N17210, Working Draft 1 of ISO/IEC TR 23091-4 Usage of video signal type code points

This document contains a draft of a technical report on prominent video property description points combinations applied in the production industry. This output document is to be used for a discussion on a planned Technical Report (23091-4), which is a non-normative document of industry best practices on describing existing combinations of video properties, some of which are coding points and their representations in different carriage systems. The combinations of properties and the permutations of all possible values being considered can reach hundreds of choices to describe a stream and some of these combinations are not expected to be used in practice (such as using the ITU-R BT.2100 perceptual quantization (PQ) transfer characteristics with ITU-R BT.601 colour primaries). Only a small subset of these combinations (such as BT.2100 colour primaries with BT.2100 PQ and hybrid log-gamma transfer characteristics) is used in practice. This document aims to avoid mistaken assumptions on video property combinations made by vendors of various content processing tools that may be part of a production equipment chain. With the increased usage of high-dynamic range and the increased use of look-up tables in television systems, these content processing mistakes could increasingly become magnified. Lastly, this Technical Report aims to help its readers, especially toolset developers, in avoiding unnecessary, complicated tailoring of their content processing tools to specific areas of the workflow, and thus improve the repurposing of their tools to different parts of the workflow.