Low-delay conversion of 3:2 pulldown video to progressive format with field averaging
US6297848A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 25, 1998 |
| Grant date | Oct 2, 2001 |
| Priority date | — |
| Expiry date | Nov 25, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S348/911
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for low-delay conversion of 3:2 pulldown video to progressive format with field averaging is disclosed. The method considers 3:2 pulldown interlaced video that represents a four-frame motion picture film sequence as a ten-field interlaced video field sequence of three, two, three, two video fields per motion picture frame respectively for the four-frame sequence. One step of the method is the step of creating a ten-frame progressive video frame sequence, having a delay of approximately one field time with respect to the ten-field interlaced video sequence. This step is achieved by combining at one field time intervals a top field and a bottom field from the ten-field interlaced video sequence, where, at the time of combination, the top field and the bottom field are the most recently available top and bottom fields corresponding to the same motion picture film frame. The method comprises the further step of substituting, for the top field or the bottom field in the combining step, an average of that top or bottom field and the field two fields prior, when that top or bottom field and the field two fields prior correspond to the same motion picture film frame.…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.