JPH0537902A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To obtain a fine slow-reproducting image by adding a reproducting control signal corresponding to a reproduced image in a field memory to the reproduced image. CONSTITUTION:This magnetic recording/reproducing device for a MUSE signal is provided with the field memory 7, a control circuit 8, a CTL (control) signal rewriting circuit 5. At the time of slow reproducting, a reproducting control signal outputted from a CTL signal detecting circuit 3 is changed so as to include phase information corresponding to a reproduced video signal outputted from the memory 7 and then reformed to a MUSE signal by a CTL signal adding circuit 1.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a MUSE signal (Multiple Sub) recorded by band-compressing a so-called high-definition television (High Definition Television) signal.
-A magnetic recording / reproducing apparatus for reproducing Nyquist Sampling Encoding).

[0002]

2. Description of the Related Art The MUSE system is a band compression system developed by NHK (Japan Broadcasting Corporation) for transmitting high-definition signals by broadcasting satellites, and its content is NHK Technical Research, Showa 62, Vol. 39, Vol. No. 2, pp.18-53, etc.

According to this method, the baseband HDTV signal is band-compressed to 8.1 MHz by performing offset subsampling. In the broadcasting satellite, the data is transmitted with the configuration shown in FIG. That is, one line is sampled at 480 points, 11 points are assigned to HD (horizontal synchronization signal), 94 points are assigned to color difference signal (C signal), and 374 points are assigned to luminance signal (Y signal). And the luminance signal are line-sequentially and time-division multiplexed and transmitted.

Further, as shown in FIG. 8, the sampling phase of each field of the MUSE signal is formed into a sampling pattern, and this sampling phase is cyclic in 4 fields.

Here, FIG. 9 shows an example of a basic configuration of a MUSE decoder for restoring the MUSE signal to a high-definition baseband signal.

In the MUSE decoder having the configuration shown in FIG. 9, when a MUSE signal is input to the input terminal 21, A / A
The MUSE signal input by the D conversion circuit 22 is converted into a digital signal and sent to the de-emphasis circuit 24 and the control signal separation / detection circuit 23. In the de-emphasis circuit 24, a process reverse to the emphasis process performed for the transmission is performed, and then the de-emphasis circuit 24 sends each to the moving image processing circuit 27, the still image processing circuit 26, and the motion detection circuit 25.

The moving image processing circuit 27 performs only the intra-field interpolation processing to generate a moving image signal, and this moving image signal is sent to the mixing circuit 28. On the other hand, in the still image processing circuit 26, inter-frame interpolation processing is performed after performing inter-frame interpolation processing using signals of four fields. That is, a still image signal is generated using all four types of sample points shown in FIG. 8, and this still image signal is sent to the mixing circuit 28.

In the motion detection circuit 25, the input MUS
By taking the difference between the 1st. (First) frame and the 2nd. (Second) frame of the E signal, the moving area of the image is detected to generate a motion signal, and this motion signal is sent to the mixing circuit 28.

The control signal separation / detection circuit 2
In 3, the control signal in the input MUSE signal is separated and detected as shown in Table 1. Based on the control signal thus separated and detected, the data processing method in the still image processing circuit 26 and the motion signal which is the output signal of the motion detection circuit 25 are controlled.

[0010]

[Table 1]

In the mixing circuit 28, the moving image signal and the still image signal are mixed for each pixel based on the above motion signal,
Alternatively, it is sent to the TCI decoding circuit 29 after being switched. In the TCI decoding circuit 29, the line-sequential / time-division multiplexed luminance signal and color difference signal, which are the output signals of the mixing circuit 28, are TCI-decoded. The TCI-decoded luminance signal and color difference signal are input to the D / A conversion circuit 30 and converted into analog signals, and then output from the output terminal 31.

The still picture processing circuit 26 carries out still picture processing as follows to generate a still picture signal. That is, as described above, the still image signal is generated by performing the interpolation process using all the sample points of the four fields. Therefore, in order to perform such an interpolation process, it is necessary to accurately grasp the sampling phase of the sample point.

Data indicating the sampling phase is written in the control signal shown in Table 1. This data is separated and detected by the control signal separation / detection circuit 23, and the phase with respect to the previous frame and the previous field is judged based on this to obtain a good image.

Therefore, in order to obtain a good image even when the tracks on the medium are reproduced in a different order from the time of recording, that is, so-called slow reproduction, the video data indispensable for the interpolation processing in the MUSE decoder is obtained. Corresponding control signal is required.

