Meridian Lossless Packing
Meridian Lossless Packing, also known as Packed PCM (PPCM), is a lossless compression technique for 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 Archival Disc 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|