist creating apparatus according to the embodiment. In addition, the display mode here is only an example, and the display may be performed in a different mode.

  In FIG. 2, the display unit 300 according to the present embodiment is configured as a touch panel that allows input by direct touching by the user. However, the display unit 300 may be configured by a normal liquid crystal display or the like instead of the touch panel. In this case, input means such as a mouse and a keyboard are used to realize the user's selection operation. The display area of the display unit 300 is divided into three areas: a playlist configuration area A1, a browse area A2, and a preview area A3.

The playlist configuration area A1 is an area for displaying the created playlist, and displays a playlist playback stop button 405, key songs 410 and candidate songs 420 included in the playlist. In addition, although the key music 410 and the candidate music 420 here are displayed as icons including only characters, they may be displayed as images such as a CD jacket or artwork, for example. In the playlist configuration area A1, the key song 410 and the candidate song 420 are connected by an arrow indicating the playback order, and the playlist is displayed like a branched route. Since the playlist creation apparatus 100 according to the present embodiment may display a large number of playlists, it is difficult to display all the key songs 410 and candidate songs 420 in the playlist configuration area A1 at once. There is. For this reason, the second display area can be scrolled vertically and horizontally. Note that it may be possible to change to a display mode in which more music can be displayed at once.

The browse area A2 is an area for displaying a selectable song 430 that can be selected as the key song 410 by the user. That is, the browse area A2 displays the music data acquired by the music data acquisition unit 110 (see FIG. 1). Since the playlist creation apparatus 100 according to the present embodiment may handle a huge amount of music data, it is difficult to display all selectable music 430 in the browse area A2 at once. For this reason, the second display area can be scrolled vertically and horizontally. Note that it may be possible to change to a display mode in which more music can be displayed at once.

  The preview area A3 is an area for displaying the music being played and its playback status. In the preview area A3, a song information display unit 450 that displays a song 440 being played, a song name (Track 20 in the figure), and an artist name (Artist 20 in the figure), and a playback stop button for playing and stopping the song 460 and a playback state display unit 470 for showing a detailed playback state are arranged.

  It should be noted that each area of the playlist configuration area A1, the browse area A2, and the preview area A3 can be switched between display and non-display and can be expanded and reduced for each area.

<Description of operation>
Next, the overall operation of the playlist creation apparatus according to the present embodiment will be described with reference to FIG. FIG. 3 is a flowchart illustrating the operation of the playlist creating apparatus according to the embodiment. In the following, operations unique to the playlist creating apparatus according to the present embodiment will be described in detail, and other general operations will be omitted as appropriate.

  In FIG. 3, during the operation of the playlist creating apparatus 100 according to the present embodiment, first, music data is acquired from the music database 200 by the music data acquisition unit 110 (step S <b> 101). The acquired music data is output to the display unit 300 and displayed as a selectable music 430 in the browse area A2 as shown in FIG. 2 (step S102).

  A user who wants to create a playlist selects key music 410 from a plurality of selectable music 430. When the selection is performed by the user, the key music determination unit 120 determines the selected music as the key music 410.

  Here, the selection method of the key music 410 is demonstrated concretely with reference to FIG. FIG. 4 is a conceptual diagram showing a key music selection method. Hereinafter, a case where the user selects Track 20 as the key music will be described.

  In FIG. 4, the user touches the icon of the selectable music 430 displayed in the browse area A2 and drops it on the playlist configuration area A1, thereby selecting the key music 410. Alternatively, the key song 410 can be selected by touching the icon of the currently playing song 440 displayed in the preview area A3 and dropping it in the playlist configuration area A1. When a plurality of key songs 410 are to be selected, the key song 410 whose playback order is to be advanced is dropped on the left side of the playlist configuration area A1, and the key song 410 whose playback order is to be delayed is dropped on the right side of the first display area. What should I do?

