JP2502278B2 - Rotating head type regenerator - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary head type reproducing apparatus, and particularly to a main information signal from a recording medium in which a number of tracks in which sub information signals are recorded are formed in parallel only at a predetermined position. The present invention relates to a device for reproducing.

<Description of Prior Art> Hereinafter, as an apparatus of this type, an audio tape recorder for digitally recording the audio signal as a main information signal on a time axis and digitally modulating it with a rotary head will be described as an example of this type of apparatus.

FIG. 1 is a diagram showing an example of a tape running system of a conventional audio tape recorder of this type. In Figure 1
Is a magnetic tape, and 2 is a rotating cylinder that holds the rotating heads 3 and 4. As a result, the heads 3 and 4 trace the tape 1 diagonally and record audio signals. Each time the heads 3 and 4 are rotated by 36 °, an audio signal whose time axis is compressed in each of the six areas formed in the longitudinal direction of the tape 1 is recorded, so that a total of six channels of audio signals can be recorded. A special tape recorder can be obtained.

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

In FIG. 2, CH1 to CH6 are head 3 and head 4, respectively, from A to B, B to C, C to D, D to E, E in FIG.
To F and F to G are areas where an audio signal is recorded. An audio signal can be separately recorded in each area, and so-called azimuth overwriting is performed respectively. However, the tracks of the areas CH1 to CH6 do not need to be on the same straight line. A pilot signal for tracking control is recorded in each area, and it is assumed that a pilot signal is recorded in each area in a predetermined rotation (f ₁ → f ₂ → f ₃ → f ₄ ). There is no correlation between them.

Areas indicated by CH1 to CH3 are recorded and reproduced when the tape 1 is running at a predetermined speed in a direction indicated by an arrow 7 in FIG. 1, and areas indicated by CH4 to CH6 are also indicated in an arrow 9 direction. Recorded and played back while driving. Therefore, as shown in FIG. 2, the inclination of each track in the area shown in CH1 to CH3 and CH4 to C
The slope of each track in the area indicated by H6 is slightly different. However, at this time, the difference between the relative speeds caused by the running of the tape 1 is extremely small compared to the difference caused by the rotation of the heads 3 and 4, so that no problem occurs.

FIG. 3 is a time chart for recording and reproduction of the tape recorder as described above. In the figure, (a) is a phase detection pulse (hereinafter, PG) generated in synchronization with the rotation of the cylinder 2, which has a frequency of 30 Hz which repeats "high level (H)" and "low level (L)" in 1/60 seconds. It is a square wave. (B) is a PG having a polarity opposite to that of the PG (a). Here, it is assumed that PG (a) is H while the head 3 rotates from B to G in FIG. 1, and PG (b) is H while the head 4 also rotates from B to G in FIG.

FIG. 3 (c) is a pulse for reading data obtained from PG (a), which is for sampling the audio signal for every one field of the video signal (1/60 seconds) every other field. is there. FIG. 3 (d) shows a signal processing period H for adding a redundant code for error correction or changing the arrangement of the sampled audio data for one field using a RAM or the like. FIG. 3 (e) shows the period of data recording by H, and shows the timing at which the recording data obtained by the above-described signal processing is recorded on the tape 1.

For example, if the signal flow is temporally followed using FIG. 3,
Data sampled during the period from t1 to t3 (head 3 is moving to BG) is subjected to signal processing from t3 to t5 (head 3 is G to A), and t5 to t6 (head 3 is A to B). ). That is, it is recorded by the head 3 in the area of CH1 in FIG. On the other hand, data sampled during the period when PG (b) is H is subjected to signal processing at the same timing, and is recorded in the area of CH1 by the head 4.

FIG. 3 (f) shows a PG in which PG (a) is phase-shifted by a predetermined phase (here, 36 ° for one area).

Hereinafter, a case where an audio signal is recorded by PG (f) and a PG (not shown) having an opposite characteristic will be described. Third
The data sampled in FIGS. T2 to t4 is subjected to signal processing according to the signal shown in FIG. 3 (g) during t4 to t6, and recorded according to the signal shown in FIG. 3 (h) during the period t6 to t7. That is, the data is recorded in the area indicated by CH2 in FIG. 2 by the head 3 while the head 3 traces B to C. Sync to t4
The data sampled during the period from to t7 is recorded by the head 4 in the area indicated by CH2.

