JP5679840B2 - Playlist creation device, playlist editing device - Google Patents

Playlist creation device, playlist editing device Download PDF

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JP5679840B2
JP5679840B2 JP2011017418A JP2011017418A JP5679840B2 JP 5679840 B2 JP5679840 B2 JP 5679840B2 JP 2011017418 A JP2011017418 A JP 2011017418A JP 2011017418 A JP2011017418 A JP 2011017418A JP 5679840 B2 JP5679840 B2 JP 5679840B2
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playlist
relevance
content
contents
editing
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JP2012160796A (en
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広和 海江田
広和 海江田
晃一 中川
晃一 中川
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三菱電機株式会社
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  The present invention relates to a playlist creation device and a playlist editing device, and more particularly to a technique for creating and editing a playlist that defines a display order of contents to be displayed on digital signage.

  An advertising medium that utilizes digital technology for display and communication and displays images and information on a flat display or projector is called digital signage. This includes train vision, street vision, and digital photo frames.

  Digital materials such as moving images, still images, and animations are digital photo frame contents. A playlist that defines the display order (transition order) of such a plurality of contents is called a playlist.

  Conventional playlist creation means creates a playlist that satisfies the constraint conditions of each content such as the scheduled number of times of display, content that cannot be displayed simultaneously, and the display time zone (for example, Patent Document 1). There is also a method of creating a playlist based on user evaluation and input (for example, Patent Document 2).

JP 2010-87836 A JP 2007-150764 A

  However, such a playlist creation means does not consider the relationship between contents, and there is a problem that the relationship between contents cannot be effectively used for a playlist.

  Furthermore, since the created playlist is displayed in a table format, there is a problem that it is difficult for the user to grasp the relationship between contents when editing the playlist.

  In view of the above-described problems, an object of the present invention is to provide a playlist creation device that creates a playlist in consideration of the relationship between contents, and a playlist editing device that can easily grasp the relationship between contents.

The playlist creation device of the present invention is a playlist creation device that creates a playlist as a playback order of a plurality of contents made of digital material, the relationship calculation means for calculating the relationship between the contents, Playlist creation means for creating the playlist based on relevance , the relevance calculation means calculates the relevance between the contents using the relevance of the keyword associated with the content, the relevance of the keyword is , Ru determined based on the search hits in the case of search using the search engine.

  The playlist editing apparatus of the present invention is a playlist editing apparatus that edits a playlist as a playback order of a plurality of contents made of digital material, and each of the contents constituting the playlist is replaced with a node, Playlist visualization means for arranging the nodes such that the distance between the nodes is inversely proportional to the relationship between the contents indicated by the nodes, and creating a graph in which a directed edge is drawn between the nodes; A display device for displaying the graph on a screen, an input device for inputting a user operation for editing a directed edge between the nodes of the graph displayed on the display device on the screen, and the user operation Playlist editing means for editing the playlist.

  In the playlist creation device of the present invention, the playlist creation means creates a playlist based on the relevance between the contents, so that it is possible to improve the advertising effect due to the synergy effect.

  Also, the playlist editing apparatus of the present invention replaces each content constituting the playlist with a node, and the distance between the nodes is inversely proportional to the relevance between the contents indicated by the nodes. And a playlist visualization means for creating a graph with a directed edge between the nodes, a display device for displaying the graph on a screen, and between the nodes of the graph displayed on the display device Since the input device for inputting a user operation for editing the directed edge of the screen on the screen and the playlist editing means for editing the playlist according to the user operation, the user can easily relate to the contents. You can evaluate and edit the playlist while grasping it.

1 is a block diagram illustrating a configuration of a playlist creation device according to Embodiment 1. FIG. 6 is a flowchart showing an operation of the playlist creation apparatus according to Embodiment 1; FIG. 10 is a diagram illustrating a method for calculating a relationship between keywords in the playlist creation device according to Embodiment 1; It is a figure which illustrates the relevance information stored in a relevance information storage means. It is a schematic diagram of a spring model. It is an arrangement plan of nodes in a spring model. FIG. 6 is a layout diagram of nodes with a directed edge in a spring model. It is a figure explaining the change of the transition order of the content using the node arrangement | positioning figure.

(Embodiment 1)
<Configuration>
FIG. 1 is a block diagram showing the configuration of the playlist creation apparatus according to Embodiment 1. This playlist creation device has a function as a playlist creation device for editing a playlist created by itself or a playlist input from the outside, in addition to a function as a playlist creation device for creating a playlist.