  Returning to FIG. 3, when the key music piece 410 is determined, the setting condition determination unit 130 determines the condition selected by the user as the setting condition for creating the playlist (step S104). The setting condition is set as a parameter serving as a determination criterion in the extraction of candidate music 420 described later. Note that the setting condition may be determined as an initial setting before starting the playlist creation. That is, the timing for determining the setting condition is not limited to immediately after the determination of the key music 410.

  Parameters that can be selected by the user as setting conditions include, for example, BPM of music, key, genre, artist name, release date, track length (playback time), ranking, released country, rating, purchase date, playback count And the number of times of connection with the previous song (that is, the number of times extracted in the playlist). Of the parameters described above, the BPM, key, and track length can be obtained by analyzing music data, but other parameters may not be included in the music data.

  In addition to the setting conditions described above, the user can select the total playback time of the playlist, the number of songs included in the playlist, or the number of playlists created (that is, the number of routes). Note that if these conditions are not set, a playlist may be created without limitation. Therefore, even if the user does not select, it is required to set a predetermined upper limit value.

  Further, when the user selects a plurality of key music pieces 410, the user can also set a correlation coefficient used for extracting candidate music pieces 420 based on the setting conditions. Hereinafter, this correlation coefficient will be described in detail with reference to FIGS. FIG. 5 and FIG. 8 are graphs showing correlation coefficients for extracting candidate music to be reproduced between key music. FIG. 6 and FIG. 9 are tables showing correlation coefficients for extracting candidate music to be reproduced between key music. Further, FIGS. 7 and 10 are conceptual diagrams showing a method of extracting candidate music when BPM is set as a setting condition.

  In FIG. 5, when a plurality of key music pieces 410 are determined, candidate music pieces 420 are extracted as music pieces to be played between the key music pieces 410. Thus, for example, in the candidate music 420 played between the first key music and the second key music, the approximation rate of the parameters that are set conditions for the first key music and the second key music changes as shown in the figure. Extracted as That is, the candidate music 420 that is reproduced at a timing closer to the first key music is set so that the candidate music 420 that is reproduced at a timing closer to the first key music has a higher approximation rate of the setting condition with the first key music. The higher the approximation rate of the setting condition with the second key music, the higher the extraction rate. In this way, when performing playback using a playlist, extremely smooth switching of music is realized.

  In FIG. 6, for example, consider a case where a playlist including four candidate songs 420 is created between the first key song and the second key song. In this case, as the first candidate music to be reproduced next to the first key music, music having an approximation rate of 80 for the first key music and an approximation rate of 20 for the second key music is extracted. Similarly, as the second candidate music to be reproduced next to the first candidate music, music having an approximate rate of 60 for the first key music and an approximate rate of 40 for the second key music is extracted. As the third candidate music to be reproduced next to the second candidate music, music having an approximate rate of 40 for the first key music and an approximate rate of 60 for the second key music is extracted. As the fourth candidate music to be reproduced next to the third candidate music, music having an approximation rate of 20 for the first key music and an approximation rate of 80 for the second key music is extracted.

  In FIG. 7, for example, it is assumed that BPM is selected as the setting condition, the BPM of the first key music is 120, and the BPM of the second key music is 130. In this case, music having a BPM of 122 is extracted as the first candidate music. As the second candidate song, a song having a BPM of 124 is extracted. As the third candidate song, a song having a BPM of 126 is extracted. As the fourth candidate song, a song having a BPM of 128 is extracted.

  As shown in FIG. 8, the correlation coefficient may be a value based on a relatively complicated function. That is, a correlation coefficient other than the linear function correlation coefficient shown in FIG. 5 can be used.

  In FIG. 9, when the correlation coefficient shown in FIG. 8 is used, music having an approximation rate of 90 for the first key music and an approximation rate of 10 for the second key music is extracted as the first candidate music. Similarly, as the second candidate music piece, music having an approximation rate of 80 for the first key music and an approximation rate of 20 for the second key music is extracted. As the third candidate song, a song having an approximation rate of 60 for the first key song and an approximation rate of 40 for the second key song is extracted. As the fourth candidate song, a song having an approximation rate of 40 for the first key song and an approximation rate of 60 for the second key song is extracted.

