Helical scan type information recording device
AssigneeVictor Company of Japan, Ltd.
InventorsTakeo Ohishi, Seiji Higurashi
Life of this patent
Estimating the term…
Abstract
A device for recording an information signal on a magnetic tape by using a helical scan include a rotary drum, a plurality of types of magnetic heads including at least one magnetic head of each of said types provided on the rotary drum for recording a corresponding type of the information signal, and switching units which switch said at least one magnetic head between a recording of the information signal and an erasing of the information signal. During rotation of the rotary drum, one type of said at least one magnetic head erases the information signal prerecorded on the magnetic tape before another type of said at least one magnetic head records a corresponding type of the information signal on the magnetic tape.
Claims11
A device for recording on a magnetic tape an analog information signal in an analog mode and a digital information signal in a digital mode by using a helical scan, said device comprising:
- a rotary drum;
- two analog magnetic heads, provided on said rotary drum, which record the analog information signal in the analog mode and have different azimuth angles from each other;
- two digital magnetic heads, provided on said rotary drum, which record the digital information signal in the digital mode and have different azimuth angles from each other;
- and
- a switching unit which switches said two analog magnetic heads between exclusive use thereof for recording of the analog information signal in the analog mode and exclusive use thereof for erasing of the digital information signal in the digital mode,
- wherein during rotation of said rotary drum in the digital mode, said two analog magnetic heads erase the digital information signal prerecorded on the magnetic tape before said two digital magnetic heads record the digital information signal on the magnetic tape.
A device for recording on a magnetic tape an analog information signal in an analog mode and a digital information signal in a digital mode by using a helical scan, said device comprising:
- a rotary drum;
- two analog magnetic heads, provided on said rotary drum, which record the analog information signal in the analog mode and have different azimuth angles from each other;
- two digital magnetic heads, provided on said rotary drum, which record the digital information signal in the digital mode and have different azimuth angles from each other;
- and
- a switching unit which switches said two analog magnetic heads between exclusive use thereof for recording of the analog information signal in the analog mode and exclusive use thereof for erasing of the digital information signal in the digital mode,
- wherein during rotation of said rotary drum in the digital mode, one of said two analog magnetic heads erases the digital information signal prerecorded on the magnetic tape before said two digital magnetic heads record the digital information signal on the magnetic tape.
A device for recording on a magnetic tape an analog information signal in an analog mode and a digital information signal in a digital mode by using a helical scan, said device comprising:
- a rotary drum;
- two analog magnetic heads, provided on said rotary drum, which record the analog information signal in the analog mode and have different azimuth angles from each other;
- a number N of digital magnetic heads, provided on said rotary drum, which record the digital information signal in the digital mode by forming N lines of tracks on the magnetic tape such that adjacent tracks are recorded at different azimuth angles;
- and
- a switching unit which switches said two analog magnetic heads between exclusive use thereof for recording of the analog information signal in the analog mode and exclusive use thereof for erasing of the digital information signal in the digital mode,
- wherein during rotation of said rotary drum in the digital mode, one of said two analog magnetic heads erases the digital information signal prerecorded on the magnetic tape before said digital magnetic heads record the digital information signal on the magnetic tape.
A device for recording on a magnetic tape an analog.sub.-- information signal in an analog mode and a digital information signal in a digital mode by using a helical scan, said device comprising:
- a rotary drum;
- two analog magnetic heads, provided on said rotary drum, which record the analog information signal in the analog mode and have different azimuth angles from each other;
- a number N of digital magnetic heads, provided on said rotary drum, which record the digital information signal in the digital mode by forming N lines of tracks on the magnetic tape such that adjacent tracks are recorded at different azimuth angles;
- and
- a switching unit which switches said two analog magnetic.sub.-- heads between exclusive use thereof for recording of the analog information signal in the analog mode and exclusive use thereof for erasing of the digital information signal in the digital mode,
- wherein during rotation of said rotary drum in the digital mode, said two analog magnetic heads erase the digital information signal prerecorded on the magnetic tape before said digital magnetic heads record the digital information signal on the magnetic tape.
A device for recording on a magnetic tape an analog.sub.-- information signal in an analog mode and a digital information signal in a digital mode by using a helical scan, said device comprising:
- a rotary drum;
- two analog magnetic heads, provided on said rotary drum, which record the analog information signal in the analog mode and have different azimuth angles from each other;
- a first set of digital magnetic heads which includes a number N of digital magnetic heads and records the digital information signal by respectively forming N lines of tracks on the magnetic tape such that adjacent tracks are recorded at different azimuth angles:
- and
- a second set of digital magnetic heads which includes a number N of digital magnetic heads and record the digital information signal by respectively forming N lines of tracks on the magnetic tape such that adjacent tracks are recorded at different azimuth angles;
- and
- a switching unit which switches said two analog magnetic heads between exclusive use thereof for recording of the analog information signal in the analog mode and exclusive use thereof for erasing of the digital information signal in the digital mode,
- wherein during rotation of said rotary drum in the digital mode, said two analog magnetic heads erase the digital information signal prerecorded on the magnetic tape before said second magnetic heads record the digital information signal on the magnetic tape.
Dependencies are inferred from the claim text.