JPH0757022B2 - Video signal recorder - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a video signal recording device.

Background art and its problems In the VTR, there has been a long-standing need to freely change the tape running speed to freely reproduce slow motion and fast motion images, and many inventions have been made in response to this. It has been. Among them, according to the dynamic tracking technology proposed by the applicant of the present invention, various variable speed reproduction images can be obtained by performing variable speed reproduction at an arbitrary tape running speed.

However, considering the degree of freedom on the recording side of the VTR by turning our eyes, it is the current state that there is almost no degree of freedom in operating the time. For example, when recording a short recording part on a one-shot basis and attempting to create a storage tape of continuous video signals by combining them, the conventional VTR electronic editing method, that is, the method of assembling and inserting is used. There was no choice but to do it. This naturally requires complicated processes such as pre-roll (rewind), phase adjustment (address matching), framing (servo lock), and review (check reproduction).

That is, for example, in order to realize the recording of a video signal of one frame, it is necessary to reciprocate the tape for several seconds or more, which increases mechanical stress on the tape, or at least 10 seconds or more. The required time loss was inevitable. Due to this limitation, under the present circumstances, for example, when synthesizing recording of each frame of a video signal over a length of 10 seconds, if the VTR color frame phase adjustment time and the minimum preroll time are each set to 5 seconds, the tape Suffers passage stress more than 600 times and requires a recording time of about 2 hours.

A further problem is that if a recording command is issued with the intention of recording a certain part of the video signal, it will not be possible to start recording immediately, and it will take several seconds to several tens of seconds. It is no exaggeration to say that I can hardly do it.

Therefore, it has been very difficult to use a VTR for creating a master tape of a video disc that has been put into practical use in recent years, creating an animation image, or creating a still image file. Has been a major obstacle to its use for these purposes.

On the other hand, some types of VTRs have been proposed and made in the past, which try to record a video signal on a tape at a special tape running speed and recording timing even if the quality of the recorded image is considerably poor. One of them is the rapid tape drive recording method that has been used in portable VTRs for consumer use. Rather, circuits for phase adjustment, address matching, etc. are omitted, and a recorded image somehow similar to a regular edited image is obtained. This is a system in which, after receiving a recording command, for example, a rotary capstan or the like is instantly pressure-bonded to the tape so that the tape speed rises rapidly to a standard speed and recording is performed immediately.

However, this method naturally makes it impossible to record with high accuracy in terms of tape tension fluctuations and speed fluctuations.
It can be said that this method does not go beyond the simple type due to image dropout, phase shift, image quality deterioration, etc.

The other is a method that is often used in so-called surveillance VTRs. This is, for example, a stepper motor is used to drive the capstan, and intermittent recording is performed while the tape is driven intermittently, but at the same time, the movable tape guide or drum shaft moving mechanism is used to correct the recording angle. It is something to do.

This method is difficult to maintain mechanical or structural accuracy, but has an even more essential problem. That is, it lacks the considerations and means to make the tilted track pattern perfectly equivalent to the standard tape speed, so the resulting tilted track pattern is not the standard tilted track pattern. It becomes another thing.

However, as far as the VTR is used for monitoring, it is sufficient if the reproduced image can be seen especially when an abnormality occurs.
In many cases, accuracy, image quality, and standards are not required, which is why it is put to practical use.

OBJECTS OF THE INVENTION In view of the above, the present invention has a correct color framing continuity on a tape running at an arbitrary tape speed lower than a standard tape speed, and a predetermined track pattern is formed on the tape. As described above, the present invention intends to propose a video signal recording device capable of surely recording a video signal.

SUMMARY OF THE INVENTION The present invention provides a speed command signal in a video signal recording apparatus for recording a video signal so that an inclined track is formed on a tape by using a rotary magnetic head that can be displaced in a direction substantially orthogonal to a scanning direction. Based on the tape drive speed control circuit that allows the tape speed to run at an arbitrary speed lower than the standard speed, and a control signal prerecorded on the tape for indicating the reference of the position on the tape forming the inclined track. A position detection circuit that generates a position detection signal indicating the tape traveling position, a time axis expansion / contraction processing circuit that expands / contracts the time axis of the input video signal according to the tape running speed, and a time signal according to the control signal. A recording amplification circuit that supplies the video signal output from the axis expansion / contraction processing circuit to the rotary head,
The video signal from the recording amplifier circuit is recorded so that a tilted track with the same tilt as the tilted track formed on the tape running at the standard speed is formed on the tape running at an arbitrary speed according to the running speed of the tape. Based on the output of the position detecting circuit and the discriminating circuit, the head control circuit for controlling the displacement of the rotary head, the discriminating circuit for discriminating the odd-even information and the color framing information of the field of the input video signal A video signal to be recorded so as to form an inclined track is discriminated which video signal should be recorded on the tape so as to maintain the continuity of color framing, and a control signal for controlling the recording timing of the video signal to be recorded is formed. And a recording timing control circuit.

