JPS59175006A - Magnetic recorder - Google Patents

Abstract

PURPOSE:To control the characteristics of each recording system by reproducing the recorded signal on an oblique track with a single checking reproduction rotary magnetic head with can displace in the direction approximately orthogonal to the scanning direction of a record rotary magnetic head. CONSTITUTION:The output terminal of a rotary magnetic head HM for monitor reproduction is connected to the input terminal of a reproduction equalizer 6 via an amplifier AM. The output terminal of the equalizer 6 is connected to a fixed contact (a) of a changeover switch S22. While the output terminals of FM modulators MD-1-MD-5 corresponding to rotary heads HA-HE are connected to fixed contacts (a)-(e) of a changeover switch S21 respectively. A mobile contact (f) is connected to the input terminal of a mixing circuit 7 for the white reference signal. The level of the modulating signal of each channel obtained from an FM modulator 8 with switching of the switch S21 is compared with the level of a reference signal. Then the recording system of each channel is controlled to obtain the coincidence between said two levels. In such a way, the characteristic variance can be reduced between oblique tracks.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a magnetic recording device.

Background Art and its Problems When signals are recorded on a magnetic tape by using a plurality of rotating magnetic heads to form inclined tracks, if the signals of each inclined track are commonly reproduced by a single reproducing rotating magnetic head, If there are variations in the characteristics of each recording system for a plurality of rotating magnetic heads, there will also be variations in the characteristics of the reproduction signal from each inclined track.

Purpose of the Invention In view of the above points, the present invention provides a magnetic recording device which uses a plurality of rotating magnetic heads to record signals by forming inclined tracks on a magnetic tape. The purpose of this paper is to propose a method that reduces the variation in characteristics between each inclined trunk formed on a magnetic tape.

Summary of the Invention A magnetic recording device according to the present invention includes a plurality of recording rotary magnetic heads and a single read/write rotary magnetic head for inspection that can be displaced in a direction substantially perpendicular to the scanning direction. A system in which the signals recorded on each inclined track on a magnetic tape by a plurality of rotary recording magnetic heads are reproduced, and the characteristics of each recording system of the plurality of rotary recording magnetic heads are adjusted based on each reproduction output. It is.

According to the present invention, in a magnetic recording device that uses a plurality of rotating magnetic heads to record signals on a magnetic tape by forming inclined tracks, ζ It is possible to obtain a magnetic tape in which variations in characteristics between the respective inclined tracks formed on the magnetic tape are reduced.

EXAMPLE An example of a suitable high-speed phenomenon recording apparatus to which the present invention is applied will be described below with reference to FIG. An example of this high-speed phenomenon recording device is a case where an imaging device that scans at a scanning speed five times the scanning speed of a standard NTSC television signal is used.

The subcarrier frequency, horizontal frequency, vertical frequency, and frame frequency of this imaging signal are f′=, (+”H+
Assuming f'V + f\R, these are expressed as follows.

f'H-f'v -78,75 (KHz)f'v-
300 (H2) f'pR--f'v = 150 (Hz)
+11 is an imaging device, which includes an imaging tube, an imaging device such as a solid-state imaging device, a driving means for the imaging device, a signal processing circuit, etc.
It further includes an encoder for obtaining an NTSC composite color imaging signal.

However, such an encoder is a signal processing circuit system after the imaging device (11) (for example, the next stage after the D/A converter described later).
It can also be provided in □.

The composite color imaging signal from the imaging device +1+ is supplied to an A/D converter (2) and digitized. (8) is
This is a synchronization separation circuit that receives an imaging signal from the imaging device +11 and separates various synchronization signals. The Heller frame signal from the imaging device +11 and the horizontal and vertical synchronization signals from the synchronization separation circuit (3) are supplied to the clock signal generation/system control circuit (4). The frequency f'w-cy from this circuit (4) is, for example, 4 f't,c ("
71.6 (MH2)) clock signal is sent to the A/D converter (
2). Further, a control signal from the circuit (4) is supplied to a fixed magnetic head (6) via an amplifier (5) and recorded on the side edge of a magnetic tape (not shown).

