Meridian Lossless Packing

The Meridian Lossless Packing logo

The Advanced Resolution logo

Meridian Lossless Packing, also known as Packed PCM (PPCM)^{[citation needed]}, 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, custom speaker placements (as specified by SMPTE), and timecode.

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

• Direct Stream Transfer
• FLAC
• Monkey's Audio
• TTA
• WavPack

External links

• More information from 5dot1.com
• Dolby TrueHD announcement
• Meridian Lossless Packing (MLP) in a Nutshell
• "MLP Lossless Compression" by Bob Stuart of Meridian Audio, Ltd.