JPH0223119B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a color frame servo circuit in an editing recording and reproducing device, and particularly to supplying a PAL color video signal reproduced by an external reproducing device such as a VTR as a recording signal. In an editing recording and reproducing apparatus that performs electronic editing by splicing recording or insert recording at a desired position on a magnetic tape, the field order of the externally input reproduced color video signal to be recorded is recorded. The present invention relates to a color frame servo circuit that records in a regular order according to the field order of a color video signal on an editing side.

Conventional technology Conventionally, a color video signal reproduced by an external reproduction device such as a VTR is supplied as a recording signal, and continuous recording is performed from a desired position on a recorded magnetic tape, or external input reproduction is performed in a desired section. 2. Description of the Related Art Editing recording and reproducing apparatuses are known that perform electronic editing by insert recording color video signals.
When performing electronic editing using such an editing recording and reproducing device, the vertical synchronizing signal phase must be matched at the joint between the externally input reproduced color video signal to be recorded and the already recorded color video signal on the recorded magnetic tape. , and it is well known that a frame servo circuit is provided which performs recording in a continuous manner in frame units. Due to this frame servo circuit, in an editing recording and reproducing device for NTSC color video signals, the vertical synchronizing signal phase is shifted by H/2 (where H is the horizontal scanning period) between odd and even fields due to interlaced scanning. It is possible to prevent the phenomenon in which the top of the playback screen momentarily shakes at the editing point, which occurs when

Problems to be Solved by the Invention However, even in editing recording and reproducing devices applied to PAL color video signals, the above-mentioned frame servo circuit has been conventionally used.
There is a probability of 2 that the color will fly (so-called color flash).
It was occurring at the edit point. In other words, a PAL color video signal is a signal obtained by band-sharing multiplexing a luminance signal and a carrier color signal, respectively, and the carrier color signal is a color subcarrier with color difference signals (RY) and (BY). The modulated wave is obtained by quadrature two-phase modulation of the frequency fsc with carrier suppression, and the color subcarrier of the color difference signal (RY) is phase-inverted for each line (scanning line) (two-line correlation). As is well known.

On the other hand, for interlaced scanning of PAL color video signals, the phase of the vertical synchronization signal of one field and the vertical synchronization signal of the next field is 1/2H.
It's off. Therefore, from the above, in the case of a PAL color video signal, the color difference signal (RY)
The phase relationship between the line-by-line phase inversion of the color subcarrier and the vertical synchronization signal is repeated every four fields.

This will be further explained with reference to FIGS. 1A to 1E. FIGS. 1A to 1E show waveform diagrams near the vertical synchronizing pulse of each field of a PAL color video signal, respectively. In the figures A to E, the arrows indicate the transmission position of the color burst signal, and the upward arrow indicates that the color burst signal has a phase of +135° with respect to the BY axis, and the downward arrow indicates the color burst signal. Indicates that the signal is at a phase of -135° with respect to the BY axis. Figure 1 A, B, C, D are the first,
The signal waveforms near the start positions of the second, third, and fourth fields are shown.
In the fields, the vertical synchronization signals have the same phase, but the color burst signals have different phases (the same applies between the second field and the fourth field). Also,
The vertical synchronizing signal and the color burst signal between the first and third fields and the second and fourth fields are different in phase by ±135° with respect to the BY axis.

However, the field following the fourth field is as shown in Figure 1E, and each phase of the vertical synchronization signal and color burst signal of this field is different from that of the vertical synchronization signal and color burst signal of the first field shown in Figure 1A. All coincide with each phase of the burst signal.
Therefore, in the PAL color video signal, the two-line correlation of color subcarriers is repeated at four field periods.

In terms of the phase of the color subcarrier with respect to the horizontal synchronization signal, the PAL system has an 8-field period, but in the APC circuit in the VTR playback circuit, the color burst phase is synchronized with the output color subcarrier frequency of the fixed oscillator. Because it is controlled to be drawn in instantaneously (several H periods), it is stabilized within the vertical blanking period, and the reproduced carrier color signal will not be output with a 180° phase shift at the editing point. , there is no need to consider the 180° phase shift of the color subcarrier with respect to the horizontal synchronization signal that occurs in 8 field periods, and the phase inversion (2H-correlation) for each line of the color subcarrier of the color difference signal (RY)
In order to maintain the continuity of the conveyed color signal in consideration of interlaced scanning and interlaced scanning, it is sufficient to perform frame servo in units of two frames.

