JPS61172244A - Rotary magnetic head type reproducing device - Google Patents

Abstract

PURPOSE:To reproduce securely a subordinate information signal which is recorded at a specific position on a track by controlling the traveling of a recording medium on the basis of a tracking signal reproduced at timing relevant to the recording position of the subordinate information signal. CONSTITUTION:Reproducing signals of heads 3 and 4 are extracted by a gate circuit 28 during reproduction with window pulses. Those reproducing signals are supplied to an LPF35 through the A-side terminal of a switch 34 and also supplied to a PCM audio circuit 30. The circuit 30 performs error correction, time-base expansion, and signal conversion such as D-A conversion reversely as compared with recording and a reproduced analog audio signal is outputted from a terminal 36. The LPF35 separates a pilot signal TPS for tracking generated by a pilot generating circuit 32 and the signal components is supplied to an ATF circuit 37. A tracking error signal is supplied to a capstan motor control circuit 20 to control the traveling of a tape 1 during reproduction through capstans 14 and 15, thereby performing tracking control.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a rotary head type reproducing device, and more particularly, to a rotary head type reproducing device that reproduces a main information signal from a recording medium in which a large number of tracks are formed in parallel, each of which has a sub information signal recorded only at a predetermined position. The present invention relates to a device for playing.

<Description of the Prior Art> In this specification, an example of this type of device will be described, taking as an example an audio tape recorder which compresses the time axis of an audio signal as a main information signal and records the compressed signal with digital modulation using a rotary head.

FIG. 1 is a diagram showing an example of a tape running system of a conventional audio tape recorder of this type. In FIG. 1, 1 is a magnetic tape, and 2 is a rotating cylinder that holds a rotating head 3.4. As a result, the heads 3 and 4 trace the tape 1 diagonally and record audio signals. Then, each time the head 3.4 rotates 36 degrees, a time axis compressed audio signal is recorded in each of the six regions formed in the longitudinal direction of the tape 1, so that a total of six channels of audio signals can be recorded. You can get a dedicated tape recorder.

This tape recorder will be briefly explained below. FIG. 1 is a diagram showing the tape running system of the above-mentioned tape recorder, and FIG. 2 is a diagram showing the recording locus on the tape by this tape recorder.

In Figure 2, CHI to CH6 are traced by Head 3 or Head 4, respectively, from A to B, B to C, C to D, D to E, E to F, and F to G in Figure 1. This is the area where audio signals are recorded during the period. Audio signals can be recorded separately in each area, and so-called azimuth overwriting is performed in each area, but the tracks in each area CHI to CH6 do not need to be on the same straight line. In addition, the pilot signals of the tracking control phase are recorded in each area, but it is assumed that they are recorded in a predetermined rotation (f+ → f2 → f, → fn) for each area, and there is also a correlation between the areas. There isn't.

Also, the area shown as CHI to CH3 is tape 1 in FIG.
Recording and reproduction are performed when the vehicle is traveling at a predetermined speed in the direction shown by arrow 7, and recording and reproduction is performed in the area indicated by CH2-CH2 when it is also traveling in the direction shown by arrow 9. Therefore, the second
As shown in the figure, the slope of each track in the area shown by CHI to CH3 is slightly different from the slope of each track in the area shown by CH2 to CH2. However, regarding the difference in relative speed at this time, the difference in relative speed due to the running of the tape 1 is extremely small compared to the difference due to the rotation of the heads 3 and 4, so it does not pose a problem.

Figure 3 is a time chart 1 of recording and reproducing a cheap record like a double series. In the figure, (a) is a phase detection knob (hereinafter referred to as PG) that is generated in synchronization with the rotation of cylinder 2.
“No\I level (H)” and “Low level (
It is a 30Hz square wave that repeats “L)”. Also, (b
) is a PG of opposite polarity to PG(a). Here, PC (a
) are H and P while the head 3 rotates from B to G in Figure 1.
G(b) is H while the head 4 rotates from B to G.
shall be.

Figure 3 (C) shows the data reading pulse obtained from PG (a), which is used to sample the audio signal every other field during the period corresponding to one field (1760 seconds) of the video signal. be. Figure 3(d) shows the sampled audio data for one field in R
The signal processing period for adding redundant codes for error correction or changing the arrangement using AM or the like is indicated by H.

