JPS61255194A - Method for recording video signal to rotation recording medium - Google Patents

Abstract

PURPOSE:To obtain a reproducing color video signal having a good S/N and high picture quality by recording two to four types of recording signals of high upper limit frequency on an outer peripheral side recording area on a rotating recording medium divided into the same number as the recording signals in accordance with the upper limit frequency. CONSTITUTION:On a bracket 15, two magnetic heads 16 and 17 separated with a prescribed distance in the radius direction on the disk 1 of the magnetic heads 16 and 17 is approximately equal to the length in the radius direction of one recording area when an upper side recording surface of the disk 1 is equally divided into two recording areas as shown by W1U and W2U. Then, only an FM luminance signal selected in a wide band is recorded on outer periphery side of recording areas W1U and W1L without the band being restricted by two types of color difference components and the two types of the color difference components are converted into prescribed signal formations and recorded on inner peripheral side recording areas W2U, W2L. Thereby, a recording signal band can be more widely taken than the conventional recording method in which these signals are simultaneously transmitted by a 1 channel transmission line.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to a method of recording video signals on a rotating recording medium, and particularly to a method for recording video signals on a rotating recording medium, and particularly for recording a video signal on a disk-shaped rotating recording medium such as a magnetic disk or a floppy disk at a constant rotation speed. The present invention relates to a video signal recording method for recording a video signal on a rotating recording medium according to its recording band.

Conventional technology There are various video signal recording methods using the constant angular velocity method (CAV method), in which a disk-shaped rotating recording medium (hereinafter referred to as a disk) is rotated at a constant rotational speed and color video signals are recorded on the disk. A method has been proposed, and FIG. 8 shows an example thereof. In the figure, a disk 1 is, for example, a magnetic disk having a structure capable of magnetic recording and reproducing on both upper and lower surfaces, and is rotated at a constant rotation speed by known means around its mounting center hole 2. As shown in FIG. A bracket 3 is placed on the top surface of this disk 1.
A magnetic head 5 attached to the tip of the bracket 4 slides, and a magnetic head 6 attached to the tip of the bracket 4 slides on the bottom surface. For example, disk 1 rotates at 3600 "p■,
The magnetic heads 5 and 6 are intermittently stepped by one track pitch every field in the radial direction of the disk 1, and the color video signal is switched every field so that the magnetic heads 5 and 6 are alternately moved. For example, concentric tracks are formed on the upper surface of the disk 1 in which only odd-numbered field color video signals are recorded, and on the lower surface of the disk 1 only even-numbered field color video signals are recorded. Concentric tracks are formed. During playback, proper signal processing allows normal playback and slow motion playback.

Still image playback, field mode playback, etc. are possible.

Furthermore, by using only one of the magnetic heads 5 and 6 and continuously moving it in the radial direction of the disk 1, it is of course possible to form a spiral track on which a color video signal is recorded. It is.

FIG. 9 shows another example of the conventional disc recording method. In the figure, the same components as those in FIG. 8 are designated by the same reference numerals, and their explanations will be omitted. In FIG. 9, magnetic heads 8 and 9 mounted adjacent to bracket 7 slide and scan over disk 1. In FIG. These two magnetic heads 8 and 9 are provided close to only one side of the disk 1 in order to perform frame mode recording and reproduction using only one side of the disk 1.

Further, the relative linear velocities of the two magnetic heads 8 and 9 and the disk 1 are approximately the same since they are close to each other.

According to this example, the magnetic head 8 generates odd fields,
The magnetic head 9 can record and reproduce even field color video signals.

Further, FIG. 10 shows still another example of the conventional disk recording method. In the figure, the same components as those in FIG. 9 are denoted by the same reference numerals, and the explanation thereof will be omitted. In FIG. 10, magnetic heads 11 and 12 mounted adjacent to a bracket 10 slide simultaneously on the lower surface of the disk 1, respectively. According to this conventional example, for example, color video signals can be recorded in two channels on both sides of the disc 1.

