BrightEye 3 Analog to SDI Converter with TBC/FS
PRODUCT OVERVIEW
The BrightEye™ 3 Converter is a Time Base Corrector/Frame Synchronizer with
composite, component and Y/C inputs. Input signals are digitized to 12 bits of res-
olution and time base corrected by a noise tolerant tracking circuit. An external
reference input allows genlock to a a timing reference such as color black.
BrightEye 3 is great for such applications as capturing consumer VCRs into non-
linear editing systems.
Input selection, gain controls, and TBC enable is provided through the front panel
interface. Input and reference presence are indicated through front panel LEDs.
Control and monitoring can also be done using the BrightEye Control application
from a personal computer with USB support.
Signal I/O and power is supplied to the rear of the unit. It is powered by a
modular style power supply.
A glossary of commonly used video terms is provided at the end of this guide.
FUNCTIONAL DESCRIPTION
The BrightEye 3 converter can perform analog to digital conversion on a variety
of television signal formats, in both the 525/60Hz (NTSC) and 625/50Hz (PAL)
line standards. The converter supports the NTSC and PAL composite standards,
Y/C, and color difference analog component formats along with serial digital (SDI)
video.
As shown in the block diagram on the next page, analog composite video is fed to
the converter on a single BNC connector at 1 volt p-p levels (sync tip to peak
white). The analog signal is clamped (DC restored) and digitized. This digital rep-
resentation of the original signal is decoded into luminance and color difference
component form using an adaptive comb filter.
Component video inputs in the SMPTE or Beta formats of Luminance (Y), and
color difference (R-Y or Pr, and B-Y or Pb) enter the converter through three BNC
connectors. They are digitized and clamped and then gain-scaled to component
digital levels.
In all cases of analog video input, the resultant digital signal conforms to the
ITU-R 601 standard. This is a 4:2:2 component digital signal with a 27 MHz
sampling rate. The overall amplitude of the signal can be adjusted with the gain
control. This digital signal is fed to the TBC/Frame Synchronizer.
BrightEye-2