Method and system for recognition of broadcast segments
US5621454A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Apr 15, 1997 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H2201/90
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a method of producing a signature characterizing an interval of a video signal representing a picture for use in broadcast segment recognition. The signature is produced based on portions of the video signal representing corresponding regions of the picture. The invention also serves to produce a corresponding mast word including a plurality of bit values each representing a reliability of a corresponding value of the signature. The first signature is formed having a plurality of values each of which is based on a respective one of the portions of the video signal. A second signature is formed also having a plurality of values each based on respective ones of a plurality of shifted portions of the video signal. The shifted portions each corresponds to a respective one of the video signal portions and has a location displaced from a location of the respective one of the portions by a predetermined amount, such that each value of the first signature corresponds to a value of the second signature. The respective values of the first and second signatures are compared and bit values of the mask word are established based on this comparison.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.