  In FIG. 10, it is assumed that, as in FIG. 7, for example, BPM is selected as the setting condition, BPM of the first key music is 120, and BPM of the second key music is 130. In this case, as the first candidate song, a song having a BPM of 121 is extracted. As the second candidate song, a song having a BPM of 122 is extracted. As the third candidate song, a song having a BPM of 124 is extracted. As the fourth candidate song, a song having a BPM of 126 is extracted.

  Returning to FIG. 3 again, when various conditions such as the setting condition are set as described above, the candidate music extraction unit 140 performs the extraction process of the candidate music 420 (step S105). When the candidate music 420 is extracted, the playlist creating unit 150 creates a plurality of playlists including the key music 410 and the candidate music 420 (step S106). The plurality of created playlists are output to the display unit 300 and displayed in the playlist configuration area A1 as shown in FIG. That is, it is displayed as a plurality of routes branching to a plurality of candidate songs 420 with the key song 410 as a reference. The user selects one playlist to be used from the plurality of playlists displayed in this way.

When a playlist is selected by the user, the playlist determination unit 160 determines the selected playlist as a playlist to be used (step S107). Then, the music data output unit 170 sequentially outputs music data corresponding to the determined playlist (step S108). Thus, a series of processes of the playlist creating apparatus 100 according to the present embodiment is completed.

  Next, the extraction process of the candidate song 420 that is particularly related to the present invention among the processes described above will be described in detail with reference to FIG. FIG. 11 is a flowchart illustrating the candidate music extraction process in the playlist creation device according to the embodiment.

  In FIG. 11, when the extraction process of the candidate music 420 is started, it is first determined whether or not music data having a setting condition exists in the music database 200 (step S201). That is, it is determined whether or not there is a song having the parameter selected as the setting condition. Parameters that can be set conditions include parameters that do not necessarily exist in the music data, as described above. For this reason, when there is no music data including the parameter set as the setting condition, the extraction process based on the setting condition cannot be executed. Therefore, when there is no music data having the setting condition (step S201: NO), an error message is displayed on the display unit 300 (step S211), and the series of processing ends.

  On the other hand, when there is music data having setting conditions (step S201: YES), points are calculated for each music data according to the setting conditions. The point here is calculated as a value indicating how much each piece of music data is suitable for the candidate song 420, and a higher point is calculated for a song closer to the setting condition of the candidate song 420 to be extracted. When a plurality of parameters are selected as setting conditions, the total value of points calculated for each parameter may be used.

  When the points are calculated, it is determined whether or not the points of the high-order music data having a high point have the same value among a plurality of points (step S203). Here, when the points do not have the same value among the music data with higher points (step S203: NO), the music data with the highest point is extracted as the candidate music 420 (step S209). On the other hand, when the points have the same value (step S203: YES), there are a plurality of music data having the highest points. Therefore, in such a case, in addition to the setting conditions, the parameters of the music that was not selected as the setting conditions are set as new conditions. Note that priorities are automatically assigned to parameters that can be selected as setting conditions, and when a new condition is set, a parameter with a higher priority is set as a new condition.

  The priority of each parameter is, for example, in order from the highest, BPM, key, genre, rating, number of connections with the previous song, number of times played, artist name, release date, ranking, track length, country of release, Set as music purchase date. Such priorities are typically set automatically, but may be set by the user.

  When a new condition is set, it is first determined whether or not there is a music piece having the new condition, as in the processing so far (step S205). Here, when there is no music having a new condition (step S205), a parameter with a lower priority is set as a new condition (step S206), and the process of step S205 is repeated. On the other hand, when there is music data having a new condition (step S205: YES), points are calculated for each music data according to the new condition. The point here is calculated as a value indicating how much each piece of music data is suitable for the candidate music 420, similarly to the point calculated using the setting conditions described above.

