JPH0566667B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a two-head helical scan type information recording and reproducing device, and more particularly to a magnetic recording and reproducing device suitable for recording and reproducing a time-compressed audio signal. .

[Background of the invention]

Figure 1 shows the tape pattern of a conventional example of a two-head helical scan type information recording and reproducing device.
There are home video tape recorders typified by the VHS system and home video tape recorders known as the 8mm video standard, the tape pattern of which is shown in Figure 2.

In FIG. 1, 1 is a video tape, 2 is a video track on which video signals are recorded, 3 is a control track on which control signals are recorded,
4 is an audio track on which audio signals are recorded; 5 is an arrow indicating the direction in which the rotating head traces; and 6 is an arrow indicating the direction in which the video tape runs.

In FIG. 1, θ ₁ , θ ₂ , and θ ₃ indicate the winding angles of the video tape wound around the rotary cylinder, respectively, and θ ₁ ≒θ ₃ ≒5° and θ ₂ ≒180°. θ ₂ corresponds to the period during which the video signal is recorded, and θ ₁ and θ ₃ are margins for ensuring compatibility.

In FIG. 2, 7 is a track on which the audio signal is converted into a PCM signal and the signal is compressed to approximately one-sixth of the time, 8 is the first option track, and 9 is the second option track. .

In Fig. 2, θ ₁ , θ ₂ , θ ₃ , and θ ₄ indicate the winding angles of the video tape wound around the rotating cylinder, respectively; θ ₁ ≒ θ ₅ ≒ 5°, θ ₂ ≒180°, θ ₄ =30°
It is. θ ₄ corresponds to the period during which the audio signal is recorded,
θ ₁ , θ ₂ and θ ₃ are the same as in FIG.

As described above, in the past, it was only possible to record one or two types of information on one diagonal track, which limited the scope of use of video tapes.

[Purpose of the invention]

The purpose of the present invention is to eliminate the drawbacks of the conventional magnetic tape, and to make it possible to selectively reproduce desired tracks divided in the width direction from a magnetic tape in which multiple types of information are recorded on a single diagonal track, with a simple configuration. west,
An object of the present invention is to provide a magnetic recording and reproducing device that expands the range of use of magnetic tape.

[Summary of the invention]

In the present invention, as shown in FIG. 3, one diagonal track is divided into N pieces of information (7 pieces of information A to G in FIG. 3), and N pieces of information are independently recorded and reproduced.

In order to record and reproduce each track independently, the pilot signal is multiplexed with the information, and at the time of recording, the signal created by dividing the frequency of the crystal oscillator output and the rotation speed of the rotary head are synchronized in phase. Further, by operating a tracking circuit using a pilot signal for a period corresponding to the desired track divided in the width direction of the magnetic tape, the desired divided track is selectively reproduced.

[Embodiments of the invention]

FIG. 3 is a tape pattern diagram showing an example of the case where the present invention is applied to a video tape recorder of 8 mm video standard. In other words, one diagonal track is 10
It is divided into 7 information tracks, 16 to 16, and 7 information tracks A to G are provided. In the tape pattern shown in Figure 3, the tape is wound around the rotating cylinder at 220 degrees, with tracks A and G winding at 35 degrees, and tracks B, C, D, E, and F at 30 degrees.

FIG. 4 is an embodiment of a block diagram showing the essential parts of the magnetic recording/reproducing apparatus of the present invention which records both the tape pattern of FIG. 2 and the tape pattern of FIG. 3. FIG. 5 is a waveform diagram of each part of FIG. 4.

The operation in FIG. 4 will be explained below using FIGS. 3, 4, and 5.

First, the case of recording the tape pattern shown in FIG. 2 will be described. This corresponds to recording a signal obtained by converting an audio signal into a PCM signal and compressing the time on track A in FIG. 3, and recording a video signal on tracks B, C, D, E, F, and G.

In FIG. 4, 17 is a video signal input terminal, and 18 is a video signal recording processing circuit.
At 18, the chroma signal in the video signal is frequency-converted to a low frequency band, and the luminance signal is converted to an FM signal.
19 is an arrow indicating the running direction of the tape. 20
is a write amplifier whose output signals are recorded on the tape 1 by rotary heads 23a and 23b.

