JPS59168961A - Recording and reproducing method of positioning signal in rotary head type recording and reproducing device - Google Patents

Abstract

PURPOSE:To detect positioning well only with rotary heads in a recording and reproducing device of a PCM signal by making the frequency of a positioning pilot signal in a recording position, which should be positioned at a reproducing time, different from that in other parts at a recording time. CONSTITUTION:The device is set to the quick traversing or rewinding reproducing mode simultaneously with turning-on of a positioning switch. At this time, a pilot signal P1 or P2 taken out from a tape is supplied to a low pass filter 41 and is extracted and is supplied to a detecting circuit 42, and the change from the signal P1 to the signal P2 having a frequency f2 is detected. Consequently, a detection signal SD of the signal P2 is obtained from this detecting circuit 42 when the position of the signal P2 recorded between musics at a recording time is detected; and if the signal SD has a prescribed level or higher, a detection output signal is led out to an output terminal 44, and the tape is set to the normal reproducing mode from the quick traversing or rewinding mode in the position to be positioned by the output signal. Thus, positioning is performed only with rotary heads.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention converts, for example, a video signal or an audio signal into a PCM signal, and records the signal as one diagonal track on a tape by a rotating head in units of time. In particular, it relates to a method of recording and reproducing a cue signal to automatically detect a predetermined signal position part of a recorded video signal or audio signal, such as the beginning of a program or the beginning of a song. .

BACKGROUND TECHNOLOGY AND PROBLEMS A helical scan type rotary head device records video and audio signals on a magnetic tape once per unit time.
When recording by forming diagonal tracks one by one and reproducing them, it has been considered to record and reproduce video signals and audio signals by converting them into PCM. This is because PCM enables high-quality recording and reproduction, and the rotary head method facilitates high-density recording.

Even in such a PCM signal recording/reproducing apparatus, it would be convenient if there was a cueing function for finding a desired recording information position by performing fast forwarding or rewinding.

In the case of a method that uses only a rotating head for cueing and does not use a fixed head, this cueing signal is inserted and recorded in the PCM data, and it is used from the data during playback. One possible method is to pick it up and detect the knockout. However, when fast-forwarding or rewinding with a rotating head, the head scans across multiple tracks and the PCM signal is recorded at high density, so it is difficult to read the reproduced data sufficiently from spacing loss and signal loss. This makes it difficult to detect the cue position, and it becomes virtually impossible to detect the cue position.

OBJECTS OF THE INVENTION The present invention provides a method in which a PCM signal recording and reproducing apparatus using a rotary head as described above is capable of performing successful hitting detection using only a rotary head.

Summary of the invention PCM signals can easily be compressed and expanded on the time axis.

Therefore, unlike analog signals, it is not necessary to record and reproduce signals in a continuous manner. Therefore, it is possible to easily record this PCM signal and a separate signal by dividing the area into one track.

The present invention takes advantage of this, records a pilot signal for cueing as the separate signal, and devises the manner in which the pilot signal is recorded.

That is, in the present invention, during recording, the frequency of the pilot signal for cuing is made different from that of other parts at a predetermined recording position where cueing is to be performed during playback, and during playback, the frequency of the pilot signal for cuing is made different from that of other parts. The cue position is detected by detecting the difference in signal frequencies.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

The example shown below is for a case where there are two rotating magnetic heads,
This is the case when the following rotary head device is used.

First, to explain this rotating magnetic head device, as shown in FIG.
are arranged at equal angular intervals, that is, angular intervals of 180 degrees. On the other hand, the magnetic tape (2) is connected to the tape guide drum (3).
is wrapped over a narrower angular range, for example 90 degrees, than its 180 degree angular range.

Then, the rotating heads (IA) and (IB) rotate at 3 times per second.
The tape (2) is rotated in the direction of the arrow (5n) at a rate of 0 rotations, and is also run at a predetermined speed in the direction shown by the arrow (5), and is magnetically generated by the rotating heads (1^) and (1B). On the tape (2), diagonal magnetic tracks (4^) (4B) as shown in FIG. 2 are formed, for example, in a so-called overwritten state. That is, the head gap width (scanning width) W is made larger than the track width.

In this case, the width directions of the gaps between the heads (IA) and (IB>) are set to be different from each other with respect to the direction orthogonal to the scanning direction. That is, the so-called azimuth angles are set to be different.

