JPH0481801B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic recording and reproducing device, and more particularly to a recording and reproducing device that performs recording and reproducing using a magnetic head provided on a rotating drum.

Conventional technology Conventionally, rotating drum type magnetic recording and reproducing devices are
In general, many rotating magnetic heads are capable of recording and reproducing only one type of information signal. In recent years, devices that can simultaneously record and reproduce two types of information signals have been developed, and the information signals of these devices are a video signal and an audio signal.

Problems to be Solved by the Invention The device capable of simultaneously recording and reproducing the two types of information signals described above is not capable of simultaneously recording and reproducing a plurality of different video signals.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic recording and reproducing apparatus that can simultaneously record and reproduce a plurality of different video signals and is compatible with conventional systems.

Means for solving the problem In FIG. 1A, the first channel magnetic head section 1a
and 1b constitute a magnetic head set, and the second
The channel magnetic head parts 2a and 2b constitute a magnetic head set, thereby providing a plurality of magnetic head sets, each of which has a different azimuth angle, is provided adjacently in the track width direction, and has a plurality of magnetic head sets. The total recording track width on the magnetic tape recorded by the first channel magnetic head sections 1a and 1b and the total recording track width on the magnetic tape recorded by the second channel magnetic head sections 2a and 2b are different from each other. The recording track width was made equal to the recording track width recorded by one magnetic head of the above system.

Operation In FIG. 1B, the magnetic head section 2a records and reproduces the track 3a, the magnetic head section 2b records and reproduces the track 3b, and as shown in FIG. 2, the conventional magnetic head 5a track 3b
The magnetic head 5b reproduces the track 4b. Also, as shown in FIG. 3, tracks 6a and 6b recorded by conventional magnetic heads are reproduced by magnetic head sections 2b and 1b, respectively.

Embodiment FIG. 1A shows a layout diagram of a magnetic head used in a first embodiment of the apparatus of the present invention. In the same figure, 1a, 1
Reference numeral b denotes a first channel magnetic head portion, which is constructed with different azimuth angles of +a° and +b°, and is arranged in parallel in the track width direction.
Similarly, second channel magnetic head sections 2a and 2b are constructed with different azimuth angles of -a° and -b°, respectively, and are arranged in parallel in the track width direction. Magnetic head parts 1b, 2b
The azimuth angle ±b° is the same as the conventional method, for example, ±6°.
is set to .

First channel magnetic head portions 1a, 1b, second channel magnetic head portions 1a, 1b,
The channel magnetic heads 2a, 2b are mounted on a rotating drum 180° apart. Also, the total track width T of the tracks recorded on the magnetic tape by the magnetic head sections 1a and 1b, and the total track width T of the tracks recorded on the magnetic tape by the magnetic head sections 1a and 1b,
The total track width T of the tracks recorded by the magnetic head 1b is configured to be equal to the width of the track recorded by one magnetic head in the conventional method.

If a magnetic head having such a configuration is used, two different pieces of video signal information can be recorded simultaneously, and the track pattern will be as shown in FIG. 1B. In the figure, track 3a is a track recorded by magnetic head section 2a, and track 3b is a track recorded by magnetic head section 2a.
is a track recorded by the magnetic head section 2b, track 4a is a track recorded by the magnetic head section 1a, and track 4b is a track recorded by the magnetic head section 1b. When such a track is reproduced by the magnetic head shown in FIG. 1A, two different video signals can be simultaneously reproduced.

Also, since the tracks 3b and 4b are tracks recorded on the magnetic heads 1b and 2b having an azimuth angle of ±6° similar to the conventional system, as shown in FIG. It can be played back.

Furthermore, assuming that the track patterns recorded by the conventional magnetic heads 5a and 5b are tracks 6a and 6b in FIG. , 2b.

FIG. 4 shows a layout of a magnetic head used in a second embodiment of the device of the present invention. The first channel magnetic head sections 1a' and 1b' are provided at azimuth angles of +a° and +b° and are slightly shifted in the time axis direction.Similarly, the second channel magnetic head sections 2a' and 2
b' are provided at azimuth angles of -a° and -b°, slightly shifted in the time axis direction. The other configurations and effects are the same as those shown in FIG. 1A, so their explanation will be omitted.

Effects of the Invention According to the present invention, it is possible to provide a magnetic recording/reproducing device in which all the magnetic heads constituting a plurality of magnetic head sets have different azimuth angles. The present invention provides a magnetic recording/reproducing device which has the feature of improving the unobtainable crosstalk between adjacent tracks, and further has the azimuth angle of the magnetic heads constituting the magnetic head set equal to the azimuth angle of the magnetic heads of other systems. Since it can be provided, it has the advantage of being compatible with recording and reproduction using other systems.

[Brief explanation of drawings]

FIGS. 1A and 1B are layout diagrams of the magnetic head and its recording track pattern used in the first embodiment of the apparatus of the present invention, and FIGS. 2 and 3 are tracks for explaining compatibility with the conventional system. pattern, 4th
The figure is a layout diagram of a magnetic head used in a second embodiment of the device of the present invention. 1a, 1b...first channel magnetic head section,
2a, 2b...second channel magnetic head section, 3
a, 3b, 4a, 4b, 6a, 6b...track, 5a, 5b...conventional magnetic head, T...
...track width.

Claims (1)

[Scope of Claims] 1. In a magnetic recording/reproducing device having a plurality of magnetic head sets each including a plurality of magnetic heads adjacent to each other in the track width direction, all the magnetic heads constituting the plurality of magnetic head sets have different azimuths. The recording track width formed by the magnetic head set is equal to the recording track width formed by other types of magnetic heads, and the azimuth angle of the magnetic heads constituting the magnetic head set is different from that of the other type. 1. A magnetic recording/reproducing device characterized in that the azimuth angle is equal to the azimuth angle of a magnetic head of the method.