In FIG. 3(e), the data recording period is indicated by H, and the timing at which the recording data obtained by the above-mentioned signal processing is recorded on the tape 1 is indicated.

For example, if we follow the flow of the signal in time using Fig. 3, t
The data sampled during the period from 1 to t3 (while head 3 is moving from B to G) is from t3 to t5 (when head 3 is moving from G to A)
Signal processing is performed at t5 to 6 (head 3 is A-B)
It is recorded between 3177. That is, the second
It is recorded in the CHI area in the figure. On the other hand, PG (b) is H
The data sampled during the period is subjected to signal processing at the same timing and recorded in the CH1 area by the head 4.

PG (a) at a predetermined phase (here, 36° for 1f4 area)
) The phase-shifted PG is shown in FIG. 3(f).

Hereinafter, a case will be described in which an audio signal is recorded using PG (f) and a PG (not shown) having the opposite characteristics.

The data sampled from t2 to t4 in FIG.
The signal is processed according to the signal shown in FIG. 3(g) between 76 and t7, and recorded according to the signal shown in FIG. 3(h) during the period from 76 to t7.

That is, data is recorded by the head 3 in the area indicated by CH2 in FIG. 2 during the period when the head 3 traces B-C. The data sampled during the period t4 to t7 is recorded by the head 4 in the area indicated by CH2.

Next, the operation of reproducing the signal recorded in the area indicated by CH2 will be explained.

Reading of data from tape 1 by head 3 is shown in FIG.
t6 to t7 (same for tl to L2) according to the signal shown in h)
t7 to t8 (
From t2 to t3), signal processing opposite to that during recording is performed. That is, error correction and the like are performed during this period, and a reproduced audio signal is output from t8 to t9 (t3 to te) in accordance with the signal shown in FIG. 3(j). Of course, the reproduction operation by the head 4 is performed in two consecutive operations with a phase difference of 180°, and thus a continuous reproduction audio signal is obtained.

It goes without saying that for other areas CH3 to CH6, it is sufficient to phase PG(a) by n x 36 degrees and perform the recording/playback operation described above based on this. It does not depend on the direction of travel.

For example, a tape recorder such as a duplex has 9 for each area.
It is extremely easy to make it possible to record 0 minutes of audio signals - making it possible to record up to 9 hours on wood tape. As a result, it takes time for the user to search for what has been recorded on which part of the tape. Therefore, when recording data corresponding to an audio signal,
It is conceivable to generate search data as a sub-information signal and record it at a predetermined position on each track.

However, retrieval efficiency cannot be improved if such retrieval data is reproduced by running the tape at the same speed as when it was recorded. However, if the tape running speed is increased, it will become difficult to reproduce this search data in the future.

<Object of the Invention> The present invention has been made in view of the above-mentioned drawbacks, and provides a rotary head type that can reliably reproduce the sub information signal recorded at a predetermined position of each track regardless of the running speed of the recording medium. The purpose is to provide a playback device.

<Description by Example> FIG. 4 is a diagram showing a schematic configuration of a cheap recorder as an example in which the present invention is applied to the above-mentioned tape recorder. Components in FIG. 4 that are similar to those in FIGS. 1 to 2 are designated by the same numbers.

PG obtained from the rotation detector 11 of the rotating cylinder 2 is supplied to the cylinder motor control circuit 16, which rotates the cylinder 2 at a predetermined rotation speed and a predetermined rotation phase. 12.
! 3 is flywheel 1 with capstan 14 and 15 respectively
7.18 rotation detectors, the outputs (FG) of which are alternatively supplied to a capstan motor control circuit 20 via a switch 19. The output of the circuit 20 is supplied to each capstan motor via a switch 21 so that the capstan 14 or the capstan 5 rotates at a predetermined speed during recording. Switches 19 and 21 are connected to the F side in the figure when the tape is run in the direction shown by arrow 7 (forward direction), and to the R side in the figure when the tape is made to run in the direction shown by arrow 9 (reverse direction).

By manually operating the operation unit 24, operation modes such as recording and reproduction, and areas to be recorded and reproduced are specified. It is also specified whether to record exclusively for audio or whether to record video signals in the recording pattern shown in FIG. 2 as well.

