JPH0813115B2 - Video signal recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in the following order.

A Industrial field of use B Outline of the invention C Conventional technology D Problems to be solved by the invention E Means for solving the problems (FIG. 1, FIG. 4, FIG. 6 to FIG. 8 and FIG. Fig. 9, Fig. 10) F action (Fig. 1, Fig. 4, Fig. 6 to Fig. 8, Fig. 9,
Fig. 10) G Example (G1) Configuration of scanner (Figs. 1 to 5) (G2) Head operation in second traveling speed mode (Sixth)
(Fig. 9, Fig. 9) (G3) Head movement in the third traveling speed mode (7th)
(Fig. 10) (G4) Head operation in the first traveling speed mode (8th)
(G, FIG. 11) (G5) Other embodiments H Effect of the invention A Industrial field of application The present invention relates to a video signal recording / reproducing apparatus, and is suitable for application to, for example, a helical scan type video tape recorder (VTR). It is a thing.

B Outline of the invention In a video signal recording / reproducing apparatus in which a recording track having double azimuth is recorded / reproduced by a helical scan method, a cut-out point from a new recording pattern to an old recording pattern is completed at the time of ending continuous recording / editing on a recording medium. The recording track having the unerased portion of the old recording pattern formed at the seam portion of the position always has one of the first and second azimuth angles.
By selecting the timing of the operation end point of the magnetic head and the first and second flying erase heads, deterioration of the image quality of the reproduced image can be prevented in advance.

C Conventional Technology As a conventional helical scan system VTR, a system in which video information is recorded / reproduced on / from a magnetic tape by using a common rotary head while traveling the tape at a plurality of different tape speeds is used.

For example, as a VTR using a β type format, the first tape running speed (so-called β1 mode) is 40 [mm /
s], the second tape running speed (so-called βII mode) is 2
The recording / reproducing operation is performed in each of the three operation modes while the operator selects 0 [mm / s] and the third tape traveling speed (so-called βIII mode) of 13.3 [mm / s] as needed.
There is a VTR.

D. Problems to be solved by the invention When the video information is recorded and reproduced on the tape in the operation mode in which the tape traveling speed is different by using the common rotary head, the track width of the track formed on the magnetic tape and the track width Since the track angle when the tape is running differs for each operation mode, the cut-out point is set when the new recording pattern is continuously shot and edited (insert edit or assemble edit) over the old record pattern that has already been recorded. In the above, there is a possibility that a track portion which cannot be erased by the flying erase remains.

When a track with such an unerased part is created,
When a recording pattern composed of new video information is recorded on the recording track having the unerased portion, the old video information and the new video information are overlapped and recorded on one recording track, so that the recording track is recorded. For example, if frame-by-frame reproduction is performed, there is a possibility that a still image with poor image quality such as two images superimposed on each other may be reproduced.

The present invention has been made in consideration of the above points, and even when there is an unerased portion due to the flying erase head at the cutout point when performing continuous shooting editing, still playback like frame feed playback etc. The present invention intends to propose a video signal recording / reproducing apparatus which does not generate a superposed image having poor image quality.

E Means for Solving Problems The recording medium 6 has a plurality of traveling speed modes for traveling the recording medium 6 at different traveling speeds, and the recording medium 6 is recorded while traveling at the traveling speed corresponding to the designated traveling speed mode. In a helical scan type video signal recording / reproducing apparatus for recording video information by sequentially forming recording tracks having first and second azimuth angles different from each other on the medium 6, a first or second azimuth respectively. First and second magnetic heads 1A (2
A) and 1B (2B), and first and second flying erase heads 4A and 4B for erasing video information having a second or first azimuth degree, which are provided in common for each traveling speed mode. And a recording track having an unerased portion of the old recording pattern formed at the seam of the cut-out point position from the new recording pattern to the old recording pattern when the continuous recording and editing are finished on the recording medium 6. , The first and second magnetic heads 1A (2A) and 1B (2B) so that they always have one of the first and second azimuth angles.
And the first and second flying erase heads 4A, 4B
The timing at the end of the operation of is selected.

F action When a recording track is formed using the common first and second magnetic heads while the recording medium 6 is traveling at different traveling speeds, the track width of the recording track corresponds to the traveling speed of the recording medium 6. As the traveling speed of the recording medium increases, the track angle of the recording track becomes smaller as the traveling speed of the recording medium increases.

