JPS62241104A - Rotary head type magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To apply dubbing at one set of device while using two tapes by dividing a cylinder peripheral part into two and providing independent tape guides. CONSTITUTION:The peripheral part of a helical scan cylinder 12 is divided into two and independent tape guides are provided. The recording or reproduction is applied to/from magnetic tapes 11a, 11b wound obliquely on the cylinder 12 along the guides and two tapes are used by one set of the recording and reproducing device to execute dubbing simply.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a rotating head type magnetic recording and reproducing device, which uses a rotating head to record and reproduce information signals on tracks inclined in the longitudinal direction of a magnetic tape. The present invention relates to a head type magnetic recording/reproducing device.

Conventional technology Conventional rotating head type digital audio signal recording and reproducing equipment (
RD AT) and rotating head type video signal recording and reproducing devices wrap a single magnetic tape around a rotating cylinder and scan the magnetic tape using multiple rotating heads attached to the rotating cylinder to record and reproduce signals. ing.

Problems to be Solved by the Invention In the above-mentioned conventional apparatus, recording on one magnetic tape (
When the recording (or reproduction) is completed, the magnetic tape must be replaced to continue recording (or reproduction), and when dubbing, two devices must be prepared.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a rotary head type magnetic recording/reproducing device that solves the above problems by winding a plurality of magnetic tapes around a cylinder.

Means for Solving the Problems In the present invention, the outer periphery of the fixed portion of the cylinder is divided into caps, each of which is provided with an independent tape guide means.

Separate magnetic tapes are wound along each of the tape guide means, and information signals are recorded and reproduced using magnetic heads.

In the present invention, two magnetic tapes are wound around a cylinder, and by running these two magnetic tapes independently and sequentially, the recording (or playback) time can be doubled compared to the conventional method. Dubbing can be done by running two magnetic tapes at the same time.

Example FIG. 1 shows a plan view of an embodiment of the device of the present invention.

In the figure, lQa and 10b each represent a tape cassette.

Magnetic tapes 11a and 11b pulled out from tape cassettes 10a and 1ob, respectively, are wound around a cylinder 12. Each of the magnetic tapes 11a and 11b is connected to a reel motor 1.
3a and 14a, 13b and 14b, respectively, and the capstans 15a and 15b and the pinch roller 1
Stable running is ensured by 6a and 16b. 17a
, 17b are capstan sweaters that drive the capstans 15a and 15b, respectively.

The cylinder 12 has a structure shown in FIG. cylinder 12
As shown in the left side view of FIG. 2(A), the cylinder is comprised of a rotating cylinder 20, a fixed cylinder 21, and a cylinder motor 22 for driving the rotating cylinder 20. As shown in the plan view of FIG. 952(B), magnetic heads 23a, 23b, 23c, and 23d are attached to the rotating cylinder 20 at every rotation angle of 90 degrees. Also, Figure 2 (C
), the rotary head 23b is mounted by being displaced from the magnetic head 23a by 1/2 track pitch toward the upper fixed cylinder 21 side in the axial direction, as will be described later.

The axial mounting positions of the magnetic heads 23a and 23c are the same, and in FIG. 2(A), the magnetic head 23d is displaced from the magnetic head 23a by 1/2 track pitch toward the upper fixed cylinder 21 in the axial direction. It is installed.

On the outer periphery of the fixed cylinder 21, tape leads 24a and 24b having a rotation angle range of 90 degrees or more are provided facing each other. The magnetic tape 11a is guided by the tape lead 24a, and the magnetic tape 11b is guided by the tape lead 24b.

A case where the above device is used as a rotary head type digital audio signal recording and reproducing device will be explained.

First, the after-monitoring operation for the magnetic tape lla will be explained. In this case, the magnetic heads 23a, 23
c as shown in FIG. 3, tracks t1 to t6. ... is recorded. Here, the magnetic tape 11a runs in the direction of arrow C, and the magnetic head 23a and the like scan in the direction of arrow C. Figure 4 (A).