However, the conventional frame servo circuit described above distinguishes between odd and even fields and records the odd and even fields alternately. As the signal of the field to be edited and recorded next after the second field, the third field which is an odd number field or the first field
The signal from one of the fields was edited and recorded. However, in the above case, the third
There is no problem if you edit and record the signal of the field, but if you edit and record the signal of the first field, when playing back on a monitor receiver, you will notice that the order of the fields at the editing point is not the normal order. The burst phase discriminator in the monitor receiver detects the modulated wave, which is detected by the color difference signal (R-Y), and the modulated wave obtained by modulating the carrier wave is sent to a circuit that synchronously detects the phase at the color subcarrier frequency fsc. There is a time delay between switching and reconnecting the line switch to select and output the signal to be inverted, and during this time a phenomenon occurs in which the colors of the reproduced image become unstable (this is called a color skipping phenomenon). However, there was a problem that the period was relatively long.

Therefore, the present invention provides an external input to be recorded.
The first flag pulse (hereinafter also referred to as "color frame pulse") indicating any one of the first to fourth fields of the PAL color video signal and the signal reproduced from the recorded recording medium for editing and recording. 1st to 4th PAL color video signals
A second field indicating the same field as above
The above problem can be solved by detecting whether or not the phases of the color frame pulses match, and speeding up or decelerating the rotation of the capstan drive motor that drives the recorded recording medium until the phases match. It is an object of the present invention to provide a color frame servo circuit for an editing recording and reproducing device that solves the above problems.

Means for Solving the Problems The present invention provides an external input PAL color video signal to be recorded and a video signal reproduced from a recorded recording medium.
First and second detection for detecting the same predetermined field among the first to fourth fields of the PAL color video signal and generating first and second flag pulses indicating that field, respectively. a generation circuit; phase coincidence detection means for detecting that the phases of the first and second flag pulses match;
A trapezoidal wave generation circuit generates a trapezoidal wave from the first flag pulse, and a slope portion of the output trapezoidal wave of the trapezoidal wave generation circuit is sampled by a sampling pulse generated from at least the second flag pulse, and the value thereof is determined. During the period until a coincidence signal is output from the sampling and holding means for holding and the phase coincidence detection means, the output signal of the sampling and holding means is selectively outputted to a driving motor of a capstan that causes the recorded recording medium to run. The rotation of the motor is gradually increased, and when a coincidence signal is output from the phase coincidence detection means, the transmission of the output signal of the sampling and holding means to the motor is prevented, and the motor is rotated at a constant speed. The servo circuit is composed of a switch circuit that is controlled by the output signal of a phase coincidence detection means, and the trapezoidal wave is a servo circuit that rotates the motor in a direction in which the phase difference between the fields decreases within a range in which a predetermined field is synchronized. A voltage gradient that generates an error voltage so as to be stable, and when the field phase difference is maximum, the voltage applied to the motor is increased or decreased at an accelerated pace to stabilize the field in such a way that the phase difference decreases. The voltage gradient is configured to have at least two different voltage gradients for generating an error voltage so as to be ejected into the region, and one embodiment thereof will be described below with reference to FIG. 2 and the subsequent drawings.

Embodiment FIG. 2 shows a block system diagram of an example of an editing recording/reproducing apparatus equipped with the circuit of the present invention. In the figure, a PAL color video signal to be recorded, which has been reproduced by an external VTR, for example, is input to an input terminal 1, and is input to a video recording circuit 2, a phase comparison circuit 3, a control signal generation circuit 4, and a color video signal to be described later. The signals are respectively supplied to the frame pulse detection circuit 5. When recording external input video signals by electronic editing, switches SW ₁ , SW ₂ and SW ₃ are connected to contact R, respectively. On the other hand, in order to search for an editing point, a recorded magnetic tape (not shown) is played back prior to recording the externally input PAL color video signal. During this reproduction, the switches SW ₁ , SW ₂ and SW ₃ are each connected to the contact P side.

As a result, the recorded signal on the recorded magnetic tape reproduced by the rotary head 6 is supplied to the video reproduction circuit 7 via the switch SW ₁ , where it is converted into a reproduced color video signal compliant with the PAL system through known signal processing. After that, it is supplied to a color frame pulse detection circuit 8, which will be described later. As will be described later, the color frame pulse detection circuits 5 and 8 are detection and generation circuits that detect a predetermined field among the first to fourth fields of a PAL color video signal to generate a color frame pulse, and their output color The frame pulse is supplied to a comparison control circuit 9, which will be described later.