When a new recording pattern is continuously shot and edited with respect to the old recording pattern formed on the recording medium in this way,
The first and second flying erase heads 4A and 4B provided in common to all traveling speed modes have an unerasable unerased portion at the cutout point position from the new recording pattern to the old recording pattern. It causes a recording track.

According to the present invention, a recording track having an unerased portion of an old recording pattern formed at a seam portion at a cut-out point position from a new recording pattern to an old recording pattern when the continuous recording and editing on the recording medium 6 is finished. , So that it always has one of the first and second azimuth angles, the first and second magnetic heads 1A (2A) and 1B (2B)
And the first and second flying erase heads 4A, 4B
The timing at the end of the operation of is selected. Therefore, when the frame feed reproduction is performed, it is possible to always obtain a reproduced image of good image quality without being affected by the recording track having the unerased portion of the old recording pattern.

G Embodiment One embodiment of the present invention will be described in detail below with reference to the drawings.

(G1) Structure of scanner In FIG. 1, reference numeral 1 is a scanner, which is placed on the rotary drum 2.
A pair of main heads 1A and 1B with different azimuth angles at 180 ° opposite positions (this is called double azimuth)
1.25H for main heads 1A and 1B, respectively
The main head 1A and the sub-head 2A are integrally formed, and the main head 1A and the sub-head 2A are integrally formed with the main head 1A and the sub-head 2B having the same azimuth angle as the main head 1A and 1B. The head block H2 formed by integrating the main head 1B and the sub head 2B with respect to the head block H1 of the main head 1A and the sub head 2B is mounted at a position keeping an angular interval of about 180 °.

The flying erase head 4B for head B is located on the rotary drum 2 at a position delayed by 45 ° with respect to the head blocks H1 and H2 in the direction opposite to the rotation direction a of the rotary drum 2.
And Flying Erase Head 4A for A head is 180 °
It is located at a remote location.

Flying erase head for A head and B head
4A and 4B have azimuth angles different from each other, and the flying erase head 4A erases the video information recorded by the main head 1A by the azimuth angle opposite to that of the main head 1A and the sub head 2A. . Similarly, the flying erase head 4B for the B head has an azimuth angle opposite to that for the azimuth of the main head 1B and the sub head 2B, thus surely erasing the video information recorded by the main head 1B.

The magnetic tape 6 is wound around the rotary drum 2 over an angular range of 180 °, and the main heads 1A and 1B, or the subheads 2A and 2B, which are arranged at positions facing each other by 180 °, are sequentially alternated. It is possible to record recording tracks having different azimuth angles with a recording pattern that does not interpose a guard band.

By using the scanner 1 having such a configuration, the reproduction speed can be reproduced at a variable speed as required, and still images can be sequentially reproduced in the frame feed reproduction mode.
The tape traveling speed is set to the first to third traveling speed modes (βI
The so-called multifunctional VT that can record for a long time as needed by switching to three stages (βIII mode)
It is designed so that R can be realized.

Here, the flying erase heads 4A and 4B for the A head and the B head surely precede the corresponding main heads 1A and 1B when the tape running speed is switched to the first, second and third running speeds. It is positioned at the following height and phase positions so that the old recording pattern on the magnetic tape can be erased.

As shown in FIG. 3, the flying erase heads 4A and 4B have a head width W _ER for two track widths in the second traveling speed mode, from the lower ends of the main heads 1A and 1B to the lower ends of the flying erase heads 4A and 4B. The height H _ER of the main head 1A, 1B is set so as to cross the two adjacent tracks formed by the main heads 1A and 1B in the second traveling speed mode.

Actually, the head width of the main heads 1A and 1B is twice as large as that in the case of FIG. 3, but at the traveling speed of the magnetic tape 6 in the second traveling speed mode,
By alternately writing 1A and 1B alternately by a half track width, the width of the formed recording track becomes half that of the main heads 1A and 1B.

On the other hand, in the third traveling speed mode, the traveling speed of the magnetic tape 6 is 13.3 times that in the second traveling speed mode.
[Mm / s] / 20 [mm / s] ≒ 0.665 times lower,
Accordingly, the track width becomes 0.665 times narrower. Therefore, in the third traveling speed mode, as shown in FIG. 4, the flying erase heads 4A and 4B travel with the recording track width of three lines to erase the recorded information across four recording tracks. .

