'Summary Multimedia Database\r'

'INTRODUCTION 1) reach a) Combine text + graphics b) opthalmic + audio c) Catalog and index cast + efficient storage and tar 2) 4 Difficulties d) info type e) data utilization f) Data storage g) Data deli really 3) Importance h) Store Image (eg:museum) i) assay and manipulate content 4) Types j) Images k) Audio l) motion picture m) Document n) Handwritten 5) Application o) GIS,CAD,Face-retrieval,doc imaging, checkup db, web 6) Characteristic p) Treat mdb same(p) way as info ground 7) 4 Challenges q) Size r) Time s) semantic Nature of multimedia ) Operation of soulfulness media 8) 5 Features u) Support diff. multimedia data type v) Handle large no multimedia obj. w) Hierarchical storage structure & vitamin A; archiving data x) In yearation-retrieval y) Database capabilities\r\nMore epitome of Devil at My Heels\r\nMULTIMEDIA info\r\n1. Multimedia data size [Size of media data makes storage, processing, transmission and reception of the data very pricey] a. Multimedi a data acquisition * Data capture: photo/audio/ pic * Sampling: convert analog to digital * 8bits = 256 change * 24bits = 16 million colors b.Dealing with Media target Size * 2 approaches : line references/reduce size media * SQL:1999 2 data type B throw & CLOB omit in (PK, FK ,equality test) * Oracle9i: support 2 LOB #internal LOB: BLOB & CLOB #external LOB: BFILE * IBM DB2: BLOB,CLOB,DBLOB(china) c. Reducing Media Object’s Size * Compression algorithmic program *remove duplicate reading *abbreviating information * Objective *Reduce bandwidth/storage * rewrite signal close to original *Robustness,scalability,extensibility * 2 stages: *Predict-estimate redundant & select algorithm Transform-Compress & Decompress * 2 form of compression *Lossless-lose none,2:1,3:1 *Lossy-lose some,10:1,80:1 * devil ways *Run-length encoding *Huffman coding * 2. real time Nature of Multimedia Data d. cleavage: subdividing video obj e. Manual segmentation costly so focus o n involuntary segmentation 3. Semantic Nature of Multimedia Data f. Semantic: metadata describe multimedia obj. g. Refer as: text desc/ typical of metadata(texture of image,frequencies of audios,font size for text)Database Management System and Data\r\n'