  When the points are calculated, it is determined whether or not the points of the high-order music data having a high point have the same value among a plurality of points (step S208). If the point is not the same value among the music data with higher points (step S208: NO), the music data with the highest point is extracted as the candidate music 420 (step S209). On the other hand, when the points have the same value (step S208: YES), there are a plurality of music data having the highest points. Therefore, in such a case, new conditions are set again (step S206).

  As described above, even if the candidate song 420 cannot be extracted with only one setting condition, the candidate song 420 is appropriately set by sequentially setting parameters that were not selected as the setting condition as new conditions. Can be extracted. If a parameter such as a song name that cannot be duplicated with other songs is set as a parameter having the lowest priority, a situation in which points have the same value can be reliably prevented. That is, the candidate music 420 can be extracted reliably.

  When the candidate music 420 is extracted, it is determined whether or not the number of candidate music 420 satisfies the set number of paths (in other words, the number of playlists) (step S210). If it is determined that the set number of routes is not satisfied (step S210: NO), the processing after step S203 is started again. Note that the process in this case is executed in a state where music data that has already been extracted as the candidate music 420 is excluded. By repeating such extraction processing, a plurality of candidate songs 420 are extracted. When the set number of routes is satisfied (step S210: YES), the series of processes ends.

  Next, a plurality of playlists created as a result of the candidate music 420 extraction process described above will be specifically described with reference to FIGS. FIG. 12 is a conceptual diagram illustrating an example of a playlist created using BPM as a setting condition, and FIG. 13 is a conceptual diagram illustrating an example of a playlist created using BPM and KEY as a setting condition. FIG. 14 is a conceptual diagram illustrating an example of a playlist created using BPM or KEY as a setting condition. FIG. 15 is a conceptual diagram illustrating a display example when a playlist to be used is selected.

In the example shown below, a case is considered in which the first key music 410 a serving as the start point and the second key music 410 b serving as the end point are determined as the key music 410 .

  In FIG. 12, it is assumed that, for example, the setting condition is set to BPM, and the condition that two playlists with two candidate songs 420 are created is set. In this case, the calculation of the point based on the BPM is first performed, and the music having the highest point (in other words, the music having the most suitable BPM to be played immediately after the first key music 410a) It is extracted as a candidate song 420a. Subsequently, a song having the second highest point (in other words, a song having a BPM suitable to be played immediately after the first key song 410a after the candidate song 420a) is extracted as the candidate song 420b.

  When two candidate songs are extracted (that is, only for the set route), the calculation of the points based on the BPM is performed again, and the song having the highest point (in other words, played immediately after the candidate song 420a). The music having the most suitable BPM) is extracted as the candidate music 420c. Similarly, a song having the second highest point (in other words, a song having a BPM suitable to be played immediately after the candidate song 420a after the candidate song 420c) is extracted as the candidate song 420d.

  As described above, by displaying the music with higher points at each stage on the upper side, it is possible to display the playlist with higher overall points conspicuously. That is, it is possible to propose a playlist more suitably for the user. In addition to or instead of the method of changing the display position described above, for example, a method of changing the size, color, movement, etc. of the display icon may be used.

  In FIG. 13, for example, it is assumed that a condition for creating two playlists in which the number of candidate songs 420 is two is set using the BPM and key as the setting condition. In this case, first, calculation of points based on BPM and point calculation based on keys is executed, and the total value of points based on BPM and points based on keys is calculated for each piece of music data. . Then, the music having the highest point is extracted as the candidate music 420a. Subsequently, the music having the second highest point is extracted as the candidate music 420b.

  When two candidate songs are extracted, the point calculation based on the BPM and the point calculation based on the key are executed again, and the total of the points based on the BPM and the points based on the key is performed for each piece of music data. A value is calculated. Then, the music having the highest point is extracted as the candidate music 420c. Similarly, the music having the second highest point is extracted as the candidate music 420d.

  In FIG. 14, for example, it is assumed that a condition is set such that a playlist with two candidate songs 420 is created one by one using the setting condition as BPM or key. In this case, first, the calculation of points based on BPM is executed, and the music having the highest point is extracted as the candidate music 420a. Subsequently, points are calculated again based on the BPM, and the music having the highest point is extracted as the candidate music 420c.

