{"metadata":{"_oai":{"id":"oai:ipsj.ixsq.nii.ac.jp:00010772","sets":["581:638:639"]},"path":["639"],"owner":"1","recid":"10772","title":["シーン適応な高速動画像分散トランスコーディング"],"pubdate":{"attribute_name":"公開日","attribute_value":"2004-12-15"},"_buckets":{"deposit":"279be972-3349-46a4-bcf4-78481aad1f55"},"_deposit":{"id":"10772","pid":{"type":"depid","value":"10772","revision_id":0},"owners":[1],"status":"published","created_by":1},"item_title":"シーン適応な高速動画像分散トランスコーディング","author_link":["0","0"],"item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"シーン適応な高速動画像分散トランスコーディング"},{"subitem_title":"Scene Adaptive Distributed Video Transcoding","subitem_title_language":"en"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"論文","subitem_subject_scheme":"Other"}]},"item_type_id":"2","publish_date":"2004-12-15","item_2_text_3":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"株式会社NTTデータ技術開発本部"},{"subitem_text_value":"株式会社NTTデータ技術開発本部"},{"subitem_text_value":"株式会社NTTデータ技術開発本部"},{"subitem_text_value":"東京工科大学コンピュータサイエンス学部"},{"subitem_text_value":"大阪大学大学院情報科学研究科"}]},"item_2_text_4":{"attribute_name":"著者所属(英)","attribute_value_mlt":[{"subitem_text_value":"NTT DATA Corporation","subitem_text_language":"en"},{"subitem_text_value":"NTT DATA Corporation","subitem_text_language":"en"},{"subitem_text_value":"NTT DATA Corporation","subitem_text_language":"en"},{"subitem_text_value":"School of Computer Science, Tokyo University of Technology","subitem_text_language":"en"},{"subitem_text_value":"Graduate School of Information Science and Technology, Osaka University","subitem_text_language":"en"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"publish_status":"0","weko_shared_id":-1,"item_file_price":{"attribute_name":"Billing file","attribute_type":"file","attribute_value_mlt":[{"url":{"url":"https://ipsj.ixsq.nii.ac.jp/record/10772/files/IPSJ-JNL4512022.pdf"},"date":[{"dateType":"Available","dateValue":"2006-12-15"}],"format":"application/pdf","billing":["billing_file"],"filename":"IPSJ-JNL4512022.pdf","filesize":[{"value":"647.3 kB"}],"mimetype":"application/pdf","priceinfo":[{"tax":["include_tax"],"price":"660","billingrole":"5"},{"tax":["include_tax"],"price":"330","billingrole":"6"},{"tax":["include_tax"],"price":"0","billingrole":"8"},{"tax":["include_tax"],"price":"0","billingrole":"44"}],"accessrole":"open_date","version_id":"deea22fa-1cb4-4136-a737-f1bff1247c8a","displaytype":"detail","licensetype":"license_note","license_note":"Copyright (c) 2004 by the Information Processing Society of Japan"}]},"item_2_creator_5":{"attribute_name":"著者名","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"三部, 靖夫"},{"creatorName":"大上貴充"},{"creatorName":"渡辺, 真太郎"},{"creatorName":"中村, 太一"},{"creatorName":"若宮, 直紀"}],"nameIdentifiers":[{}]}]},"item_2_creator_6":{"attribute_name":"著者名(英)","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Yasuo, Sambe","creatorNameLang":"en"},{"creatorName":"Takamitsu, Ohgami","creatorNameLang":"en"},{"creatorName":"Shintaro, Watanabe","creatorNameLang":"en"},{"creatorName":"Taichi, Nakamura","creatorNameLang":"en"},{"creatorName":"Naoki, Wakamiya","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_2_source_id_9":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00116647","subitem_source_identifier_type":"NCID"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourceuri":"http://purl.org/coar/resource_type/c_6501","resourcetype":"journal article"}]},"item_2_source_id_11":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"1882-7764","subitem_source_identifier_type":"ISSN"}]},"item_2_description_7":{"attribute_name":"論文抄録","attribute_value_mlt":[{"subitem_description":"シーンチェンジを境界とするように分割して，符号方式や符号レートを変換するシーン適応な動画像の分散トランスコーディングについて提案する．シーン適応にトランスコードすることで，分割点で画質劣化が生じた場合でもこの劣化が知覚されにくくなる．このことにより，詳細な符号化レート制御が行えないような様々な符号方式への変換も，分散化にともなう画質劣化を生じずに高速に行うことが可能になる．分散化の方式として固定長割当てと可変長最適割当ての2 つの割当てに基づいてシーン適応に分散化する方式について検討し，分割数を少なくした可変長割当てに基づく方式が有利であることを示す．このシーン適応分散トランスコーディングは，シーンチェンジ間隔が長い映像ほど処理時間は長くなるが，この間隔が比較的長いドキュメンタリ映像のデータを用いたシミュレーション実験から，10 台のPC で分散処理することにより処理時間をおよそ1/5 程度に短縮できることを示す．","subitem_description_type":"Other"}]},"item_2_description_8":{"attribute_name":"論文抄録(英)","attribute_value_mlt":[{"subitem_description":"This paper presents scene-adaptive distributed video transcoding, which alters an original coded video file into various video coding formats and rates with employing abrupt scene change detection. The transcoding system divides the video file into small segments along the time axis and transcodes them in parallel, in order to decrease the total transcoding time. Parallel transcoding along time axis without video coding rate-control among segments usually suffers from quality degradation around the segmented cut points in the transcoded video, because of a lack of information such as the coding complexity of the previous segment. Scene adaptive transcoding can decrease temporal video quality degradation perceived by human observers. This provides more flexibility in terms of video encoder used in the transcoder and makes possible to change the video file into various kinds of formats. We investigate how segment transcoding should be distributed to obtain the shortest total transcoding time. Simulation results show that the scene-adaptive distributed transcoding on 10 PCs can decrease the transcoding time by a factor of about 5.","subitem_description_type":"Other"}]},"item_2_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicPageEnd":"2772","bibliographic_titles":[{"bibliographic_title":"情報処理学会論文誌"}],"bibliographicPageStart":"2760","bibliographicIssueDates":{"bibliographicIssueDate":"2004-12-15","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"12","bibliographicVolumeNumber":"45"}]},"relation_version_is_last":true,"item_2_alternative_title_2":{"attribute_name":"その他タイトル","attribute_value_mlt":[{"subitem_alternative_title":"分散処理"}]},"weko_creator_id":"1"},"id":10772,"updated":"2025-01-23T02:38:48.905899+00:00","links":{},"created":"2025-01-18T22:45:35.315937+00:00"}