logging in or signing up Data compression aSGuest17059 Download Post to : URL : Related Presentations : Let's Connect Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 9817 Category: Science & Tech.. License: All Rights Reserved Like it (11) Dislike it (3) Added: April 19, 2009 This Presentation is Public Favorites: 2 Presentation Description No description available. Comments Posting comment... By: bzethiolove (47 month(s) ago) first u shuld have registar and u can download this presentation thank u Saving..... Post Reply Close Saving..... Edit Comment Close By: bhyujik (54 month(s) ago) i need this presentation Saving..... Post Reply Close Saving..... Edit Comment Close By: premj9 (57 month(s) ago) i want download this presentation, how can download. Saving..... Post Reply Close Saving..... Edit Comment Close Premium member Presentation Transcript Data compression : Data compression Prepared by – Ravinder Singh MIT081077 Graphics from - http://plus.maths.org/issue23/features/data/data.jpg Why Data Compression : Why Data Compression Definition Reducing the amount of data required to represent a source of information. Preserve the output data original to the input as much as possible. Objectives Reduce the space required for the data storage. Also reduce the time of data transmission over network. SOURCES - www.data-compression.com/index.shtml Types of Compression : Types of Compression Lossless compression. Lossy compression. Basic principle of both : Graphics from - http://img.zdnet.com/techDirectory/LOSSY.GIF Lossless Compression : Lossless Compression In this the compressing and decompressing algorithms are inverse of each other. TECHNIQUES : Run-Length Encoding. When data contains repeated strings then these can be replaced by special marker. original data compressed data Sources- www.data-compression.com/lossless.shtml 572744444444321333333333335278222222 5727#408321#3115278#206 Lossless (contd.) : Lossless (contd.) Statistical compression: In this the short codes are used for frequent symbols and long for infrequent. Three common principles are :- 1. Morse code. 2. Huffman encoding. 3. Lempel- Ziv -Welch encoding. Relative compression: Extremely useful for sending video, commercial TVs and 30 frames in every second. References - www.data-compression.com/lossless.shtml Lossy compression : Lossy compression Some data in output is lost but not detected by users. Mostly used for pictures, videos and sounds. Basic techniques are : 1. JPEG 2. MPEG Referenced -http://searchciomidmarket.techtarget.com/sDefinition/0,,sid183_gci214453,00.html Transformation Quantisation Encoding decompress compress Latest Developments : Latest Developments Fathom 3.0 Developed by Inlet technologies in cooperation with Microsoft and Scientific Atlanta. Work with media files for mobiles, portable, web and high definition. Geolocation data compression. Used for compress the data between sensors. For navigation the target and its location. Sources- http://localtechwire.com/business/local_tech_wire/wire/story/1276887/ Future : Future Robust digital compression. Just need 1mb additional software on web client. Used smarter algorithms. Massive acceleration of mirror world and high definition video stream. High resolution. Sources- http://www.futureofgadgets.com/futureblogger/show/1730 Annotated Bibliography : Annotated Bibliography I choose the text from – www.data-compression.com/index.shtml www.data-compression.com/lossless.shtml http://searchciomidmarket.techtarget.com/sDefinition/0,,sid183_gci214453,00.html http://localtechwire.com/business/local_tech_wire/wire/story/1276887 http://www.futureofgadgets.com/futureblogger/show/1730 because it fulfills mine requirement for the topic. I choose the graphics from – http://img.zdnet.com/techDirectory/LOSSY.GIF http://plus.maths.org/issue23/features/data/data.jpg because it clears the situation which I want to explain. You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.