3:2 pull-down film mode detection using fuzzy logic

Details 3:2 pull-down film mode detection using fuzzy logic 3:2 pull-down film mode detection using fuzzy logic

2001-03-30

2004-03-09

Kostak, Victor R. (Department: 2611)

Television

Format conversion

Line doublers type

C348S700000

Reexamination Certificate

active

06704055

ABSTRACT:

BACKGROUND
Before being displayed by a progressive display device, NTSC video fields need to be deinterlaced first. As displayed on the progressive display device, the image quality of the deinterlaced fields depends on the type of deinterlacing process performed on the fields.
On the one hand, if the fields have originated from film frames by 3:2 pull-down, then deinteriacing the fields simply means merging fields that have originated from the same frame. As such, deinterlacing 3:2 pull-downed fields produces the best image quality on a progressive display device. However, on the other hand, if the fields are not generated by 3:2 pull-down but are deinterlaced as such, then the image quality of the progressively displayed images can be degraded by undesirable image saw-tooth.


REFERENCES:
patent: 5835163 (1998-11-01), Liou et al.
patent: 6385245 (2002-05-01), De Haan et al.

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