As a means for performing slow reproduction, VHS is used.
For equipment that records and reproduces NTSC signals using the (Video Home System) method, etc.
(November 1985) a method using a field memory is disclosed. This method will be described below with reference to FIGS.

For example, a magnetic head having a positive azimuth angle (hereinafter referred to as + azimuth head) A ₁ and a magnetic head having a negative azimuth angle (hereinafter referred to as −azimuth head) A ₂ as shown in FIG. When a magnetic recording / reproducing apparatus is used in which the winding angle of the magnetic tape 32 is set to 180 ° in the magnetic head arrangement provided on the periphery of the rotating drum 33 with the head mounting angle of 180 °,
One track and one field recorded signal is reproduced.

In the above configuration, when the video signal is recorded in one field per track, the locus of the magnetic head is as shown in FIG.
As shown in (a), + azimuth head A
₁ and-Azimuth head A ₂ alternately play RF (Rad
io Frequency) signal is picked up (Fig. 11 (b)
(See FIG. 11), the envelope of the reproduction RF signal at that time is shown in FIG.
As shown in (c), it changes periodically. Incidentally, FIG.
The numbers in (a) and FIG. 11 (c) correspond to the corresponding fields.

When the reproduction RF signal periodically becomes maximum, the video signal data is written in the field memory (not shown) to realize good slow reproduction. That is, based on the write control signal (WE) as shown in FIG. 11D, the video data demodulated with a sufficient RF signal is written, and the same image is displayed until a sufficient RF signal is obtained next. It is designed to be output (Fig. 1
1 (e)).

Further, as shown in FIG. 12, a pair of + azimuth heads B ₁ and B ₃ and −azimuth heads B are respectively provided.
_{When 2} · B ₄ uses the magnetic head arrangement provided on the periphery of the rotary drum 34 to divide the video signal into two channels and performs slow reproduction at 1/3 speed, the magnetic head 13A, the reproduction RF signal is picked up alternately by the + azimuth heads B ₁ and B ₃ or the −azimuth heads B ₂ and B ₄ , and the envelope of the reproduction RF signal at that time is picked up. Is shown in FIG.
It changes as shown in each of (b) to (e). 13 (a), (c), and (e), for example, 1-1 represents a signal recorded by being divided into the first channel in the first field, and 3-2 represents the third field in the third field. The signal is divided into two channels and recorded.

At this time, as shown in FIG. 13 (f), a video data write control signal (W
According to E), video data demodulated in the same field and with a sufficient RF signal is written in both channels, so that the same video is obtained until the next sufficient RF signal is obtained, as shown in FIG. Is output.

[0021]

However, in the MUSE signal, although the reproduction RF signal sufficient for demodulation can be secured by the above conventional method, the control signal reproduced at the same time as the video data is in the next field of the normal reproduction. It corresponds. Therefore, when the control signal and the video signal of the same field are written in the field memory, in the case of slow reproduction whose reproduction order is different from that of normal reproduction,
The read control signal no longer corresponds to the video data. As a result, erroneous interpolation processing is performed in the decoder, which causes a problem that image quality is significantly deteriorated and it is difficult to realize good slow reproduction.

The present invention has been made in view of the above,
The purpose is to change the phase information of the control signal to the phase information corresponding to the sub-sampling phase of the reproduced video data, so that the MUSE decoder performs interpolation processing at the correct phase to realize good slow reproduction. It is a thing.

[0023]

In order to solve the above-mentioned problems, a magnetic recording / reproducing apparatus according to the invention of claim 1 magnetically reproduces a signal (for example, a MUSE signal) recorded by band compression. In the reproducing device, a field memory, control means for controlling writing in the field memory, reproducing means for reproducing the control signal,
And a changing means for changing the control signal reproduced by the reproducing means, and when the reproduction RF signal is periodically maximized so that an RF signal sufficient for demodulation can be ensured during slow reproduction, the change is made to the field memory. It is characterized in that the phase information in the control signal is made to correspond to the reproduced video data, paying attention to the fact that one field at the time of slow reproduction is composed of data of a single field while writing is performed.

Further, in the embodiment of claim 1, MUSE
It is preferable to include motion information changing means for changing the motion information contained in the control signal into a signal indicating a motion state so that the interpolation processing in the decoder becomes a complete field interpolation processing.

