Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.

What does “Max unique quant tables” in the visual profiles and levels annex mean?

April 26, 2017annex levels mean Profiles Visual

0

Posted

What does “Max unique quant tables” in the visual profiles and levels annex mean?

1 Answer

0

Posted

This column of the profiles and levels table specifies the maximum number of unique quantization tables that each profile/level combination can use for all of the objects in a visual scene. How the tables are configured (ie how many of each type) is left to the encoder. For example, Main Profile/Level 2 allows up to 4 unique quantization tables for 16 objects. Without gray-shapes, it is possible to have 3 intra tables and 1 inter table, or 2 intra and 2 inter tables etc. With gray-shapes, it is more likely that the table configuration would result in 2 texture tables (1 intra and 1 inter), and 2 gray-shape tables (1 intra and 1 inter).