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

2007-04-10

2007-04-10

Hsia, Sherrie (Department: 2622)

Television

Format conversion

C348S448000, C348S452000

Reexamination Certificate

active

10119999

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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PCT/ISA, “International Search Report” mailed on Oct. 22, 2004 in corresponding PCT/US03/10858, 4 pages.

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