These data are supplied to the system controller 25, which controls the capstan motor control circuit 20, the switch 19.21, the area designation circuit 26,
It controls the gate circuit 27, ID signal control circuit 51, etc. Then, the area designation circuit 26 supplies the area designation data to the gate pulse generation circuit 23 to obtain a desired gate pulse. Incidentally, in the case where a video signal is also recorded, the designated area is naturally CHI.

The control gate pulses of the gate circuit 28 are determined based on the area designation data of the head 3. The aforementioned window pulses are selectively supplied to each of the heads 4.

During recording, the analog audio signal input from the terminal 29 is supplied to the PCM audio signal processing circuit 30, sampled at the above-described timing related to the window pulse, converted into digital data, and then subjected to the above-described signal processing. Further, along with this audio data, index (ID) data as described later is also generated. The recording audio data thus obtained is added by an adder 33 to the TPS generated by the pilot signal generation circuit 32 in a rotation of f, +f2→f3→f4 for each field, and other pilot signals to be described later. The output of the adder 3'3 is appropriately gated in the gate circuit 28 as described above, and the output is sent to the head 3.
．． 4, the data is written to the desired area.

At the time of reproduction, the reproduction signal of the head 3.4 is outputted in phase 1 by the gate circuit 28 by the same window pulse, and this reproduction signal is supplied to the lobal filter (LPF) 35 via the A side terminal of the switch 34, and is also supplied to the PCM. The signal is supplied to the audio circuit 30. Contrary to recording, the PCM audio circuit 30 performs error correction, time axis expansion, and digital
Signal processing such as analog conversion is performed, and a reproduced analog audio signal is output from the terminal 36.

The LPF 35 separates the aforementioned TPS and supplies it to the ATF circuit 37. The ATF circuit 37 is a circuit for obtaining a tracking error signal using a well-known four-frequency method, and it combines the reproduced tracking pilot signal and the pilot I signal generated by the pilot signal generation circuit 32 with the same rotation as during recording. It is well known that it is used. However, since the tracking error signal is obtained for each region, it is sampled and held at a timing as will be explained in detail later. The tracking error signal thus obtained is supplied to the capstan motor control circuit 20, which controls the running of the tape 1 during playback via the capstans 14 and 15 to perform tracking control.

Next, the function for recording and reproducing video signals will be explained.

When the system controller 25 issues a command to record and reproduce a video signal, the area designation circuit 26 is forced to
The Hl region is specified, and the gate circuit 27 is operated according to PG.

The video signal inputted from the terminal 38 is converted into a signal form suitable for recording by the video signal processing circuit 39 and sent to the post-adder 40.
supplied to Then, the adder 40 adds the pilot signal obtained from the pilot signal generation circuit 32, and the signal is added to the pilot signal obtained from the pilot signal generation circuit 32.
~CH6 is recorded. The recording operation of the PCM audio signal at this time is exactly the same as the recording operation described above for C)(1).

During playback, video signals picked up by the heads 3 and 4 are converted into continuous signals via a gate circuit 27. This continuous signal is supplied to a video signal processing circuit 39,
The original signal form is output from the terminal 41. Also,
The continuous signal obtained from the gate circuit 27 is supplied to the LPF 35 via the V-side terminal of the switch 34.

The LPF 35 continuously separates pilot signal components and supplies them to the ATF circuit 37. At this time, ATF circuit 3
The tracking error signal obtained from 7 does not need to be sampled and held, and is supplied as is to the capstan motor control circuit 20. At this time, a PCM audio signal is also reproduced from the CHI area, and an analog audio reproduction signal is obtained from the terminal 36, but tracking control using the output signal of the gate circuit 28 is not performed.

Next, an example of a data format that can be applied to the Kinio side will be explained. Figure 5 shows 1 of each area in Figure 2.
The data format recorded on the track, i.e. l/6
PCM compatible with 2-channel audio signal of 0 seconds
FIG. 3 is a diagram illustrating an example of a format of data including audio data.

In the data matrix shown in FIG. 5, the column indicated by sync c is a synchronization data column, the column indicated by address is an address data column, the columns indicated by P and Q are redundant data columns for error correction, and the column indicated by CRCC is a well-known data column. The CRCC check code data columns, DI, and D2 each include multiple columns, each with 2 columns.
This is a data string containing channel audio signal information. On the other hand, b(0) to b(3x"l) respectively indicate each row of this data matrix, and each row is recorded as one data block sequentially from the left side to the right side in the figure. For example, b The 5yrlC column data of (0) is followed by the address column data of b(0), and then the 2 column data of b(0), and so on.
After the final column data of fL), 5 sync column data of bl+1) is recorded, and when the final column data of b(3x-1) is recorded, data recording for one track is completed.