22a and 22b are two-channel on-signal input terminals, and 21 is an audio signal recording processing circuit. At 21, the audio signal is converted into a PCM signal and further time-compressed to about 1/6.

28 is a pilot signal generator which outputs signals of four different frequencies. That is, every time the output (I) of the pulse generator 27 switches between High and Low,
Pilot signals are output in the following order: ₁ → ₂ → ₃ → ₄ → ₁ → ₂ ... 27 output signal High,
Low is associated with the rotary heads 23a and 23b, and in FIG. 4, when 23a is recording tracks B to F, the output signal (I) of 27 is High.
So, when 23b is recording tracks B to F,
The output signal (I) of No. 27 becomes Low. The output signal of the pilot signal generator 28 is the (I) signal.
It is associated with High and Low, and the (I) signal is
₁ or ₃ when high, ₂ when (I) signal is low
It becomes ₄ .

An example of a pilot signal is ₁ ≒ 6.5h, ₂
≒7.5h, ₃ ≒10.5h, ₄ ≒9.5h, (h: horizontal synchronization frequency).

Therefore, a signal obtained by mixing the three output signals of the output signal of the circuit 18, the output signal of the circuit 21, and the output signal of the circuit 28 is applied to the rotary heads 23a and 23b.

Next, phase synchronization of the cylinder motor 26 will be explained using FIG. 5. When recording a video signal, in order to prevent switching noise from appearing on both sides, the recording position of the vertical synchronization signal is set at a predetermined position at the bottom edge of the tape (in Figure 3, b and c, h and i, n and o).
border).

Therefore, the vertical synchronization signal is extracted from the video signal by the synchronization separation circuit 32 to produce the waveform shown in FIG. 5J.
24a and 24b are two magnets attached to the rotating cylinder, and the pick up head 2
From 5, a pulse like H is obtained. In Figs. 4 and 5, a positive pulse is sent from the magnet 24a, which is attached slightly ahead of the head of 23a, to the head of 23b.
A negative pulse is emitted from a magnet 24b mounted slightly ahead of the head.

The output signal (H) from the pick-up head 25 passes through a pulse processing circuit 27 consisting of a delay circuit, a waveform shaping circuit, etc., and has a waveform of (I ₀ ). Although (I ₀ ) is not shown in FIG. 5, it has the same frequency as the shown (I) signal, but has a different phase. The monomulti 33 converts the vertical synchronization signal into a frame pulse. In this case, the switch 31 is connected to N, and the phase shift error signals of (J) and (I ₀ ) are obtained at the output of the phase comparator 30, which is amplified by the motor driver 29 and drives the cylinder motor 26. . Therefore, the timings of the (I) signal and the (J) signal are synchronized in phase with the rising edge of the (I) signal slightly ahead of that of the (J) signal, as shown in FIG.

Next, control of the capstan motor 45 will be described. A so-called quartz lock method is used to keep the tape feed speed at a predetermined value. That is, a signal obtained by dividing the output signal of a rotational speed signal generator consisting of a pick-up head 47 from an FG 46 attached to a capstan motor 45 to 1/N ₅ by a frequency divider 42 and a signal obtained by dividing the frequency of the crystal generator 39 by a frequency divider 47. A phase comparator 43 compares the phases of the signals whose frequency is divided by 40 and 41 to 1/N ₁ ×1/N ₄ . A phase error signal which is an output signal of 43 is amplified by a motor driver 44 and drives a capstan motor.

Next, a case will be described in which a time-compressed audio signal is recorded only on the A track.

In FIG. 4, the switch 31 is connected to the A side.

Q in FIG. 5 indicates the time axis. That is, the head 23a traces tracks A to F in FIG. 3 while time passes in the order of a→b→c→d→e→f→g. When the head 23b reaches the middle of the A track, the head 23b starts tracing the A track.

In Fig. 5, at times g, h, and i, head 2
Both 3a and 23b will trace the tape. Similarly, both heads a, b, c and m, n, o trace the tape.

The pilot signal generator 28 in FIG. 4 is preferably simple, so that if two heads write pilot signals on the tape at the same time, the same pilot signal is required.

While the head 23a is tracing the A track, the head 23b is tracing the F and G tracks. When forming the tape pattern shown in FIG. 2, when the head 23a traces tracks B to G, the pilot frequency is set to 1 or ₁ .
₃ , and when the head 23b traces the B to G tracks, the pilot frequency is set to ₂ or ₄ .

