JPS6065694A - Yc component recording and reproducing system - Google Patents

Abstract

PURPOSE:To improve the picture quality and the utilizing factor of a recording medium by separating a color television video signal into a luminance signal component and a chrominance signal component and recording/reproducing each component onto an independent video track. CONSTITUTION:When a magnetic head 2 reaches a point A, a luminance signal component Y1 is applied to the head 2 while the head 2 scans points from the point A to a point B by using a drum pulse (not shown in figure), and the signal applied to the head 2 is switched from the signal component Y1 to a chrominance signal component C2 by using the drum pulse when the head 2 reaches the point B. Thus, a video track (a) on which the signal component Y1 and the signal component C2 are recorded onto the independent video track is formed on a tape 4. The drum pulse switches selectively heads 2, 3, 4 and a reproducing system at reproduction. The interference between tracks is decreased by arranging the heads 2, 3, 4 so as to make the azimuth angle different from each other.

Description

DETAILED DESCRIPTION OF THE INVENTION (Subject of the Invention) The present invention provides YC components 1 to 1 that separate a color television video signal into a luminance signal component and a color signal component, and record and reproduce each signal component on an independent video track. Concerning recording and reproducing methods.

(Purpose of the Invention) The present invention (j improves image quality and improves magnetic recording 11Xj
To provide a YC component recording and reproducing method which is capable of improving the utilization rate of the body, and which requires no special signal processing and can be realized with a simple circuit configuration because of real-time recording and reproducing. What is the purpose of something?

(Contents of conventional examples and their shortcomings) Due to advances in electronic technology, helical scan type consumer video recorders (hereinafter referred to as VTRs) have become more popular.
It is starting to become widespread. In this consumer \/TR, the brightness signal of the Nonora television video signal is generally
The carrier color signal is frequency-converted to the FMM luminance signal low frequency side, and this low frequency modulated carrier color signal 8 is converted to the FMM luminance signal low frequency side. The superimposed signal superimposed on the Syotan from which the are doing.

In this seventh step, since the low frequency component of the M brightness signal cannot be recorded and replayed, faithful recording and reproduction of the opening signal is not possible.
l, it was.

Furthermore, since the carrier color signal is recorded and reproduced as a small bone signal superimposed on the low frequency side of the FMM luminance signal, it is not possible to wait for a sufficient band, resulting in poor image quality.

Therefore, in order to solve the above-mentioned problems, the conventional iiq
A system has been considered to improve the image quality by recording the color signals (parallel type) and the carrier color signal on a separate rack in parallel (parallel type). For example, N = 1 format 1~, Betacam, etc. recording/reproducing system (f, I + degree 1 word τ) and conveyance signal 8 are recorded in parallel in another adjoining bidet 71'l rack, and each If the bidet's first to rack interference (crosstalk)
To achieve this, it was necessary to install a card (Z-band) between the bidet 711 and the rack.However, since this sword band is not directly involved in recording and reproducing, the utilization rate of the magnetic recording medium is low. This has the drawback that the recording density decreases and it is difficult to improve the recording density.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention uses a helical scan video signal magnetic recording and reproducing method in which magnetic heads for recording video signals are arranged at equal angular intervals of 120°. (a) A magnetic recording medium is spliced and wound around a rotating body of 240° with a square concave, and the color television image 15 J: is separated.
The video signal recording magnetic head records the signal component converted into a predetermined signal format and the color signal component separated from the color television video signal and converted into the predetermined signal format onto the magnetic recording medium. A period from when the magnetic head for recording the video signal rotates 120 degrees from the start of scanning of the magnetic recording medium to when it finishes scanning. By switching the selection between two scanning periods, the video 1 &! (; The signal component is supplied to the magnetic head for recording, and the signal component of the stomach <
Sea urchin J: Composed of sea urchin.

(Embodiment of the Invention) FIG. 1 is a diagram for recording a recorded image of the first embodiment of the YC::1 system according to the present invention, and FIG. 1 is a diagram schematically showing a bidet Δ1-rack formed by a first embodiment of a recording/reproducing method for a YC component 1 according to the present invention; FIG.

In Fig. 1, there is J3, 1 (drum), 2, 3.4 (, 1//), magnetic head for recording and reproducing Shinkyu, and 5 +a tape.

As shown in FIG. Iru 1, Ko 1
:ta,1 ram 1(,1, tape 5 which is a cheerful recording medium
are wound around each other at 240°.

This drum 1 is rotated by a motor (not shown in FIG. 1) in the direction of the arrow shown in FIG. It's rotating.

The magnetic rad 2 reaches point A due to the rotation of the drum 1, starts scanning over the Arp 5, rotates 120 degrees, reaches point B, rotates another 120 degrees, reaches point 0, and ends the scanning. At this time, since the magnetic head 4 is provided at a position 120 degrees behind the magnetic head 2, when the magnetic head 2 reaches point B, it reaches the Δ point and starts scanning in the same way as the magnetic head 2. . J: From 3 magnetic heads to 4 magnetic heads 12
Since the magnetic head 4 is moved to a position 0° backward η-, when the magnetic head 4 reaches the point B, it reaches the Δ point, and similarly to the magnetic head 2, it includes scanning intermittently.

