The encoding scheme used determines the quality of the stored information. Some encoding schemes, such as JPEG and MPEG, are lossy. The low level parameters should not be viewable due to the specific nature of the parameters. Only generic quality factors should be viewable. Real-time constraints are concerned with the sampling rates of record and playback.
Temporal correlations are concerned with the timing between media objects, such as synchronization.
All that is needed to construct the derived object is the non-derived objects and various parameters needed in the transformation. The derived object may or may not be stored in the database depending upon the available space and the resources required to construct the derived object. This is usually in the form of spatial or temporal relationships.