The digitized image signal from the A/D converter (2) is sent to the field meter via the on/off switch 81 to SIO, respectively.
- January 51 (M-1 to M-10) and is written at a data rate of ζ and write frequency f w-aK. Field memory M-1, M-6; M-2M-71M
-3, M-81M-4, M-91M-5; Digitized image signals read out from M-10 at a data rate of readout frequency f n-tx (-+ f w-cK) are respectively Changeover switch (fixed contact a.

ζ,
D/A with a clock signal of read frequency rn-cg
converted. The analog imaging signals ν10-1 to VID-5 obtained from the D/A converters D1-D1-D5 are supplied to the FM modulators MO-1-MD-5 and subjected to FM conversion. The resulting FM modulated imaging signals are sent to amplifiers A1 to A5, respectively.
are supplied to five rotating magnetic heads (11^--HE), and are recorded on the magnetic tape so as to sequentially form adjacent inclined tracks.

In addition, the FM modulators MO-1 to HD-5 have video level,
It has means for adjusting the carrier frequency, deviation, DG, DP, frequency characteristics, etc., so that the characteristics of each channel can be made uniform.

Further, such a high-speed phenomenon recording device is composed of a television camera and a helical scan type VTR, but in this example, an imaging device (from 11 to D/A converter DA-1-DA) is used.
-5 to television camera side, FM modulator MD
-1 to MD-5 to rotating magnetic heads HA to HE,
Although the amplifier (5) and fixed magnetic head (6) are placed on the VTR side, the boundary is not limited thereto.

Next, the operation of the apparatus shown in FIG. 1 will be explained with reference to FIG. 2 as well. In FIG. 2, T1. T2, T3, . . . indicate field periods, each having a time width T. In the period T1, only the switch S1 is made, and the digitized image signal is written into the memory M-1. Next, the field period T
At step 2, only switch S2 is made, and the imaging signal is written into memory M-2. Thereafter, similarly, imaging signals are sequentially written into each of the memories M-3 to M-10.

Then, in the field period T6, the switch S1
'1 is made on the fixed contact a side, field period T1
The image pickup signal wIN stored in the memory M-1 begins to be output one after another. Since f R-(!K = + f w-c, the image pickup signal WIN is read out and the read signal RI is
To obtain N, a 5-field period T G −T t
Requires o.

Similarly, in the field period T7, the image pickup signal W2N written in the field period T2 begins to be output one after another in the memory M-2.Similarly, the image pickup signal W2N is read out and
In order to obtain the signal R2N, the 5 field period T7~
T11 is required. Thereafter, the process proceeds in the same manner, and in the field period 1゛11, the °ζ switch SSi method fixed contact is made to the side °C, and the image signal WQN of the memory M-6 is
, and a read signal RGN is obtained. However,
The written digital imaging signals w, N, w2N...
When controlled so that it is one field from the beginning of each field, the read image signals RAN, R2H...
will be output one after another from the beginning of each field, and D/Δ
Analog imaging signal VI from converters 0^-1 to 0^-5
Imaging signals are output to D-1 to VID-5.

Also, if we pay attention to the imaging signal VID-1, this is the imaging signal RxN-=RgN-"RsrN+x)- which is sequentially read out.
Consists of... Now, if wIN is the first field imaging signal of the NTSC system, R2H is the second field imaging signal,...R4H is the fourth field imaging signal, R
5H is the first field imaging signal, R6H is the second field imaging signal, and so on. Therefore, the imaging signal VI
D-1 is the sequential imaging signal RIN (first field) →
R55 (2nd field) -R1 (N+1) (3rd field) =RstN+x) (4th field) Ru
ru2) (first field)...The appearance is NTSC, continuous, with color framing.
This is the imaging signal of the system. Similarly, imaging signal VID-2...
・VID-5 is also a continuous NTSC imaging signal.