According to the above rotary head device, two rotary heads (I
A) There is a period (in this example, a period corresponding to an angular range of 90 degrees) in which the (IB) and the tape (2) are not in contact with each other, and this period is used to record redundant data. If correction processing or the like is performed during addition or reproduction, the apparatus can be simplified.

In this case, each track (4
^) (4B> is divided into a recording area Ap for the PCM signal and a recording area A for the cue signal shown with diagonal lines.In this invention, the recording area AT for the cue signal is A pilot signal for cueing is recorded, and at the time of playback, the frequency of this pilot signal is changed from that of other parts at the recording position where the cue is to be found.

The following example is when recording an audio signal using PCM, and the pilot signal for cueing is recorded at a different frequency from the other parts at the beginning or end of the song to be cued, or between songs. It is something.

FIGS. 3 to 7 are diagrams for explaining an example thereof.

That is, FIG. 3 is an example of the recording thread, in which the audio signal SA is passed through the input terminal (11) to the ^/D converter (
12) and converted into a digital PCM signal. This digital signal is supplied to a recording encoder (13).

In this recording encoder (13), a signal to be recorded as one track (referred to as a signal for 1 segment)
, that is, in this example, the rotating head (1^) (IB
), the digital audio signal for each half-axis period is time-compressed to a period slightly shorter than the tape contact period of each head, and error correction codes are generated and added, interleaving processing, etc. . This recording encoder (13
) is supplied to a recording processor (14), where a block synchronization signal, address data, etc. are added to each block of a plurality of words, and the output signal is modulated into a signal suitable for recording and reproduction. The PCM signal from this recording processor (14) is passed through a switch circuit (15) for switching between recording areas Ap and A to a switch circuit (v) for switching heads.
pI (16). This switch circuit (16)
and (15) are switched by the switching signal S1 (FIG. 4A) and switching signal 32 (FIG. 4C) from the timing signal generating circuit (18). In this case, the output signal of the timing signal generation circuit (18) is synchronized with a signal indicating the rotational phase of the rotary heads (IA) and (IB). That is, in this example, the rotational phase of the rotary head (IA) (1B) obtained in synchronization with the rotation of the rotational drive motor (6) of the head (1^) (IB) from the pulse generator (7) 30H from 30■2 pulse PC and timing signal generation circuit (18) indicating
The pulse CT of z is supplied to the phase servo circuit II (19), and the rotational phase of the motor (6) is controlled by its servo output. In addition, this timing signal generation circuit (18
) is supplied to the fixed head (8) and recorded as a track (4C) at the end of the tape (2) in the width direction (see FIG. 2).

Therefore, the switching signals S1 and S2 are applied to the rotating head (IA
) (IB), and as shown in FIG. 4B, the head (1^) comes into contact with the tape (2) within a half-rotation period tA of the head during which the signal S1 is at a high level, and the signal S1 is at a high level. The head (IB) is in contact with the tape (2) during the half-rotation period IB when S1 is at a low level, and the signal S2 is at a high level for a short period τ at the beginning of each contact period. It will be done like this. Then, the switch circuit (16) is switched to the state shown in the diagram during the period tA and to the state opposite to the state shown in the diagram during the period tB by the switching signal S1, thereby performing head switching. Further, the switch circuit (15) is switched by the switching signal S2 to the state shown in the figure when the signal S2 is at a low level, and to the state opposite to the state shown in the figure when it is at a high level. Therefore, except for the period τ at the beginning of the contact period of the heads (IA) and (IB) within the periods tA and tR, the switch circuit (15
) can be switched to the state shown in the figure, so the switch circuit (1
6), one segment of audio PCM signal from the recording processor (14) is supplied to the head (1^) through the amplifier (17^) during period tA, and is supplied through the amplifier (17B>) during period tR. Head (IB
) and are recorded in the recording area Ap of each track (48) and track (4B) (4th
(See Figure E).

Then, during the initial period τ of the contact period of each head (IA) and (IB), the switch circuit (15) is switched to a state opposite to the state shown in the figure. At this time, the signal from the switch circuit (24) is supplied to the switch circuit (16) through this switch circuit (15).

One input terminal of this switch circuit (24) is supplied with a signal from the switch circuit (23), and the other input terminal is supplied with a signal E for erasing a pilot signal, which will be described later, from an oscillator (22). and timing signal generation circuit (18)
It is selectively switched by a switching signal S3 from . On the other hand, the switch circuit (23) receives the pilot signal P1 from the oscillator (2b) with the oscillation frequency f1 and the pilot signal P1 with the oscillation frequency f2.
A pilot signal P2 from an oscillator (212) is supplied, and selectively switched by a switching signal S3 from a timing signal generation circuit (18).

