Digital Signal Processing Reference
In-Depth Information
9
VIDEO INTERFACES
CHAPTER OUTLINE
9.1 SDI 61
9.2 Display Port
61
9.3 HDMI
63
9.4 DVI 63
9.5 VGA 64
9.6 CVBS 64
9.7 S-Video 64
9.8 Component Video
65
There are several common video interfaces, which are used
both in the broadcast industry and among consumer products.
These are briefly described below:
9.1 SDI
This is a broadcast industry standard, used to interconnect
a variety of professional equipment in broadcast studios and
mobile video processing centers (like big truck trailers seen at
major sports events). SDI stands for “serial data interface”, which
is not very descriptive. It is an analog signal, modulated with
digital information. This is usually connected using a co-axial
cable, normally BNC type as in
Figure 9.1
.
It is able to carry all of the data rates listed in
Table 9.1
and
dynamically switch between them. Most FPGAs and broadcast
ASICs can interface directly with SDI signals.
9.2 Display Port
Display port is a next-generation video-display interface. It
uses from one to four lanes of video data
each lane is a single
wire, with the clock embedded in the serialized data. Each lane
operates at 1.6 Gbps, 2.7 Gbps, and in latest versions, 5.4 Gbps. It
also features an auxiliary channel for low-rate two-way configu-
ration and status information between the video source and
e