The comparison control circuit 9 is a circuit that generates a signal to gradually speed up (or slow down) the capstan motor 14 until the phases of the two input color frame pulses match, and the output signal is sent to the terminal of the switch circuit 10. 10a. This switch circuit 10 is controlled by a coincidence signal taken out from a part of the comparison control circuit 9, and when the phases of the two color frame pulses do not match, it is connected to the terminal 10a side, and when the phases match, it is connected to the terminal 10a side. It is switched and connected to the terminal 10b. Note that when searching for an edit point, the switch circuit 10 always connects the terminal 10b.
connected to the side. The color frame pulse generation circuits 5, 8, comparison control circuit 9, and switch circuit 10 described above constitute a color frame servo circuit 11 of the present invention.

When searching and registering the editing start point and editing end point on the recorded magnetic tape, and then recording the externally input PAL color video signal by splicing or insert recording, the recorded magnetic tape is once located at the editing point. After being rewound for a certain period of time from the recording position, the tape is made to run forward again from the upstream side of the editing start point and is first reproduced. During this reproduction period, when the phases of the output color frame pulses of the color frame pulse detection circuits 5 and 8 do not match, the output signal of the comparison control circuit 9 is taken out from the switch circuit 10, and the output signal of the comparison control circuit 9 is taken out from the switch circuit 10. They are supplied to the capstan motor 14 through the drive circuits 13, respectively, and are controlled to rotate at a gradual speed increase or deceleration. As a result, the running speed of the recorded magnetic tape gradually increases or decreases.

The rotational speed of the capstan motor 14 is detected by a known frequency generator FG15, and is taken out as a rotational speed detection signal with a frequency corresponding to the rotational speed and supplied to the frequency-voltage conversion circuit 16.
After being converted into a voltage here, it is further supplied to the mixing circuit 12. When the phases of the above two color frame pulses match (the matching point is on the upstream side of the tape from the editing start point), the switch circuit 10 is switched to the terminal 10b.

On the other hand, in the above reproduction mode, the control signal reproduced by the control head 17 from the control track of the recorded magnetic tape is transmitted to the switch SW ₂ , the amplifier circuit 18 and the switch SW 2 .
The signals are supplied to the phase comparator circuit 3 through the SW ₃ , where the phase is compared with, for example, a vertical synchronizing signal in the externally input reproduced color video signal from the input terminal 1. Therefore, from the time when the phases of the two color frame pulses match, the output phase error voltage of the phase comparison circuit 3 and the output speed error voltage of the frequency-voltage conversion circuit 16 are mixed in the mixing circuit 12, respectively. ,
It is supplied to the capstan motor 14 through the drive circuit 13 and controls its rotation.

When the reproduction position reaches the editing start point in the above state, the editing recording/reproducing device automatically enters the recording mode, and the switches SW ₁ , SW ₂ and SW ₃ are switched to the contact R side. As a result, the signal obtained by converting the external input PAL color video signal taken out from the video recording circuit 2 into a predetermined signal format is supplied to the rotary head 6 through the switch SW ₁ , and is spliced onto the recorded magnetic tape. Begins to be recorded or inserted. At the same time, the control signal generating circuit 4 divides the frequency of the vertical synchronizing signal in the reproduced color video signal from the input terminal 1 into half and supplies the control signal to the control head 17 through the switch SW ₂ . Accordingly, a control signal is recorded on the control track, for example, at one frame period when recording the first and third fields. Further, the rotational speed detection signal taken out from the FG 15 is frequency-divided by a frequency dividing circuit 19 to become a signal with one frame period, and then sent to a phase comparator circuit 3.
supplied to The above recording mode continues until the editing end point. In this way, electronic editing is performed.

Next, to explain the circuit of the present invention in more detail, FIG. 3 shows a block system diagram of an embodiment of the essential part of the circuit of the present invention. In the figure, the same components as in FIG. 2 are designated by the same reference numerals. At the start of automatic editing, as described above, an externally input reproduced PAL color video signal is input to the input terminal 1, and an input signal is input from the editing start point of the magnetic tape recorded by the editing recording/reproducing device to the input terminal 20. A PAL color video signal that has been reproduced from a position a certain amount of time ago also comes in.
Now, the input terminal 1 receives a PAL color video signal a to be recorded in the field order schematically shown in FIG. 4A, and the input terminal 20 receives the PAL color video signal
Play PAL with field order as shown schematically in
Assume that a color video signal b is input.

