著者
石先 広海 Herring Susan C. 服部 元 小野 智弘 滝嶋 康弘
出版者
FIT(電子情報通信学会・情報処理学会)運営委員会
雑誌
情報科学技術フォーラム講演論文集
巻号頁・発行日
vol.12, no.3, pp.47-52, 2013-08-20

We analyze user behavior on SoundCloud.com, a web-based music distribution site, using the methodology of computer-mediated discourse analysis. The broad goal is to infer patterns of use that can inform the development of methods to facilitate communication among online users. In order to achieve this goal, we analyze SoundCloud comments and identify site design features that facilitate users' actions, using speech act analysis and dynamic topic analysis. We address two research questions: What are the most common communicative acts on the music distribution site, and which commenting function of the site contributes most to facilitating interactive commenting? Results of speech act analysis show that 56% of comments are REACT which means site users mostly react to the song in short, simple comments. Additionally the users tend to be more interactive when using the timed comment function, which appear below the song waveform, provided by the site. Dynamic topic analysis reveals that the structure of regular comments, made on the song as a whole, shows prompt focused such as blog comment, and structure of timed comments shows sequential threads are more interactive as is the case in chatting. These findings indicate that comments which focus on particular part of the song have possibility to facilitate user's interactive comments.
著者
黒川 奈桜子 斎藤 博昭
出版者
FIT(電子情報通信学会・情報処理学会)運営委員会
雑誌
情報科学技術フォーラム講演論文集
巻号頁・発行日
vol.11, no.2, pp.165-170, 2012-09-04

和音推定の既存手法であるクロマベクトル法とスペクトルディップ法の2手法を組み合わせることで,2手法の弱点を互いに補い合い,より高精度な和音推定のシステムの開発を行う.実験では96パターンの単和音とピアノ楽曲を対象に,各フレームで正解の和音を出力する平均順位を求めた.単和音ではクロマベクトル法3.80位,スペクトルディップ法4.19位に比べ提案手法は2.98位となり,楽曲でもクロマベクトル法15.18位,スペクトルディップ法11.57位に対して提案手法は11.31位となった.