Problems to be Solved by the Invention However, the conventional recording method shown in FIGS. 8 and 9
Since the color video signal is recorded through a single channel transmission path, the entire device becomes complicated and expensive if you try to obtain a high-quality reproduced color video signal.On the other hand, if you configure the device at a low cost, you will not be able to obtain a high-quality reproduced color video signal. There was a problem in that it was not possible to record records that would provide accurate results. In other words, the method for recording color video signals on a single channel transmission path is as follows:
Records a frequency modulated wave signal (FM signal) obtained by frequency modulating a high frequency or comparatively low frequency carrier wave in the entire color video signal in which a luminance signal and a carrier color signal are band-sharing multiplexed. Direct FM method (high band method or low band method), frequency modulated luminance signal (FM
A low frequency conversion color recording method is known that records a frequency division multiplexed signal of a luminance signal) and a low frequency conversion carrier chrominance signal, but direct FM7J requires a time base collector and is expensive, and also requires a differential gain, This tends to cause deterioration of differential phase, S/N, etc. On the other hand, the low frequency conversion color recording method allows recording in a relatively narrow recording band, and even if the running fluctuations of the recording medium are relatively large, the carrier color signal is converted to a low frequency range, so it is less affected by it. , home VTR
Although it is widely used and can be constructed at low cost, high resolution cannot be obtained because the band of the FM luminance signal and the band of the low-frequency conversion carrier color signal are mutually limited, and spurious signals occur, impairing image quality. In addition, because the low-frequency conversion carrier color signal is bias recorded using the FM luminance signal, there are problems such as AM noise occurring in the reproduced carrier color signal due to uneven contact between the recording medium and the head, worsening the S/N ratio. there were.

Another conventional method for recording color video signals using a single channel transmission path is to record a frequency division multiplexed signal consisting of an FMN degree signal and an FMill sequential color difference signal that occupies an empty frequency band on the lower side of the FMN degree signal. Low frequency conversion color difference signal line sequential FM method, and FM method obtained by time-division multiplexing the signals obtained by compressing the time axis of the luminance signal and line-sequential color difference signal, and frequency modulating the carrier wave with the time division multiplexed signal. The time-plex method for recording signals is also known, but according to these methods, there is no period during which the luminance signal and two types of chrominance signals are transmitted simultaneously. While high image quality can be obtained without mutual interference or moiré between the luminance signal and color difference signal, which can occur with the above-mentioned methods in which color difference signals are simultaneously transmitted and recorded, color difference signals are recorded line-sequentially. Therefore, there are problems in that the vertical resolution of the reproduced color signal deteriorates, a time-base compression circuit is required (the reproduction system requires a time-base expansion circuit), and the apparatus becomes expensive.

In addition, the disk 1 uses the CAV method, and a color video signal is magnetically recorded by a magnetic head 5.6, 8.9.11 or 12. η.

The recording track width is W, the relative linear velocity between the head and the disk 1 is V, the residual magnetic flux (11-fold density) of the disk 1 is Br,
'id is the self-demagnetizing loss, and Ls is the space loss during recording.
r' Space loss during playback 56. Letting the head gap loss be Lg, it is expressed by the following equation.

E,, -(8/π)-N-η-W-v-8,・Lid-
LSr・LSD-Ll) (1) Here, 2.5 1-16 Proverb tanh (--→ (
3) Br/H (2). However, in the equations (■ to 6), a and A are the gap length and cross-sectional area of the head, and I? ,, AC is the average magnetic path length and cross-sectional area gt, A t is the rear gap length and cross-sectional area,
μ. is the magnetic permeability of the magnetic core, HC is the coercive force of disk 1, λ is the recording wavelength, Sr is the space between the head and the magnetic layer of disk 1 during recording, and So is the space between the head and the magnetic layer of disk 1 during reproduction. . Further, the relationship between the recording wavelength λ, the magnetic layer thickness δ, the gear length gr of the recording head, and the above-mentioned space Sr is expressed by the following inequality.

δ/λ≧0.25 (7)9
/λ≦0.5 0Sr/λ≦0.
20 Therefore, as can be seen from equation (1), it can be seen that the reproduction output value Epp changes in proportion to the relative linear velocity V between the head and the disk. Here, as is well known, the relative linear velocity v (gi/s) between the head and the disk 1 at the rotation speed n (rps) when located at a distance II (radius) r (1) from the center of the disk 1 is = 2π "skewer n (1G), so the relative linear velocity V is smaller toward the inner circumference of the disk 1 than toward the outer circumference. Therefore, from equations (1) and (10), the playback output value Ep- It becomes smaller toward the inner circumference of the disk 1.

Therefore, in the conventional recording method shown in FIG. 8 as well as in the conventional recording method shown in FIGS. 9 and 10, the relative The linear velocity V is approximately the same, and the image quality of the color video signal reproduced from the inner circumference of the disc 1 is considerably lower than that of the outermost circumference, so the image quality of the color video signal reproduced from the inner circumference of the disc 1 is considerably lower than that of the outermost circumference. There was a noticeable problem.

