JPS59108482A - Magnetic video recording and reproducing device - Google Patents

Abstract

PURPOSE:To obtain an excellent picture quality in the special reproduction at both 2-hour and 6-hour modes by providing two magnetic heads for normal recording and reproduction and also two magnetic heads exclusive use for special reproduction. CONSTITUTION:A magnetic head 1 for normal recording and reproduction and a magnetic head 6 for special reproduction having different azimuth angle from the head 1 are provided to one of head holders (not shown in figure) pressed and fixed onto an outer circumference at both ends of a diameter of a rotary drum 3, and a magnetic head 2 for normal recording and reproduction having different azimuth from the magnetic head 1 and a magnetic head 7 for special reproduction with equal azimuth to the magnetic head 2 are contained in other head holder at a distance. The track width of the magnetic heads 6, 7 for special reproduction is set larger than the track width of the magnetic heads 1, 2 for normal recording and reproduction, and the picture quality at the special reproduction is improved by using selectively the four magnetic heads.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording and reproducing apparatus, and particularly to a magnetic recording and reproducing apparatus equipped with a magnetic head that contributes to special reproduction (still image, slow motion, double speed reproduction) (D image quality improvement).

In a conventional magnetic recording/playback device, as shown in Fig. 1, two magnetic heads (1) with azimuths in different directions are attached to the outer periphery of a rotating drum (3). (4) Write a recording track on the top and use the same two magnetic heads (11 (21) for playback. Special playback such as still images, slow motion, double speed playback, and speed search can also be performed using the same two magnetic heads (11 (21). This was done using a magnetic head (1) (21).

In the conventional magnetic recording/playback device, two different azimuths are used.
Figure 2 shows the tape pattern recorded on the magnetic tape (4) by the magnetic heads (11, (21).
A2 A3... is the tape pattern recorded by the magnetic head (1), B, B2B5... is the tape pattern recorded by the magnetic head (2).
) is the tape pattern recorded. This also applies to other drawings. During reproduction, the two magnetic heads (1) and (21) each trace the recorded tape pattern with the magnetic heads of the same azimuth,
It is detected as a reproduction signal, and at that time, one frame of image information is recorded or reproduced by one set of two tracks A18 in FIG.

Next, special playback will be explained, but for still images, slow motion, double speed playback, and speed search, the magnetic head (1), (
21 are magnetized tracks A, B, , A, B2, . A
,B.

... Trace the top alternately. First, conventional still image reproduction will be explained using FIG. 8 and FIG. 4. In this case, as shown in Fig. 8, the magnetic tape (4) is stopped, but the magnetic head is moving as usual, so the trajectory C, which diagonally straddles tracks A and B1, Both magnetic heads (1) (2+ is traced. Magnetic head 1)
) Since +21 causes azimuth loss, it can only reproduce signals from tracks magnetized at the same azimuth angle.
The magnetic head (2) alternately reproduces the BL signals on the rack B1), and one still image is obtained.

The output waveform at that time is as shown in FIG.

Note that the arrow space (d) indicates one field, and e indicates the range of the output waveform corresponding to the locus (cl).

Further, when the playback output is from 1 to -1, it indicates that the output is equivalent to the normal playback output. This is common to all output waveform diagrams that appear later. The positions where the output of points (a), (b), and (c) in the figure become small are the positions that indicate the beginning of tracing of magnetic head 1) and the end of tracing of magnetic head (2), This position is prone to noise), which causes noise to appear at the top and bottom of the TV screen, and also because there is a slight time lag between the image information of track A and track B1. When the tracks AIB and AIB are played back alternately, there is a drawback that in fast-moving pictures, a portion of the screen may be smeared or doubled.

Furthermore, in the case of conventional slow motion playback, generally, by intermittent feeding of the tape, still images and normal playback images are alternately performed and a combination thereof is performed. At that time, when playing still images, the magnetic heads (]), (2) are used for tracks A, B, etc., as described above.

Because the head travels diagonally across A2B, , A, B, etc., the playback output from the magnetic head becomes small, as in the case of still image playback described above. Moreover, it has the disadvantage that it generates noise, deteriorates the image quality (S/N), and reproduces images with blurry or unnatural movement depending on the image.