  The playlist creation device includes an arithmetic processing device 10, an input device 20, and a primary storage device 30, a storage device 40, and a display device 50 in which target data to be processed by the arithmetic processing device 10 is temporarily stored. The input device 20 is a device used by a user to input necessary instructions to the arithmetic processing device 10, and the arithmetic processing device 10 creates or edits a playlist according to the instructions of the input device 20.

  The arithmetic processing device 10 reads various data stored in the storage device 40 to the primary storage device 30, and then performs various calculations in calculating relevance between contents, creating playlists, visualizing playlists, and editing playlists. For example, a computer device. Various calculation results are also stored in a predetermined storage area of the primary storage device 30. A playlist graph created or edited by the arithmetic processing unit 10 is displayed on the display unit 50.

  The arithmetic processing apparatus 10 includes parameter setting means 11, content information input means 12, relevance calculation means 13, playlist creation means 14, and playlist editing means 15.

  The parameter setting unit 11 sets various parameters including the number of playlists to be created based on data input from the input device 20.

  The content information input unit 12 selects content to be used for creating a playlist based on data input from the input device 20. The content used here is stored as content information 41 in the storage device 40. In the content information 41, each content is stored together with a display time and a keyword associated with the content.

  The relevance calculation means 13 refers to the various parameters set by the parameter setting means 11 and the content information 41 and calculates relevance (details will be described later) between the contents. The calculated relationship between the contents is stored in the storage device 40 as the relationship information 42.

  The playlist creation unit 14 creates a playlist based on the relationship between the contents calculated by the relationship calculation unit 13. The created playlist is stored in the storage device 40 as playlist information 43.

  The playlist visualization unit 16 expresses the playlist created by the playlist creation unit 14 in a graph format based on the relationship between the contents calculated by the relationship calculation unit 13 and outputs it to the display device 50. .

  The playlist editing means 15 edits the playlist according to the input information from the input device 10.

<Operation>
FIG. 2 is a flowchart showing operations of playlist creation and playlist editing performed by the playlist creation device of the present invention. Hereinafter, the operation of the playlist creating apparatus of the present invention will be described with reference to FIG.

  First, the parameter setting means 11 sets the number of playlists to be created, the search engine used for calculating relevance, the threshold value for the number of data, and the like according to the input data of the input device 20 (step S1). Search engines and thresholds will be described later.

  Next, the content information input means 12 inputs content information (step S2). Specifically, based on the input data of the input device 20, the content used for creating the playlist is selected from the content information 41.

  Next, the relevance calculation means 13 calculates the relevance between the contents selected by the content information input means 12 in step S2 (step S3).

  Hereinafter, a method for calculating the relationship between contents will be described. For example, the relevance between the contents is calculated using the relevance of the keyword associated with the content. The keyword may be registered in the content information 41 in a state associated with each content in advance or may be input by the content information input unit 12.

  The relationship between the keyword a and the keyword b is calculated using the search engine set by the parameter setting unit 11 as follows. Here, the search engine searches for data related to a keyword from a plurality of data. For example, it is possible to use a search engine such as Google (registered trademark) or Yahoo! (registered trademark) via a web service.

  | A | is the number of search hits when only the keyword a is searched using the search engine, | b | is the number of search hits when only the keyword b is searched using the search engine, and the keyword a and the keyword b are AND searched. In this case, the number of search hits is expressed as | a∩b |. At this time, the relationship r (a, b) between the keyword a and the keyword b is calculated by the equation (1) using the Simpson coefficient.

  However, α is a threshold value for the number of search hits, and is set by the parameter setting means. If α is small, the relevance can be calculated even if the number of search hits is small, but the reliability is low. Conversely, if α is large, the reliability of the relevance increases, but the search engine needs to have a sufficient number of data. Therefore, α is determined in consideration of the balance between the number of data of the search engine and the reliability of the relevance.

  In addition, you may make it determine the relationship between keywords by methods other than Formula (1). As a method other than the equation (1), for example, a co-occurrence frequency, a Dice coefficient, a Jaccard coefficient, a Cosine similarity, and the like can be used.