  When a playlist based on BPM is created, points are calculated based on the key, and the music having the highest point is extracted as a candidate music 420b. Subsequently, points are calculated again using the key as a reference, and the music having the highest point is extracted as the candidate music 420d.

  As described above, even when a plurality of setting conditions are set, when a playlist is created for each of the setting conditions, the process of extracting candidate songs 420 may be performed separately.

  In FIG. 15, a plurality of playlists created as described above are determined as playlists to be used for reproduction by being selected by the user. The route determined as the playlist to be used for reproduction is highlighted so that it can be visually discriminated. For example, as shown in the drawing, the icon borders and arrows of the candidate music 420 are displayed thickly. On the other hand, for the playlist that is not used for reproduction (that is, the playlist that has not been selected), the icon borders and arrows of the candidate music 420 are displayed lightly. Alternatively, it may be deleted.

  Incidentally, the playlist may be changed after creation. Hereinafter, the change of the playlist after creation will be described with reference to FIGS. FIGS. 16 and 17 are conceptual diagrams showing a playlist updating method when a new key music is added after the playlist is created. FIG. 18 is a conceptual diagram showing a playlist update method when a music piece not in the playlist is selected during playback of the playlist.

  In FIG. 16, it is assumed that, for example, after the playlist shown in FIG. 12 is created, the third key music 410c is added as the key music 410 to be played after the second key music 410b. In this case, new candidate songs 420e and 420f are extracted as candidate songs 420 to be played between the second key song 410b and the third key song 410c. Note that the playlist that has already been created between the first key song 410a and the second key song 410b is not changed. The number of candidate songs 420 and the number of routes newly extracted between the second key song 410b and the third key song 410c can be set as appropriate.

  In FIG. 17, for example, after the play list shown in FIG. 12 is created, it is assumed that the third key music 410c is added as the key music 410 played between the first key music 410a and the second key music 410b. In this case, new candidate songs 420g and 420h are extracted as candidate songs 420 to be played between the first key song 410a and the third key song 410c. Also, new candidate songs 420i and 420j are extracted as candidate songs 420 to be played between the third key song 410c and the second key song 410b.

  As described above, when the key music piece 410 is added, the playlist update method differs depending on the addition position. When the key music 410 is deleted, the playlist as shown in FIGS. 16 and 17 is updated to the playlist as shown in FIG. The playlist is also updated when the key music 410 is replaced.

In FIG. 18, the play list may be changed during the reproduction. For example, assume that the user changes the song to be played next to 420a while playing the first key song 410a in the playlist shown in FIG. In this case, the candidate music 420a is newly treated as a key music, and 420c, 410d, and 420k are extracted as candidate music to be played after the candidate music 420a. Here, different numbers of candidate songs are extracted for the route for playing the candidate songs 420c and the routes for playing the candidate songs 410d and 420k, but the same number of candidate songs 420 are extracted. (For example, the candidate music 420k may not be extracted, and other candidate music may be extracted after the candidate music 420c). That is, the number of candidate songs 420 to be extracted can be set as appropriate.

Thus, if the playlist can be updated even during playback, it is possible to create the playlist more preferably reflecting the user's will. Although the route branches only from 410, the route branching may be performed with the candidate music 420 as a starting point. Hereinafter, the playlist that branches off from the candidate music 420 will be described in detail with reference to FIG. FIG. 19 is a conceptual diagram showing an example of a playlist including a branch starting from a candidate song.

  In the playlist shown in FIG. 19, the route branches from not only the key music 410 but also the candidate music 420c and the candidate music 420f. For this reason, the route that passes through the candidate music 420c includes the route that plays the candidate music 420c, the candidate music 420e, and the candidate music 420g in this order, the route that plays the candidate music 420c, the candidate music 420f, and the candidate music 420g, and the candidate. There are three routes that are reproduced in the order of the song 420c, the candidate song 420f, and the candidate song 420h.

