JPH0624073B2 - Information signal recording / reproducing device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an information signal recording / reproducing apparatus, and more particularly to recording an information signal in a main recording area on a tape-shaped recording medium and recording a control signal in a sub recording area on the same medium. In addition, the present invention relates to an information signal recording / reproducing apparatus for controlling the transfer of a tape-shaped recording medium using this.

<Description of Prior Art> In a video tape recorder (VTR) or an audio tape recorder that records and reproduces a video signal or an audio signal, a function of searching for a head portion or an unrecorded portion of a recorded signal, so-called cueing is conventionally used. Those having a blank search function are considered. By the way, when giving such a function to a helical scan type VTR, it is preferable to form a control track (sub-recording area) in the longitudinal direction of the tape end in addition to the helical track (main recording area). Seem. This is because when the playback signal obtained by tracing the track that is recording the video signal is used to perform the cue or blank search, the tape cannot be run so fast, and the search takes time. I will pass. Also, since only information on whether recorded or not recorded is obtained, it is not possible to perform cueing without some measures. Further, if the video signal is dropped due to dropout or the like, it may be mistakenly recognized as an unrecorded portion.

Considering the signal to be recorded in the control track, when performing both the blank search and the cueing, the control signal has information indicating whether the video signal has been recorded or not and the recorded video signal. Information that indicates the beginning part of is required. Therefore, it is conceivable to combine two or more kinds of signals to form the control signal, but a circuit for forming the control signal and a circuit for extracting both information from the reproduced control signal are required, and the configuration becomes complicated. Become.

When the video signal is unrecorded, the control signal is naturally unrecorded correspondingly, and accordingly, the control track corresponding to the unrecorded part of the helical track is also the unrecorded part,
This is information indicating that the video signal has not been recorded. Therefore, if the control signal is dropped out due to dropout or the like, there is a risk of mistakenly recognizing this as an unrecorded portion.

<Object of the Invention> An object of the present invention is to provide an information signal recording / reproducing apparatus capable of solving all the above problems. More specifically, the control signal to be recorded in the sub-recording area is an extremely simple signal, and it is possible to search for an unrecorded portion and find the information signal, and to perform more accurate finding of the information signal. The purpose is to provide a device.

<Description Using Embodiments> Hereinafter, embodiments in which the present invention is applied to a helical scan type VTR will be described in detail.

(Description of Overall Structure) FIG. 1 is a block diagram showing the main structure of the VTR of this embodiment. In FIG. 1, 1 is a magnetic tape as a recording medium, 2 is a rotary drum, 3a and 3b are rotary heads for recording and reproducing video signals, and heads 3a and 3b are fixed to the drum 2. . Reference numeral 4 is a drum motor for rotating the drum 2, 5 is a fixed head for recording / reproducing a queue signal (control continuous wave signal) described later, and 6 is a queue signal recording / reproducing circuit.

8 is a system controller, which is a VTR operation mode,
For example, information on each mode such as recording, reproduction, fast-forwarding, and rewinding is supplied to each unit of the apparatus. Reference numeral 9 is a cue control circuit for performing a cue using the reproduced cue signal, and 10 is a blank search control circuit for performing a blank search using the reproduced cue signal. I will explain in detail later.

Reference numeral 11 controls the capstan 13 via the capstan motor 12 to cause the capstan 13 to perform a desired operation based on information generated by the system controller 8, the cue control circuit 9, the blank search control circuit 10, and the like. This is a capstan motor control circuit.

Next, the operation of each part of the VTR shown in FIG. 1 will be described step by step.

(Description of Queue Signal Recording / Reproducing Circuit) First, queue signal (control signal) in the VTR of this embodiment.
This will be described with reference to FIG. In Figure 2,
Reference numeral 15 is a helical track (main recording area) formed on the magnetic tape 1, and a video signal is recorded and reproduced.
Reference numeral 16 is a queue track in which the queue signal is recorded.
It is formed in the longitudinal direction at the end of the tape 1. As shown in FIG. 2, the queue signal in the VTR of this example has a minute continuous wave signal recorded at a position corresponding to the recording start portion of the video signal (shown in FIG. 16a of FIG. 2), and a predetermined value thereafter. The length is not recorded signal (shown in FIG. 16b of FIG. 2), and the subsequent portion is also configured so that the same continuous signal is recorded. According to such a queuing signal, as will be described later in detail, only one type of continuous wave signal is used to perform the cue and the blank search, and the malfunction can be prevented.

