From e9495d188b2e67baf08876f31d9d11d34cb9c62e Mon Sep 17 00:00:00 2001 From: Wan-Teh Chang Date: Mon, 8 Apr 2024 15:22:20 -0700 Subject: [PATCH] Change non-layer-specific OBUs "must" to "should" For backward compatibility, downgrade the requirement OBUs that are not layer-specific must have the obu_extension_flag set to 0. to a recommendation OBUs that are not layer-specific should have the obu_extension_flag set to 0. --- 07.bitstream.semantics.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/07.bitstream.semantics.md b/07.bitstream.semantics.md index dceec2a0..eab99826 100644 --- a/07.bitstream.semantics.md +++ b/07.bitstream.semantics.md @@ -81,7 +81,7 @@ possible by preventing emulation of MPEG2 transport stream ids. Reserved units are for future use and shall be ignored by AV1 decoder. The column “Layer-specific” indicates if the corresponding OBU type is considered to be associated with -a specific layer ("Y"), or not ("N"). OBUs that are not layer-specific must have the obu_extension_flag set to 0. +a specific layer ("Y"), or not ("N"). OBUs that are not layer-specific should have the obu_extension_flag set to 0. Metadata OBU types may or may not be layer-specific, depending on the metadata type. The table in Section 6.7.1 specifies which types of metadata OBUs are layer-specific and which are not.