The PAL color video signals a and g that have entered the input terminals 1 and 20 are supplied to color frame pulse detection circuits 5 and 8. Here, as is clear from FIGS. 1A to 1E, there are two methods for detecting the color frame pulse. The first method is to determine and detect the phase difference between color burst signals on any line viewed from the vertical synchronization pulse between odd or even fields. Also the second
In this method, the timing at which the color burst signal appears for the first time immediately after the vertical synchronization pulse is the third, second, and third timing.
This is the order of the first and fourth fields, and the field is determined by focusing on the timing at which the field of this color burst signal first appears (for example, when the color burst signal first appears at 6H, That field becomes the third field.) The present invention can use either of these two detection methods, but in this embodiment, the color frame pulse detection circuits 5 and 8 adopt the second method, which requires a relatively simple circuit, and the first to An example will be described in which a third field among the fourth fields is discriminated and a color frame pulse is generated when the third field enters.

As a result, the color frame pulse detection circuit 5
A first color frame pulse b as shown in FIG. 4B is taken out from the color frame pulse generating circuit 8, and a second color frame pulse h as shown in FIG. 4H is taken out from the color frame pulse generating circuit 8. The color frame pulse b is supplied to a timing pulse generation circuit 21 and a reference color frame pulse generation circuit 22 in the comparison control circuit 9, respectively. The timing pulse generation circuit 21 delays the color frame pulse b by 1 field and 3 fields, respectively, and generates the signals shown in FIGS. 4C and D.
Pulses c and d of constant width as shown in FIG. The trapezoidal wave generating circuit 23 generates a trapezoidal wave e as shown in FIG. 4E, which rises at a constant slope during the pulse width period of the pulse c and falls at a constant slope during the pulse width period of the pulse d. Also, from the falling point of pulse c, pulse d
During the period up to the rising edge of pulse d and the period from the falling edge of pulse d to the rising edge of pulse c, the trapezoidal wave e has a waveform whose level gradually decreases over time. This trapezoidal wave e is supplied to a sampling and holding circuit 24, where its slope portion is sampled and held.

On the other hand, the reference color frame pulse generation circuit 22
delays the color frame pulse b for a period slightly smaller than 4 fields to generate a pulse f with a constant width wider than the pulse width of the color frame pulse b, as shown in FIG. It is supplied to the matching circuit 25 as a pulse.
This coincidence circuit 25 is constituted by, for example, an AND circuit, and is a circuit that detects whether or not the phases of the color frame pulse h and the reference color frame pulse f coincide with each other. As a result, Figure 4A
During the period T ₁ shown in the upper part of , both fields of the input PAL color video signals a and g do not match, so a low level signal is taken out from the matching circuit 25 and sent to the second through the output terminal 26. The signal is applied as a switching signal to the switch circuit 10 shown in the figure, and is connected to the terminal 10a side.

The above color frame pulse h is supplied to the gate circuit 27, where it is delayed for a period slightly smaller than 4 fields, and is converted into a gate pulse having a constant width and a wide pulse width as shown in FIG. 4J. converted. The gate circuit 27 is shown in FIG.
It is configured to pass and output the playback control signal i shown in FIG. 4I that comes in from the input terminal 28 during the high level period of the gate pulse shown in FIG. ing. Here, the playback control signal i is a signal played back from the control track of the recorded magnetic tape being played back by the editing recording/playback device, and is a signal played back from the control track of the recorded magnetic tape input to the input terminal 20. Since the playback control signal i is recorded corresponding to the start position of the first field and the start position of the third field of the color video signal g, the playback control signal i is as shown in FIGS.
As you can see, 2 fields (1 frame)
It is played back periodically and at the start positions of the first and third fields.

