HD Voice: The Hurdles and how to overcome the codec war

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Information about HD Voice: The Hurdles and how to overcome the codec war

Published on July 15, 2009

Author: johnjsf

Source: slideshare.net


Global IP Solutions (GIPS) held a webinar on July 14, 2009.
"It’s all Gone HD! Overcoming the hurdles to supplying HD Voice and resolving the Codec war"

It s all Gone HD!   It’s all Gone HD! Overcoming the hurdles  to supplying HD Voice and  to supplying HD Voice and resolving the Codec war  July 14 2009

Speakers Elliot Gold Elliot Gold – President TeleSpan Publishing Corp Dovid Coplon – Senior Director, Product Management , g

Why HD Voice is about to be “it”

I’ve learned something after 30+ years in the  industry i d t • 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 – If you have common sense about how people really meet, face‐to‐ f h b h l ll f face, or virtually

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

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 quality Overwhelmingly, the audience liked the second video quality • What did AT&T change?

The Audio Fidelity! y

Then AT&T introduced Picturephone Meeting  Then AT&T introduced Picturephone Meeting Service And ended up with PMS, because they  failed to increase the audio fidelity The system is gone now

Spin the calendar forward 30 years Look at HD Video as a % of Group Sales k id % f l 100% 90% 80% 70% 60% 50% 40% Legacy  g y 30% Technology 20% HD Video 10% 0% Q4 07 Q1 08 Q2 08 Q3 08 Q4 08 Q1 09

But… • Video equipment is  – Only 20.7% of revenues • Video usage is g – Only 2.6% of revenues • Audio usage on the other hand is Audio 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

Dovid Coplon Senior Director, Product Management

“It is not the strongest of the species that survives nor the It 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

What is HD Voice? Quality CD ‐ Audio GIPS Wideband Speech Std Wideband Speech (e.g. G.722.2) (e g G 722 2) GIPS Narrowband Speech b d h Std Narrowband Speech  Implementation (PSTN) Frequency 3.4 kHz 4 kHz 6.4‐7.0 kHz 8 kHz 22.1 kHz

Standard Technology has not Progressed by Leaps  and Bounds over the years… and Bounds over the years … and Traditional Technologies are not  designed to run over IP networks

HD Brings Everything into Focus – Maximizing the  User Experience User Experience HD Voice is Essential to Overall Experience  especially when combined with video especially when combined with video

Here Comes HD Voice

May 2009 Industry Professional Poll Question What has been your experience with HD‐Voice? 13% 47 % Never Tried it 11% 47% 30% Have tried it once or twice 11% Use it all the time or whenever I can 30% 13% Not sure if I've tried it I ve g g y, Potential of HD Voice Light Reading Webinar- May, 2009 • 90 % of the audience had very limited HD Voice experience

May 2009 Poll Questions Where do you think HD‐Voice will make the biggest  impact? 16% 45% 16 % Call Centers 6% 45% Conference calls 33% Video conferencing 33% 6% International-placed phone calls g g y, Potential of HD Voice Light Reading Webinar- May, 2009 • Highest expected impact on conference calls and video  conferencing

How to Get the Most Out of HD Voice 1. HD capable microphone 2. High quality HD Voice codec 2 High quality HD Voice codec – Suitable for usage scenario 3. 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 concealment p 6. HD capable speaker

So Many Codec Options iSAC RTAudio G.729.1 29 iPCM‐WB G.719 BV 32 BV 32 G.722.1 (Siren) G 722 1 (Siren) Speex G.722.2 (AMR‐WB) AAC LD AAC‐LD G.722 SILK G.718 SVOPC G.711.1 EVRC‐WB

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 attractive p • 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

Codecs compared MUSHRA test results for different codecs 100 90 80 70 60 50 40 30 20 10 0

VoIP Design Considerations Speech Quality Time to Market Cost Quality Ease of Use Ease of Use Cost Signaling Flexibility Infrastructure Network  Features Impairment Power  Device  Consumption Considerations

Advancements in Speech Processing Design More Than Just a Codec Hardware Issues  Speech Codec Codec (Processor, OS,  Acoustics, etc.) Acoustics etc ) Network Hardware Coping with  Network  VoIP Design VoIP Design Power Consumption Degredation Challenges Power Echo Echo Cancellation Environment – Additional Voice  Background Noise,  Processing Components Voice Environment Room Acoustics, etc.

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 1) Fixed Codec Detects Bandwidth 2) Then Determines Bit Rate 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

HD is Everywhere and the Benefits are Clear … Except for our Phones Except for our Phones • Better comprehension • Identify who’s talking • Higher productivity  • Lower fatigue • Overcome accents • p p Speakerphone solution!

Poll Question Poll Question •When is your organization planning to utilize or deploy HD y g g y (wideband) voice? • A) 6 - 12 months • B) 1 - 2 years • C) 2 - 3 years ) y • D) 3 - 5 years • E) Don t Know Don’t

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