In the end 1. A five-phase NTSC imaging signal is output from each D/A converter.

FIG. 3 shows the arrangement of the rotating magnetic heads (recording heads) HA to HE. That is, a 51vA rotating magnetic head H^~H
g is arranged at 72° intervals from the rotating drum RD of the tape guide drum GD, and is a fixed drum in the clockwise direction. The tape to be recorded is wound counterclockwise along the outer periphery of the drum GD from point P2 to point P1,
The wrapping angle is approximately 344°. Further, the tape running speed is five times the standard value v (for constant running).

Does the tape recorded under the above conditions need to satisfy all the dimensions specified in the standards? That is, the fourth
In the figure, the recording track pattern vector detail 1 on the tape is the tape running vector QP2 as shown in the following figure.
is the vector sum of the drum rotation vector or P2Pz.

QPICO8θc −P2Pt cos /? H=5
vt Here, θC9θH are the track angle and the helix angle, respectively.

From these two equations, P2P1 and θH are determined. h.

vl, OPt are, for example, h = 18.4. vt
= 4.07° (IP engineering = 410.764.

P2P1. θH is 390.4357. g,,701
17° (=2°42'04'). Therefore P
It is sufficient if 2P1 becomes the inclination angle of the drum DG.

Next, in order to form an inclined track on the tape so that the relative speed between the rotary head and the tape matches when the tape is played back with an SMPTi type C VTR, the outer diameter of the tape guide drum is adjusted to It is necessary to make it a predetermined minimum value compared to that of a VTR. This will be explained above with reference to FIG.

In Fig. 5, the relative velocity between the rotating magnetic head and the tape is determined by the following equation, when the tape running speed is 5 (VL is SM
PT[! It is the vector sum of the standard velocity of a type C VTR tape during lightning running) and the linear velocity segment of the rotating magnetic helix.

→ → → v = vh +5v (Also, when the track length of the inclined track formed on the ζ magnetic tape by the rotating magnetic head during still playback of the SMPTB Taifubu C VTR) is lc, then
This is expressed as the following equation.

Jc-πl)CH(Φc/360) Here, Dc is the outer diameter of the tape guide drum of the SMPT, type C VTR, and ΦC is the angle of the tape winding (=34
0°).

Further, when the tape is running at five times the standard speed, the track length l is expressed as follows.

β−πD·(Φc/360) Here, D is the outer diameter of the tape guide drum of the VTR according to the present invention.

Thus, 'C2+L2 can be expressed as shown in the following equations.

11c2=h2+(Lcosllc-vl)2i
t' = h' + (L cosθc1-5vt)' Here, h is the length of the track in the width direction on the tape, and L is the length when the tape runs at five times the standard speed. SMPTI! This is the track length on the tape of a Type C VTR.

Thus, D c /D is expressed as follows.

Dc/D = (h2+ (L cosθc-vt)2
)+×(h2+ (L cosθc 3v())−+
- Thus, the outer diameter D (<Dc) of the tape guide drum is selected.

The tape pattern recorded on the tape by the tape guide drum, rotating magnetic head, tape running system, etc. determined as described above satisfies the SMPTE Type C VTR standard.

FIG. 6 shows a tape pattern conforming to the standard of the TIE type C VTR and the arrangement of the rotary magnetic heads H to HE and the corresponding inclined trunks. In Figure 5, ζ,
TP indicates a magnetic tape, and TA to TE indicate inclined trunks corresponding to rotating magnetic tapes H to HE, respectively. In addition, T
CTL indicates control signal track.

SMPTI! If normal playback is performed on a VTR that meets the Type C standard, the one-mouth, one-speed phenomenon can be played back in slow motion.