Therefore, the present invention divides the recording area of a rotating recording medium into a plurality of concentric areas, and distributes two or more types of signals constituting a color video signal to the plurality of divided areas according to the recording upper limit frequency or weighting. It is an object of the present invention to provide a method for recording video signals on a rotating recording medium that solves all of the above problems by recording video signals separately.

Means for Solving the Problems The method of recording video signals on a rotating recording medium according to the present invention divides the recording surface of a disc-shaped rotating recording medium that is rotated at a constant frequency into a plurality of concentric recording areas. Among the recording signals of the seeds to four types, the recording signals of the two to four types are set at the upper limit so that the recording signal with a higher upper limit frequency or weighting is recorded in the outer recording area of the plurality of recording areas. According to the frequency or weighting, recording is performed in a plurality of recording areas using separate heads.

Two or more types of signals that make up an active color video signal, such as a luminance signal and two types of color difference signals, are recorded in separate recording areas on a rotating recording medium, so these signals can be transmitted through a single channel transmission path. Compared to conventional recording methods that transmit data simultaneously, a wider recording signal band can be obtained. Furthermore, among the two to four types of recording signals, for example, the recording signal with the lower upper limit frequency is recorded in the recording area on the inner circumferential side, so that recording can be performed that is least susceptible to the influence of a decrease in relative linear velocity on the inner circumferential side. . Each embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

Embodiment FIG. 1 shows the recording area, head arrangement, etc. of a first embodiment of the present invention. In the figure, the same components as those in FIG. Heads 16 and 17 are mounted and fixed, respectively.The magnetic heads 16 and 17 slide and scan the upper recording surface of the disk 1.
It is located closer to the outer circumference than point 7.

The deviation in the radial direction of the disk 1 of the magnetic heads 16 and 17 is the deviation in the radial direction of the - recording area when the upper recording surface of the disk 1 is equally divided into two recording areas as shown by WIL and Wzu. approximately equal to the length. On the other hand, bracket 1
A magnetic head 19 and a magnetic head 20 are fixedly attached to the magnetic head 8 at a position spaced a predetermined distance from the magnetic head 19 in the inner circumferential direction of one disk 1, respectively. The magnetic heads 19 and 20 slide and scan the lower recording surface of the disk 1, and the distance between them in the disk radial direction divides the recording area of the lower recording surface into two as shown by WIL and W2L in FIG. It is approximately equal to the length of the -recording area WIL or W2L in the disk radial direction.

The magnetic heads 16 and 17 are moved together with the bracket 15 intermittently in the disk radial direction by one track pitch every other field, and the magnetic heads 19 and 20 are moved along with the brackets 1-18, for example, in the disk radial direction.
and 17 are moved intermittently in the disk radial direction by one track pitch every other field. Further, only odd field video signals are supplied to the magnetic heads 16 and 17, respectively, and the magnetic heads 19 and 2
0 is supplied with an even field video signal. Therefore, for example, in the recording areas bXW+ u, W2 u of the disk 1 rotating at 3600 rps+, tracks on which two types of video signals are recorded separately and only odd fields simultaneously by the magnetic heads 16 and 17, which are not moving, are arranged in concentric circles. In the recording area of the lower recording surface, the two types of video signals are recorded separately by the magnetic heads 19 and 20, which are not moving, and concentric tracks are formed in which only even fields are recorded at the same time. be done.

Next, eight examples of the above two types of video signals will be explained. 2
The type of video signal may be any combination of the FM luminance signal and other signals, and the combinations shown in FIGS. 3 to 7 are conceivable. 3(A), FIG. 4(A), FIG. 5(A), FIG. 6(A) and FIG. 7(A) respectively show the frequency spectrum of the FM luminance signal. The process shown in FIG. 3(B) compresses the time axes of two types of color difference signals (for example, R-Y and B-Y, or , F obtained by frequency modulating the carrier wave with the time division multiplexed signal
The frequency spectrum of the M signal is shown. In addition, Fig. 4 (B
) is the frequency spectrum ■.

