JPS60673A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To attain the monitoring and checking of recorded information with a simple constitution by providing closely the 1st and 2nd heads, reproducing a signal recorded by the 1st head by the 2nd head, and recording a comparison output signal between this reproducing signal and the original signal to be recorded, by the 1st head. CONSTITUTION:When a head 43 records a signal on a track 50, head 44 reproduces the signal while following the head 43. Then a reproducing signal is amplified by a reproducing circuit 61 and fed to a comparator circuit 62. A comparison circuit 62 compares a recording signal by the head 43 reproduced by the head 44 and the original data from an original data recording circuit 63 and if a difference exists between the both, the head 43 records a signal representing an error signal of the track 50 into an area 50a by the indication of a comparison circuit 62 and records the signal on the track 51 again. Moreover, the same data is recorded on one track and also the adjacent track independently of the repetitive recording by the said monitoring at the record for error correction at reproduction.

Description

[Detailed description of the invention]

Industrial applications The present invention

[The recorded signal is accurate to the source, and the magnetic recording of information is highly accurate.
? 7 L, - It is something that concerns J. Conventional example 114 or L problem 5eit As a data recorder, it is used as a data recorder.
:1. Ch Kare 1 ~ Shiki Aap'shi] - Evening - About (
' j, n i Iλ12 (Explain "C using Figure 13. Figure 1 O, J: and Figure 2 (Ni 13, 1 is cullet, 2 is supply reel, 33 (Yζ taking reel, 4L 1ν seat, 5 is the magnetic j-b, 6 and 7 are to the guide boss 1, 8 is the magnetic head, 9 is the pin-bra, 9a is the capstan, 10 is the cassette j (7-pre-computer) -1
11, 14 are ]-do, 121.1. Part 1 is a computer, 13 is a display (A unit, 1" L knob complete set) - Goo 10 is =) - 111, - Yotsu (personal computer connected to a picoter 12, A9, this The personal computer 12 and the noise signal f1 and r13 are connected by a cord 14.
Inside the two pieces 1 to 1, there are a supply reel 2 and a take-up reel 3.
There are guide posts 6, 7, magnetic j-1 receptacle 1, supply reel 2 to mountain (, guide post 6 through 1' Ml
The air contacts the air head 8, then passes between the pinch roller 9 and the air cylinder 9a to the air-C guide post 7, and is wound onto the take-up reel 3. FIG. 3 is a diagram 1113 of the pattern of the data tape recorded by the Karen 1 tape recorder 10. 1G indicates the start of the header, where the J data is recorded, 17 is the part where the file name is recorded, 1
Reference numeral 8 indicates a portion where data such as programs are recorded, and reference numeral 19 indicates a portion where -7-night is recorded in r and d to indicate the end. 2. In the conventional 471.5, during recording - current type data recorder 10 or magnetic tape 5
If a problem occurs (for example, dust on the magnetic head 8 or on the magnetic tape 5), the problem cannot be detected during recording and the necessary data cannot be recorded. The conventional method is to rewind and play the disc and check for errors.This is time consuming and troublesome, and is very inconvenient.Objective of the InventionThe present invention overcomes the above-mentioned drawbacks of the conventional technology. / ii'iηAlthough it has a simple configuration, it is possible to record information without error 1.
), check the monkey 1, il note t7. endogeneity, device r'l 4. 'lΣ? The purpose is to provide 114 Achievements of the Invention In order to achieve the above object, the present invention provides a II 311 bell playback device, which provides til! during recording and playback. A head drum in which the air is wound at a predetermined angle, a first head on which the air is wound at a predetermined angle, and a first head on which the air is wound at a predetermined angle. In the first position near the stomach, and at the same position in the U-turn direction of the rad drum, take it to the same turn. A comparator circuit that compares the reproduced signal with the original signal recorded,
Record + r'it There are only a few configurations in which recording is carried out on the head. DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 4 is a schematic plan view of the magnetic recording and reproducing apparatus, in which 21 is a chassis, 122 is a cassette, 1-123 is a 1-hole feed reel, 2
4 is a take-up reel, 25 is a magnetic 7-brake, 26 to 28; J,
Guide boss 129; ancicon ball, 30 erase head, 31 impedance 1]-ra, 32,
33 to the guide boss 1, 34 to the rotation l\rad drum, arrow + I B + Yu rotation to the rotation of the raddora 1134,
35.3 (i is guide boss), 38 is impedance 0-ra, 39 is A/C head, 40 is guide boss.4
1 is a pinch roller, and 42 is a 17-button. The Il & Air 25 & J wound around the supply reel 23 go out of the cullet 22 through the guide posts 27 and 28, and pass through the non-Johnion ball 29, the erase head 30, the impedance roller 31, and the guide posts 32 and 33. Rotating head drum 34, guide boss h 3!
i, 3G, impedance roller 38, △/C head 3
9, guide boss 40, killebustan 42 and bimb 1
] - Pass through La 41 and enter Karetsu 1 to 22, jjI:
The take-up reel 24 passes through the guide post 20 in the tube 1-22.
It is wound up. -J: 3rd chain point C is guide post 32.3
3 is power 1 nia t-Dil ITJ Department Nih Lu n! 7
Q) (i'/jFj/I'') This is the locus leading to the predetermined winding A'' neck, and the locus of the guide post 35.3G is the chain point 11b131. FIG. 5 shows how to attach the magnetic head to the rotating head drum 34.
J state description lλ1, 434J, first head, 44
+,,l is the second head. XJ! Figure 6 is recorded on the magnetic Arp 25! , : Explanatory diagram of the Theno pattern, ll! of the magnetic surface of the tape! lIh day) I'm going to have a baby. Arrow [: 1 direction of the μ magnetic tape 25, mark 1 indicates the magnetic head 43 of the rotating head drum 34,