Next, with reference to FIG. 7, another example of a four-speed phenomenon recording device suitable for applying the present invention will be described. Switch 81 to S+o+ in Figure 1 Memo! J (51, Sui Nochi Sit
~Ss5 and the D/A converter D^1-D^-5 are collectively considered as one memory (5'), then the following modifications can be considered as this memory (5'). If a serial memory such as a CCD or a shift register is used, the memory (5') can be composed of six field memories, a switch, a D/A converter, etc.

The operation of the memory (5') in this case will be explained with reference to FIG. It is assumed that the memory (5') has the above-mentioned six field memories M-1 to M'-6.

Now, in the field period T1, the digitized imaging signal is written and memorized. Next, during the field period T2, the imaging signal ζ is written into the memory M-2. Thereafter, similarly, imaging signals are sequentially written into each memory F-3 to M-6. Then, in the field period T2, the image pickup signal W written in the memory M-1 during the field period T1 begins to be read out.fR-CK=+
f 'v-cy, so the photo) elephant (pi issue WINf
In order to obtain the readout signal RIN, five field periods T2 to T6 are required.

Similarly, in the field period T3, the image pickup signals W2~ written in the memory M-2 during the field period 1'2 begin to be read out. Similarly, in order to obtain the readout signal R2N by sequentially outputting the imaging signals w and N, 5 filters are required for the F period 73 to T7.
Is required. Thereafter, ζ progresses in the same manner, and in field period 1-7, the ζ switch So is made to the fixed contact side, starts reading the image signal W6N of the memory M-6, and obtains the read signal RGN. However, °ζ When the stored digital image signals W, N, W, N, etc. are controlled so that they correspond to one field from four in each field, the read image signals RIN + R2N... , songs from each field will be released one after another, D, 4A converter D^
-1~I) Analog imaging signal VID-1~ from A-5
An imaging signal is output to VID-5.

Also, focusing on the image pickup signal VID-1, this is the image pickup signal RIN-R6N-"R1(N+1)-.
・Consists of. Now, if WIN is the first field imaging signal of the NTSC system, W2N is the second field imaging signal, ... W4N is the fourth field imaging signal, W5
N is the first field imaging signal, W6N is the second field imaging signal, and so on. Therefore, the imaging signal VID
-1 is the sequential imaging signal RtN (first field) → R
IIN (2nd field) → R1 (NOl) (3rd field) - R6 (N,) (4th field) R1 (N
It consists of ( ) (first field)..., and the appearance is above,
It becomes a continuous NTSC imaging signal with color framing. Similarly, the imaging signal VID-2...V
ID-5 is also a continuous NTSC imaging signal. in the end,
A 5-phase NTSC imaging signal is output from each D/A converter.
It will be output.

In the memory (5') of FIG. 5, when using RAM, writing and reading can be performed in a time-sharing manner.
Only five field memories are required.

In addition, in FIG. 1, the synchronization signal is separated from the composite imaging signal from the imaging device +11 and supplied to the ζ clock signal generation/system control circuit (4), but as shown in FIG. A synchronizing signal may be generated from the signal generation/system control circuit (4) itself and supplied to the imaging device (11).

Now, the recorded tape obtained by the above high-speed phenomenon recording device is converted to SMPTE Type C VTI'? Since the rotating magnetic head and reproducing circuit of this VTR are one channel, the fψ diagonal trunks formed on the magnetic tape by the rotating magnetic head H to I) E of the 51 fixed are There is a need to record the same characteristics.

(For each rotating magnetic head H ~ HF recorded on the magnetic tape, each tilted trunk recorded in 'ζ' is redisciplined 'ζζ tick, and accordingly 'ζ rotating magnetic head H to 7 do II^
~A device is required to adjust and equalize the characteristics of each recording system for HF.

Below, a detection/adjustment device as an embodiment of a magnetic recording device according to the present invention will be described with reference to FIGS. 9 and 10. First, as shown in FIG. 9, on the rotating drum RD of the tape guide drum CD, in addition to the rotating magnetic heads 11^ to 11E shown in FIG. Provide l.

