Meridian Lossless Packing

Meridian Lossless Packing, also known as Packed PCM (PPCM), is a 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.

The Meridian Lossless Packing logo
The Advanced Resolution logo

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
DVD-Video Not available
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gollark: To be fair, some people probably weren't managing well, but that's no reason to do this to everyone.
gollark: I was basically fine with the "not much supervision, you get set work" thing, but this is just stupid.
gollark: I mean, I was fine with working remotely. I could get more done, did not have to bother with (as much) busy-work, had a flexible schedule, sort of thing.

See also
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