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