In FIG. 9, for example, a rotary magnet HM is provided approximately in the middle of the rotary magnetic field 7 F-Hc + Ho. In addition, head Hc, H? The angle θD between I is approximately 36°. Furthermore, MN
indicates a level difference between head "HM" and heads 11^ to HF.

As shown in FIG. 10, the output end of the rotating magnetic head HM for monitor reproduction is connected to the input end of the reproduction equalizer (6) via the amplifier AM, and the output end is connected to the fixed contact a of the changeover switch 322. Connect to.

On the other hand, each output terminal of the FM modulators MD-1 to MD-5 for each rotating magnetic head H^ to HE is connected to each fixed contact a''-e of the changeover switch S21, and the movable contact [is connected to the white reference signal. The output end of this mixing circuit (7) is connected to the selector switch S.
22 movable contacts C are connected to the input end of the FM demodulator (8).

Next, the operation of such a detection/adjustment device will be explained.

First, the movable contact C of the selector switch S22 is switched to the fixed contact a side, a standard tape recorded on an SMPTE type C VTR is run at five times the standard speed, and the rotating magnetic spatula FHM plays it back. Then, the repopulated yarn is subjected to dIM adjustment so that its properties satisfy the specifications. After that,
A test signal (for example, a white signal) is supplied to each FM modulator MD-1 to MD-5. Then, the movable contact C of the changeover switch S22 is switched to the fixed contact side. In the mixing circuit (7), each of the FM modulators M, D-1 to MD-5 receives
A reference signal having a white signal frequency is inserted into the vertical synchronization signal section of the test signal. Then, by switching the changeover switch 521, the level of the feedback signal of each channel obtained from the F M tl IIJ device (8) is compared with the level of the reference signal (, and the level of the signal of each channel is adjusted so that they are the same. Adjust the gain of the recording system to jIM.

Thereafter, the J moving contact C of the changeover switch S'22 is switched to the fixed contact A side. And each FM modulator MD-1=
A test pattern signal is supplied to the MD-5, and each variable mesh test pattern signal is sent to the rotating magnetic head HA-HE.
The data are sequentially recorded on a magnetic tape so as to form an inclined trunk. At this time, the rotating magnetic head HM for monitor reproduction (which can be displaced in a direction substantially perpendicular to the scanning direction) is displaced to scan and reproduce the inclined trunk of each magnetic head H^~HE. The video level, clamp level, and Brienffpsis frequency 'tH1, DC of the test pattern signal which is each demodulated output from the demodulator (8).

Various characteristics of the recording system of each channel are adjusted so that the DP, waveform characteristics, etc. match the test pattern signal obtained by reproducing the standard tape. In this way, each rotating magnetic head H^~H
The characteristics of each H recording system will be the same.

Next, referring to FIG. 11, a displacement drive circuit for the rotary magnetic head HM for monitor reproduction will be described. The rotary magnetic head HM for monitor reproduction is attached to the rotary drum RD of the tape guide drum GD in FIG. 9 via a bimorph film as an electro-mechanical conversion element. A strain gauge (11), which is a mechanical-electric conversion element, is attached to this bimorph 0 to detect its displacement.

In the Guinami Soku tracking servo circuit (24)
C, the displacement detection output from the strain gauge (11) is S
The signal is supplied to a well-known dynamic tracking control circuit (13) used in MPTE, Eve-C VTRs, and the like. The control signal from this control circuit (13) is
On-off switch 332 - combiner (adder) (14
) - is supplied to the bimorph Ql as a displacement drive signal via a dynamic tracking drive circuit (15).

