Overview of HEVC/H.265 Transfer Syntax Supplement 195 DICOM WG4/13 - - PowerPoint PPT Presentation

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Aug 26, 2023 549 likes •681 views

Overview of HEVC/H.265 Transfer Syntax Supplement 195 DICOM WG4/13 HEVC ad-hoc group June 1 st , 2016 Video coding standards history MPEG-2 (1994): Standardized in DICOM in 2004 Compression ratio o Supplement #40 to MPEG-2 4

SLIDE 1

Overview of HEVC/H.265 Transfer Syntax Supplement 195

DICOM WG4/13 HEVC ad-hoc group June 1st , 2016

SLIDE 2

Video coding standards history

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MPEG-2 (1994): Standardized in

DICOM in 2004

Supplement #40
MPEG-4/AVC (2003):

Standardized in DICOM in 2010

Supplement #149 and #180
HEVC (2013): Proposed for

standardization into DICOM today

MPEG-2

Compression ratio to MPEG-2

4 2 1

AVC HEVC

SLIDE 3

Domain of application

Encode single or multi-frame video content
Can be used instead of AVC or MPEG-2
Should be used to compress the size of DICOM

video data

For compression of video of up to 4k resolution

and frame rate of 60fps

Main 10 profile usable for HDR and WGC content

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SLIDE 4

Needs for HEVC

Smartphones compatibility
HEVC content is already created
As of now, need transcoding to be used in DICOM
Higher compression efficiency
For optimized usage of server space

and network bandwidth

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SLIDE 5

Differences between AVC and HEVC

More efficient
Doubled compression rate
More complex
Supported by off the shelf hardware and software
Compression artifacts less obvious
Less “blockiness”

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SLIDE 6

Proposed HEVC profiles

HEVC has one profile per type of video
Supplement 195 proposes support for 2 profiles:
HEVC Main profile with level 5.1
4:2:0 content
Up to 8 bit depth
HEVC Main 10 profile with level 5.1
4:2:0 content
Up to 10 bit depth
Both for videos with up to 4k resolution at 60fps

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SLIDE 7

Proposed standardization

No new SOP Classes or IODs
Addenda to 6 parts of DICOM
2 new transfer syntaxes
HEVC Main profile
HEVC Main 10 profile
Essentially similar to AVC transfer syntaxes
Support for audio stream to be encompassed

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SLIDE 8

Availability of HEVC codecs

Market is already set up for HEVC 4:2:0 chips
New smartphones already support HEVC

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SLIDE 9

Licensing issues (1/2)

Fujitsu has no patent pertaining to the inclusion
f HEVC inside DICOM
HEVC is associated to 2 patent pools known to

the Editor of this supplement. No claims to the comprehensiveness of the following list. This is not intended as legal advice:

1) MPEG-LA patent pool:
http://www.mpegla.com/main/programs/HEVC/Documents/HEVCw

eb.pdf

Licensing fee only for hardware/software
Not per stream

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SLIDE 10

Licensing issues (2/2)

2) HEVC Advance
http://www.hevcadvance.com/pdf/RoyaltyRatesSummary.pdf
New patent pool // Controversial and criticized
Payment per stream IF stream is sold or rented to a customer

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SLIDE 11

Fragmenting HEVC streams

Should we loosen the constraint concerning

fragmenting?

Do we enforce the need for a key frame at the beginning
f a fragment?
This group recommends to loosen the constraint
Keep one DICOM object per stream
Limits to 2^31-1 maximum frames (19884 hours at 30fps)

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SLIDE 12

Next Steps

Checking the proposed supplement sanity
Publishing the supplement for public comment

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