file format. graphics file format gif (graphics interchange format) jpeg (joint photographic experts...
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File Format
Graphics file Format
Graphics file Format • GIF (Graphics Interchange Format)
• JPEG (Joint Photographic Experts Group)
• PNG (Portable Network Graphics)
• TIFF (Tag Image File format)
• BMP (Bitmap)
Graphic file Format
• GIF (Graphics Interchange Format)– 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
Graphic file Format
• JPEG (Joint Photographic Experts Group)– JPEG is a compression technique
– Joint Photographic Experts Group developed the compression technique
– JPEG file is used to refer to what are correctly called - JPEG File Interchange Format (JFIF).
Graphic file Format
• PNG (Portable Network Graphics)– 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
– http://www.libpng.org/pub/png/
Graphic file Format
• TIFF (Tag Image File format)– not for web
– supported by most painting programs
– can not be read by other programs
– natively supported by Windows as is BMP.
Graphic file Format
• BMP (Bitmap)– not for web
– Microsoft Windows Bitmap format
Vector Graphics file Format • PostScript
• EPS (Encapsulated PostScript)
• SVG
• SWF (Shock Wave File)
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
Vector Graphic file Format
• EPS– Encapsulated PostScript
– most widely used vector graphics format
– but a full PostScript interpreter is required to display EPS images
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
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
Sound file Format
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
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.
Sound file Format
• MIDI– Musical Instruments digital Interface
Sound and Picture file Format
Sound and Picture file Format
• AVI– AVI stands for Audio and Video
Interleaved
Sound and Picture file Format
• MOV– movie object
– file format for QuickTime by apple in 1991
Video file Format Links
• http://www.uwm.edu/People/price/video_file_format_comparison.html
• http://www.wikipedia.org/wiki/Video_file_formats
• http://www.geocities.com/cplarosa/video/vconvert.htm
• http://www.pbs.org/opb/crashcourse/digital_v_analog/mpeg2.html