Cambridge Audio 650R Stereo Receiver User Manual


 
18
The 650R supports several music and home-cinema listening modes. The
output the 650R can provide, depends both on the source signal present, the
speaker setup selected and the decode mode selected. Before we describe
how to operate the 650R, below is a brief guide to the Surround Sound
formats that the 650R is compatible with for reference:
Dolby True HD
Dolby’s lossless audio technology developed primarily for high capacity Blu-
ray discs/players. Dolby True HD delivers theoretically bit-for-bit sound
identical to the studio master by the use of 100% lossless encoding. Previous
formats such as Dolby Digital 5.1 or EX have used lossy encoding where
some data (that is theoretically less audible) is always lost in the encoding
process to reduce the storage capacity needed on the disc. This is a new
format that supports up to eight (usually used as 7.1) full-range channels of
24-bit/96 kHz audio or two channels of 24/192 kHz via Blu-ray discs and is
not backwards compatible with earlier schemes. The format can either be
transmitted as a ‘bitstream’ to the 650R for internal decoding
(recommended) or can be decoded by some Blu-ray players internally and
sent to the 650R as multi-channel PCM. In both cases an HDMI connection
is required to the 650R 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 7.1 fully discrete channels compared to Dolby Digitals
5.1 (or 6.1 in its EX variant where the 6th channel is matrix encoded). These
Dolby Digital Plus bitstreams are not backward compatible with legacy Dolby
Digital decoders but require an AV Receiver developed to decode them (such
as the 650R) 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. The 650R is however fully compatible 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 the 650R) are able to use this difference
information to recreate a bit for bit lossless version of the original 7.1 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 7.1 fully discrete channels compared to
DTS’s 5.1 (or 6.1 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 7.1 version of DTS
which can be decoded by devices (such as the 650R) 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 extension 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 material, 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 connection from the source
equipment (Such as a DVD player) to the 650R.
Note: Dolby Digital and DTS formats can sometimes 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 material, 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 the
650R.
Surround sound modes
Video connection type
The 650R provides transcoding or up/down conversion between Composite,
S-Video and Component video and up only to HDMI format. This function is
very useful in that it allows for a single video connection type to be made to
the TV/Monitor even if different input video connection types are used for
different source inputs. As with the video inputs, the best output connection
type to make to the TV/Monitor is (in declining order of quality) HDMI then
Component, then S-Video then Composite.
When you set the Input Video type the 650R also automatically selects a
transcoding mode as shown in the table below:
This setting is remembered input by input.
* Only available where a HDMI input has been assigned to the source.
** Component video above standard definition (576i or 480i) cannot be
converted to Composite or S-Video.
Note: The 650R is unable to down-convert HDMI so if a HDMI source
connection is made to the 650R you must make a HDMI output connection
to the TV as you might expect to view this source.
In all cases input by input, you need to tell the 650R which video type you are
using for the source.
Select the ‘Video Input Setup’ menu. highlight each source in turn and select
either Video, S-Video, YPbPr (Component) or HDMI (if that source has been
assigned on HDMI input).
As well as for the main outputs the 650R also transcodes analogue video for
the Incognito Ready Zone 2/3 composite outputs (requires Incognito keypads
and PSU to be added see later section) so you are free to use any analogue
video input variant for sources you wish to see in Zone2/3.
Note: As the 650R is unable to downwards convert HDMI video to analogue
video if you wish to make an HDMI connection to the unit for the main
outputs and then watch the same source in Zones 2 and/or 3 you should
make an additional parallel analogue video connection from the same
source for use by Zone2/3.
Nearly all BD/DVD player etc. feature analogue video outputs independent of
their HDMI outputs making this a simple connection to make.
This setting can also be changed at any time without using the OSD by
pressing the Video Input Type button.
This cycles round the types of analogue video connections that can be made
on the 650R:
1. Composite Video (CVBS)
2. S-Video (S-VHS, Y/C)
3. Component Video (YCbCr / YPbPr, YUV)
4. HDMI (if assigned)
Video Input Setup
BD/DVD :HDMI1
VIDEO1 :HDMI2
VIDEO2 :HDMI3
VIDEO3 :Video
REC1 :Video
Return : [OSD]
4. Source setup continued
ACTIVE MONITOR/TV OUTPUTS
Composite S-Video Component HDMI
Composite
Direct Transcode Transcode Transcode
S-Video
Transcode Direct Transcode Transcode
Component
Transcode** Transcode** Direct Transcode
HDMI *
Direct Direct Direct Direct
SELECTED VIDEO INPUT TYPE