In the first traveling speed mode, the traveling speed of the magnetic tape 6 is 40 [mm / s] / 20 compared to the second traveling speed mode.
By increasing [mm / s] = 2 times, the track width is doubled accordingly. Therefore, in the first traveling speed mode, as shown in FIG. 2, the flying erase head 4
As A and 4B travel with the width of one recording track, the recording information is erased across the two recording tracks.

In FIG. 3, 1A1, 1A3, 1A5 ..., and 1B2,
1B4, 1B6, ..., The horizontal axis represents the phase position at the position where the main heads 1A and 1B start contacting the magnetic tape 6 each time it rotates (this is called the inrush point).
1, 4B2, 4A3 ... Represent the phase position and height of the flying erase heads 4A, 4B at this timing. In this embodiment, flying erase head 4A,
4B has its lower end position set to the height H _ER with reference to the lower ends of the corresponding main heads 1A and 1B, and this is shown on the vertical axis. The same applies to FIGS. 2 and 4.

Here, the phase that follows the recording tracks to the flying erase heads 4A and 4B with respect to the main heads 1A and 1B is selected to be 180 ° × 2 + 135 ° in the second traveling speed mode. In FIG. 3, the main heads 1A and 1B are sequentially recorded. The entry points 1A1, 1B2, 1A3, 1B4, 1A5 ...
The angle of rotation when the main heads 1A and 1B rotate from the respective entry points in the direction of the rotation direction a of the rotary drum 2 (Fig. 1) (consequently to the phase). ), The main heads 1A and 1B plunge into the recording track of the magnetic tape 6 from the reference position shown in FIG. 1 and are rotated by 180 ° (that is, the phase position of 180 ° × 1 in FIG. 3). ), The magnetic tape 6 is released from the recording track. After that, when it is further rotated 180 °, the main heads 1A, 1 at the rotational phase position 180 ° × 2
B enters the recording track again. Then, when it is rotated by 135 ° while scanning on the recording track, it reaches the positions of the flying erase heads 4A and 4B. Thus, it can be seen that the flying erase heads 4A and 4B are separated from the main heads 1A and 1B by a rotational phase of 180 ° × 2 + 135 ° = 495 °.

If this is expressed using the relationship with the recording pattern on the magnetic tape 6, as shown in FIG. 5, the head 1A is located at the position of the plunge point P0 of the scanning locus (and hence the recording track) PTA1 on the magnetic tape 6. At the timing of a certain state, the recording track
When the PTA1 is traced so as to rotate by 180 °, the exit point P1 of the recording track PTA1 is reached. This departure point P1 is
Spatial scan locus PTA2 until the main head 1A separates from the magnetic tape 6 and enters the entry point P4 of the next recording track PTA3.
It is located at a position corresponding to the inrush point P2. When the spatial scanning locus is followed by 180 ° from the entry point P2, the point P3 of the spatial scanning locus PTA2 is reached. This detachment point P3 means that the magnetic tape 6 has reached the entry point P4 to the next recording track PTA3, and if the recording track PTA3 is followed by 135 °, then the flyhead glaze head for A head is reached. Reach 4A.

Similarly for the scanning trajectory of the main head 1B, if you follow the recording track PTB1 180 ° from the entry point P10, you will reach the departure point P11, and consequently the entry point P12 of the spatial scanning trajectory PTB2,
After that, if you follow the spatial scanning locus PTB2 by 180 °, you will leave P
13. Therefore, it reaches the entry point P14 of the next recording track PTB3.
After that, if you follow 135 ° on the recording track PTB3, B
Reach Head Flying Erase Head 4B.

In this way, the flying erase heads 4A and 4B are
At the timing when the main heads 1A and 1B are at the entry points P0 and P10 of the recording tracks PTA1 and PTB1, the flying erase heads 4A and 4B have a recording track PTA3 and PTB3 of 135 ° adjacent to each other with one recording track between them. This means that the main heads 1A and 1B are scanned by 495 ° in advance of the phase position of.

The flying erase head 4A,
Flying erase heads 4A, 4B by positioning 4B
Even if the running speed mode of the magnetic tape 6 changes, the flying erase heads 4A and 4B always record the recording pattern PTA3 and
Old recorded information can be erased by recording the erase signal with an azimuth angle opposite to that of the video information recorded in the PTB3.

