JPH05182107A - Tape recorder - Google Patents

Abstract

PURPOSE:To erase a recording track of an analog signal recording even though a tape is inversely loaded by erasing the symmetrical region of a recording track with respect to the tape center and the recording track of analog signal recording by an erasing magnetic head. CONSTITUTION:In a digital audio tape recorder, an erasing magnetic head 22 has gaps GA1 and GA2 for an audio track erasing and in the center a time code track TC erasing gap GT is formed. Moreover, an auxiliary gap GH is formed to erase the region which is symmetrical to the track TC with respect to the track center. By this arrangement, when a magnetic tape is inversely loaded, the gaps GA1 and GA2 erase audio tracks A2 and A1 and the gaps GT and GH erase recording tracks D13 and TC. Therefore, even though the tape is inversely loaded and recorded, audio signals are surely reproduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape recorder,
In particular, it is suitable for application to a tape recorder that records and reproduces a digital audio signal using an open reel magnetic tape.

[0002]

2. Description of the Related Art Heretofore, some tape recorders of this type have been designed so that an audio signal can be converted into a digital signal and recorded on an open reel magnetic tape (hereinafter referred to as a digital audio tape recorder). ..

That is, in this type of digital audio tape recorder, as shown in FIG. 3, 28 recording tracks are formed in the longitudinal direction of the magnetic tape having a width of 1/2 inch centering on the tape center.

In the recording tracks A1 and A2 at both ends (hereinafter referred to as audio tracks), an audio signal is recorded in the form of an analog signal, whereas the upper and lower 12 adjacent to the audio tracks A1 and A2 are recorded.
Channel recording tracks D1-D12 and D13-D
At 24, a digital audio signal is recorded. Center 2 adjacent to each other with a track center in between
In the book recording track, the upper recording track is allocated to the control track CTL, while the lower recording track is allocated to the time code track TC.

As a result, the digital audio tape recorder can reproduce the digital audio signal with reference to the control signal recorded in the control track CTL.

When a magnetic tape that has already been recorded is newly rerecorded, the digital audio tape recorder performs overwriting recording to erase the digital audio signal and the control signal and record a new signal. Further, in the digital audio tape recorder, the erasing magnetic head is used to erase the audio tracks A1 and A2 and the time code track TC,
Then, a new signal is recorded.

That is, since the recording wavelength is long in the analog audio signal and the time code signal,
There is a feature that old signals cannot be completely erased even by double recording. Therefore, in the digital audio tape recorder, a dedicated erasing magnetic head is provided to erase the analog audio signal and the time code signal.

[0008]

By the way, in this kind of digital audio tape recorder, when a signal is newly recorded on a recorded magnetic tape, as shown in FIG. After winding, the winding-side reel T may be pulled back and mounted on the supply-side reel base as shown by the arrow a (hereinafter referred to as "reverse rake").

In this case, as shown in FIG. 5, in the erasing magnetic head 4A, audio tracks A1 and A2 are used.
Delete gears G1 and G2 for audio track A2
And A1 are erased, while time code track T
The gear GT for erasing C is a control track CTL.
Erase. As a result, in the magnetic head 6 for recording,
For the recording tracks D1 to D12, D13 to D24, the audio tracks A1 and A2, and the time code track TC, the signals can be correctly recorded, while for the control track CTL, the overwriting of the conventional time code track TC Record the control signal on.

In this case, in the time code track TC, since the recording wavelength is long, the original signal cannot be completely erased even in the double recording, and the control signal cannot be correctly reproduced at the time of reproduction. Therefore, in this type of digital audio tape recorder, there is a problem that it is difficult to correctly reproduce the audio signal when the data is reversed and recorded.

The magnetic heads 8D and 8A are reproducing magnetic heads for reproducing a digital audio signal, an analog audio signal and a time code signal, respectively.

If this problem can be solved, in this type of digital audio tape recorder,
Since it is not necessary to wind the magnetic tape 1 around the supply-side reel S one by one, the usability can be improved accordingly. Further, even if the types of digital audio tape recorders are different, the erasing magnetic head can be shared, which is convenient.

That is, as shown in FIGS. 6 and 7, in this type of digital audio tape recorder,
After fixing the magnetic head 4A to a predetermined base 9, the base 9 is fixed to the chassis 10. At this time, in the digital audio tape recorder, a mechanism for fixing the base 9 to the chassis 10 as it is (FIG. 6) and the base 9
The chassis 10 through the predetermined member 12
There is a mechanism to fix it (Fig. 7).

In this case as well, the magnetic heads 4A fixed to the base 9 are in a positional relationship such that the magnetic tapes are reversed from each other, and as shown in FIGS. 8 and 9, the exclusive position of the central gear is different. Erasing magnetic head 4A
1 and 4A2 are required. The present invention has been made in consideration of the above points, and an object thereof is to propose a tape recorder which can correctly reproduce an audio signal even when reversed.

[0015]

In order to solve the above problems, according to the present invention, recording tracks A1, A2, TC for recording analog signals and recording tracks D1 to D24 for recording digital signals in the longitudinal direction of the magnetic tape 1 are provided. , CTL are formed, the audio signal is converted into a digital signal and recorded on the recording tracks D1 to D24 for recording the digital signal. In the tape recorder 20, the recording tracks A1, A2, TC for recording the analog signal are erased. Analog signal recording track A1 to tape center,
Erase magnetic head 2 for erasing a region symmetrical with A2 and TC
2 and recording tracks A1, A2, TC for analog signal recording in the area scanned by the erasing magnetic head 22 and recording tracks D1 to D1 for digital signal recording.
D24, and the recording magnetic head 42 forming the CTL.

