Grass Valley Performer-HD - Manual (Page 15)

Performer-HD Instruction Manual 1-1
Section
1
Overview
Introduction
Performer-HD has the full functionally of the Performer-SD with the added
ability to switch HDTV video signals.
Full bandwidth HDTV video signals are routed through a 10x1 video ma-
trix. The 10 Inputs and 1 Output will switch uncompressed serial digital
SMPTE 292M at 1.485 Gbps rate and in bypass (non-reclocking) mode will
handle data rates from 10 Mbps to 700 Mbps.
Audio signals are routed through two audio matrices of stereo AES/EBU
channels of 10x1 serial digital audio switching.
Figure 1-1. Performer-HD Router
High Definition Background
HDTV is a form of digital television, which for home delivery uses MPEG-2
compressed video and Dolby AC-3 compressed audio. HDTV contains at
least twice the resolution of existing analog broadcast television (NTSC,
PAL, and related formats) in both the horizontal and vertical directions
(400% total increased resolution). HDTV is also presented at a 16:9 aspect
ratio, compared to existing analog broadcast’s 4:3 ratio, providing 33%
more picture area.
Related to HDTV is HD serial digital video. For full resolution broadcast,
HD serial digital video is fed to an encoder at the broadcast station which
compresses the video, combines it with compressed audio, and passes the
resultant digital signal to the transmitter for public consumption.
A1
CH 1/2
A2
CH 3/4 Video
Grass Valley 1 2 3 4 5 6 7 8 9 10
Input Selection
Performer-HD
VAA
Breakaway/Protect Status/Display
V A1 CH1/2
On HD Vid
Present Reclock
Off
A2 CH2/3
A2
CH 3/4