G - Physics – 11 – B
Patent
G - Physics
11
B
350/37, 352/18.3
G11B 5/008 (2006.01) H04N 5/78 (2006.01) H04N 5/923 (2006.01) H04N 9/84 (2006.01)
Patent
CA 1118884
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, frequency modulates a carrier to produce a frequency modulated video signal. The phase of frequency modulated video signal is selectively shifted in selected line intervals and is recorded in parallel tracks such that the phase difference between frequency modulated video signals in at least some adjacently recorded line intervals of successive tracks is an odd multiple of ?. 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 ?. In accordance with another embodiment, the differ- ence between the phases of successive line intervals which are recorded in the same track is equal to an odd multiple of ?. The phase shift is attained by inserting a pulse signal into selected line intervals of the video signal in advance of the frequency modu- lation. During reproducing, the successive tracks are scanned and the frequency modulated signals recorded therein and reproduced to- gether with a crosstalk component 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 de- modulated so as to recover the original video signal and the in- serted pulse signal, the latter being eliminated form the recovered video signal. -i-
282624
Gowling Lafleur Henderson Llp
Sony Corporation
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