According to the present invention, a standard formed on a tape having correct color framing continuity on a tape running at an arbitrary tape speed lower than the standard tape speed and running on the standard tape speed. So that the same track pattern as the track pattern of is formed on the tape,
It is possible to obtain a video signal recording device capable of surely recording a video signal.

Embodiment An embodiment (an example of an SMPTE type C-type VTR) of the present invention will be described in detail below with reference to FIG. (1) is a magnetic tape, which is wound around the tape guide drum (2) at an angle of Ω and guided. A control signal is recorded in advance on the side edge of the tape (1). This wrapping angle is close to 360 °. The winding state of the tape (1) with respect to the tape guide drum (2), that is, the winding inclination and the winding angle are regulated by the pair of inclined guide pins (5) and (6).

The tape guide drum (2) comprises a rotating upper drum (3) and a fixed lower drum (4). (7) is a single rotating magnetic head, which is an electro-mechanical conversion element (8) such as a bimorph.
It is displaceable in a direction substantially orthogonal to the scanning direction by being attached to the rotating upper drum (3) via the. The rotary head (7) records one field of the video signal on the magnetic tape (1) for each inclined track. Reference numeral (9) is a drum motor for rotationally driving the upper rotating drum (3), which is attached to the drum (3) via a shaft (10).

(11) is a control magnetic head (winding type magnetic head). (12) is a capstan, and (13) is a capstan motor that rotationally drives the capstan (12). (14) is the capstan (12) through the tape (1)
It is a pinch roller that is in contact with. The tape (1) is sandwiched between the capstan (12) and the pinch roller (14), and the two rotate, so that the tape (1) moves at an arbitrary traveling speed corresponding to the rotation speed of the motor (13) by an arrow α. Be driven in the direction. In the case of the double capstan system, the tape (1) can be run in both forward and reverse directions at an arbitrary running speed.

(15) is a time axis expansion / contraction processing circuit, to which an input terminal (16)
An input video signal from is supplied. This circuit (16) receives the vertical sync signal (NT) from the input video signal (video signal that has not been expanded / contracted on the time axis) supplied to the input terminal (16).
Synchronous separation circuit (15a) that separates 60Hz in the case of SC method
Is included.

(17) is a servo circuit for the drum motor (9). The drum motor (9) includes a signal generator (a magnetic pole (magnetized magnet wheel)) that generates a frequency signal and a phase signal generated in accordance with the rotation of the motor (9), that is, the rotating drum (3). A magnetic head (for example, a thin film type magnetic flux detection head) is provided, and these signals are supplied to the servo circuit (17). Further, the servo circuit (17) is supplied with a vertical sync signal from the sync separation circuit (15a) of the processing circuit (15), so that each signal from the signal generator of the drum motor (9) is sure to be the vertical sync signal. The rotation of the drum motor (9) is controlled by the servo circuit (17) so that the rotation is locked. In this case, the rotation of the rotating drum (3) does not fluctuate with the running speed of the tape (1).

(18) is an input terminal of a speed command signal for instructing the running speed of the tape (1), which is generated by an operator operating a push button or the like of the speed controller, and this speed command signal is a microprocessor. (19) and the tape running speed control pulse generator (20), and each is controlled. The pulse from the pulse generator (20) is supplied to the servo circuit (21) for the capstan motor (13). Further, the control signal from the microprocessor (19) is supplied to the pulse generator (20).

Reference numeral (22) is a position detector for detecting the running position of the tape (1) (running position in the longitudinal direction of the tape), and reproduction is performed by superimposing color frame information from the control magnetic head (11) on the position detector. A frequency signal generator that is provided in the control signal and the capstan motor (13) and generates a frequency signal according to the rotation of the motor (13), that is, the capstan (12) Magnet wheel) and magnetic head (eg thin film type magnetic flux detection head)
And the frequency signal from the position detection circuit (2
2) Supplied to. In this position detection circuit (22), the rough traveling position of the tape (1) is controlled by the control signal, that is, if the color sequence of the video signal to be recorded is 4 fields, it corresponds to the inclined track of what field. Is detected, and the fine traveling position of the tape (1), that is, the position between the inclined tracks is detected by the frequency signal. The position detection signal from the position detector 22 is supplied to the microprocessor (19) and the servo circuit (21).

