Snell Iqmdmo User manual

IQMDMO SECTION 40b

IQMDMOOPS 150403 Version 1 Issue 2 40b.1

IQMDMO MPEG-2 Decoder

with MOLE™ Output

Module Description

The IQMDMO is a full broadcast quality MPEG-2

decoder with MOLE™ output. It supports multi-

standard 4:2:2 and 4:2:0 video decoding (up to

MP@ML and 4:2:2 Profile@ML) on dual SDI

outputs. The decoder accepts both single and

multi-program transport streams (SPTS and

MPTS) on two selectable Asynchronous Serial

Interface (ASI) inputs. Frame-accurate genlocked

output synchronization is featured as standard.

Audio decoding of MPEG-1 Layer II and direct

pass-through of AC-3 streams are supported by up

to four unbalanced digital audio outputs.

Teletext received to DVB standard EN 300 472

may be inserted into the VBI of the SDI output in

accordance with ETS 300 706.

Standardized as SMPTE 319M and 327M,

MOLE™ Technology enables an MPEG-2 decoder

to pass the encoding decisions from the original

encoding to any subsequent encoder through the

SDI signal. MPEG signals decoded with the

IQMDMO can then be manipulated in the same

manner as SDI video, allowing edits, wipes,

crossfades and digital effects to be performed. It is

then possible to re-encode with a MOLE™-

compliant encoder using the original coding

decisions with no loss of quality. It also enables

transcoding to be more transparent and flexible

enough to handle any constant or variable bitrate

input, with 4:2:2 or 4:2:0 video.

The IQMDMO accepts all current standard

definition formats used by DVB, ATSC and ARIB.

Its reduced size provides a highly cost-effective

solution for both single and multi-channel video

decoding where space is limited (e.g. OB trucks).

Multi-channel capability makes the decoder fully

suited for broadcast play-out operations where

several MPEG feeds need to be switched and

mixed along with uncompressed sources using

conventional digital video studio equipment:

contribution, distribution, head-end, regional

affiliate systems, etc.

RollCall remote control and logging system is

available as standard, allowing video and audio

fault or warning conditions to be reported and

logged over RollCall.

As standard, a full frame genlocking synchronizer

allows the outputs to be locked to an external

analogue reference to allow simple installation.

Alternatively, the outputs can be locked to the

incoming MPEG time reference.

The card features four unbalanced digital audio

outputs (AES/EBU). The audio circuit is capable of

decoding up to four MPEG1 Layer I/II (ISO 13818-

3) simultaneously. It can also pass-through up to

four Dolby Digital AC-3 streams (SMPTE 340M).

Any of the four AES audio outputs can be selected

for embedding into the output video in accordance

with SMPTE 272M.

The two ASI input interfaces can be configured to

automatically select between the two inputs upon

input signal loss (e.g. broken cable) as well as

automatically invert the ASI input(s) in cases where

the ASI signal(s) has become inverted by some

external process

REAR PANEL VIEW

IQMDMO SECTION 40b

IQMDMOOPS 150403 Version 1 Issue 2 40b.2

Versions of the module cards available are:

IQMDMO-2A MPEG-2 Decoder with MOLE™ Output Double width module

Note that there are two styles of rear panels available. They are not interchangeable between the two

styles of enclosures. However, the cards may be fitted into any style of enclosure.

‘A’ Style Enclosure

Rear panels with the suffix A may only be fitted

into the ‘A’ style enclosure shown below.

(Enclosure order codes IQH3A-E-O, IQH3A-E-P,

IQH3A-N-O, IQH3A-N-P)

‘O’ Style Enclosures

Rear panels without the suffix A may only be fitted

into the ‘O’ style enclosures shown below.

setup

lock save

rec all

modules help

adjust

scro ll

power previous

return

home

cont rol

information

display

sele ct

power

(Enclosure order codes IQH1S-RC-O, IQH1S-RC-

AP, IQH1U-RC-O, IQH1U-RC-AP, Kudos Plus

Products)

power

OPEN

(Enclosure order codes IQH3N-O, IQH3N-P)