Next, conventional double speed playback will be explained using FIGS. 5 and 6. In this case, as shown in FIG. 5, the magnetic head (1) moves to draw trajectories (5a) and (5c), and the magnetic head (2) moves to draw trajectories (5b) and (5d). In this case as well, the magnetic head (1) reproduces only the trace portions of tracks A and -A of the same azimuth among the loci (5a) and (5c), and the magnetic head +21 Since only the trace portions of tracks B2 and B4 are reproduced, when the magnetic head (1) and (2) pass through the boundary between tracks with different azimuths, the points (-4 (E) and (E)) in Figure 6 indicating the reproduction output are When the playback output is small, noise is likely to occur.Also, as shown in Figure 5, the playback order is A□・B2・A,・B4... During recording, there is a time difference of 8 fields between track A1 and track B2, whereas track B2 and track A3 are adjacent tracks with a time difference of 1 field. Therefore, the movement of the image during double-speed playback from track A1 to track B! is fast, and the movement of the image during double-speed playback from track B2 to track A3 is the same as normal playback.In this way, the movement of the image during double-speed playback from track A1 to track B! It also had the disadvantage that sometimes the movements were unnatural.

These defects that occur during special playback are caused by the special playback, which uses two magnetic heads (1) (21) that are used for normal recording and playback, and whose trajectory is different from normal. It is something.

These defects are caused by the recording tracks A1+B1+A2, B2+A3+ shown in FIGS. 1 to 6.
The same problem occurs in the 6-hour mode in which the width of Bl... is reduced to one-eighth so that eight times the time can be recorded, and in this case, naturally, the locus will be slightly different. Note that the 2-hour mode is when the track width is not reduced to one-third of the 6-hour mode, which is 8 times the width.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and by providing two magnetic heads exclusively for special reproduction in addition to the two magnetic heads for normal recording and reproduction. It is an object of the present invention to provide a magnetic recording and reproducing device capable of obtaining clear image quality without noise in special reproduction in both time and 6-hour modes.

An embodiment of the present invention will be described below with reference to the drawings. 7th
In the figure, a pair of head holders (not shown) are bonded and fixed to the outer periphery of the rotating drum (3) at both ends of its diameter. Inside one of the head holders are a magnetic head (1) for normal recording and playback, and a magnetic head (6) for special playback with a different azimuth from the magnetic head (1). , a normal magnetic head (2) for recording/reproduction whose azimuth is different from that of the magnetic head (1), and a magnetic head (7) for special reproduction whose azimuth is the same as that of the magnetic head (2), with a certain distance between them. It is contained. Note that the magnetic head 6) and the magnetic head 7 have the same azimuth.

At that time, the track width of the magnetic head for special reproduction (6) (7) should be larger than the track width of the normal recording/reproducing magnetic head (11 (21). How to select the size will be explained in the operation explanation below. However, both magnetic heads (
It is desirable that the track widths of 61(7) are equal.

This invention attempts to improve the image quality during special playback by selectively using the four magnetic heads (1) +21 (61 (7)) installed as described above depending on the purpose of use. The operation of this embodiment is divided into 2 o'clock mode and 6 hour mode, and is shown in Figs. 8 to 19.
This will be explained using figures.

(1) In the case of 2-hour mode In addition, in the 2-hour mode, guard bands G, -G2, G3,
This will be explained using a tape pattern with...

(1-1) Still image reproduction will be explained using FIGS. 8 to 10. In this case, as shown in Figure 8, a normal magnetic head (2) is used to
) recorded on track B, magnetic head (2)
Magnetic head for special reproduction with azimuth in the same direction (a)
(7) alternately trace, and both magnetic heads (6)
(7) In both cases, the signal from track Bl is detected. Therefore, in this embodiment, unlike the conventional still image obtained by reproducing two frames, a still image obtained by reproducing only one frame can be obtained. You can obtain still images with absolutely no blur.

Next, as shown in Fig. 8, align the locus (C2) traced by the magnetic heads (6) and (7) with the center of track B1. moves on the diagonal line (x) of track B1, the maximum reproduction output waveform can be obtained for the track width of the magnetic head (61 (7)) at that time as shown in FIG. 9. Since the track widths of both magnetic heads (6) and (7) are equal, the same reproduced output waveform can be obtained from both as shown in the figure.

Also, since the recording direction of track B on the magnetic tape (4) and the tracing direction of the magnetic heads (6) and (7) are different, in order to obtain an output equivalent to the normal playback output from track B, are magnetic heads (6) (7) for special playback.
) needs to be larger than the track width of track B, that is, the track width of the normal recording/reproducing magnetic head (1) +21. However, if you make the sweetness too large,
Tracks B with the same azimuth are adjacent by one space. -Bs
(not shown), there is a possibility that the output therefrom will appear as noise in a still image. Therefore, the track width of the magnetic head for special playback (6) (7) is the same as that of adjacent tracks B of the same azimuth separated by one space.
It is necessary to keep it to a level that does not affect o or B. If the track width is smaller than this, a noise-free still image can be obtained. The reproduction output closest to normal reproduction in this range is as shown in FIG.