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

The reading of data from the tape 1 by the head 3 is performed from t6 to t7 (the same applies to t1 to t2) according to the signal shown in FIG. 3 (h), and is read from t7 to t8 (t2) according to the signal shown in FIG. 3 (i). The signal processing reverse to that at the time of recording is performed at t3). That is, error correction is performed during this period, and then t8 is applied in accordance with the signal shown in FIG.
The playback audio signal is output at ~ t9 (t3 ~ t6). Of course, the reproducing operation using the head 4 is performed with a phase difference of 180 ° from the above-mentioned operation, whereby a continuous reproduced audio signal is obtained.

Also, for other areas CH3 to CH6, PG (a) is set to n × 36.
It is needless to say that the recording and reproducing operations described above may be performed based on the phase shift of .degree., And this does not depend on the tape running direction.

The tape recorder as described above has, for example, 90 for each area.
It is extremely easy to record a minute audio signal, and it is possible to record for 9 hours on a single tape.
As a result, it takes time for the user to search what is recorded on which part of the tape. Therefore, when recording the data corresponding to the audio signal, it is possible to generate search data as a sub information signal and record it at a predetermined position on each track.

However, the search efficiency cannot be improved if the tape is played back at the same running speed as when recording the search data as described above. However, if the tape running speed is increased, it will be difficult to reproduce the search data in the future.

<Objects of the Invention> The present invention has been made in view of the above-mentioned drawbacks, and an object of the present invention is to provide a rotary head type reproducing apparatus capable of surely reproducing a dispersedly recorded sub-information signal.

<Explanation by Embodiment> FIG. 4 is a diagram showing a schematic configuration of a tape recorder as one embodiment in which the present invention is applied to the above-mentioned tape recorder. 4, the same components as those in FIGS. 1 and 2 are denoted by the same reference numerals.

The PG obtained from the rotation detector 11 of the rotary cylinder 2 is supplied to a cylinder motor control circuit 16 to rotate the cylinder 2 at a predetermined rotation speed and a predetermined rotation phase. Reference numerals 12 and 13 denote rotation detectors of the flywheels 17 and 18 of the capstans 14 and 15, respectively. These outputs (FG) are selectively supplied to a capstan motor control circuit 20 via a switch 19. The output of the circuit 20 is a capstan 14 or 15 at the time of recording.
Are supplied to the respective capstan motors via the switch 21 so that the rotation speed of the motor becomes a predetermined speed. The switches 19 and 21 are connected to the F side in the drawing when the tape is run in the direction (forward direction) shown in the arrow 7, and to the R side in the drawing when running the tape in the direction (reverse direction) shown in the arrow 9.

By manually operating the operation unit 24, an operation mode such as recording and reproduction and an area to be recorded and reproduced are designated. In addition, it is specified whether recording is to be performed exclusively for audio or video signals are to be recorded in the recording pattern shown in FIG.

These data are supplied to the system controller 25, and the system controller 25 controls the capstan motor control circuit 20, the switches 19 and 21, the area designation circuit 26, the gate circuit 27, the ID signal control circuit 51 and the like. Then, the area specifying circuit 26 supplies the area specifying data to the gate pulse generating circuit 23 to obtain a desired gate pulse. The area specified when recording a video signal is of course CH1.
Becomes

As the control gate pulse for the gate circuit 28, the above-described window pulse is selectively supplied to each of the head 3 and the head 4 based on the area designation data.

At the time of recording, the analog audio signal input from the terminal 29 is supplied to the PCM audio signal processing circuit 30, where it is sampled at the above-described timing relating to the window pulse, converted into digital data, and then subjected to the above-described signal processing. In addition to this audio data, index (ID) data as will be described later is also generated. The audio data for recording thus obtained is added by the adder 33 to the TPS generated by the rotation of f ₁ → f ₂ → f ₃ → f _{4 by} the pilot signal generating circuit 32 and other pilot signals which will be described later. To be done. The output of the adder 33 is appropriately gated by the gate circuit 28 as described above, and written in a desired area by the heads 3 and 4.

