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4k – the technical details
4k – the technical details
Picture resolution and viewing distance
Picture resolution and viewing distance
If I want to see all this extra detail do I need to move my sofa
If I want to see all this extra detail do I need to move my sofa
8’
8’
8’
8’
8’
8’
But do I need to move my sofa for 4k
But do I need to move my sofa for 4k
8’
8’
Picture improvements
Picture improvements
Acquiring 4k content – features and episodic
Acquiring 4k content – features and episodic
Not all 4k is created equal
Not all 4k is created equal
Delivering 4k to the consumer
Delivering 4k to the consumer
Availability of 4k in the consumer market
Availability of 4k in the consumer market

Презентация на тему: «4k – the technical details». Автор: Stephens, Spencer. Файл: «4k – the technical details.pptx». Размер zip-архива: 1044 КБ.

4k – the technical details

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1 4k – the technical details

4k – the technical details

2 Picture resolution and viewing distance

Picture resolution and viewing distance

Ultra High Definition (UHD) is 3840x2160 pixels UHD and 4k are often used interchangeably 4k (digital cinema definition) is 4096x2160 pixels

3 If I want to see all this extra detail do I need to move my sofa

If I want to see all this extra detail do I need to move my sofa

No but you’re going to want a bigger screen.

4 8’

8’

5 8’

8’

Perfect place. You are 7x the screen height away. So you can see all the detail but you can’t see the dots.

6 8’

8’

50”

High Definition

Perfect place. You are about 3.5x the screen height away. So you can see all the detail but you can’t see the dots.

7 But do I need to move my sofa for 4k

But do I need to move my sofa for 4k

8’

8 8’

8’

That works. You are about 2x the screen height away. So you can see the detail but you can’t see the dots.

9 Picture improvements

Picture improvements

Picture specifications for HD (Rec. 709) is based on CRT TVs Opportunity to improve picture parameters Larger color space (Rec 2020, XYZ) Greater dynamic range More details in the highlights, darker shadows Brighter screens for better color display 12 bits vs. 8 bit for Blu-ray and broadcast TV Higher frame rates 48 fps or 60 fps for high frame rate movies 100 fps or 120 fps sports broadcast

10 Acquiring 4k content – features and episodic

Acquiring 4k content – features and episodic

Camera Type

Maximum Resolution

Comments

In use?

4k?

35mm Film

Scanned at 4k

Most features and all episodic that are shot on film

Yes

Yes

65mm Film

Scanned at 6k

“Lawrence of Arabia”

No

Yes

35mm CCD Digital Cinema Cameras

1920x1080

Sony F35, Genesis (2005)

No

No

Arri Alexa

2880x1620 or 2880?2160 depending on format

CMOS RAW or ProRes

Yes

No

Red Epic

“5k”

CMOS RAW

Yes

Yes

Sony F55

4096x2160

CMOS RAW or XAVC

Yes

Yes

Sony F65

Normally 4096x2160, 8192x2160 possible

CMOS RAW

Yes

Yes

Producing 4k requires an end-to-end 4k workflow including a 4k projector or display

11 Not all 4k is created equal

Not all 4k is created equal

Bayer pattern and CMOS RAW

Sony F65 2048 red pixels 4096 green pixels 2048 blue pixels Red Epic 1280 red pixels 2560 green pixels 1280 blue pixels Arri Alexa 720 red pixels 1440 green pixels 720 blue pixels

UHD TV Panel 3840 red pixels 3840 green pixels 3840 blue pixels

12 Delivering 4k to the consumer

Delivering 4k to the consumer

Compressed files are bigger than HD but not 4 times larger 4k adds high frequency detail, affect on encoding depends on content Files for SNE service are 2-3 times size of HD files 4k delivery becomes (more) practical with HEVC (H.265) codec Perhaps 35-40% more efficient Expect to see hardware decoders in 2014 Sony Pictures is requiring significantly better content protection than for HD Movielabs’ Enhanced Content Protection Specifications HDCP 2.2 protecting the HDMI link to the TV Sony TVs have HDCP 2.2, other 4k TVs do not HDCP 1.4 security is compromised

13 Availability of 4k in the consumer market

Availability of 4k in the consumer market

Sony shipped server loaded 11 4k movies with the 84” 4k TV in late 2012 Sony 4k Video Unlimited service launched 1st September Preload and download 4k movies and TV shows We expect Netflix to offer a 4k streaming service next year using HEVC Will need a lot of bandwidth to the consumer Sky and Sky Deutschland are experimenting with shooting sports in 4k “Mastered in 4k” Blu-ray discs were shot and finished in 4k and then downscaled to HD HD benefits from over sampling If there is to be a 4k Blu-ray, it will likely be 2015

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