Meridian Lossless Packing

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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[edit]

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

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