At the time of reproduction, the reproduced signals of the heads 3 and 4 are also extracted by the gate circuit 28 by the window pulse, and this reproduced signal is supplied to the low-pass filter (LP) through the A-side terminal of the switch 34.
F) 35 and the PCM audio circuit 30. In the PCM audio circuit 30, signal processing such as error correction, time axis expansion, digital-analog conversion, etc. is performed in the reverse of recording, and the reproduced analog audio signal is supplied to a terminal 36.
Output more.

The LPF 35 separates the above TPS and supplies it to the ATF circuit 37. A
The TF circuit 37 is a circuit for obtaining a tracking error signal according to a well-known four-frequency system. The reproduced pilot signal for tracking and the pilot signal generated by the pilot signal generating circuit 32 at the same rotation as during recording are used. It is well known to use. However, since the tracking error signal is obtained for each area, the tracking error signal is sampled and held at a timing described in detail later. The tracking error signal thus obtained is supplied to the capstan motor control circuit 20, and the tape 1 during reproduction is reproduced.
The vehicle is controlled through the capstans 14 and 15 to perform the tracking control.

Next, a function of recording and reproducing a video signal will be described. When a command for recording and reproducing a video signal is issued from the system controller 25, the area designating circuit 26
The region 1 is designated, and the gate circuit 27 is operated according to the PG. The video signal input from the terminal 38 is converted into a signal form suitable for recording by the video signal processing circuit 39 and supplied to the post-adder 40. Then, the adder 40 adds the pilot signal obtained from the pilot signal generating circuit 32 to the gate signal 27, and through the gate circuit 27, the areas CH2 to CH6 by the heads 3 and 4.
Is recorded in the part. The recording operation of the PCM audio signal at this time is exactly the same as the above-mentioned recording operation for CH1.

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

In LPF35, the pilot signal component is separated continuously and ATF
The signal is supplied to the circuit 37. At this time, the tracking error signal obtained from the ATF circuit 37 does not need to be sampled and held, and is supplied to the capstan motor control circuit 20 as it is. At this time, the PCM audio signal is also reproduced from the area of CH1, 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 the data format applicable to this embodiment will be described. FIG. 5 shows the data format recorded in one track of each area in FIG. 2, that is, 1/60
It is a figure which shows an example of the format of the data containing the PCM audio data corresponding to the 2 channel audio signal of second.

In the data matrix shown in FIG. 5, the column indicated by sync is a data column for synchronization, the column indicated by address is an address data column, the columns indicated by P and Q are redundant data columns for error correction, CRCC, respectively.
The columns indicated by are the well-known CRCC check code data columns, D1, D2
Is a data string including a plurality of columns, each containing audio signal information of 2 channels. On the other hand, b (0) to b
(3x-1) indicates each row of the data matrix,
Each row is sequentially recorded as one data block from the left side to the right side in the figure. For example, b
Next to the sync column data of (0), the address column data of b (0) is recorded, and then, the P column data of b (0) is sequentially recorded. After the last column data of b (l), b
When the sync column data of (l + 1) is recorded and the last column data of b (3x-1) is recorded, data recording for one track is completed.

Here, b (0), b in the first column included in D1
6 of (1), b (x), b (x + 1), b (2x), b (2x + 1)
The two pieces of data (ID0 to ID5) are data including information other than the audio signal information.

The data shown in ID0 to ID5 will be described below with reference to Tables 1 and 2. The 8-bit data indicated by ID0 is I
It is data (mode designation data) for suggesting what information each data of D1 to ID5 corresponds to. It is assumed that each data of ID1 to ID4 in each mode of mode 1 to mode 6 is data showing the information shown in Table 1. That is, ID1 to ID4 in mode 1 are time information as a tape counter, those in mode 2 are time information for each cut, mode 3 and mode 4
In the case of mode 5, that of time mode 5, that of mode 5 shows time information for each program, and that of mode 6 shows time information from the head portion of each tape.