Note that Drano 1 has magnetic heads 2, 3, . For example, a magnetic magnet such as a magnet is attached to detect the position of /I, and a magnetic helad for position detection is installed around the tram 1 to detect the magnet. I'm getting fucked. (Not shown in Figure 1) The rotation of the drum is detected by the magnetic head and magnet for position detection, and the pulse for detecting the rotational phase is the pulse for detecting the rotational phase. Hereinafter, this will be referred to as a drum pulse.

For example, the above drum pulse is output when the magnetic head 2 reaches point Δ, when the magnetic head 3 reaches point A, and when the magnetic head 1 reaches point A.

Magnetic head 2, magnetic head 3, and magnetic head 4 are 120
° Since they are taken at equal angular intervals (= 1), when the magnetic head 2 reaches point B, the magnetic head 4 reaches the Δ fish, and (
When the magnetic head 3 reaches the 13th point, the magnetic head 2
When the positive head 4 reaches point B, the magnetic head 3 has reached point △, and when the magnetic head 2 reaches point 0, the magnetic head 3 has reached point A, magnetic head 3
When the magnetic head 4 reaches the 0 point, the magnetic head 4 has reached the Δ point, and when the magnetic head 4 has reached the C fish, the IJ & air head 2 has reached the Δ point. .

Therefore, as mentioned above, 1. lt mind head 2<3. /l
) reaches the 8th point, outputs a drum pulse. By doing this, magnetic head 3 (/'I, 2) is at point B and magnetic head /I (2, 3) is at 0. Reaching the point can be detected by drum pulses.

The recording process will be explained below. The drum pulse generated when the magnetic head 2 moves from point A to point B
One minute of the luminance signal component converted into a predetermined recording format is supplied to the magnetic head 2 while scanning to the point B, and the supply signal supplied to the magnetic head 2 by the drum pulse generated when the point B is reached is described above. By switching from the luminance signal component Y1 that has been recorded to the color signal component C2 that has been changed to a predetermined recording format, the luminance signal component Y1 is recorded on the tape 4 as shown in FIG.
Video racks 1 to rack a are formed in which the color number 1g component C2 is recorded on an independent video rack.

Also, the magnetic head 3 (4) is the same as the magnetic head 2 (,)2.
By performing the following movements, bidet 1st to easy b (C)
form. The formation of this video track b(c) starts from the verse where the recording of the luminance signal component Y1(Y2) of the video 1-rack a(b) is completed.

Ru.

In this way, as shown in Figure 2, the 8 components Y
It is possible to form video tracks 1 to 1 in which the color signal component C and the color signal component C are recorded on independent video tracks.

Table 1 below shows the correspondence between the magnetic head for recording and reproducing video signals and the video track.

However, as shown in FIG.
As shown in Table 1, the brightness signal component in the middle)/2 corresponds to the carrier color signal component c2 in the video tracks 1 to 1, and the brightness in the same video track. signal component Y
and the color signal component C have a corresponding relationship.
The luminance signal component Y in the first frame of a certain bidet has a correspondence relationship with the color signal component C in the bidet 711 to rack (front).

Next, we will explain about playback. Reproduction n:'i Same as in the recording described above, that is, when the brightness signal component Y on the tape 5 reaches the scanning start point of the video tape 1 to rack 5 recorded at 8 points, the output of the magnetic head is The signal component is i1′il
Since it is an i degree signal component, the magnetic spatula 1 to 1) 117. )
The re-gyushin bow is supplied to the reproduction system that processes the signal component Y at 1lili degree, and when it reaches point B (the scanning start point of the rack to the video 1 where the color signal component C on the tape 5 is recorded), the magnetic Since the output signal of the head is a color signal component, the color signal component C is sent from the magnetic head to the reproduction system where it is processed 1Δ.
By turning the drum pulse to select 1% to connect the magnetic head 2, 3, 4, etc. to the magnetic head 2, 3, 4, etc., to the magnetic head 2, 3, 4, etc. It is possible to play back the recorded message 8.

El, ta, magnetic head 2, magnetic head 3, positive head 4
By arranging 1- azimuth angles of J: uni, magnetic l\rad, 3.4, each bidet Δ
Reduce interference (crosstalk) between tracks! can be done. Therefore, the guardband should be
- No need to install between racks.

FIG. 3 is a block diagram of a first embodiment of the VC component 1 to recording/reproducing system according to the present invention.

In Fig. 3, 6 is a video signal input terminal, 7 is a (j, luminance signal/1)σ fading signal separation circuit, 8 is a pre-emphasis circuit, 9 is an M modulator, 10 is a head switch T, and 11 is a frequency converter. , 12 is an FM demodulator, 13. 14. 15
1 (magnetic head for recording J4 signal, 16.17.1
8 is a magnetic head for reproducing video signals (However, the magnetic head 2 for recording and reproducing video signals shown in FIG. Magnetic head 1G for reproduction and IJ'U are described, and magnetic head 3 for video signal recording and reproduction is shown in 11.
The magnetic spatulas 1 to '14 for recording video signals (1G) and the magnetic head 17 for reproducing video signals, the magnetic head 4 for recording and reproducing video signals (1Z), the recording head 15 for recording 194Jl/nd switch, 20 is N1 demodulator, 21 is de-emphasis circuit, 22 is Luminance transmission/'1 general color transmission signal mixing circuit, 231,,I;
An FM modulator, 24 an iJi frequency converter, and 25 a video signal input terminal.

