Problem solved, Webinar 2 of 3 August 27, 2020 Your questions - - PowerPoint PPT Presentation

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Problem solved, Webinar 2 of 3 August 27, 2020 Your questions - - PowerPoint PPT Presentation

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Problem solved, Webinar 2 of 3 August 27, 2020 Your questions please? (if you dont see the control panel, click on the orange arrow icon to expand it) Please enter your questions in the text box of the webinar control panel (remember to

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SLIDE 1

August 27, 2020

Problem solved, Webinar 2 of 3

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SLIDE 2

Your questions please?

(if you don’t see the control panel, click on the orange arrow icon to expand it) Please enter your questions in the text box of the webinar control panel (remember to press send)

Remember: The completion of a Nautel webinar qualifies for ½ SBE re-certification credit, identified under Category I of the Re-certification Schedule for SBE Certifications.

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SLIDE 3

Host Jeff Welton Sales Manager, Central USA Panelist Geoff Steadman Omnia Product Manager Panelist Philipp Schmid Nautel Chief Technology Officer Panelist John Whyte Nautel Head of Marketing

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SLIDE 4

Today’s topics

  • Nautel and Telos Alliance Collaboration
  • Review of Air Chain Challenges
  • Detailed Blend Alignment problems
  • Software Technologies
  • Telos Alliance Enterprise Omnia 9s
  • Software HD Radio Server
  • Made for Radio: E2X and MPX
  • Demonstration
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SLIDE 5

So why this current collaboration and why now?

  • Nautel and Telos Alliance: Passion & innovation
  • Change:
  • Industry & technology
  • Challenges:
  • Listeners, locations, competition, complexity
  • Fresh approaches
  • Apply new technologies, reduce complexity, drive out costs

Digital Signal Processing AoIP

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SLIDE 6

Dig igit ital Radio matters more now

  • 65 Million HD Radio cars
  • Opportunities:
  • Podcasts/Streams On-Air
  • Ethnic broadcasting
  • Leased channels
  • Sports coverage
  • Over 2300 HD Radio stations
  • but 13,000 Analog only
  • Challenging for many:
  • Too complex? Too expensive? ROI?

Cheaper, Easier, More Flexible Air-Chain Solutions

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SLIDE 7

HD Radio Diversity Delay Challenges

“Audible blending artifacts are the top complaint from auto manufacturers and consumers regarding the HD Radio experience”

Source: Alan Jurison, “The Need for Automatic Alignment of HD Radio Diversity Delay”, RadioWorld

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SLIDE 8

GV

content creation content contribution content creation content contribution content creation content contribution FM processor exgine HD modulator FM STL receiver RDS encoder FM STL transmitter playout automation emergency alert content creation content contribution synchronizer HD1 exporter HD2-4 importer FM exciter ratings watermark FM delay HD STL transmitter HD STL receiver HD1 processor

GPS GPS

E2X

PSD

HD2-4 processor

HD Radio adds complexity and cost

Initially Importer and Exporter at studio to minimize HD STL bandwidth Often a 2nd STL and even a 2nd transmitter required

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SLIDE 9

GV

content creation content contribution content creation content contribution content creation content contribution FM processor exgine HD modulator FM STL receiver RDS encoder FM STL transmitter playout automation emergency alert content creation content contribution synchronizer HD1 exporter HD2-4 importer FM exciter ratings watermark FM delay HD STL transmitter HD STL receiver HD1 processor

GPS GPS

HD

PSD

HD2-4 processor

FM and HD audio must be within 3 audio samples

FM

But how can FM/HD time alignment be maintained?

HD Radio adds complexity and cost

Initially Importer and Exporter at studio to minimize HD STL bandwidth Often a 2nd STL and even a 2nd transmitter required

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SLIDE 10

Why does IB IBOC delay HD1 audio?

  • Interleaving spreads burst type errors in time

in order: bytes_are_####t_in_time

  • ut-of-order:

b_s_itrlne####yapimeei_ re-ordered: b#te#_are#split_in_#ime

Example taken from “The IBOC Handbook”

  • Interleaver adds 4.5s of HD1 audio delay
  • 1.48s interleaver in exciter,
  • 1.48s for transmission,
  • 1.48s de-interleaver in receiver
  • Many other delays in the IBOC air chain … 8-10s typical, more on HD2-4
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SLIDE 11

HD1 falls back to FM on severe RF Im Impairment

FM delay is on the transmit side

  • delay is set in processor, exporter, or exciter

IBOC delay is split between transmission and receiver Receiver blends to FM on HD loss FM audio is good by the time HD1 audio plays – seamless blend

studio feed listener audio RF over the air FM/HD split FM/HD join FM delay HD delay blend

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SLIDE 12

Differences in HD1 and FM Audio Levels

FM and HD1 audio levels should be matched to with 0.5 dB

  • 1. Set up FM for 100% modulation
  • 2. Match HD1 levels in processor

They typically stays static; set and forget.