Further, with respect to eight kinds of phase information which are considered in advance as phase information, a ROM in which eight control signal patterns each having motion information as a signal indicating a motion state are programmed, and a phase of image data from the ROM are set. It is preferable that the control signal is provided with a reading means for reading a corresponding control signal, and the reproduced control signal is selected during normal reproduction, and the control signal read from the ROM by the reading means is selected during slow reproduction.

Further, in addition to the aspect of claim 1, a memory device for storing the reproduced control signal and a predicting means for predicting a point where the field reproduced by the slow reproduction changes are reproduced, and the control signal is reproduced. It is preferable to control the control signal written in the memory device so as to correspond to the generated video data.

At this time, the motion information in the control signal is changed to a signal indicating the motion state while keeping the control signal in the transmission form so that the interpolation process in the MUSE decoder becomes a complete field interpolation process. It is preferable to include means for changing motion information.

[0028]

According to the structure of claim 1, during the normal reproduction, the control signal reproduced by the reproducing means is output by the changing means and added to the video data stored in the field memory. On the other hand, during slow reproduction, the control means writes data to the field memory when the reproduction RF signal periodically becomes maximum, so that an RF signal sufficient for demodulation can be secured and at the time of slow reproduction. Since the field is composed of the data of a single field, the changing means changes the reproduced control signal so as to have the phase information corresponding to the image data stored in the field memory and adds it to the image data. It

At this time, the motion information included in the control signal is changed to a signal indicating the motion state by the motion information changing means so that the interpolation process in the MUSE decoder becomes a complete field interpolation process. As a result, the deterioration of the image quality due to the fact that the phase information in the reproduced control signal does not circulate is avoided.

Further, since the ROM is provided, the reproduced control signal is selected during the normal reproduction, and the control signal corresponding to the phase of the video data read out from the ROM by the reading means is selected during the slow reproduction.

Further, in addition to the structure of claim 1, the memory device and the prediction means are provided, so that the point where the field reproduced by the slow reproduction is changed by the prediction means during the slow reproduction is predicted and stored in the field memory. The control signal is controlled so that the control signal is written to the memory device immediately before the changed field is changed. Therefore, the control signal output from the memory device is changed immediately before the field changes and is added to the video data, and the same control signal is output until the time immediately before the next field changes. A control signal corresponding to the generated video data is added.

In addition, the motion information changing means allows the MUS
The motion information included in the control signal is changed to a signal indicating the motion state so that the interpolation process in the E decoder is a complete field interpolation process. The deterioration of the image quality due to the fact that the phase information in the control signal does not circulate is avoided.

[0033]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The following will describe one embodiment of the present invention with reference to FIGS.

The main part of the configuration example of the magnetic recording / reproducing apparatus according to the present embodiment will be described below with reference to FIG.

For example, a reproduction signal reproduced from a magnetic tape (not shown) through a pair of + azimuth head (not shown) and −azimuth head is input to a control signal detecting circuit 3 which is a reproducing means. The reproduced video signal S output from the control signal detection circuit 3 is input to the field memory 7 as shown in FIG. A write control signal W for controlling writing of a video signal to the field memory 7, which is output from the control circuit 8 (control means) based on the slow reproduction command signal, is input to the field memory 7. There is. The output of the field memory 7 is sent to the CTL (control) signal adding circuit 1.

The control signal detected by the control signal detection circuit 3 is output to the control signal switching circuit 2 and the control signal decoding circuit 4 as a control signal for normal reproduction.

The control signal decoding circuit 4 decodes the expanded Hamming coded reproduction control signal and sends it to the control signal rewriting circuit 5. In the control signal rewriting circuit 5, since the phase information of the decoded reproduction control signal is the phase information corresponding to the next field during normal reproduction, the phase information is predicted by predicting the next field during slow reproduction from the slow reproduction speed. Is rewritten and the rewritten reproduction control signal is output to the control signal encoding circuit 6. In the control signal coding circuit 6, the rewritten reproduction control signal is expanded Hamming coded and output to the control signal switching circuit 2 as a reproduction control signal for slow reproduction.

In the control signal switching circuit 2, V
Based on the information indicating whether the TR reproduction is normal reproduction or slow reproduction, normal reproduction / output from the control circuit 8 is performed.
By the slow reproduction switching signal P, the reproduction control signal directly input from the control signal detection circuit 3 in the case of normal reproduction and the reproduction control signal input from the control signal encoding circuit 6 in the case of slow reproduction are selected and controlled. The signal is output to the signal adding circuit 1. The output of the control signal adding circuit 1 is sent to the subsequent circuit (not shown) via the output terminal 9.

