Quality metrics

Abstract

An apparatus comprising: at least one processor: and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform: defining or generating an information message for enabling a region-based signaling of quality metric: and when the region-based signaling of the quality metric is enabled, signaling one or more of following: a number of regions in a picture: type of regions: region index method indicator for the regions: a region index for each region: or a measure or value for each quality metric and/or each color component of the each region.

Dependencies are inferred from the claim text.