JPH0568152B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a video signal reproducing device that enables variable speed reproduction.

BACKGROUND ART AND PROBLEMS First, variable speed playback in an example of a conventional SMPTE type VTR will be explained with reference to FIG.

An example of a SMPTE Type C VTR is NTSC.
In the case of this method, the video signal from the 15th line of the first field to the first half of the 4th line of the second field is recorded on one inclined track, and the video signal is recorded on the next adjacent inclined track. I tried to record from the second half of the 14th line in the second field to the 4th line in the first field. or,
In the case of the NTSC system, there is a phase shift of 2.5H (where H is the horizontal period) between video signals recorded on adjacent inclined tracks. Furthermore, assuming that the vertical blanking periods of the first and second fields of the video signal are the 1st to 20th lines, the 10th line period from the 5th line to the 14th line of the vertical blanking period in the 1st field, In the third field, 10 of the vertical retrace period from the second half of the 4th line to the first half of the 14th line.
Line periods are not recorded on the slope track.

Generally, in a VTR, when a magnetic tape on which a video signal has been recorded is played back at a speed different from that at which it was recorded, the rotating magnetic head scans diagonally across parallel inclined tracks. For example, when performing slow, still, or reverse playback of a magnetic tape on which video signals have been recorded with the rotating direction of the rotating magnetic head and the running direction of the magnetic tape being opposite to each other, the reproduced video signal The frequency of is lower than the frequency of the video signal at the time of recording, that is, the video signal is expanded in time, so the missing section of each field of the reproduced video signal is 10
It will spread further than the line. This point is the first
This will be explained with reference to the figures.

In Fig. 1, the horizontal axis X-X' is the tape running speed (however, the standard speed is 1), and the vertical axis Y-Y' is the relative phase of the video signal reproduced from the magnetic tape (however, 2.5 (H is 1). Here, an example will be explained in which recording is performed by running a magnetic tape at three times the standard speed, and reproduction is performed by running the magnetic tape at a speed lower than the standard speed.

The straight line _ox0 is the state in which the rotating magnetic head is tracking at the starting point of the inclined track during reproduction,
The graph shows the relationship between the tape running speed and the point at which the reproduced output is finally lost when the inclined track is scanned using dynamic tracking. That is, the broken line x ₀ -o-X' and the broken line X-o-
x ₀ ′ indicates the expansion and contraction of the reproduced video signal at each tape running speed, respectively.

In addition, in a normal dynamic tracking system, in order to minimize the swing width of the rotating magnetic head, the broken line x ₀ -o-X' and the broken line x ₀ '-o-
Each area of X is converted into each area of broken line A ₁ -o-B ₁ and broken line A ₂ -o-B ₂ so as to be symmetrical with respect to the horizontal axis X'-X. And the straight line o
-B ₁ and straight line o-A ₁ are design centers for the beginning and end of impact, respectively, on the inclined track of the rotating magnetic head. The area indicated by the broken line A ₁ -o-B ₁ is a non-reproducible area.

In addition, the straight line V ₁ -V ₁ ' and the straight line V ₂ -V ₂ ' parallel to the horizontal axis The straight line V ₃ −V ₃ ′ and the straight line V ₄ −V ₄ ′ are the end point and start point of the video period of the video signal, respectively.

When ideal jump processing is performed during playback at a tape running speed different from that during recording, the rotational phase of the capstan is continuous and the jump conditions for maintaining tracking are 1 pitch (=2.5H).
Considering that it is an integer multiple _of
The end of contact with the tape will be in the area between −a ₁ ′ and straight line _a 2 −a ₂ ′, and the beginning of contact with tape will be between straight line b ₁ −b ₁ ′ and straight line b ₂ −b ₂ ′. .

Therefore, when performing normal signal processing and conforming to the SMPTE Type C format, in the case of triple-speed recording, when playing back by running the magnetic tape at approximately 1.6 times the standard speed, the vertical It becomes difficult to reproduce the end portion of the blanking period, and when playback is performed at approximately 0.8 times the speed, the end portion of the video period of the video signal begins to be lost.

From the above considerations, it can be seen that in the case of a magnetic tape recording at 3x speed, playback at speeds below 1.6x is impossible.

Purpose of the Invention In view of the above, the present invention proposes a video signal reproducing device that can reduce the number of missing sections of the video signal to a practically acceptable level even when the video signal is reproduced at a slower tape speed than at the time of recording. This is what I am trying to do.

