Methods and apparatus for recording programs prior to or beyond a preset recording time period
US6771885B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2000 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Feb 7, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/47214
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video signal is processed to generate one or more signatures associated with a broadcast program to be recorded by a recording device. The signatures are then processed to determine an actual start time and end time of the desired broadcast program, such that the program can be properly recorded despite delays or other changes in a pre-scheduled broadcast time of the program. One or more of the extracted signatures may be based at least in part on, e.g., a keyframe similarity measure, a histogram, one or more detected commercials, a transcript, a program logo or other detected object, detected text, and a sign-on or sign-off of the desired program. Other types of signatures can also be used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.