44q) Shows the direction of 314 lines. , 50-53 is 1
-L+1 on the rack! j+? Indicates a part of the recorded signal pattern that has failed. 1oi
1-5. in is 1 ~ easy h O・-! +,
This is the part where the '30J landmark is recorded. FIG. 7 shows the first and second heads 43. Gate at /14? +,
In the circuit block diagram U7 showing part of the circuit system, the second
Ll) The head 44 is connected to the irJ cow circuit 61 and
The first raw signal is sent to the comparator circuit G2 and compared with the original data from the circuit 63. The attached recording circuit 64 is for recording the signal from the comparison circuit 62 or the original data from the original data record 1n-1 path 03, and the contact G20 that the signal switching λt or switch 65 contacts .Select G3aJ
This is done by FIG. 8 is a circuit block diagram of the main parts of the circuit system connected to the first head 43 during reproduction, in which 70 is a reproduction circuit, 71 is a delay circuit, and 72 is a comparison circuit. 73 is a switch that is switched in synchronization with the rotation of the rotary head drum 34;
i'j F'3 fJ: Passes from the first head 43 through the reproducing circuit 70, and at a certain time (1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1) from the first head 43, passes through the reproducing circuit 70, and is transferred to the delay circuit 71 (when it returns to the delay circuit 71, the comparator circuit 7
Enter 2. 14 is a switch operated by the output from the comparator circuit 72. This switch 74 allows the signal received from the reproducing circuit 70, 3, or rather the signal coming from the delay circuit 71, to be output from the reproducing circuit 70.
flu Hiiragi output - (can be selected. Next, the operation will be explained. As shown in Fig. 4, the cassette l-22j
; Pull out the magnetic tape 25 and wind it around the rotary head drum 34 (=l Gj) and record/reproduce the signal for 11 seconds. First, when recording, for example, when drawing the I-rack 50, the first
+ft from the bottom right of FIG. 6 by the head 43 of ! f
I'm getting T-ed. At this time, the second head 44 is very close to the first head 43, and the second head 44 is very close to the first head 43.
1] Race from 1 to 1 as if it were
:l+, =yo-) is played back. - Then, the regeneration signal "I3" is sent to the regeneration circuit 61.
It is amplified and sent to comparison circuit 62. The comparator circuit 62 constantly compares the recorded signal of the file reproduced by the second head 44 to the head 43 with the original data from the original data recording path 63. First head 4301 ~ The race progresses further, J landmark area! + Poem entered in Oa, second head 44b first head 43 is in non-contact state with magnetic tape 25 1. End mark area 50 before two minutes
Enter a. The first head 43 and the second head 44 are
If there is a clear difference between the poem in the area of the I throat mark 50a and the orisinol data as a result of the comparison of 2C in the above comparison circuit, the first head No. 43 receives an instruction from the comparison circuit 62. As a result, a certain signal is recorded in the end mark area 50a, indicating that the signal of the tonk 50 is defective. In this way, if the recording of tracks 1 to 50 was not successful due to, for example, dirt on the magnetic tape 25 or unevenness of the magnetic 1Q body on the magnetic arc 25 (1), the J , if it is found, rewrite the nail ζ on the 1-rack 51 again. In addition, in order to correct the error at the time of turning 1 to 1, in addition to recording the same data repeatedly on the monitor during recording, record the same data on the next 1 to 1.
-Rack 6=i+! do. That is, for example, in FIG. Next, during self-starting, the first head 43 first repeats the signal 'T''J of track IIθ by 1''J. At that time, if the signals of 1 to 50 are defective -Cd in the end mark area 50a. If the signal -C is recorded, the signal of this i rack 50 will not be output from the reproducing circuit 70, and the (5 bow) of this track 5)0 will be skipped and the next 1~
Go to Latsk. Fortunately, if there is no signal recorded in the end mark area 50a of the 1-rack 50, this track! It) The signal is routed from the reproduction path 70 to 'ij
, extension circuit 711Cj 15. When J, Suin'f
73 is a contact 71a1. :Shinotozuru is in contact. ;C
Then, the first head 431;1. The signal of the clock 51 on i' is reproduced. At this time, switch 13 is IJJ and contact 72a is closed ffJ! I will.・It was confirmed that there was no defective DCJllI number in the 1st mark area 51a of the 1st rack 51. Afterwards, it is sent to the comparison circuit 72. 7/ to comparison circuit 72!
-('l, Compare the reproduction signal of the I rack 50 sent from the U extension circuit 71 with the reproduction (1 of the knock 51) by (<r phase meets l!, ili 'l ( i” is the level of the carrier wave included in the bow) 1st) I!4
Activate the switch 74. Advantageously, during reproduction, the signals from 1 to 1 of the two trees are compared, and h, which has a high output level of the carrier wave, is always selected to correct the error at '1' in C1. In this way, the first head 43 (-iit! record 1)
(Monitor the data on the second head 44, and if there is an error, it will not indicate that there is an error on that track, record the signal on IID, and record the data on the next 1-rack again. Therefore, even if an error occurs in record 11, -, it can be ignored when 1r] is generated, and 1
11) It is possible to use a highly reliable digital recorder (1!NOζ).Also, even in a so-called household VTR, this lid configuration can be easily achieved with a few changes. jIIfil: It can be repeated loudly and is highly practical. More than the effects of the invention - I will explain the present invention J: If it is simple (7
Even though it is a +1 configuration, it is possible to monitor and check the recorded information, greatly improving the reliability of the information.