First, the recording system of the first embodiment of the recording and reproducing method for the VC combo screw 1 according to the present invention shown in FIG. 3 will be explained.

The signal input terminal 6 is connected to a 1Ivi degree signal/carrier color signal (hereinafter referred to as Y/C) separation circuit 7.
111), the pre-emphasis circuit 8 is connected to the FM2 modulator 9
The FM modulator 9 is connected to the head switch 10.

Also, )/,,/C part 11 circuit 7 is frequency converter 1
1, the frequency converter 11 is connected to the 1M modulator 12, and the 1M modulator 12 is connected to the head switch 10.

The head switch 10 is a magnetic head 13 for recording blood donation signals.
．． Connected to 14.15.

The color television video signal input from the video signal input terminal 6 (hereinafter referred to as 111 is a color video signal (noted as /j + Shinkyu)
TI) is input to the Y/'C separation circuit 7, and Y 7 C
One circuit 7 divides the signal into a luminance signal component and a carrier color signal component. .

The eight luminance signal components output from the Y//C separation circuit 7 are supplied to a pre-emphasis circuit 8, and the pre-emphasis circuit r
The FM modulator, whose high frequency components are enhanced at 8, undergoes frequency modulation such that the sync depth level and the why 1 to peak peak levels each become predetermined frequencies. The FM luminance signal (modulated wave) output from the FM modulator 8 is supplied to a head switch 10 at a predetermined level of 1v through a recording amplifier (shown in FIG. 3!f) and the like.

The carrier color signal component output from the 11 circuit 7 is frequency-converted to a predetermined frequency by the frequency converter 11, and then supplied to the FM modulator 12.
The modulator 12 receives frequency modulation such that the sync tip level and the bow 1 to peak peak levels are each 1″L predetermined frequency. The low signal modulated wave) is brought to a predetermined level through a recording amplifier (1 shown in FIG. 3), etc., and is then fed to the head switch 10 (jζ).

The head switch 10 connects the magnetic head 2 (magnetic head 13)
and magnetic head 3 (magnetic head 14) and magnetic head 4
From the FM modulator 9 and the M modulator 12, the luminance signal component and the carrier color signal component can be recorded on the tape 5 in the J-rack pattern shown in FIG. 2 by the magnetic head 15. 13.14.15 The magnetic head for recording by selectively switching the supplied signal according to the drum pulse.
Supply j: It is configured as follows.

In other words, the head switch 10 is the magnetic head 2 (magnetic head 13) shown in FIG. Indicates point A, point B, and point 0. ) △ point (for example, the second
When the bidet Δ1 shown in the figure reaches the recording start point of the luminance signal component Y of rack a, the drum pulse causes
The selection is switched so that the "N.1 brightness signal from the modulator 9 is supplied to the air sampling head 2 (magnetic head 13). Therefore, the FM luminance signal from the M modulator 9 is supplied to the magnetic head 2. (
The magnetic head 13) records the brightness signal component Y1 on the Arp 5, for example, for bidets 1 to rack a shown in FIG.

Also, at this time, since the magnetic head 3 (magnetic head 14) has reached point B, the FM1 general send signal from the FM modulator 12 is transmitted to the magnetic head 3 ( The selection is switched so that the magnetic head is supplied to the magnetic head 14). Therefore, the FM from FM modulator 12
The conveyed color signal is recorded on the retape 5 by the magnetic head 3 (magnetic head 14) (for example, as the /NN transmission signal component C1 of the bidet 1 to rack a shown in FIG. 2). .

Furthermore, the drum 1 rotates and the magnetic head 2 (magnetic head 1
3) reaches point B, head switch 101511~
By the ram pulse, "j~・1" from the FM modulator 12
Transport 3
M modulator 12] Japan's F M III'! 3')”
=The color signal is sent to the j-p 5-1 by the magnetic head 2 (daytime moxibustion air 13), for example, to the bidet A1 shown in FIG. It will be done.

Also, in this poem, magnetic head 4 (magnetic head 15) is A.
The magnetic head 4
(magnetic head 15).

Therefore, the FM1I degree signal from the FM modulator 9 is recorded on the tape 5 by the magnetic head 4 (magnetic head 15) as, for example, the brightness signal component Y2 of the bidet 1 to rack b shown in FIG. Ru.

1) as shown in Figure 2; Video 1
~Can form a rack.

Next, the reproduction system of the first embodiment of the YC component recording and reproduction system according to the present invention shown in FIG. 3 will be described.

Movie kJ! (Magnetic head for Δ8 playback 16.17.18
is connected to the head switch 19.

The head switch 19 connects to the FM demodulator 20 and
The M demodulator 20 is connected to a de-emphasis circuit 21,
The di-T interface circuit 21 is the y/Ciff combiner circuit 2.
Connected to 2.

