JPS62262252A - Tracking control device - Google Patents

Abstract

PURPOSE:To achieve a just-tracking to a rotary head at the midposition of a recording track by moving the head so as to obtain the tracking condition as to both side ridges of the recording track and then moving the rotary head at the midposition of two positions. CONSTITUTION:Lock phases DELTAphi1 and DELTAphi2 representing both side ridge positions of the recording track TR are detected by controlling the lock phase DELTAphi of the recording track TR with respect to the rotary heads 3A, 3B to obtain the center phase DELTAphi3[=(DELTAphi1+DELTAphi2)/2]. In applying the tracking control to the rotary heads 3A, 3B, the heads 3A, 3B are subject to just tracking to the midposition of the recording track TR, even if the rotary heads 3A, 3B are not landed onto the recording track TR or no just tracking state is attained even with landing, the rotary heads 3A, 3B are subject to just tracking control onto the recording track TR surely.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Industrial Field of Application The present invention relates to a tracking control device, and is particularly suitable for application to a digital signal recording/reproducing device in which recording tracks are formed obliquely on a tape by a rotating head. It is.

B. Summary of the Invention The present invention provides a tracking control device for tracking a rotary head on a recording track formed diagonally on a tape. By controlling the tracking to a position that locks to the phase,
The rotary head can be reliably tracked to the recording track on the magnetic tape.

C. Prior Art As a digital signal recording/reproducing apparatus of this type, a video tape recorder (VTR) is used which uses a rotary head to record digital video signals and audio signals diagonally onto a magnetic tape.

D Problems to be Solved by the Invention In this type of VTR, in an editing mode (for example, insert editing, assemble editing, etc.) in which a new signal is recorded on a tape on which a digital video signal or audio signal has already been recorded, Continuity may be disrupted at the joint between an already recorded track and a newly recorded track, and when playing back a tape that has been edited with disrupted continuity, the rotating head must not be placed over the recording track. When landing, it is necessary for the rotary head to sufficiently follow the disturbance in continuity at the seam and to track the recording track.

The position of the recording track on the tape is determined two-dimensionally by using the longitudinal distance from the reference position on the tape, such as the synchronization control signal (so-called CTL signal), and the distance from the widthwise edge of the tape. However, if the edges of the tape are deformed due to fatigue, it is not possible to increase the accuracy of the distance in the width direction, so There is a possibility that the rotating head may not be able to land on the recording track in a tracking state.

This problem becomes particularly important when the track width and track pitch are narrowed in order to record information at high density on tape, such as in the case of digital, L/VTR, etc. Become.

The present invention has been made in consideration of the above points, and when the rotary head plays back a tape having diagonally formed recording tracks, when the rotary head lands on the tape, the rotary head is moved relative to the recording track. The present invention attempts to propose a tracking control device that can reliably control the tracking of a rotary head to a recording track according to a lock phase.

E Means for Solving the Problem In order to solve this problem, in the present invention, a rotary head 3A,
In an information recording and reproducing apparatus configured to pick up information recorded on a recording track TR by tracking control of the rotary heads 3A and 3B,
By controlling the lock phase Δφ of the tape 4 with respect to the rotary heads 3A, 3B when landing the tape 4 on the recording track TR, the first and The second lock phases Δφ1 and Δφ2 are detected, and the center phase Δφ of the first and second lock phases Δφ1 and Δφ is determined based on the detection results.

The rotary heads 3A and 3B are controlled by tracking B to a position where the phase is locked to the position shown in FIG.

By controlling the lock phase Δφ of the recording track TR with respect to the F action rotary heads 3A and 3B, the recording track TR
Detect the lock phases Δφ1 and Δφ2゛ representing the positions of both side edges of the center phase Δφ, (=(Δφ1 +Δφ! )
Find /2).

If the rotary heads 3A, 3B are tracked to the center phase Δφ, the rotary heads 3A, 3B will just track to the center position of the recording track TR. In either case, the rotating heads 3A, 3B are reliably just tracked on the recording track TR, in either case when the rotary heads 3A, 3B are not in the just tracking state even if they land (in other words, when there is mistracking). can be controlled.

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

(G1) First Embodiment In FIG. 1, 1 is a scanner, and a magnetic tape is
The digital data I) mw is recorded on the recording track TR by scanning in a diagonal direction, or the digital data D1 recorded on the recording track TR is
It is designed to play w.

The scanner 1 is rotationally driven in synchronization with an external reference synchronization signal REF by a separate speed servo system (not shown).