Furthermore, if the track width of the special reproduction magnetic head (6) (7) is equivalent to the track width of the normal magnetic head (1) (21), then at least half the maximum output can be obtained. Still, it is possible to play still images without noise.

As described above, according to the present invention, it is possible to obtain clear still images that are easy to view and free from noise and blur.

(1-2) Slow motion reproduction will be explained using FIGS. 11 to 13. In this case, magnetic tape (4
), the special playback magnetic heads (6) and (7) alternately operate the previous stage still image playback and normal playback to produce noise-free slow motion playback.

FIG. 11 is a diagram showing the relationship between the amount of movement of the magnetic tape (4) and time in the case of 1/8 slow motion in terms of the number of tracks and fields. First, the magnetic tape (4) is moved at the normal playback speed for a time corresponding to two fields from the amount of movement 0, and is moved two tracks.

Next, the movement of the magnetic tape is stopped, and the still image of the previous stage (1-1) is reproduced for a time corresponding to four fields.

Next, the magnetic tape (4) is moved at the normal playback speed from the 6th field, and normal playback is performed up to the 8th field, that is, the time period of 2 fields. By repeating this operation, the magnetic tape (4) moves 6 tracks in the time of 6 fields in normal playback, but it moves only 2 tracks in the time of 6 fields, so it moves 8 tracks. one part
This means that slow motion playback can be realized.

Similarly, the still image playback time can be changed to 6.8.10...field toss lever, 1/4, 115, 1/6...slow motion, and multiples of slow motion can be played continuously. It is also possible to change it.

Slow-motion playback like Kono is possible by combining normal playback and still image playback, so slow-motion playback can be performed without noise.

Next, the movement of the special reproduction magnetic head <6) (7) used for slow motion reproduction on the magnetic tape (4) will be explained with reference to FIG. In the figure, (8) and (9) are the positions of the magnetic head for special reproduction (6) and (7) which started tracing the tracks B and B2, and the trace width is shown for the case of the magnetic head (6). (10Qυ is the special reproduction magnetic head 6 which has finished tracing tracks B1 and B2) (7) The trace width is for the magnetic head 7). a303 is a loose trajectory of the magnetic head (6) on tracks B1 and B2 during still image reproduction, a→(g) is a trace trajectory of the magnetic head (7) on tracks B1 and B2 during still image reproduction, OQ is the loose locus of the magnetic head (6) during normal playback, αη is the trace locus of the magnetic head (7) during normal playback, OQ is the moving direction of the magnetic tape (4) during normal playback, (X+) (X2) indicates the diagonal of tracks B, , B,.

By the way, in still image playback, the center of the special playback magnetic head (61 (7) is located at the diagonal line (X
, )(x2) If k is moved, the maximum reproduction output waveform can be obtained for the track width of the magnetic head (a) (7) at that time, as already stated in the previous section (1-1). It is shi. At that time, both magnetic heads (6) and (7) were assumed to be at the same height and have the same trace locus.

If you switch to normal playback in this state, the tracing direction of the magnetic head (6) (7) will be the same as the magnetic tape (4).
Since the recording direction is the same as the recording direction of the track Bt, the magnetic head 6) first runs centered on the boundary between the track Bt and the guard band G2, and then the magnetic head (7) runs the guard punt G, and then the track B! Both magnetic heads (6) and (7) must travel centered on the boundary between both magnetic heads (6)' (
On tracks B1 and B2, which are the same as the azimuth in 7), only one side is traced, so the special playback magnetic head (
5) If the track width in (6) is the same as the track width in the normal recording/reproducing magnetic head (1) +21, only half the signal of the maximum playback output will be detected, resulting in a decrease in image quality and the possibility of noise generation. It becomes sexual gas. Therefore, the track width of the magnetic head (6) (7) for special playback is determined by the track width recorded on the magnetic tape (4) (Bl, B2, B3,
), make the track width wider than the magnetic heads (1) (21) for normal recording/reproduction.Furthermore, move the centers of both magnetic heads (6) (7) slightly to opposite sides. Shift both magnetic heads (a) so that there is a step (7)
) head installation requires a slight change in height.