[Brief explanation of drawings]

Figure 1 is a bottom view of a conventional magnetic recording/reproducing device 6, Figure 2 is an overall configuration diagram of an information system using a conventional magnetic recording/reproducing device, and Figure 3 is a diagram of a conventional magnetic recording device 11. An explanatory diagram of a one-stroke-jump pattern recorded by raw equipment, FIG. 4 is a schematic plan view of a magnetic recording and reproducing apparatus according to an embodiment of the present invention, and FIG. 5 is a diagram showing head attachment to a rotating head drum. Explanatory diagram of the state, 6th Mt, 1. Recording on IQ tape] A
-Matt's ;; 9 clear diagram, 7th t' There is a circuit block diagram of the main part of the pj generator system circuit. 25...Magnetic deso, 34...Rotating head donl\
, 43...first head, 44...second head,
(32...11. Comparison circuit agent Yoshihiro Moriki Figure 5 Figure 5 It) j/ 52 /J Figure 7

Claims (1)

[Claims] 1. Recording/reproducing n; Magnetic 7-b is wound at a predetermined angle G on lr.
a rotary head drum that is mounted on the rotary head drum; a first head that is mounted on the rotary head drum; The second part taken and attached to the head drum
head and this second head was played back (i
Compares the signal 'i' with the original signal to be recorded, comprises a comparison circuit, and reproduces the low temperature recorded by the first head at the time of recording by the second head of the item 11a, A magnetic recording/reproducing device configured to record the output signal of the comparison circuit '111 with the first head at a predetermined timing.