System apparatus and method for identifying video frames suitable for freeze-frame viewing
US5528381A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1994 |
| Grant date | Jun 18, 1996 |
| Priority date | — |
| Expiry date | Sep 8, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/85
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system, apparatus and method for automatically identifying frames of information in video format consisting of fields taken from the same frame or substantially similar frames of information in film format, and distinguishing such video frames from video frames consisting of fields taken from adjacent film frames. The sequential scan lines of successive video frame fields are filtered to remove high frequency fine detail, and are then compared pixel by pixel to corresponding pixels in the adjacent field. If the two fields within a video frame are substantially identical, the frame is identified as one containing fields from the same film frame or substantially similar frames and suitable for freeze-frame viewing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.