3 shows the frequency allocation of the frequency division multiplexed signals of the first and second FM color difference signals indicated by (2), respectively. 1st above
The FM color difference signal is a signal obtained by frequency modulating the carrier wave with the color difference signal B-Y (or Q signal), and is a signal obtained by frequency modulating the carrier wave with the color difference signal B-Y (or Q signal).
The color difference signal is a signal obtained by frequency modulating a carrier wave with the color difference signal R-Y (or ■ signal).

Here, the expressions RY signal (or I signal) and BY signal (or Q signal) are used in the present IB for the following reason. As is well known, the carrier color signal of the PAL system is a modulated wave obtained by quadrature two-phase modulation of the carrier wave using color difference signals R-Y and B-Y, whereas the carrier color signal of the NTSC system is a color difference signal. This is a modulated wave obtained by quadrature two-phase modulation of a carrier wave using an I signal and a Q signal, but in the color vector diagram, the R-Y axis and the 1st axis are close to each other, and the B-Y axis and the Q axis are This is because they are close to each other. Here, it is well known that the (2) signal ET and the Q signal Eo have the following relationship with respect to the color difference signals @R-Y and B-Y.

El = 0.74 (ER-EY) −0,27(
Ee-EY) (11) Eo=
0.48 (ER-・EY) + 0.41 (Ee
-EY) (12) However, R-
The Y signal and B-Y signal bands are both nominally 1.5 MH.
z, whereas the I signal.

The nominal bands of the Q signal are 1.5MHz and 0.5MHz, respectively.
MH2, and the bands of color difference signals are different. That is, N
In the TSC system, the Q signal is band-limited to 0.5 MHz to prevent crosstalk between the ■ signal and the Q signal. On the other hand, in PAL system, R-Y signal, B-Y signal
The reason why the signal band is the same is that the color subcarrier of the R-Y signal is switched with a pulse of frequency fH/2 (where r+ is the horizontal scanning frequency) and the polarity is changed every IH (where H is the horizontal scanning period). Because they are inverted, the spectra of the modulated RY signal and BY signal do not match, and crosstalk does not occur.

However, as mentioned above, although the color difference signal bands are different between the PAL system and the NTSC system, if the same circuit configuration is used for equipment using the PAI system and the NTSC system, there are many circuits that can be used in common. It is assumed that the signal and the I signal, and the BY signal and the Q signal, are treated as the same type of color difference signal.

The frequency spectrum ■ shown in Figure 5 (B) is a line-sequential color difference signal in which the R-Y signal (or ■ signal) and the B-Y signal (or Q signal) are synthesized alternately in time series every day. The frequency spectrum of an FM line sequential color difference signal obtained by frequency modulating a carrier wave is shown. Further, the frequency spectrum V shown in FIG. 6(B) shows the frequency spectrum of the FM low-pass conversion carrier color signal obtained by frequency modulating the carrier wave with the low-pass conversion carrier color signal. Further, FIG. 7(B) shows a single wave number spectrum of a multiplexed signal of a low-pass conversion carrier color signal having a frequency spectrum indicated by ``■'' and a high frequency bias signal having a frequency spectrum indicated by ▪.

The upper limit frequencies (the highest frequencies in the frequency band necessary for recording) of the FM luminance signals shown in Figures 3(A) to 7(A) are shown in Figures 3(B) to 7(B), respectively. higher than the upper limit frequency of the other video signal shown.

Therefore, among the magnetic heads 16, 17° 19, and 20 shown in FIG. FMi1 on 16 and 19 respectively
Recording area W2 on the inner circumferential side where the speed signal is switched and alternately supplied every day, and where the above-mentioned relative linear velocity is small.
The magnetic heads 17 and 20 on the inner circumferential side that record signals on u*W2L are provided with the magnetic heads 17 and 20 shown in FIGS. 3(B) to 7(B), respectively.
The signals of any one of the five frequency spectra shown in (1) are switched every day and are alternately supplied. As a result, the outer recording area W1υ, WIL has an odd number.

The FM luminance signal of the even field is recorded, and two types of color difference signals of the odd and even fields are recorded in the inner recording area W2 u * W'2 L, as shown in Figs. 3(B) to 7(B). The frequency spectrum is recorded as one of the indicated frequency spectra.