IQMDMO SECTION 40b

IQMDMOOPS 150403 Version 1 Issue 2 40b.3

BLOCK DIAGRAM

2x SDI

Output

Unbalanced

AES/EBU

Output 1

Unbalanced

AES/EBU

Output 2

Unbalanced

AES/EBU

Output 3

Unbalance

AES/EBU

Output 4

ASI

Input A

ASI

Input B

REF

Input

Loop

Thru

ollCall

///M

Features

•ATSC and DVB broadcast quality MPEG-2 decoder

•100% MOLE™ Technology compliant

•ASI MPEG Transformer Coupled Equalised Serial Inputs with selectable polarity invert

•Selectable lock mode: Video Genlock (black/composite reference 525/625) or MPEG Timestamps

•Controlled and crash freeze

•Up to 8 pairs of audio may be embedded into the video in accordance to SMPTE 272M

•Up to 4 Unbalanced AES Audio/Data outputs

•2 SDI Outputs carrying SMPTE 319M compliant MOLE™ data

•Automatic 625 and 525 operation

•EDH Insertion to (SMPTE RP165)

•Teletext insertion to ETS 300 706

•Pattern generation

•Test signal generator

•RollCall control system compatible

IQMDMO SECTION 40b

IQMDMOOPS 150403 Version 1 Issue 2 40b.4

TECHNICAL PROFILE

Features

Signal Inputs

ASI 1 and 2........................ ASI (270 Mbit/s) single and multi-

program transport streams (SPTS

and MPTS via BNC connector, to

CENELEC 50083-9.

Analog Reference .............. Black and Burst via BNC connector

Signal Outputs

Serial Digital Video x 2 ....... SDI to ITU-R

Rec.656/Rec.601(SMPTE259M)

with MOLE™ (SMPTE319M/327M)

AES/EBU Serial x 4............ Unbalanced AES/EBU Serial

Digital Audio Outputs

Specifications

MPEG Formats .................. 422P@ ML, MP@ML up to

25Mbit/sec, All 100% MOLE™

compatible

Serial Input Return Loss..... Better than -15 dB from 5 to

270MHz

Video Standards ................ To ITU-R Rec.656/Rec.601

(SMPTE259M) with MOLE™

(SMPTE319M)

Signal Output Level............ 800 mV ±10%

Output Return Loss ............ Better than -15 dB to 270 MHz

Output Jitter ....................... < 0.2UI

Audio Output Impedance ... Unbalanced 75 Ohm

Audio Output Signal level ... Unbalanced 1 V ±0.1 V pk to pk

Power Consumption

Module Power Consumption

18W max

IQMDMO SECTION 40b

IQMDMOOPS 150403 Version 1 Issue 2 40b.5

INPUTS AND OUTPUTS

ASI Inputs 1 and 2

The two independent ASI inputs to the unit are

made via these BNC connectors which terminate in

75 Ohms.

Analog Reference Input

These are the high impedance loop-through

connections via BNC connectors for a black burst

reference signal at standard level.

Dual SDI Outputs

These are the two combined SDI outputs of the

unit via BNC connectors to ITU-R

Rec.656/Rec.601.

Unbalanced AES/EBU Serial Digital Audio

Outputs 1-4

These are the four unbalanced AES/EBU serial

digital audio outputs of the unit via BNC

connectors.

IQMDMO SECTION 40b

IQMDMOOPS 150403 Version 1 Issue 2 40b.6

IQMDMO SECTION 40b

IQMDMOOPS 150403 Version 1 Issue 2 40b.7

CARD EDGE CONTROLS

LED INDICATORS

+PWR

When illuminated, this LED indicates that the

positive power supplies are present.

-PWR

When illuminated, this LED indicates that the

negative power supplies are present.

Input Loss

When illuminated, this LED indicates that no Input

signal is present.

Ref Loss

When illuminated, this LED indicates that there is

no Analogue input video reference on the

reference input.

Output OK

When illuminated, this LED indicates that the unit

is outputting valid video.

Video Output 525

When illuminated, this LED indicates that the

output video signal standard is 525 line; when not

illuminated the standard will be 625 line.

Active

This LED, when flashing, indicates that the card is

running correctly.

Error Occurred in the last hour

When illuminated, this LED indicates that an error

has occurred in the last hour.

Error Occurred in the last minute

When illuminated, this LED indicates that an error

has occurred in the last minute.

Error Present

When illuminated, this LED indicates that an error

has occurred.