Therefore, the pilot frequency during the period when the head 23a traces the A track is ₂ or _4.
becomes. Also, in this case, it is difficult to decide on ₂ , and it may be ₂ or ₄ .

FIG. 6 is a tape pattern diagram when recording is made only on the A track. In the figure, A ₁ , A ₃ , A ₅ , and A ₇ are formed by the head 23a, and A ₂ , A ₄ , and A ₆ are formed by the head 23b.

The pilot signal recorded in _A1 will be ₂ or ₄ . In FIGS. 5 and 6, the case where the number becomes ₂ is explained. In this case, A ₂ , A ₃ , A ₄ , A ₅ ,
The pilot signals of A ₆ and A ₇ are ₃ , ₄ , ₁ , ₂ , ₃ ,
It becomes ₄ .

Next, the timing pulse K required for the above signal processing
We will explain how this occurs. In the tape pattern shown in Figure 3, the track for the wrapping angle of 180° is B.
~G is divided into 6 equal parts. The signal corresponding to this 180° wrapping angle is (I) in Fig. 5. Therefore, the timing pulse should be a signal (K) that is phase synchronized with (I) and has a frequency 12 times that of (I). Bye.

For example, when the present invention is used in an NTSC 8 mm standard video tape recorder, the cylinder motor needs to rotate at about 30 Hz. If the frequency of the crystal oscillator 39 is 3.58MHz (color subcarrier frequency), N ₁ ×N ₂ ×N ₃ ≈119448. The switch 31 is connected to the A side and the delay circuit 35
The output signal (M) and (I ₀ ) signal are phase-synchronized,
As shown in FIG. 5, (M) and (I) become signals with the same phase and frequency. Therefore, the frequency divider 34
If N ₃ =12, (K) timing pulses can be obtained.

The frequency divider 35 divides the signal (K) into 1/12, and generates a signal (L ₁ , L ₂ ) having six types of phases (0°, 30°, 60°, 90°, 120°, 150°). ,... _L6 ) is output. This L _1
-L6 is selected by the data selector 36, and when recording on the A track, _L1 is output, and when recording on the B track, _L2 is output.

The output signal Li of the data selector 36 controls the audio signal processing circuit 21 and
Generate PCM signal.

Next, the frequency division ratios N ₁ and N ₂ of the frequency dividers 40 and 38 will be explained. Since N ₃ = 12, N ₁ ×N ₂ ≒9954
becomes. To make the phase synchronization system of the capstan motor 45 simplest, N ₄ =N ₅ =1. In this case, if N ₂ =1, the output frequency of the frequency divider 41 will be approximately 360 Hz, which is a value that is easy to create as the FG 46. Therefore, N ₁ ≒9954.

Next, select B of the tape with the signal recorded on track A.
The case where another audio signal is recorded on a track will be explained. The tape pattern in this case is shown in FIG.

When recording a signal on the B track, when a control signal is applied to the channel select terminal 37, the signal _L2 in FIG. 5 appears at the output of the data selector 36. Therefore, the signal in the period ~b becomes _B1 , the signal in the period c~h becomes B2, and the signal in the period c~h becomes _B2 , and
The signal during the period becomes _B3 , forming a tape pattern as shown in FIG.

The pilot signal written in _B1 is ₁ or ₃ for the reason mentioned above, and the case where it is ₃ is shown in Figure 5.

Therefore, B ₁ has ₁ in B ₂ , B ₃ , B ₄ , B ₅ ,
₄ , ₁ , ₂ , ₃ , ₄ , _{and 1} are written in B ₆ and B ₇ , respectively.

In FIG. 7, the track trajectories of A ₁ and B ₁ are shifted by about half the track pitch.

Since the A and B tracks are recorded separately, the relative positions of A ₁ and B ₁ cannot be controlled;
In some cases, it will be as shown in Figure 7, and in other cases, A ₁ and B ₁ will be on the same straight line.

However, when playing back a tape like the one shown in FIG. 7, it is rarely necessary to play back the A track and the B track at the same time, and the deviation between _A1 and _B1 does not pose a problem.

That is, when reproducing only the A track, it is sufficient to reproduce the pilot signal and perform tracking only during the period when the heads 23a and 23b trace the A track. In this way, tracking will not be disturbed by signals written on tracks other than the A track.