Summary of the Invention The present invention provides a video signal that reproduces a video signal recorded on a recording track of a recording medium by driving a rotating magnetic head with an electro-mechanical transducer and displacing it in a direction substantially perpendicular to the scanning direction. In a reproducing device, when reproducing a recording medium on which a video signal has been recorded at a speed different from that at the time of recording, the rotating magnetic head is displaced asymmetrically with respect to the neutral point, and the displacement jump amount J (integer) becomes {2 /3(X-N)+1/2+J}p≧Vd> {2/3(X-N)-1/2+J}p (where, X is the ratio of the tape running speed during playback to the standard speed, and N is the recording speed The ratio _of the tape running speed to the standard speed at _d and N each have a horizontal period H as a unit.) A control circuit is provided to control the electro-mechanical conversion element so as to satisfy the following.

According to the present invention, it is possible to obtain a video signal reproducing apparatus that can reduce the number of missing sections of the video signal to a practically acceptable level even when the video signal is reproduced at a tape speed considerably lower than that at the time of recording.

Example An example of the present invention will be described below. This example is for a SMPTE type C VTR similar to the one described above, in which a magnetic tape on which video signals are recorded at a tape running speed three times the standard speed is run at a slower speed, and the recorded video is Consider the case of reproducing a signal.

Even if a magnetic tape with video signals recorded at a tape running speed three times the standard speed is played back in a stationary state,
Let us consider how to prevent a video section of a recorded video signal from being dropped.

Therefore, as shown in Figure 2, the straight line A ₁ in Figure 1
A straight line _A3 -o- _A4 is provided instead of -o- _A2 , and a straight line _B3 - _o - _B4 is provided instead of the straight line B1-o- _B2 in FIG. Straight line A ₃ -o-A ₄ passes through point o and the point Y=1 on the Y-axis, and straight line B ₃ -o-B ₄ passes between point o and Y on the Y-axis.
= -2 and these become asymmetrical with respect to the X axis.
Thus, the straight line o-B ₃ and the straight line o-A ₃ are the design centers of the beginning and end of the contact, respectively, with respect to the inclined track of the rotating magnetic head, and the broken line A ₃ -o-B ₃
The area becomes a non-renewable area.

When ideal jump processing is performed during playback at a tape running speed different from that during recording, the rotational phase of the capstan is continuous and the jump condition to maintain tracking is 1 pitch (=2.5H).
Considering that it is an integer multiple _of
The end of contact with the tape will be in the area between −a ₃ ′ and straight line _a 4 −a ₄ ′, and the beginning of contact with tape will be between straight line b ₃ − b ₃ ′ and straight line b ₄ − b ₄ ′. .

In this way, even if a video signal is reproduced from a magnetic tape in a stationary state, there will be no dropout in the video section. Next, consider the graph in FIG. When playing the tape at three times the standard speed, if tracking is done correctly, the vertical synchronization signal (including other predetermined phase signals during the vertical retrace interval) in the reproduced video signal ) matches the phase of the reference vertical synchronizing signal (also includes other predetermined phase signals during the vertical retrace interval), and if the tape running speed approaches the straight line a ₃ − a ₃ ', the reproduction vertical synchronizing signal The phase is delayed and linear with respect to the reference vertical synchronization signal
If it approaches a ₄ −a ₄ ', the phase of the reproduced vertical synchronization signal will lead with respect to the reference vertical synchronization signal. and,
The phase difference between the reproduced vertical synchronizing signal and the reference vertical synchronizing signal and the tape running speed are detected, and if the point is between the straight lines _b3 - _b3 ' and _b4 - _b4 ', the rotating magnetic head The position on the magnetic tape remains the same, and then the reproduction vertical synchronization signal is generated by straight lines a ₃ − a ₃ ′ and a ₄
It will fall between −a ₄ ′.

Similarly, if the above-mentioned point is within one pitch above the straight line b ₃ -b ₃ ', then if the rotating magnetic head is displaced in the positive direction by one pitch of the track, the magnetic tape of the rotating magnetic head will be The beginning of the hit is straight line b ₃
It will fall between −b ₃ ′ and b ₄ −b ₄ ′.

