Method and device for generating and detecting a fingerprint functioning as a trigger marker in a multimedia signal
US8020000B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 2004 |
| Grant date | Sep 13, 2011 |
| Priority date | — |
| Expiry date | Oct 23, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/8133
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This invention relates to a device and a method of relating one or more trigger actions with a multimedia signal and corresponding method and device for detecting one or more trigger actions in a multimedia signal. One fingerprint is generated on the basis of a segment of the multimedia signal at each trigger time point. The generated fingerprint(s) is stored in a database and communicated to playback devices. During playback fingerprints of the multimedia signal are generated and matched against fingerprints in the database. When a match is found, associated trigger actions is retrieved. The trigger time point is determined as a time point near or at a segment of the multimedia signal that caused a fingerprint to match. In this way, a simple and reliable way of detecting trigger markers for trigger actions is enabled without modifying the multimedia signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.