FIG. 3 is a diagram showing one specific example of the queuing signal recording / reproducing circuit 6 configured to realize the queuing signal recording / reproducing as described above. In FIG. 3, 31 is a clock oscillator, 32, 35, 38, 45 and 47 are resistors and 3 respectively.
3, 34, 37 and 39 are transistors, 36 and 4 respectively.
4 is a capacitor, 40 is an inverting circuit (inverter),
41 and 42 are mono-multi vibrators, 43 is an amplifier,
46 is the winding of the head 5, 48 is the system controller 8
A terminal to which a more head control signal (HC) is supplied, 4
Reference numeral 9 is a terminal to which a reproduced queuing signal is supplied.

FIGS. 4 (a) to 4 (d) are timing charts showing the waveforms of the respective portions in FIG. 3, and the operation will be described below with reference to FIG.
As shown in FIG. 4 (a), the aforementioned HC is a low level (L) signal only when the VTR is in the video signal recording mode, and is a high level (H) signal otherwise.

First, the operation when recording a video signal will be described. When the VTR starts recording the video signal, HC changes from H to L. Accordingly, the output of the inverter 40 changes from L to H, and the transistor 39 is turned on (ON). Accordingly, the winding 46 becomes energizable.

On the other hand, the clock signal (shown in FIG. 4 (c)) output from the clock oscillator 31 turns on / off the transistor 33, and when the transistor 37 is turned off, the same waveform as the clock signal is passed through the capacitor 36 along with this. To the winding 46, and this signal will be recorded by the head 5 on the longitudinal track 16 as a queue signal.

Also, HC is supplied to the mono-multi 41, and the mono-multi 41
Trigger on the trailing edge of HC and output as Q output for a small period T ₁ (4th
(Shown in Fig. (B)) H is obtained. The mono-multi 42 is triggered at the trailing edge of the Q output of the mono-multi 41 and obtains an L signal as an output only for a predetermined period T ₂ shown in FIG. 4 (b). Since the transistor 37 is turned on when the output of the mono-multi 42 is L, the recording of the queue signal is prohibited during this T ₂ period. Since the transistor 37 is in the off state when the output of the mono-multi 42 is H, the clock signal described above is recorded as a queue signal at the time of recording the video signal except the period indicated by T ₂ as shown in FIG. 4 (d). To be done.

When recording the video signal, tape 1 is capstan 1
3 and a pinch roller (not shown), the vehicle is driven at a constant speed, so a queue signal as shown in FIG. At this time, the ratio of the length of the portion indicated by 16a in FIG. 2 in the longitudinal direction of the tape to that of the portion indicated by 16b is T ₁ : T ₂ .

Next, the operation when the video signal is not recorded will be described. At this time, since HC is H, the transistor 34 is ON, and the clock signal obtained from the clock oscillator 31 is cut off here. Further, since the output of the inverter 40 becomes L and the transistor 39 is OFF, the circuit configuration of the queue 5 is grounded from Vcc through the resistor 47, the capacitor 44, the head, the capacitor 36, and the transistor 34.

Therefore, if the tape 2 is running now and the head 5 traces the clock signal recording portion of the track 16, the recorded clock signal is the winding 46 of the head 5.
Is detected from one end of the signal, amplified by the amplifier 43, and supplied to the cue control circuit 9 and the blank search control circuit 10 which will be described later in detail through the terminal 49.

With the configuration as described above, recording and reproduction of the queue signal as shown in FIG. 2 can be performed. In the above-mentioned configuration, only the same clock signal is recorded / reproduced in order to enable cue and blank search, but various other signals can be obtained by superimposing other control signals and the above-mentioned queue signal. It goes without saying that the device can be controlled at the same time.

(Description of Cue Control Circuit) Next, the operation of the cue control circuit shown in FIG. 1 will be described. First, the method of cue control by the VTR of this example will be conceptually described with reference to FIG. The line 20 in FIG. 5 indicates the position of the head 5 on the track 16 when the tape is fast forwarded to perform the cueing, and the line 21 indicates the position when the tape is fast rewound to perform the cueing. Shows. In the figure, Δ indicates each detection position, and 0 indicates the final stop position.
The double line indicates that the tape is running at high speed.

First, when fast-forwarding the tape to find the beginning of the tape, point B (△ 2
In 2), a drop in the playback queue signal level is detected, and it is detected that this portion is the beginning portion of the recorded video signal or the beginning portion of the unrecorded portion. And that a subsequent predetermined distance t ₁ within reproduction Kiyu signal level rises again detected at point C (△ 23), to determine that this portion is the first portion of the recorded video signal. Then, the fast-forward is released at this timing, but in reality, the head 5 moves to the point E due to the inertia due to the high-speed running of the tape. Then, thereafter, the tape is rewound in the reverse direction at a low speed, and at the point B (Δ24), the rising of the reproduction queue signal level is detected and the tape running is stopped. In this case, since the tape is running at a low speed, the head 5 is placed at the position (025) near point B.
Will be located.

