scope:

This Recommendation defines methods, metrics and procedures for statistical evaluation, qualification and comparison of objective quality prediction models. This Recommendation can be used to assess any objective model that predicts a subjective judgement of a subjective test procedure. Guidance is provided on the design and cleansing of subjective test data, as well as the statistical metrics for model selection and characterization. Frameworks, metrics and example procedures are described. Specific procedures, minimum performance requirements or objectives to be used when selecting a model are not provided, as these depend on the scope of the model being assessed and are not part of this Recommendation. In this Recommendation, the term "sample" refers to any type of media, and the terms "model" and "algorithm" are interchangeable.