Furthermore, the displacement detection signal from the amplifier (12) is passed through the low-pass filter (16) - amplifier (17) - on/off switch S.
is supplied to the Hall 1 capacitor (18) via at. The terminal voltage of the capacitor (18) is supplied to a combiner (subtractor) (20) via an amplifier (19) and subtracted from the output of the amplifier (17). It is supplied to a combiner (subtractor) (21) and subtracted from the DC voltage EO from the movable contact f of the changeover switch 336 of the DC voltage generation means (25).
) is supplied to the combiner (14) via the amplifier (22)-on-off switch 333 and added to the output from the dynamic trunking control circuit (13). A DC voltage Ea (>0) is applied to fixed contacts a''-e of the selector switch S]6, respectively.

Hb(>0), l1ic(=0), fld(<O),'
T! e(<03 is given.

(23) is a cancellation signal generation circuit that generates a damped vibration cancellation signal that converges to Ov, and supplies it to the synthesizer (14) via an on/off switch 334.

Next, the operation of the circuit shown in FIG. 11 will be explained with reference to FIG. 12 as well. Figure 12 shows a certain moment during recording, for example, the moment when the head Hc has finished scanning one track.
There is. T^-Ti indicate scanning tracks of heads H^-H, respectively. M is the neutral position of the reproducing movable head f (when the bimorph image of M is not biased. Direct #IAMN indicates the movement line of the movable head HM. M is the movable head H
The head H^ of M is on the scanned track T^, and when the movable head HM moves 2 to 7 inches in the positive direction along the movement line MN, it is on the track To, and when it moves 1 pinch, it is on the trunk Tc, and the movable head HM is on the trunk Tc when it moves one pinch. If you move it by one pinch in the direction, it will move onto the trunk Tc, and if you move it slightly, you will move it onto the trunk Tc, and each track can be played back.

Actually, on the track where M is located, N is the track TD
The position of the movable head HM is determined so that it is located between and Tc. Here N is track T.

and Tc, MN becomes 2.5 track pinch. MN is generally as follows: MN=2 p +CN tan (θH−〇〇). In addition, p is the track pitch, C is the position of the spatula F"'Hc, θH is the helix angle, and θC is the track angle. In the above equation, p = 0.9.CN tan (θH - θ
c)=2.5, MN becomes 0.45.

In FIG. 11, initially, during the recording mode, the switch 332 is turned off once to open the dynamic tracking loop, and then the switch S'34 is turned on to give an erase signal to the bimorph α0 of the ζ head HM. The position of the bimorph (QO) is returned to the neutral position. At this time, the head HM should be scanning over the trunk Tc. In this state, close the dynamic tracking loop once. At this time, the head HM completely tracks and scans the track TA. At this time, by turning off the switch 333 and making the switch S31, a low-pass filter is applied to the capacitor (18), and a filter (1
6) The output of 0 is held. After turning off the switch S31 and making the switch S33, the switch 33 is turned off.
When the movable contact f of 6 is connected to the fixed contact a, a voltage Ea corresponding to 2 pitches of the strain gauge (11) output is generated.
is amplified by the amplifier (22) and supplied to the circuit (15), so that the output of the strain gauge (11) is made approximately equal to the voltage Ea. In this way, head H
M is moved two pitches to scan that track.

Thereafter, the movable contact f of the switch 53B becomes the fixed contact b...
- By switching to e, the head HM scans each trunk T^ to TE.

Still another example of a suitable high-speed phenomenon recording device to which the present invention is applied will be described below with reference to FIG. 13, but parts corresponding to those in FIG. Omitted.

This embodiment is a case where an imaging device that scans at a scanning speed three times the scanning speed of a standard NTSC television signal is used.

The subcarrier frequency, horizontal frequency, vertical frequency, and frame frequency of this imaging signal are each fzc.

Assuming f74, 1%, and fμR, these are expressed as follows.

f71r = 180 (H2) f iR = f 'v ""90 (Hz) A/
The digitized imaging signal from the D converter (2) is sent to the field memo via on/off switches 81 to SG, respectively.
(M-1-M-6) with penetration frequency 1-O
It is written with a data rate of K. Read frequency fR-CM (='r f w-aK) from field memories M-1, M-4: M-2+M-51 M-3, M-6
The digitized image signals read out at a data rate of DA-3, the read frequency r
D/A conversion is performed using the tt-ax clock signal.

