Glossary / Useful Information - T+A VSP 1250 R Betriebsanleitung

Aspect Ratio
The 'aspect ratio' is a measure of the proportions of the
screen format, i.e. its width : height ratio. The most
common aspect ratios are 4:3 (the earlier standard
television format), 16:9 (a picture format frequently used
for DVDs), and 21:9, which is known as the 'Cinema
format'.
DVI
DVI is a digital interface for transferring high-resolution
(High Definition) picture signals. In contrast to HDMI, DVI
cannot carry sound signals. On the other hand, the DVI
interface features higher-quality, heavy-duty connectors
which can accept higher-quality cables more easily than
HDMI connectors. Due to the better connectors and
cable quality we recommend a DVI connection if you are
obliged to use long cables between devices, provided
that no sound is required (e.g. with projectors).
The HDMI interface transfers pictures without loss and in
unprecedented quality.
HDCP
= High Definition Content Protection
This is a copy protection technique which is designed to
prevent illegal copying of picture and sound signals.
Wherever a connection is made, the devices participating
in the transfer must authenticate each other, and
exchange and verify details of the transfer format and the
method of data encoding in use. This process absorbs a
certain amount of time, with the result that it takes a few
seconds for a picture to appear on the monitor after the
system is switched on. If you have been working with
analogue video signals and are accustomed to switching
over instantly, please note that this is not possible with
HDCP protected signals. The HDCP copy protection is a
legal requirement for the transfer of high definition picture
and sound formats.
HDMI
HDMI is a digital interface for transferring high-resolution
(High Definition) picture and sound formats. The HDMI
interface transfers pictures
unprecedented quality.
Hue
The term HUE refers to the colour balance of a picture.
By adjusting the Hue value you can alter the overall
colour balance of a picture, for example, towards red or
green, in order to compensate for colour casts in the
monitor or source device. If you do not have access to a
device for calibrating the picture settings, we recommend
that you adjust the Hue value in the Setup menu of the
VSP 1250 R separately for each source, e.g. using real
pictures which include skin tones, so that you can judge
the most natural colour balance for yourself.

Glossary / Useful Information

= High Definition Media Interface
without loss
Lip Synchronisation (Lip-Sync)
Every audio and video device requires a certain amount
of time to process the audio and video data it receives.
This means that a certain time (delay) elapses before the
signals appear at the output, or can be reproduced by the
loudspeaker or video monitor. In complex home cinema
systems the result may then be that the delay for the
audio and video signals is not identical, and a disturbing
difference occurs between the timing of the sound and
the picture. To compensate for this difference, many
surround decoders (including the SR 1535 R and
DD 1535 R) offer the facility to adjust the audio signal
delay to match the delay of the video signals. This
function is known as lip synchronisation, or simply lip-
sync.
If the inherent delay of the video processor and the video
monitor are known, then it is a simple matter to adjust lip
synchronisation accurately. The delay data is usually
included in the Specification of the machines concerned.
You then simply set the sound delay to the sum of these
two values in the CONFIGURATION / SPECIAL
FUNCTIONS menu of the SR 1535 R or DD 1535 R. The
sound and picture will then be synchronised perfectly to
each other.
Note:
If the user manual of your video monitor does not provide
data for the delay time, we suggest to use an initial
setting of 150 ms for the Lip-sync. delay. This is a good
starting point for an exact adjustment.
Native resolution
The term native resolution refers to the number of picture
elements (pixels), or dots, which are displayed by a
particular video monitor. The native resolution is normally
stated in your monitor's instruction manual.
When selecting the output resolution of the VSP 1250 R
it is best to choose the resolution which is closest to the
actual native resolution of your monitor. For example, it
makes no sense for the VSP 1250 R to generate video
signals in the 1080p format (1920x1080 pixels) if the
monitor can only resolve 1280x720 pixels in its native
and in
format, as the monitor would then need to re-calculate
the pictures, reducing the picture back to the actual
resolution of the monitor. In such cases an output
resolution of 720p will be sure to provide better pictures.
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