When the cue switch (26) from the switching signal forming circuit (25) is pressed and turned on, this switch circuit (23) receives a signal that goes high for a certain period of time T from the time it is turned on. That high level period T
Only the switch (
26) is not turned on, the state is switched to the state shown in the figure.

Pilot signals P1 and P2 have their frequencies f1 and f
2 is a value with relatively little spacing loss, for example 100
kHz to 300! 1x, and is recorded at a relatively high level. Also, fl:f2=
Frequencies f1 and f2 are selected to a certain extent, such as l:3.

The erasing signal E is later recorded on the already recorded tape.
This is used because when making a new recording that overlaps the previous recorded information, the recorded track does not always match the previous recorded track, so it is necessary to erase the previously recorded pilot signal. , the frequency f3 is set to a value that is sufficiently distant from the frequencies r1 and f2 for practical purposes and is set to a value that can eliminate the pilot signals P1 and P2, for example, 500 kHz. Further, the recording level is also set to a level that can practically erase the bit signals P1 and P2.

The switching signal S3 of the switch circuit (24) is applied to the heads (IA) and (IB) within the periods tA and tR as shown in the fourth diagram.
) is a signal that becomes high level only within the initial period τ of the contact period of Can be switched. In this case, in this example, the high level period of the signal S3 is set to be approximately at the center of the period τ.

Therefore, when the switch (26) is not turned on, during the period approximately in the middle of the period τ within the periods tA and tR,
The pilot signal P1 from the oscillator (2h) is sent to the head (
1^), one track at a time (
4A) is recorded at the center position (shown with diagonal lines in the figure) of the recording area AT of (4B).

In addition, since the switch circuit (24) is in the state shown in FIG. 9 in periods other than the period approximately in the middle of the period τ between the periods tA and tR, the erasing signal E from the oscillator (22) is
are recorded by the heads (IA) (IB) before and after the pilot signal recording position in the recording area AT of the track (4^) (4B) as shown in FIG. 5 (see FIG. 4E).

When the switch (26) is turned on at the beginning of the song you want to cue during playback or between the beginning of that song and the end of the previous song, the switch circuit (26) ) is switched to the oscillator (212) side, and the pilot signal at this time T is recorded as signal P2 instead of signal P1 in other periods. The length of the certain time T is determined according to the tape speed during high-speed tape feeding during playback. In other words, the rotating head (IA
) is at the position shown by the arrow (9) in Figure 2. For example, if the tape speed is 200 times the normal speed, the head track IB) is at the position shown by the arrow (9) in Figure 2. A position 100 lines away from this will be scanned in parallel. Therefore, in order to be able to locate the beginning of the tape during high-speed feeding, for example, in the case of 200 times the normal speed mentioned above, it is necessary to
It is necessary to record signal P2 as the pilot signal of A7. By the way, the normal tape speed is 6 m/s
ec, head rotation speed 30Hz=180Orp
In order to be able to cue even at 200 times the speed, the switch circuit (23) should be switched to the oscillator (212) side for a period of approximately T = 1.6 seconds or more.

Note that even if the tape speed changes greatly in this way, since the head rotating at high speed scans and reproduces the track, the relative speed between the tape and the head will hardly change, and the frequencies f1 and f2 will change. pilot signal P
The frequency of the reproduced signals of 1 and P2 is approximately f even during high-speed feed.
There is almost no change in l and f2.

Next, reproduction of the signal recorded as described above will be explained.

Figure 6 shows an example of the regeneration system, and the motor (6) has 4 markings. Drum phase servo is applied in the same way as during recording.

That is, in the reproduction system shown in FIG. 6, a 30Hz pulse is reproduced from the track (4C) of the tape (2) by the head (8), and this pulse is supplied to the servo circuit (19) and the pulse generator (7). ) is supplied to the servo circuit (19), and the pulse PG from the head (IA) is supplied to the servo circuit (19).
(IB) is track (4^) (4B) in the same relationship as when recording.
) is servo controlled to scan. Therefore, reproduced signals can be obtained from the heads (IA) and (IB) in the same manner as in the case shown in FIG. 4E.

Further, pulses from the head (8) are supplied to a control signal generation circuit (18).

The signals extracted from the tape (2) by the rotating heads (1^) and (IB) are sent to the head amplifiers (31A) and (3).
1B) to the switch circuit (32). This switch circuit (32) is connected to the timing signal generation circuit (1).
The 30Hz switching signal Sw from 8) alternates between a half-rotation period including the tape contact period of the head (1^) and a half-rotation period including the tape contact period of the head (IB), as in recording. Can be switched.