The analog imaging signals VID-1 to VID-3 obtained from the D/A converters DA-1 to 0A-3 are sent to the FM modulator MD-1.
~ MD-3 and are subjected to ζ FM modulation, and the obtained FM modulated imaging signals VID-1 to VID-3 are respectively supplied to ζ and 12o via amplifiers A i to A 3 .

It is supplied to three rotating magnetic heads H^~He at intervals,
The information is recorded on the magnetic tape so as to form sequentially adjacent inclined tracks.

Next, the operation of the apparatus shown in FIG. 13 will be explained. In FIG. 14, Tz, T2, T3, . . . are fields. Now, in a period Ti, only the switch s1 is made, and the digitized imaging signal is written into the memory M-1. Next, in the field period -T2, only the switch S2 is made, and the imaging signal is written into the memory M-2. Thereafter, similarly, imaging signals are sequentially written into each of the memories M-3 to M-6.

Then, in the field period T4, the switch S l
'l is made on the fixed contact a side, field period T1
The image pickup signal WIN written in the memory M-1 begins to be output one after another. Since fR-C = + f w-ay,
In order to read out the image pickup signal wIN and obtain its readout signal RIN, three field periods T4 to 1'ε are required.

Similarly, during the field period T5, the imaging signal W2N written in the memory M-2 during the field period T2 begins to be output one after another. Similarly, three field periods T5 to T7 are required to sequentially output the imaging signal w2N and obtain the readout signal R2N. Thereafter, proceed in the same manner, field period T
At step 1'l, the switch S1'l is set to the fixed contact side, and starts outputting the image pickup signal W4N of the memory M-4, thereby obtaining the outputting signal R4N. However, when the written digital imaging signals wIN, w2N, . . . are controlled so as to cover one field from the beginning of each field, the successively outputted imaging signals R' IN + R2N, . . .・
will be issued one after another from the opening of each field, and the D/A
Analog imaging signal VI from converters D^1 to D^-3
D-] to VID-3, imaging signals are output.

Also, if we pay attention to the image pickup signal VID-1, this is the image pickup signal RlN-4R4N→R1(Nya)-・
・Consists of. Now, if wIN is the first field imaging signal of the NTSC system, W2N is the second field imaging signal, ... W4N is the fourth field imaging signal, ws
N is the first field imaging signal, WsN is the second field imaging signal, etc. Therefore, the imaging signal VID
-1 is the imaging signal RtN (first field) → R4N(
4th field) =R1cN*x> (3rd field) → R4(N◆1] (2nd field) → R1(N+
2) (First field) ...and the color framing collapses. Therefore, °C2 imaging signal R4N (4th field) + R4tN+x) (2nd field)・
If the phase of the carrier color signal is omitted, an NTSC imaging signal that is apparently continuous, that is, has good color framing, can be obtained. The same applies to "ζ" for the imaging signals VID-2 to vxn-a. Therefore, in this case, the color encoder for obtaining the composite color imaging signal of the NTSC system in the imaging device (11) is supplied with the carrier color signal. By providing means for inverting the phase, the imaging signals VID-1 to V
It is possible to create a signal with apparent color framing as ID-3.

However, ′ζ, from the imaging device, the standard value N of the NTSC system
Obtain a color imaging signal with a double scanning speed, write it to a memory with a storage capacity of N fields or more, and from that memory obtain N channels of color imaging signals with a standard scanning speed°ζ, each with N rotations. In a high-speed phenomenon recording device that supplies color imaging signals of N channels to a magnetic head and records them on a magnetic tape so as to sequentially form adjacent inclined tracks, "ζ" means that N is 4n+1 or 4n. -1 (however, n = 1.2, 3...), the configuration of the color encoder changes accordingly. In other words, when N = 4n+1, the color encoder is an overcrowded NTSC encoder. is fine, but N-4n
In the case of -1, it is necessary to make changes to the NTSC color encoder so that a color imaging signal with correct color framing can be obtained from the memory.

