JPS63140402A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To record two types of a signal by providing plural second heads to be located between respective heads and record the signal of the type different from the signal to first heads besides plural first heads to record one type of the signal. CONSTITUTION:By plural second heads 6 and 6 located between the first heads 2 and 2 and provided at the outer circumference of a drum 1, the signal of the type different from the signal by the first head 2 is recorded. When the drum 1 is rotated and a signal A is supplied to the first heads 2 and 2, a track 4 is formed on a tape 3, and when a signal B is supplied to the second head 6, a track 7 is formed. Namely, by two first and second pairs of heads 2 and 6, tracks 4 and 7, in which the signal A and the signal B are recorded, are alternately arranged. When this is applied to VTR, a video signal is recorded with the first heads 2 and 2 and when a PCM system audio signal is recorded with the second heads 6 and 6, a simultaneous recording reproducing can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a helical scan type magnetic recording and reproducing apparatus such as a VTR.

[Prior Art] FIG. 3 shows the main part of a conventional helical scan type magnetic recording/reproducing device. In the figure, (1) is a drum, and (2) and (2) are a pair of heads arranged equidistantly around the outer periphery of the drum (1) to record signals.

FIG. 4 is a diagram showing an example of the recording pattern of the magnetic tape according to the one shown in FIG. 3, and shows the state of the tape pattern when there are two video heads, a so-called two-head system, and the tape speed is in the standard mode. In the figure, (3) is a magnetic tape, and (4) is a track magnetized on the magnetic tape (3) by heads (2), (2), that is, a magnetization pattern.

(5) is the gap between the tracks (2), (2), that is, the guard band.

Next, the operation will be explained.

For those with two heads (2), the magnetization pattern on the magnetic tape (3) is the same as that of the fourth head when the tape speed is in standard mode.
Head (2) as shown.

A guard band (5) in which no signal is recorded is generated between the magnetized tracks (4) by (2).

Here, substantially the same number 43, that is, a signal from the same signal source, is recorded on each track (4), and once recorded, one type of signal is recorded on the tape (3).

When this magnetic tape (3) is reproduced, one type of recorded signal is reproduced.

[Problems to be Solved by the Invention] Since the conventional helical scan type magnetic recording/reproducing device is configured as described above, except when recording in the deep layer of the magnetic tape (3), only one type of signal can be used. It was impossible to record signals of different types.

This invention solves the above problems. The purpose of this invention is to obtain a magnetic recording/reproducing device capable of recording two types of signals.

[Means for Solving the Problems] The magnetic recording/reproducing device according to the present invention has a
In addition to the plurality of first heads that record one type of signal, another one
A plurality of second heads are provided between each of the first heads and record a signal of a different type from the signal to the first head.

[Function] In the magnetic recording and reproducing apparatus of the present invention, if different types of signals are applied to the first head and the second head at the same time, for example, two types of signals are simultaneously recorded on the magnetic tape. .

[Embodiments of the invention] Embodiments of the invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of the main parts of a helical scan type magnetic recording and reproducing apparatus according to the present invention, and the same parts as in the conventional one are given the same reference numerals and the explanation thereof will be omitted.

In the same figure, (El) and (6) are the first head (2).
, (2) a plurality of second heads provided on the outer periphery of the drum (1) and located between the first heads (
The signal according to 2) records a different type of signal.

Figure 2 shows the recording pattern of the magnetic tape according to the one in Figure 1. Letting the two types of signals be A and B, respectively, (4) is the track where signal A is recorded, and (7) is the signal. B is the recorded track.

Next, the operation will be explained.

The drum (1) rotates to the first head (2).

When signal A is supplied to (2), a track (0) is formed on the magnetic tape (3) shown in FIG.

When the second head (8) is supplied with signal B, a track (7) is formed. That is, the signal A and the signal B are transmitted by the first and second two sets of heads (2) and (8).
Tracks (4) and (7) on which are recorded are arranged alternately.

Next, an example applied to a VTR will be described. VTR
In the recording and reproduction of digital audio, that is, audio signals based on the PCM system, a video signal format is used for recording, so simultaneous recording of a video signal and a PCM audio signal is impossible. However, by introducing the configuration of this invention, the first head (2), (
2), the video signal is recorded, and the second head (8),
If a PCM audio signal is recorded in step (8), simultaneous recording and playback becomes possible.

Further, by applying separate audio signals to the first and second heads (2) and (6), and further using the deep recording method, it is also possible to record six channels of audio signals. Furthermore, two video signals of different types can be simultaneously recorded by the first and second heads (2) and (8).

In addition, in the above embodiment, it was shown that two types of signals were recorded simultaneously on the magnetic tape (3), but one type of signal was recorded on the magnetic tape (3) first, and later on the same magnetic tape (3) was recorded. Another signal may be recorded in (3).

[Effects of the Invention] As described above, according to the present invention, a plurality of Ml heads and a plurality of second heads that record a signal different from the signal to the first head are provided on the outer peripheral surface of the drum. Because we set up
It becomes possible to record two types of signals on the same magnetic tape.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the main parts of an example of a magnetic recording/reproducing device according to the present invention, FIG. 2 is a diagram showing an example of a recording pattern of a magnetic tape by the device of FIG. 1, and FIG. FIG. 4 is a block diagram of a main part of an example of a recording/reproducing apparatus, and FIG. 4 is a diagram showing an example of a recording pattern of a magnetic tape by the apparatus of FIG. 3. (1)...Drum, (2)...First head, (3
)...Magnetic tape, (6)...Second head. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] (1) A drum, a plurality of first heads that are equally distributed around the outer circumference of the drum and record signals on a magnetic tape, and a plurality of first heads that are located between each of the first heads and provided on the outer circumference of the drum. A magnetic recording/reproducing apparatus comprising a plurality of second heads for recording a different type of signal on the magnetic tape than the signal to the first head.