Methods and apparatus to identify media using hash keys

摘要

Methods and apparatus are disclosed to identify media using hash keys. An example method involves when a first metered hash key does not match a first reference hash key, generating, with a processor, an error level using a bitwise comparison of the first metered hash key and a second reference hash key corresponding to a second metered hash key. When the error level satisfies a threshold, the example method involves obtaining, with a processor, media reference data stored in association with the second reference hash key, and storing, with a processor, the media reference data in association with the first metered hash key.

主权项

1. A method comprising:
when a first metered hash key does not match a first reference hash key, generating, with a processor, an error level using a first bitwise comparison of the first metered hash key and a second reference hash key, the second reference hash key corresponding to a second metered hash key; determining, with the processor, if the error level satisfies a threshold; and when the processor determines that the error level satisfies the threshold:
obtaining, with the processor, media reference data stored in association with the second reference hash key, andstoring, with the processor, the media reference data in association with the first metered hash key.