| FILE FORMATSThere are several audio file
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| | Media Audio A digital system invented by
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| formats in common use. There are fewer
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| | Microsoft, and is used in portable
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| video file formats, but audio video file
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| | digital audio players. Using WMA, a file
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| extensions can be confusing. This is just
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| | can be programmed so that it cannot be
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| a brief description of what the more
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| | copied, and can be used to protect
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| commonly used audio and video file
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| | copyright.WMF: Windows Media Format These
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| formats and systems are.AAC:Advanced
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| | are audio-video files comprising WMA and
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| Audio Coding This is the audio file
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| | video codecs. They provide high quality
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| format used by Apple for the iTunes Music
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| | and media security for streaming and
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| Store, and it may appear with the M4A
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| | download and play applications on
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| filename extension. It is better than MP3
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| | computers.WMV: Windows Media Video Used
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| for sound quality. It was developed as
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| | in the Windows media Player, this is used
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| part of the MPEG4 group owned by Dolby
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| | to stream and download and play audio and
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| (see below).AU: This audio file format is
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| | video content.When dealing with audio and
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| the standard used by Java, Sun and
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| | video file formats, you will sometimes
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| Unix.MPEG: Moving Pictures Expert Group
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| | notice the term 'codec'. A codec is
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| There are a number of MPEG types now,
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| | simply short for encoder-decoder (or
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| described below.MPEG-1: This is used in
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| | compressor - decompressor). A main
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| digital cameras and camcorders for small
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| | function of a codec is to compress audio
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| video clips. VHS quality playback can be
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| | or video data streams so that
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| expected from MPEG-1.MPEG-2: Used for
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| | transmission of digital audio samples and
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| digital satellite TV, professional movie
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| | video frames can be speeded up and
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| recording and recording of home DVD
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| | storage space reduced.The objective of
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| recordings. Provides provision for
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| | all codecs is to reduce the file size to
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| multi-channel surround sound
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| | a minimum while maintaining audio and
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| recordings.MPEG-3: MPEG-3 was propose as
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| | video quality. A quick indication of the
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| an entity, but eventually merged into
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| | codec's place in the path of transmission
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| MPEG-2.MPEG-4: This is the newest MPEG
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| | and reception is:Video device (e.g.
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| system and is used for streaming internet
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| | camcorder) - video capture card - video
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| content. It is also used in portable
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| | digitized - codec (compresses digital
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| video recorders and for internet
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| | info) - result (MPEG2, AVI, WMV etc) -
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| downloads. Required for DivX. It improves
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| | codec (decompress) - video frames -
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| digital broadcasting and interactive
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| | display device.Between the two codecs the
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| graphics and multimedia.MP3: Digital
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| | compressed result is transferred to the
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| audio files, most commonly used to store
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| | display device transmitted, stored on
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| and playback music. It compresses the
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| | file, etc). So to condense the flow even
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| files to about 10% of a normal audio
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| | further, we could basically describe it
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| file, and a normal music track will be
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| | as:raw data - codec - transmit - codec -
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| about 5 -6 MB in size. MP3 stands for
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| | playThis is simplistic, but it shows
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| MPEG-1 Audio Layer 3, not MPEG-3 as many
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| | where the codecs are used. Therefore, in
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| people think. A typical MP3 audio file is
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| | order to play a movie, video or piece of
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| near CD quality.OGG: An audio file format
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| | music of a certain format, you need a
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| supporting a variety of codecs, the most
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| | codec in your computer to allow you to
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| popular of which is the audio codec
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| | decompress the file and play it.Here is
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| Vorbis. However, MP3 files are much more
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| | some free software which checks what
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| broadly supported than Vorbis.RA: Real
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| | codec a video system uses, and what codec
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| Audio This format is designed for
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| | your system needs to play it:Codec
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| streaming audio over the Internet. It is
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| | Tool.The different video file formats are
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| a self-contained file format with all the
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| | required to meet the requirements of
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| audio information stored within the file
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| | various video devices. Similarly, audio
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| itself.WAV: The simplest of the audio
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| | file formats are designed to meet the
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| file formats, developed by Microsoft and
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| | needs of the specific delivery methods
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| IBM, and built into Windows 95. It is an
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| | and storage and playback devices
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| uncompressed audio file format with large
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| | introduced by large corporations such as
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| file sizes (10 x MP3), and does not need
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| | Microsoft, Sony and Apple. Thus, Sony
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| further processing to play. The WAV file
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| | invented the UMD (Universal Media Disk)
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| consists of three blocks of information:
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| | for the PSP (Playstation Portable), and
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| The RIFF block which identifies the file
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| | Apple introduced AAC (M4A) for its
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| as a WAV file, The FORMAT block which
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| | iPod.Peter Nisbet is the author of many
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| identifies parameters such as sample rate
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| | articles on audio and video file systems,
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| and the DATA block which contains the
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| | their transmission, playback and
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| actual data, or music sample.WMA: Windows
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| | conversion.
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