In Table 1, Pro./No is the program number, Cut / No is the cut number, and File / No is the file number. In general, in consideration of a system in which a data error occurs and all-zero data is replaced, it is desirable to make it difficult for all-zero data to be generated.
It is assumed that normal data and data 01 are inverted, such as 111110.

The information indicated by the 8-bit data indicated by X and Y in Table 1 is the second
Shown in the table. Y indicates the data of ID5 in each mode of 1 to 7. The first bit of the data Y indicates whether the 8-bit data Y itself is valid or invalid. The second and third bits indicate the form of the audio signal such as whether the recorded audio information of the above-mentioned 2 channels is monaural or stereo. The fourth and fifth bits indicate whether audio signal information or other information is recorded in the first channel and second channel corresponding portions, respectively. The 6th and 7th bits are "1" at the recording start part and the recording end part of the audio signal.
The 8th bit is data that becomes "1" when it is desired to prevent dubbing.

On the other hand, the 8-bit data X is data including the information according to the present invention, and includes the following information as shown in Table 1. First,
In the first bit, X itself is valid Indicates if present or invalid. At this time, in consideration of a system in which all 0 data is generated when a data error as described above occurs, it is preferable to correspond such that valid is "1" and invalid is "0".

The second bit of X is data indicating the tape running direction at the time of recording, and the third, fourth, and fifth bits of X are CH for the next recording area.
One of 1 to CH6, or data indicating the next track number for stopping recording, the 6th and 7th bits of X are data indicating the track pitch of the recording track described above, and the 8th bit of X is for cueing. The data is "1" only for the part corresponding to the silent part.

The data of the eighth bit of X is, for example, data for a predetermined period, that is, a predetermined track number "1" 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 reproduction of the data X will be considered below. Specifically, a method of reproducing this data X when the tape is run at high speed will be considered.

FIG. 6 is a diagram for explaining the relationship between the tape running speed and the reproduction output. 6 (1-a) and (1-b) are 6x speed or -4x speed during recording, respectively, and FIG. 6 (2) is 11x speed or -9x speed, (3-a), (3-b). ) Is 16x speed or -14x speed, (4) is 21x speed or -19x speed, (5-
a) and (5-b) are 26x speed or -24x speed, (6-
Reference numerals a) and (6-b) show envelope waveforms of reproduction output signals obtained when the tape is run at 41 times speed or -39 times speed, respectively.

Head 3 and -θ °, which generally have an azimuth angle of + θ °
When reproducing a recording track in which the so-called azimuth overwriting is alternately performed with the head 4 having the azimuth angle of, the head 3 and the head 3 are used when the tape is run at a recording speed of (2n-1) (n is an arbitrary integer). The envelope waveforms of the head 4 match. (2), (4), and (6-a) in FIG. 6 indicate that a track recorded by the heads 3 and 4 is completely tracked immediately after the rotary heads 3 and 4 plunge into the designated area. It is assumed that the envelope waveform is the case (Just Track) and the track pitch and head width are equal.

On the other hand, when running the tape at double speed during recording (2n),
If the rotary head 3 traces a plus azimuth track (a track recorded by the head 3) with the just track when entering the designated area, the rotary head 4 will also be just tracked when entering the designated area with respect to the plus azimuth track. Therefore, the envelope waveforms of head 3 and head 4 are complementary to the highest level. (1-a), (3-a), (5- in FIG.
(a) is an envelope waveform of reproduction output of the head 3 when the rotary head 3 is just tracked to 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 the head 4 at this time.

The left end of each envelope waveform in FIG. 6 shows the rush timing to the designated area, and the right end shows the trace end timing of the designated area. That is, heads 3 and 4 are 36 °
This is the envelope waveform during rotation (1/300 seconds). Here, it is assumed that the data matrix shown in FIG. 5 is recorded from the timing at which the rotary heads 3 and 4 rotate 5 ° after entering the designated area to the timing at which they rotate 31 °.
At this time, the data sync shown in FIG. 5 is 3 bits and CRCC is
If 16 bits are used and all others are 8 bits, ID0 and ID1 are recorded at the timing when heads 3 and 4 entered the designated area and rotated approximately (36 × 0.14) °, and ID2 and ID3 were the same (36 × 0.39).
°, ID4 and ID5 are recorded at the same (36 × 0.64) ° rotation timing. Positions in FIG. 6 corresponding to the recording positions are portions indicated by A, B, and C in the drawing, respectively.