The time axis expansion / contraction processing circuit (15) receives the frequency signal from the frequency signal generator of the capstan motor (13),
The time axis expansion / contraction process of the video signal is performed according to the frequency, and the phase correction of the entire video signal is performed based on the error signal from the capstan servo circuit (21). This time axis expansion / contraction processing circuit (15) is
The running direction of the magnetic tape (1) and the rotating direction of the rotary head (7) in the VTR are respectively indicated by an arrow α in FIG. 2 (A).
In the case of β, the inclined track T ′ at the low tape speed having the same start end as the inclined track T formed on the tape (1) running at the standard tape speed is the tape (1).
The lower the speed of, the shorter the tilted track T at the standard speed, so the video signal is expanded, and the direction of rotation of the rotary head (7) is changed as shown in FIG. 2 (B). The arrow remains β, but when the tape running direction is opposite to the direction of the arrow α as shown by the arrow α ′, the inclined track T formed on the tape running at the standard tape speed and the start end are the same. Since the inclined track T'at the low tape speed becomes longer than the inclined track T at the standard speed as the tape speed becomes lower, the video signal is compressed.

That is, in the case of FIG. 2 (A), the tape (1) in which the rotary head (7) runs at a speed lower than the standard tape speed.
When the upper tilted track T'is scanned from the start end P to the end Q and a video signal for one field is recorded for 1/60 seconds, the rotary head (7) runs on the tape (1) running at the same degree. The point Q'after 1/60 seconds has elapsed from the start of the scanning of the tilted track T at the standard speed of 1), is the same as before the end R of the tilted track T. Therefore,
To record one field of the video signal by scanning the inclined track T at a standard speed on the tape (1) running at the same speed by the rotary head (7) to record one field of the video signal, Depending on the time required for the head (7) to scan from the starting end P to the ending end R of the inclined track T (longer than 1/60 second, time corresponding to the running speed of the tape (1)),
The video signal needs to be expanded by the time axis expansion / contraction processing circuit (15).

In the case of FIG. 2 (B), the rotary head (7) scans the inclined track T'on the tape (1) running at a speed lower than the standard tape speed from the starting end P to the ending Q,
When recording a video signal for one field over 1/60 seconds, the rotary head (7) started to scan the inclined track T at the standard speed on the tape (1) running at the same degree from the starting end P. After that, the point Q ′ after 1/60 seconds has passed is on an extension line past the end R of the tilted track T. Therefore, in order to record one field of the video signal by scanning the inclined track T at the standard speed on the tape (1) running at the same speed by the rotary head (7) from the start end P to the end R. , According to the time required for the rotary head (7) to scan from the start end P to the end R of the inclined track T (shorter than 1/60 second, time corresponding to the running speed of the tape (1)),
It is necessary to compress the video signal by the time axis expansion / contraction processing circuit (15).

(23) gives a drive signal from the output terminal (24) to the electro-mechanical conversion element (8) to which the rotating magnetic head (7) is attached, so that the head (7) is in a direction substantially orthogonal to the scanning direction. It is a head drive circuit for displacing. The head drive circuit (23) receives a flyback pulse from the drum servo circuit (17) and produces a triangular-wave drive signal with a fixed phase based on the flyback pulse, and a frequency signal generator for the capstan motor (13). To control the slope of the triangular-wave drive signal according to the frequency, and further to receive the error signal from the capstan servo circuit (21) to control the offset level of the triangular-wave drive signal.

Next, the recording timing control circuit (30) will be described.
Reference numeral (25) is a modulator / converter and a recording amplifier, which receives the video signal from the time-base expansion / contraction processing circuit (15), frequency-modulates this signal, and further amplifies the signal to output terminal (26). Is supplied as a recording signal to the rotating magnetic head (7) through a rotating transformer (not shown). The modulator / modulator and recording amplifier (25) are gate signal generators (2
The gate signal from 7) controls the amplifier to control the recording timing and recording period. The gate signal generator (27) is a microprocessor (19).
Controlled by. (28) and (29) are framing discrimination circuits, of which (28) is an input terminal (processing circuit (1
5) is also possible) Even-odd discrimination circuit that receives the video signal from (16) and discriminates the odd-even of that field, (29) receives the video signal from the input terminal (16) (processing circuit (15) is also possible) Is a color framing discrimination circuit for discriminating the color framing. Then, these discrimination circuits (28),
The discrimination output of (29) is supplied to the microprocessor (19). The microprocessor (19) is also supplied with a vertical sync signal from the sync separation circuit (15a) of the time axis expansion / compression processing circuit (15).