On the other hand, when the tape is rewound quickly for cueing, the distance from the falling edge to the rising edge of the playback queue signal is point B (△ 26)
If the distance is less than the predetermined distance t _{1, the} fast winding is released. At this time, the head moves to point A due to the inertia described above, but then the tape is fast-forwarded, and the steps (△ 22 ′, △ 23 ′, △ 24 ′, etc.) are performed through the same steps as the above-mentioned indexing by fast-forwarding the tape. As shown in 025 ', the tape is stopped when the head is located near the point B.

If the tape is cueed in this way, it consists of only one type of clock signal as described above. → Even if it is a queue signal, it is necessary to distinguish the beginning part of the recorded video signal from the beginning part of the unrecorded part. You can (Hereinafter, it is referred to as head-blank discrimination.) Also, when cueing is stopped, whether cueing by fast-rewinding or cueing by fast-forwarding,
Since the tape is fed at a low speed in a predetermined direction (rewinding direction) immediately before the stop, the stop position of the tape is extremely stable.
Moreover, the influence of the inertia mentioned above is small, and very good cueing can be performed. Furthermore, the length of the unrecorded portion 16b of the queue signal is always detected by running the tape in the same direction.
Since the low speed running direction is also the same, the tape stop command is obtained immediately before the unrecorded portion 16b (the leading edge portion), which is accompanied by the difference in the length of the unrecorded portion 16b and the running direction of the tape. The stop position does not become unstable. Furthermore, since the influence of inertia due to low speed running is reduced by utilizing the tape running amount based on the above-described head-blank discrimination, the maximum effect can be obtained by minimizing the number of steps until stopping.

FIG. 6 is a diagram showing an example of a specific circuit configuration for realizing the above-described cueing. The reproduced and amplified queue signal described with reference to FIGS. 1 and 3 is input to the counter 130 via the terminal 108. The terminals 115 and 116 are terminals to which a fast-forward (FF) cueing command and a fast-rewinding (FR) cueing command are input from the system controller 8, respectively, and each command is input as a pulse signal.

Next, the signals input to and output from the control data generating circuit 128 will be described. The control data generation circuit 128 is a circuit for supplying data to the capstan motor control circuit shown in FIG. The data is indicated by a white arrow in FIG. 6, but since it is not directly related to the present invention, detailed description thereof will be omitted. As signals input to the control data generation circuit 128, T ₁ is an FF traveling start command signal, T ₂ is a reverse reproduction start command signal, T ₃ is a stop command signal, and T ₄ is FR.
This is a running start command signal. As signals output from the circuit 128, T ₅ is a signal indicating the FF mode, T ₆ is a signal indicating the FR mode, T ₇ is a signal indicating the reverse reproduction mode, and T ₈ is a signal indicating the stop mode. That is, the control data generation circuit
128 generates data in response to each command signal of T ₁ , T ₂ , T ₃ , T ₄ , and shows how the capstan motor 12 is in T ₅ , T ₆ , T ₇ , This is shown by the output signal of T ₈ .

In FIG. 6, 111, 112, 117, and 118 are flip-flops, 131 and 132 are clock oscillators, 119, 120, 126, and 1 respectively.
27 and 134 are OR gates, 109, 113, 121, 122, 123, 12 respectively
4,125,133,134 and 135 are AND gates, 114 is a mono-multivibrator, 129 is an amplifier, and 110 and 130 are counters.

Hereinafter, the operation of the circuit shown in FIG. 6 will be described step by step with reference to FIG. Now, when the FF cue command is supplied from the terminal 115, the pre-flop 117 is set and the OR gate 120 is set.
One input signal of the AND gate 109 is set to H through. On the other hand, the H signal is also supplied to one terminal of the AND gate 121. At this time the tape is still stopped, so
Naturally, T ₈ is H. When T ₅ , T ₆ , T ₇ , and T ₈ are H, it indicates that the mode is the corresponding mode. Accordingly, the output of the AND gate 121 changes to H, and T ₁ changes to H through the OR gate 126. T
_{When 1} , T ₂ , T ₃ and T ₄ are H, the corresponding command shall be given. Therefore, at this time, the capstan motor 12 is FF.
The head 5 is controlled and driven, and the head 5 reproduces the track 16 and outputs a queuing signal.