That is, as a condition for reproducing ID0 and ID1, it is sufficient to obtain a large reproduction output at the timing A in FIG.
Further, ideally, it is sufficient to just track the arbitrary track having the same azimuth angle at this timing. Similarly, when reproducing ID2 and ID3, a large reproduction output may be obtained at the timing of B similarly, and as a condition of reproducing ID4 and ID5, similarly at the timing of C.

As is clear from the above explanation, when the tape is run at a speed 2n times faster than that at the time of recording, the data recorded at the position where the reproduction output larger than that of the head 3 is obtained, on the contrary, the large reproduction output from the head 4 is obtained. Can't get Therefore ID
When trying to reproduce the data by running the tape at high speed, increasing the tape running speed by 2n means that the required ID data must be recorded continuously for 4n tracks, and the ID data mode is changed during this time. It is disadvantageous because you cannot

Therefore, it is ideal that the tape running speed is set to (2n-1) times the recording speed, and a large reproduction output can be obtained at a desired timing. Now, if it is desired to reproduce only the data X, it will be understood that it is sufficient to reproduce only ID0 and ID1. That is, if the tape running speed is set to (2n-1) times the recording speed, and the heads 3 and 4 are both made to be a just track with respect to the track recorded by themselves at the timing of the above-mentioned A, the reproduction of the data X is performed. It turns out that it is done reliably and quickly.

Next, consider the case where it is desired to reproduce all of ID0 to ID5. ID0, ID2, and ID4 are rotating heads 3 and 4 of 9 as described above.
They are recorded at positions separated by a distance corresponding to a rotation of a minute, and ID0 and ID1, ID2 and ID3, and ID4 and ID5 are recorded at almost the same position. Therefore, while the heads 3 and 4 rotate 9 °, the tape running speed is selected so as to traverse the 2n track, and if the just track is aimed at any one of A, B, and C, other tracks of A, B, and C Of course, the timing will be just track. The tape speed that satisfies this condition is [2 × (180 ° / 9 °) × m + 1] times the recording speed, that is, (40m + 1)
It means double speed. However, m is an integer.

FIG. 6 (6-b) shows the envelope waveform of the reproduction output signal when the tape is run at 41x speed or -39x speed at the time of recording, and the just track is achieved at the timing of A. As is clear from the figure, the reproduction output of heads 3 and 4 is maximum at all timings A, B, and C, and ID0 to ID5 can all be reproduced well.

FIG. 7 is a diagram showing the relationship between the trace trajectories of the heads 3 and 4 and the recording track when the envelope waveform shown in FIG. 6 (6-b) is obtained. In the figure, S1 is the trace trajectory with the plus azimuth head, S2 is the trace trajectory with the minus azimuth head, and each diagonal straight line is the boundary of the recording track.
A, B, and C indicate the recording positions of ID0 and ID1, ID2 and ID3, ID4 and ID5, respectively. Further, the hatched portions respectively indicate the portions where the reproduction output can be obtained. As can be seen from FIG. 7, all ID data are reproduced.

Next, a specific circuit example for realizing 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. In FIG. 8, 80 is a terminal to which the reproduction TPS is supplied from the LPF 35, and 91 is a pilot signal generation circuit 3
The same rotation (f ₁ → f ₂ → f ₃ →
f ₄ ) is a terminal to which TPS is supplied, and 92 is a terminal to which PG is supplied. By processing these signals with a signal processing circuit including a multiplier 81, BPFs 82 and 83, detection circuits (DET) 84 and 85, a comparator 86, an inverting amplifier 87, and a switch 88,
The tracking error signal is obtained from the switch 88. This tracking error signal is sampled and held by the sample and hold circuit 89, and then supplied to the capstan control circuit 20 via the terminal 90 to control the tape running. This control is performed so that the heads 3 and 4 are just tracked at the timing of sampling and holding by the sample and hold circuit 89.

