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 24-bit/192 kHz audio in Blu-ray Disc

Provides up to 4:1 compression efficiency, maximizing HD disc space and minimizing bandwidth requirements

Supports up to 16 channels, with eight-channel playback that takes full advantage of Blu-ray Disc’s capabilities

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.

Delivering powerful sound that is bit-for-bit identical to that created in the recording studio or mixing stage, Dolby TrueHD brings you as close as it gets to the sound captured at a live concert. High-definition entertainment has now taken a giant leap forward.

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.

Why Dolby

With Dolby TrueHD’s 100 percent lossless coding technology, equipment manufacturers and content producers can now stand out from the competition by delivering studio-quality surround sound that is identical to the original recording.

Transfers data at bit rates of up to 18 Mbps for unmatched sound quality

Delivers up to 16 channels of pristine audio

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 High-Definition Media Interface (HDMI) single-cable digital connection for audio and video

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 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

Dolby® TrueHD vs. MLP Lossless™ on DVD-Audio:

Doubles the maximum bit rate (18 Mbps) and the possible number of channels (16)

Provides more options for stereo support (including delivering a completely separate “artists” stereo mix rather than a downmix)

Enables expanded metadata to include dialogue normalization and dynamic range control, and support for all the new channels introduced in SMPTE 428M

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

Choose from the drop-down menus below to get Dolby professional reference material.

Select a TechnologyDolby 3DDolby DigitalDolby StereoDolby Surround 7.1Dolby AC-2Dolby Digital (AC-3) Encoding/DecodingDolby Digital EXDolby Digital PlusDolby EDolby Open Specification for 3D SystemsDolby TrueHDDolby Volume (STB/TV)HE AACMetadataMLP LosslessDolby Pro LogicDolby Pro Logic IIDolby Pro Logic IIxDolby Surround-- PC --Dolby VoiceBroadcast Loudness

Select a ProductBroadcast LoudnessCat. No. 702Cat. No. 735CP650CP750DM100DMA8PlusDolby Digital CinemaDolby Lake ProcessorDolby Media DecoderDolby Media EmulatorDolby Media Encoder ClientDolby Media Encoder SE (Stand-alone Edition)Dolby Media Meter 2Dolby Media Producer SuiteDolby Media Producer SE SuiteDolby Media ToolsDolby ScreenTalkDolby Show Library (DSL100)DP563DP564DP568DP569DP570DP571DP572DP579DP583DP600DSS200LM100MS10 Multistream DecoderMS11 Multistream DecoderTheater Management System SoftwarePRM-4200CP850