2:2 and 3:2 pull-down detection techniques

Details 2:2 and 3:2 pull-down detection techniques 2:2 and 3:2 pull-down detection techniques

2005-09-13

2009-11-03

Lee, M. (Department: 2622)

Television

Format conversion

Line doublers type

C348S448000, C348S449000

Reexamination Certificate

active

07612829

ABSTRACT:
Improved 2:2 and 3:2 pull-down detection techniques are presented. These techniques can, for example, be used when converting an interlaced video signal into a progressive video signal. The improved techniques are less susceptible to bad edits. In one embodiment, comparison values are generated using consecutive fields of the interlaced video signal having the same parity, with a sequence of one small comparison value followed four large comparison values, where the four large comparison values include two pairs of similar large comparison values, is used to indicate a 3:2 pull-down.

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