The control signal switching circuit 2, the control signal decoding circuit 4, the control signal rewriting circuit 5, the control signal encoding circuit 6 and the control circuit 8
The changing means is constituted by.

In the above configuration, when the control circuit 8 receives a slow reproduction command signal from, for example, a VTR system controller (not shown), the write control signal W is output to the field memory 7 and the control signal switching circuit 2 is output. Normal playback / slow playback switching signal P
Is output. In the control signal switching circuit 2,
The switching control signal P selects the reproduction control signal at the time of slow reproduction, that is, the reproduction control signal input from the control signal encoding circuit 6, and outputs it to the control signal adding circuit 1. In the control signal addition circuit 1, the rewritten reproduction control signal is added to the video signal at the time of slow reproduction input from the field memory 7. That is, the reproduction control signal is inserted at a predetermined position of the MUSE signal (see FIG. 7), and the MUSE signal of the transmission form is reformed.

As a result, the reproduction control signal corresponding to the reproduction video signal is sent to the succeeding MUSE decoder (not shown) together with the reproduction video signal reproduced using the field memory without field mixture, so that the correct phase is obtained. Interpolation processing is carried out, and as a result, a good slow reproduction image is obtained.

By the way, in the case of searching for a place where the motion information of the control signal is the complete still image [1] originally in the still image, interpolation processing using four fields is performed.

However, in the method using the circuit having the above configuration, the phase circulation is different from that in the normal reproduction, so that the image quality may deteriorate when the still image processing is performed.

Therefore, in order to solve this problem, the following measures are taken in this embodiment. That is, in the control signal rewriting circuit 5 of FIG. 1, the phase information of the control signal is rewritten, and the motion information contained in the control signal is changed to the degree of motion [7], and then interpolated by the MUSE decoder. The processing is only field interpolation. As a result, the reproduced image is not affected by the deviation of the phase circulation, and a good slow reproduced image can be obtained.

In the circuit shown in FIG. 1 described above, in order to obtain the control signal for slow reproduction, in addition to the circuit for rewriting the phase information, the control signal rewriting circuit 5 having the circuit serving as the above-mentioned motion information changing means. Further, the control signal encoding circuit 6 and the like for encoding the rewritten signal into the transmission form again is required, and the circuit scale becomes large.

Therefore, FIG. 1 shows another embodiment in which the circuit scale is reduced. The members having the same functions as those shown in FIG. 1 are designated by the same reference numerals,
The description is omitted.

As shown in FIG. 2, the reproduction control signal decoded by the control signal decoding circuit 4 is output to the control signal generation ROM 10. In the control signal generation ROM 10, with respect to the eight types of phase information considered as the phase information included in the reproduction control signal, the motion information is set to the degree of motion [7], and the reproduction control signal pattern is expanded Hamming coded for transmission. Is pre-programmed. Also,
A signal Q relating to the variable reproduction speed is input to the control signal generation ROM 10.

In the above configuration, when the slow reproduction command is input to the control circuit 8, the switching signal P causes the control signal switching circuit 2 to select the signal from the control signal generation ROM 10 as the reproduction control signal. become.

On the other hand, in the control signal generation ROM 10, the reading means gives the speed Q of the slow reproduction and the phase information of the reproduction control signal inputted from the control signal decoding circuit 4 to, for example, the upper address of the ROM to reproduce the reproduction. The reproduction control signal corresponding to the phase information of the video signal is selected and read. Then, the read reproduction control signal is output to the control signal switching circuit 2 as a reproduction control signal for slow reproduction.

Then, the control signal switching circuit 2
The signal output from the control signal adding circuit 1 is added to the reproduced video signal sent from the field memory 7 in the control signal adding circuit 1, and the subsequent circuit (not shown) is output via the output terminal 9.
Is output to.

Next, in slow reproduction, focusing on the fact that the reproduced fields are continuous, an embodiment in which the reproduction control signal can be changed more easily will be described with reference to FIGS. While explaining.

As shown in FIG. 3, the reproduction control signal detected by the control signal detection circuit 3 is sent to the control signal storage RAM 11 as a memory device. Further, the control signal R is output from the control circuit 12 which is a predicting means to the control signal storage RAM 11. The control signal R permits writing to the storage RAM during normal reproduction, and permits writing only during the slow reproduction in the field immediately before the field to be reproduced. The signal output from the control signal storage RAM 11 is input to the control signal adding circuit 1.