[0016]

The magnetic head 22 for erasing erases the recording tracks A1, A2, TC for recording analog signals, and at the same time, the recording tracks A1, A2 for analog signals to the tape center.
By erasing the area symmetrical to A2 and TC, even if the recording is reversed, recording tracks A1 and A2 for analog signal recording,
TC can be erased.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1, reference numeral 20 denotes a digital audio tape recorder as a whole, which fixes a magnetic head 22 and the like to a chassis via a base 28. Here, the erasing magnetic head 22 is fixed to the base 28 via the position adjusting member 26, thereby erasing a predetermined area of the magnetic tape.

In the base 28, a reproducing magnetic head 23 is arranged on the magnetic tape supply side of the erasing magnetic head 22, and the reproducing magnetic head 23 is used for the audio tracks A1 and A.
2. The recording tracks D1 to D24, the control track CTL, and the time code track TC can be reproduced. As a result, the digital audio tape recorder 20 can edit the audio signal prior to recording based on the reproduction signal obtained via the reproducing magnetic head 23, and record the resulting audio signal. The magnetic head 42 is used for recording.

That is, the recording magnetic head 42 is arranged adjacent to the reproducing magnetic head 23 on the magnetic tape winding side, and the reproducing magnetic tape 44 is arranged on the magnetic tape winding side of the recording magnetic head 42. It is designed to be done.

On the other hand, the base 28 holds the guide posts 30 to 38 so that the guide posts 30 to 38 are erected, so that the magnetic tape can stably run on the magnetic heads 22 to 44.

As shown in FIG. 2, the magnetic head 22 for erasing has upper and lower gears GA2 and GA1 for erasing the audio track, and a gear GT for erasing the time code track TC at the center thereof. It is done like this. In addition to this, an erasing magnetic head 2
2 is the time code track T for the track center
An auxiliary gear GH for erasing a region symmetrical to C is formed, whereby a recording track D is recorded by the auxiliary gear GH.
Erase 13

Therefore, in the digital audio tape recorder 20, when the magnetic tape is reversed,
Gears GA1 and GA2 for audio track A2,
While A1 can be erased, the recording track D13 and the time code track TC can be erased by the gear GT and the auxiliary gear GH, respectively. As a result, when recording the control signal, the digital audio tape recorder 20 can record the control signal in an area where the signal has been completely erased even when the control signal is reversed. It is possible to reliably reproduce the audio signal.

Further, in the digital audio tape recorder 20, by using the erasing magnetic head 22, the time code signal can be completely erased and the control signal can be recorded even when it is reversed. The erasing magnetic head can be diverted to a digital audio tape recorder (FIG. 7) having a configuration to be arranged,
Accordingly, the usability of the erasing magnetic head can be improved. According to the above construction, by providing the auxiliary magnetic head for erasing the area symmetrical to the time code track with respect to the track center to the magnetic head for erasing, the time code signal is completely erased and controlled even when the reverse is made. The signal can be recorded so that the audio signal can be correctly reproduced even when reversed.

In the above embodiment, the case of the format forming 28 recording tracks in the longitudinal direction of the magnetic tape of 1/2 inch width was described, but the present invention is not limited to this, and 1/2 inch. In the case of a format that forms 52 recording tracks in the longitudinal direction of the width of the magnetic tape,
In the case of a format that forms 12 recording tracks in the longitudinal direction of a 1/4 inch wide magnetic tape, further 1/4
The invention can be widely applied to the case of a format in which 20 recording tracks are formed in the longitudinal direction of an inch-width magnetic tape.

[0026]

As described above, according to the present invention, the erasing magnetic head erases the recording track for recording the analog signal and also erases the area symmetrical to the recording track of the analog signal with respect to the tape center. As a result, the recording track for recording the analog signal can be erased even when the tape is reversed, and thus a tape recorder capable of correctly reproducing the audio signal can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing the structure of a magnetic head of a tape recorder according to an embodiment of the present invention.

FIG. 2 is a front view showing the erasing magnetic head.

FIG. 3 is a schematic diagram showing the structure of a recording track.

FIG. 4 is a schematic diagram used to explain an inverse stroke.

FIG. 5 is a schematic diagram for explaining the erase recording operation.

FIG. 6 is a sectional view showing a mounting mechanism of the magnetic head.

FIG. 7 is a sectional view showing a modification thereof.

FIG. 8 is a front view showing an erasing magnetic head when the base is arranged on the chassis side.

FIG. 9 is a front view showing an erasing magnetic head when the base is pulled back and arranged.

[Explanation of symbols]

1 ... Magnetic tape, 4A, 22 ... Magnetic head for erasing,
6, 42 ... Magnetic head for recording, 23, 44 ... Magnetic head for reproducing, T ... Reel on winding side.

Claims (1)

[Claims] 1. A recording track for recording an analog signal and a recording track for recording a digital signal are formed in the longitudinal direction of a magnetic tape, and an audio signal is converted into a digital signal and recorded on the recording track for recording the digital signal. In a tape recorder, an erasing magnetic head for erasing the analog signal recording track and an area symmetrical to the analog signal recording track with respect to the tape center, and an area scanned by the erasing magnetic head And a magnetic recording head for forming a recording track for recording the analog signal and a recording head for forming the recording track for recording the digital signal.