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Apparatus for recording and/or reproducing color video signals
| Details |
Inventors: Ishigaki, Yoshio; Tsuchiya, Takao; Niimura, Tsutomu;
Assignee: Sony Corporation (Tokyo, JA)
Primary Examiner: Martin; John C.
Assistant Examiner:
Attorney, Agent or Firm: Eslinger; Lewis H., Sinderbrand; Alvin
In apparatus for reproducing color video signals recorded in successive parallel tracks on a record medium with the chrominance components of video signals recorded in next adjacent tracks having first and second carriers which differ from each other in respect to their phases or polarity characteristics; and in which a plurality of transducers scan along the tracks one at a time so as to reproduce the video signals recorded in each of said tracks along with cross-talk signals from the tracks next adjacent thereto, means for separating said chrominance signal components from the luminance signal component in the reproduced signals, and a signal processing circuit including a switching circuit and a comb filter provides the separated chrominance components of video signals reproduced from each of said tracks with a common carrier and eliminates therefrom the chrominance components of the cross-talk signals on the basis of said different phases of the first and second carriers with which the chrominance components were recorded in the tracks which are next adjacent to each other: the changing-over of the switching circuit is controlled in response to the phase of the chrominance component carrier that results therefrom so as to ensure phase alignment of the common carrier with which the chrominance components of the video signals reproduced from the successive tracks are provided. Further, control signals are recorded on the record medium to identify those tracks in which video signals are recorded with their chrominance components having said first and second carriers, respectively, and, on reproducing, such identifying control signals are reproduced to control the movements of the transducers and, through such controlled movements, to regulate the changing-over of the switching circuit. |
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DETAILED DESCRIPTION Accordingly, it is an object of this invention to provide an apparatus for recording and/or reproducing color video signals which avoid the above described defects of the apparatus previously proposed for those purposes.
More specifically, it is an object of this invention to provide an improved apparatus for recording and/or reproducing color video signals in successive parallel tracks on a record medium, and in which such tracks can be abutting or even overlapping, that is, not provided with guard bands therebetween, for optimum utilization of the record medium, and further in which the signals reproduced from successive record tracks are of good resolution or quality, proper phase alignment is maintained in respect to the chrominance carriers of such reproduced signals, and cross-talk from ajdacent tracks is reduced or eliminated.
A more specific object of the invention is to provide an improved color video signal recording and/or reproducing apparatus, as aforesaid, in which both luminance and chrominance components of the color video signal can be recorded in adjacent tracks during every line interval, but in such a way that the cross-talk interference of low frequency or recorded chrominance components is inherently minimized or can be minimized by simple signal processing.
Another specific object of this invention is to provide an apparatus for recording and/or reproducing color video signals, as aforesaid, with devices for controlling the movements of recording and/or reproducing transducers or heads in respect to the record medium, for controlling the selection of the first and second carriers with which the chrominance components of the color video signals are recorded in next adjacent tracks, and for controlling the operation of a signal processor by which the chrominance signal components of video signals reproduced from successive tracks are provided with a common carrier of proper phase alignment while suppressing the chrominance signal components of cross-talk signals from next adjacent tracks
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TV Signal 
