Minidisc

MiniDisc


The Sony MZ1 MiniDisc player, the first to hit the market in 1992.
Media typeMagneto-optical disc
EncodingATRAC, linear PCM (with Hi-MD)
Capacity80 min (standard MiniDisc), up to 45 hours of audio (1 GB capacity) (with Hi-MD)
Read mechanism780 nm laser
Write mechanismMagnetic field modulation
Developed bySony
UsageAudio storage, Data storage (with Hi-MD)
Optical disc authoring
  • Optical disc
  • Optical disc drive
  • Optical disc authoring
  • Authoring software
  • Recording technologies
    • Recording modes
    • Packet writing
Optical media types
  • Laserdisc (LD), Video Single Disc (VSD)
  • Compact Disc (CD): Red Book, CD-ROM, CD-R, CD-RW, 5.1 Music Disc, SACD, PhotoCD, CD Video (CDV), Video CD (VCD), SVCD, CD+G, CD-Text, CD-ROM XA, CD-i
  • GD-ROM
  • MiniDisc (MD) (Hi-MD)
  • DVD: DVD-R, DVD+R, DVD-R DL, DVD+R DL, DVD-RW, DVD+RW, DVD-RW DL, DVD+RW DL, DVD-RAM, DVD-D
  • Ultra Density Optical (UDO)
  • Universal Media Disc (UMD)
  • HD DVD: HD DVD-R, HD DVD-RW
  • Blu-ray Disc (BD): BD-R, BD-RE
  • High-Definition Versatile Disc (HVD)
  • High definition Versatile Multilayer Disc (HD VMD)
Standards
  • Rainbow Books
  • File systems
    • ISO 9660
      • Joliet
      • Rock Ridge
      • El Torito
      • Apple ISO 9660 Extensions
    • Universal Disk Format (UDF)
      • Mount Rainier
Further reading
  • History of optical storage media
  • High definition optical disc format war
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A MiniDisc (MD) is a magneto-optical disc-based data storage device initially intended for storage of up to 80 minutes of digitized audio. Today, in the form of Hi-MD, it has developed into a general-purpose storage medium in addition to greatly expanding its audio roots.

MiniDisc was announced by Sony in 1991 and introduced January 12, 1992. The music format was originally based exclusively on ATRAC audio data compression, but the option of linear PCM recording was ultimately introduced to attain CD-quality recordings. MiniDiscs were popular in Japan and Asia as a digital upgrade from cassette tapes, but were not as popular elsewhere.

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