After all, in order to reproduce the tape pattern shown in FIG. 7, it is necessary that a tracking control signal (ie, a pilot signal) dedicated to the A track be recorded in the A track.

In FIG. 4, the pulse processing circuit 27 outputs two pulses I and I ₀ . I and _I0 are signals having the same frequency and different phases, and the circuit 27 is adjusted so that the timing relationship between I and J is as shown in FIG.

The delay circuit 35 is provided to align the phases of _L1 and I in FIG. The pulse is slightly delayed from I.

The switch 48 is a switch for switching the control signal to the circuit 21, and when recording video and audio simultaneously, the switch is connected to the N side, and the switch 48 is connected to the
A signal is added. The circuit 21 applies signals G ₁ , A ₁ , A _{2 .} . . to the write amplifier 20 in response to the I signal.

The amplifier 20 receives a video signal (fifth
V) in the figure, a pilot signal P from the circuit 28 and a signal I from the switch 48 are applied to cause recording signal currents such as N ₁ and O ₁ to flow through the video heads 23a and 23b.

The signal waveforms when recording audio signals only on the B track are L ₂ , G ₂ , N ₂ , O ₂ , and the switch 48
is connected to the A side. The signal waveforms when recording an audio signal only on the C track are L ₃ , G ₃ , N ₃ , O ₃ , and the signal waveforms when recording an audio signal only on the A track are L ₁ , G ₁ , N ₇ , O ₇ .

The switch 48 is connected to the N side when recording a video signal, and to the A side when recording only an audio signal.

The reason why the switch 48 is necessary is to eliminate the effect of the phase error between the signals I and _L1 , and if this phase error can be suppressed sufficiently, the switch 48 is not required. In this case, the switch 48 may remain connected to the A side.

FIG. 8 shows a block diagram of an embodiment of the write amplifier 20 used in the present invention. In Figure 8,
49 is a video signal and pilot signal mixing circuit; 5
0 is a mixed circuit of PCM signal and pilot signal, 5
1 and 52 are switch circuits for signal switching, and 53 and 54 are switch circuits for squelch, and when the control terminal is low, V,
Connected to the N side (black circle side) and to the A and S sides (white circle side) when high. 55, 56 are drive amplifiers, 57
is a two-channel rotary transformer. The switch 58 is connected to the N side when recording video and audio simultaneously, and to the A side when recording only audio, and cuts off signals outside the period to be recorded when recording only audio. 59, 60, 61, and 62 are AND circuits.

FIG. 9 is a block diagram showing one embodiment of the reproducing circuit of the present invention, and FIG. 10 is a waveform diagram showing signal contents of each part in FIG. In Figure 9, 107 is
A preamplifier that takes Ni′ and Oi′ as input signals and outputs Ri and Si; 108 is a video signal reproduction processing circuit; 109
Reference numeral 110 denotes a video signal output terminal, and 110 denotes a PCM audio signal reproduction processing circuit, which receives the reproduced PCM signal Si and timing pulses I' and Li' as input signals, and outputs two channels of audio signals. 111 and 112 are output terminals for audio signals.

Reference numeral 113 denotes a linear amplifier, which amplifies the pilot signal contained in Si to the same level since the level of the pilot signal contained in Si is lower than that of the pilot signal contained in Ri for reasons described later. 114 is a switch, 115 is a BPF for pilot signal extraction, 1
16 and 117 are gate circuits, and 118 is a converter, which outputs the product of the output signals of 116 and 117. 119 is the gate circuit, 120 is the center frequency fh
is the HighQ BPF of , and 63 is the center frequency of 3fh.
HighQ BPF, 64, 65 are amplitude detectors, 66
is a differential amplifier, 67 is an inverter, 68 is a switch, 28, 118, 120, 63, 64,
65, 66, 67, and 68 constitute a four-frequency pilot type tracking error detection circuit. 69 is a sample hold circuit, and 70 is a delay circuit, which has a delay time slightly longer than 35 in FIG.

71 is an inverter, 72 is a switch, 73 is a 1/9954 frequency dividing circuit, and 74 is a 1/12 and 1/6 frequency dividing circuit, which outputs Li' and Gi'. 75 is a data selector, and 76 is a switch.