IQMDMO SECTION 40b

IQMDMOOPS 150403 Version 1 Issue 2 40b.8

Operation From A PC Using RollCall Remote Control

Information

Every menu page shows the Information window

that consists of three lines for display of various

status information at a glance.

•Line 1: Displays abbreviated status for the

three items: input, lock, and output.

‘In’ shows:-

‘OK’ -for good input signal, or

‘??’ –for carrier only detected, or

‘**’ –for loss of input.

The lock text varies between ‘PCR’ & ‘Ref’

depending upon sync locking to MPEG or

video-reference respectively, and shows:-

‘OK’ –for good sync, or

‘??’ –for signal detect without lock, or

‘**’ –for bad sync lock.

The ‘Out’ shows:-

‘OK’ –for good video & audio output, or

‘A*’ –for good audio only, or

‘*V’ –for good video only, or

‘**’ –for bad video & audio.

•Line 2: Displays the name of the currently

selected program (in the selected format).

•Line 3: A carousel that alternates between

five different items of status information.

These are: MPEG Profile, TS bitrate, ES

bitrate, and language on audio outputs 1 & 2,

language on audio outputs 3 & 4. The MPEG

profile status displays, the profile (MP@ML or

422P@ML or *****), the picture dimensions

(XxY), and the standard (625 or 525 or 3:2)

Information

window

IQMDMO SECTION 40b

IQMDMOOPS 150403 Version 1 Issue 2 40b.9

Program/PMTs

This shows the services present in the transport

stream and the components that comprise each

one. It has the following fields:

Programs

This window presents the services available for

selection.

Lock program select – This controls the service

selection behaviour:

•When checked, only the selected service will be

decoded (when present) regardless of changes

to the transport stream.

•When unchecked, upon loss of the selected

service a new service will automatically be

selected for decode.

Program

This item will display the selected SI program

name.

Note that if the program is encrypted then the view

will toggle between the SI program name and the

text: ‘Encrypted’.

Program View

This field controls what is displayed in the

programs window. There are 3 options:

•Name Only - This causes the program name

descriptors to be shown (see illustration)

•Number Only - This causes the program

numbers to be displayed. This information is

extracted from the Program Association Table

(PAT).

•Both - This causes both the name and the

number to be displayed.

ES PIDS

This window shows the PID and type of all the

Elementary Streams that make up the program

selected.

PCR PID

This field shows the PID on which the PCR can be

found for the currently selected program.

TS ID

This field shows the Transport Stream ID for the

currently selected input.

PID Format (Radix)

This field allows the user to select the number

base for the display of program numbers and PIDs,

in decimal (Base 10 or Dec) or in hexadecimal

(Base 16 or Hex)

Program View Order

This allows the selection of the sorting order in

which the programs are displayed in the Programs

window. These can be selectively ordered by

name, by program number or by the order in which

they appear in the Programme Association Table

(PAT).

IQMDMO SECTION 40b

IQMDMOOPS 150403 Version 1 Issue 2 40b.10

INPUT MENU

This menu allows the selection and setup of the

ASI inputs.

The menu has the following fields:

Input Select

This field controls which of the 2 ASI inputs is

selected. The options are:

•Auto– When selected, this will automatically

select the input with a valid signal following the

priority order selected by the “Auto priority”

field.

•Input 1 – When selected, this will force the

selection of input 1 for the decoder.

•Input 2 - When selected, this will force the

selection of input 2 for the decoder.

Auto Priority

This field controls which of the 2 ASI inputs has

priority for when the “input select” field is set to

auto.

Selected Input

This field shows the currently selected ASI input.

TS Packet Length

This field shows the TS packet length of the

currently selected ASI input.

Input 1 and 2 ASI Invert

This field controls the inversion of inputs 1 and 2.

The options are:

•Auto - When selected, the corresponding ASI

input is automatically inverted when inversion

is detected on the ASI signal.

•Off - When selected, the corresponding ASI

input is passed directly through without

inversion.

•On - When selected, the corresponding ASI

input is manually inverted.

Input 1 and 2 Change Name

These fields allow the user to assign a name to

each ASI input.

To change a name type the new name in the text

box and is assigned by selecting (return)

Selecting (Preset) returns to the default

names.

Input 1 and 2 Status

This field displays the input status of each input

with the following messages:

OK input is present and has proper TS Packet

Sync.

