Television – Image signal processing circuitry specific to television – Chrominance signal demodulator
Patent
1995-06-08
1997-04-15
Lee, Michael H.
Television
Image signal processing circuitry specific to television
Chrominance signal demodulator
348726, 348420, 348412, H04N 712, H04N 736
Patent
active
056214774
ABSTRACT:
A system for the digital decoding of composite video signals (CVBS), comprising a brightness signal (luminance component Y) and two color difference signals (chrominance components U, V). The system modulates a color subcarrier according to the quadrature amplitude modulation principle, in which a plurality (N) of sample values of the video signal are transformed by a Walsh-Hadamard transformation (WHT) from the pixel domain into the WHT domain. The color difference signals (U, V) are derived as specific WHT coefficients of the WHT matrix obtained. The WHT coefficients determining the color difference signals (U, V) are subtracted from the WHT matrix. The WHT matrix is transformed back into the pixel domain an inverse Walsh-Hadamard transformation (IWHT), and the brightness signal (Y) are derived from the IWHT result.
REFERENCES:
patent: 4054909 (1977-10-01), Kojima et al.
patent: 4245330 (1981-01-01), Rebourg
patent: 4463377 (1984-07-01), Meyer-Ebrecht et al.
patent: 5157743 (1992-10-01), Maeda et al.
patent: 5384868 (1995-01-01), Maeda et al.
patent: 5428395 (1995-06-01), Jeong
Burgess Glenton B.
Lee Michael H.
Staudt Daniel J.
LandOfFree
Digital decoder and method for decoding composite video signals does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Digital decoder and method for decoding composite video signals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital decoder and method for decoding composite video signals will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-364722