Here, in the first column included in Dl, b(0),
b(1'), b(x), b(x+1).

6 data (ID
O to ID5) are data containing information other than audio signal information.

The data shown in IDO to ID5 will be explained below using Tables 1 and 2. The 8-bit data indicated by IDO is data (mode designation data) that indicates what kind of information each data from IDI to ID5 corresponds to. IDI to ID4 for each mode of mode 1 to mode 6
It is assumed that each data represents the information shown in Table 1. That is, IDI to ID4 in mode 1 are time information as a tape counter, mode 2 is time information for each cut, mode 3. Mode 4 shows time information, mode 5 shows time information for each program, and mode 6 shows time information from the beginning of each tape.

1st entry Pro, /No is the program number, Cut/N
o indicates the cut number, and File/No indicates the file number.

Also, when considering a system that generally replaces data with all 0s when a data error occurs.

It is desirable to make it difficult for all O data to occur.
It is assumed that each data is the normal data and the inverted data of 04+1, such as all O's are 1.1 and 11111110.

The information indicated by the 8-bit data indicated by X and Y in Table 1 is the second
It is shown in the table. Y is ID5 in each mode from 1 to 7
The following data is shown. The first bit of this data Y indicates whether this 8-bit data Y itself is valid or invalid. Second. The third bit indicates the format of the audio signal, such as whether the audio information recorded in the two channels is monaural or stereo. Also the fourth. The fifth bit indicates whether audio signal information or other information is to be recorded in the first channel and second channel corresponding sections, respectively. Also the 6th
．． The seventh bit is data that becomes 1'' at the recording start and end portions of the audio signal, and the eighth bit is data that becomes "1" when it is desired to prevent dubbing.

On the other hand, 8-bit data X is data including information related to the present invention, and includes the following information as shown in Table 1. First, the first bit indicates whether X itself is valid and exists in Table 1, Table 2, or invalid. At this time, if we take into account a system in which all 0 data occurs when a data error like the one described above occurs, valid is "1'' and invalid is "o°
It is preferable to correspond as follows.

The second bit of X is data indicating the tape running direction during recording, and the third bit of X. 4th. The 5th bit is data indicating whether the next area to be recorded is CHI-CH6 or whether recording is to be stopped, or the 6th bit of X. The seventh bit is data indicating the track pitch of the recording track, X
The eighth bit is data that becomes "t" only for the portion corresponding to the silent part for cueing.

For example, if the level of the analog audio signal input from the terminal 29 is close to 0 level for a predetermined period or more, the data of the 8th bit of this .

The reproduction of this data X will be considered below.

In detail, we will consider how to reproduce this data X when the tape is run at high speed.

FIG. 6 is a diagram for explaining the relationship between tape running speed and playback output. Figure 6 (1-a).

(1-b) is 6x speed or 14x speed during recording, 6th speed,
Figure (2) is 11x or 19x speed, (3-a),
(3-b) is 16x speed or = 1414x speed 4) is 21x speed or -19x speed, (5-a), (5
-b) is 26x speed or -24x speed, (6-a),
(6-b) shows the envelope waveform of the reproduced output signal obtained when the tape is running at 41 times speed or 139 times speed, respectively.

In general, when reproducing a recording track on which so-called azimuth overwriting is performed alternately by the head 3 having an azimuth angle of +θ° and the head 4 having an azimuth angle of -θ°, during recording (2
n-1) When the tape is run at double speed (n is an arbitrary integer), the envelope waveforms of heads 3 and 4 match. (2), (4), and (6-a) in Fig. 6 are 1g immediately after the rotating heads 3 and 4 enter the designated area. (Just Track It is assumed that the track pitch and head width are equal.

On the other hand, when running the tape at double speed (2n) during recording,
If the rotating head 3 traces the plus azimuth track (the track recorded by the head 3) with a rack when entering the designated area, then the rotating head 4 also just tracks the plus azimuth track when entering the designated area. Put it away. Therefore, the envelope waveforms of heads 3 and 4 are complementary to the highest level. (1-a) in FIG.