Next, the operation of the video signal recording apparatus of FIG. 1 will be described with reference to FIGS. 2 (A) and (B). The running speed of the tape (1) is lower than the standard speed S _n , that is, 1 / the standard speed S _n .
Consider a case where the video signal from the input terminal (16) is recorded on the tape (1) while traveling at a speed of m. In FIG. 2, (1) shows a magnetic tape similar to that in FIG.
Indicates a control signal recorded on the tape (1) in advance at equal intervals. T indicates an inclined track (shown by a solid line) when the tape (1) is running at the standard speed S _n ,
T'is a standard inclined track T when the tape (1) is running at 1 / m of the standard speed S _n and an inclined track (shown by a broken line) having the same starting end (corresponding to the CTL signal). ) Is shown. Therefore, the loci of the rotary heads (7) between the adjacent inclined tracks T ′ are not shown.

In this video signal recorder (VTR), the running speed of the tape (1) is At this time, the video signal is recorded so that the inclined track T having the same inclination and the same length as the inclined track when the tape (1) is running at the standard speed S _n is formed on the tape (1). I will let you.

Therefore, the running speed of the tape (1) at the input terminal (18) A speed command signal indicating that (m can be arbitrarily selected) is supplied. Thus, the pulse generator (20) generates a pulse having a frequency 1 / m times the frequency F _n of the pulse generated when the tape (1) is at the standard running speed S _n , and this is the capstan servo circuit. Supplied to (21). Thus the tape (1) The capstan (12) and the pinch roller (14) drive the vehicle so that the vehicle continuously travels at the speed of. Running speed of this tape (1) A pulse generator (20) from a microprocessor (19)
It does not change unless a control signal to change the speed is supplied to.

In this case, the capstan is driven and controlled in a certain tape speed range which is lower than the standard recording / reproducing tape speed, and thereby the movement from the position near a certain recorded track to the next adjacent recording scheduled track position is performed. At this time, the tape speed moves to the next track position in a short time, and the tape speed before and after reaching the adjacent track position without overshooting or overshooting the standard track interval is the standard recording / reproducing tape speed. Performs capstan control targeting such a tape speed so that it is possible to reach a constant tape speed (including stationary) that is sufficiently lower than that.

Further, in the time axis expansion / contraction processing circuit (15), the unit signal of the input video signal, that is, one field (note that one frame is acceptable) is just recorded on the tilt track T of FIG. According to the frequency of the output signal of the frequency signal generator of the capstan motor (13), that is, in accordance with the tape running speed, the input video signal is expanded in the case of FIG. 2 (A) and is expanded in FIG. 2 (B). In the case of, the compression is performed and the timing of the arrival of the tilt track T based on the control track CTL on the tape (1) and the timing of the video signal to be recorded on the tilt track T coincide with each other. The phase of the video signal expanded or compressed is controlled by the postan servo circuit (21) based on the error signal.

Further, the head drive circuit (23) is provided with a drum servo circuit (1) so that the head (7) surely scans the tilt track T.
7), controlled by the frequency signal generator of the capstan motor (13) and the capstan servo circuit (21),
Drive the electromechanical conversion element (8). An operation mode in which two continuous tilt tracks are recorded as one unit, that is, a video signal of a field obtained by scanning the tilt track T having a head (7) is recorded, and then the adjacent tilt track is recorded. When scanning T to record a video signal of some other field, a microprocessor (19)
The pulse generator (20) is controlled by this, which makes the running speed of the tape (1) To allow subsequent scanning of the desired tilt track T within the displacement of the head (7). Thus, the tape (1) is controlled in its travel so that it can scan a certain predetermined tilt track T by the possible displacement of the head (7).

In the modulator / converter and the recording amplifier (25), the on / off of the recording amplifier is controlled by the gate signal from the gate signal generator (27), which is controlled by the microprocessor (19). Controlled by the time axis stretch processing circuit (1
The supply / non-supply of the time-axis stretched video signal from 5) to the head (7) is controlled.