In the above-described structure, during normal reproduction, the control circuit 12 outputs a write control signal R as shown in FIG. 4A, that is, a signal which always permits writing, to the control signal storage RAM 11. Therefore, the reproduction control signal (FIG. 4 (c)) output from the control signal detection circuit 3 is sequentially written in the storage RAM, and the output from the control signal storage RAM 11 becomes as shown in FIG. 4 (d). As a result, the control signal adding circuit 1
In, a reproduction control signal corresponding to the reproduced video signal (FIG. 4B) output from the field memory 7 is added.

On the other hand, when the slow reproduction command is input to the control circuit 12 during the slow reproduction, the control circuit 12 outputs the command shown in FIG.
The control signal R shown in FIG.
11 is output. Based on this control signal R, a reproduced video signal output from the field memory 7 (FIG. 5 (b))
Only when the field of immediately before the field of changes,
The reproduction control signal (FIG. 5C) output from the control signal detection circuit 3 is written in the storage RAM. As a result, the reproduction control signal output from the control signal storage RAM 11 to the control signal adding circuit 1 becomes as shown in FIG. 5 (d). Therefore, the reproduction control signal corresponding to the image to be reproduced is selected, and the control signal adding circuit 1 re-forms the MUSE signal in the transmission form.

In the present embodiment, the control signal decoding circuit 4 for decoding the control signal is unnecessary as compared with the method using the control signal generating ROM 10 described above, so that the reproduction control corresponding to the reproduced video signal can be performed more easily. The signal is selected, and the circuit scale can be further reduced.

Further, as described above, FIG. 6 shows the case where the motion information in the reproduction control signal is changed to the degree [7] so that the deviation of the phase circulation during the slow reproduction does not affect the reproduced image. As described above, the control signal rewriting circuit 13 (motion information changing means) is set to the control signal storage RA.
It can be provided in the latter stage of M11 to change the transmission form of the MUSE signal. Therefore, a circuit for decoding the reproduction control signal is unnecessary and the circuit scale can be reduced.

[0057]

According to the magnetic recording / reproducing apparatus of the present invention,
As described above, the field memory, the control means for controlling writing to the field memory, the reproducing means for reproducing the control signal, and the changing means for changing the control signal reproduced by the reproducing means are provided. , So that enough RF signals can be secured for demodulation,
The phase information in the control signal is noted by paying attention to the fact that the field memory is written when the reproduction RF signal periodically becomes maximum and one field at the time of slow reproduction is composed of the data of a single field. Is configured to correspond to the reproduced video data.

Therefore, since the control signal having the phase information corresponding to the reproduced video data stored in the field memory is obtained during the slow reproduction, the subsequent decoder performs the interpolation processing with the correct phase. Therefore, there is an effect that a good slow reproduction image can be obtained.

Further, by providing the motion information changing means for changing the motion information contained in the reproduction control signal into the signal indicating the motion state, it is possible to avoid the deterioration of the image quality due to the fact that the phase information in the reproduction control signal does not circulate. Since the processing in the subsequent decoder can be performed in the field, the effect that a good slow reproduction image can be obtained is also obtained.

In addition to the above configuration, the magnetic recording / reproducing apparatus according to the third aspect of the present invention has eight types of phase information which are preliminarily considered as phase information, and each of the eight types of phase information is a signal indicating a motion state. A ROM programmed with a control signal pattern and a reading means for reading a control signal corresponding to the phase of the video data from the ROM are provided. The reproduced control signal is selected during normal reproduction, and the reading means reads out the ROM from the ROM during slow reproduction. The read control signal is selected.

Therefore, in addition to the above effects, there is an effect that the circuit scale can be reduced.

Further, in addition to the structure of claim 1, the magnetic recording / reproducing apparatus of claim 4 predicts a point at which a field for reproducing a control signal and a memory device for storing a reproduced control signal change. A predicting means is provided, and the control signal written in the memory device is controlled so that the control signal corresponds to the reproduced video data. Therefore, since the control signal having the phase information corresponding to the video data stored in the field memory is obtained during the slow reproduction, the interpolation process is performed at the correct phase in the subsequent decoder, and the good slow reproduction is achieved. In addition to the effect that an image can be obtained, a decoding control circuit and a coding circuit for the reproduction control signal are not required, and the circuit scale can be reduced, so that it is sufficient for a home magnetic recording / reproducing apparatus that requires miniaturization of the circuit. It has the effect of being applicable. Further, by providing the motion information changing means for changing the motion information in the control signal into a signal indicating the motion state, the interpolation processing in the decoder can be a complete field interpolation processing, The effect that a good slow reproduction image can be obtained is also obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing a main configuration of a magnetic recording / reproducing apparatus of the present invention.