The traveling speed of the magnetic tape 4 is set by the capstan 5 to a speed corresponding to its rotational speed, and the rotational phase of the capstan motor 7 is controlled by the drive output MDA given to the capstan motor 7 from the capstan servo circuit 6. By doing so, the rotating heads 3A, 3 of the tape 4
The lock phase for B is controlled.

When the scanner 1 is operating in the recording mode, a large number of recording tracks TR adjacent to each other in the longitudinal direction are recorded on the magnetic tape 4 as shown in FIG.
A synchronizing signal CTL is recorded in the longitudinal direction of the magnetic tape 4 along this recording track TR.

When the scanner 1 is operating in the reproducing operation mode, this synchronization signal CTL is picked up by a fixed synchronization signal head 1) and sent through an amplifier circuit 12 to a detected phase signal P, a5. The signal is then applied to the phase comparator circuit 13.

The phase comparison circuit 13 is supplied with an external reference synchronization signal REF as the reference phase signal P*tr via the controllable delay circuit 14, and the phase comparison circuit 13 receives the detected phase signal PCT.
A phase error signal Ptl corresponding to the phase difference between L and reference phase signal P□, and a lock phase signal LOCK representing the lock phase of the rotary heads 3A and 3B with respect to the recording track TR.
and send out. This phase error signal P□ is converted into a direct current in a low-pass filter circuit 15 and then applied to a drive circuit 16. The drive circuit 16 has a phase error signal PEII of O.
A drive output MDA is sent out to control the rotational phase of the capstan motor 7 in the direction of .

Here, the delay phase amount of the controllable delay circuit 14 is the phase control signal P,. , a predetermined preset phase amount φ. (
The clock phase Δ
φ (representing the relative phase of the rotary heads 3A, 3B with respect to the recording track TR).

In this way, the magnetic tape 4 receives the detected phase signal P CTL and the reference phase signal P I obtained based on the synchronization signal CTL.
With the EF phases matching, head 3A of scanner 1
, 3B position is obtained.

In this phase servo state, the rotary heads 3A and 3B of the scanner 1 are phase-locked to the recording track TR of the tape 4, and the digital data D picked up from the rotary heads 3A and 3B is transferred to the processor 21. After signal processing such as deshuffling, error detection, and error correction, the reproduced data DATA is transferred to the processor 2.
1 to a recording/reproducing circuit (not shown). In this embodiment, the processor 21 receives recording data DATA from the recording/reproducing circuit in the recording mode, performs data processing such as shirt ringing, and then outputs the digital data DI1). l
is transmitted to the scanner l.

In addition to the above configuration, the processor 21 receives the digital data D*1. When the error rate of I exceeds a predetermined value, a mistracking detection signal S□ is sent to the sequencer 22.

When the sequencer 22 receives the enable signal EN, it enters the automatic tracking control operation mode, and the sequencer 22 enters the automatic tracking control operation mode.
The mistracking detection signal S given from 2. and the phase lock signal LOCK received from the phase comparison circuit 13, the rotary heads 3A and 3B are moved to the recording track TR.
A phase control signal P that causes just tracking,
. Send 8. In this embodiment, the enable signal EN
is separately supplied from the system controller when the VTR is set to playback mode, &W collection mode, or automatic tracking mode by an operator's operation. Phase control signal P to control delay circuit 14
□Send 3.

That is, first, as shown in FIGS. 4 and 5, when the rotary heads 3A, 3B land on the recording track TR, the sequencer 22 enters the automatic tracking control program in step SPI of FIG. 1. When the enable signal EN is received at step SP2, an automatic tracking operation mode is entered in which the phase of the magnetic tape 4 is controlled while capturing and monitoring the lock phase signal LOCK and the mistracking detection signal S□. At this time, the sequencer 22 moves to step SP3 and gradually increases the lock phase Δφ specified by the phase control signal P CON from the initial phase 0.

At this time, the controllable delay circuit 14 receives the phase control signal P,. 8
By controlling the phase delay value , the reference phase signal PIIEF is gradually changed in the direction of increasing it. In response to this, the phase comparator circuit 13 gradually increases the rotational phase of the capstan motor 7, thereby increasing the rotational phase of the head 3A of the scanner I.

The phase of the magnetic tape 4 relative to 3B is shifted in the positive direction (.