The output queue signal is counted by the 4-bit counter 130, and when the count value exceeds 8, H is output from the Q terminal, resetting the 3-bit counter 110 and setting the flip-flop 111. Therefore, from the Q terminal of 111, H
Is output and the other input of the AND gate 109 is set to H. On the other hand, at this time, since the FF mode is set and T ₅ is H, one input terminal of the AND gate 135 is set to H through the OR gate 119.
It is said that.

The clock generators 131 and 132 generate clocks of frequencies corresponding to the recording / reproducing time and the FF and FR times, respectively. For example, F
Assuming that the tape speed at F and FR is 9 times that at the time of recording / reproducing, the frequency of the clock generated by the generator 132 is the same as that of the generator 131.
The frequency is 9 times the frequency of the generated clock. Therefore, even if the tape speed changes, the amount of tape generated by the generator 131 or 132 and running during one cycle of the clock is constant.

Since the device is in the FF mode here, the AND gate 135 supplies the output of the clock generator 132 to the AND gate 109 via the OR gate 134. At this time, the output of the timer 114, which will be described later, is L, the output of the flip-flop 111 is H, and the OR gate 1
The output of 20 is H, and the clock output from the clock generator 132 is counted by the 3-bit counter 110. The counter 110 is reset after every eight cu signal clocks. Here, the clock generator 131, 132
Since the frequency of the queue signal clock is set to be sufficiently higher than the frequency of the clock generated by, the 3-bit counter 11 is activated while the queue signal clock is being reproduced.
The number of clocks counted by 0 is 0 or 1.

That is, the 3-bit counter 110 measures the period until the queue signal clock is reproduced again when it is no longer reproduced. Q of the 2nd bit of the 3bit counter 110
The output of the terminal is H when the count value of the counter 110 is 2 and 3, and is Q at the 3rd bit when the count value is 4 or more.
The output of the terminal becomes H. When the Q terminal at the third bit becomes H, the flip-flop 111 is reset and the gate of the AND gate 109 is closed.

This operation will be described with reference to FIG.
When the reproduction queue signal clock is not obtained in 2), the counter 110 is not reset and starts counting the clock generated by the generator 132. The generator corresponds to the length of the unrecorded portion 16b and the tape speed so that the count number of the counter 110 becomes 2 or 3 until the queue signal clock is reproduced again at the point C (Δ23). 132 oscillation frequencies have been determined. Therefore, when the queue signal is started to be reproduced again at the point C (Δ23) and the Q output of the counter 130 becomes H, the AND gate 113 also changes to H and the flip block 1
The Q output of 12 turns to H. At this time, since both inputs of the AND gate 122 become H, the output (T ₂ ) becomes H, and the device enters the reverse reproduction (reverse P / B) mode. At this time, the counter 110 is reset. By the way, if the queue signal clock is not reproduced again after running the tape for the period of t ₁ , the Q output of the third bit of the counter 110 becomes H, the Q output of the flip-flop becomes L, and the clock does not pass through the AND gate 109. .

Incidentally, the interruption of the reproduction of the queuing signal clock may also occur due to the dropout. Further, in this configuration, the Q output may not be stably obtained from the counter 130 due to unstable tape running, which also apparently causes the interruption of the reproduction of the queue signal clock. However, according to the circuit configuration shown in FIG. 6, the number of clocks counted by the counter 110 during the interruption of the reproduction in this minute period is at most 1, so that the length of the unrecorded portion is shown in FIG. It is not the target of the determination as to whether it is longer or shorter than the given length t ₁ .

When the reverse P / B mode is commanded by T _{2 at} point C (Δ23) in FIG. 5, the capstan motor 13 is driven in the reverse direction (rewinding the tape) via the capstan motor control circuit 11. Direction) to move the tape at a low speed. However, at this time, the tape actually travels in the reverse direction at a low speed (tape speed equal to that at the time of recording) when the head 5 reaches the point E shown in FIG. 5 due to the inertia described above.

When the tape begins to run in the opposite direction at low speed, timer 114 is triggered to run timer 114 for a predetermined period of time. The operation output (Q) of the period timer 114 is inverted and supplied to the AND gate 109 to prevent passage of the clock. This prevents the above-mentioned determination of the length of the unrecorded portion from being made during the tape running unstable period after the mode switching. Further, in the reverse P / B mode, the output T ₇ of the capstan motor control circuit 128 becomes H, and the AND gate 133 supplies the clock output from the generator 131 to the AND gate 109 via the OR gate 134. When the output of the timer 114 turns to L, the clock output from the generator 131 is supplied to the counter 110.