  Thus, by allowing branching from the candidate music 420, it becomes possible to create a playlist more flexibly.

  As described above, according to the playlist creating apparatus 100 according to the present embodiment, it is possible to appropriately create a playlist desired by the user.

  In the above-described embodiment, the device for creating a playlist of music data has been described. However, if the content is such that a playlist can be created by setting conditions, the present invention is similarly applied. It is possible to apply a playlist creation device. Specifically, the playlist creation device of the present invention can also be configured as a device that creates a playlist of video data.

  The present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit or idea of the invention that can be read from the claims and the entire specification, and a playlist can be created with such a change. An apparatus, a playlist creation method, and a program are also included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 100 Playlist creation apparatus 110 Music data acquisition part 120 Key music determination part 130 Setting condition determination part 140 Candidate music extraction part 150 Playlist creation part 160 Playlist determination part 170 Music data output part 200 Music database 300 Display part 410 Key music 405 Play list playback stop button 420 Candidate music 430 Selectable music 440 Playing music 450 Music information display section 460 Playback stop button 470 Playback status display section A1 Playlist configuration area A2 Browse area A3 Preview area

Claims (9)

Key content determination means for determining at least one content selected by the user as key content;
At least one parameter the key content has a condition selection means for selecting as a setting condition for creating a playlist,
Based on the setting condition extracting a plurality of candidate contents, and a list creation means for creating a plurality of the playlist including the key content and the candidate content, the key content determining means has a display unit,
The display unit is on one screen,
A preview area that displays the content being played and its playback status;
A browse area for displaying the plurality of candidate contents that the user can select as the key contents;
A playlist creation device comprising: a playlist configuration area for displaying the key content selected by the user and the playlist created by the list creation means.   The playlist creation apparatus according to claim 1, further comprising a total playback time setting unit that enables setting of the total playback time of the playlist.   The playlist creation unit according to claim 1 or 2, wherein the list creation unit creates the playlist by fixing a reproduction time of each of the candidate contents included in the playlist to a predetermined value. apparatus.   The playlist creation device according to any one of claims 1 to 3, further comprising a playlist number setting unit that enables setting of the number of playlists created by the list creation unit. The key content determination means can determine the new key content even after the playlist is created,
The playlist creation device according to any one of claims 1 to 4, wherein the list creation unit re-creates the playlist every time the key content is determined.   6. The list creating unit according to claim 1, wherein when a plurality of key contents are determined, the list creating unit extracts the candidate contents as contents to be reproduced between the key contents. 7. Playlist creation device.   The list creation means is configured to determine whether the first key content and the second key content are based on a correlation coefficient obtained from the parameter set as the setting condition in each of the first key content and the second key content. The playlist creation apparatus according to claim 6, wherein the candidate content to be played back is extracted. A key content determination step of determining at least one content selected by the user as key content;
At least one parameter the key content has a condition selection step of selecting as the setting condition for creating a playlist,
Based on the setting condition extracting a plurality of candidate contents, and a list generation step of generating a plurality of the playlist including the key content and the candidate content and display on the display unit in the key content determining step Done
The display unit is on one screen,
A preview area that displays the content being played and its playback status;
A browse area for displaying the plurality of candidate contents that the user can select as the key contents;
A playlist creation method comprising: the key content selected by the user; and a playlist configuration area for displaying the playlist created in the list creation step. Computer
Key content determination means for determining at least one content selected by the user as key content;
At least one parameter the key content has a condition selection means for selecting as a setting condition for creating a playlist,
With extracts a plurality of candidate contents, to function as a list creation means for creating a plurality of the playlist including the key content and the candidate contents based on the setting condition,
As a display part of the key content determination means, on one screen,
A preview area that displays the content being played and its playback status;
A browse area for displaying the plurality of candidate contents that the user can select as the key contents;
A program that displays the key content selected by the user and a playlist configuration area that displays the playlist created by the list creation means.

Images