The Nielsen Comapny (us), LLC

Donald Miner

Daniel John Nelson

Apparatus, system, methods, and articles of manufacture are disclosed to identify media using hash keys. An example system includes a hybrid hash key analyzer to access a metered hash key of an exposure record obtained from a meter, access reference records representative of respective portions of a plurality of media, and determine reference confirmation data candidates from respective ones of the reference records that include hash keys matching the metered hash key. The example system includes an impression logger to, when first confirmation data associated with the exposure record matches one of the reference confirmation data candidates, store an impression record that associates the media identification data associated with the matching one of the reference confirmation data candidates with a meter identifier of the exposure record. The impression logger also is to credit at least a portion of the media corresponding to the media identification data with an exposure credit.

Methods and apparatus to identify media using hybrid hash keys

Methods and apparatus are disclosed to identify media using hash keys. An example disclosed method includes generating a hash key based on first samples of media. In the disclosed example method, the first samples corresponds to a portion of the media sampled in a buffer of a computing device. The example method also includes applying a blurring function to the hash key to generate a blurred hash key. The example method also includes generating first confirmation data based on second samples of the media. The example method also includes storing the blurred hash key in association with the first confirmation data and first reference data in a memory separate from the buffer of the sampled media. In the example methods, the reference data identifies the portion of the media.

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Severna Park, MD, United States of America

Donald Miner