Therefore, if the tape running speed during recording is three times the standard speed, the phase difference (in units of horizontal period H) of the reproduced vertical synchronization signal with respect to the reference vertical synchronization signal
V _d is the tape running speed during playback,
3.5H), and if the jump amount of the rotating magnetic head is J (an integer where the leading direction is positive and the lag direction is negative), then the following relational expression holds true regarding the phase difference V _d .

(2/3X-3/2+J)p≧V _d > (2/3X-5/2+J)p...(1) Also, if the tape running speed during recording is N times the standard speed, formula (1) is expressed as the following equation.

{2/3(X-N)+1/2+J}p≧Vd> {2/3(X-N)-1/2+J}p...(2) Also, in this case, point o in Figure 2 is X on the X axis
= Straight line A ₃ − _{A 4} , a ₃ − a ₃ ′, a ₄ so that it comes to the point N
−a ₄ ′ and the straight lines B ₃ −B ₄ , b ₃ −b ₃ ′, and b ₄ −b ₄ ′ may be translated in parallel.

When the above-mentioned equation (1) is transformed with respect to J, the following equation is obtained.

V _d /P-2/3X+5/2>J≧V _d /p-2/3X+
3/2...(3) Therefore, J corresponds to the value of V _d /p-2/3X+5/2 calculated and rounded down. Further, the phase difference V _d /p is 0 when the tape running speeds during recording and playback are equal, negative when the playback speed advances, and positive when the playback speed is delayed. Thus, J can be expressed as follows.

J=INT( _Vd /p-2/3X+5/2)...(4) However, INT is a function meaning an integer. In Figure 3, J is -1, 0, 1, 2, 3, 4, 5, respectively.
A group of straight lines representing the relationship between X and V _d is shown when .

The circuit for determining J in the above equation (4), ie, the control circuit for controlling the bimorph, will be explained with reference to FIG. In SMPTE type C VTR,
A tape is wound around a tape guide drum, and the reproduced FM modulated video signal from one rotating magnetic head 1 provided on the tape guide drum is FM demodulated via a head amplifier 2, a rotary transformer 3, and an equalizer 4. The signal is supplied to the receiver 5 and demodulated. This demodulated output is supplied to a video circuit system (not shown), and is also supplied to a sync separation circuit 6 - a vertical sync separation circuit 7.
Vertical synchronization signal (actually a signal at the beginning of the vertical retrace period, e.g. the equalization pulse)
_VPB is separated and supplied to the phase comparator circuit 8.

On the other hand, the reference video signal from the input terminal 9 is supplied to the synchronization separation circuit 10 - the vertical synchronization signal separation circuit 11 to generate a vertical synchronization signal (corresponding to the above, a signal at the beginning phase of the equalization pulse in the vertical blanking period). ) V _ref is separated and supplied to the phase comparator circuit 8.

The signals V _PB and V _ref are supplied to a phase comparator circuit 8 for phase comparison, and the comparison output is sent to a level adjuster 12.
The phase difference output V _d /p obtained by adjusting the level is supplied to the adder 13 .

A frequency signal generated as the capstan rotates is supplied from the input terminal 14 to a tape running speed detection circuit 15, and this detection output is supplied to a level adjuster 16 for level adjustment, resulting in a tape speed detection signal. -2/3X is supplied to adder 13. Further, the constant signal 5/2 from the constant signal generating means (DC power supply) 17 is supplied to the adder 13.

The addition output (V _d /p-2/3 The signal is supplied to the bimorph drive circuit 19. 2
0 is a bimorph (electro-mechanical conversion element) driven by this drive circuit 19. and,
This bimorph 20 causes the above-mentioned rotating magnetic head 1 attached thereto to be displaced in a direction substantially perpendicular to the scanning direction of the magnetic tape.

Although not shown in the figure, if the reproduction vertical synchronizing signal is missing, V _d becomes V _d = (2/ 3X-2) Give an offset to the bimorph 20 so that p, and close the control loop.

Next, a specific circuit of the above-mentioned phase comparison circuit 8 will be explained with reference to FIG. Connect the input terminal of amplifier A to point Z. Point Z is connected to the power supply +B (+12V) through a series circuit of an on/off switching element _SW1 and a constant current circuit (constant current is defined as i) _IK1 . Further, this point Z is connected to the current -B through a series circuit of another on/off switching element _SW2 and a constant current circuit (constant current is defined as i) _IK2 . Further, point Z is connected through a parallel circuit of capacitor C and on/off switching element _SW3 .

