Dolby Truehd; Dts Digital Surround - Yamaha RX-V663 Owner's Manual

■ Dolby Surround
Dolby Surround uses a 4-channel analog recording system to
reproduce realistic and dynamic sound effects: 2 front left and
right channels (stereo), a center channel for dialog (monaural),
and a surround channel for special sound effects (monaural). The
surround channel reproduces sound within a narrow frequency
range. Dolby Surround is widely used with nearly all video tapes
and laser discs, and in many TV and cable broadcasts as well. The
Dolby Pro Logic decoder built into this unit employs a digital
signal processing system that automatically stabilizes the volume
on each channel to enhance moving sound effects and
directionality.

■ Dolby TrueHD

Dolby TrueHD is an advanced lossless audio technology
developed for high-definition disc-based media including HD
DVD and Blu-ray Disc. Selected as a mandatory audio standard
for HD DVD and as an optional audio standard for Blu-ray Disc,
this technology delivers sound that is bit-for-bit identical to the
studio master, offering a high-definition home theater experience.
Supporting bitrates up to 18.0 Mbps, Dolby TrueHD can carry up
to 8 discrete channels of 24-bit/96 kHz audio simultaneously.
Supported by HDMI version 1.3 and designed for the optical disc
players and AV receivers/amplifiers of the future, Dolby TrueHD
also remains fully compatible with the existing multichannel
audio systems and retains the metadata capability of Dolby
Digital, allowing dialog normalization and dynamic range
control.
■ DSD
Direct Stream Digital (DSD) technology stores audio signals on
digital storage media, such as Super Audio CDs. Using DSD,
signals are stored as single bit values at a high-frequency
sampling rate of 2.8224 MHz, while noise shaping and
oversampling are used to reduce distortion, a common occurrence
with very high quantization of audio signals. Due to the high
sampling rate, better audio quality can be achieved than that
offered by the PCM format used for normal audio CDs.
■ DTS 96/24
DTS 96/24 offers an unprecedented level of audio quality for
multi-channel sound on DVD video, and is fully backward-
compatible with all DTS decoders. "96" refers to a 96 kHz
sampling rate compared to the typical 48 kHz sampling rate. "24"
refers to 24-bit word length. DTS 96/24 offers sound quality
transparent to the original 96/24 master, and 96/24 5.1-channel
sound with full-quality full-motion video for music programs and
motion picture soundtracks on DVD video.

■ DTS Digital Surround

DTS digital surround was developed to replace the analog
soundtracks of movies with a 6.1-channel digital sound track, and
is now rapidly gaining popularity in movie theaters around the
world. DTS, Inc. has developed a home theater system so that you
can enjoy the depth of sound and natural spatial representation of
DTS digital surround in your home. This system produces
practically distortion-free 6.1-channel sound (technically, front
left and right, center, surround left and right, and LFE 0.1
(subwoofer) channels for a total of 5.1 channels). This unit
incorporates a DTS-ES decoder that enables 6.1-channel
reproduction by adding the surround back channel to the existing
5.1-channel format.
■ DTS Express
DTS Express is an advanced audio technology for the optional
feature on Blu-ray Disc or HD DVD, which offers high-quality,
low bit rate audio optimized for network streaming, and Internet
applications. DTS Express is used for the Secondary Audio
feature of Blu-ray Disc or the Sub Audio feature of HD DVD.
These features deliver audio commentaries (for example, the
additional commentaries made by the director of a film) on
demand by the users via the Internet, etc. DTS Express signals are
mixed down with the main audio stream on the player
component, and the component sends the mixed audio stream to
the AV receivers/amplifiers via digital coaxial, digital optical, or
analog connections.
■ DTS-HD High Resolution Audio
DTS-HD High Resolution Audio is an high resolution audio
technology developed for high-definition disc-based media
including HD DVD and Blu-ray Disc. Selected as an optional
audio standard for both HD DVD and Blu-ray Disc, this
technology delivers sound that is virtually indistinguishable from
the original, offering a high-definition home theater experience.
Supporting bitrates up to 3.0 Mbps for HD DVD and 6.0 Mbps
for Blu-ray Disc, DTS-HD High Resolution Audio can carry up
to 7.1 discrete channels of 24-bit/96 kHz audio simultaneously.
Supported by HDMI version 1.3 and designed for the optical disc
players and AV receivers/amplifiers of the future, DTS-HD High
Resolution Audio also remains fully compatible with the existing
multichannel audio systems that incorporate DTS Digital
Surround.
■ DTS-HD Master Audio
DTS-HD Master Audio is an advanced lossless audio technology
developed for high-definition disc-based media including HD
DVD and Blu-ray Disc. Selected as a mandatory audio standard
for both HD DVD and Blu-ray Disc, this technology delivers
sound that is bit-for-bit identical to the studio master, offering a
high-definition home theater experience. Supporting bitrates up to
18.0 Mbps for HD DVD and up to 24.5 Mbps for Blu-ray Disc,
DTS-HD Master Audio can carry up to 7.1 discrete channels of
24-bit/96 kHz audio simultaneously. Supported by HDMI version
1.3 and designed for the optical disc players and AV receivers/
amplifiers of the future, DTS-HD Master Audio also remains
fully compatible with the existing multichannel audio systems
that incorporate DTS Digital Surround.
■ HDMI
HDMI (High-Definition Multimedia Interface) is the first
industry-supported, uncompressed, all-digital audio/video
interface. Providing an interface between any source (such as a
set-top box or AV receiver) and an audio/video monitor (such as a
digital television), HDMI supports standard, enhanced or high-
definition video as well as multi-channel digital audio using a
single cable. HDMI transmits all ATSC HDTV standards and
supports 8-channel digital audio, with bandwidth to spare to
accommodate future enhancements and requirements.
When used in combination with HDCP (High-bandwidth Digital
Content Protection), HDMI provides a secure audio/video
interface that meets the security requirements of content
providers and system operators. For further information on
HDMI, visit the HDMI website at
"http://www.hdmi.org/".
Glossary
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