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The BBC Archives are collections documenting the BBC's broadcasting history, including copies of television and radio broadcasts, internal documents, photographs, online content, sheet music, commercially available music, press cuttings and historic equipment.〔 The original copies of these collections are permanently retained but are now in the process of being digitised, estimated to take until approximately 2015. Some collections are now being uploaded onto the BBC Archives website on BBC Online for viewers to see. The archive is one of the largest broadcast archives in the world with over 12 million items. ==Overview== The BBC Archives encompass numerous different archives containing different materials produced or acquired by the BBC. The earliest material dates back to 1890 and now consists of 1 million hours of playable material, in addition to documents, photographs and equipment. The archives contain 12 million items on 66 miles of shelving spread over several sites.〔 The stock is managed using a bar code system, which help to locate material on the shelves and also track material that has been lent out.〔 The BBC says that the budget for managing, protecting and digitising the archive accounts for only a small part of the BBC's overall spend.〔 The BBC is engaging in an ongoing project to digitise archived programme material, converting recordings made on older analogue formats such as audio tape, videotape and film to electronic formats which are compatible with modern computer systems. Much of the audio-visual material was originally recorded on formats which are now obsolete and incompatible with modern broadcast equipment due to the fact that the machines used to reproduce many formats are no longer being manufactured. Additionally, some film and audio formats are slowly disintegrating, and digitisation also serves as a digital preservation programme. As of summer 2010 BBC Archive staff have spent approximately ten years digitising half of the media content〔〔 and due to improving work practices expect to complete the other half in five years. Current estimates suggest the digitised archive would comprise approximately 52 petabytes of information,〔 with one programme minute of video requiring 1.4 gigabytes of storage.〔 The BBC uses the Material Exchange Format (MXF)〔 which is an uncompressed, non-proprietary format which the BBC has been publicising to mitigate the threat of the format becoming obsolete (as digital formats can and do).〔 The Archive digitisation a key part of the BBC's programme to engineer a fully digital and tapeless production workflow across the entire Corporation. It was closely tied in with the ill-fated Digital Media Initiative (DMI), a scheme which ran from 2008 to 2013 and attempted to create a unified online archive search and programme production system. After spiralling development costs and project delays, the problems with DMI came to public attention during coverage of the death and funeral of Margaret Thatcher in April 2013, when it was reported that the lack of digital ingest facilities provided for BBC News staff meant that tapes had to be sent by taxi from the Perivale centre to be digitised by independent companies in central London. DMI was cancelled in 2013. The BBC Archive website was relaunched online in 2008 and has provided newly released historical material regularly since then. The BBC works in partnership with the British Film Institute (BFI), The National Archives and other partners in working with and using the materials.〔 A related project called "Genome" is expected to complete in 2011 and will make programme listings dating back to 1923, sourced from ''The Radio Times'', available to search online.〔 In July 2008, Roly Keating was appointed Director of Archive Content, with responsibility for increasing public access to the BBC’s archives. In October 2008, Keating appointed Tony Ageh Controller of Archive Development with "specific responsibility for developing ways of making the archive easily understandable and accessible to users". In 2012, BBC Archive Development produced a book - primarily aimed as BBC staff - titled 'BBC Archive Collections: What's In The Archive And How To Use Them'.〔'BBC Archive Collections: What's In The Archives, And How To Use Them' Edited by Jake Berger https://www.dropbox.com/s/rz1o57nzlsf1v04/BBC%20Archive%20Collections%20Guide%202012.pdf?dl=0〕 This book describes the BBC's archive collections and offers guidance around on how items from the collections can be reused online. The book's references to 'Fabric', a system due to be delivered by the Digital Media Initiative are no longer accurate as the project was cancelled. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「BBC Archives」の詳細全文を読む スポンサード リンク
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