The objective metrics can be classified as no reference, reduced reference, and full reference [5].
Reduced reference metrics (RR): the evaluation system has access to a small amount of side information regarding the original media.
The reconfigurable controller is designed on-line and automatically in an explicit model reference control framework so that the dynamics of the closed-loop system follows that of the performance reduced reference model under each fault condition.
Results highlight that the metric correlates well with subjective observations, also in comparison with commonly used full-reference metrics and with a state-of-the-art reduced reference metric.
Instead, reduced reference (RR) systems only require a limited set of numerical features extracted from the original signal, paying the (reasonable) additional cost of transmitting side information to the video chain endpoint.
If perfectly correlated, the standard deviation of the difference will be 0. Data from the VQEG reduced reference and no reference (RRNR-TV) test show an 18.1% increase for the 525-line experiment and a 9.6% for the 625-line experiment.
The reduced reference database contained 58,303 sequences (12,901 sequences were removed).
The reduced reference set contained only 21K compounds, a roughly 30-fold reduction, and the FMCT workflows were accordingly accelerated; for example, the pure MCS workflow requires only a few minutes per compound when used with the reduced reference set.
For example, on Lowes' recommended list at the moment is the Investec Dual Index Step Down Kick-Out Plan 8 (Collateralised) which, if all goes well, will pay out 10% a year – providing both the FTSE 100 and Euro Stoxx 50 indices "close above a reducing reference level, subject to five day averaging".
Surprisingly enough, bringing lobbyists from the backstage to the front stage would actually make things worse from the point of view of reducing reference to mere self-interest.
