Grass Valley Performer-HD - Manual (Page 16)

1-2 Performer-HD Instruction Manual
Section 1 — Overview
The biggest technical difference between standard definition (SD) serial
digital video and HD serial digital video is the data rate. HD video has a
data rate 5.5 times (1.485 GBits/sec) that of SD video. HD video intercon-
nections use 75 ohm coax, like SD video, but the correct cables must be used
and cable runs will be limited. Connectors and patch panels must be spe-
cially constructed for HD rates to minimize signal degradation.
Several different HD video resolution and frame rates exist. Probably the
most widely supported formats are 1920x1080 interlaced at 30 frames per
second (1080i) , and 1280x720 progressive (720p) at 60 frames per second.
System Level Architecture
System Level Architecture addresses the configuration of your system and
how the signal flows.
The Performer-HD router is a three matrix frame. The video matrix switch-
es 10 Inputs to a single dual Output. The two audio matrices each switch 10
Inputs to a single 2 channel stereo Output.
The unit is a captive frame that does not require additional cooling.
Figure 1-2. Performer-HD System Signal Flow
Video
Audio1
AES
Audio2
AES
10
Inputs
10
Inputs
10
Inputs
1
Output
1
Output
1
Output
Dual (Identical)
Signals
Channel 1
Channel 3
Channel 4
Channel 2
Dual (Identical)
Signals
Dual (Identical)
Signals