In this embodiment, as will be described later, the error voltage is obtained by sampling the trapezoidal wave e using the reproduction control signal i. However, as described above, the reproduction control signal i is generated twice during four fields. , color frame pulses b, h, which come in at the start position of the third field, must be used as sampling pulses. Therefore, a gate circuit 27 is provided for this purpose, and during the high level period of the gate pulse shown in FIG.
Since it is set for a certain period before and after the start position of the third field of the color video signal g, the gate circuit 27 outputs the reproduction signal as shown in K in the same figure.
Only the control signal k reproduced near the start position of the third field of the PAL color video signal g is extracted and sent to the sampling pulse generation circuit 2.
It is generated on 9th.

The sampling pulse generation circuit 29 delays the reproduction control signal k by a certain period of time and generates and outputs a sampling pulse l as shown in FIG. 4L. This sampling pulse l is supplied to a sampling hold circuit 24, where the slope portion of the trapezoidal wave e is sampled. The phase of this sampling pulse l is selected to be the falling slope portion of the trapezoidal wave e during the period _T1 in which the color frame pulses b and h do not match. As a result, the sampling and holding circuit 24 holds the voltage obtained by sampling the falling slope of the trapezoidal wave e using the sampling pulse l until sampling is performed using the next sampling pulse l that comes in approximately four fields later. By repeating this operation, an error voltage m as shown by a dashed line in FIG. 4E is outputted to the output terminal 30.

This error voltage m is the switch circuit 10 described above,
It is supplied to the capstan motor 14 through the mixing circuit 12 and the drive circuit 13, respectively, and controls its rotation speed. Here, the capstan motor 14 is controlled to rotate faster as the error voltage m increases, but as is clear from _FIG . Since the phase relationship is selected such that the falling slope of e (that is, the slope opposite to the slope of the trapezoidal wave sampled in the phase control system of a normal capstan servo circuit) is selected. The comparison control circuit 9 consisting of circuits 21 to 25, 27, and 29 in FIG. 3 operates so that the speed error of the capstan motor 14 gradually increases, and the error voltage m gradually increases. The stun motor 14 is rotated gradually faster.

As a result, the running speed of the recorded magnetic tape is forced to gradually increase, so that the fields of the reproduced PAL color video signals a and g can be brought into alignment in a shorter time than in the past. As a result, in FIG. 4 A to L, both regenerations occur at time t ₁ .
For example, the fields to be reproduced of the PAL color video signals a and g match in the second field, but
At this time, color frame pulses b and h are not output, and the time around the start of the next third field reproduction is
When color frame pulses b and h are simultaneously detected and output at _t2 , a high-level coincidence signal is output from the coincidence circuit 25, and the switch circuit 10 shown in FIG. 2 is switched and connected to the terminal 10b side. Therefore, during the period T2 after time _{t2 ,} the capstan motor 14 is controlled by the normal servo circuit so that its rotational speed is constant, as explained in conjunction with FIG.

In this way, for example, the external input PAL color video signal supplied to the input terminal 1 of the editing recording and reproducing device is reproduced from the magnetic tape 31 having the tape pattern shown in FIG. 5A, and
The tape pattern of the recorded magnetic tape 32 shown in FIG. 5B is for recording and playing back color video signals from the recorded video track after the 329th control signal recording position shown in FIG. If continuous recording is performed instead of the recording video track after the 127th control signal recording position shown in FIG. 1, a recorded magnetic tape 32' having a tape pattern as shown in FIG.

In Figures 5A to C, the video track shown in white is the 3rd field, the video track with the diagonal line going down to the right is the 4th field, the video track filled in black is the 1st field, and the video track with the diagonal line going down to the left is the 4th field. The PAL color video signal of the second field is recorded on the video track marked with . Therefore, the PAL color video signal is recorded in the normal field order before and after the editing point on the recorded magnetic tape 32', and therefore color skipping does not occur.

Note that when the editing start point of the magnetic tape 31 is in a field different from the editing start point of the recorded magnetic tape 32, the field closest to the editing start point,
Recording starts from the track position where the same field as the editing start point is recorded. For example, if the editing start point is the 3rd field recording position in Figure 5A, where the 330th control signal is recorded, the playback starts from this recording position onwards.
For PAL color video signals, even if the editing start point is at the position shown in Figure 5B, the 126th or
Continuous recording will begin from the third field recording position where the 128th control signal is recorded.