Therefore, from this switch circuit (32),
An intermittent PCM signal of one segment at a time is obtained, which is supplied to a reproduction processor (33), demodulated to the original PCM signal, and this is supplied to a decoder (34). This decoder (34) detects data for each block based on the block synchronization signal, and performs processing such as error correction and de-interleaving. The PCM signal from this decoder (34) is transferred to the D/A converter (35).
), where it is converted back into an analog audio signal and delivered to an output terminal (36).

The cueing to find the starting position of the song during playback is performed as follows.

That is, although not shown, at the time of cueing, for example, a cueing switch for generating a cueing command signal is turned on, and the apparatus is placed in fast-forward playback or rewind playback mode. At this time, since the pilot signals P1 and P2 have low frequencies, there is little spacing loss.
In addition, it plays well with little azimuth loss, and even when the playback tape speed becomes high, as mentioned above,
The reproduced signal frequencies are also approximately fl and f2.

The pilot signal P1 or P2 in the signal extracted from the tape by the heads (IA) and (IB) obtained from the switch circuit (32) is supplied to the low-pass filter (41) and extracted (Fig. 7A). , the extracted pilot signals P1 and P2 are supplied to a detection circuit (42). This detection circuit (42) has a passing center frequency f2, for example.
It is composed of a bandpass filter or a frequency demodulator that demodulates a signal of frequency f2, and detects when the reproduced signal of the pilot signal changes from signal P1 to signal P2 of frequency f2. Therefore, from this detection circuit (42), at the time of recording, when the position of the pilot signal P2 of frequency f2 recorded between songs or at the beginning of the song is reached, the detection signal SD of this pilot signal P2 is detected. (Figure 7B) is obtained. This detection signal SD
is supplied to a comparison circuit (43) for removing the influence of noise, and when the signal SD7 6 is above a predetermined level, a detection output signal is derived to the output terminal (44).

The output signal obtained at the output end (44) causes the tape to change from the fast-forward or rewind state to the normal play state from the position to be cued. Alternatively, the tape is stopped at the cue position.

In this case, the detection output of the detection circuit (42) may be counted by a counter, and when the count position is greater than a predetermined value, the same cueing operation as described above may be performed.

Note that, in practice, during the cueing operation, the tape moves at a much faster speed than the normal speed, so there is a risk that playback may start at a point beyond the position to be cued. To prevent this, for example, playback may be started from a position where the tape is moved back a predetermined amount in the opposite direction from the detected position.

Note that when the cue switch is not turned on during cueing, that is, during playback, the output signal obtained at the terminal (44) is cut off to the motor drive system, so that cueing does not work. .

In the above example, a fixed control signal head (8) is provided in addition to the rotary heads (IA) (IB) for tracking control during playback, but the pilot signal for cueing is used for tracking control. This fixed head can also be omitted by using it for other purposes.

In this case, the frequency of the pilot signal P is selected to be a frequency that causes not only spacing loss but also azimuth loss. The aforementioned frequency of 100 to 300 KHz corresponds to this.

An example of that case will be described below.

The configuration of the recording system in this example is the same as that shown in FIG. It is designed to record a pilot signal P, and the recording position of the pilot signal P is as shown in FIG.
The tracks (4A) and (4B) are made so that they do not overlap each other when viewed from a direction perpendicular to the longitudinal direction. As a technique for this purpose, a technique can be applied in which, in a VTR, the recording position of the horizontal synchronizing signal of the video signal is aligned in a direction perpendicular to the longitudinal direction of the track.

For example, when the track pitch is tp and the track inclination angle is θ, the distance in the scanning direction of the head between the recording positions of pilot signals of adjacent tracks is β1n.In this case, when recording a plurality of pilot signals as in the 8th WJ, , the distance 12 in the scanning direction of the head between the recording positions of the pilot signals on each track is 12
=3141.

In the case of this example as well, during recording, the pilot signal P2 is recorded instead of the pilot signal P1 between the songs to be cued during playback, or for a certain period of time T at the beginning of the song.

Furthermore, since this example does not have a fixed head (8), naturally the control signal track (4C) shown in FIG. 2 is not formed.

