Dolby TrueHD
Dolby TrueHD, also known as MLP, is a lossless audio codec used widely on HD and UHD Blu-ray Discs. Dolby TrueHD supports up to 24-bit audio and sampling rates from 44.1 kHz to 192 kHz. Dolby TrueHD supports up to 7.1 audio channels as well as Dolby Atmos immersive audio.
As Dolby TrueHD is a lossless audio codec, the data rate is variable. For example, Dolby TrueHD bitrates average around 6,000 kbps for Dolby Atmos at 48 kHz with peak data rates up to a maximum of 18,000 kbps for high sampling rate multichannel content.
| Dolby Digital | Dolby Digital Plus | Dolby TrueHD | |
|---|---|---|---|
| Stereo | ✔ | ✔ | ✔ |
| 5.1-ch | ✔ | ✔ | ✔ |
| 7.1-ch | ✔ | ✔ | |
| Dolby Atmos | ✔ | ✔ | |
| Lossless | ✔ | ||
| S/PDIF | ✔ | ||
| HDMI | ✔ | ✔ | ✔ |
| HDMI ARC | ✔ | ✔ | |
| HDMI eARC | ✔ | ✔ | ✔ |
Dolby TrueHD technical documents
Dolby TrueHD (MLP) high-level bitstream description Go Dolby TrueHD (MLP) bitstreams within the ISO base media file format Go