At this time, since the heads 3A and 3B are in a state of landing on the recording track TR, the processor 21 has not detected any mistracking, and the mistracking detection signal S is not detected by the processor 21. is maintained at a logic "0" level.

Eventually, as the phase of the magnetic tape 4 shifts in the positive direction, the heads 3A and 3B begin to deviate from the track.
The error rate of the digital data DIIW picked up by the heads 3A and 3B increases, and when the error rate eventually exceeds a predetermined value at time t2 in FIG. 4, the processor 21 moves to step SP4 to detect the occurrence of mistracking. is detected and the mistracking detection signal SE1 is raised from the logic "0" level to the "1" level. At this time, the sequencer 22 takes in the lock phase No. 13 LOCK due to the change in the mistracking detection signal 5EII and sets the lock phase Δφ at this time.
=Δφ1 is stored.

Next, the sequencer 22 moves to step SP5, and the mistracking detection signal 5Ell changes from the logic "0" level to "
It is determined whether the level has changed to "1". Here, at time t2 in FIG. 4, the mistracking detection signal 5il
Since l has changed from the logic "0" level to the logic rlJ level, an affirmative result is obtained in step SP5, and the sequencer 22 moves to step SP6 and sets the phase control signal P, which slowly changes the lock phase Δφ in the negative direction. .

, is sent. At this time, the phase comparison circuit 13 shifts the phase of the magnetic tape 4 in the negative direction via the capstan motor 7.

As a result, the heads 3A and 3B return to the tracking state,
It shifts across the recording track while maintaining the tracking state. Eventually, when mistracking occurs at the opposite edge at time t in FIG. 4, the processor 21 changes the mistracking detection signal 5EII to logic "0" based on the digital data D and Iw picked up from the heads 3A and 3B. ” level to the logic “1” level.

In response, the sequencer 22 performs step SP in FIG.
7, the lock phase signal LOCK is fetched to store the phase Δφ−Δφ2, and the process moves to the next step SP8.

This step SP8 calculates the average value of the phases Δφ1 and Δφ2 stored in steps SP4 and SF3 as a new lock phase Δφ−Δφ, as expressed by the following formula % (1), and uses this as a new lock phase Δφ−Δφ. Signal P
It is sent to the controllable delay circuit 14 as CON.

The controllable delay circuit 14 provides a reference phase signal P□ corresponding to this lock phase to the phase comparator circuit 13.
The drive control is performed so that the cab stern control 7 is locked to this lock phase Δφ=Δφ3. As a result, the rotary heads 3A and 3B scan the recording track from time t in FIG. 4 onward while being locked to the phase Δφ=Δφ expressed by equation (1).

In this way, the sequencer 22 ends the processing program for the automatic tracking operation mode in which the rotary heads 3A, 3B are controlled to just track the recording tracks in step SP9.

This automatic tracking operation is performed at time t, ~t in FIG.
, which means that after moving from one side edge of the recording track to the other side edge during the automatic tracking operation period TTI, the phase is locked to the phase corresponding to the central position.

Incidentally, the fact that the processor 21 raised the mistracking detection signal SEW from the logic "0" level to the logic rlJ level at time t2 means that the rotary heads 3A and 3B have moved to the position of one side edge of the recording track TR. On the other hand, the fact that the processor 21 similarly raised the mistracking detection signal 5EII+ from the logic rOJ level to the logic "1" level at time t□ means that the other side of the recording track TR concerned This means that it has moved to the edge position. Therefore, the average value Δφ of the locking phases Δφ1 and Δφ2 at times t2 and t3.

The state in which the rotary heads 3A and 3B are locked to a lock phase that satisfies the equation (1) indicates that the rotary heads 3A and 3B are phase-locked to a phase corresponding to approximately the center position of both side edges of the recording track TR.

Thus, according to the configuration of FIG. 1, the rotating heads 3A, 3B
When landing on the recording track TR, as indicated by the symbol 1 in FIG.
After the shift to φ1, the lock phase on the rear edge side of the track TR moves to a state that is shifted to Δφ2, as indicated by 3, and then, as indicated by 4, the phase is approximately halfway between the front edge and the rear edge. It is possible to perform automatic tracking control in a state in which just tracking is performed on Δφ.

In addition to this configuration, the sequencer 22 includes a rotating head 3A.
, 3B has landed at a position shifted outward from the rear edge of the track TR, as indicated by the symbol Kll in FIG.
When the mistracking detection signal 5E1) is taken in at P2, its logic level is logic "1".

