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Why Did You Cover That Song?:
Modeling N-th Order Derivative Creation with Content Popularity
Kosetsu Tsukuda, Masahiro Ha...
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Why Did You Cover That Song?: Modeling N-th Order Derivative Creation with Content Popularity

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CIKM 2016

Published in: Technology
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Why Did You Cover That Song?: Modeling N-th Order Derivative Creation with Content Popularity

  1. 1. Why Did You Cover That Song?: Modeling N-th Order Derivative Creation with Content Popularity Kosetsu Tsukuda, Masahiro Hamasaki, Masataka Goto National Institute of Advanced Industrial Science and Technology (AIST) Estimate Factors That Trigger N-th Order Derivative Creation Contributions Modeled n-th order derivative creation as a function of original work attractiveness, original work popularity, and derivative work popularity. Quantitatively evaluated our model using music content dataset and showed the model adopting all three factors achieved the best result. Qualitatively evaluated our model in terms of category characteristics, temporal development of factors, and creator characteristics. Sing Dance Play Oatt 14.6 17.3 42.5 Opop 40.0 21.7 40.0 Dpop 45.4 61.0 17.5 0 20 40 60 80 100 120 Apr-10 Oct-10 Apr-11 Oct-11 Apr-12 Oct-12 0 5 10 15 20 25 Nov-10 May-11 Nov-11 May-12 Nov-12 0 5 10 15 20 25 Jul-10 Jan-11 Jul-11 Jan-12 Jul-12 Jan-132010/4 2010/10 2011/4 2011/10 2012/4 2012/10 2010/11 2011/5 2011/11 2012/5 2012/11 2010/7 2011/1 2011/7 2012/1 2012/7 2013/1 Result 1: category characteristics Result 2: temporal development of factors Result 3: creator characteristics : creator Factor 1 Factor 2 Factor 3 Original work’s attractiveness (Oatt) Original work’s popularity (Opop) Derivative work’s popularity (Dpop) Original song I cover this song because I like the melody! 1 Hatsune Miku Senbon Zakura sm15630734 2 GUMI Yakusoku no tane sm15622476 3 GUMI Dystopia・Zipangu sm15603633 Original song rankingIf I cover this popular original song, my cover video might also become popular! 1 2 3 Gurutamin Senbon Zakura sm16011082 Shamuon/Amatsuki Panda Hero sm16017797 Cover song ranking Mitani Nana Senbon Zakura sm16013169 Other derivatives of this work are popular, so I would also like to create one! 0 T Rate Rate at which creator posts a derivative work at time : - is the original work’s attractiveness, - is the probability that is influenced by Oatt, - assumed to be constant in time. 0 T Rate Rate at which creator posts a derivative work at time : - is the rank of the original work in the ranking, - is the influence of original work’s popularity, - is the probability that is influenced by Opop. , , , Rate at which creator posts a derivative work at time : - is the rank of the derivative work in the ranking, - is the influence of derivative work’s popularity, - is the probability that is influenced by Dpop. 0 TRate , , , 0 Marginalized joint distribution of and , !|#, $, %, &, ', ( * , !|#, $, +, ,, -, ., % +|', ( ,|', ( -|', ( .|& /+/,/-/. Sample 012 in the E-step of a stochastic EM procedure 3| , !∖ , #, $, %, &, ', ( ∝ , !∖ , 3|#, $, %, &, ', ( ∖ , !∖ |#, $, %, &, ', ( : set of derivative work posting events of all original works; !: set of latent variables of all derivative works of all original works; Assume a Gamma prior for , , and , and a Dirichlet prior for 6 . 1 2 3 4 5 6 7 Sing: creators tend to follow fads and put a high priority on content popularity. Dance: the ratio of Dpop is high because many creators imitate the choreography proposed in a derivative work. Play: creators play their favorite original songs without being affected by fads. #ofderivativeworks Derivative works of an original song in the “sing” category. Derivative works of an original song in the “dance” category. Derivative works of an original song in the “play” category. For a creator in circle A, recommend original works similar to the original works he/she used in the past. For a creator in circle B, recommend original works because he/she can compose original choreography. For a creator in circle C, recommend popular content in the derivative work ranking. These days amateur creators who used to be just consumers can also easily create content (a.k.a. user generated content). Since not all amateur creators can create new content from scratch, it is popular to use existing original (1st generation) work as the basis for new content: such content is called derivative work. Niconico Thingiverse sm15630734 thing:398548 sm17483164 sm16309076sm18407945 thing:1541729thing:1481404 Sing Dance Play Resize drawers Add partitions In this kind of derivative work creation activity, a creator influenced by 2nd gen content can create 3rd gen content. Similarly, Nth gen content can be transformed into N+1th gen content. Such derivative work creation activity is called N-th order derivative creation. sm15630734 sm17703100 sm16066609 sm16094094 sm24854396 sm16394955 … … … … … … … 1st generation 2nd generation 3rd generation Original song Original accessory case (%) Oatt Opop Dpop Oatt Sing A Opop Dpop B Oatt Opop Dpop Dance C Oatt Opop Dpop Play

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