Transcript
Page 1: HD Voice, telecom operators

It’s all Gone HD!It s all Gone HD!  Overcoming the hurdles 

to supplying HD Voice andto supplying HD Voice and resolving the Codec war 

July 14 2009

Page 2: HD Voice, telecom operators

SpeakersSpeakers

Elliot GoldElliot Gold– President TeleSpan Publishing Corp

Dovid Coplon– Senior Director, Product Management, g

Page 3: HD Voice, telecom operators

Why HD Voice is about to be “it”

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I’ve learned something after 30+ years in the i d tindustry

• Early to market stake in the ground works• Early to market, stake in the ground works

– If you recognize the right trends

– If you team with the right people

f h b h l ll f– If you have common sense about how people really meet, face‐to‐face, or virtually

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Allow me to tell you a story

• In the late 1970s, AT&T was testing PMS (not the disorder, the Picturephone Meeting Service)Picturephone Meeting Service)

• They wanted to deliver the best video, customers could afford

• So they ran focus groups

Page 6: HD Voice, telecom operators

AT&T told the audience

• “Ok, you saw our first video quality”

• “Allow us to take a moment, and change the quality, and run the video by you again to see what you think.”

• AT&T then changed “the quality”, and ran it by the audience

• Overwhelmingly, the audience liked the second video qualityOverwhelmingly, the audience liked the second video quality

• What did AT&T change?

Page 7: HD Voice, telecom operators

The Audio Fidelity!y

Page 8: HD Voice, telecom operators

Then AT&T introduced Picturephone MeetingThen AT&T introduced Picturephone Meeting Service

And ended up with PMS, because they failed to increase the audio fidelity

The system is gone now

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Spin the calendar forward 30 yearsk id % f lLook at HD Video as a % of Group Sales

70%80%90%100%

40%50%60%70%

Legacy 

0%10%20%30%

g yTechnologyHD Video

0%

Q4 07 Q1 08 Q2 08 Q3 08 Q4 08 Q1 09

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But…

• Video equipment is – Only 20.7% of revenues

• Video usage isg– Only 2.6% of revenues

• Audio usage on the other hand isAudio usage on the other hand is– 51% of revenues

• And over 25 billion minutes of audio conference call use• And, over 25 billion minutes of audio conference call use

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Dovid CoplonSenior Director, Product Management

Page 12: HD Voice, telecom operators

“It is not the strongest of the species that survives nor theIt is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is the most adaptable to change” – Charles Darwin

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What is HD Voice?

Quality

CD ‐Audio

b d h

Std Wideband Speech(e g G 722 2)

Audio

GIPS Wideband Speech

GIPS Narrowband Speech (e.g. G.722.2)

Std Narrowband Speech Implementation (PSTN) Frequency

4 kHz 6.4‐7.0 kHz3.4 kHz 22.1 kHz8 kHz

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Standard Technology has not Progressed by Leaps and Bounds over the yearsand Bounds over the years…

… and Traditional Technologies are not designed to run over IP networks

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HD Brings Everything into Focus – Maximizing the User ExperienceUser Experience

HD Voice is Essential to Overall Experience especially when combined with videoespecially when combined with video

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Here Comes HD Voice

Page 17: HD Voice, telecom operators

May 2009 Industry Professional Poll Question

What has been your experience with HD‐Voice?

11%

13% Never Tried it47 %

47%

30%

11%

Have tried it once or twice

Use it all the time or whenever I can

Not sure if I've tried it

30%

11%

13% Not sure if I ve tried it

Potential of HD Voice Light Reading Webinar- May, 2009

13%

• 90 % of the audience had very limited HD Voice experience

g g y,

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May 2009 Poll Questions

Where do you think HD‐Voice will make the biggest impact?

16%

45%

impact?

Call Centers16 %45%

33%

6%Conference calls

Video conferencing

International-placed phone calls

45%

33%

6% International-placed phone calls

Potential of HD Voice Light Reading Webinar- May, 2009

6%

• Highest expected impact on conference calls and video conferencing

g g y,

Page 19: HD Voice, telecom operators

How to Get the Most Out of HD Voice

1. HD capable microphone2 High quality HD Voice codec2. High quality HD Voice codec

– Suitable for usage scenario3. HD Voice Quality Enhancement

– Echo cancellation, noise suppression, gain control…4. End‐to‐end network HD Voice support

– Preferably no transcoding– Absolutely no narrowband

5. Network clean‐up– Jitter buffer and packet loss concealmentp

6. HD capable speaker

Page 20: HD Voice, telecom operators

So Many Codec Options

29RTAudio

iSAC

G.729.1

G.719iPCM‐WB

G 722 1 (Siren)BV 32

Speex

AAC‐LDG.722.2 (AMR‐WB)

G.722.1 (Siren)BV 32

G.718SILK

AAC LD G.722

SVOPCSVOPC G.711.1EVRC‐WB

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HD Voice Codec Selection

• Not one codec fits all scenarios

• Packet loss robustness important for VoIP• Packet loss robustness important for VoIP

• Variable bit rate attractive for IP networks− Automatic adaption to available rate attractivep

• Packet overhead significant (5 – 32 kb/s)− Makes low bit rate codecs less attractive

• Low delay very important

• Standard versus proprietary− Standards usually come at a higher cost

• Complexity an important issue in Mobile VoIP

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Codecs compared

MUSHRA test results for different codecs

708090

100

3040506070

0102030

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VoIP Design Considerations

QualityCost

Speech Quality

Time to MarketEase of Use

Cost

SignalingCost

Flexibility

Ease of Use

Network Impairment

Signaling

Features

Infrastructure

ImpairmentPower Consumption

Device Considerations

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Advancements in Speech Processing Design

More Than Just a Codec

Hardware Issues (Processor, OS, Acoustics etc )

Speech Codec Codec

VoIP Design

Coping with Network  Power Consumption

Acoustics, etc.)Network Hardware

VoIP DesignChallengesDegredation

Echo CancellationEnvironment –

EchoPower

Additional Voice Processing Components

Background Noise, Room Acoustics, etc.Voice Environment

Page 25: HD Voice, telecom operators

Why Bandwidth Estimation is Important

• When properly utilized, bandwidth estimation can ensure consistent, high quality experience

− Fixed bit rate solutions estimate bandwidth once at the beginning of the call (or not at all) – no flexibility

− Variable bit rate HD codecs adapt to the network

2) Then Determines Bit Rate1) Fixed Codec Detects Bandwidth 3) Begins Sending Media

32 kbps?32 kbps it is!

…but bottleneck appearance during the call can cause delays if bit rate is not adjusted

Page 26: HD Voice, telecom operators

HD is Everywhere and the Benefits are ClearExcept for our Phones… Except for our Phones

• Better comprehension

• Identify who’s talking

• Higher productivity 

• Lower fatigue

• Overcome accents

• Speakerphone solution!p p


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