If the flying erase heads 4A and 4B are positioned at 135 ° from the plunge points P10 and P4 of the adjacent recording tracks PTB1 and PTA3, respectively, the flying erase heads 4A and 4B will not move when switching to another speed mode. There is a case where the azimuth angle coincides with the azimuth angle on the recording track and the recorded information cannot be erased. However, the positioning as shown in FIG. 5 can effectively avoid such a risk.

Since the common head is used also in the first and third traveling speed modes, the main heads 1A and 1B, which are recording heads, are used.
And the corresponding flying erase heads 4A and 4B have a phase relationship of 180 ° × 2 + 135 ° in the same manner as described above with reference to FIG. 3 in the case of FIGS. 2 and 4 as well. It is set.

However, in the case of the first traveling speed mode shown in FIG. 2, recording is performed by using the sub heads 2A and 2B at the phase position 180 ° ahead of the main heads 1A and 1B as the recording heads, and thus the recording heads are recorded. Subhead 2A, 2B
And the corresponding flying erase heads 4A and 4B are selected to have a positional relationship of 180 ° × 1 + 135 °.

(G2) Head operation in the second traveling speed mode With the above configuration, when performing continuous shooting editing in the first, second, and third traveling speed modes, the preceding flying erase heads 4A and 4B are used. The video information of the new recording pattern is recorded by the main heads 1A and 1B or the sub heads 2A and 2B while erasing the video information of the old recording pattern.

Further, the skijana 1 includes the main heads 1A and 1B, the subheads 2A and 2B, the flying erase heads 4A and 4B as shown in FIG.
When the first, second, and third traveling speed modes are selected and designated by operating at the timings shown in FIGS. 7 and 8, the continuous shooting edit code is set in any traveling speed mode. When operating with, the video information of the old recording pattern is shared with the common flying erase head 4 to prevent the image quality from actually deteriorating at the cut-out point.
It can be erased using A and 4B.

First, the main heads 1A and 1B of the scanner 1 are rotated by 180 ° by the switching pulse SWP shown in FIGS. 6 (A), 7 (A) and 8 (A) to rotate the main head 1A. , 1B sequentially reach the entry point for the magnetic tape, the main heads 1A, 1B are switched to the operating state.

The pair of heads, that is, the A head and the B head, are in the state of repeatedly operating sequentially ... B0, A1, B2, A3, B4
It is represented as …….

First, at the cut-out point at which the continuous shooting editing is ended when the magnetic tape 6 is running in the second running speed mode, a point 45 ° later than the point t _{1 in} FIG. 6 is preceded by the end of the new recording operation. in t ₁₁ and time t ₂₁ later than time t ₂ only 45 °, Yotsute that lowers the erase signal FEB and FEA, terminates the erase operation of a flying erase head, a recording signal REC2 at time t ₆ after the The recording operation is ended by lowering the operation.

In this way Flying Erase Heads 4A, 4B
The main heads 1A and 1B produce a recording pattern as shown in FIG. 9 at the so-called cut-out point of so-called continuous shooting editing in which the new recording pattern ends and the old recording pattern returns.

Timing of time t ₁ is Meinhetsudo 1B is in position B4 inrush point of the magnetic tape 6, the other Meinhetsudo 1A this time is in the position of disengagement point A4 of the magnetic tape 6. Flying erase head 4B for B head at this timing
Is at a position 495 ° ahead of the main head 1B, and thus at position FEB4 on the magnetic tape 6, as described above with respect to FIG. On the other hand, the flying erase head 4A for A head is also 495 ° with respect to the main head 1A.
Position preceded by only, that is, position FEA4 on the spatial scanning locus
It is in.

In this state, when the flying erase head 4B for the B head ends the erasing operation by the erasing signal FEB which falls at the time t _{11 which} is delayed by 45 ° from the time t ₁ ,
As described above with reference to FIG. 3, the flying erase head 4B for the B head has a head width of two tracks in the second traveling speed mode, so two adjacent tracks (in this case, the main heads 1B and 1A are The erase operation is completed by erasing data up to the positions B6 and A7 at which the magnetic tape 6 enters the recording track.

