ITEC 1000 Lecture Notes - Ebcdic, Optical Character Recognition, Gif
26 Mar 2014
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Itec 1000 winter 2010 peter khaiter. Lecture 3 data formats jan 18. Human communication: includes language, images and sounds. Computers: process and store all forms of data in binary format. Conversion to computer-usable representation using data formats: define the different ways human data may be represented, stored and processed by a computer. Proprietary formats: unique to a product or company, e. g. Standards (evolve in two ways): proprietary formats become de facto standards (e. g. adobe postscript), invented by an international standard organization (e. g. motion pictures. Characters (r, t), number digits (0-9), punctuation (!, ;), special purpose. Four codes/standards to represent letters and numbers: bcd (binary-coded decimal), unicode, ascii (american standard code for information interchange), ebcdic (extended binary coded decimal interchange code). Developed by ansi (american national standards institute). 8th bit is unused (or used for a parity bit or to indicate extended character set)
