G - Physics – 11 – B
Patent
G - Physics
11
B
352/18, 350/38
G11B 15/52 (2006.01) H04N 5/76 (2006.01) H04N 9/84 (2006.01)
Patent
CA 1055604
MAGNETIC RECORDING AND/OR REPRODUCING SYSTEM ABSTRACT OF THE DISCLOSURE In a system in which the polarity of the frequency con- verted chrominance signal or carrier is reversed during alternate lines of alternate fields recorded on alternate tracks on a recording medium and not reversed during the lines that make up the remaining alternate fields recorded in h-align- ment on the remaining alternate tracks positioned in inter- leaving relationship with the first-mentioned tracks, locgic- controlled switching means are provided to select the field intervals during which the plurality of the chrominance sub- carrier will be reversed in alternate lines. The same logic circuits can be used to control the switching during both recording and reproducing so that the alternate plurality reversal of the chrominance subcarrier will take place during the proper fields during reproduction of the recorded signals. Furthermore, the flip-flop that controls the switching circuit to reverse polarity of the chrominance signal or carrier is, itself, controlled to start always in the correct polarity in those field intervals when it is operative.
220086
Amari Shinji
Masuda Takashi
LandOfFree
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