3:2 pull down detection in video
US8897358B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2011 |
| Grant date | Nov 25, 2014 |
| Priority date | — |
| Expiry date | Mar 7, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/0115
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods for processing of video sequences that may contain telecined (3:2 pull down) frame sequences are provided. A method for detecting 3:2 pull down is provided that measures vertical detail in frames of a video sequence and uses the variation in vertical detail over time to decide whether the video sequence contains normal interlace content or 3:2 pull down content. A method for improving the compression of detected 3:2 pull down content is also provided that controls the selection of field or frame coding mode for frames of 3:2 pull down content and the selection of reference fields for encoding duplicated fields in the 3:2 pull down content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.