Effects As described above, according to the present invention, a predetermined field of each of the first to fourth fields of the external input PAL color video signal to be recorded and the PAL color video signal reproduced from the recorded recording medium is During the period until the phases of the first and second flag pulses (color frame pulses) indicating the same field match, the rotation of the drive motor of the capstan that drives the recorded recording medium is gradually increased or Since the speed is decelerated, it is possible to prevent the color splash phenomenon near the editing point, and when the fields of both signals are different, the voltage applied to the capstan motor tends to increase or decrease at an accelerating rate. As a result, the capstan motor is controlled so that the two signals quickly escape from the out-of-sync state and stabilize in a synchronized state, reducing the time required for color framing and thus improving editing efficiency. In addition, since the pulse for sampling the slope part of the trapezoidal wave is generated based on the reproduction control signal, the above-mentioned sampling pulse is generated based on the reproduction vertical synchronization signal. 1. When running the recorded recording medium gradually faster (or slower) in order to match the phase of the second flag pulse, sampling may be interrupted due to noise mixed into the reproduced color video signal due to tracking deviation of the rotating head with respect to the video track. The phenomenon of inaccuracy is
This does not occur because the control head does not cause tracking deviation with respect to the control track.
Therefore, it has the advantage of being able to perform accurate sampling.

[Brief explanation of drawings]

Figures 1A to 1E are waveform diagrams near the vertical synchronizing pulse of each field of the PAL color video signal, respectively.
FIG. 2 is a block system diagram showing an example of an editing recording/reproducing device equipped with the circuit of the present invention, FIG. 3 is a block system diagram showing an embodiment of the main part of the circuit of the present invention, and FIG.
The figures are timing charts for explaining the operation of the block system shown in Figure 3, and Figures 5A to 5C are the tape patterns of the magnetic tape on which the color video signals to be recorded are reproduced, respectively, and the recorded state before editing and recording. FIG. 3 is a diagram showing a tape pattern of a magnetic tape and a tape pattern of a recorded magnetic tape after editing and recording. 1... Reproduction PAL color video signal input terminal to be recorded, 5, 8... Color frame pulse detection circuit, 6... Rotating head, 9... Comparison control circuit, 10... Switch circuit, 11... Color Frame servo circuit, 14... Capstan motor, 17... Control head, 20... Regeneration
PAL color video signal input terminal, 21... timing pulse generation circuit, 22... reference color frame pulse generation circuit, 23... trapezoidal wave generation circuit, 24... sampling hold circuit, 25...
... Matching circuit, 26... Matching signal output terminal, 27...
...Gate circuit, 28...Reproduction control signal input terminal, 29...Sampling pulse generation circuit,
30...Error signal output terminal.

Claims (1)

[Claims] 1. Detecting a predetermined field among the first to fourth fields of an externally input PAL color video signal to be recorded, and generating a first flag pulse indicating the field. The first detection and generation circuit detects the predetermined field among the first to fourth fields of the PAL color video signal reproduced from the recorded recording medium to be edited and recorded, and outputs the field. a second detection generation circuit that generates a second flag pulse shown in FIG. a trapezoidal wave generation circuit that generates a trapezoidal wave; sampling and holding means that samples the slope portion of the output trapezoidal wave of the trapezoidal wave generation circuit using at least a sampling pulse generated from the second flag pulse and holds the value; During the period until a coincidence signal is output from the phase coincidence detection means, the output signal of the sampling hold means is selectively outputted to a drive motor of a capstan that causes the recorded recording medium to run, thereby changing the rotation of the motor. The field of the signal on the tape is shifted, and when a coincidence signal is output from the phase coincidence detection means, transmission of the output signal of the sampling and holding means to the motor is prevented, and the motor is rotated at a constant speed. , a color frame servo circuit comprising a switch circuit controlled by switching by an output signal of the phase coincidence detection means, wherein the trapezoidal wave is generated so that the rotation of the motor is controlled within a range in which a predetermined field is synchronized with a small phase difference between the fields. A voltage gradient that generates an error voltage so as to be stable in the direction of 1. A color frame servo circuit in an editing recording/reproducing device, characterized in that the circuit has at least two different voltage slopes in a voltage region that generates an error voltage so as to jump out to a stable region in the direction. 2. The sampling pulse generated and used by the sampling and holding means is applied to one of the predetermined fields among the signals obtained by reproducing a control signal that has been recorded in advance on the recorded recording medium at a constant period. 2. A color frame servo circuit in an editing recording and reproducing apparatus according to claim 1, wherein said color frame servo circuit is generated based on a correspondingly generated reproduction control signal and said second flag pulse.