The trace loci of the magnetic heads (6) (7) thus provided are as shown in FIG. 12, a to aη, and the reproduced output waveform at that time is as shown in FIG. To explain the flow at this time, first, the magnetic head (6) at position N(8) is traced around the locus (2) to position 00, and then the output waveform (18) shown in Fig. 18 is obtained. The magnetic head (7), which has come to position (8), is traced at position 001 centering on the locus α fathom, and an output waveform Q9) is obtained. In this way, still image reproduction is performed, and when the next transition is made to normal reproduction between fields 00 and 2 or fields 6 and 8 in FIG. 11, the magnetic head (6)
is traced from position (8) centering on the locus OIS, and an output waveform - is obtained. Next, the magnetic head (7) comes to position (9), and from there it is traced around the locus Qη to position Q0, and an output waveform (2B) is obtained. In this way, normal reproduction is performed, and then Fields 2 to 6 in Figure 11
When the field or 8th to 12th field still image playback is resumed, the magnetic head (6) moves to position (9).
The magnetic head 7) that has come to position (9) is then traced around locus α3 to position Qυ, and the output waveform □□□ is obtained.Then, the magnetic head 7) that has come to position (9) is traced around locus 06 to position Qη, and the output waveform □□□ is obtained. By repeating this process, slow motion playback is performed. At this time, the trajectory U Q3 Q → 0G of the magnetic head (61 (7) is track B,
・Since it runs near the diagonal line (x,) (x2) of B2 and along the diagonal line (xt) (X2), it can be stopped if the track width of the magnetic head (6) (7) is appropriately selected. Maximum playback output can be obtained for image playback.

In addition, during normal playback, the magnetic head (6) (7)
move near the center of tracks B1 and B2, respectively, so
When both magnetic heads (61(7)) are at the same height, a larger reproduced output waveform can be obtained.

(1-8) In the case of double-speed playback In this case as well, a magnetic head (61(7)) for special playback is used, and the trace locus of the magnetic head (61(7) at that time is as shown in Fig. 14). The playback output waveform at that time is the first
It will look like Figure 5. In the figure, (24) and (281) are the trajectories traced by the magnetic head (6), and (21η is the magnetic head 7).As is clear from the figure, the tracks to be reproduced are tracks B1, B2, and B3. In this order, the magnetic heads (6) and (7) used are both azimuth.

In order to do this, it is necessary to detect and reproduce multiple signals from tracks of the same azimuth recorded at equal intervals every other track on the magnetic tape (4). This eliminates the unnatural movements caused by slow movements, resulting in a smooth screen, and the magnetic head (
The center of the trace trajectory (material) (c) in 6) becomes closer to the playback track B1, B3...Bt+t as it approaches the end of the trace.
n, and since the center of the trace locus of the magnetic head (7) (271) starts from the center of the playback tracks B2, B4...B10 at the beginning of tracing, the noise is lower than in the past. It is becoming less likely to occur.

(1-4) In the case of speed search In this case as well, speed searches are performed in both forward and reverse directions using magnetic heads (6) and (7) for special playback, so in the case of (1+1) double speed playback mentioned above Similarly, the tracks to be played are lined up at equal intervals, and the magnetic head (6)
Tracks B1, B2...B with the same azimuth as (y)
n...te, so you can get a smooth screen.

However, in either of the magnetic heads (6) and (7), the speed search is performed by tracing several tracks in one trace locus, so the generation of noise cannot be avoided.

(2) In the case of the 6-hour mode Even in the 6-hour mode, which has a recording time 98 times longer than the 2-hour mode, and in which the width of one track on the magnetic tape (4) is reduced to one-eighth, Magnetic head for recording and reproduction 1) (2+ and magnetic head for special reproduction (a)
Two or all four of the four magnetic heads shown in (y) are selectively used to perform pre- and noise-free special reproduction of natural motion.

Note that in this 6-hour mode, the track width on the magnetic tape (4) is narrower than in the 2-hour mode.
It is necessary to record as much information as possible on one track, so it is common practice not to provide a guard band. Therefore, the case without a guard band will be explained here as well.

