System and method for improved composite decoding

Details System and method for improved composite decoding System and method for improved composite decoding

2011-01-18

2011-01-18

Tran, Trang U (Department: 2422)

Television

Image signal processing circuitry specific to television

Chrominance-luminance signal separation

C348S638000, C348S665000, C348S507000

Reexamination Certificate

active

07872689

ABSTRACT:
A method of composite decoding in which the input signal is converted into the frequency domain, and the symmetry of frequency components with respect to the subcarrier frequency is compared. The comparison is varied in dependence upon the frequency being processed. In this way, the separation can be adapted to suit known characteristics of different portions on the input spectrum. This is particularly useful for processing NTSC signals. The allocation of a particular component to chrominance may be biased in dependence upon a measure of the luminance information of the composite signal at a corresponding spatial frequency.

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PCT International Search Report International Application No. GB/03/05690 International Filing Date: Dec. 22, 2003.
Patents Act 1977:Further Search Report under Section 17 Application No. GB 0229829 7 Date of Search: Nov 11, 2003.

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