While the magnetic heads 23a and 23c are scanning as shown in FIG. 4(C), the magnetic heads 23b and 23d are scanning as shown in FIGS. 4(B) and 4(D). The audio signal is time-compressed when it is encoded, and is time-expanded when it is played back and decoded, so there is no problem.

and Korote, magnetic head y do 23a, 23c,! =23b.

23d are at the same position in the axial direction, immediately after the magnetic head 23a records track t3, the magnetic head 2
3b scans and covers the position shown by the broken line in FIG. However, the magnetic head 23b.

23d each has a 1/2 track pitch (=
P/2), the magnetic head 23b accurately scans the track t3 recorded by the magnetic head 23a.

Tracks t1 to t6+... sequentially recorded by the magnetic heads 23a and 23c are transferred to the magnetic head 23b immediately after recording.
, 23d, decoded and D/A converted, and output as an analog audio signal. During this after-monitoring operation, the rotary transformer installed between the rotating cylinder 20 and the fixed cylinder 21
Each time 0 rotates 90 degrees, the magnetic heads 23a, 23b, 23c, and 23d are sequentially selected without overlapping in time.

In this manner, recording is performed on the magnetic head 11a while performing after-monitoring, and when the recording is completed 1'', the running of the magnetic tape 11a is stopped, and the running of the magnetic tape 11b is started, and the magnetic tape 11b is continuously recorded. Recording is performed. In this case as well, after-monitoring is performed using exactly the same operation.

Furthermore, it is also possible to reproduce the magnetic tape 11b continuously after reproducing the magnetic tape 11a in the same manner.

Next, a dubbing operation from the magnetic tape 11a to the magnetic tape 11b will be explained. Recorded tracks t+, tz, t3. of the magnetic tape 11a. ta.

... is shown in Fig. 5 (A) by magnetic head 238.23G.
, (C). The played tracks t+, t2. t3. t+, . . . each signal is decoded while the rotating cylinder 20 rotates 450 degrees,
Further encoded, tracks t+, t2 . t3. t
4, . . . are recorded sequentially. In this case as well, the rotary transformer is switched as shown in FIG. 5(E) every time the rotating cylinder 20 rotates 90 degrees, and the magnetic head 23
a=23d are selected sequentially without overlapping in the IT space.

When simultaneous recording is performed on the magnetic tapes 11a and 11b, the magnetic heads 23a and 23c are used to record data on the magnetic tapes 11a and 11b as shown in FIG.
, (C), the tracks tl, t2, . . . are recorded on the magnetic tape 11a at the timings shown in FIG. 6(B).
, tracks i:+, t2 . ... is recorded. The rotary transformer in this case is switched as shown in FIG. 6(E). Note that the sources of the signals recorded on each of the magnetic heads 11a and 11b may be the same or different.

Next, the track tl of each of the magnetic tapes 11a and 11b is
, t2, . . ., the editing operation will be described assuming that control channels such as track numbers and digital audio signals of the first and second channels are recorded respectively. In this case, as shown in FIG. 7, control channel C is recorded immediately after the start of scanning each track, followed by first channel CH1, and then second channel CH2.

For example, track 1 of the magnetic tape 11a. ．． 12°...
control channel C and first channel C, respectively.
After the recording of H1 is completed, this first channel CHI is monitored and a signal from another source is recorded on the second channel of the magnetic tape 11a. In this case, the magnetic head 23a,
The respective control channels C and first channel CHI of tracks t+, t2, . The reproduced signal of the first channel CH1 is decoded, D/A converted, and then monitored. Audio from another source corresponding to the monitor audio on the first channel is A/D converted and encoded into a digital audio signal on the second channel. This second channel signal is transmitted to the magnetic head 2.
3b and 23d respectively record the recorded track t3 of the magnetic tape 11a at the timing shown in FIGS. 8(B) and 8(D).
t4. ... is recorded at the position of each second channel CH2. Note that the magnetic heads 23b and 236 respectively record on tracks t3. t...
This is only when scanning the respective second channels CH2, and the control track C and the first channel CH1 are not erased.

In this recording, the first channel C of track t1
The audio corresponding to the audio of H1 is recorded on the second channel CH2 of track t3.

