Method and system for producing a signature characterizing an audio broadcast signal
US5612729A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Mar 18, 1997 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H2201/90
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and system for producing a signature which characterizes an audio broadcast signal for use in broadcast signal recognition, wherein the signature is based on a comparison of time-displaced frequency band values each representing a respective frequency band of the audio broadcast signal. Each of a first group of the frequency band values is compared with a respective value from the second group representing portions of the audio broadcast signal within the same predetermined frequency band. At least a part of the signal portions represented by the second group were broadcast prior to the signal portions represented by the first group, and a signature is formed based on the comparison of the first and second groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.