  FIG. 3 shows an example of calculating the relationship between the keywords a and b using the formula (1) when the keyword a is “travel” and the keyword b is “bag”. FIG. 3 shows that the number of search hits for “travel” alone is 25600, the number of search hits for “bag” alone is 12800, and the number of search hits for AND search for “travel” and “bag” is 6400. Yes. In this case, the relationship r (travel, bag) between “travel” and “bag” is calculated as follows using equation (1). However, α <6400.

The relationship between content X and content Y is calculated as follows using equation (1). X 1, x 2 to the content X, ..., n number of keywords x n, y 1 to the content Y, y 2, ..., m-number of keywords y m is assumed to be registered. At this time, when the same number of keywords are registered in each content (when n = m), the relationship R (X, Y) between the content X and the content Y is expressed by the following equation using the equation (1). Calculate with

  Further, when the number of keywords set for each content X and Y is an arbitrary number of f or more (when n ≧ f, m ≧ f, and n ≠ m are permitted), the content X and the content Y Relevance R (X, Y) is calculated by the following equation using equation (1).

  The expression (4) is obtained by calculating the maximum value of the relevance r between each keyword registered in the content X and each keyword registered in the content Y, and the relevance R (X, Y between the content X and the content Y). ).

  In Expression (3), when it is possible to set an appropriate keyword for each content, relevance with higher reliability than Expression (4) can be calculated. However, when even one inappropriate keyword is included, the reliability of relevance decreases. In Expression (4), if f = 1 and at least one appropriate keyword is set for each content, the reliability of relevance does not decrease even if another inappropriate keyword is set. However, since the relevance between the contents is calculated based on one keyword, the reliability of the relevance is inferior compared with the case where all the appropriate keywords are set and the relevance is calculated by Expression (3). Therefore, formula (3) and formula (4) may be properly used according to the cost and quality of keyword setting.

  Alternatively, instead of considering only the maximum value in Equation (4), a method such as an intermediate solution between Equation (3) and Equation (4) is selected in which the top three sums are related to each other. May be.

  The relevance between the contents calculated by the relevance calculating means 13 by the method as described above is stored in the relevance information 42 in a table format as shown in FIG. For example, the value “0.3” shown in the cell in the second row and the third column in FIG. 4 indicates the relationship R between the content 1 and the content 2 calculated using the formula (3) or the formula (4). Show.

  Returning to FIG. 2, after the relevance calculation means 13 calculates the relevance between contents, the play list creation means 14 creates a play list based on the relevance between the contents stored in the relevance information 42. (Step S4).

  It should be noted that the playlist targeted by the present invention is a circulation type that repeats display from the first content again after ii) displays the last content, even if i) finishes displaying the registered content once. It doesn't matter. Here, the playlist i) is called a non-loop playlist, and the playlist ii) is called a loop playlist.

  Here, a case where one playlist that displays each of n contents once is created will be described as an example (in the case of a loop type playlist, each content is displayed once in one loop). Point). The number n of contents is set by the parameter setting means 11. Note that the total display time of each content does not exceed the playable upper limit time of the playlist.

There are n P 1 (n factorial) combinations of combinations in which n contents are displayed once, that is, playlists. The total sum sumR is calculated for each of the n P 1 playlists based on the relevance information 42. Here, the sum of relevance refers to the sum of relevance with content arranged before and after each content. For example, in the case of a playlist displayed in the order of “content 1 → content 2 → content 3 → content 4 → content 5 → content 6”, if the data of FIG. It is calculated as follows.

  That is, in the case of a non-loop playlist, sumR = relationship between content 1 and content 2 + relationship between content 2 and content 3 + relationship between content 3 and content 4 + relationship between content 4 and content 5 + content 5 And the relationship of the content 6 = 0.3 + 0.1 + 0 + 0 + 0 = 0.4.

  In the case of a loop playlist, sumR = relationship between content 1 and content 2 + relationship between content 2 and content 3 + relationship between content 3 and content 4 + relationship between content 4 and content 5 + content 5 Relevance of content 6 + relationship of content 6 and content 1 = 0.3 + 0.1 + 0 + 0 + 0 + 0 = 0.4.

  The playlist creation means 14 calculates the sum total sumR for each playlist, and stores each playlist together with the sumR in the primary storage device 30. Then, the playlist having the largest total relevance among the playlists is set as the optimum playlist.

  Note that it is possible to present not only the playlist with the largest sum R of relevance but also a plurality of playlists from the largest to the user, and allow the user to select the optimum playlist.

