viewer-aware optimization - mile high€¦ · mhv – abdul rehman, ph.d. december 2020. 2. the...

CONFIDENTIAL

Viewer-aware OptimizationMHV – Abdul Rehman, Ph.D.December 2020

The ingredients to Viewer-Aware Optimization

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What are the success criteria for a “True” Viewer Experience Metric?

Success criteria VMAF SSIM PSNR SSIMPLUS®

1 Consistent across content types ⅹ No ⅹ No ⅹ No ü Yes

2 Consistent across impairments ⅹ No ⅹ No ⅹ No ü Yes

3 Support for Viewer Modes ⅹ No ⅹ No ⅹ No ü Yes

4 Consistent across content attributes ◑ Partially ◑ Partially ◑ Partially ü Yes – SDR, HDR

5 Consistent across LIVE and VOD ◑ Only VOD ◑ Only VOD ü Yes ü Yes

6 Source quality (incl. no-reference) ⅹ No ⅹ No ⅹ No ü Yes

7 Playback Viewer Experience ⅹ No ⅹ No ⅹ No ü Yes

Step 1 – Content Acquisition and Encoding

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Encoding - a Trade-off between Cost and Viewer Experience

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CostUnhappy subscribers due to poor video quality

A perfect balance might still cause subscriber churn

Say Goodbye to the trade-offs

Start with the Viewer First

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Content-aware encoding = great deviations in video quality

SSIMPLUS Viewer Score20

Asset Count

40 60 80 100

This model has been confirmed with thousands of assets and with different content-aware approaches including the most popular Cloud ones

70 90

Targ

et Vie

wer

Expe

rienc

e

50

Spending resources that don’t improve the Viewer Experience


Asset Count

40 60 80 10070 9050

Wasting bandwidth and $$$ on this

content

Underperforming for other assets that can cause churn


Asset Count

40 60 80 10070 9050

Delivering poor Viewer

Experience/churn

Achieve consistent quality across the whole asset library is easy when you know the Viewer Experience for each asset


Asset Count

40 60 80 10070 9050

Give bandwidth to the assets that need it

Convert subpar quality assets to your target Viewer Experience using the excess bits


Asset Count

40 60 80 10070 9050

Achieve big savings by not wasting bits


Asset Count

40 60 80 10070 9050

Convert the extra bandwidth into extra

savings $$$$$$

What are the success criteria for a “True” Viewer Experience Metric?

Success criteria VMAF SSIM PSNR SSIMPLUS®

Consistent across content types ⅹ No ⅹ No ⅹ No ü Yes

Consistent across impairments ⅹ No ⅹ No ⅹ No ü Yes

Support for Viewer Modes ⅹ No ⅹ No ⅹ No ü Yes

Consistent across content attributes ◑ Partially ◑ Partially ◑ Partially ü Yes – SDR, HDR

Consistent across LIVE and VOD ◑ Only VOD ◑ Only VOD ü Yes ü Yes

Source quality (incl. no-reference) ⅹ No ⅹ No ⅹ No ü Yes

Playback Viewer Experience ⅹ No ⅹ No ⅹ No ü Yes

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VMAF = 95.88PSNR = 39.37MS-SSIM = 0.99SSIM = 0.99 SSIMPLUS Score = 19 (Poor Quality)

We know why the image is bad – SSIMPLUS Quality Map

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Good-bye trade-offs! Deliver “Just Right” Viewer Experiences for every asset

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SSIMPLUS Viewer Score Bitrate Mb/s becomes an output

Dial Quality up or down based on your business metrics

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SSIMPLUS® Viewer Experience Score Great (80)Very Good (75)

World Beater (90)Excellent (85)

Or beat all the rest with a World Class quality of 90 and still achieve savings

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SSIMPLUS Viewer Score

TitleEncoder A Encoder B

World BeaterSSIMPLUS 90

Caminandes_2_Gran_Dillama 2583 2192

Caminandes_3_Llamigos_Funny 3173 2790

Dogs_running 2752 2564

Glass_Half 1866 1680

Stores 17456 16630

The_Daily_Dweebs 1893 1893

Traffic 3044 2788

Average Bitrates (kbps) 4681 4774

Bitrate Savings (%) 19.29% 17.69%*Results for H.264/AVC

Services that put Video Quality as priority can dial to 85 and still achieve 50% savings

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ExcellentSSIMPLUS 85




Glass_Half 1245 1128

Stores 10369 9367


Traffic 1804 1553



For cost conscious services, Dial the Video Quality to 75 and achieve even greater savings while still delivering Good Quality

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Very goodSSIMPLUS 75




Glass_Half 914 754

Stores 5764 5405


Traffic 1248 1054



Step 2 – Content Delivery and Playback

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* There is no additional computational burden on the player

The future is here – deliver video quality on demand

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By Region/Market By Device By Viewer

Thank you!

Get in touch: [email protected]

viewer-aware optimization - mile high€¦ · mhv – abdul rehman, ph.d. december 2020. 2. the...

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