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have used lossy encoding where some data (that is
theoretically less audible) is always lost in the encod-
ing process to reduce the storage capacity needed on
the disc. This is a new format that supports up to eight
(usually used as 5.1) full-range channels of 96kHz/24
bit audio or two channels of 192 kHz via Blu-ray discs
and is not backwards compatible with earlier schemes.
The format can either be transmitted as a (R)bit
stream! to TI 1000 HC for internal decoding (recom-
mended) or can be decoded by some Blu-ray players
internally and sent to TI 1000 HC as multi-channel
PCM. In both cases an HDMI connection is required
to TI 1000 HC and a suitable Blu-ray player as Dolby
True HD is only ever transmitted over HDMI.
Dolby Digital Plus
A new encoding scheme based on the original Dolby
Digital CODEC, but with enhancements to improve
coding efficiency and improve audio quality. Dolby
Digital Plus supports 5.1 fully discrete channels
compared to Dolby Digitals 5.1 (or 5.1 in its EX variant
where the 6th channel is matrix encoded). These
Dolby Digital Plus bitstreams are not backward com-
patible with legacy Dolby Digital decoders but require
an AV Receiver developed to decode them (such
as TI 1000 HC) and an HDMI connection as Dolby
Digital Plus is currently only transmitted over HDMI. It
is however a requirement that any Dolby Digital Plus
enabled Blu-ray player must also be able transform
the Dolby Digital Plus into a backwards compatible
Dolby Digital 5.1 output for playback on legacy Dolby
Digital systems. TI 1000 HC is however fully compat-
ible with Dolby Digital Plus.
DTS-HD Master Audio
A new lossless audio CODEC from DTS, rather than
being incompatible with earlier versions, DTS-HD
Master Audio is transmitted as an extension to a
normal DTS bitstream. A second embedded stream
is sent which contains the “difference” between the
original studio master and the lossy compressed DTS,
plus the two extra channels. DTS-HD Master Audio
enabled devices (such as TI 1000 HC) are able to use
this difference information to recreate a bit for bit loss-
less version of the original 5.1 data. Devices which do
not support the Master Audio extension simply decode
the original 5.1 DTS stream and ignore the Master
Audio extension providing backwards compatibility.
DTS-HD High Resolution Audio
Known also as DTS-HR an extension to the original
DTS audio format. DTS-HD High Resolution Audio
supports 5.1 fully discrete channels compared to
DTS’s 5.1 (or 5.1 in its DTS ES Matrix or DTS ES
Discrete variants). As with DTS-HD Master Audio a
second embedded stream is sent which contains the
“difference” between the original studio master and the
lossy compressed DTS, plus the two extra channels,
however in this case the extra stream is also formed
by lossy compression. Effectively this is a 5.1 version
of DTS which can be decoded by devices (such as
TI 1000 HC) which are able to decode DTS-HD High
Resolution Audio. Devices which do not support the
High Resolution extension simply decode the original
5.1 DTS stream and ignore the High Resolution exten-
sion providing backwards compatibility.
Dolby Digital
Known also as DD (3/2) or DD 5.1, provides (up to)
5.1 output from suitable encoded Dolby Digital mate-
rial, with 5 main channels (Front Left, Front Right,
Centre, Surround Left, Surround Right) and a Low
Frequency Effects Channel for the subwoofer, all
discretely encoded. Decoding Dolby Digital requires
a Dolby Digital encoded DVD disc and a digital con-
nection from the souce equipment (Such as a DVD
player) to TI 1000 HC.
Note
: Dolby Digital and DTS formats can some-
times carry less channels than their maximum such
as Dolby Digital (2/0) which means a Dolby Digital
encoded signal which is actually only carrying a two
channel stereo signal (other channels inactive).
DTS
Known also as DTS (3/2) or DTS 5.1, DTS provides
(up to) 5.1 output from suitable encoded DTS mate-
rial, with 5 main channels (Front Left, Front Right,
Centre, Surround Left, Surround Right) and a Low
Frequency Effects Channel for the subwoofer, all
discretely encoded. Decoding DTS requires a suitably
encoded DTS disc and a digital connection from the
source equipment to TI 1000 HC.
Dolby Digital EX
Known also as DD (3/3) or DD 5.1, an enhanced form
of Dolby Digital. On top of the discretely encoded
5.1 channels DD EX provides an extra 6th channel
(Surround Back, giving 5.1) matrix encoded into the
rear surrounds for greater image depth and more solid
sound localisation behind the listener. DD EX requires
a DD EX encoded disc. DD EX is backwards compat-
ible with DD 5.1 decoding. If DD EX is decoded as
normal DD the Surround Back signal will be present
in both Left and Right Rear Surrounds (forming a
phantom rear centre). It can also be decoded as 5.1
by sending the Surround Back decode to both the
Surround Back Left and Right speakers (forming two
mono Back Surrounds).