In Fig. 9, (1) playback the video signal and the A channel PCM signal simultaneously, (2) playback only the B to G channel PCM signal, (3) playback only the A channel PCM signal. There is a way to use the street. Switches 48, 72, 76, 1 in this case
The operation of 14 is shown in FIG.

In the state (1), the reproduced signals from the head become N ₁ ', O ₁ ' in FIG. 10, and the video signal R ₁ and PCM signal S ₁ appear at the output of the preamplifier 107.
The pilot signal in _R1 is extracted by the BPF 115, and tracking is controlled by the capstan motor 45. At this time, the data selector 75
The output Gi′ of is High for the entire period, and the gate 116,
117, 119 and sample hold 69 become conductive. One of the gates 116, 117, 119 and sample hold 69 is sufficient, but
The gate circuit and sample hold 69 may be used together.

In state (2), for example, during B channel reproduction, the reproduced signals from the head become N ₂ ', O ₂ ', and the output signal of the preamplifier becomes S ₂ by the switch operation shown in FIG. In the figure, N/A means N.
This means that either A is fine. In order to detect a tracking error from the pilot signal in _S2 , a signal _G2 ' is output to the data selector 75 to gate the tracking error signal.

In state (3), unlike state (2), the video head 23a reproduces the pilot signals ₂ and ₄ , and the video head 23b reproduces the pilot signals ₁ and ₃ , so the situation is the same as in (2). Tracking cannot be achieved with the configuration (see JP-A-53-116120). Therefore, the switch 76 corrects the above.

FIG. 11 is a block diagram showing another embodiment of the reproducing circuit of the present invention. The difference from FIG. 9 is that a switch 77 is provided in place of switch 76, and the operation of each switch is shown in FIG. 15.

FIG. 12 is a block diagram showing another embodiment of the reproducing circuit of the present invention. The difference from FIG. 11 is that inverter 79 and switch 7 are used instead of switch 72.
8 was established. Check the operation of each switch first.
It is shown in Figure 6.

FIG. 13 is a block diagram showing another embodiment of the reproducing circuit of the present invention. The difference from FIG. 9 is that a switch 78 and an inverter 79 are used instead of the switch 76.
The operation of each switch is controlled by the 17th switch.
As shown in the figure.

FIG. 18 is a block diagram showing an example of the preamplifier 107 used in the present invention. 80 is preamplifier
IC, 81 and 82 are input terminals for playback signals, 83 is an output terminal that outputs the video signal in normal conditions, 84 is an output terminal that outputs the PCM signal of the A channel in normal conditions,
85 is an input terminal for head switch pulses (I', Li'), 86 and 87 are head ups, 88 and 89 are switches, 90 is an inverter, and 91 and 92 are buffer amplifiers. Normally 91 amplifier gain is 92
Set it approximately _10dB larger than that of . The reason is that a PCM signal leaking into a video signal is difficult to tolerate because it causes visible interference, but there is no problem with video signals leaking into a PCM signal as long as it is below the threshold. Sometimes it is desired to extract the chroma signal or pilot signal multiplexed with the video signal at the highest possible level.

For this reason, amplifiers 113 are provided at the ninth, eleventh, twelfth, and thirteenth terminals to amplify the pilot signal from the output terminal 84.

FIG. 19 is a circuit diagram showing an embodiment of the sample and hold circuit 69 used in the present invention.

In FIG. 19, 92 is an input terminal, 93 is a terminal to which a gate pulse Gi' is applied, and 94 is an output terminal.

During the period when the terminal 93 is High, the signal at the input terminal 92 is transmitted as is to the output terminal 94, and the terminal 93 is high.
When it becomes Low, a pre-hold is performed by the function of the capacitor 95, and the tracking error voltage is held. The gate circuits 58, 59, and 61 in FIGS. 9, 11, 12, and 13 all transmit the input signal during the high period of the Gi' signal, and are cut off during the low period. There are many possible places to insert the gate circuit, but considering the DC offset, BPF62,6 is possible.
3 input side is desirable.

FIG. 20 is a block diagram showing one embodiment of the audio signal recording processing circuit 21 used in the present invention. In the figure, 97a and 97b are analog compression circuits;
98a and 98b are A->D converters, and 99 is a digital signal processing circuit including a time compression circuit and an error correction signal addition circuit.

