For example, all Dolby TrueHD-capable players can create a 2-channel (stereo-compatible) downmix from a 6-channel source audiotrack.ĭolby TrueHD sees its most popular usage as a high definition audio codec for Blu-ray Disc.
Blu-ray Disc players consider this combination of two audio bitstreams as a single logical audio track, and a Blu-ray Disc player will automatically select the Dolby Digital or Dolby TrueHD bitstream depending on its decoding and/or audio bitstream output capabilities.Īll Dolby TrueHD-enabled Blu-ray Disc players are capable of downmixing the decoded Dolby TrueHD audiotrack to an arbitrary number of channels more suitable for player output. Since Dolby TrueHD is an optional codec, a companion Dolby Digital bitstream (2.0 192Kbps or 5.1 448Kbps/640Kbps) must accompany the Dolby TrueHD bitstream on Blu-ray discs. The maximum encoded bitrate is 18 Mbit/s. Dolby TrueHD audiotracks may carry up to 8 discrete audio channels (7.1 surround) and 20 objects of 24-bit audio at 96 kHz or up to 6 channels (5.1 surround) at 192 kHz. In the Blu-ray Disc specification, Dolby TrueHD is an optional codec. Gives the Blu-ray content creator the ability to include a companion Dolby Digital (640 kbps) 5.1-channel theatrical mix on 7.1-channel Dolby TrueHD titles.Provides superior 7.1 downmix overload detection and protection.Includes dynamic range control, enabling reduced peak volume levels without loss of overall sound quality-ideal for listening without disturbing others.Maintains consistent dialogue levels when changing between Dolby TrueHD and Dolby Digital programming.Delivers up to 16 channels of pristine audio at studio-master quality.
Transfers data at bit rates of up to 18 Mbps for unmatched sound quality.Metadata is separate from the coding format and compressed audio samples, but stores relevant information about the audio waveform and provides control over the decoding process. Like the more common legacy codec Dolby Digital, Dolby TrueHD bitstreams carry program metadata. Sample depths up to 24 bits/sample and audio sample rates up to 192 kHz are supported. A Dolby TrueHD bitstream can carry up to 16 discrete audio channels. Dolby TrueHD is a lossless audio format, which means there is no fidelity lost when encoded onto Blu-ray. This lossless surround format is identical to the sound heard at the theater and comes across best via HDMI connection from Blu-ray players. Part 1: Brief Introduction to Dolby TrueHD and Dolby TrueHD Audio in Blu-ray Discĭolby TrueHD audio is one of the two best surround sound formats found in today’s Blu-ray-based home theater systems. Part 4: Comparison between 3 Blu-ray to MKV Converters.
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