?? input is present no TS Packet Sync.

** No input present

IQMDMO SECTION 40b

IQMDMOOPS 150403 Version 1 Issue 2 40b.11

RATES MENU

This window shows the bitrates for the streams

associated with the currently selected input and

program and is measured in accordance with the

DVB specification TR101290, profile MGB2.

TS rate

This shows the total bitrate for the Transport

Stream (TS) multiplex of the currently selected ASI

input.

Video PES

This shows the bitrate for the video PES stream

being decoded for the currently selected program.

Audio/data 1,2,3 and 4

This shows the bitrate for the selected audio

stream being decoded or AC-3 stream being

passed through to the corresponding AES/EBU

output.

Enable update

This controls whether the rates and ‘information’

carousel etc are regularly updated.

IQMDMO SECTION 40b

IQMDMOOPS 150403 Version 1 Issue 2 40b.12

LOGGING MENU

Logging

This menu group controls the generation of logging

messages to be sent to a RollCall logserver

somewhere on the network (see RollCall user

manual).

The menu consists of a list of all the possible

logging events that can trigger a RollCall log

message. Each can be individually enabled or

disabled by checking or clearing the associated

check box.

The following categories are listed:

All errors

This control enables / disables all the logging

categories.

Input 1 (or 2) loss

Logs the loss or acquisition at the inputs.

Input used

Logs changes of input being used

Video std

This controls logging of the video standard in use:

625/525

Ref input

Logs the reference input when in use and records:

OK / LOST / MISMATCH.

Ref std

Logs the reference standard when in use and

records: 625 / 525 / UNKNOWN.

Error status

This group shows all the errors that can be

recorded, together with their current status. A

checkbox associated with each error, enables or

disables the recording of that error type.

There are four error states:

•Present -error present within last second,

•Within minute -error occurred within last minute,

•Within hour -error occurred within last hour,

•OK -no recent errors

The current error status is also shown on the three

error LEDs at the module edge.

All errors

This status is the logical OR of all the other

categories, whilst this checkbox enables / disables

all categories.

Input

Error occurs when the input signal is not available.

MPEG lock

Error occurs when MPEG lock is lost.

Video ref lock

Indicates loss of video reference lock.

Video ref mismatch

Indicates video reference type is different to input

signal.

Clear errors

Clears error conditions and error LEDs.

IQMDMO SECTION 40b

IQMDMOOPS 150403 Version 1 Issue 2 40b.13

LOCK

This allows the locking source to be selected

Lock Mode

Either Video ref or MPEG ref may be selected.

This field selects to which reference to lock the

output video and audio clocks.

•MPEG ref

This causes the output video and audio to be

locked to the MPEG timestamps (PCR/PTS).

•Video ref

This causes the output video and audio to be

genlocked to the analogue input reference (Black

and burst).

Genlock H-phase

This enables the line timing between the output

signal and the reference signal to be adjusted.

The range of control is ±37000 In steps of 37 ns.

Genlock V-phase

This enables the field timing between the output

signal and the reference signal to be adjusted.

The range of control is ±350 lines in steps of 1 line.

MPEG Lock Status

This field displays the status of the MPEG

reference lock:

OK PCR is locked OK.

No lock Error locking to PCR

Video Ref Status

This field displays the status of the video

reference:

OK Input reference OK

625 -mismatch mismatched ref input is 625 line

525 -mismatch mismatched ref input is 525 line

No ref No reference signal detected

Video Out Status

This field displays the status of the video output.

OK Video locked OK

OK (unlocked) Video OK but not locked,

mismatch between video & ref

standard or no reference.

*** Invalid output

IQMDMO SECTION 40b

IQMDMOOPS 150403 Version 1 Issue 2 40b.14

VIDEO

This function allows various settings to be applied

to the video signal.

Chroma filtering

The type of filtering used for upsampling the

chrominance from 4:2:0 to 4:2:2 (for MP@ML

streams) may be selected from the following;

•Field based -The chrominance upsampling is

carried out on a field basis.

•Frame based -The chrominance upsampling

is carried out on a frame basis.

•Auto -The type of chrominance upsampling is

automatically selected from

‘chroma_420_type’ from the picture coding

extension, as recommended by ‘ETR 154’.

