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S054_075_(GB)_Video 22.07.2005 13:31 Uhr Seite 68<br />
Digital video signal connections<br />
The digital video signals are transmitted via very different types of connection. Using the appropriate <strong>Hama</strong> cables and adapters<br />
allows you to connect even the most diverse jacks together and to make the proper cable connection.<br />
i<br />
AV <strong>Cables</strong><br />
Firewire/IEEE 1394/iLink/Iynx* connection<br />
4-, 6- or 9-pin models<br />
Digital video interface for quickly transmitting<br />
digital video data to a PC. Data transfer with<br />
up to 400 Mbit/s.<br />
* diverse names according to the manufacturer<br />
Max. cable length: approx. 4.5 m<br />
Data transfer with 1394a: max. 400 Mbit/s<br />
Data transfer with 1394b: max. 800 Mbit/s<br />
1394b is downward compatible to 1394a<br />
DVI connection<br />
Digital Visual Interface<br />
Is used for the transmission of digital video and graphics data signals.<br />
As DVI comes originally from the computer technology, an analogue VGA signal<br />
was transferred as an interim so that signals could also be sent to cathode ray<br />
tube monitors.<br />
Flat screens (TFT, plasma, LCD) work with pure digital signal transmission and<br />
through the DVI specification, a uniform standard has been created for this.<br />
The signals can now be transferred from the source to the monitor in their original<br />
form – without repeated digital analogue conversions.<br />
USB A connection<br />
USB = Universal Serial Bus<br />
Digital universal interface which is more and<br />
more often used for transmitting digital video<br />
data to a PC. Data transfer with up to 480<br />
Mbit/s (USB 2.0 standard).<br />
USB A: flat design, it is always on the computer<br />
side (upstream)<br />
USB B connection<br />
Almost square in shape, it is reserved for peripherals<br />
(camera, scanner etc.) (downstream)<br />
Apart from digital video and graphics data, control signals are transferred as well;<br />
the monitor informs the source which max. resolution and which picture format is<br />
possible.<br />
DVI is upward compatible to HDMI as both transfer their data with the same TDMS<br />
standard.<br />
The copy protection HDCP (High-bandwidth Digital Content) which is prescribed<br />
for HDMI is activated by means of control bits and prevents copies free of losses.<br />
The signal can only be coded and decoded through appropriate hardware chips<br />
in the source and on the display page.<br />
This one remains dark without HDCP decoder in the display; a display with DVI<br />
input should therefore absolutely be equipped with a HDCP decoder.<br />
HDMI connection<br />
High Definition Multimedia Interface<br />
This newly developed interface for the fully<br />
digital transmission of audio and video data<br />
has been specially introduced for the sector<br />
Home Entertainment. The data is put out<br />
with HDCP copy protection. HDMI works<br />
without data compression and shows<br />
therefore no loss of quality caused by the<br />
system – this is e.g. the case when it comes<br />
to FireWire/i.Link.<br />
Thanks to its high bandwidth, data transfer<br />
rates up to 5 Gbit/s, HDMI can transfer all<br />
digital formats which one knows today:<br />
- Audio data with frequencies up to 192 kHz<br />
with 24 bit word length on 8 channels<br />
- Video data with bandwidth of 165 MHz.<br />
HDTV also shows no loss of quality.<br />
Apart from audio and video data, monitor<br />
control and remote control signals are also<br />
transferred via HDMI – this is also the case<br />
when it comes to DVI.<br />
M1DA or P&D connection<br />
111-DA: assignment: digital & analogue<br />
111-D: assignment: digital<br />
111-A: assignment: analogue<br />
M1DA = Multimedia 1 Display Adapter<br />
P&D = Plug & Display<br />
The connection integrates a DVI interface<br />
with integrated USB connection. Via the<br />
USB connection, remote control signals e.g.<br />
can be transmitted from a beamer to a PC<br />
or software updates to a beamer.<br />
Data transfer rate up to 1.65 Gbit/s.<br />
Max. resolution Single Link: 1600x1200 pixels<br />
Max. resolution Dual Link: 2048x1536 pixels<br />
DVI D-Single Link connection (18+1):<br />
D for digital<br />
Only suitable for digital signal connections.<br />
The Single Link model offers a TDMS Link<br />
with 3 data channels. Sufficient for a HDTV<br />
connection with an interlaced resolution<br />
of 1920 x 1080 pixels with 50 Hz picture<br />
frequency.<br />
DVI D-Dual Link connection (24+1):<br />
Only suitable for digital signal connections.<br />
Dual Link offers two TDMS with 6 data<br />
channels.<br />
Socket which is most frequently used.<br />
However, it does not always have to be fully<br />
assigned in a device!<br />
DVI I-Single Link connection (18+5):<br />
for integrated (digital and analogue)<br />
For digital Single Link connections and for<br />
analogue VGA connections.<br />
DVI I-Dual Link connection (24+5):<br />
For digital Dual Link connections and for<br />
analogue VGA connections.<br />
68 <strong>Hama</strong> September 2005<br />
BC = Blistercard
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