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File Format

File Format. Graphic file Format. GIF cross-platform compatibility developed by CompuServe as a common format for exchanging bitmapped images between different platforms uses a lossless compression technique restricted to 256 colours not suitable for photographic images.

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File Format

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  1. File Format

  2. Graphic file Format • GIF • cross-platform compatibility • developed by CompuServe as a common format for exchanging bitmapped images between different platforms • uses a lossless compression technique • restricted to 256 colours • not suitable for photographic images

  3. Graphic file Format • JPEG • strictly speaking, JPEG is a compression technique • JPEG stands for Joint Photographic Experts Group, who developed the compression technique • JPEG file is used to refer to what are correctly called - JFIF - JPEG File Interchange Format.

  4. Graphic file Format • PNG • widely supported on the web • devised to supersede GIFs • GIF compression algorithm patented by Unisys • it is also lossless technique • not restricted to 256 colours • specification published in 1996 by W3C

  5. Graphic file Format • TIFF • not for web • Tag Image File format • supported by most painting programs • can not be read by other programs • natively supported by Windows as is BMP.

  6. Graphic file Format • BMP • not for web • Microsoft Windows Bitmap format • uses a lossless compression technique • restricted to 256 colours • not suitable for photographic images

  7. Vector Graphics file Format • PostScript • developed by Adobe in mid 80s • programming language with built-in graphic capabilities • page layout language rather than single image language

  8. Vector Graphic file Format • EPS • Encapsulated PostScript • most widely used vector graphics format • but a full PostScript interpreter is required to display EPS images

  9. Vector Graphic file Format • SVG • by W3C in 1999 • defined in XML (extensible Markup Language) • SVG is a derivative of PostScript • easier to implement • compact

  10. Vector Graphic file Format • SWF • by Macromedia in 1999 • for vector animations using Flash • is in wide use for vector images • highly compact format • can be rendered very quickly

  11. Sound file Format • AIFF - for MacOS • WAV (or Wave) - for windows • AU - for Unix • WAV is the Audio WAVeform file format • MP3 - MPEG-1 Audio Layer-3

  12. Sound file Format • Video and other multimedia formats can also accommodate sound. • QuickTime and AVI files. • SWF (Flash) files can also be used to store sound. • QuickTime supports AIFF, WAV, AU, and MP3 file formats.

  13. Sound file Format • MIDI • Musical Instruments digital Inteface

  14. Sound and Picture file Format • AVI • AVI stands for Audio and Video Interleaved

  15. Sound and Picture file Format • MOV • movie object • file format for QuickTime by apple in 1991

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