Ensemble Designs BrightEye 3 Bedienungsanleitung

This user guide provides detailed information for using the BrightEye™ 3

Analog to SDI Converter with Time Base Corrector and Frame Sync.

The information in this user guide is organized into the following sections:

• Product Overview

• Functional Description

• Applications

• Rear Connections

• Operation

• Front Panel Controls and Indicators

• Using The BrightEye Control Application

• Warranty and Factory Service

• Specifications

• Glossary

BrightEye-1

Analog to SDI

Converter with

TBC and Frame Sync

User Guide

Revision 4.0 SW v1.0.8

ENSEMBLE

DESIGNS

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

The TBC/Frame Synchronizer performs time base correction and synchronization

on its input signal (either analog or digital) to conform its timing to the house

reference provided on the external reference input (Ref In). This synchronizing

function will automatically align the timing of the converter output so that each

new video frame begins at exactly the same time as it does on the reference

input. Furthermore, since the original input to the converter may be non-syn-

chronous to the reference, the input video may be running slightly fast or slow

with respect to the reference. The synchronizer corrects for this by buffering the

signal through a memory FIFO which can hold up to one frame of video.

The output of the TBC/Frame Synchronizer is serialized as a 270 Mb/s bitstream

and feeds the electrical BNC connector.

BrightEye 3 is powered by a 12 volt DC universal power supply. This power

supply can accept an input voltage between 90 and 230 volts, at 50 or 60 Hertz. It

uses a standard IEC line cord and can be used anywhere in the world. It is

normal for the converter to be quite warm to the touch when operating.

BrightEye-3

Bar

Generator

12-bit

Video A-D

Converter

and

Decoder

SDI

Deserializer

SDI Out

Reference In

Cpst, Y In

Pr, C In

TBC/

Frame Sync Serializer

Video Select

TBC On/Off

Processing

Controls

Gain Adjust

Front Panel or BrightEye PC Controls

Proc

Amp

BrightEye 3 Functional Block Diagram

BrightEye 3 Analog to SDI Converter with TBC/FS

APPLICATIONS

The versatility of BrightEye 3 can be utilized in any number of different applica-

tions where conversion of composite/Y/C and component analog video to SDI is

required.

Analog to SDI/Optical Conversion and Distribution

One application, shown in the illustration below, utilizes the full functionality of

BrightEye 3 by converting an output from a consumer VCR to an SDI signal for

feeding a non-linear editing system. The use of a reference input also allows the

converted signal to be synchronous with the house reference.

BrightEye-4

BrightEye 3

House Ref

Non-Linear

Editor

SDI Out

Cpst In

Ref In

Consumer

VCR

BrightEye 3 Application

REAR CONNECTORS

All connections to the BrightEye converter are made on the rear of the unit.

Refer to the illustration below.

Power Connection

Connect a modular power supply to the 12 volt DC power input connection on the

far left. Use the locking ring to secure it.

USB Connector

The USB connector is used to provide more comprehensive control, diagnostics,

and upgrades to the unit from a PC or Mac. Use the BrightEye Control applica-

tion included on CD-ROM to make adjustments as described in the OPERATION

section of this user guide.

Input/Output BNCS

There are five rear BNC connectors which are used as follows:

SDI Out

The Serial Digital Component output of the converter is presented on this

connector. This output conforms to the ITU-R 601 standard for serial digital

video, with SMPTE 259M serialization at 270 Mb/s.

Pb In

This is an internally terminated, 75 ohm input for the following:

• Beta or SMPTE – Pb input

Pr, C In

This is the internally terminated, 75 ohm input for the following format signals:

• Beta or SMPTE – Pr (Y-R) input

• S-Video (composite) – C input

BrightEye-5

BrightEye 3 Rear Connectors

BrightEye 3 Analog to SDI Converter with TBC/FS

BrightEye-6

Cpst, Y In

This is the internally terminated, 75 ohm input for one of the following signal

formats:

• Composite (Cpst) – composite input

• S-Video (composite) – Y input

• Beta or SMPTE – Y input

Ref In

The reference input connector accepts a composite video signal which is used as

the genlock and timing reference for the internal TBC/Frame Synchronizer.

Typically the reference signal would be Color Black or Color Bars fed from a

master sync generator. This is an internally terminated 75 ohm input.

BrightEye-7

OPERATION

Control and operation of the BrightEye 3 converter is performed from the front

panel or with the BrightEye Control application.

Some control settings are only available with BrightEye PC or Mac. These parameters

cannot be monitored or controlled with the front panel.

Front Panel Controls and Indicators

The front panel of the converter, shown in the figure below, provides status indi-

cators and control over video input selection, TBC, and gain.