The 1M demodulator 23 is connected to the frequency converter 24, and the frequency converter 24 is connected to the Y2,'C mixing circuit 22.

The Y/C mixing circuit 22 is connected to a video signal output terminal 25.

The head switch 19 is the magnetic head 13 for recording video signals.
．． 14.15, the luminance signal components and 1(θ
) In order to reproduce the FM signal q component, the FM signal 1 reproduced by the magnetic head 16.
9 signal and FM transport area signal from drum pulse 1)
The FM demodulator 20 and the 1M demodulator 23 are supplied with the FM demodulator 20 and the 1M demodulator 23, respectively.

In other words, the head switch 19 causes the magnetic head 2 (magnetic head 1G) to move to point Δ (during the recording of bidet 1 to rack a(1') pyroxene 1 component Y1 shown in FIG. 2 & 4i bit 1). When the output signal IJ, l, -i + polishing signal component of the magnetic head 2 (magnetic head 1G) is generated, the reproduction [M brightness signal] from the magnetic head 12 (magnetic head 16) is is FM demodulation j! Select one monme so that it is supplied to f120. Therefore, the signal recorded in the magnetic head 2 (magnetic head 1G) as the luminance signal component Y1 of the video 1-rack a shown in FIG. 2, for example, is reproduced in the retainer 5.

Also, at this time, the magnetic head 3 (magnetic head 17) has reached point B (the recording start point of the conveyed color signal component C1 of the video track a' shown in FIG. 2). Since the output signal of the magnetic head 17 is a carrier color signal component, the head switch 19 controls the drum pulse so that the reproduced FM carrier color signal from the magnetic head 3 (magnetic head 17) is supplied to the 1M demodulator 23. Switch selection.

Therefore, the magnetic head 3 (magnetic head 17) causes the tape 5. For example, the signal recorded as the carrier color signal component CI of the video track a- shown in FIG. 2 is reproduced.

Furthermore, as the drum 1 rotates, the magnetic heads 1 and 2 (magnetic head 16) turn B, and the bidet first head a (a) shown in FIG.
r) When reaching the recording start point of the conveyed color signal component C2, the output signal 1:J: l of the magnetic head 2 (magnetic head 16)
+23ff1 color (8'f+ in Hz component, so the head switch 19 is set to drum pulse) so that the reproduced FM 1112i signal from the magnetic head 2 (magnetic head 1G) is supplied to the FM demodulator 231. Switch the selection to .

Therefore, the magnetic head 2 (magnetic head 1G) reproduces the signal recorded on the tape 5 as, for example, the transport color signal component C2 of bidets 1 to rack a shown in FIG.

Also, at this time, the magnetic head 4 (magnetic head 18) has reached the point Δ (the start point of the recording amount of the luminance signal component Y2 in the bidet 1 to rack ba shown in FIG. 2), and at this time, the magnetic head Since the output signal fl of the magnetic head 18 (magnetic head 18) is the brightness signal component, the head switch 19 receives the drum pulse, and the reproduced FM brightness signal from the magnetic spatula Iζ4 (magnetic head 1B) is supplied to the FM demodulator 20. (so that) n selections are selected. Therefore, the magnetic head 4 (j, ii magnetic head 18
), the signal recorded on the tape 5 as, for example, the luminance signal component Y2 of the bidet first rack b shown in FIG. 2 is re-cooled.

19
By operating the reproducing magnetic heads 16, 17, and 18, the color video signal recorded on the tape 5 can be reproduced.

The FM luminance signal outputted from the head switch 19 is supplied to the M demodulator 20 as a signal at a predetermined level via a regenerative amplifier (not shown in FIG. 3), and is FM demodulated by the FM demodulator 20. After being de-emphasized 'j82
1. The de-emphasis circuit 21 is designed to attenuate the high frequency components amplified by the pre-emphasis circuit 8 and return them to the original signal, and the output horn signal is supplied to the Y/C mixing circuit 22. I'm sleeping.

F M Ift' output from the head switch 19
The im color signal is sent to the FM demodulator 23 as a signal at a predetermined level through a regenerative amplifier (not shown in FIG. 3), etc.
! After being subjected to FM demodulation by the M demodulator 23, it is supplied to the frequency converter 1@! converter 24. The output signal is supplied to the Y,/C inquiry circuit 22.

)//C mixing circuit 22 mixes the reproduced color signal and the reproduced general color signal and sends the reproduced color video signal to the video signal output terminal 2.
Supply to 5. Therefore, the reproduced color video signal is output from the video signal output terminal 25.

FIG. 4 is a block system diagram of a second embodiment of the recording and reproducing method (VC component according to the present invention).

In FIG. 4, the same components as in FIG. 3 are designated by the same reference numerals and their explanations will be omitted.

The second embodiment is an FM modulator 12 in the components of the first embodiment.
The configuration is such that the FM demodulator 23 and the FM demodulator 23 are excluded.