CK is a control circuit that generates a control signal to control on/off of the on/off switching elements SW ₁ and SW ₂ . This control circuit CK is supplied with the above-mentioned reference and reproduction vertical synchronizing signals V _ref and V _PB (FIG. 6A and C), and control signals V ₁ and V ₃ for controlling the switching elements SW ₁ and SW ₂ , respectively. , V ₁ and V ₃ are created.

The monostable multi- _valve generator (rotation
CK) to form a pulse V ₁ (FIG. 6B) having a time width corresponding to the phase detection width T ₁ .
The other monostable _{multivibrator} (circuit
CK) to form a pulse V ₂ (FIG. 6D) having a time width of 1/2 of the phase detection width T ₁ . A monostable multivibrator (in circuit CK) is driven at the falling timing of this pulse V ₂ to obtain a pulse V ₃ (FIG. 6E) with a sufficiently large time width T ₄ .
Furthermore, another monostable multivibrator is driven at the falling timing of this pulse _V3 , and the fifth monostable multivibrator is activated.
A reset pulse V _rs (FIG. 6F) is generated to temporarily turn on the switching element SW ₃ shown in the figure.

Then, by supplying pulse V ₁ and pulse ₃ , which is the phase-inverted version of pulse V ₃ , to the AND circuit (in circuit CK), pulse V ₁ · ₃ of time width T ₂ is generated.
(Fig. 6G) is obtained, and the switching element of Fig. 5 is obtained.
Turn SW ₁ on during its high level.

Also, pulses V ₁ and V ₃ can be connected to another AND circuit (circuit
CK), a pulse V ₁ ·V ₃ (FIG. 6H) with a time width T ₃ is obtained, and the switching element SW ₂ of FIG. 5 is turned on during its high level period.

Therefore, during period T ₂ of pulses V ₁ and ₃ , capacitor C (its capacity is c) operates as a constant current circuit.
Charged by the constant current i from IK ₁ , the voltage V _c between the terminals of the capacitor C reaches from V _c = 0 to V _c = i/c T ₂ during the period T ₂ of the pulse V ₁ · V ₃ At , capacitor C is discharged with constant current i from constant current circuit _IK2 , and the terminal voltage of capacitor C is V _c
decreases from V _c =i/cT ₂ to V _c =i/c(T ₂ −T ₃ )≡V _dif .

Therefore, this voltage V _dif is proportional to the phase difference between the signals V _ref and V _PB . Note that when there is no phase difference between the signals V _ref and V _PB , T ₂ =T ₃ and the voltage V _dif becomes zero. Then, by multiplying this voltage V _dif by a coefficient determined by the amplifier A and the level adjuster 12 of FIG. 4, the above-mentioned phase difference detection voltage
V _d /p is obtained.

Incidentally, the charge in the capacitor C is discharged by turning on the switching element _SW3 by the reset pulse _Vrs to prepare for phase difference detection in the next cycle.

Next, referring to FIG. 7, a specific circuit of the tape running speed detection circuit 15 shown in FIG. 4 will be described.

FG ₁ and FG ₂ (Fig. 8 A and B) are rectangular wave signals having a phase difference of 90° from each other that are generated as the capstan rotates, and these signals FG ₁ and FG ₂ are supplied to the signal processing circuit 21. be done. In this circuit 21, as shown in FIG. 8 C to F, pulses are generated corresponding to the falling and rising timings of the signals FG ₁ and FG ₂ , respectively.
P ₁ to _{P 4} are generated by a differentiating circuit and a waveform shaping circuit, and by adding these pulses P ₁ to _{P 4} , a pulse P (the pulse P with a frequency four times the frequency of the signals FG ₁ and FG ₂ ) is generated. Figure 8G) is obtained. This pulse P is supplied to a monostable multivibrator 22 to make the time width constant, and then the obtained pulse P' is supplied to a low-pass filter 23 to obtain a DC signal E _SP . This DC signal E _SP has a level proportional to the rotational speed of the capstan, that is, the tape running speed.

This DC signal E _SP is passed through a positive phase and negative phase amplifier 24,
25, and each output is sent to a selector switch 26.
After being switched by , it is outputted to output terminal 29 via amplifier 28 . The changeover switch 26 selects the output of the D-type flip-flop circuit 27 according to the rotational direction of the capstan, that is, the running direction of the tape.
Switching is controlled by _PSW (Fig. 8H). This D-type flip-flop circuit 27 has a signal FG1 at its clock input terminal and a signal _FG1 at its D input terminal.
FG ₂ are respectively supplied to produce the above-mentioned control signal P _SW .

