| 摘要 |
Frequency modulated sound carrier waves and frequency modulated picture carrier waves are combined in an adder, and the sum is clipped to develop a recording signal input for an electron beam disc recorder. To reduce possible sound carrier interference in pictures reproduced from signals recovered during disc playback, sound carrier waves, in quadrature phase relation to those applied to the adder, are combined with composite video signals to form the modulating signal input to the picture carrier frequency modulator.
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