In other words, in the first embodiment, both the luminance signal component and the carrier color signal component are FM-modulated, recorded, and reproduced in FM Fi mode, whereas the second embodiment
Only the 17F stone signal component is FM modulated and recorded.
Playback in iFa tone: It is configured as follows. Second Embodiment (Compared with the first embodiment, only the signal processing of the carrier color signal component to be recorded and reproduced is different. In the first embodiment, after frequency conversion, FM modulation is performed. After supplying the carrier color signal component to a magnetic head for video signal recording and recording it on the tape 5, and reproducing the carrier color signal component recorded on the tape 5 using the magnetic head for video signal reproduction and performing FM demodulation, In contrast, in the second embodiment, the frequency-converted carrier color signal was recorded on the tape 5 by a magnetic head for recording video signals, and was recorded on the tape 5 by a magnetic head for reproducing video signals. The carrier color signal component is frequency-converted after being reproduced.Therefore, since the signal processing of the carrier color signal component is the same as that of the first embodiment, a description thereof will be omitted.

FIG. 5 is a block diagram of a third embodiment of the recording and reproducing method for the YC component 1 according to the present invention.

In FIG. 5, the same components as those in FIG. 3 are designated by the same reference numerals and their explanations will be omitted. 26 is a decoder, 2
7 is a pre-emphasis circuit, 28 is an FM modulator, 29 is a pre-emphasis circuit, 30 is an M modulator, 31 is a band pass filter (hereinafter referred to as BPF), 32 is an adder, 33 is a pre-emphasis circuit, 34 is the N.1 variable frequency generator, 35 is the BPF, 3G (FM), 37 is the de-emphasis circuit, 38 is the encoder, 39 is the BP
41 is a de-emphasis circuit, J is an FM demodulator, 44 is a de-emphasis circuit.

First, the recording system of the third embodiment of the YC component recording and reproducing system according to the present invention shown in FIG. 5 will be described.

The video signal input terminal 6 is connected to the decoder 2G, the decoder 2G is connected to the pre-emphasis circuit 27, the pre-emphasis circuit 27 is connected to the FM modulator 28, and the decoder 2G is connected to the FM modulator 28.
The M modulator 28 is connected to the head switch 10.

The decoder 2G is connected to a pre-emphasis circuit 29, and the pre-emphasis circuit 29 is connected to an FM modulator 30.
M variable Ml"i unit 30L1: Connected to B p F 31, and BPF 31 is connected to adder 32.

Decoder 2G is connected to Brien 7292 times 2+f33, connected to 33 pre-emphasis circuits and 1M modulator 34, F~1 modulator 34 is connected to 13P'F35, and BP
F3! i is connected to the adder 32.

Adder 32 is connected to head switch 10.

The head switch 10 is a magnetic head 13 for recording video signals.
．． 14.1', connected to +.

A color video signal containing a luminance signal component, a fading signal component, etc. is input to the video signal input terminal 6. The color video signal input from the video signal input terminal 6 is sent to the decoder 2.
6, and decoder 2G converts the luminance signal component and R-Y
It is separated into a color difference signal component and an r3-Y color difference color signal component.

After the brightness signal component output from the decoder 2G has its high frequency component enhanced by the pre-emphasis circuit 27,
The FM modulator 28 applies frequency modulation to the sync tip level and the voice level to the peak level so that each has a predetermined frequency. The FM luminance signal (modulated wave) outputted from the FM modulator 28 is brought to a predetermined level through a recording amplifier (not shown in FIG. 3), etc., and then fed to the head switch 10 as fl.

Further, the R-Y color difference signal component output from the decoder 2G is sent to the pre-emphasis circuit 2 where the high frequency component is amplified, and then fed to the FTS4 modulator 30 at fJt.
In the FM modulator 30, the sync tip level and the white peak level each receive predetermined frequency modulation.The FMR-Y color difference signal (modulated wave) output from the FM modulator 30 and 11 is supplied to the adder 32 via the BPF 31.

Further, the B-Y color difference signal component outputted from the decoder 2G has its high frequency component enhanced in a pre-emphasis circuit 33, and then is supplied to a 1M modulator 34 and F
In the M modulator 34, the sync deep level and peak level are respectively set to predetermined frequencies.
Receiving frequency modulation (FMB-'YM color difference signal modulated wave output from 1M modulator 34) is B P F 35
is supplied to the adder 32 via.

The adder 32 adds the FM color difference signals fed from the apr'3+ and 13PF35. After the water is brought to a predetermined level with a rod, it is supplied to the head switch 10.

10 head switches 2 magnetic heads (magnetic head 13)
1 to 1 as shown in FIG.
rack pattern (however, in the third embodiment, the video shown in FIG. The signals supplied from the FM modulator 28 and the adder 32 are selectively switched by drum pulses so that the luminance signal component and the additive color difference signal component can be recorded on the tape 5'' and sent to the recording magnetic head 13, 14, 15. Supply J: Sea urchin let is made.

In other words, when comparing the third example and the first example, the first example
In the embodiment, an FM carrier color signal is supplied as a color signal component to the magnetic heads 13, 14, and 15 for recording video signals, whereas in the third embodiment, a continuous FM color difference signal is supplied. Therefore, in the third embodiment, only the color signal components supplied to the video signal recording magnetic heads 13, 14, 15 are different from the first embodiment, so that the video signal recording magnetic spatulas 1513, 14. 1! The operation of the head switch 9 when scanning the tape 5 with i to form the bidet and rack is the same as in the first embodiment, and its explanation will be omitted. However, in the first embodiment, the conveyed color signal component was recorded by scanning the tape 5 while the magnetic head for recording the video signal rotated from point B to point C shown in FIG. On the other hand, in the third embodiment, eight components of the added value difference signal are recorded.