(3-a) and (5-a) are envelope waveforms of the playback output of the head 3 when the rotating head 3 is just tracking a certain track recorded by the head 3 immediately after entering the designated area. , (1-
b), (3-b).

(5-b) shows the envelope waveform of head 4 at this time.

The left end of each envelope waveform in FIG. 6 shows the entry timing for the specified area, and the right end shows the trace end timing for the specified area. That is, heads 3 and 4 are 36
This is an envelope waveform during the rotation (1/300 seconds).The data matrix shown in FIG. It is assumed that the sync of the data shown in Fig. 5 is 3.
If the bits and CRCC are 16 bits and all others are 8 bits, IDO and IDI are recorded at approximately the timing when heads 3 and 4 rotate after entering the specified area (36 is the same (36X0.
39)', ID4 and ID5 are also (3 6 Xo
．． 84) 'Recorded at the timing of rotation. The positions in Figure 6 corresponding to this recording position are A, B, and C in the figure, respectively.
This is the part indicated by .

That is, the conditions for reproducing IDO and IDI are such that a large reproduction output can be obtained at the timing A in FIG. 6. Ideally, it is sufficient to just track an arbitrary track with the same azimuth angle at this timing. Also, ID2.

When reproducing ID3, it is necessary to similarly obtain a large reproduction output at timing B, and as conditions for reproducing ID4 and ID5, similarly, a large reproduction output may be obtained at timing C.

As is clear from the above explanation, when the tape is run at 2n times the recording speed, data recorded at a position where a larger playback output than head 3 can be obtained will have a larger playback output from head 4. cannot be obtained. Therefore I
When trying to play back D data by running the tape at high speed,
Increasing the tape running speed by 2n times is disadvantageous because it is necessary to record the required 10 data continuously on 4n tracks and the ID data mode cannot be changed during this time.

Therefore, ideally, the tape running speed should be (2n-1) times the recording speed so that a large playback output can be obtained at the desired timing. Now, if it is desired to reproduce only data X, it is understood that it is sufficient to reproduce only IDO and IDI. In other words, the tape running speed is (2n
-1) Double the speed, and at the timing of A above, head 3,
It can be seen that data X can be reproduced reliably and quickly if both of the data X are just tracked with respect to the track on which they themselves have been recorded.

Next, a case will be considered in which it is desired to reproduce all of IDO to ID5. As mentioned above, IDO, ID2, and ID4 are recorded at positions separated from each other by a distance corresponding to 9 degrees of rotation of the rotary heads 3 and 4, and IDO and IDI, ID2 and ID
3. ID4 and ID5 are recorded at almost the same position. Therefore, the running speed of the tape is selected so that the head 3.4 crosses two tracks while rotating 9 degrees, and A.
If a just track is achieved at any one of timings B and C, it will naturally be just tracked at other timings of A, B, and C as well. The tape speed that satisfies this condition is [2X (180'/90')
0m + 1) times the speed. However, m is an integer.

FIG. 6 (6-b) shows the envelope waveform of the reproduced output signal when the tape is run at 41 times the recording speed or 139 times the recording speed and just track is achieved at timing A. As is clear from the figure, the playback output of head 3.4 is maximum at all timings A, B, and C, and IDO ~
All ID5s can be played well.

FIG. 7 is a diagram showing the relationship between the trace trajectories of the heads 3 and 4 and the recording tracks when obtaining the envelope waveform shown in FIG. 6 (6-b). In the figure, St is the trace trajectory by the plus azimuth head, S2 is the trace trajectory by the minus azimuth head, and each diagonal straight line is the boundary of the recording track.

B and C are IDO and IDI, ID2 and ID3 respectively.

The recording positions of ID4 and ID5 are shown respectively. Further, hatched portions indicate portions where reproduced output can be obtained. As is clear from FIG. 7, it can be seen that all ID data is reproduced.

Next, a specific example of a circuit for achieving good reproduction of ID data during such high-speed tape running will be described.

FIG. 8 is a diagram showing a specific example of the circuit configuration of the ATF circuit 37 in FIG. 4. In Figure 8, 80 is LPF3
5 to which the reproduction TPS is supplied, and 91 to which the pilot signal generation circuit 32 supplies the same rotation (
f1 → f2 → f3 → fa) terminals to which TPS is supplied,
92 is a terminal to which PG is supplied. These signals
Multiplier 81. BPF82, 83, detection circuit (DET
) 84, 85, a comparator 86, an inverting amplifier 87, and a switch 88. A tracking error signal is obtained from the switch 88.