(2-1) Still image reproduction will be explained using FIG. 16. In the figure, Q~ indicates the locus traced by both magnetic heads (61 (7)) during still image playback. In this case as well, as in the case of the 2-hour mode, the magnetic head (6) ( 7), and in operation, as in the 2-hour mode, the two magnetic heads (6) and (7) trace the same location and reproduce the same video signal, so the screen does not blur at all. Also, the recording direction of track B on the magnetic head (4),
Although the tracing direction of the magnetic head (61 (7)) is different, the track width of the magnetic head (6) (7) is wider than that of the magnetic head (1) that recorded the track BI, so the recording Most of the information provided is regenerated,
Therefore, generation of noise is prevented. In this way, even in still image playback in 6-hour mode.

It is possible to perform image preview and noise-free still image playback.

(2-2) Slow-motion playback The slow-motion playback in this 6-hour mode is similar to the slow-motion playback in the 2-hour mode.
) intermittently and repeating still image playback and normal playback alternately.

However, during normal playback, magnetic heads (1) (21) for normal recording and playback are used (different from normal playback during slow motion playback in 2-hour mode). During still image playback, magnetic heads (1) (21) are used in the above-mentioned 6-hour mode. When playing still images (2-x)
& [2 o'clock iJ1 mode slow motion playback (1-
Similar to 2), a magnetic head for special reproduction (fil (7)
use. This will be explained using FIGS. 16 and 17 showing the trace locus of the magnetic head, and FIG. 8 showing the reproduced output waveform at that time.

In the figure, m9) (30) is the magnetic head (1) (2+) for normal recording/reproduction, each of which is a locus traced on the magnetic tape (4), and Ov is the magnetic head (6) (7).
is the trajectory to be traced. This slow-motion playback in the 6-hour mode has the same operation and function as the slow-motion playback (1-2) in the 2-hour mode, except during normal playback, and does not change. Playback magnetic head 6) (7) to track B
1 information is detected and the still image is reproduced. This is the general rule υ described in the case of still image reproduction (2-1) above.

Next, when normal reproduction is started, as shown in FIG. 17@), the magnetic head (1) for normal recording and reproduction traces the track Bl of the same azimuth to detect information.

Next, as shown in the 17th section (b), information is detected by tracing the same azimuth track A2 with a magnetic spatula (21) for normal recording and playback. In this normal playback,
The same magnetic head (1) that recorded track Bl' A2 on the magnetic tape (4) traces and reproduces it with +21, so as shown in Fig. 17 (10), the trace trajectory (29
) (3110 completely matches track B1N, so naturally no noise occurs.Next, the process moves to the still image playback shown in FIG. 17(C), but this still image playback is similar to that shown in FIG. It is exactly the same as still image playback.At this time,
Looking at the order of the playback tracks, tracks B1, B,...
B1, A2, B2, B2, B2, A3, B, etc. Since the tracks are played in order without skipping tracks, no unnatural movements appear on the screen. In this way, by using four magnetic heads, noise can also be reduced.
It is possible to perform slow motion playback without any unnatural movements. As explained in the 2-hour mode, it goes without saying that by changing the number of fields for still image playback, you can achieve a fraction of the slow motion F) live or variable speed slow motion playback. Nor.

(2-8) In the case of double-speed playback In this case as well, as in the case of the 2-hour mode, use the special playback magnetic heads (6) and (7).
) (The trace locus of 73 is as shown in Fig. 19 υ, and the reproduced output waveform at this time is as shown in Fig. 20. 03) shows the trace locus of the center of the head (6), and 03) shows the trace locus of the center of the magnetic head (7) on track B3. It is clear from the figure that the tracks to be reproduced are in the order B1, B3, B, Bo, Bll, etc.9, and the magnetic heads (6) and (7) used are of both azimuths, so The fxp detects and reproduces multiple signals from tracks of the same azimuth recorded at equal intervals every eight on the magnetic tape (4), and as in the case of the 2-hour mode, the conventional screen The movement is faster, and the unnatural movement of slow and sluggish movement is eliminated, resulting in a smooth screen. Moreover, the trace locus of the center of the magnetic head (6) (7) (32 (331) runs so as to cross near the center of the tracks B1, B3, and B on which signals are being detected. Magnetic head (6) (7)
The track width is wider than that of a normal recording/reproducing magnetic head that records tracks B1, B2, B3, etc. 1) (Since it is wider than 21, sufficient output can be obtained as shown in Figure 20, and there is less noise than before. The occurrence of is suppressed.

(2-4) In the case of speed search In this case, in the case of speed search in 2-hour mode (1
-4), speed searches in both forward and reverse directions are performed using magnetic heads (6) and (7) for special reproduction.
Tracks B, ・B2...B with the same azimuth as (7)
The track B passes through n... to obtain a playback signal.
It is inevitable that the signals generated when tracing the tracks AI' A2...An with different azimuths between 1.Bn... are twisted.

