SYSTEM FOR CORRELATING METADATA

Disclosed are methods and apparatus for correlating metadata from a plurality of different sources. The methods and apparatus may use an order for the data sources. The metadata from each of the data sources may be divided or split into one or more chunks. The metadata from each of the chunks may be filtered and sorted, e.g., to ensure that the metadata relate to the same multimedia content. The metadata chunks from the first data source in the order and the second data source in the order may then be aligned to produce currently aligned metadata. The metadata data chunks from the next data source in the order may then be aligned with the currently aligned metadata to produce new currently aligned metadata. This process may be repeated until the metadata from all of the sources are aligned, thereby providing a set of correlated metadata.