This tracking error signal is sent to the sample hold circuit 8.
After being sampled and held at 9, the signal is supplied to the capstan control circuit 20 via a terminal 90 to control tape running.

This control is performed so that the head 3.4 is just tracked at the timing when the sample and hold circuit 89 samples and holds.

Is this sample hold timing the system controller? It is determined based on the data provided by 5. The system controller 25 supplies the comparator 96 with data determined based on the information on the specified area and the information on search playback or normal playback described above.

An edge detection circuit 94 detects the edge of the PG and supplies a 60 Hz pulse signal to the reset terminal of the counter 95. Counter 95 counts clock signals of a predetermined frequency supplied from oscillator 93. This clock signal is sufficiently large for 60Hz. The count data of the counter 95 is compared with the data supplied from the aforementioned system controller 25 in a comparison circuit 96, and when these data match, the comparison circuit 96 supplies the pulse signal to the sample hold circuit 89 as a sampling pulse.

For example, if the frequency of the clock signal output from the oscillator 93 is 3 KHz and the tracking error signal is sampled at the center of each area during normal playback, the data from the system controller 25 is 100x.
+50 (x is an integer). On the other hand, when the tape runs at high speed,
If you want the head to just track at the timing indicated by A above, it will be 100x+14.

As described above, ID data can be reproduced extremely well.

By the way, the signal processing system for obtaining the tracking error signal was not changed at all at this time, because it was assumed that the tape running speed was (4Q+1) times (where days are integers) the recording speed.

As is clear from the above explanation, if the tracking error signal is sampled at a timing related to the recording position of desired ID data, the ID data can be reliably reproduced. The reason for choosing the relevant timing here is as follows. One reason is that even if the desired ID data is not sampled at the timing when the head traces it, the same effect can be obtained by calculating from the tape running speed and sampling the desired ID data at the timing when the head traces it. . The second reason is that desired ID data can be reproduced even if the track is not completely just tracked. That is, if the head width is considerably wider than the track pitch and if the ID data can be reproduced from the reproduced output from a portion of about 172 of the track pitch, it is considered that there is considerable margin for the above-mentioned ideal timing.

Here we will summarize the tape running speed during search. If it is simply desired to reliably reproduce desired ID data, an integer multiple of the recording speed is sufficient. If it is desired to perform detection more quickly or to reduce the number of consecutive tracks on which desired ID data is recorded, it is desirable to set the speed to (2n+1) times. Furthermore, if it is not desired to change the design of the tracking control circuit, it is desirable to increase the speed by (4Jl+1). Furthermore, if it is desired to quickly reproduce all the ID data (IDO to ID5) in the ID data format as described above, the speed may be increased by, for example, (40 m + 1).

Finally, recording and reproducing of this ID signal will be explained in detail. FIG. 9 is a diagram showing a specific example of the PCM audio signal processing circuit in FIG. 4.

In FIG. 9, 101 is a terminal to which the input analog audio signal input to terminal 29 is supplied, and 102 is an I
This is a terminal to which output data from the D control circuit 51 is supplied. Here, the ID control circuit 51 is the system controller 2
ID data according to Tables 1 and 2 is formed as parallel data based on the data obtained from 5 and the input analog audio signal.

The parallel data supplied to the terminal 102 is supplied to the ID generation circuit 104, which generates serialized data at a predetermined timing.

On the other hand, an analog audio signal input to the terminal 101 is supplied to an analog-digital converter (A/D) 103. The A/D 103 samples the analog audio signal at a predetermined frequency, quantizes it, and supplies it to the data selector 105 as serial data at a predetermined timing. The data selector 105 selects the ID data generating circuit 10 once per field period at a timing corresponding to the IDI.
4 output to RAM (random access memory) 107
and at other timings, the output of A/D103 is supplied to R.
Supplied to AM107. The RAM 107 stores the parity word (P) obtained from the error correction circuit (ECC) 106.
, Q), CRCC, etc., address data obtained from the address controller 108 and data obtained from the data selector 105 described above are arranged so as to correspond to the data matrix shown in FIG. The time-base compressed data is supplied from the RAM 107 to the modulation circuit 109 in the above-mentioned order.
The modulation circuit 109 performs digital modulation such as BPM (pi, phase, modulation) and then outputs the signal to the terminal 111.
Output via . The digitally modulated audio signal output from the terminal 111 is supplied to the adder circuit 33 as described above.

