Multidimensional interpretation of NTSC encoding and decoding

Abstract

NTSC color encoding and decoding are analyzed in spatiotemporal frequency space. The mapping of important 1-D electrical frequencies, such as the color subcarrier, into 3-D space is discussed. Spatiotemporal frequencies that contribute to cross-color and cross-luma artifacts become readily apparent in the 3-D spectral domain. The use of matched pre- and postfilters to decrease and theoretically eliminate luma/chroma crosstalk is discussed. Lowpass/bandpass, line-comb, and field-comb implementations are examined.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>