The sample hold timing is determined based on the data supplied from the system controller 25. The system controller 25 supplies to the comparator 96 the information of the designated area and the data determined by the information of the above-mentioned search reproduction or normal reproduction.

94 is an edge detection circuit, which detects the edge of PG,
A 60 Hz pulse signal is supplied to the reset terminal of the counter 95. The counter 95 counts the clock signal of a predetermined frequency supplied from the oscillator 93. This clock signal is 60Hz
Big enough for. The count data of the counter 95 is compared with the data supplied from the system controller 25 in the 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, when the frequency of the clock signal output from the oscillator 93 is set to 30 KHz and the tracking error signal is sampled at the center of each area during normal reproduction, the data from the system controller 25 is 100x + 50 (x
Is an integer). On the other hand, if the head is to be just tracked at the timing indicated by A when the tape is running at high speed, the value is 100x + 14.

As described above, the ID data can be reproduced extremely well.
At this time, the signal processing system for obtaining the tracking error signal was not changed at all, because it was assumed that the tape running speed was (4l + 1) times (l is an integer) at the time of recording.

As is clear from the above description, if the tracking error signal is sampled at the timing related to the recording position of the desired ID data, the ID data can be surely reproduced. The reason for setting the relevant timing here is as follows. One is to calculate the timing at which the head will trace the desired ID data by calculating from the rotational speed of the head without sampling at the timing obtained by detecting that the head has traced the desired ID data. This is because the same effect can be obtained by calculating in advance and sampling at this timing. The second reason is that desired ID data can be reproduced even if the track is not completely tracked. That is, if the head width is considerably wider than the track pitch and the ID data can be reproduced from the reproduction output from about a half of the track pitch, it is considered that there is a considerable margin for the above ideal timing.

Here is a summary of the tape running speed during search. If it is desired to simply reproduce the desired ID data, it may be an integral multiple speed during recording. And if it is desired to detect the ID data more quickly or if the number of continuous tracks for recording desired ID data is to be reduced, it is desirable that the speed is (2n + 1) times. Further, if it is not desired to change the design of the tracking control circuit, it is desirable that the speed is (4l + 1) times. Further, if it is desired to quickly reproduce all the ID data (ID0 to ID5) in the ID data format as described above, the speed may be (40 m + 1) times, for example.

Finally, recording / reproducing of this ID signal will be described in detail. FIG. 9 is a diagram showing a specific example of the PCM audio signal processing circuit in FIG. In FIG. 9, 101 is a terminal to which the input analog audio signal input to the terminal 29 is supplied, and 102 is a terminal to which the output data from the ID control circuit 51 is supplied. Here, the ID control circuit 51 forms the ID data according to Tables 1 and 2 as parallel data based on the data obtained from the system controller 25 and the input analog audio signal.

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

On the other hand, the analog audio signal input to the terminal 101 is supplied to an analog-to-digital converter (A / D) 103.
In the A / D 103, the analog audio signal is sampled at a predetermined frequency, quantized, and supplied to the data selector 105 as serial data at a predetermined timing. The data selector 105 supplies the output of the ID data generation circuit 104 to the RAM (random access memory) 107 at a timing corresponding to ID1 once in one field period, and the A / D 103 at other timings.
Is supplied to the RAM 107. In the RAM 107, the parity word (P, Q) obtained from the error correction circuit (ECC) 106, the CRCC
For example, address data and the like 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-axis-compressed data is supplied from the RAM 107 to the modulation circuit 109 in the above-described order, and the modulation circuit 109 performs digital modulation such as BPM (Bi, Phase, Modulation) and then outputs the data through the terminal 111. The digitally modulated audio signal output from the terminal 111 is supplied to the adding circuit 33 as described above.