Then, when the erase operation is terminated by the erase signal FEA which falls at time t ₂₁ when the flying erase head 4A for A head is delayed by 45 ° from the time t ₂ , the flying erase head 4A for A head enters in the same manner as described above. Point A
Erase up to the recording track corresponding to B7 and B8 and end the erase operation.

After the erase operation on the magnetic tape 6 is completed by the flying erase heads 4A and 4B preceding the main heads 1A and 1B in this way, the main head 1B enters the rush point B8.
The continuous shooting editing is completed by the recording signal REC2 which falls at the time point t ₆ when the new video information is completely recorded in the recording track corresponding to.

Thus, at the end of the continuous shooting edit mode, the recording track corresponding to the rush point B8 is erased by the same azimuth angle by the latter half of the flying erase head 4A for A head, so the old video information is completely erased. I can't
As a result, new video information may not be recorded "cleanly".

In the frame feed playback mode, if the head for still playback is selected in advance as the head for scanning the recording track next to the recording track where the old video information cannot be erased, that is, the main head 1A, Since the recorded information of the unerased portion generated at the seam position at the time of the cutout need not be still reproduced, the reproduced image that is still reproduced does not deteriorate in image quality.

(G3) Head Operation in Third Travel Speed Mode Next, in the third travel speed mode, as shown in FIG. 10, the width of each recording track is set to the second travel speed mode (the ninth travel speed mode).
Compared with the case of (Fig.), It is about 0.665 times narrower, and the flying erase heads 4A and 4B for A head and B head are almost 3 times as described above with reference to Fig. 4.
By having the head width corresponding to the recording track width of the book, the erase operation is performed across the four recording tracks.

Of particular concern is the fact that the end of the old erase pattern side of the flying erase heads 4A and 4B protrudes over the next adjacent track by about 1/2 track, which makes the seam between the new record pattern and the old record pattern. There is an unerased portion of old video information at the location. However, in the present invention, the recording track in which the unerased portion occurs is
For example, in the frame feed reproduction mode, the flying erase is always performed on the recording track (that is, the recording track on the B head side) other than the recording track (for example, the recording track on the A head side) for repeatedly reproducing the still image. The heads 4A and 4B are erased.

In other words, the continuous recording track is the main head 1A.
4 and 1B, the old video information is erased while overlapping about 1/3 by the flying erase heads 4A and 4B preceding by 675 °, and then the main heads 1A and 1B are erased. Then, in the continuous shooting edit mode in which new video information is recorded, the erase signals FEA and FEB are caused to fall at the timings of time t ₁ and time t _{2 in} FIG. 7 prior to the end of the new recording operation. particular Yotsute, the flying erase heads 4A, terminates the erase operation 4B, the recording operation is ended by lowers the recording signal REC3 at time t ₇ after this.

In this way, flying erase heads 4A, 4B,
Main heads 1A and 1B are 10th at the cutout point.
A recording pattern as shown is produced.

Timing of time t ₁ is Meinhetsudo 1A is in the inrush point A4 in space travel locus, this time A head for a flying erase head. 4A, the position of FEA4 on position or spatial travel locus was 675 ° ahead Meinhetsudo 1A is there.

In this state, at time t ₁ , when the flying head erase head 4A for A head ends the erase operation due to the fall of the erase signal FEA, the flying erase head 4A for A head is rushed to the magnetic tape 6 at the inrush points A7, B8,
Erase the recording tracks corresponding to the second half of B6 and the first half of A9.

In the timing of the time point t _2, Meinhetsudo 1B is in the inrush point B5 in space travel locus, this time B head for flying erase head 4B is Meinhetsudo 1B than 675 °
It is at the preceding position, that is, the position of FEB5 on the space travel locus.

In this state, when the flying erase head 4B for B head ends the erasing operation due to the fall of the erase signal FEB at time t ₂ , the flying erase head 4B for B head is rushed to the magnetic tape 6 at the rush points B8, A9,
Erase the recording tracks corresponding to the latter half of A7 and the first half of B10.

After the erasing operation on the magnetic tape 6 is completed by the flying erase heads 4A and 4B preceding the main heads 1A and 1B in this manner, the main head 1A enters the entry point A9.
At the time t ₇ that One Owa recorded a new video information to the corresponding recording tracks to, to end the editing takes by go-between passage to the recording signal REC3.

