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How MP3 Music Files Work
         About FTP
         About MP3
       About Copyright
         About CD
           Group B




                         How MP3 Music Files Work – p.1/9
About FTP
 •   File Transfer Protocol (FTP) is a standard
     network protocol used to exchange and
     manipulate files over an Internet Protocol
     computer network, such as the Internet. FTP is
     built on a client-server architecture and utilizes
     separate control and data connections between the
     client and server applications. Client applications
     were originally interactive command-line tools
     with a standardized command syntax, but
     graphical user interfaces have been developed for
     all desktop operating systems in use today.



                                           How MP3 Music Files Work – p.2/9
FTP
FTP is also often used as an application component to
automatically transfer files for program internal
functions. FTP can be used with user-based password
authentication or with anonymous user access. The
Trivial File Transfer Protocol (TFTP) is a similar, but
simplified, not interoperable, and unauthenticated
version of FTP.




                                           How MP3 Music Files Work – p.3/9
About MP3
 •   MP3 is ... A patented digital audio encoding
     format using a form of lossy data compression A
     common audio format for consumer audio
     storage An audio-specific format that was
     designed by the Moving Picture Experts Group
     MP3 player




                                         How MP3 Music Files Work – p.4/9
About Copyright
 •   Copyright gives the author of an original work
     exclusive right for a certain time period in
     relation to that work, including its publication,
     distribution and adaptation, after which time the
     work is said to enter the public domain.
     Copyright applies to any expressible form of an
     idea or information that is substantive and
     discrete and fixed in a medium. Some
     jurisdictions also recognize "moral rights" of the
     creator of a work, such as the right to be credited
     for the work. Copyright is described under the
     umbrella term intellectual property along with
     patents and trademarks.

                                            How MP3 Music Files Work – p.5/9
Copyright
An example of the intent of copyright, as expressed in
the United States Constitution, is "To promote the
Progress of Science and useful Arts, by securing for
limited Times to Authors and Inventors the exclusive
Right to their respective Writings and Discoveries".
Copyright has been internationally standardized,
lasting between fifty to a hundred years from the
author’s death, or a shorter period for anonymous or
corporate authorship. Some jurisdictions have
required formalities to establishing copyright, but
most recognize copyright in any completed work,
without formal registration. Generally, copyright is
enforced as a civil matter, though some jurisdictions
do apply criminal sanctions.
                                          How MP3 Music Files Work – p.6/9
About CD
 •   A Compact Disc (also known as a CD) is an
     optical disc used to store digital data. It was
     developed to store music at the start, but later it
     also allowed to store other kinds of data. CD have
     been available since October 1982. In 2009, they
     are still the standard physical medium for
     commercial audio recordings. Standard CDs have
     a diameter of 120 mm and can hold up to 80
     minutes of audio (700 MB of data). The Mini CD
     has various diameters ranging from 60 to 80 mm;
     they are sometimes used for CD singles or device
     drivers, storing up to 24 minutes of audio.


                                           How MP3 Music Files Work – p.7/9
CD
The technology was later adapted and expanded to
include data storage CD-ROM, write-once audio and
data storage CD-R, rewritable media CD-RW, Video
Compact Discs (VCD), Super Video Compact Discs
(SVCD), PhotoCD, PictureCD, CD-i, and Enhanced
CD. CD-ROMs and CD-Rs remain widely used tech-
nologies in the computer industry. The CD and its ex-
tensions are successful: in 2004, worldwide sales of
CD audio, CD-ROM, and CD-R reached about 30 bil-
lion discs. By 2007, 200 billion CDs had been sold
worldwide.
                                         How MP3 Music Files Work – p.8/9
Reference
 •   http://ja.wikipedia.org/wiki/Wiki
 •   http://chiebukuro.yahoo.co.jp/
 •   http://d.hatena.ne.jp/
 •   http://e-words.jp/




                                         How MP3 Music Files Work – p.9/9

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Web Presen

  • 1. How MP3 Music Files Work About FTP About MP3 About Copyright About CD Group B How MP3 Music Files Work – p.1/9
  • 2. About FTP • File Transfer Protocol (FTP) is a standard network protocol used to exchange and manipulate files over an Internet Protocol computer network, such as the Internet. FTP is built on a client-server architecture and utilizes separate control and data connections between the client and server applications. Client applications were originally interactive command-line tools with a standardized command syntax, but graphical user interfaces have been developed for all desktop operating systems in use today. How MP3 Music Files Work – p.2/9
  • 3. FTP FTP is also often used as an application component to automatically transfer files for program internal functions. FTP can be used with user-based password authentication or with anonymous user access. The Trivial File Transfer Protocol (TFTP) is a similar, but simplified, not interoperable, and unauthenticated version of FTP. How MP3 Music Files Work – p.3/9
  • 4. About MP3 • MP3 is ... A patented digital audio encoding format using a form of lossy data compression A common audio format for consumer audio storage An audio-specific format that was designed by the Moving Picture Experts Group MP3 player How MP3 Music Files Work – p.4/9
  • 5. About Copyright • Copyright gives the author of an original work exclusive right for a certain time period in relation to that work, including its publication, distribution and adaptation, after which time the work is said to enter the public domain. Copyright applies to any expressible form of an idea or information that is substantive and discrete and fixed in a medium. Some jurisdictions also recognize "moral rights" of the creator of a work, such as the right to be credited for the work. Copyright is described under the umbrella term intellectual property along with patents and trademarks. How MP3 Music Files Work – p.5/9
  • 6. Copyright An example of the intent of copyright, as expressed in the United States Constitution, is "To promote the Progress of Science and useful Arts, by securing for limited Times to Authors and Inventors the exclusive Right to their respective Writings and Discoveries". Copyright has been internationally standardized, lasting between fifty to a hundred years from the author’s death, or a shorter period for anonymous or corporate authorship. Some jurisdictions have required formalities to establishing copyright, but most recognize copyright in any completed work, without formal registration. Generally, copyright is enforced as a civil matter, though some jurisdictions do apply criminal sanctions. How MP3 Music Files Work – p.6/9
  • 7. About CD • A Compact Disc (also known as a CD) is an optical disc used to store digital data. It was developed to store music at the start, but later it also allowed to store other kinds of data. CD have been available since October 1982. In 2009, they are still the standard physical medium for commercial audio recordings. Standard CDs have a diameter of 120 mm and can hold up to 80 minutes of audio (700 MB of data). The Mini CD has various diameters ranging from 60 to 80 mm; they are sometimes used for CD singles or device drivers, storing up to 24 minutes of audio. How MP3 Music Files Work – p.7/9
  • 8. CD The technology was later adapted and expanded to include data storage CD-ROM, write-once audio and data storage CD-R, rewritable media CD-RW, Video Compact Discs (VCD), Super Video Compact Discs (SVCD), PhotoCD, PictureCD, CD-i, and Enhanced CD. CD-ROMs and CD-Rs remain widely used tech- nologies in the computer industry. The CD and its ex- tensions are successful: in 2004, worldwide sales of CD audio, CD-ROM, and CD-R reached about 30 bil- lion discs. By 2007, 200 billion CDs had been sold worldwide. How MP3 Music Files Work – p.8/9
  • 9. Reference • http://ja.wikipedia.org/wiki/Wiki • http://chiebukuro.yahoo.co.jp/ • http://d.hatena.ne.jp/ • http://e-words.jp/ How MP3 Music Files Work – p.9/9