100 is a phase comparison circuit, 101 is a VCO, 10
2 is a frequency dividing circuit and constitutes a PLL. 103 is a digital pulse delay circuit that uses the output signal from the frequency divider circuit, and is similar to I or Li in Figure 5.
Convert the signal to Gi signal. The PLL circuit generates _2H , _386H from the frame frequency (I or Li), _2H becomes the sample pulse for the AD converter, and the _386H signal is the PCM signal (Ai, Bi...
) is used to generate pulses of 193 _H , which is All'1', and 386 _H , which is All'1'.

FIG. 21 is a block diagram showing one embodiment of the audio signal reproduction processing circuit 52 used in the present invention. In the figure, 104 is a digital signal processing circuit consisting of a time expansion circuit, an error correction circuit, etc., 105a, 10
5b is a DA converter, 106a and 106b are analog expansion circuits, and compression circuits 97a,
It has almost the opposite characteristics of 97b.

[Effects of the Invention] According to the present invention, it is possible to provide a magnetic recording and reproducing device that can selectively reproduce a desired track from a plurality of information tracks formed in the width direction of a magnetic tape with a simple configuration. effective.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing a tape pattern of a conventional home video tape recorder, Fig. 2 is a diagram showing a tape pattern of an 8mm video standard, and Fig. 3 is a tape pattern diagram for explaining the principle of the present invention. FIG. 4 is a block diagram showing one embodiment of the recording circuit of the present invention, and FIG.
The figure shows the signal waveform of each part in Figure 4, Figure 6,
FIG. 7 is a diagram showing an example of a tape pattern recorded by the apparatus of the present invention, FIG. 8 is a block diagram showing an embodiment of the write amplifier used in the present invention, and FIG. 9 is an embodiment of the reproducing circuit of the present invention. Block diagram showing an example, Part 1
Figure 0 is a diagram showing the signal waveforms of each part in Figure 9.
Figures 1, 12, and 13 are block diagrams showing another embodiment of the reproducing circuit of the present invention, and Figures 14, 15, 16, and 1
Fig. 7 is a diagram showing the switch operations of Figs. 9, 11, 12, and 13, Fig. 18 is a block diagram showing an embodiment of the preamplifier used in the present invention, and Fig. 19 is an example of a sample hold circuit used in the present invention. 20 is a block diagram showing an embodiment of the audio signal recording processing circuit 21 used in the present invention; FIG.
FIG. 1 is a block diagram showing one embodiment of the audio signal reproduction processing circuit 110. Explanation of symbols, 1...Magnetic tape, 23a, 23
b...Rotating head, 10, 11, 12, 13, 1
4, 15, 16... Divided diagonal track, 2
8... Pilot signal generator, 116, 117,
119...gate circuit, 69...sample hold circuit (pre-hold circuit).

Claims (1)

[Scope of Claims] 1. A rotary head that sequentially traces a magnetic tape obliquely, and a track formed on the magnetic tape by the tracing of the rotary head is divided into a plurality of sections in the width direction of the magnetic tape, In a magnetic recording/reproducing device capable of reproducing a recording signal recorded in an arbitrary divided section, the recording signal is frequency-multiplexed with an information signal and a common tracking pilot signal, and the tracking pilot signal is frequency-multiplexed with an information signal and a common tracking pilot signal. a common pilot signal extraction means for extracting the pilot signal from the reproduced recorded signal in which the pilot signal is selected at the lower side of the frequency band of the information signal; and a common tracking control for performing tracking control based on the extracted pilot signal. A magnetic recording device comprising: means; and operation control means for controlling the operation of the tracking control means so that tracking control is not performed depending on a pilot signal obtained from a divided section other than a predetermined divided section. playback device. 2. A first playback mode in which the above-mentioned information signal is played back from a magnetic tape in which, in one track, some divided sections are video signals and the remaining divided sections are time-axis compressed pulse code modulated audio signals; a second reproduction mode in which a magnetic tape consisting of a time-axis compressed pulse code modulated audio signal is reproduced in each division section of one track in which the information signal is one track; 2. The magnetic recording and reproducing apparatus according to claim 1, wherein in the reproduction mode, the magnetic recording and reproducing apparatus is one of the divided sections, and in the second reproduction mode, it is any specified divided section.