Next, the operation during reproduction will be described. The digital modulation signal from the terminal 112 via the gate circuit 28 is demodulated by the digital demodulator 113 and supplied to the RAM 115. R in RAM115
Signal processing that is the exact opposite of AM107 is performed. That is, the array is changed based on the address data obtained from the address controller 114 and further on the synchronization data, and the ECC 116 corrects the error. Along with this, the obtained data of the D1 column and the D2 column are output from the RAM 115 and supplied to the D / A (digital-analog converter) 117 and the data reading circuit 118.

The D / A 117 restores the original analog audio signal and outputs it from the terminal 36 in FIG. On the other hand, the data reading circuit 118 picks up the above ID data and
It is supplied to the D detection circuit 52. It is assumed that the operations of the respective parts of the signal processing circuit shown in FIG. 8 are all synchronized by a timing signal generated by the timing controller 110.

In the ID detection circuit 52, the first data is searched for the ID data.
Information as shown in Tables and Tables 2 is supplied to the system controller 25. Of course, the above-mentioned track pitch information is also supplied to the system controller 25 at least once per second. The system controller 25 controls the area designating circuit 26 and the capstan control circuit 20 according to these data.
For example, when the SP supplies the data corresponding to the information that the designated area is recorded in the LP at the time of reproduction by the SP, the capstan control circuit 20 is caused to halve the rotation speed of the capstan.

Further, for example, if the ID detection circuit 52 supplies information indicating that the part corresponds to a silent part by the above-mentioned search reproduction, the capstan control circuit 20 is caused to stop the tape.

In the above embodiment, the tape recorder in which six areas are formed in the longitudinal direction of the tape and the recording tracks are sequentially formed in each area has been described, but the scope of application of the present invention is not limited to this. Conventionally known VTR, DA
It is also applicable to T etc.

<Explanation of Effect> As described above, according to the present invention, the sub information signal is surely reproduced by running the tape at a predetermined running speed according to the recording position of the distributed recorded sub information signal. It is possible to provide a rotary head type reproducing device capable of performing the above.

[Brief description of drawings]

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 recorder shown in FIG. FIG. 4 is a timing chart showing the recording / reproducing timing of the tape recorder, FIG. 4 is a diagram showing a schematic configuration of a tape recorder as one embodiment of the present invention, and 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 reproduction output of each track, and FIG. 7 is a view showing the relationship between the ideal head trace locus and the recording track. 4 is a diagram showing an example of a concrete circuit configuration of the ATF circuit in FIG. 4, and FIG. 9 is a diagram showing a concrete example of a PCM audio signal processing circuit in FIG. 1 is a magnetic tape as a recording medium, 3 and 4 are rotary heads respectively, 20 is a capstan control circuit, 24 is an operating section, 25 is a system controller, 30 is a PCM audio signal processing circuit, 3
2 is a pilot signal generation circuit, 37 is an ATF circuit, 51 is an ID control circuit, 52 is an ID detection circuit, 89 is a sample hold circuit, 96
Is a comparison circuit, and A, B, and C are timings for tracing ID data.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hirohisa Takahashi, 770 Shimonoge, Takano-ku, Kawasaki City, within the Tamagawa Plant, Canon Inc. (72) Kenichi Nagasawa, 770, Shimononoge, Takatsu-ku, Kawasaki City, within the Tamagawa Plant, Canon Inc. (56) ) Reference JP-A-58-130681 (JP, A) JP-A-59-43682 (JP, A) JP-A-59-132450 (JP, A)

Claims (1)

(57) [Claims] 1. A main information signal and a tracking control signal are recorded in a track shape, sub information signals for high speed reproduction are recorded at a plurality of predetermined positions of each track, and a large number of the tracks are arranged in parallel. A device for reproducing each of the signals from a formed recording medium by a rotary head, the sampling means sampling the tracking control signal at a timing at which the rotary head scans a position where the plurality of sub information signals are recorded. Tracking control means for performing tracking control using the tracking control signal obtained from the sampling means, a traveling speed of the recording medium which is higher than a traveling speed at the time of recording, and the predetermined sampling timing. The driving speed is such that all the sub-information signals in Rotary head type reproducing apparatus characterized by comprising a means for constant.