Here, the switch 26 is changed so that the output of the negative phase amplifier 25 is supplied to the amplifier 28 when the signal P _SW is at a high level, and the output of the positive phase amplifier 24 is supplied to the amplifier 28 when the signal P SW is at a low level. Then, by adjusting the level of the output voltage obtained at the output terminal 29 by the level adjuster 16 shown in FIG.
The above-mentioned output -2/3X is obtained.

According to the video signal reproducing apparatus described above, even if the video signal is reproduced at a tape speed that is considerably slower than the recording speed, the missing section of the video signal can be reduced to a practically acceptable level.

Next, an example of a video signal recording device for producing a recorded tape used in the video signal reproducing device described above will be described with reference to FIG. This recording device uses an imaging device that scans at a scanning speed three times the scanning speed of a standard NTSC television signal.

The subcarrier frequency, horizontal frequency, vertical frequency, and frame frequency of this imaging signal are respectively f″ _SC ,
Assuming f″ _H , f″ _V , f″ _FR , these are expressed as follows.

f″ _SC = 910/4f′ _H = 10.7 (MHz) f″ _H = 525/2f′ _V = 47.25 (KHz) f″ _V = 180° (Hz) f″ _FR = 1/2f′ _V = 90 (Hz) ) 31 is an imaging device, which includes an imaging tube, an imaging device such as a solid-state imaging device, driving means for the imaging device, a signal processing circuit, etc., and here also includes an encoder for obtaining an NTSC system composite color imaging signal. There is. However, such an encoder
Later-stage signal processing circuit system (for example, D/A
It can also be provided at the next stage of the converter.

The composite color imaging signal from the imaging device 31 is A/
The signal is supplied to a D converter 32 and digitized.
33 receives the imaging signal from the imaging device 31;
This is a synchronization separation circuit that separates various synchronization signals. A color framing signal from the imaging device 31 and horizontal and vertical synchronization signals from the synchronization separation circuit 33 are supplied to a clock signal generation/system control circuit 34. A clock signal of frequency f' _W-CK from this circuit 34 is, for example, 4f' _SC {=71.6 (MHz)}.
A converter 32 is provided. A control signal from the circuit 34 is also supplied to a fixed magnetic head 36 via an amplifier 35 to generate a magnetic tape (not shown).
recorded on the lateral edge of

The digitized image signal from the A/D converter 32 is supplied to the field memories M (M- ₁ to M-6) via on/off switches S1 to _S6 , respectively, and the data at the write frequency f' _W-CK is Written with rate. Field memory M-1, M-4; M-2,
M-5; Read frequency f _R-CK from M-3 and M-6
The digitized image signals read out at a data rate of (=1/3f' _W-CK
D/A conversion switching DA-1 through _S11 to _S13 respectively
The signal is supplied to DA-3 and subjected to D/A conversion using a clock signal having a read frequency fR _-CK . Analog imaging signals VID-1 to VID-3 obtained from D/A converters DA-1 to DA-3 are supplied to FM modulators (carrier frequency is three times the standard value) MD-1 to MD-3. The obtained FM modulated imaging signals VID-1 to VID-3 are sent to amplifiers _A1 to _A3, respectively.
The tape is wound through three rotating magnetic heads placed at 120° intervals on the tape guide drum.
The signals are supplied to H _A to H _C and recorded on the magnetic tape so as to form successive adjacent inclined tracks. In this case, by making the diameter of the tape guide drum slightly smaller than the standard, it is possible to form an inclined track on the magnetic tape that conforms to the SMPTE Type C format.

In addition, FM modulators MD-1 to MD-3 have video level, carrier frequency (frequency 3 times the standard value),
It has means for adjusting deviation, DG, DP, frequency characteristics, etc., thereby making it possible to match the characteristics of each channel.

Next, the operation of the apparatus shown in FIG. 9 will be explained. 10th
In the figure, T ₁ , T ₂ , T ₃ . . . indicate field periods, each having a time width T (=1/f″ _V ).

Now, during the period _T1 , only the switch _S1 is made, and the digitized image signal is written into the memory M-1. Next, in the field period _T2 , only the switch _S2 is made, and the imaging signal is written into the memory M-2. Thereafter, similarly, imaging signals are sequentially written into each of the memories M-3 to M-6.

