JVET-AG0081 AHG9: On signalling privacy protection information in SEI message [C. Kim, Hendry, J. Lim, S. Kim (LGE)]

This contribution proposes to have a mechanism to convey privacy protection information (PPI) in an SEI message. The privacy protection can be in the form of removal and / or alteration of personal information. This can affect both machine analysis and human perception. Therefore, providing information about the removal or alteration of personal information can be valuable. Privacy protection information (PPI) indicates the methods applied to protect privacy and the type of personal information intended to be protected.

Two options are proposed to convey PPI privacy protection information in an SEI message as follows:

• Option 1: Define privacy protection optimization as a new optimization type in Encoder Optimization Information (EOI) SEI message.
• Option 2: Define a new SEI message to carry the privacy protection information.

It was commented that removal should be an another replacement type

It was commented that definition of info type (what kind of object specifically is being modified) has suc a large amount of variations that its precise definition is almost impossible (and possibly not necessary, as a device that knows which replacement type was used may be able to infer that.

It was commented to investigate whether JPEG has done something like this (in JPsec?)

Generally, including the general principle (with modifications as described) in EOI (option 1) is agreed to be the best option for now, would be beneficial for both huma and machine consumption, like other elements of that message.

Decision: Agreed to be included as optimization type in next version of the EOI SEI message.