H - Electricity – 04 – N
Patent
H - Electricity
04
N
352/17, 352/18,
H04N 9/80 (2006.01) H04N 9/64 (2006.01) H04N 9/83 (2006.01) H04N 9/86 (2006.01)
Patent
CA 1226937
ABSTRACT OF THE DISCLOSURE A digital conversion system for a color video signal comprising a system which selectively converts an analog composite color video signal and analog primary color video signals to digital signals includes: a matrix circuit (17) which forms a luminance signal and first and second color difference signals from the input analog primary color video signals, and a switching circuit (18) which converts the first and second color difference signals to a sequential color difference signal. A switch (28) selects the luminance signal from the matrix circuit (17) or the input NTSC analog composite color video signal. A first analog to digital converter (411 receives an output from the switch (28); and a second analog to digital converter (42) receives the sequential color difference signal. A digital composite color video signal or a digital luminance signal is obtained from the first analog to digital converter (41), and a digital line sequential color difference signal is obtained from the second analog to digital converter (42). The line sequential chrominance signal can be digitized by a single inexpensive A/D converter which has a slow processing speed, so as to produce an inexpensive digital conversion system which is small.
463939
Arai Masaaki
Sasaki Takayuki
Gowling Lafleur Henderson Llp
Sony Corporation
LandOfFree
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