Protected Interoperable File Format (PIFF) PIFF... · • PIFF was announced at IBC, and is...
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Protected Interoperable File Format (PIFF) The “Athens” Project Microsoft Corporation September 23, 2009 J. Simmons, M. Jeffrey TM4299 rev1
Transcript of Protected Interoperable File Format (PIFF) PIFF... · • PIFF was announced at IBC, and is...
Protected Interoperable File Format (PIFF)
The “Athens” Project
Microsoft Corporation
September 23, 2009
J. Simmons, M. Jeffrey
TM4299 rev1
Agenda
• A vision of the future
• The digital rights management dilemma
• Protected interoperable file format (PIFF)
• PIFF supported scenarios
• PIFF feature summary
• Protection System Specific Header box
• Track Encryption box
• Sample Encryption box
• References
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A Vision of the FuturePortable, protected online video content
• Will be accessible on all endpoints
• Will enable all key consumption scenarios
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Ubiquitous content protection• Will meet requirements of content providers• Will support interoperability between manufacturers• Will support extensibility for new manufacturers
Supply chain optimised • The key to online video market expansion• Will prevent a hodgepodge of walled gardens
Hi Def.
PlayReady
Marlin
OMA DRM
Other
Std Def.
PlayReady
Marlin
OMA DRM
Other
Low Def.
PlayReady
Marlin
OMA DRM
Other
Mobile
PlayReady
Marlin
OMA DRM
Other
Cost of Encoding a TV Episode
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Hi Hi
● OMA DRM
● Other
● PlayReady
● Marlin
● OMA DRM
● Other
● PlayReady
● Marlin
● OMA DRM
● Other
● PlayReady
Std Std Low Low
● OMA DRM
● Other
● PlayReady
● Marlin
● OMA DRM
● Other
● PlayReady
● Marlin
● OMA DRM
● Other
● PlayReady
MobileMobile
● OMA DRM
● Other
● PlayReady
● Marlin
● OMA DRM
● Other
● PlayReady
● Marlin
● OMA DRM
● Other
● PlayReady
Container &
Encryption
DRM Interoperability is achieved by
standardising the container & encryption.
The Digital Rights Management DilemmaImplementations are always proprietary, so how to make interoperable?
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Container &
Encryption
Rights Expressi
on Languag
e
Licensing Regime
Key Mgt System
Ease of StandardisationDifficult Easy
Nearly standardised today. Easy.
Always present & proprietary.
Tied to compliance rules
of licensing regime
Tied to authentication of licensing regime.
Protected Interoperable File Format (PIFF)
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• Standardisation of the encryption algorithm (AES-128, CTR or CBC mode)
• Generalisation of the ISO Base Media File Format “Scheme Signaling” mechanism to cover multiple DRM systems
• Support for all key use scenarios to address the supply chain optimisation problem.
Hi Def.PIFF
Std Def.PIFF
Low Def.PIFF
MobilePIFF
Optimising the Supply Chain
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Hi
Hi
● PIFF
Std
Std
● PIFF
Low
Low
● PIFF
Mobile
Mobile
• Also, the same format can be used for both streaming and download (e.g. rental or download to own)
• Studios can afford to encode more titles• Ecosystem becomes richer, more interoperable,
and much more convenient for consumers
PIFF Supported Scenarios
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• Adaptive bit rate streaming
• Second session or digital copy
• Internet download
• Progressive download and playback
• Side loading onto portable devices
• DRM interoperability and extensibility
• Late binding/muxing of alternate tracks
• Client targeted advertising
PIFF Feature Summary
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• Seamless adaptive bit rate streaming using fragmented form of ISO Base Media File Format
• Multiple DRM support using a standard encryption method and addition of three “uuid” boxes
– Protection System Specific Header Box
– Track Encryption Box
– Sample Encryption Box
Protection System Specific Header Box
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File Type
('ftyp')Movie ('moov')
Movie Header ('mvhd')
Protection System Specific Header ('uuid')
Track ('trak') x
[# tracks] ...
Movie Extends ('mvex')
Movie Extends Header ('mehd')
Track Extends ('trex')
Fragment x
[# fragments]
Movie Fragment Random Access
('mfra')
Track Fragment Random Access ('tfra') x
[# tracks]
Movie Fragment Random Access Offset ('mfro')
The Protection System Specific Header Box contains the data needed by a Content Protection System to play back the content. There can be any number of these boxes, added at any time.
Track Encryption Box
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Original Sample Entry with protected type
Protection Scheme Info ('sinf')
Original Format Box ('frma')
Scheme Type Box ('schm')
Scheme Information Box ('schi')
Track Encryption BoxThe Track Encryption box contains default values for the AlgorithmID, IV_size, and KID for the entire track. All Content Protection Systems use the same encryption algorithm. There is no DRM-Specific metadata at the track or sample level.
Movie Fragment ('moof')
Movie Fragment Header ('mfhd')
Track Fragment ('traf')
Track Fragment Header ('tfhd')
Track Fragment Run
('trun')
Independent and
Disposable Samples ('sdtp')
Sample Encryptio
n
Media Data
('mdat')
Sample Encryption Box
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Movie Fragment ('moof')
● Movie Fragment Header ('mfhd')
● Track Fragment ('traf')
Media Data ('mdat')
● Movie Fragment Header ('mfhd')
● Track Fragment Header ('tfhd')
●Track Fragment Run ('trun
●Independent and Disposable Samples ('sdtp')
●Sample Encryption
● Track Fragment ('traf')
● Track Fragment Header ('tfhd')
●Track Fragment Run ('trun
●Independent and Disposable Samples ('sdtp')
●Sample Encryption
The Sample Encryption Box contains the sample specific encryption data, including whether the sample is encrypted or not.
References
• Smooth Streaming Transport Protocol, http://learn.iis.net/page.aspx/684/smooth-streaming-transport-protocol/
• Protected Interoperable File Format (PIFF), http://learn.iis.net/page.aspx/685/protected-interoperable-file-format/
• Microsoft Community Promise, http://www.microsoft.com/interop/cp/default.mspx
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Standardisation Plans
• PIFF was announced at IBC, and is available on the web
• License is open to all and royalty-free
– See the Microsoft Community Promise for details
• Microsoft intends to work with others to seek formal standardisation of both PIFF and the associated Smooth Streaming protocols
• Exactly where these standards would be developed is not yet decided; however DVB is one possibility
• Companies interested in taking these ideas forward should contact [email protected]
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Thank You
M
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