Test mode

This function allows the line standard and the type

of test pattern to be selected.

•Force freeze -When this function is selected

the output picture will become frozen.

•Force 625 pattern -The output video test

pattern will be the 625 line

•Force 525 pattern -The output video test

pattern will be the 525 line

•Auto freeze -When this function is enabled the

output picture will become frozen if the input

signal is lost.

•Auto pattern -When this function is enabled

the output picture will become the selected test

pattern if the input signal is lost.

Pattern type

The type of pattern may be either

•Black

•EBU Color Bars

Clipping limits

•Luma Clip Hi/Lo -The luminance high and low

clipping limits can be set here.

•Chroma Clip Hi/Lo -The chrominance high

and low clipping limits can be set here.

•Rec.601 nominal ranges -Pressing this button

will ‘preset’ the clipping limits to their Rec.601

nominal range values.

Teletext Insertion

The unit is able to insert Teletext into the VBI of the

output SDI video when Teletext data is available in

the selected input stream in accordance with the

DVB standard EN 300 472.

The embedding of the Teletext data into the output

VBI is in accordance with ETS 300 706.

✖Enable - When selected the Teletext data will

be inserted into the output VBI when available.

IQMDMO SECTION 40b

IQMDMOOPS 150403 Version 1 Issue 2 40b.15

AES OUTPUT

These menu items independently control the type of

streams to be decoded or output to each of the 4

available AES/EBU serial digital audio outputs.

Available streams

This window displays, within the context of the “Audio

mode” selection, the available streams that can be

decoded for the currently selected audio mode. Where

manual stream selection is selected, all possible private

streams are listed to allow selection of audio streams

that may not have been properly flagged as audio.

PID

This field displays the currently selected audio stream

PID being decoded or streamed to the corresponding

AES/EBU serial output.

Language

This field displays the language, where indicated in the

stream, of the currently selected audio stream for the

corresponding AES/EBU serial output.

Bit rate

This field displays the bitrate of the currently selected

audio stream for the corresponding AES/EBU serial

output, as indicated by the stream.

Sample rate

This field displays the audio sample rate of the currently

selected audio stream for the corresponding AES/EBU

serial output, as indicated by the stream.

Delay

This function allows the output delay to be adjusted

so that video and audio signals may be

synchronized.

The delay may be adjusted over a maximum range

of ±1000 ms* in steps of 1 ms. (*Note that the

overall adjustment range will depend on the input

stream)

A text indicator shows the ‘OK’ / ‘Late’ status.

Preferred language

This field selects the language for the stream to be

selected in the auto selection modes.

Auto action

This field controls what happens on the

corresponding output when there is no signal

available for that output. The options are:

•Auto tone -If no signal is available then the

output produces a valid tone signal (250Hz

tone on the left channel and 500Hz tone on the

right).

•Auto mute -If no signal is available then the

output produces a valid digital mute signal.

•Auto disable -If no signal is available then the

output is disabled.

Output test mode

•Tone -Drive the output with a 250Hz tone on

the left channel and 500Hz tone on the right.

•Mute -Drive the output with a valid digital mute

signal.

•Disable -Disable the output.

Audio mode

This field controls the type of audio stream to be

decoded or streamed to the corresponding output. The

options are:

•Layer I/II auto: This mode causes the audio

decoder to automatically select an audio stream

corresponding to the language set in the “Preferred

language” field. If no such stream is available the

output behaves according to the “Auto action” field.

•Layer I/II manual: This mode causes the audio

decoder to select an audio stream that is manually

selected from the “Available streams” window. If

no stream is selected then the output behaves

according to the “Auto action” field.

•AC-3 auto language: This mode causes the

automatic selection of an AC-3 audio stream

corresponding to the language set in the

“Preferred language” field to be streamed out

to the corresponding AES output. If no such

stream is available then the output behaves

according to the “Auto action” field.

•AC-3 manual: This mode causes the audio

decoder to select an AC-3 audio stream that is

manually selected from the “Available streams”

window. If no stream is selected then the

output behaves according to the “Auto action”

field.

IQMDMO SECTION 40b

IQMDMOOPS 150403 Version 1 Issue 2 40b.16

Audio Embedding

There are 8 slots (output pairs) available within the

video for embedding audio.

