Method for separating chrominance and luminance components of a

Details Method for separating chrominance and luminance components of a Method for separating chrominance and luminance components of a

1990-07-26

1992-11-03

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 11, 358140, H04N 978

Patent

active

051610060

ABSTRACT:
A method for decoding National Television System Committee (NTSC) signals which exploits redundancies in film-to-NTSC transcoding, known as "3-2 pull-down". The decoding method estimates luma (Y) and chroma (C). The "3-2 pull-down" structure assigns three NTSC fields to one frame of a film frame pair, and two NTSC fields to the other film frame. Luma and chroma in different film frames are separated using different methods, and the separated signals are better than the separated signals achieved using conventional one dimensional and two dimensional NTSC decoding methods. The new method for separating luma and chroma from composite NTSC signals can be combined with an interlace-to-progressive method, which converts the decoded 3-2 NTSC signals to 2 film frames, and an upconversion procedure, to yield improved image quality.

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