In addition, in the high-speed phenomenon recording device according to the present invention, the color encoder is the same when handling SFICAM color imaging signals as it is when handling NTSC color imaging signals.

Furthermore, when handling PAL color imaging signals, N=
8n+ I CN-4n+ 1 and n is an even number) (
n = 1.2.3...), the color encoder may be a crowded PAL encoder, and N = 8n
-3 (if N=4n+1 and my number is odd) When (n=1゜2.3...), change to a PAL color encoder so that a color imaging signal with good color framing can be obtained from the memory. need to be added.

Therefore, when N is an odd number of 3 or more, the configuration of the color encoder becomes simple. However, if this point is not taken into account, N may be an even number.

According to the above-described high-speed phenomenon recording device, high-speed phenomena can be easily imaged and recorded using a television camera and a VTR. Tapes recorded on such high speed recording devices can be played back on standard VTRs, thus providing compatible recorded tapes.

In the case of N=4n±1 (n=1.2, 3, . . . ), the configuration of the color encoder becomes simple in each television system.

According to the magnetic recording device described above, in a magnetic recording device that uses a plurality of rotating magnetic heads to record signals by forming inclined tracks on a magnetic tape, magnetic recording is performed by P number of rotating magnetic heads. It is possible to obtain a tape with small variations in characteristics between the inclined tracks formed on the tape.

Effects of the Invention According to the present invention described above, in a magnetic recording device that uses a plurality of rotating magnetic heads to record signals on a magnetic tape by forming inclined tracks, It is possible to obtain a tape with small variations in characteristics between the inclined tracks formed on the tape.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of a suitable high-speed phenomenon recording device to which the present invention is applied; FIG. 2 is a diagram showing the timing of memory writing and continuous output to explain the device of FIG. 1; 3A and 3B are a line plan view and a side view showing the tape guide drum of the device shown in FIG. 1, respectively, and FIGS. 6 is a pattern diagram showing a recording pattern of a tape for explaining the apparatus of FIG. 1; FIG. 7 is a block diagram showing the main parts of another example of a suitable high-speed phenomenon recording apparatus to which the present invention is applied; 8th
The figure is a diagram showing the timing of memory writing and successive output to explain the device of FIG. 7, and FIGS. 9A and B show a rotary magnetic head for monitor reproduction in an embodiment of the all-in-one recording device according to the present invention. Linear plan view and side view of the tape guide drum of the apparatus of FIG. 1 or FIG. 7 when provided with
J is a first embodiment of the magnetic recording device according to the present invention.
FIG. 11 is a block diagram showing an example of the inspection H1/adjustment device of the device shown in FIGS. 9 and 10, and FIG. , FIGS. 12-11 are diagrams showing the positional relationship between the tracks on the tape and the rotary magnetic head for explaining the operation of the displacement drive circuit, and FIG. 13 is a diagram showing a high-speed phenomenon recording device suitable for applying the present invention. FIG. 14 is a block diagram showing still another example of the device shown in FIG. 13, and is a diagram showing the timing of memory writing and continuous output to explain the device shown in FIG. 11^~HE is a recording rotary magnetic head; FSHH is a reproducing rotary magnetic head for inspection.

Claims (1)

[Claims] It has a plurality of recording rotary magnetic heads and a single inspection reproduction rotary magnetic head that can be displaced in a direction substantially perpendicular to the scanning direction, and the inspection reproduction rotary magnetic head is provided with a plurality of recording rotary magnetic heads. Magnetic recording characterized in that the signals recorded on each inclined track on a magnetic tape are reproduced, and the characteristics of each recording system of the plurality of recording rotary magnetic heads are indirectly determined based on each reproduction output l. Device.