Therefore, the magnetic head 2 and) 1 air head 3 and l1k
The I/F modulator 28 and adder 32 are connected to the air head 4.
By selectively switching eight bows using drum pulses and supplying one to each other, it is possible to record in a bidet '7J1 to rack pattern as shown in FIG.

Next, the VC-1 according to the present invention shown in FIG.
~The reproduction system of the third embodiment of the recording and reproduction method will be explained.

Movie 1! '9 Magnetic head 1G for playback, 17.110
, 1: Connected to one head switch.

Head switch 191:j, connected to FM demodulator 3G, FN=1 demodulator Kaoru 3G is connected to IENF 7'7 cis circuit 3
7 and is connected to the diennoassist circuit 371 and the encoder 38.

Head switch LD+, J: B P F 3! 39 is connected to the FM demodulator 40, and the FM
The demodulator 40 is connected to the de-emphasis circuit 41 and to the de-emphasis circuit 41 [jen=1-da 38.

/＼・ND switch 19 is connected to BPF42, and BPF
42 is connected to an FM demodulator 43 , the FM demodulator 43 is connected to a de-emphasis circuit 44 , and the de-emphasis circuit 44 is connected to the encoder 38 .

J, t, encoder 38 is l! ! It is connected to the I8 image signal output terminal 25.

The head switch 19 records the image (as shown in FIG. 2 by the magnetic heads 16, 17, and 18 for recording the g+ signal) on the tape 5 in a luminance signal component and an additional f3 color difference signal. Magnetic head 16.1 for video signal reproduction so that the components can be reproduced. , 18 are reproduced /ζ "M luminance signal and addition" M color difference signal are selectively switched by drum pulses and output to FMlO adjusters 3G and B, respectively.
Pl"39. 4.1 to supply to B P F42
．． ; has been accomplished.

Here, a magnetic head 1G for reproducing a reproduced video signal.

17 and 18, the operation of the head switch 19 when reproducing the signal recorded on the video track by scanning the top of the arp 5 (Y1) is the same as in the first embodiment described above, so M(A) Explanations are omitted.However, in the first embodiment, the magnetic head for Eizo Shingetsu IT'i is connected to the tape 5 shown in FIG.
Bidet 1st to easy C (part where 2 signal components are recorded)
In contrast to the 1+12 color feed signal component being reproduced by scanning the portion , in the third embodiment, the additive difference signal component is being reproduced.

Head switch 19 output FM brightness signal 8t,
The signal is brought to a predetermined level through an I/Q amplifier (not shown in FIG. 3), etc., and is supplied to an FM receiver 37 where it is modulated to FM 1M by an FM receiver 36. The de-emphasis circuit 37 is provided to attenuate the high frequency components enhanced by the pre-emphasis circuit 27 to return the original signal by 1, and its output signal is
- I was farted by a group 38.

The added FM color difference signal output from the output switch 19 is then passed through an amplifier (not shown in Figure 3), etc.
- B P F 3 or B
It is supplied to the N11 demodulator 40 or the M demodulator 43 via the PF12, and the FM demodulation tH40 is output.
M demodulator 43-vF M +<U modulated RY and B-
The Y color difference No. 13 is supplied to a de-emphasis circuit 41 and a de-en-no-assist circuit 44. The output signal is supplied to a decoder 38.

The encoder 38 +, the luminance signal component divided by the I decoder 26, the R-Y color difference signal component, and the B-Y color difference signal component are combined 1] to output the reproduced color video signal as a video signal j, jii. child 25. Therefore, the reproduced color video signal is output from the video signal output terminal 25.

FIG. 6 is a block system diagram of a fourth embodiment of the YC component recording/reproducing method according to the present invention.

6, the same components as in FIGS. 1 and 5 are given the same reference numerals and their explanations will be omitted.

45 wire sequential converter, 4G is pre-emphasis circuit, 4
7 (FM modulator, 48 t; J: FM demodulator,
49 is an FM demodulator, 50 is a de-emphasis circuit, 51
is a Vermutaire, 52Lt 11-1 delay circuit.

The fourth embodiment differs from the third embodiment only in signal processing of color signal components. Therefore, only the signal processing of the color signal components will be explained.

First, the recording system of the fourth embodiment will be explained.

The digital converter 1-2G is connected to a line sequential converter 45, and the line sequential converter 45 is connected to a pre-emphasis circuit 46.

The pre-emphasis circuit 4G is connected to the FM modulator 47,
FM modulator 47 is connected to head switch 10.

Head switch 10C 1τ2 Shintan recording magnetic head 13.14.15 to 11? It's threaded.

A color video signal including a luminance signal component and a carrier color signal component is input to the video signal input terminal 61.The color video signal input from the video signal output terminal 6 is input to the decoder 2G and is converted into data. The signal is divided into 1-2G luminance signal component Y, RY color difference signal component, and B-YC2 difference signal component.