Next, the operation during playback will be explained. A digital modulation signal sent to a terminal 112 via a gate circuit 28 is demodulated by a digital demodulator 113 and supplied to the RAMI 15. In the RAM 115, signal processing that is completely opposite to that in the RAM 107 is performed.

That is, the arrangement is changed based on the address data obtained from the address controller 114 and further on the synchronization data, and error correction is performed in the ECC 116. In addition, along with this, each data of the D1 column and D2 column obtained is output from the RAM 115, and the D/A (digital-to-analog converter) 1
17, is supplied to the data reading circuit 118.

The D/A 117 restores the original analog audio signal and outputs it from the terminal 36 in FIG. 4 via the terminal 119. On the other hand, the data reading circuit 118 picks up the aforementioned ID data and supplies it to the ID detection circuit 52. Furthermore, the 8th
It is assumed that the operations of each part of the signal processing circuit shown in the figure are all synchronized by a timing signal generated by the timing controller 110.

The ID detection circuit 52 searches for ID data and supplies information as shown in Tables 1 and 2 to the system controller 25. Of course, the aforementioned track pitch information is also supplied to the system controller 25 at least once every second. According to these data, the system controller 25 controls the area designation circuit 26 and the capstan control circuit 2.
Controls 0. For example, when the ID detection circuit 52 supplies data corresponding to the information that the specified area is recorded on the LP during playback by the SP, the capstan control circuit 20 controls the rotation speed of the capstan by 1.
/2.

Further, for example, when the ID detection circuit 52 supplies information indicating that the section corresponds to a silent portion by the above-described search playback, the capstan control circuit 20 is caused to stop the tape.

In addition, in the ``double embodiment'', a tape recorder is described in which six areas are formed in the longitudinal direction of the tape and recording tracks are sequentially formed in each area, but the scope of application of the present invention is not limited to this. There is no conventional VTR.
, DAT, etc.

<Description of Effects> As explained above, according to the present invention, by controlling the running of the recording medium based on the tracking signal that is reproduced at a timing related to the recording position of the sub information signal, the predetermined position of each track is determined. To obtain a rotary head type reproducing device capable of reliably reproducing a sub information signal recorded on a recording medium regardless of the running speed of the recording medium.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a tape running system of a tape recorder according to an embodiment of the present invention, FIG. 2 is a diagram showing a recording format of the recorder shown in FIG. 1, and FIG. 3 is a diagram showing the recorder shown in FIG. 1. 4 is a diagram showing a schematic configuration of a tape recorder as an embodiment of the present invention. FIG. 5 is a data matrix for explaining the recording data format by the recorder of this embodiment. FIG. 6 is a diagram for explaining the relationship between the tape running speed and the playback output for each track i. FIG. 7 is a diagram showing the relationship between the ideal head trace locus and the recording track. 8 is a diagram showing an example of a specific circuit configuration of the ATF circuit in FIG. 4, and FIG. 9 is a diagram showing a specific example of the PCM audio signal processing circuit in FIG. 4. 1 is a magnetic tape as a recording medium, 3 and 4 are rotary heads, 20 is a capstan control circuit, 24 is an operating section, 2
5 is a system controller, 30 is a PCM audio signal processing circuit, 32 is a pilot signal generation circuit, and 37 is A
TF circuit, 51 is an In control circuit, 52 is an ID detection circuit,
89 is a sample hold circuit, 96 is a comparison circuit, A, B
. C indicates the timing at which the ID data is traced.

Claims (1)

[Claims] A device for reproducing a main information signal using a rotating head from a recording medium in which a sub information signal is recorded only at a predetermined position, and a large number of tracks in which a main information signal and a tracking signal are recorded are formed in parallel. When the recording medium is run at a speed different from that during recording and only the sub information signal is reproduced, the recording is performed based on the tracking signal that is reproduced at a timing related to the recording position of the sub information signal. A rotary head type playback device characterized by controlling the running of a medium.