FIG. 2 is a block diagram showing a main configuration of another magnetic recording / reproducing apparatus of the present invention.

FIG. 3 is a block diagram showing a main configuration of another magnetic recording / reproducing apparatus of the present invention.

FIG. 4 is an explanatory diagram showing an operation during normal reproduction in the configuration of FIG.

5 is an explanatory diagram showing an operation during slow reproduction in the configuration of FIG. 3. FIG.

FIG. 6 is a block diagram showing a main configuration of a magnetic recording / reproducing apparatus to which a control signal rewriting circuit is added in FIG.

FIG. 7 is an explanatory diagram showing a structure of a MUSE signal.

8 is an explanatory diagram of a sampling pattern showing a sampling phase in a video portion of the MUSE signal of FIG.

FIG. 9 is a block diagram showing a main configuration of a conventional MUSE decoder.

FIG. 10 is an explanatory diagram showing an arrangement of magnetic heads for reproducing signals recorded in one track and one field.

FIG. 11 is an explanatory diagram illustrating a case where 1/4 speed reproduction is performed using a field memory.

FIG. 12 is an explanatory diagram showing an arrangement of magnetic heads for reproducing signals recorded on two channels.

FIG. 13 is an explanatory diagram illustrating a case where a signal recorded on two channels is recorded at 1/3 speed reproduction using a field memory.

[Explanation of symbols]

1 control signal adding circuit 2 control signal switching circuit (changing means) 3 control signal detecting circuit (reproducing means) 4 control signal decoding circuit (changing means) 5 control signal rewriting circuit (changing means, motion information changing means) 6 control signal code Control circuit (changing means) 7 Field memory 8 Control circuit (control means, changing means) 10 Control signal generation ROM (ROM) 11 Control signal storage RAM (memory device) 12 Control circuit (prediction means) 13 Control signal rewriting circuit (movement) Information change method)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Michiyuki Sugino             22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka             Within Yap Co., Ltd.

Claims (5)

[Claims] 1. In order to compress a band, in the case of a still image, information of one screen is sampled and sampling phases of adjacent fields are sequentially shifted to make one cycle by n fields (n is an integer of 2 or more) to complete one screen. Information is formed by n fields, and in the case of a moving image, 1 screen of information is sampled and
A device for magnetically recording and reproducing a video signal formed by fields and sequentially shifting sampling phases of adjacent fields, and superimposing a control signal indicating the state of a still image or a moving image on the field memory and the field memory. Control means for controlling writing of data, reproducing means for reproducing the control signal, and changing means for changing the control signal reproduced by the reproducing means, and an RF signal sufficient for demodulation can be secured during slow reproduction. As described above, when the reproduction RF signal is periodically maximized, writing is performed in the field memory, and one field at the time of slow reproduction is formed by the data of a single field. The magnetic field is characterized in that the phase information of the Recording and reproducing apparatus. 2. A motion information changing means for changing the motion information in the control signal into a signal indicating a motion state so that the interpolation processing in the MUSE decoder becomes a complete field interpolation processing. The magnetic recording / reproducing apparatus according to claim 1. 3. A ROM in which eight control signal patterns each of which has motion information as a signal indicating a motion state are programmed with respect to eight kinds of phase information which are considered in advance as phase information, and a phase of video data from the ROM. A read-out means for reading out a corresponding control signal is provided, and the reproduced control signal is selected during normal reproduction, and the ROM is read out by the read-out means during slow reproduction.
3. The magnetic recording / reproducing apparatus according to claim 2, wherein the control signal read from is selected. 4. A memory device for storing a reproduced control signal, and a prediction means for predicting a point where a field reproduced by slow reproduction changes, so that the control signal corresponds to the reproduced video data. 2. The magnetic recording / reproducing apparatus according to claim 1, wherein a control signal written in the memory device is controlled. 5. A motion for changing motion information in a control signal into a signal indicating a motion state while keeping the control signal in the transmission form so that the interpolation process in the MUSE decoder becomes a complete field interpolation process. The magnetic recording / reproducing apparatus according to claim 4, further comprising information changing means.