  Also, when calculating the sum total sumR of relevance, not only the relevance of the content before and after each content, but also the number before and after the second, depending on the size of the number of content n constituting the playlist By weighting and considering the relevance to the content and the relevance to the content before and after the third content, it is possible to create a playlist that takes the relevance into consideration.

  Also, instead of considering the element for calculating the sum total sumR in units of content, the sum sumR is calculated in consideration of the relevance with the content included for t seconds before the content display (after display). By doing so, it is possible to create a playlist in consideration of the relevance.

  Further, for example, when it is desired to fix the transition order between certain contents such that the contents 2 are always displayed after the contents 1, the instruction is input as a constraint condition by the parameter setting means 11 (input device 20). A playlist that satisfies the constraint conditions can be created. In that case, the playlist creation means 14 may perform the above-described playlist evaluation only for the playlist that satisfies the constraint conditions among the combinations of all playlists.

  After the optimum playlist is created by the above method, the optimum playlist is represented on the graph by the playlist visualization means 16 in FIG. 2 (step S5). Specifically, the playlist visualization means 16 uses a graph drawing technique called a spring model (reference: Eades, P. "A Heuristic for Graph Drawing." Congressus Numerantium, Vol.42, pp.149-160, 1984). Then, each content of the playlist is arranged as a node on the graph. The outline is shown in Fig. 5. The spring model is a graph drawing that finally finds the node layout by calculating the stable state by placing the related nodes close to each other and the unrelated nodes far from each other. It is a technique. The distance between the nodes is inversely proportional to the relationship between the contents indicated by the nodes. The strength of the relationship between nodes is specified by the edge weight between the nodes, and the greater the weight, the higher the relationship between the nodes.

  The inter-content relationship R calculated by the relationship calculation means 13 is used as the edge weight between the nodes in the spring model. For example, when the data of FIG. 4 is used as the relevance information 42, the edge weight between the node “content 1” and the node “content 2” on the graph is “0.3”. FIG. 6 shows an image of the spring model when the data of FIG. 4 is used as the relevance information 42. In FIG. 6, the distance between the nodes changes according to the relevance between the contents.

  After determining the arrangement position of the nodes using the spring model, all the edges between the nodes are hidden, and a directed edge is newly drawn between the nodes based on the playlist information 43. The direction of the edge follows the playlist transition order. For example, FIG. 7 is a loop type play in which a directed edge is added to the node arrangement of FIG. 6 and displayed in the order of “content 1 → content 4 → content 6 → content 3 → content 2 → content 5 (→ content 1)”. A list is shown. In FIG. 7, a balloon is attached to the content 1 in order to clarify the starting point of the loop type playlist. In addition, the starting point may be clarified by changing the color of the content.

  Returning to FIG. 2, the spring model graph created by the playlist visualization means 16 is displayed on the display device 50 (step S6).

  Then, the user determines whether to edit the playlist based on the graph displayed on the display device 50 (step S7).

  When editing the playlist, the playlist is edited by editing the graph displayed by the display device 50 using the input device 20 (step S9). The graph is edited by correcting the edge between nodes.

  For example, a transition of “content 1 → content 4” with respect to a playlist having a transition order of “content 1 → content 4 → content 6 → content 3 → content 2 → content 5 (→ content 1)” as shown in FIG. An example in which the order is changed to a transition order of “content 1 → content 2” is shown in FIG. In this case, editing is performed such that the directed edge drawn from the content 1 to the content 4 is deleted and the directed edge is drawn from the content 1 to the content 2. If the transition order is to be determined, the edge to be determined is specified using the input device 2 (content 6 → content 3 in FIG. 8).

  The playlist editing means 15 satisfies the constraint condition by using the editing result of the playlist transition order performed through the input device 20 as a constraint condition (in the example of FIG. 8, “content 1 → content 2” and “content 6 → The playlist having the highest relevance sumR is searched from the playlist information 43 to obtain the optimum playlist.

  The playlist visualization means 16 creates a spring model graph based on the optimum playlist (step S5), and displays the graph on the display device 50 (step S6).

  Until the user is satisfied with the optimum playlist, the playlist is edited by the input device 20 and the playlist editing means 15 (step S9), the graph is created by the playlist visualization means 16 (step S5), and the graph on the display device 50 is displayed. The output (step S6) is repeated, and then the optimum playlist is displayed on the display device 50, for example (step S8).