When the color video signal is to be recorded on the tape (1), the microprocessor (19) is arranged so that the color video signal is sequentially recorded on each of the tilt tracks T while maintaining the continuity of the color framing. , The color framing of the field video signal from the time axis expansion / contraction processing circuit (15) based on the color framing information from the color framing discrimination circuit (29) each time the vertical synchronization signal from the synchronization separation circuit (15a) arrives ( The repetition of the first to fourth phases) matches the color framing of the field video signal to be recorded at the tape position (the position corresponding to the recording position of the CTL signal) indicated by the position detection signal output from the position detection circuit (22). If there is no match, wait until a matching color framing field video signal is obtained, and then match. Commanding the generation of the gate signal to the gate signal generating circuit (27) when.

Furthermore, when recording a monochrome video signal on the tape (1), the microprocessor (19) determines the odd / even discrimination circuit (28) of the field every time the vertical sync signal from the sync separation circuit (15a) arrives. Based on the odd / even information of the field from the field, the odd / even of the field of the field video signal from the time axis expansion / contraction processing circuit (15) is indicated by the position detection signal at the output of the position detection circuit (22). (The position corresponding to the position), it is determined whether or not it matches the odd / even field of the field video signal to be recorded. If they do not match, wait until the odd / even field video signal of the matching field is obtained, and match. At this time, the gate signal generation circuit (27) is instructed to generate a gate signal.

FIG. 3 and FIG. 4 show that even if the tape velocity and position at the recording instant are arbitrary, it is restored and recorded in a regular pattern by the advanced control of the head height vector P and the signal phase vector Ψ. It is a vector diagram of a place showing that things can be done.

Needless to say, the standard recording velocity vector v _r is a composite vector of the head scanning velocity vector v _h and the tape velocity vector v _t . Assuming that an arbitrary recording velocity vector V _r at an arbitrary position is present, a vector (v _r ) can be obtained by adding the velocity correction vector Δf to this.

On the other hand, the displacement vector Δφ on the tape (1) can be corrected by combining the video signal phase component (ΔΨ) and the track vertical direction movable head displacement amount (ΔP).

Further, as can be seen from FIG. 4, the above-mentioned Δf is ΔP and ΔP.
It is obtained by synthesizing the time derivative of Ψ. Where Δf is Δf
== However, , Is.

Thus, instead of the inclined track T'at a certain speed (lower than the standard speed) of the tape (1), the same inclined track T at that speed as at the standard speed can be formed on the tape (1). it can.

Next, the frictional force of the tape running system will be described. This problem undermines the controllability of tape tension and tape guiding, especially when the tape is stationary or running backwards.

For example, assume that the tape is running in the forward direction in an SMPTE type C VTR. At this time, the distribution T (θ) on the drum can be calculated as follows.

However, T ₀ : Tension at tape entrance μ: Friction coefficient of fixed part θ _max : Full winding angle The moment the tape runs in the opposite direction, tension T
The distribution of (θ) changes completely as in the following equation.

What then happens to the distribution of tensions from the moment the tape stands still to the time it runs in the opposite direction? To put it simply, it can be said that it is a state capable of producing innumerable distribution curves. In other words, when the elastic body that is in contact with the solid friction surface is strained by the frictional force, its strain distribution is free within the range of the maximum strain gradient determined by the equivalent frictional force and the equivalent elastic modulus. This is because it has the property of preserving the distribution state.

For example, the distribution at the moment when the tape stands still belongs to either of the above distribution calculation formulas. However, if one or both of the tensions on the inlet side or the outlet side of the tape drum changes with the stop of the tape running, how will the tension distribution on the way change? However, it is not easy to obtain a new distribution curve that continuously connects the given inlet side, outlet side and tension. It is appropriate to think of this as, for example, that one corner of a sand pile made of free-flowing sand collapses and another sloped portion occurs, and as a result, it is possible to correspond to tensions on both sides.

That is, a continuum whose shape is maintained by solid friction exhibits a just typical hysteresis (history) phenomenon, and thus the shape as a continuum can have infinite uncertainty (diversity). It is as if the sandstone system shows innumerable histories. It is also considered that the hysteresis is canceled by a slight external vibration disturbance or the like, and eventually returns to the ground state in such a manner that the sand pile is flattened.