At this time, the sequencer 22 changes the lock phase Δφ in the positive direction in step SP3 (time 1++ in FIG. 6), so that the heads 3A and 3 cross the rear edge of the recording track TR at time t+z and move the heads 3A and 3 into the inside of the track TR.
The phase of the magnetic tape 4 is controlled so that B moves. As a result, at time 1+1 in FIG.
, the processor 21 changes the mistracking detection signal 5EII to logic rl.
Change from J level to "0" level. The position 12 (FIG. 7) of the rotary heads 3A, 3B at this time means that the rotary heads 3A, 3B have moved to the trailing edge position of the recording track TRO.

In this state, the sequencer 22 performs step S in FIG.
Get a negative result in P5 and move to step 5 PIO,
Phase control signal P,. Then, the lock phase Δφ is further controlled to slowly change in the positive direction, and thus the rotary heads 3A and 3B are moved across the recording track TR to reach the recording track T as shown by reference numeral 13 in FIG.
Move it to the front edge position of R.

Eventually, at time t13 in FIG. 6, the head 3A.

When 3B reaches position WK13, the sequencer 22 moves to steps SP7 and SF3 and moves to the rotating head 3A.

3B to the just tracking position at 14, and thus from time point jiff onwards, the rotating head 3A
, 3B as just tracking lock phase Δφ−Δφ,
can be phase locked.

In this way, according to the configuration of FIG. 1, the enable signal E
Even when the rotary heads 3A, 3B are at the mistracking position when the signal N arrives and misland on the recording track TR, the rotary heads 3A, 3B can be tracked to the just tracking position.

According to the above configuration, when the enable signal EN instructing automatic tracking operation arrives, the rotating head 3A,
In either case when the rotary heads 3A and 3B land on the recording track or when they mis-land, the rotary heads 3A and 3B can be reliably just tracked to the center position of the recording track. Therefore, even when the recording track TR is formed in a format that forms a tape pattern with an extremely narrow track pitch in order to perform high-density recording, the tracking control of the head can be reliably performed.

Incidentally, when recording a new signal by insert editing or assembling editing on a magnetic tape recorded by another VTR, with a conventional VTR, the track angle is a few degrees, and the wear of the tape edge is 20 to 30 [μm]. If so, even if recording is performed at a recording density with a track pitch of approximately 50 [μm] in consideration of the linearity of the recording track TR, there is a risk of mislanding. On the other hand, according to the above-described configuration, even if such a mislanding occurs, it is possible to reliably pull the vehicle into the just tracking position.

Note that based on the reproduced signals picked up by the rotary heads 3A and 3B in this way, the rotary heads 3A and 3B
(Therefore, if it is possible to control the tracking of the scanner l to the recording track TR on the magnetic tape 4, even when using a scanner l that has a reproducing head and a recording head separately mounted on a rotating drum, it is possible to control the tracking of the recording track TR on the magnetic tape 4. Even when the recording head inserts and assembles a new track to perform recording following the existing recording track TR, since the rotating drum 2 is made of a rigid body with a small error (for example, only a few μm), Recording tracks can be recorded with sufficient continuity substantially at the seams.

(G2) Second Embodiment FIG. 1θ shows a second embodiment of the present invention. In this embodiment, the sequencer 22 (FIG. 1) controls the recording track TR in step SP4 of FIG. After the front edge lock phase Δφ=Δφ is stored, the moving speed of the rotary head is increased until the rear edge lock phase Δφ=Δφ2 is stored in step SPY.

That is, in FIG. 10, as shown by assigning the same reference numerals to parts corresponding to those in FIG. 4, when it is detected that the rotary heads 3A, 3B have come to the front edge position at time t,
The sequencer 22 performs step SP6 or 5PIO in FIG.
As a calculation process, the rotating heads 3A and 3B are moved by a predetermined jump amount Δφ. It jumps all at once in the direction of the rear edge of the recording track TR and moves to the lock phase Δφ-Δφ4 position in a short period of time.

Thereafter, the sequencer 22 slowly moves the rotary heads 3A, 3B toward the rear edge, and eventually detects that the rotary heads 3A, 3B have reached the rear edge at time t3+, and at step SP? in FIG. , executes the processing of SF3.

In this way, compared to the case of FIG. 4, the jump amount Δφ is reduced. Since the rotary heads 3A and 3B can be moved all at once, the automatic tracking operation time T□ can be shortened.

