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32nd Meeting: Hannover, DE, October 2023 2023-10-06 10:31
AHG9: On the SEI processing order SEI message
Authors: Takeshi Chujoh Sharp Yukinobu Yasugi Sharp Tomohiro Ikai Sharp
Abstract
The SEI processing order SEI message carries information indicating the preferred processing order, as determined by the encoder, for different SEI messages. As a result of examining the specification of the SEI processing order SEI message, three problems have been identified. This contribution discusses the solutions to these problems. The first problem is an editing problem for a variable. The second problem is the difference between the input picture size of two SEI messages and the other SEI messages. The third problem is that the input picture information of concatenated SEI messages needs to be re-specified. Several possible solutions to these problems have been presented.
Meeting Notes
JVET-AF0070 AHG9: On the SEI processing order SEI message [T. Chujoh, Y. Yasugi, T. Ikai (Sharp)]

The SEI processing order SEI message carries information indicating the preferred processing order, as determined by the encoder, for different SEI messages. As a result of examining the specification of the SEI processing order SEI message, three problems have been identified. This contribution discusses the solutions to these problems. The first problem is an editing problem for a variable. The second problem is the difference between the input picture size of two SEI messages and the other SEI messages. The third problem is that the input picture information of concatenated SEI messages needs to be re-specified. Several possible solutions to these problems have been presented.

The following problems were reported in the texts of the SEI processing order SEI message.

  • Problem 1: The definition of the variable SeiProcessingOrderSeiList is not clear. This variable may not be needed.
  • Problem 2: The input picture size of SEI processing order messages is not constant. According to H.266 (V3), the input picture size of the film grain characteristics SEI message and the decoded picture hash SEI message is the non-cropped picture. The input picture size of the other SEI massages of image processing is cropped picture.
  • Problem 3: There are differences between the input and output picture information of several SEI massages. For example, NNPFC and NNPFA SEI massages satisfy this condition. When those SE messages are concatenated, the input picture information of the order list of SEI processing order SEI message should be redefined.

Problem 1 was already resolved (see notes elsewhere).

About problems 2 and 3: It was agreed that input/output relationships at every interface of the chain shall precisely be defined. JVET-AF0061 proposes a solution on that which does not need additional syntax. (see further notes there; these aspects were reviewed Sun 15 Oct. as well).

About problem 2: Disallowing decoded picture hash is useful and was agreed.

ARCHIVE :
JVET-AF0070-v1.docx
Decisions
About problem 2: Disallowing decoded picture hash is useful and was agreed.
Citation