Each slot is configurable for embedding any one of

the 4 AES outputs by checking the appropriate

Output Pair/AES 1, 2, 3, 4 output box or no

embedding by checking the None box.

Enable Audio Embedding

When this box is selected the audio embedding

selections will be enabled; when unchecked audio

embedding will be disabled.

NOTE: Audio embedding is only operative when

using the MPEG lock mode (because audio must

be locked to the video).

IQMDMO SECTION 40b

IQMDMOOPS 150403 Version 1 Issue 2 40b.17

MEMORY MENU

This allows the complete configuration of the

module to be stored or retrieved in one of 4 locally

held configuration memories.

It has the following fields:

Memory Recall

This field contains one button for each of the 4

locally stored configuration memories. Pressing

one of these buttons causes all of the control

parameters of the module to be recalled from the

selected memory.

N.B. Loading from one of the configuration

memories will cause all of the current parameter

settings to be lost. No warning is given when this

happens. If you wish to return to the current state,

the settings must first be saved in another of the

configuration memories (Memory Save).

Memory Save

This field contains one button for each of the 4

locally stored configuration memories. Pressing

one of these buttons causes the current state of all

the control parameters of the module to be saved

to the selected configuration memory.

Memory Default

This field contains one button for each of the 4

locally stored configuration memories. Pressing

one of these buttons causes the factory default

settings to be restored to the selected configuration

memory.

N.B. Restoring default settings to a memory will

overwrite any previous settings. No warning is

given when this happens.

Memory Names

This allows the naming of the four memory

locations.

To change a name, type the new name in the text

area and select ➨(return)

Selecting P(Preset) returns to the default names.

IQMDMO SECTION 40b

IQMDMOOPS 150403 Version 1 Issue 2 40b.18

SETUP

Preset Unit

This item sets all adjustment functions that include

a preset facility (except names), to their preset

values.

Note that this is a momentary action.

Software version

This item shows the version of the software

installed in the module.

Serial Number

This item shows the serial number of the module.

Hardware Revision

This item shows the hardware revision of the

module.

Enable update

This controls whether the rates and ‘information’

carousel etc are regularly updated.

IQMDMO SECTION 40b

IQMDMOOPS 150403 Version 1 Issue 2 40b.19

IQMDMO SECTION 40b

IQMDMOOPS 150403 Version 1 Issue 2 40b.20

OPERATION FROM AN ACTIVE CONTROL PANEL

The card may be operated with an active control panel via the RollCall network.

The menus available for this card are shown on the previous page and will appear in the Control display

window.

Operational details for the remote control panel will be found in SECTION 1 of the Modular System Operator's

Manual.

MENU DETAILS

(see IQMDMO Menu System on previous page)

MAIN MENU

The main or top level menu allows various sub-

menus to be selected by pressing the button

adjacent to the required text line.

IQMDMO MENU

Program...

Inputs...

Setup...

Lockmode...

Outputs...

Note that where a menu item is followed by three

dots (...) this indicates that a further sub-menu may

be selected.

Whenever a menu item is selected the parameters

of that selection will be displayed in the control

window of the front panel. Where the selection is

purely a mode selection and does not enable a

sub-menu, the text will become reversed (white-on-

black) indicating that the mode is active. If the

mode is not available for selection the text will

remain normal.

◀

◀◀

◀Program…

This shows the services present in the transport

stream and the components that comprise each

one.

Program/PMTs

Programs...

Program info

Bit rates...

TS ID

PCR PID

Program view...

Program view order...

PID format (Radix)...

Lock Program

ES PIDs...

◀

◀◀

◀Programs…

This has the following fields:

Programs

This window allows selection of the program to

decode.

◀

◀◀

◀Program Info

This item will display the selected SI program

name.

Program Info

Program info

progrm_info

Note that if the program is encrypted then the view

will toggle between the SI program name and the

text: ‘Encrypted’.

◀

◀◀

◀Lock Program

This controls the service selection behaviour.

When selected, only the selected service will be

decoded (when present) regardless of changes to

the transport stream.

When unselected, upon loss of the selected

service a new service will automatically be selected

for decode.

◀

◀◀

◀ES PIDS…

ES PIDS

es_pids

This window shows the PID and type of all the

Elementary Streams that make up the program

selected.

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