Here, the signal processing of the luminance signal component output from the decoder 2G (-1 is the same as in the third embodiment, so the explanation thereof will be omitted.

The R-Y color difference signal component and the B-Y color difference signal component outputted from the Te'coder 2G are supplied to a line sequential converter 45.

The line sequential converter 45 converts the decoder 26 by drum pulses.
The R-Y color difference signal component and the B-Y color difference signal component supplied from are combined to output a line-sequential color difference signal component, which is supplied to the pre-emphasis circuit 4G. After the high frequency components of this line-sequential color difference signal component are amplified by a pre-emphasis circuit 46, they are supplied to an M modulator 47, and are sync-deep by the modulator 47. The signal level is subjected to frequency modulation such that each level becomes a predetermined frequency. FM HenliI! The FM line sequential color difference signal (modulated wave) output from the head switch 1
0.

In other words, in the third embodiment, the FM-modulated RYY color difference signal and the B-Y color difference signal are combined in the cylinder 32 and the 0[M color difference signal is supplied to the head switch 161). , in the fourth embodiment, the R-Y color difference signal and the B-Y
After the color difference signal is converted into a line sequential color difference signal by the line sequential converter 45, the FM line sequential color difference signal subjected to ',jFM modulation is supplied to the head switch 16. Therefore, the difference in the regeneration system between the fourth embodiment and the third embodiment is that the head switch 1
Since only the color signal component is supplied to the video m signal recording magnetic heads 13, 14. The operation of the head switch 10 when scanning the i5 tape 5 to form the bidet first rack is the same as in the third embodiment, and its explanation will be omitted. Further, the bidet racks 1 to 1 to be formed are as shown in FIG. 2, similar to the third embodiment. However, in the third embodiment, the additive color difference signal component was recorded by scanning the tape 5 while the magnetic head for recording the video signal rotated from point 8 to point 0 shown in FIG. In contrast, in the fourth embodiment, line-sequential difference signal components are recorded.

Next, YC components 1 to 1 according to the present invention shown in FIG.
The reproduction system of the fourth embodiment of the recording and reproduction method will be explained in detail.

Magnetic heads 1G, 17.18 for reproducing video signals are connected to a head switch 19.

The head switch 19 is connected to the FM demodulator 49, and the FM
The demodulator 49 is connected to a de-emphasis circuit 50, the de-emphasis circuit 50 is connected to the vermu data 51,
Permeco data 51 is connected to encoder 38,
An 11'' Rinobu circuit 52 is connected to the Vermu data 51.

Further, the encoder 38 is connected to the video signal output terminal 25.

1 head switch, 1 magnetic head for recording video signals
Magnetic heads 1G, 17 and 18 for video signal reproduction are used to reproduce the luminance signal component and line-sequential color difference signal component recorded on the tape 5 in the track pattern shown in FIG. The FM luminance signal and the FM line sequential color difference signal reproduced by the FM luminance signal and the FM line sequential color difference signal are selectively switched by drum pulses and supplied to the FM demodulator 3G and FM demodulator 49, respectively.

Here, magnetic heads 16° 17 for reproducing reproduced video signals,
Movement 1' of the head switch 19 when scanning the tape 5 at step 18 and reproducing the signals recorded on the video tapes 1 to 18.
+ is the same as in the first embodiment described above, so its explanation will be omitted. However, in the first embodiment, the magnetic head for reproducing the video signal scans the portions of the tape 5 shown in FIG. While the signal component was regenerated, the fourth
In the embodiment, line-sequential color difference signal q components are reproduced.

F M M! output from one head switch! il sequential signal is converted into a predetermined one novel through a sequential signal amplifier (not shown in FIG. 4), etc., and is supplied to the M demodulator 49,
The line-sequential color difference signal components subjected to the F M quadrupler in the demodulator 49 are supplied to a de-emphasis circuit 50 . The tie-emphasis circuit 50 is provided to attenuate the high frequency component enhanced by the pre-emphasis circuit 4G and return it to the original signal, and its output signal +:1 is supplied to the permicotede 1.

The line-sequential color difference signal component output from the de-emphasis circuit 50 has the R-Y color difference signal component and the B-Y color difference signal component arranged line-sequentially.
It is necessary to separate the signal into color difference signal components.

Permico booter 51 and 11-1 delay circuit 524. J:
The line-sequential color difference signal component in which the R-'l' color-difference signal component and the B-Y color difference trust component are arranged line-sequentially is stored in R-11-1.
Y ('= difference signal component and B-Y color difference signal component exist [
The RY color difference signal component output from the permu data 51 and the B-, Y color difference 1.1 component are supplied to the encoder 48.

The encoder 48 combines the luminance signal component separated by the decoder 2G, the RY color difference signal component, and the 13-Y color difference signal component, and outputs the reproduced color video signal to the video signal output terminal 2.
5. Supply and cover. Therefore, the reproduced color video signal is output from the video signal output terminal 25.