9 An example of the reproduction system in this case is shown in FIG.

In this example, a 30Hz signal from the timing signal generation circuit (18) and a pulse PC from the pulse generator (7)
The output signal of the timing signal generation circuit (18) is supplied to the head (1^) and the motor (6) is controlled by its servo output.
Although it is made to have a certain relationship with the rotational phase of (IB), this relationship does not allow the head (IA) (IB) to correctly scan the track (4^) (4B) as it is.

As is clear from FIG. 9, the configuration for demodulating the PCM reconnaissance signal to the original analog audio signal and cueing is exactly the same as in the case of FIG. 6 described above.

Tracking control is performed as follows.

For example, if the head (IA) scans a range of scanning width W including the track (4A) as shown in FIG.
The head (l^) scans across the tracks (4B) on both sides of this track (4^) (4B), and in the area AT, in addition to the pilot signal P1 or P2 from the track (4A), Trunk (4B)
The crosstalk component of the pilot signal P1 or P2 from (4B) is extracted as a reproduction output.

In this way, the head output obtained in the switch circuit (32) is transferred to a bandpass filter (51) that passes only the pilot signals P1 and P2 of frequencies f1 and f2.
(which may be a low-pass filter), only pilot signals P1 and P2 are taken out, which are supplied to a detection circuit (52) and detected, and the detection output is supplied to sampling and hold circuits (53A) and (53B). be done.

As the pilot signal detection output obtained from this detection circuit (52), as shown in FIG. 10A, the pilot signal output PM from the center track has a high level;
The pilot signal output PR, which is crosstalk from the right track, and the pilot signal output PL, which is crosstalk from the left track, appear at low levels. The order in which the outputs PM+PR+PL2 appear is always the same when each track of the rotary head (1^) (1B) is scanned.

Then, the timing signal generating circuit (18) generates the sampling pulse SPI (the sampling pulse SPI) at the time when the head (1^) scans the pilot signal recording portion of the track (411) on the right side of the ζ track (4A) in FIG. Figure 10B
) is obtained, and a sampling pulse SP2 (C in the same figure) is obtained at the time when the head (IA) scans the pilot signal recording portion of the track (4B) on the left side of the track (4^) in FIG.

These sampling pulses SP1 and SF3 are applied to sampling hold circuits (53A) and (53A), respectively.
3B). Therefore, the sample and hold output ST1 of the pilot signal reproduction output PR from the right track is output from the sampling and hold circuit (53^).
A sample and hold output ST2 of the pilot signal reproduction output pL from the left track is obtained from the sampling and hold circuit (53B). Both sample and hold outputs are used as a differential amplifier (5
4) is supplied to one and the other input terminals. Therefore, the differential amplifier (54) obtains the difference in power between the two people, and this is supplied to the capstan motor (not shown) to change the tape transport amount until the level difference between the outputs PFL and PL is zero.
That is, when the head (IA) scans the center track, it is controlled so that it spans both tracks by the same amount.

When the head (IB) scans the track (4B), tracking is controlled in exactly the same manner.

In addition, as it is, the head (1^) is exactly on the ζ track (
4B), and the head (IB) is exactly on the track (4^
), it will not be possible to detect this mistracking situation. To prevent this,
Even if the head (1^) is not in a state of just tracking in advance, the head (1^) tracks most of the track (4A).
B) may be set in such a state that most of the track (4B) is scanned.

Therefore, one method is to monitor the output level of high-frequency signals, which are the playback outputs of two heads (1^) (1B) with different azimuth angles, at the start of playback and prior to actual playback. It is. In other words, the high frequency output level when one head scans a track with a specific azimuth and the frequency output level when the other head scans a track with the same azimuth are compared, and each head The azimuth track is scanned to the corresponding one.

Another method is to constantly monitor the high frequency output from each head during playback, and when the high frequency output level falls below a predetermined level (at this time, the heads are scanning tracks with different azimuths), the above example By adding an error voltage to the tracking signal obtained by the above method, the tracking position is shifted by a maximum of one track pitch.

As described above, in this example, the pilot signal for cueing is also used for tracking control, so that recording and playback and cueing can be performed using only the rotating head without using a fixed head, and 5 4 tracking. A device that performs all controls can be realized.

Note that the above example describes a case where the area A is provided only at one end in the longitudinal direction of one track, but the area AT is not limited to this, and the area AT may be provided at both ends of the track. As shown in FIG. 11, the recording area for the PCM signal is divided into two, API and AP2, and the recording area for the pilot signal for cueing is at both ends of the track AT1. A
It is also possible to use three regions: Ti and Ays at the center of the track.

