Published on July 15, 2009
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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