(G4) Head operation in the first traveling speed mode Next, when performing the insert edit in the state where the first traveling speed mode is selected, as described above with reference to FIG. 2, the flying erase heads 4A and 4B are The erasing operation is performed along the scanning locus for almost one track, and the information is recorded by the sub heads 2A and 2B which travel 180 degrees ahead of the main heads 1A and 1B.

As a result, the time t ₁₁ which is 45 ° behind the time t _{1 in} FIG.
Erase signal FEA falls in, 4 from the next time point t ₂
When the erase signal FEB falls at the time t _{21 which} is delayed by 5 ° and further falls to the recording signal REC 1 at the time t ₄ , when the continuous shooting edit mode ends, the new video information is changed to the first video information.
As shown in FIG. 11, flying erase heads 4A and 4B record "cleanly" up to a recording track corresponding to inrush point A5 where old video information is erased.

In this way, insert editing can be performed at the joint position between the new recording pattern and the old recording pattern without leaving a recording track that substantially deteriorates the image quality.

(G5) Other Embodiments (1) In the above embodiment, as an unerased recording track that occurs at the joint position between the new recording pattern and the old recording pattern in the third traveling speed mode (FIGS. 9 and 10), The case where the recording track by the B head is selected and the still image is reproduced from the A head recording track at the time of frame feed reproduction was described. On the contrary, the unerased recording track remaining at the seam position is A.
Even if the head recording track is selected and the still image is reproduced from the B head recording track in the frame feed reproduction mode, the same effect as the above case can be obtained.

(2) In the above embodiment, the case where the recording pattern on the magnetic tape having the β system format is continuously shot and edited is described, but the present invention can be widely applied to other recording systems, and the essential point is to mutually The present invention can be widely applied to a VTR having a mode in which a magnetic tape is run at a plurality of running speeds that are not in an integral multiple relationship, when reproducing continuously edited information in a still image.

As described above, according to the present invention, in the VTR having a plurality of traveling speed modes, the cut-out point position from the new recording pattern to the old recording pattern is set when the continuous shooting editing is finished for the recording medium. The first and second magnetic heads and the first and second magnetic heads are formed so that the recording track having the unerased portion of the old recording pattern formed at the seam portion of the first and second magnetic heads always has one of the first and second azimuth angles. By selecting the timing at the end of the operation of the flying erase head of No. 2, it is possible to eliminate the influence of the recording track having the unerased portion of the old recording pattern at the time of frame feed reproduction, thus making it possible to reproduce the reproduced image. A video signal recording / reproducing apparatus capable of preventing deterioration of image quality can be easily realized.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing the configuration of a scanner used in a video signal recording / reproducing apparatus according to the present invention, FIG.
3 and 4 are schematic line portions showing the positional relationship between the recording head and the flying erase head in the first, second, and third traveling speed modes, and FIG. 5 is the position between the recording head and the flying erase head. FIG. 6 to FIG. 8 are schematic diagrams showing the relationship in relation to the scanning loci of the recording head and the flying erase head, and FIGS. 6 to 8 are signal waveform diagrams showing the timings of the operations of the flying erase head and the recording head.
FIGS. 10, 10 and 11 are schematic diagrams for explaining the erasing operation of the flying erase head and the recording operation of the recording head in the second, third, and first traveling speed modes by using the scanning loci on the magnetic tape. is there. 1 ... Skiana, 2 ... Rotating drum, 1A, 1B ... Main head, 2A, 2B ... Sub head, 6 ... Magnetic tape.

Claims (1)

[Claims] 1. A plurality of traveling speed modes for traveling a recording medium at mutually different traveling speeds, wherein the recording medium is mutually traveled while traveling at a traveling speed corresponding to the designated traveling speed mode. A helical scan type video signal recording / reproducing apparatus for recording video information by alternately forming recording tracks having different first and second azimuth angles, each having the first or second azimuth angle. The first and second magnetic heads for recording the video information and the first magnetic head for erasing the video information having the second or first azimuth angle, which are provided in common for the respective traveling speed modes. And a second flying erase head, the new recording pattern is changed to the old recording pattern when the continuous shooting and editing for the recording medium is finished. It said recording tracks having erased leaving portions of the old recording pattern formed on the joint portion of the Katsutoauto point position of,
The timing at the end of the operation of the first and second magnetic heads and the first and second flying erase heads is selected so as to always have one of the first and second azimuth angles. A video signal recording / reproducing device characterized by the above.