Therefore, if the tension distribution on the drum surface that is exactly the same as that at standard speed recording is desired, the following conditions must be observed. That is, the direction of friction of the tape should not be changed during or immediately before recording. In order to ensure this, recording must be performed while the tape is running at a low speed, or the tape must be gradually stopped without being overshot, and immediately recorded before tension relaxation occurs.

By the way, it is generally thought that normal recording is unlikely to be possible even when trying to record a signal on a tape during continuous low speed motion, and it was usually thought to choose either standard speed or completely stationary. Conventionally, the idea of recording such a tape while moving it at a low speed has never been proposed, but the present invention makes this possible.

The tape is not limited to running at a constant low speed and may be run intermittently. In this case, in the flow of the signal to be recorded, only a single block section in one field or frame or other signal sequence is recorded. After recording a single block, stop recording immediately or at least provide a pause. Immediately after the recording of at least a series of signal blocks, the capstan drive is commanded to stop, thereby stopping the tape at a distance shorter than the track pitch at the standard speed continuous recording, and the next track at that position. Wait for the command to record.
At the standby position, after waiting in the reproducing or non-recording state, the next track is recorded by the next recording command.

Further, the number of rotating heads (for example, two), the winding angle of the tape with respect to the tape guide drum (for example, 180 °), and the like are not limited to those in the above-mentioned embodiment, and are arbitrary.

According to the video signal recording device described above, a tape having a correct color framing continuity is formed on a tape running at an arbitrary tape speed lower than the standard tape speed, and the tape is formed on the tape running at the standard tape speed. It is possible to reliably record the video signal so that the same track pattern as that of the standard track pattern is formed on the tape.

Effects of the Invention According to the present invention described above, on a tape running at an arbitrary tape speed lower than the standard tape speed, on a tape having correct color framing continuity and running at the standard tape speed. It is possible to obtain a video signal recording device capable of surely recording a video signal so that the same track pattern as the standard track pattern to be formed is formed on the tape.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIGS. 2 and 3 are pattern diagrams showing recording patterns on a tape, and FIG. 4 is a vector diagram. (1) is a tape, (2) is a tape guide drum, (7) is a head, (8) is an electro-mechanical conversion element, (9) is a drum motor, (11) is a control head, (12) is a capstan, (13) is a capstan motor, (14) is a pinch roller, (15) is a time axis expansion / contraction processing circuit, (17) is a drum motor servo circuit, (19) is a microprocessor, (2)
(0) is a pulse generator for controlling tape running speed, (21) is a capstan motor servo circuit, (23) is a head drive circuit, (25) is a modulator / converter and recording amplifier, (28),
(29) is a framing discrimination circuit, (28) is an odd-even discrimination circuit, (29) is a color framing discrimination circuit, (3)
0) is a recording timing control circuit.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Fumiyoshi Abe 4-14-1, Asahi-cho, Atsugi-shi, Kanagawa Soni-Atsugi factory (56) References JP-A-57-79776 (JP, A) JP-A-55-105828 (JP, A) JP-A-55-62532 (JP, A) JP-A-54-25717 (JP, A) JP-A-57-203232 (JP, A) JP-A-59-51681 (JP, A)

Claims (1)

[Claims] 1. A video signal recording apparatus for recording a video signal such that an inclined track is formed on a tape by using a rotary head which is displaceable in a direction substantially orthogonal to a scanning direction, based on a speed command signal. A tape running speed control circuit for running the tape speed at an arbitrary speed lower than a standard speed, and a control signal prerecorded on the tape for indicating a reference of a position on the tape forming the inclined track. A position detection circuit for generating a position detection signal indicating the tape traveling position, a time axis expansion / contraction processing circuit for expanding / compressing the time axis of the input video signal according to the tape traveling speed, and a control signal according to the control signal. The recording / amplifying circuit for supplying the video signal output from the time axis expansion / contraction processing circuit to the rotary head, and the recording / amplifying circuit depending on the tape traveling speed The rotary head so that the video signal from the recording / amplifying circuit is recorded on the tape running at the standard speed so as to form a tilt track having the same tilt as the tilt track formed on the tape running at the standard speed. A head control circuit for controlling displacement of the input video signal, a discriminating circuit for discriminating odd / even information and color framing information in the field of the input video signal, and a sequential inclined track on the tape based on the outputs of the position detecting circuit and the discriminating circuit Forming a control signal for discriminating a video signal to be recorded on the tape so as to maintain the continuity of color framing so that the control signal for controlling the recording timing of the video signal to be recorded is formed. And a recording timing control circuit for controlling the video signal.