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ENGLISH
The stereo CD is a 16-bit medium with sampling at 44.1 kHz.
Professional audio has been 20- or 24-bit for some time, and there is
increasing interest in higher sampling rates both for recording and for
delivery into the home. Greater bit depths provide extended dynamic
range. Higher sampling rates allow wider frequency response and the
use of anti-alias and reconstruction filters with more favorable aural
characteristics.
DTS 96/24 allows for 5.1channel sound tracks to be encoded at a rate
of 96kHz/24bits on DVD-Video titles.
When DVD-video appeared, it became possible to deliver 24-bit, 96
kHz audio into the home, but only in two channels, and with serious
limitations on picture. This capability has had little use.
DVD-audio allows 96/24 in six channels, but a new player is needed,
and only analog outputs are provided, necessitating the use of the D/A
converters and analog electronics provided in the player.
DTS 96/24 offers the following:
1. Sound quality transparent to the original 96/24 master.
2.Full backward compatibility with all existing decoders. (Existing
decoders will output a 48 kHz signal)
3. No new player required: DTS 96/24 can be carried on DVD-video, or
in the video zone of DVD-audio, accessible to all DVD players.
4.96/24 5.1-channel sound with full-quality full-motion video, for
music programs and motion picture soundtracks on DVD-video.
Dolby Digital identifies the use of Dolby Digital (AC-3) audio coding for
such consumer formats as DVD and DTV. As with film sound, Dolby
Digital can provide up to five full-range channels for left, center, and
right screen channels, independent left and right surround channels,
and a sixth ( ".1") channel for low-frequency effects.
Dolby Surround Pro Logic II is an improved matrix decoding
technology that provides better spatiality and directionality on Dolby
Surround program material; provides a convincing three-dimensional
soundfield on conventional stereo music recordings; and is ideally
suited to bring the surround experience to automotive sound. While
conventional surround programming is fully compatible with Dolby
Surround Pro Logic II decoders, soundtracks will be able to be
encoded specifically to take full advantage of Pro Logic II playback,
including separate left and right surround channels. (Such material is
also compatible with conventional Pro Logic decoders.)
Dolby Digital EX creates six full-bandwidth output channels from 5.1-
channel sources. This is done using a matrix decoder that derives
three surround channels from the two in the original recording. For
best results, Dolby Digital EX should be used with movies soundtracks
recorded with Dolby Digital Surround EX.
Manufactured under license from Dolby Laboratories. “Dolby”, “Pro
Logic”, and the double-D symbol are trademarks of Dolby
Laboratories.
Circle Surround II (CS-II) is a powerful and versatile multi-channel
technology. CS-II is designed to enable up to 6.1 multi-channel
surround sound playback from mono, stereo, CS encoded sources
and other matrix encoded sources. In all cases the decoder extends it
into 6 channels of surround audio and a LFE/subwoofer signal. The
CS-II decoder creates a listening environment that places the listener
“inside” music performances and dramatically improves both hi-fi
audio conventional surround-encoded video material. CS-II provides
composite stereo rear channels to greatly improve separation and
image positioning – adding a heightened sense of realism to both
audio and A/V productions.
CS-II is packed with other useful feature like dialog clarity (SRS Dialog)
for movies and cinema-like bass enrichment (TruBass). CS-II can
enable the dialog to become clearer and more discernable in movies
and it enables the bass frequencies contained in the original
programming to more closely achieve low frequencies – overcoming the
low frequency limitations of the speakers by full octave.
SRS Circle Surround II, SRS Dialog, SRS TruBass, SRS and
symbol are trademarks of SRS Labs, Inc.
SRS Circle Surround II, SRS Dialog and SRS TruBass technology are
incorporated under license from SRS Labs, Inc.