International organisation for standardisation organisation internationale de normalisation

25.2Contributions

Number	Session	Title	Source	Disposition
m33384	File Format	Comments on Pattern based encryption	[e-mail], Sylvain Kervadec	Noted

25.3Summary of discussions

25.3.1m33384 Comments on Pattern based encryption

The proponents of this scheme (and anyone else interested) are encouraged to consider this contribution and propose enhancements that address or ameliorate these issues. An example might be sub-sample information, but that would add a lot of data to the file. Maybe there is a more compact or algorithmic way to define the pattern. We wonder how much slice headers actually vary in size, to maybe the high limit would work if the variation is small.

We should indeed document how other codecs are handled and make clear that the NAL unit type table only applies to those specific codecs. Proponents encouraged to submit a contribution to address these (and we expect an NB comment formally making these questions to address).

(All the modes of common encryption only encrypt VCL NAL units, so extractors and aggregators would be in the clear.)

25.4Action Points / Ballots

ISO/IEC DIS 23001-7 2nd Edition (SC 29 N 13723)	Part 7: Common encryption format for ISO base media file format	DIS (2014-04-13)
ISO/IEC 23001-7:2012/PDAM 2 (SC 29 N 14057)	Part 7: Common encryption format for ISO base media file format AMENDMENT 2: Simple pattern-based encryption mode	PDAM (2014-05-12)

26.CICP (23001-8)

26.1Topics

26.1.1

26.2Contributions

Number	Session	Title	Source	Disposition
m33270	File Format	Updated defect report on 23001-8 CICP	[e-mail], David Singer	Accepted w14450
m33184		Update to Audio part of ISO/IEC 23001-8 (CICP)	Max Neuendorf	Accepted w14450

26.3Summary of discussions

26.3.1m33184 Update to Audio part of ISO/IEC 23001-8 (CICP)

This looks good. It might be good to say that in the new table that the rows roughly correspond with the old table, but if a label is needed or desired, it’s best to use the label from the configuration and not the old speaker position table. We probably have other updates as a result of the DRC work, and we should communicate with video that they may to amendment on their material separately on their own schedule.

CICP audio editor to prepare the amendment and request therefore, and the documents to be approved in audio.

26.4Action Points

27.Common encryption format for MPEG-2 TS (23001-9)

27.1Topics

27.1.1ISO/IEC 23001-9 Common encryption format for MPEG-2 TS

This format defines a way to encrypt media (audio, video, etc.) in files of the ISO base media file format family. By using a common encryption format, a single media asset can be used by several services and devices using different digital rights management systems, and the implementation complexity that would be consequent on having duplicate files and formats for the same content can be reduced or eliminated.