  As described above, the relevance calculation unit 13 and the playlist creation unit 14 operate as a playlist creation device, and the playlist visualization unit 15, the display device 50, the input device 20, and the playlist editing unit 15 operate as a playlist editing unit. To do.

  In the above description, the playlist visualization unit 16 visualizes and edits the optimum playlist created by the playlist creation unit 14. However, the playlist is not limited to the optimum playlist created by the playlist creation unit 14. Similarly, a playlist input from the outside can be visualized by the playlist visualization means 16 and edited.

<Effect>
The playlist creation apparatus according to the present embodiment is a playlist creation apparatus that creates a playlist as a playback order of a plurality of contents made of digital material, and a relation calculation means 13 that calculates the relation between the contents. And the playlist creation means 14 for creating the playlist based on the relevance, so that it is possible to improve the advertising effect due to the synergy effect compared with the case of playing the playlist that does not consider the relevance between contents. is there.

  Further, in the playlist creation device of the present embodiment, the playlist creation means 14 creates a playlist based on the sum total sumR of relevance weights between adjacent contents whose playback order is around a predetermined number. Compared with the case of playing a playlist that does not take into account the relevance, it is possible to improve the advertising effect due to synergy effect.

  Alternatively, in the playlist creation device of the present embodiment, the playlist creation means 14 creates the playlist based on the sum of the relevance with the content played back at a predetermined time before and after the playback of each content. Compared with the case of playing a playlist that does not consider the relationship between them, the advertising effect can be improved by the synergy effect.

  The playlist editing apparatus according to the present embodiment is a playlist editing apparatus that edits a playlist as a playback order of a plurality of contents made of digital material, and each of the contents constituting the playlist is replaced with a node, A playlist visualization unit that arranges the nodes such that the distance between the nodes is inversely proportional to the relevance between the contents indicated by the nodes, and creates a graph in which a directed edge is drawn between the nodes. 16, a display device 50 for displaying the graph on the screen, and an input device 20 for inputting a user operation for editing a directed edge between the nodes of the graph displayed on the display device 50 on the screen. And playlist editing means 15 for editing the playlist in accordance with the user operation. As a result, the user can evaluate and edit the playlist while grasping the relevance between the contents on the screen of the display device 50.

  Further, in the playlist editing device according to the present embodiment, the playlist visualization means 16 creates the graph for the playlist created by the playlist creation device according to the present embodiment, so that the user can While grasping the relevance on the screen of the display device 50, the playlist can be evaluated and edited.

  DESCRIPTION OF SYMBOLS 10 Arithmetic processing apparatus, 11 Parameter setting means, 12 Content information input means, 13 Relevance calculation means, 14 Playlist creation means, 15 Playlist edit means, 16 Playlist visualization means, 20 Input device, 30 Primary storage device, 40 Storage device, 41 content information, 42 relevance information, 43 playlist information, 50 display device.

Claims (5)

  1. A playlist creation device for creating a playlist as a playback order of a plurality of contents made of digital material,
    Relevance calculating means for calculating relevance between the contents;
    And a play list creating means for creating the playlist based on the relevance,
    The relevance calculating means calculates relevance between the contents using relevance of keywords associated with the content,
    Relevance of the keyword, Ru determined based on the search hits in the case of searching using a search engine,
    Playlist creation device.
  2. The playlist creation means creates the playlist based on a total sum of relevance weights between the contents whose playback order is around a predetermined number.
    The playlist creation device according to claim 1.
  3. The playlist creating means creates the playlist based on a sum of weights of relevance with the content that is played back at a predetermined time before and after the playback of each content.
    The playlist creation device according to claim 1.
  4. A playlist editing device for editing a playlist as a playback order of a plurality of contents made of digital material,
    The contents constituting the playlist are replaced with nodes, and the nodes are arranged so that the distance between the nodes is inversely proportional to the relevance between the contents indicated by the nodes. A playlist visualization means for creating a graph with a directional edge drawn;
    A display device for displaying the graph on a screen;
    An input device for inputting a user operation for editing a directed edge between the nodes of the graph displayed on the display device on the screen;
    Playlist editing means for editing the playlist according to the user operation,
    Playlist editing device.
  5. The playlist visualization means creates the graph for the playlist created by the playlist creation device according to any one of claims 1 to 3.
    The playlist editing apparatus according to claim 4.
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