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DTS-ES Extended
Surround
is a new multi-channel
digital
signal format developed
by Digital Theater Systems
Inc
While offering
high compatibility
with
the conventional
DTS Digital Surround
format,
DTS-ES Extended
Surround gready improves the 3BO-degree surround impression
and space expression thanks to fur[her expanded
surround
signals
This format has been used professionally
in movie theaters
since 1999
In addition to the 51 surround channels (FL, FR, C, SL, SR and LFE), DTS-ES Extended Surround also offers the
SB (Sunound
Back, sometimes
also referred to as "surround
center")
channel for sunound playback with a total
of 61 channeJs
DTS-ES Extended
Surround includes two signal formats with different
surround
signal recording
methods,
as described below
•
DTS-ES
TM
Discrete
6.1
DTS-ESTM
Discrete 61 is the newest recording format
With it, all 61 channeJs (including the SB channel)
are recorded
independently
using a digital discrete system
The main feature of this format is that because
the SL, SR and SB channels are fully independent,
the sound can be designed with total freedom
and it is
possible to achieve a sense that the acoustic images are moving about freely among the background
sounds
surrounding
the listener from 360 degrees
Though maximum
per[ormance
is achieved when sound tracks recorded with this system
are played using
a DTS-ES decode_, when played with a conventional
DTS decoder the SB channel signals are automatically
down-mixed
to the SL and SR channels,
so none of the signal components
are lost
•
DTS-ES
TM
Matrix
6.1
With this format,
the additional
SB channel signals undergo matrix encoding
and are input to the SL and SR
channels beforehand
Upon playback they are decoded to the SL, SR and SB channels
The performance
of the encoder
used at the time of recording
can be fully matched
using a high precision
digital matrix
decoder developed
by DTS, thereby achieving surround
sound more faithful
to the producer's
sound design
aims than with conventional
51- or 6 1-channel systems
In addition,
the bit stream format
is 100% compatible
with conventional
DTS signals, so the effect
of the
Matrix 6I format can be achieved even with 5 t-channel
signal sources
Of course it is also possible to play
DTSES Matrix 61 encoded sources with a DTS 5 1-channel decoder
When DTS-ES Discrete 61 or Matrix 6I
encoded sources are decoded with a DTS-ES decoder, the format
is automatically
detected upon decoding
and the optimum playing mode is selected
However,
some Matrix
61 sources may be detected
as having a 5 t-channel
format, so the DTSES Matrix 61 mode must be set
manually to play these sources
(For instructions
on selecting
the surround
mode, see page 301
The DTS-ES decoder
includes another function,
the DTS Neo:6 surround
mode for 6 1-channel playback of
digital PCM and analog signal sources
•
DTS Neo:6 TMsurround
This mode applies conventional
2-channel signals to the high precision digital matrix decoder
used for DTS-
ES Matrix 61
to achieve 6 1-cbannel
surround playback¸
High precision input signal detection
and matrix
processing
enable full band reproduction
(frequency
response
of 20 Hz to 20 kHz or greater) for all 6I
channels,
and separation between
the different
channels is _mproved to the same level as that of a digital
discrete system¸
DTS Neo:6 surround
includes two modes for selecting
the optimum
decoding for the signal source¸
•
DTS Neo:6 Cinema
This
mode
is optimum
for playing
movies
Decoding
is per[ormed
with
emphasis
on separation
performance
to achieve the same atmosphere
with g-channel sources as with 6 1-channel sources
This mode is effective for playing sources recorded in conventional
surround
formats as well, because the
in-phase component
is assigned mainly to the center channel (C) and the reversed
phase component
to
the surround
(SL, SR and SB channels)
•
DTS Nee:6 Music
This mode is suited mainly for playing music
Changes in the sound qualify are reduced by decoding with
emphasis on the front channel signals {FL and FRI, and a natural sense of expansion _s g_ven to the sound
field by the effect
of the surround
signals
output
from the center
(C) and surround
(SL, SR and SB)
channels
The sampling frequency, number of bits and number of channels used for recording of music, etc,
in studios has
been increasing
in recent years, and there are a growing
number
of high quality signal sources,
including
96
kHd24 bit 5 1-channel sources
For example, there are high picture/sound
quality DVD video sources with 96 kHz/24 bit stereo PCM audio tracks
However,
because the data rate for these audio tracks is extremely
high, there are limits to recording them on
two channels
only, and since the quality of the pictures
must be restricted
it is common
to only include still
pictures
In addition,
96 kHz/24 bit 5 1-channel surround
is possible with
DVD audio sources, but DVD audio players are
required to play them with this high quality
DTS 96/24 is a multi-channel
digital signal format developed
by Digital Theater Systems Inc in order to deal with
this situation
Conventional
surround formats used sampling frequencies
of 48 or 44 1 kHz, so 20 kHz was about the maximum
playback signal frequency
With DTS 96/24, the sampling frequency
is increased to 96 or 882 kHz to achieve a
wide frequency
_ange of over 40 kHz
In addition,
DTS 96/24 has a resolution of 24 bits, resulting
in the same frequency
band and dynamic lange as 96
kHd24 bit PCM
As with conventional
DTS Surround,
DTS 96/24 is compatible
with
a maximum
of 51
channels,
so sources
recorded
using DTS 96/24 can be played in high sampling frequency,
multiple
channel audio with
such normal
media as DVD videos and CDs
Thus, with DTS 96/24, the same 96 kHz/24 bit muki-channel
surround sound as with
DVD-Audio can be achieved
while
viewing
DVD-Video
images
on a conventional
DVD-Video
player
{_11
Furthermore,
with
DTS 96/24
compatible
CDs, 882 kHz/24 bit multi-channel
surround
can be achieved using normal CD/LD players ( _ 1 )
Even with
the high quality
multFchannel
signals, the recording
time is the same as with
conventional
DTS
surround sources
What's
more, DTS 96/24 is fully compatible
with the conventional
DTS surround
format,
so DTS 96/24 signal
sources can be played with a sampling frequency of 48 kHz or 441 kHz on conventional
DTS or DTS-ES surround
decoders
( ÷ 2)
1 :
A DVD player with DTS digital output capabilities
(for CD/LD players, a player with digital outputs
for
conventional
DTS CDs/LDs) and a disc recorded in DTS 96/24 are required
2: The resolution is 24 or 20 bits, depending
on the decoder
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