Status Indicators

The following status indicators are provided on the front panel:

Illuminates green when an input for the currently selected video format is

detected on the input connector. This indicator does not light when either of the

two internally generated test patterns are selected.

Ref (Reference)

Illuminates green when a reference video signal is present on the Ref In

connector.

Source Select

The currently selected video input will illuminate green.

TBC/Frame Sync

When illuminated green, the TBC/Frame Sync mode is enabled.

Gain

Illuminates green when gain is set to unity or red when gain is other than unity.

Pwr (Power)

Illuminates green when power is applied to the converter and the internal voltage

regulator is functioning correctly.

BrightEye 3 Front Panel

NOTE:

BrightEye 3 Analog to SDI Converter with TBC/FS

BrightEye-8

ADJUSTING PARAMETERS FROM THE FRONT PANEL

Use the Mode, Right Arrow, and Left Arrow buttons to select and adjust

parameters from the front panel.

Pressing the Mode button activates the front panel for editing and tabs between

each section of editable parameters.

Pressing the Right Arrow or Left Arrow advances the selection within a given

section of parameters, or increases (Right Arrow) or decreases (Left Arrow) the

value of a selected parameter.

The LED of an edited parameter will blink for 15 seconds, after which time its value is

stored in memory. If power is interrupted before this 15 second timeout period has

elapsed, the edited state will not be not saved.

The controls and their indicators are described below:

Source Select Mode

This control selects the video input with the following choices:

Cpst – Analog Composite Video

Y/C – S-Video Composite Video

Beta – Component Video in Beta format

SMPTE – Component Video in SMPTE format

Bars – Selects internal Color Bar Generator

ChkFld – Selects internal CheckField Generator

The green indicator under the selected source will be illuminated.

TBC/Frame Sync Mode

This control turns the TBC/Frame Sync function on/off. Use the left arrow to turn

it off, the right arrow to turn on. The indicator illuminates green when it is on.

Gain Mode

This control adjusts the overall gain of the analog video signals passing through

the converter. The right arrow will increase the gain, the left arrow will decrease

it. The indicator will illuminate green when the gain is set to its nominal or unity

setting. This is the setting which will produce correct digital output levels from

an analog input source which itself is at proper level. The indicator will show red

whenever the control is adjusted either higher or lower than the nominal setting.

The gain can be reset to nominal (green) by pressing both arrows simultaneously.

NOTE:

BrightEye-9

USING THE BRIGHTEYE CONTROL APPLICATION

The BrightEye PC and BrightEye Mac applications included on CD-ROM are

designed to allow you to configure and control the BrightEye 3 from a personal

computer. Installation and instructions for using this software application are

given in the PDF manual on disk. If the BrightEye 3 is connected to a computer

running this software, the following menus are available for controlling and mon-

itoring the unit.

Input Menu

• Input – select the type of input signal to the unit from the Input pulldown

as Composite,Y/C, Beta, SMPTE, SDI, Bars, or Checkfield.

• Comb Mode – use this control set the type of comb filtering desired from

3-Line or 5-Line.

• Setup Removal – use this control to indicate the presence of setup on the

input (in 525 mode only, grayed out in 625). Select On for setup removal or

Off for no setup removal.

• Signal Mute – the signal muting control affects the behavior of the module

when the video input (either analog or SDI) is lost or interrupted. Set the

control for one of the following conditions:

No Muting – nothing is done when the input is lost or intermittent. In this

case, the module may present a very disturbed output in response to an

intermittent input.

Mute on Noise – the output will go black if the input is lost.

Mute on Freeze – the output will freeze on the last image when the input

is lost.

BrightEye 3 Analog to SDI Converter with TBC/FS

The following status items are also reported for the unit:

• Input Pres – reports the presence and detected line rate of the video input.

•Ref Pres – reports the reference input status.

Proc Menu

A video processing amplifier allows the adjustment of parameters for the analog

input signal.

The Proc menu provides the following video processing controls:

• Gain – adjusts the overall gain of the analog video signals passing through

the converter from 50 to 150%. The front panel indicator will light green

when the gain is set to its nominal or unity setting.

This is the setting which will produce correct digital output levels from an

analog input source which itself is at proper level. The indicator will show

red whenever the control is adjusted either higher or lower than the

nominal setting.

• Chroma – adjusts the percentage of chroma from 50 to 150%. There is no

front panel control or indication of this setting.

• Pedestal – adjusts the pedestal level of the signal +/- 5 IRE.There is no

front panel control or indication of this setting.

•Hue– adjust the amount of hue +/- 90 degrees in 525 mode only. There is

no front panel control or indication of this setting.

All values can be reset to nominal by selecting the Default button next to

the control.

BrightEye-10

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