Then, during the field period _T4 , the switch _S11 is made to the fixed contact a side, and the image pickup signal written in the memory M- ₁ during the field period T1 is
W _1N begins to be read. Since f _R-CK = 1/3f' _W-CK , read out the imaging signal W _1N and use the readout signal
Three field periods T ₄ to _{T 6} are required to obtain R _1N .

Similarly, in field period _T5 , memory M
-2 imaging signal written in field period T ₂
W _2N begins to be read. Similarly, three field periods _T5 to _T7 are required to read out the imaging signal _W2N and obtain the readout signal _R2N . Thereafter, proceed in the same manner, and switch S ₁₁ in field period T ₁₁ .
is made to the fixed contact b side and starts reading the image signal W _4N from the memory M-4 to obtain the read signal R _4N . Therefore, the written digital image signal
When W _1N , W _2N . . . are controlled to be one field from the beginning of each field, the read image signals R _1N , R _2N . . . are read from the beginning of each field, D/A converter DA-1 to DA-
Three-phase imaging signals are outputted to the analog imaging signals VID-1 to VID-3 from VID-3 with a phase interval of 1/ _f''V = 1/31/ _fV .

Also, focusing on the image pickup signal VID-1, this consists of image pickup signals R _1N →R _4N →R _1(N-1) →... which are read out sequentially. Now, if W _1N is the first field imaging signal of the NTSC system, W _2N is the second field imaging signal, ... W _4N is the fourth field imaging signal,
W _5N is the first field imaging signal, W _6N is the second field imaging signal, and so on. Therefore, the imaging signal VID-1 is the imaging signal R _1N (first field)
→R _4N (4th field) →R _1(N+1) (3rd field) →R _4(N+1) (2nd field) →R _1(N+2) (1st field)... Color framing is broken. Therefore, when performing NTSC color encoding after the D/A converter, the image signal R _4N
(4th field), R _4(N+1) (2nd field)...
must invert the phase of the carrier color signal. The same applies to the imaging signals VID-2 to VID-3. Therefore, in this case, if the NTSC color encoder in the imaging device 31 is provided at the subsequent stage of the D/A converter, each color encoder can be used to finally obtain the NTSC composite color image signal. By providing a means for inverting the phase of the carrier color signal, signals with apparently distorted color framing are generated as the imaging signals VID-1 to VID-3.

Effects of the Invention According to the present invention described above, there is obtained a video signal reproducing device that can reduce the missing section of the video signal to a practically acceptable level even when the video signal is reproduced at a tape speed considerably lower than that at the time of recording. be able to.

[Brief explanation of the drawing]

FIG. 1 is a graph for explaining a conventional video signal reproducing device, FIGS. 2 and 3 are graphs for explaining a video signal reproducing device according to the present invention, and FIG. 4 is a graph for explaining a video signal reproducing device according to the present invention. 5 is a circuit diagram showing a specific configuration of a part of the circuit of the device shown in FIG. 4, FIG. 6 is a waveform diagram for explaining the circuit shown in FIG. 5, and FIG. FIG. 4 is a circuit diagram showing the specific configuration of some other circuits of the apparatus, FIG. 8 is a waveform diagram for explaining the circuit in FIG. 7, and FIG. 9 is for obtaining a recorded tape used in the present invention. Block diagram showing an example of a video signal reproducing device for
FIG. 0 is a diagram showing write and read timings of the memory for explaining the device of FIG. 9. 1 is a rotating magnetic head, and 20 is an electro-mechanical conversion element.

Claims (1)

[Claims] 1. A video signal that reproduces a video signal recorded on a recording track of a recording medium by driving a rotating magnetic head with an electro-mechanical transducer and displacing it in a direction substantially perpendicular to the scanning direction. In the reproducing device, when reproducing the recording medium on which the video signal is recorded at a speed different from that at the time of recording, the rotating magnetic head is displaced asymmetrically with respect to the neutral point, and a displacement jump amount J (integer) is generated. is {2/3(X-N)+1/2+J}pV _d > {2/3(X-N)-1/2+J}p {where, X is the ratio of the tape running speed during playback to the standard speed, _N is the ratio of the tape running speed during recording to the standard speed, A video signal reproducing device comprising: a control circuit that controls the electro-mechanical conversion element so as to satisfy the phase difference (in units of horizontal period H) of recorded video signals.