Each track t,, jz, . . . of the magnetic tape 11a recorded in this way is a magnetic head 23a.

23b, respectively, at the timings shown in FIGS. 9(A) and 9(C). The control signal of each reproduced track and the signal of the first channel are transmitted by the rotary cylinder 20 to the
The time delay of the 50 degrees rotated stage is performed, and the time is aligned with the signal of the second channel 11. Thereafter, the first and second channel signals are each decoded and digitally added, and then D/A converted and monitored. The signal obtained by adding the first and second channels is defined as a third channel. The audio from another source corresponding to the monitor audio on the first and second channels is A/D converted and encoded into the fourth channel. channel digital audio signal.

The reproduced one roll signal, the third channel signal, and the fourth channel signal are sent to the magnetic head 23b,
236, the tracks t+, j2 . ...
recorded separately. At this time, the control signal is
As shown in the figure, it is recorded on the control channel ↑l channel C,
3rd chi 1! Channel I5 is recorded on the first channel CH1, and the fourth channel signal is recorded on the second channel CH1! l channel C1
-12 is recorded.

The reason why the signals of J3, 3rd channel and 4th channel are recorded separately into 1st channel t7 channel CH1 and 2nd channel 17 channel CH2 is because there is a possibility of editing the 4th channel signal. .

By repeating the above operations, it is possible to perform infinite overdubbing. Furthermore, since there is almost no signal deterioration during dubbing when recording and reproducing digital audio signals, it is suitable for multiplex recording.

In this case, after the magnetic tape 11a runs, the magnetic tape 11
By running the magnetic tapes 11a and 11b
It is possible to perform continuous recording (or playback) of
It takes twice as long as before, and it takes less than an hour to replace the magnetic tape.

Furthermore, it is possible to perform dubbing using one device while simultaneously running the magnetic tapes 11a and 11b, and it is also possible to perform editing between the magnetic tapes 118 and 11b.

Furthermore, the cylinder 12 and the device housing etc. are connected to the magnetic tape 11.
Since it can be shared for the drive mechanisms of a and 11b, two
The cost of the device is lower compared to one in which two devices are operated synchronously.

Also, no matter what type of recording (or playback) J3 is, 1
The signals from each of the magnetic heads 23a to 23d can be transmitted without temporally overlapping using the rotary transformer, and there is no mutual interference of signals.

Effects of the Invention As described above, the rotary head type magnetic recording/reproducing device according to the present invention can perform recording or reproduction for twice the time of the conventional method by running two magnetic tapes wound around a cylinder separately. In addition, it is possible to run two magnetic tapes at the same time to perform simultaneous recording, dubbing, and editing between both magnetic tapes, and has features such as being cheaper than using two conventional devices. have.

[Brief explanation of drawings]

FIG. 1 is a plan view of an embodiment of the device of the present invention, FIG. 2 is a plan view and side view of an embodiment of the cylinder of the device of the present invention, and FIG.
FIG. 7 is a diagram schematically showing a recording track pattern of the apparatus of the present invention, and FIG. 4 is a diagram, respectively. FIG. 5, FIG. 6, FIG. 8, and FIG. 9 are diagrams for explaining each embodiment of the recording/reproducing timing of the magnetic head of the apparatus of the present invention. 11a, 11b...Magnetic tape, 12...Cylinder, 20...Rotating cylinder, 21...Fixed cylinder,
23a-23d...Magnetic head. Figure 1 @ Figure 2 Figure 3 -6 Figure 4 → Repair V -ノ

Claims (1)

[Claims] A rotary head type that uses a magnetic head attached to a rotating part of a cylinder to record and reproduce information signals on tracks inclined in the longitudinal direction of a magnetic tape wound around a fixed part of the cylinder. In a magnetic recording and reproducing device, the outer periphery of the fixed portion of the cylinder is divided into two parts, each of which is provided with an independent tape guide means, a separate magnetic tape is wound along each of the tape guide means, and the magnetic head is used. What is claimed is: 1. A rotary head type magnetic recording and reproducing device that records and reproduces information signals using a rotary head.