H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/37, 352/18.3
H04N 5/92 (2006.01) H04N 5/923 (2006.01) H04N 9/84 (2006.01)
Patent
CA 1119714
ABSTRACT OF THE DISCLOSURE A method of and apparatus for recording a video signal in successive parallel tracks on a record medium, and for repro- ducing the recorded signal. The video signal. which may be the luminance component of a composite color television signal, fre- quency modulates a carrier to produce a frequency modulated video signal. The phase of the frequency modulated video signal is selectively shifted in selected line intervals and is recorded in parallel tracks such that the phase difference between fre- quency modulated video signals in at least some adjacently re- corded line intervals of successive tracks is an odd multiple of .pi.. In one embodiment, the difference between the phase of alternate line intervals which are recorded in one track and the phase of alternate line intervals which are recorded in the next adjacent track is equal to an odd multiple of .pi.. In accordance with another embodiment, the difference between the phases of successive line intervals which are recorded in the same track is equal to an odd multiple of .pi.. During reproducing, the successive tracks are scanned the frequency modulated signals recorded therein are reproduced together with a crosstalk compo- nent which is picked up by the transducer from an adjacent track, the crosstalk components being out of phase with each other. The reproduced frequency modulated signal is demodulated so as to recover the original video signal and an additional component, the latter being due to the phase shifting of the frequency modu- lated signal. The additional component then is eliminated from the recovered video signal. - 1 -
282622
Gowling Lafleur Henderson Llp
Sony Corporation
LandOfFree
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