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Details
Inventors: Eguchi, Takeo;
Assignee: Sony Corporation (Tokyo, JP)
Primary Examiner: Canney; Vincent P.
Assistant Examiner:
Attorney, Agent or Firm: Eslinger; Lewis H., Sinderbrand; Alvin

Apparatus for recording and reproducing digital color video signals from successive, parallel tracks on a magnetic tape includes a rotary guide drum about which the magnetic tape is wrapped for an angle greater than a nominal angle of 180.degree. for real time recording and reproduction; a recording section including time base expander circuits for expanding the time base of the digital color video signals, and two diametrically opposite pairs of recording rotary magnetic heads, with the recording rotary magnetic heads of each pair having magnetic gaps with different azimuth angles for recording the time base expanded video signals in the parallel tracks; and a reproducing section including two diametrically opposite pairs of reproducing rotary magnetic heads, with the reproducing rotary magnetic heads of each pair having magnetic gaps with different azimuth angles, for reproducing the time base expanded video signals from the parallel tracks, and time base compression circuits for compressing the time base of the time base expanded video signals to return the same to its original time base, thereby providing a lower Nyquist frequency, while also providing a high signal-to-noise ratio with a sufficiently wide frequency range, and without increasing the diameter of the guide drum.

DETAILED DESCRIPTION Accordingly, it is an object of this invention to provide a method and apparatus for recording and/or reproducing information signals that avoids the above-described difficulties encountered with the aforementioned arrangements.
More particularly, it is an object of this invention to provide a method and apparatus for recording and/or reproducing digital video signals with a low Nyquist frequency.
It is another object of this invention to provide a method and apparatus for recording and/or reproducing information signals with a high S/N ratio without increasing the size of the tape guide drum.
It is still another object of the invention to provide a method and apparatus for recording and/or reproducing information signals with a high S/N ratio and with a sufficiently wide frequency range.
In accordance with an aspect of this invention, apparatus for recording and reproducing original information signals in a plurality of tracks on a record medium, includes a recording section having time base expansion means for expanding the time base of the information signals to produce time base expanded information signals, and a plurality of magnetic heads for recording the time base expanded information signals on the record medium; and a reproducing section having a plurality of magnetic heads for reproducing the time base expanded information signals from the record medium, and time base compression means for time base compressing the time base of the time base expanded information signals to produce the original information signals.
The above, and other, objects, features and advantages of the present invention will become apparent from the following detailed description thereof which is to be read in connection with the accompanying drawings.



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