In this way, according to this embodiment, the FM11 selected for wide band is not limited by the two types of color difference signals.
Only the color difference signals are recorded in the recording areas W+u and W+L on the outer circumferential side, respectively, and the two types of color difference signals are recorded as one of the predetermined signals shown in FIGS. 3(B) to 7(B). Since the FM 11 degree signal is recorded in the recording area W 2 u * W 2 L on the inner circumferential side, compared to the conventional recording method explained in conjunction with FIGS. 8 to 10, the FM 11 degree signal is recorded in a wider band. Also, since the luminance signal and the two types of color difference signals are recorded in separate recording areas (tracks), mutual interference and moiré that occur when the brightness signal and two types of color difference signals are simultaneously recorded on the same track are avoided. First, it becomes possible to record and reproduce color video signals of higher image quality.

Note that if field mode playback is not required, the disk 1 can be rotated at, for example, 1800 rpm and recorded on only one side (in that case, the outer recording area W + u of the upper recording surface (or lower recording surface) or WIL), the FM 8 degree signal is continuously recorded by the magnetic head 16 (or 19) forming a spiral track, and at the same time, the magnetic head 17 is recorded in the inner recording area W2U (or W2L).
(or 20), the two types of color difference signals are shown in FIG.
The data is recorded by continuously forming a spiral track in a predetermined signal format shown in any one of B) to FIG. 7B.

Next, a second embodiment of the present invention will be described. FIG. 2 shows the recording area, head arrangement, etc. of the second embodiment of the present invention.

In the figure, the same components as in Figure 8 are designated by the same reference numerals.
The explanation will be omitted. In FIG. 2, the bracket 22
In the radial direction of the disk 1, magnetic heads 23, 24 and 25 are mounted and fixed at fixed distances from the outer circumferential side to the inner circumferential side of the disk 1, respectively. Magnetic heads 27, 28 and 29 are mounted and fixed at a fixed distance from each other in the radial direction from the outer circumferential side to the inner circumferential side of the disk 1.

The magnetic heads 23 to 25 slide and scan the upper recording surface of the disk 1, and the distance between them is determined by the concentric recording areas WAu, Wau+W obtained by equally dividing the upper recording surface into three parts.
It is approximately equal to the length in the radial direction of each recording area of cu. On the other hand, the magnetic heads 27 to 29 slide and scan the lower recording surface □ of the disk 1, and the distance between them is concentric recording areas WAL and WBL obtained by dividing the lower recording surface into three equal parts.

It is approximately equal to the length in the radial direction of each recording area of the WCL.

In this embodiment, when considering field mode reproduction, the disk 1 is rotated at, for example, 3600 rpm,
The bracket 22 (magnetic heads 23 to 25) and the bracket 26 (magnetic heads 27 to 29) are intermittently moved forward for each field, and the magnetic head 23
25 and the magnetic heads 27 to 29 are switched and alternately supplied with video signals for each field, and the recording areas WAU, W8 u, and Wcu are supplied with the video signals by the magnetic heads 23, 24, and 25 that are not moving. For example, three types of video signals of odd fields are recorded separately forming concentric tracks in the lower recording area WAL.

We L, 'WCL has a magnetic head 27 that is not moving.
28.29, the three types of video signals of even fields are recorded separately forming concentric tracks.

Here, the above three types of video signals are three types of video signals that constitute a color video signal, and may be a combination of a luminance signal and two types of color difference signals, or a combination of three primary color signals. In the former case, the FM brightness signal and the RY signal (or I
A first FM' color difference signal obtained by frequency modulating a carrier wave with a signal) and a second FMa difference signal obtained by frequency modulating another carrier wave with a B-Y signal (or Q signal) are recorded. However,
Among these FM signals, the one with the highest upper limit frequency is FM
Ji degree signal, and the one with the next highest upper limit frequency is the first F.
This is an M color difference signal. Therefore, the FMH degree signal is recorded in the outermost recording areas WAU and WAL by the magnetic heads 23 and 27, and the first FM color difference signal is recorded in the middle recording areas WBLJ and WBL by the magnetic heads 24 and "28. The second FM color difference signal is recorded in the innermost recording areas Wcu and WCL by the magnetic heads 25 and 29.

