Dolby® TrueHD unleashes the ultimate high-definition audio experience.
Delivers 100 percent lossless audio that is bit-for-bit identical to the original studio master
Supports up to eight channels of 24-bit/96 kHz audio playback on Blu-ray Disc™
Provides up to 4:1 compression efficiency, maximizing HD disc space and minimizing bandwidth requirements
Developed specifically for high-definition entertainment, Dolby TrueHD is Dolby’s new-generation, 100 percent lossless technology.
Dolby TrueHD brings stunning high-definition sound to the home theater experience, unlocking the full potential of Blu-ray Disc and future HD (streamed) media.
Dolby TrueHD delivers powerful sound that is bit-for-bit identical to that created in the recording studio or mixing stage, and to that captured at a live concert. High-definition entertainment has now taken a giant leap forward.
Why Dolby
For PCs with built-in Blu-ray Disc players or burners or with provision for external Blu-ray Disc drives, Dolby TrueHD unlocks the full audio capabilities of the format.
Enables a PC to serve as a full-featured center of an advanced home theater system
Supports Blu-ray Disc’s standard eight full-range channels of 24-bit/96 kHz audio, and up to 5.1 channels of 24-bit/192 kHz audio
Enables HDMI™ single-cable digital connection for audio and video
Transfers data at bit rates of up to 18 Mbps for unmatched sound quality
Dolby TrueHD brings a spacious soundstage, highly realistic effects, and unsurpassed dynamic range to home theaters, so your customers experience studio-quality “you are there” surround sound.
By achieving compression ratios of as much as 4:1, Dolby TrueHD lets content producers deliver the ultimate in sound quality while minimizing bandwidth and storage requirements.
Additional Dolby TrueHD Features
Expands metadata support to give content creators advanced control over audio playback
Supports independent two-channel integration of “artist’s mix” content into the bitstream
Maintains constant volume levels when changing between Dolby TrueHD and Dolby Digital programming via dialogue normalization
Includes dynamic range control, enabling reduced peak volume levels without the loss of overall sound quality
Leverages interchannel correlations to reduce data rates for lossless matrixing and more efficient downmixing
Employs decorrelation to take advantage of the predictive nature of audio
Allows fewer bits to be assigned for commonly occurring values within the data stream for a more efficient coding process using Huffman (entropy) coding
Smoothes the encoded data rate with managed FIFO buffering throughout transmission
Technology Specifications
Sampling frequency: 44.1 kHz to 192 kHz
Sampling rate: Constant for all channels
Word length: Up to 24 bits
Blu-ray Disc™ channel support: Up to eight channels of 24-bit/96 kHz audio; designed to be expandable should the Blu-ray Disc standard adopt additional channels
Two- to six-channel support: Up to 24-bit/192 kHz
Maximum bit rate: Up to 18 Mbps on Blu-ray Disc
Dolby TrueHD
Dolby TrueHD is the next-generation lossless technology developed for high-definition disc-based media. This advanced technology provides an unprecedented audio experience—bit-for-bit identical to the highest-resolution studio masters.