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Meridian Lossless Packing

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Title: Meridian Lossless Packing  
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Subject: Michael Gerzon, Libav, Dolby TrueHD, List of codecs, Shorten (file format)
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Meridian Lossless Packing

The Meridian Lossless Packing logo
The Advanced Resolution logo

Meridian Lossless Packing, also known as Packed PCM (PPCM), is a proprietary lossless compression technique for compressing PCM audio data developed by Meridian Audio, Ltd. MLP is the standard lossless compression method for DVD-Audio content (often advertised with the Advanced Resolution logo) and typically provides about 1.5:1 compression on most music material. All DVD-Audio players are equipped with MLP decoding, while its use on the discs themselves is at their producers' discretion.

Dolby TrueHD, used in Blu-ray and HD DVD, employs MLP, but compared with DVD-Audio, adds higher bit rates, 8 full-range channels, extensive metadata, and custom speaker placements (as specified by SMPTE).

MLP in packaged media formats

Media format Status Channels Max. bit rate
HD DVD Mandatory 2 to 8 18 Mbit/s
Blu-ray Optional 2 to 8 18 Mbit/s
DVD-Audio Mandatory 1 to 6 9.6 Mbit/s
DVD-Video Not available

See also

External links

  • More information from
  • Dolby TrueHD announcement
  • Meridian Lossless Packing (MLP) in a Nutshell
  • "MLP Lossless Compression" by Bob Stuart of Meridian Audio, Ltd.

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