As described above, in the magnetic recording and reproducing apparatus of the present invention, in addition to the conventional two magnetic heads for normal recording and reproduction with different azimuths, two magnetic heads for special reproduction that have the same azimuth as one of them are used. By arranging the magnetic heads in close proximity to the magnetic heads for normal recording and reproduction, and selectively using the four magnetic heads described above, it is possible to obtain special reproduction images without noise play and unnatural movement. be.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the arrangement of the magnetic head on the rotating drum of a conventional magnetic recording/reproducing device, Fig. 2 is a diagram of the magnetization pattern of the magnetic tape when recording with the conventional magnetic head, and Fig. 8 is a plan view showing the arrangement of the magnetic head on the rotating drum of a conventional magnetic recording/reproducing device. FIG. 4 is a diagram showing the trajectory of the magnetic head in still image reproduction when a recording track is traced by the magnetic head; FIG. 4 is a diagram showing the reproduction output from the magnetic head in FIG. 8;
FIG. 6 is a diagram showing the trajectory of the magnetic head during double-speed reproduction using a conventional magnetic head, and FIG. 6 is a diagram showing the reproduction output from the magnetic head in FIG. 5. FIG. 7 is a plan view showing the arrangement of the magnetic heads on the rotating drum and the azimuth direction of the magnetic head gap as seen from the tape sliding surface in the magnetic recording/reproducing apparatus according to the present invention;
The figure shows the trajectory of the magnetic head during still image playback in the 2-hour mode according to the present invention, and FIG. 9 shows the playback output from the magnetic head when the track width of the magnetic head and the recording track width in FIG. 8 are the same. Figures 10 and 11 are diagrams showing reproduction output from the magnetic head when the track width of the magnetic head in Figure 8 is larger than the recording track width.
The figure shows the relationship between the amount of tape movement and time in the case of 1/8 slow motion playback. Figure 12 shows the relationship between the tape movement amount and time in the case of 1/8 slow motion playback. FIG. 18 is a diagram showing the magnetic head trajectory when the tape is stopped and when the tape is moving. FIG. 18 is a diagram showing the reproduction output from the magnetic head in FIG. 12. FIG. FIG. 15 is a diagram showing the reproduction output from the magnetic head in FIG.
A) (B) and (C) are diagrams showing the trajectory of the magnetic head in slow motion playback in 6-hour mode, Figure 18 is a diagram showing the reproduction output from the magnetic head in Figures 16 and 17, and Figure 19. 20 is a diagram showing the trajectory of the magnetic head during double-speed reproduction in the 6-hour mode, and FIG. 20 is a diagram showing the reproduction output of the magnetic head in FIG. 19. In the figure, (1) is the first magnetic head for normal recording/reproduction, (2) is the second magnetic head for normal recording/reproduction, and (3) is the second magnetic head for normal recording/reproduction.
(6) is an eighth magnetic head for special reproduction, and (7) is a fourth magnetic head for special reproduction. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Agent Makoto Kuzuno - Figure 1 Figure 3 Figure 4 Figure 5 Figure 7 Figure 8 Figure 12 Figure 13 Figure 14 Figure 16 Figure 17 (a)
(D) Figure 18 Figure 19 Akira 2Qli

Claims (5)

[Claims] (1) In a magnetic recording/reproduction device that performs recording and reproduction using first and second magnetic heads having different azimuths, which are provided at opposite positions on the outer periphery of a rotating drum, the magnetic recording head has the same azimuth as the first magnetic head. A magnetic recording/reproducing apparatus characterized in that an eighth magnetic head is disposed close to the magnetic head, and a fourth magnetic head having the same azimuth as the first magnetic head is disposed close to the second magnetic head. (2) The magnetic recording/reproducing apparatus according to claim 1, wherein the track widths of the eighth and fourth magnetic heads are equal. (3) The track width of the eighth and fourth magnetic heads is larger than the track width of the first and second magnetic heads. Magnetic recording and playback device. (4) The first and eighth magnetic heads are also connected to the second magnetic head.
9. The magnetic recording and reproducing apparatus according to claim 1, wherein the magnetic head and the fourth magnetic head are housed in the same holder with a certain distance between them. (5) The magnetic recording and reproducing apparatus according to any one of claims 1 to 4, wherein the eighth and fourth magnetic heads are magnetic heads for reproduction only.