The arrangement shown in FIG. 11 has the advantage that when the pilot signal is also used for tracking, good tracking can be achieved even if the recording track is curved.

In the above example, the position to change the frequency of the pilot signal to be recorded for cueing was set using a manual switch, but for example, if the recording signal is an audio signal, the no-signal period between songs can be set using a manual switch. It is also possible to detect this and change the frequency of the pilot signal by a period T based on the detection output.

In addition, in the above example, the frequency of the pilot signal was changed from fl to f2 in the no-signal portion between songs and at the beginning of the song, but a pilot signal with another frequency f4 was recorded at the end of the song. It is also possible to stop the tape when this is detected during playback. Furthermore, by changing the frequency of the pilot signal at the end of the tape to a specific frequency, the end of the tape can be detected during playback.

Furthermore, by making the frequencies of the biloft signal between songs and the pilot signal at the beginning of a song different from each other, the two can be discriminated.

Furthermore, in the above example, the timing signal generation circuit (18
) is supplied with the pulse PC from the pulse generator (7) as a signal indicating the rotational phase of the rotating heads (l^) and (IB); ), for example, before recording or playback, the rotary head (1^) and (IB
) records a predetermined signal, plays it back, and detects its envelope to detect the beginning of the tape contact of the head (18) or (IB), and uses that detection signal. You can also. Further, in the case of the examples shown in FIGS. 8 to 10, the sampling pulses SPs to SP2 may be formed using the reproduced output timing of the pilot signal of the track to be scanned.

Moreover, although the above example is a case where there are two rotating heads, in the present invention, the number of rotating heads may be one or two or more.

In addition, the above example uses a special rotary head device that records and plays back by winding the tape over an angular range narrower than the head angular interval, but as usual, the angular range that is the same as the head angular interval is used. Of course, the present invention can also be applied to the case where a rotary head device for winding a tape is used.

Effect of the invention As described above, according to the present invention, it is possible to rotate 7 It is possible to cue well by using only the cursor.

In the present invention, the pilot signal for cueing is recorded as a predetermined frequency signal in the same trunk as the PCM signal but in a different area, so this pilot signal can be easily detected during playback. In addition, detection of the starting position can be easily done by changing the frequency of the viroft signal at the starting position from that of other parts, and detecting the difference in the frequency of this pilot signal during playback. It also has the effect of making it easier.

In addition, since detection is performed using a rotating head, the reproduction frequency of the pilot signal is almost the same as the normal speed (during recording) even when the tape is fed at high speed, which simplifies the configuration for detecting the pilot signal.

In addition, since the pilot signal is recorded in a separate area from the PCM signal, there is a large degree of freedom in the pilot signal frequency, and when new recording information is to be recorded over the previous recording information at a later point in time, it is possible to record it before it. The frequency can be set to a frequency from which it is easy to cancel the pilot signal that was present.

9 8

[Brief explanation of drawings]

FIG. 1 is a diagram showing an example of a rotary head device used in an apparatus for explaining the invention in detail, FIG. 2 is a diagram showing an example of its recording track pattern, and FIG. 3 is a diagram showing a detailed explanation of the invention. Fig. 4 and Fig. 5 are diagrams for explaining an example of the recording system of the device, Fig. 6 is a system diagram of an example of the reproducing system of the device, and Fig. 7 is for explanation. , FIG. 8 is a diagram showing the main part of a recording track pattern by an apparatus for explaining the invention in detail, FIG. 9 is a system diagram of an example of the reproduction system of the apparatus, and FIG. 10 is a diagram for explaining the invention. FIG. 11 is a diagram showing an example of a recording track pattern according to still another example of the present invention. (IA) (IB) is a rotating head, (2) is a tape,
(48) (4B) is the recording track, Ap is the recording area for the PCM signal, AT is the recording area for the cue signal, P is the pyro zero (r:l: AQ low

Claims (1)

[Claims] In an apparatus that converts a signal to be recorded into PCM, records the PCM signal by sequentially forming diagonal tracks on a recording medium using a rotary head, and reproduces the PCM signal, the PCM signal is converted into PCM on a part of each track. A cue signal recording area is set separately from the signal recording area, and a signal with a frequency outside the frequency range of the PCM signal is used as a cue signal to set a predetermined cue position in this cue signal recording area. A cueing signal in a rotary head type recording and reproducing apparatus that records data at different frequencies and, when reproducing, detects the difference in frequency of a signal with a frequency outside the frequency range of the PCM signal to cue the cue. Recording and playback method.