HD delay blend FM delay studio feed listener audio RF over the air FM/HD split FM/HD join

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SLIDE 13

Time Alignment Error

Main blend impairment is diversity delay misalignment Large errors (50ms+) cause audio skip or repeats Small misalignments can cause audible audio artefacts How closely do we need to be aligned?

HD delay blend FM delay studio feed listener audio RF over the air FM/HD split FM/HD join

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SLIDE 14

Best blend within 68μs

  • r 3 audio samples

(NRSC-5 specification)

Audio Fil iltering Effects during Ble lending

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SLIDE 15

Best blend within 68μs

  • r 3 audio samples

(NRSC-5 specification) 12 to 50 samples (272μs to 1.1ms) notches significant audio content (comb filter effect)

Audio Fil iltering Effects during Ble lending

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SLIDE 16

Best blend within 68μs

  • r 3 audio samples

(NRSC-5 specification) 12 to 50 samples (272μs to 1.1ms) notches significant audio content (comb filter effect) Better blend with selective notches 300 samples / 6.8 ms

Audio Fil iltering Effects during Ble lending

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SLIDE 17

Typical Div iversity Dela lay Dri rift Measurements*

Without 10 MHz GPS Synchronization 200 samples / 4.5 ms swing With 10 MHz Exciter Synchronization 15 samples / 340 μs swing

±3 samples

*NRSC-G203 NRSC IBOC Time and Level Alignment Guideline

±3 samples

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SLIDE 18

GV

content creation content contribution content creation content contribution content creation content contribution FM processor exgine HD modulator FM STL receiver RDS encoder FM STL transmitter playout automation emergency alert content creation content contribution synchronizer HD1 exporter HD2-4 importer FM exciter ratings watermark FM delay HD STL transmitter HD STL receiver HD1 processor

GPS GPS PSD

HD2-4 processor

Approaches for Optimizing FM/HD Ble lend Experience

All HD equipment AND audio processor is suggested to be at the transmitter site*

*NRSC-G203 NRSC IBOC Time and Level Alignment Guideline

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SLIDE 19

GV

content creation content contribution content creation content contribution content creation content contribution FM+HD processor exgine HD modulator multi channel STL RDS encoder multi channel STL playout automation emergency alert content creation content contribution synchronizer HD1 exporter HD2-4 importer FM exciter ratings watermark FM delay HD2-4 processor

GPS

Approaches for Optimizing FM/HD Ble lend Experience

All HD equipment AND audio processor is suggested to be at the transmitter site* STL must now carry all HD1-HD4 audio streams, high bandwidth Single FM+HD audio processor for best alignment and blend

*NRSC-G203 NRSC IBOC Time and Level Alignment Guideline

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SLIDE 20

GV

content creation content contribution content creation content contribution content creation content contribution FM+HD processor exgine HD modulator multi channel STL RDS encoder multi channel STL playout automation emergency alert content creation content contribution synchronizer HD1 exporter HD2-4 importer FM exciter ratings watermark FM delay HD2-4 processor

GPS

div delay corrector

FM RX

Active Diversity Delay Correction using Receiver Is active delay correction the ultimate solution?

Reactive Off-Air Dela lay Correction

Can hide underlying delay drift Corrector must be within station coverage

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SLIDE 21

Made for r Radio: : Exporter 2 Exgine (E (E2X) li link

  • Connects exporter to exgine modulator over Ethernet
  • Carries HD Radio content ONLY, no FM content
  • Designed for IP STL transmission, low bandwidth
  • Accepted “de-facto” industry standard
  • Not defined in NRSC specification … but everyone uses it
  • Interoperability with all major vendors
  • Backwards compatibility
  • Nautel Reliable HD Transport improves E2X transmission reliability

Exgine Modulator UDP or TCP

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SLIDE 22

GV

Made for r Radio: : MPX over IP IP

FM processor FM STL receiver RDS encoder FM STL transmitter playout automation emergency alert content creation content contribution FM exciter ratings watermark

Analog MPX Analog MPX

Composite signal carries all FM signal components Simplifies signal transfer Provides flexibility to locate processing at the studio

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SLIDE 23

GV

content creation content creation content contribution content creation content contribution FM+HD1 processor IP STL IP STL playout automation emergency alert content creation content contribution

combined imp/exporter

FM+HD exciter ratings watermark

Can we Centralize the Entire Radio Air ir-Chain?

