Methods and apparatus to identify media using hash keys
US9438940B2 · kind B2 · utility
26Cited by
13References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 29, 2014 |
| Grant date | Sep 6, 2016 |
| Priority date | — |
| Expiry date | Sep 3, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/835
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.