When using the method of moving the rotating head shown in Fig. 10, 1)
As shown in the figure, the head width Hw of the rotating heads 3A and 3B
is sufficiently smaller than the recording track width Tw of the recording track TR, that is, Hw < Tw < Tp
--In the case of (2), the jump amount Δφ. Δφ. (Tw-H-...(3) or Δφ.<(Tw-HM)...
(4), where T is the track pitch.

On the other hand, as shown in FIG. 12, the rotating head 3A,
The head width Hw of 3B is the track width T of the recording track TR.
thicker than w (and in the case of azimuth recording (a recording method in which the azimuth directions of adjacent tracks are reversed), that is, Hw >'l', -TP...
- In the case of (5), the head width H4 and track width Tw
Between H1shi2'rw (-2TP)...
...Since the relationship (6) exists, the jump amount Δφ・ is Δφ. ”(TF) equivalent ・・・・・・(7)
or Δφ. <(TP) equivalent ・・・・・・(8)
As expressed by , the track width T1. 1 (therefore, the track pitch TP).

Incidentally, in FIG. 12, the rotating heads 3A and 3B have their own azimuth angles, and sequentially adjacent recording tracks TR2, TR4... (or TR1, TR3...
...) recording data to the rotating head 3A (or 3B)
It is available for pickup.

When doing this, for example, at time 1t in FIG. 4, the rotary head 3A detects the lock phase Δφ1 about the leading edge of the second recording track TR2 while straddling the first and second recording tracks TRI and TR2. For example, the sequencer 22 moves the head 3A by the jump amount Δ expressed by equation (7).
φ. It is caused to jump all at once to a position near the trailing edge of the second track TR3.

Thereafter, as shown at time t2 to t21 in FIG. 10, if the head 3A is slowly moved in the direction of the trailing edge of the second track TR2, the rotary head 3A will eventually move to the second track TR2 at time t3+ in FIG. and third recording track TI
? 2 and TR3 while recording the second recording track TR.
The lock phase Δφ2 for the trailing edge of 2 can be detected.

After that, in step SP8 (FIG. 3), if the rotary head 3A is returned toward the front edge by the lock phase, which is half of the amount of movement, the rotary head 3A is moved to the second track TR2.
It can be controlled to just track.

Note that the rotary head 3B can also be controlled to just track in the same manner.

(G3) Third Embodiment FIG. 13 shows a third embodiment. In this case, the rotary heads 3A, 3B are adjusted to the track width T, 1 in the same manner as described above with respect to FIG. 1). It has a small head radiation Hw.

When trying to just track the center position of the track TRO by the rotary heads 3A and 3B, as described above with reference to FIG. 6, when the enable signal EN arrives at the sequencer 22, as described above with reference to FIG. There is a risk of mis-landing.

At this time, in the case of the embodiment shown in FIG. 13, first step 5 PIO of FIG.
At this point, the rotary heads 3A and 3B are started to move in the direction indicated by arrow a. However, in the case of FIG. 13, the amount of movement of the rotary heads 3A, 3B in that direction is a predetermined value, for example l/
When the tracking state is still not obtained even after reaching 2 pitches (that is, Tr/2), the sequencer 22
is returned to the initial state by moving the rotary heads 3A, 3B in the opposite direction as shown by the arrow in FIG.
Move 3B.

In FIG. 13, the sequencer 22 cannot obtain tracking information even though the rotary heads 3A and 3B have moved by 1/2 pitch in the direction of arrow a. This means that the position is such that the automatic tracking operation period TTI is shorter when the tracking operation is performed on the track TPO in the opposite direction than when the tracking operation is performed on the track TPO on the side a. Therefore, if the tracking conditions cannot be obtained by moving the rotary heads 3A and 3B in the direction a during 1/2 pitch, the tracking conditions can be obtained by moving the rotary heads 3A and 3B in the opposite direction. Automatic tracking operation time T7. can be effectively shortened.

In the embodiment shown in FIG. 13, the mouse that moves the rotary heads 3A and 3B in the direction a is provided with a plurality of N rotary heads mounted on the scanner 1, and therefore, each head covers N recording tracks on the tape. In the case where scanning is performed every time, the amount of movement in the direction a side may be selected to be about NTP/2.