Single Ethernet input simplifies TX site Can we move the FM and HD Air-Chains together? Can we utilize “Made for Radio” standards & technologies?

Centralized Studio

backup FM+HD

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SLIDE 24

A New Approach: A Soft ftware HD Radio Serv rver

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SLIDE 25

Omnia Enterprise 9s Soft ftware Audio Processing

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Synchronous System fr from SPLIT IT to JOIN

main audio feed

TCP/IP exgine FM modulator

buffer

+

44.1 kHz HD1 L/R E2X MPX 176.4 kHz MPX

E2X MPX E2X MPX

time keeper

Software HD Radio Server Nautel Exciter SPLIT JOIN

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SLIDE 27

Omnia Enterprise 9s

Omnia Enterprise 9s FM / HD Processor

  • Built from the Omnia 9
  • Highest quality audio
  • Common feature “DNA”
  • Undo
  • Advanced Signal analytics
  • Flexible Monitoring
  • Embedded pilot & RDS
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SLIDE 28

Omnia Enterprise 9s: : Sonic Vis isib ibility

Omnia Enterprise 9s FM / HD Processor

  • NF Remote application
  • Powerful Real-Time metering
  • up to 8 simultaneous displays
  • View and listen to any point in your

processing chain

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SLIDE 29

Omnia Enterprise 9s: : H HD1 & FM Cohesion

Omnia Enterprise 9s FM / HD Processor

  • Shared processing structure

up to final output stages

  • Greatest possible HD-FM

sonic coupling

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SLIDE 30

Omnia Enterprise 9s: : U Uncommon Power

Omnia Enterprise 9s FM / HD Processor

  • Preset cloning and deployment
  • Develop and share presets between

FM, HD1, HD2, HD3, Streams & Codecs.

  • Export Settings to other instances
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SLIDE 31

Omnia Enterprise 9s I/ I/O

Omnia Enterprise 9s FM / HD Processor

  • Livewire+ AES67
  • Stream Inputs
  • L/R
  • Livewire +AES67
  • Composite
  • Linear MPX over IP
  • µMPX
  • Streams
  • AAC
  • HE-AAC
  • MP2
  • MP3
  • FLAC
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SLIDE 32

Benefits of f Omnia Enterprise Processing

  • Ability to run multiple instances on a single server
  • Ability to host the server on premises or in the cloud
  • Ability to integrate processing within other workflows
  • Scalability
  • Leverage of expanding IP Infrastructures
  • Enabled by standards based IP audio
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SLIDE 33

Demonstration

Livewire Livewire Livewire icecast Proc Core

VS 300 n n VSHD VS 300 n

VS300 + VSHD

firewall Sofia RX Justin 808 Proc Core Proc Core Proc Core HD1 HD2 HD3 HD4 FM MPX Station Logo Gen4 Importer Software HD Radio Server RDS Saint Cloud, Minnesota Alex Hartman’s Garage Nautel HQ Public Internet TCP/IP: E2X + Linear MPX Nautel VS300

Long distance IP delivery over public Internet Stable delay without GPS synchronization 1470 miles (39 ms ping)

80 W

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SLIDE 34

Demonstration: What you’ll see

Omnia Enterprise 9s Remote UI GEN4 Importer Web UI Nautel Web UI Inovonics Sofia Streaming Receiver Inovonics Justin 808

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SLIDE 35

Demonstration: What you’ll see

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SLIDE 36

FM/HD Div iversity Dela lay Problem Solved

FM and HD1 time lock is achieved by synchronously

1. splitting the audio in the audio processor 2. transmitting E2X and MPX in a single IP stream 3. joining modulated FM and IBOC in the exciter

The HD Radio air chain is now location agnostic

  • transmitter site or studio
  • centralized/regional studio

HD Radio air chain is entirely software based

  • no audio cards or specific hardware
  • no reactive diversity delay monitor required
  • GPS is not required to maintain diversity delay

Legacy + Cross Compatibility using

1. E2X in HD only legacy mode (back to 2005 vintage) 2. μMPX and MPX Node 3. reactive diversity delay correction receivers

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GV

content creation content creation content contribution content creation content contribution FM+HD1 processor IP STL IP STL playout automation emergency alert content creation content contribution

combined imp/exporter

FM+HD exciter

ratings watermark

Can we Centralize the Entire HD Radio Air ir-Chain? YES

In today’s demonstration:

  • Ability to centralize the HD Radio air chain
  • Flexible software only HD Radio air chain
  • Time locked FM and HD1 to eliminate alignment drift

Centralized Studio

backup FM+HD

Tune in to the next webinar to examine options for a new way forward …

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