In addition, in the above-mentioned first to fourth embodiments (,
1. Bidet 1-1 in which the luminance signal component and color signal component are independent
Since it is easily recorded in real time, in order to convert the color signal component frequency-converted to a low frequency into the luminance signal component,
There is no need to remove the low frequency component of the luminance signal component,
Since a -1- minute band can be secured for the luminance signal component, more faithful recording and reproduction of the luminance signal component is possible. :11. Sufficient bandwidth can be secured for color signal components, and since real-time recording and playback is performed, no circuit elements such as a time axis compression circuit are required.

The overall circuit configuration can be simplified.

Furthermore, if the azimuth angles of the magnetic head 2, magnetic head 3, and magnetic head 4 are configured to be different from each other, the interference (cross [hake]) between the luminance signal component and the color signal component will be reduced. Therefore, there is no need to provide a guard band that is not directly involved in recording and reproducing, thus improving the utilization rate of the magnetic recording medium and enabling high-density recording and reproducing. .

In addition, compared to the recording/reproducing method described in (Contents of Conventional Examples and Their Disadvantages), the magnetic head for recording CO video signals forms the magnetic recording medium once. By recording the 8 components of ilip1 and the color signal components in an independent video track during the video track, the utilization rate of the magnetic recording medium is improved and high-density recording and reproduction is possible.

History (2) The luminance signal component and the chrominance signal component are each recorded on the "f's Bi, 7'71-1-rack". You can take it. Therefore, by performing predetermined signal processing, the FM audio signal which has been FM modulated is Φ folded into the FM modulated F lxl + Terumaro signal, and this m fold signal is recorded in the first rack where the luminance IR@ component is recorded. It is also possible to do so.

Alternatively, it is also possible to mix the FM-modulated FM audio (No. 8) with the M-modulated [M color signal] and record this car daytime signal 5 on a video track that records the color signal component.

In addition, in the first to fourth embodiments described above, 1
120 for tram 1 to record field worth of signals.
Because all you have to do is scan the tape with a rotating magnetic head, the conventional 1! For i1λ, in order to record one field's worth of signals, the drum is rotated 180 degrees and the magnetic l\rad tape is scanned. ((J-Bou is fine.

(Effects of the Invention) Since the present invention is as described in F (^1), it is possible to improve the image quality and to improve the usability of magnetic recording media. It has the advantage of being able to be realized with a simple 111 circuit (14 circuits) and no special 4T signal θ processing is required since it is capable of recording and reproducing from time to time.

[Brief explanation of drawings]

FIG. 1 is a diagram for explaining the recording and reproducing of the first embodiment of the YC-]nponen[~ recording and reproducing system according to the present invention, and the second
The figure is a diagram for schematically explaining the bidet 1-rack formed by the first embodiment of the YC component recording and reproducing method according to the present invention, and FIG. 3 is the YC component recording and reproducing method according to the present invention. A block diagram of the first embodiment of
Fig. 4 is a block system diagram of the second embodiment of the YC component 1 recording/reproducing method according to the present invention, and Fig. r'J5 is a block diagram of the third embodiment of the 1'C component recording/reproducing method according to the present invention. System Diagram FIG. 6 is a block system diagram of a fourth embodiment of the YC component 1-50 recording/reproducing system according to the present invention. DESCRIPTION OF SYMBOLS 1... Drum, 2.3.4... Magnetic head for video signal recording and reproduction, 5... Tape, 6... Video signal input terminal, 7...
Luminance signal/carrier color signal separation circuit, (3, 27, 20, 3
3,4G...Pre-emphasis circuit, 9, 12.28
．． 30.34.47...FM modulator, 10, 19...
・Head switch, 11.24...Frequency converter, 1
3, 14.15...Magnetic head for recording video signals, 1
6, 17.18...Magnetic head for video signal reproduction, 2
0, 23.3t'i, 40.43.49...FM demodulator, 21, 37.41.44.50...De'emphasis circuit, 22...Luminance signal,/carrier color signal mixture Circuit, 25... i-video (qI signal output terminal 2G... decoder, 31, 35.3J 42... BPF, 32...
...Adder, 38, 48...Encoder, 45...
Line sequential converter, 51... Vermicotheque, 52...
1H delay circuit. Patent applicant Victor Japan Co., Ltd. Figure 12

Claims (1)

[Claims] Helical scan video signal ';''i Il & l air distribution reproduction method is used in d5, and the magnetic head for recording video signals is 120
゜Attachment at equal angular intervals (two magnetic recording media are attached to the rotating body)
The luminance signal component is separated from the color television video signal and converted into a predetermined signal format by being attached and wound at a winding angle of 40 degrees, and the luminance signal component is separated from the color television video signal and converted into a predetermined signal format. (!!Signal components are defined as the period from when the magnetic head for recording video signals starts scanning the magnetic recording medium until it rotates 120 degrees, and when the magnetic head for recording video signals starts scanning the magnetic recording medium. The scanning amount IF; supplies the video signal to the magnetic head for recording the video signal by selectively switching between two scans 1!n, that is, from the time when the scan is rotated by 120 degrees to the end of the scan; The YC component 1-recording/reproducing system is configured so that different signal components are recorded in the first-to-first racks of one tree formed in two scanning periods.