Digitization Programmes National Library of the Czech Republic Adolf Knoll

History Digitization started in Routine production in 1996 Two national programmes:  Memoriae Mundi Series Bohemica (direct scanning – manuscripts, old printed books, maps, …)  Kramerius (preservation microfilming + digitization – acid paper materials esp. newspapers and other periodicals

Coverage Limited access to rare materials  Endangered by frequent use  Endangered by deterioration of carriers, corrosion of writing and printing materials, fading colours, etc. Special case: brittle acid paper Need to preserve through offering copies

National programmes Parts of the Public Information Services of Libraries programme Grant system under the Ministry of Culture since 2000 Call for proposals, grant committees, the applicants can require up to 70% of cost Open access + application of recommended standards

Production MMSB Yearly: ca. 110,000 pages digitized Altogether:  400,000 pages MSS  140,000 pages old prints  Several hundreds of maps 3 devices for direct digitization (cameras and camera scanners) Kramerius Yearly: up to 400,000 pages digitized and up to 1,000,000 filmed Altogether:  Ca. 800,000 pages  Sound recordings of interwievs 2 microfilm scanners

Metadata framework High readability Standard platform Enhanced communication SGML and any applications thereof:  TEI, Czech DOBM  XML These features enable: Direct access Indexing of metadata in sophisticated access tools:  ManuFreT (local)  AiP SAFE (Internet) Re-export into production formats and conversion into other formats

Metadata framework

Visual data Stored in graphic formats for:  preview (GIF, JPEG)  access (JPEG, limited TIFF/G4)  archival storage (JPEG, limited TIFF/G4) Optimized for access  production processing (optimal parameters for JPEG)  access processing (on-the-fly DjVu conversion, DjVu)  application of multiresolution formats (MrSID)

Access data: user side transfer:  modem 56 kbit/s = 7 KB per 1 second JPEG 2.1 MB = 300 seconds = 5 minutes DjVu 140 KB = 20 seconds  well-comparable quality decompression problems  standard, progressive, or successive display  multiresolutional display

Access data: provider side acceptable quality for established purpose  optimized resolution  optimized lossy compression quality factors  new methods Mix Raster Content approach (image layers compressed separately and merged)  wavelet encoding scheme  JBIG-similar encoding black-and-white scheme Multiresolution approach (several resolution stored in one image file)

MRC + wavelet DCT lossless

Reference digital archive on-line Fast disk arrays for access Reference archive – preservation microfilm Reference digital archive for off-line media (CD, mg. tapes) Administration Archiving of and access to reformatted documents

Digital library Catalogues periodicals Virtual integrator international e.g. ECH:TOPICC, VICODI, European Digital Periodicals User(s) Grid CESNET2 U3 U2 U1, U2, U3, …, Ux - data storage faciltities U1

And… Also a lot of activities concerning digitally published information: Physical media (esp. audio CD) Access to full texts of articles from periodicals Web archiving … and also archiving our own digital production