(G4) Other embodiments (1) In the above embodiment, as described above with reference to FIGS. 4 and 6, the value of the lock phase signal LOCK when the enable signal EN arrives is set as the initial phase Δφ=O. Embodiment y has been described in which the subsequent change in the lock phase Δφ is detected, but instead of this, FIGS.
As shown in the figure, the rotary heads 3A and 3B are connected to the track TR.
The lock phase Δφ when moving to one side edge of is Δφ−
Even if the lock phase Δφ=Δφ2 and ΔφH are detected until the lock phase Δφ=Δφ2 and then moves to the other side edge, the same effect as in the above case can be obtained.

In addition, in this embodiment, if a binary counter that actually starts counting from time t8 or t+z is used, the value of the tracking lock phase Δφ can be calculated by a digit shift method. , thus simplifying the overall configuration.

(2) In the embodiments shown in FIGS. 4 and 6, the rotary head is moved continuously, but it is also possible to quantize this slope and change it in steps. , the same effect as in the above case can be obtained.

(3) In the above-mentioned embodiment, a case has been described in which the lock phase of the rotary heads 3A and 3B with respect to the recording track TR is detected based on the synchronization signal CTL recorded in the longitudinal direction of the magnetic tape 4. However, the means for detecting the phase of the recording track TR on the magnetic tape 4 is not limited to this, and various means can be used.

(4) In the above embodiment, when obtaining the mistracking detection signal S□ from the processor 21 (FIG. 1), it is formed by monitoring changes in the error rate of the digital data DI1w picked up by the rotary heads 3A and 3B. Although the case is described above, the mistracking detection signal S□ may be generated based on the error correction when the digital data DIIM cannot be corrected, for example.

Effects of the Invention As described above, according to the present invention, when a rotary head is caused to track a recording track recorded on a tape,
After moving the head so as to obtain a tracking condition for one side edge of the recording track, and then moving the head until a state where a tracking condition can be obtained for the other side edge, the tracking condition is obtained 2. By moving the rotary head to an intermediate position between the two positions, the rotary head can be reliably just tracked to the center position of the recording track.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a first embodiment of the tracking control device according to the present invention, FIG. 2 is a route map showing the recording pattern of the magnetic tape 4, and FIG. 3 is a processing procedure of the sequencer 22 shown in FIG. Flowcharts illustrating FIGS. 4 and 5
Figures 6 and 7 are a curve diagram and a route map showing changes in the locking phase of the rotary head during the automatic tracking operation period, respectively, and Figures 8 and 9 are a route diagram showing changes in the locking phase in a modified example. Figures 10 to 12 are curve diagrams and route diagrams for explaining changes in the locking phase of the rotating head in the second embodiment, and Figure 13 shows changes in the locking phase of the rotating head in the third embodiment. It is a route map showing. l...Scanner, 3A, 3B...Rotating head, 4...Magnetic tape, 5...Capstan, 6.Old...Capstan servo circuit, 7.
... Capstan motor, 21 ... Processor, 22 ... Sequencer.

Claims (5)

[Claims] (1) In an information recording/reproducing device configured to pick up information recorded on an information recording track by tracking and controlling a rotary head to a recording track formed on a tape, the rotary head is landed on the recording track. By controlling the lock phase of the tape with respect to the rotary head, first and second lock phases are detected in a state in which the rotary head is phase-locked to both edges of the recording track, and the detection is performed. A tracking control device characterized in that, based on the result, tracking control is performed on the rotary head to a position where the rotation head is phase-locked to a central phase of the first and second lock phases. (2) The digital data recorded on the recording track is picked up by the rotary head, and the lock phase at the timing when the error rate of the picked-up digital data exceeds a predetermined value is determined by the first and second signals. The tracking control device according to claim 1, which is configured to detect as a locked phase. (3) In the editing mode, after tracking the rotary head to the center phase of the recording track, use the rotary head or another rotary head to create a new recording track adjacent to the recording track recorded on the tape. 2. A tracking control device according to claim 1, wherein a recording track is formed by recording information such as: (4) When the first lock phase is detected when landing the rotary head on the recording track,
2. The tracking control device according to claim 1, wherein the time required for tracking control is shortened by jumping the rotary head by a predetermined phase amount in the direction of the second lock phase. (5) When causing the rotary head to land on the recording track, if the rotary head has mis-landed on the recording track, the locking phase for the rotary head is changed to the first direction. When the first lock phase is not achieved even after changing by a predetermined amount, the lock phase for the rotary head is reversed to the second direction and the lock phase is temporarily returned to the initial state. 2. The tracking control device according to claim 1, wherein the tracking control device searches for the first lock phase by moving in the second direction after returning to the second direction.