On the other hand, when the above three types of video signals are three primary color signals, the first FM primary color signal obtained by frequency modulating the first carrier wave with the blue signal E6 and the second carrier wave with the red signal ER are frequency modulated. The second FM primary color signal obtained by modulation and the green signal Ec
The third FM primary color signal obtained by frequency modulating the third carrier wave is recorded in separate recording areas. Here, each band of the first to third FM primary color signals is the same, and the upper limit frequencies are the same. On the other hand, the luminance signal Ev is EY =
0.30ER+ 0.59Ee+0.11E
Since it is given by e, the weighting ratio of the three primary color signals forming the luminance signal EY is ER: EG: Ee -0,30: 0.59:
0.11, the ratio of the green signal Ec is the largest and the ratio of the blue signal E6 is the smallest. Therefore, the first FM primary color signal is recorded in the innermost recording areas Wcu and WCL by the magnetic heads 25 and 29, and the second FM primary color signal is recorded in the intermediate recording areas Wau and WBL by the recording heads 24 and 28. FM primary color signals are recorded in the outermost recording area W
The above third FM primary color signal is recorded on the AU and WAL by the magnetic heads 23 and 27. By recording in this way, the green signal, which has the highest weighting when composing the luminance signal among the three primary color signals, has the highest S/N.
This results in good reproduction, and a high-quality color video signal can be reproduced.

In addition, in FIG. 2, if field reproduction is not required, one of the magnetic heads 23 to 25 and 27 to 29 is unnecessary, and only the upper or lower recording surface is used. .

It should be noted that the present invention is not limited to the above-described embodiment, but the number of magnetic heads is four per side of the disk, the recording surface of the disk is divided into four, and the high frequency components of the three primary color signals are Three types of wideband FM signals obtained by frequency modulating the carrier waves separately and narrowband FM signals obtained by separately frequency modulating the low frequency components of the three primary color signals are frequency division multiplexed. The frequency-division multiplexed signal obtained from the above may be recorded separately in separate recording areas. Further, the rotating recording medium is not limited to a magnetic disk, but may also be a magneto-optical disk or the like.

Effects of the Invention As described above, according to the present invention, an upper limit frequency is set in each of the recording areas on a rotating recording medium in which two to four types of recording signals are divided into the same number of recording signals, according to the upper limit frequency. Since the recording signals with higher values are recorded separately in the outer recording area, it is possible to reproduce reproduced color video signals with an even better S/N ratio and higher image quality. Since the primary color signals with higher weighting (larger composition ratio) are recorded in the outer recording area, it has the advantage that a reproduced color video signal of higher image quality can be obtained.

[Brief explanation of the drawing]

1 and 2 are diagrams showing the recording area, head arrangement, etc. of each embodiment of the present invention, and FIGS. 3 to 7 are diagrams showing the frequency spectrum of the recording signal in the embodiment shown in FIG. 1, respectively. FIG. 8 to FIG. 10 are diagrams illustrating the conventional recording method of each individual. 1...Disc-shaped rotating recording medium (disc), 16°17
．． 19.20.23~25.27~29...Magnetic head, W+u, W+L, WALJ, WAL-outer recording area, W2 u, W2 L, WCU, WCL...inner recording area, We u, We L...Intermediate recording area.

Claims (3)

[Claims] (1) The recording surface of a disk-shaped rotating recording medium that is rotated at a constant frequency is divided into a plurality of concentric recording areas, and two or more types of signals that make up a color video signal are converted into a predetermined signal format. Among the two to four types of recording signals, the two to four types of recording signals are arranged so that the recording signal with a higher upper limit frequency or weighting is recorded in an outer recording area among the plurality of recording areas. 1. A method for recording video signals on a rotating recording medium, characterized in that video signals are recorded on the plurality of recording areas separately by separate heads according to an upper limit frequency or weighting. (2) The two or more types of signals constituting the color video signal are a luminance signal and two types of color difference signals, and the two to four types of recording signals are obtained by frequency modulating a carrier wave with the luminance signal. 2 or 3 types of signals including a frequency modulated luminance signal, and the frequency modulated luminance signal is recorded in the outermost recording area of the rotating recording medium according to claim 1. Video signal recording method. (3) The two or more types of signals constituting the color video signal are three primary color signals consisting of a blue signal, a red signal, and a green signal, and the two to four types of recording signals are the blue signal, red signal, and green signal. The first wave obtained by frequency modulating the carrier waves separately with
The first frequency modulated wave signal, which is a third frequency modulated wave signal and uses the blue signal as a modulating signal, is recorded in the innermost recording area of the three recording areas, and the red signal is recorded in the innermost recording area of the three recording areas. The second frequency modulated wave signal, which is used as a modulation signal, is recorded in an intermediate recording area, and the third frequency modulated wave signal, which is the green signal that has the highest weighting among the three primary color signals that constitute the luminance signal, is recorded as a modulation signal. A method for recording video signals on a rotating recording medium according to claim 1, characterized in that the signal is recorded in the outermost recording area.