When the head 5 reaches the point C again, the counter 110 is no longer reset, the counter 110 starts counting the clock output from the generator 131, and when the count advances to 2 or 3 as apparent from the above description. Point B again (△
Reach 24). Here, the queue signal clock starts to be reproduced again, and the AND gate 113 turns to H by the Q output of the counter 130, and the Q terminal output of the flip-flop 112 also becomes H. At this time, since T ₇ is H, both inputs of the AND gate 123 are H and the apparatus is in the stop mode and the tape running is stopped. At this time, since the influence of inertia is small, the tape stops when the head 5 reaches the 025 position.

Next, the case of receiving the FR cueing command will be described with reference to FIG. When the FR cueing command is supplied from the terminal 116, the flip-flop 118 is set, one input terminal of the AND gate 109 is set to H through the OR gate 120, and T ₄ becomes H. Therefore, the capstan motor 1
2 will be controlled and driven in FR mode. And T ₆ is H
Then, the output of the OR gate 119 becomes H, and the output of the generator 132 is AND gate 135 OR gate 134, AND gate 10
It will be supplied to the counter 110 via 9.

When the head 5 reaches point C and the queue signal clock is no longer reproduced, the reset of the counter 110 is released and the clock output from the generator 132 is counted by the counter 110 until the head B point (Δ26) is reached. Is counted 2-3 times during. When the queue signal clock is reproduced again at the point B, the output of the AND gate 113 shifts to H and the Q output of the flip-flop 112 becomes H. At this time, T ₆ is H
Therefore, via AND gate 125 and OR gate 126
T ₁ becomes H and FF mode is commanded. At this time, the head 5 moves to point A due to the inertia described above, and the traveling direction is reversed. Further, at this time, the output of the AND gate 125 is supplied to the timer 114 described above, and the output of the timer 114 is set to H for a while, so that the clock is output immediately after the mode switching.
Prevent from passing 9.

In this way, the FF mode is set, but the subsequent operation is the same as when the FF cueing command is issued, and therefore a detailed description is omitted. In addition, in Fig. 5, △ 22 ', △ 23', △
24 'performs the same operation as Δ22, Δ23, and Δ24, respectively, and the stop position 025 ′ is also the same position as 025.

As is apparent from the above description, the above-described cue can be realized by the circuit configuration shown in FIG.
Further, it goes without saying that the above-described effects corresponding to the above are provided. According to the configuration of FIG. 6, in addition to the above effects,
Even if there is a drop in the level of the reproduced queue signal for a minute period due to dropout or the like, there is no judgment error such that this is judged to be the head portion of the video signal.

(Description of Blank Search Control Circuit) Next, the operation and specific circuit configuration of the blank search control circuit shown in FIG. 1 will be described. First, a blank search control method in the VTR of this example will be conceptually described with reference to FIG. A line 50 shown in FIG. 7 shows the position of the head 5 on the track 16 in the blank search in the FF mode, and a line 51 shows that in the blank mode in the FR mode. . Fifth
Similar to the figure, Δ indicates each detection position, 0 indicates the final stop position, and two lines indicate high speed running of the tape.

First, in the blank search in the FF mode, it is detected that the level of the playback queuing signal does not rise even if the tape runs for a predetermined distance at the point G (△ 52) in the FF mode. Detect at point H (△ 53).
Thereby, it is detected that this portion is the head portion of the video signal unrecorded portion. Then, the FF is released at this timing, but the head 5 moves to point I due to inertia as described above. Then, thereafter, the tape is stopped in the reverse direction at low speed by detecting the rising edge of the reproduction queue signal at point G (Δ54). In this case, since the tape is running at a low speed, the head will stop at a position (055) near the point G.

On the other hand, when performing a blank search in the FR mode, the FR mode is released when the rising edge of the reproduction queue signal is detected at point G (Δ56). At this time, the head 5 moves to the point F due to the inertia described above, but after that, the FF mode is set, and the steps similar to those in the blank search in the FF mode described above are performed (shown in Δ52 ′, Δ53 ′, Δ54 ′). ), 055 ', the tape is stopped when the head 5 is located near the point G.

If the blank search is performed by the above-described method, the blank search can be surely distinguished from the cueing even if the queue signal includes only one type of clock signal. Moreover, the tape stop position is stable and the influence of inertia is small.
Furthermore, the number of steps before stopping can be minimized.

FIG. 8 is a diagram showing an example of a specific circuit configuration for realizing the blank search as described above. In Figure 8
Reference numeral 208 is a terminal to which the reproduction queue signal output from the terminal 49 in FIG. 3 is input, and the same signal as that supplied to the terminal 108 in FIG. 6 is supplied. The terminals 215 and 216 are terminals to which the FF blank search command and the FR blank search command are input from the system controller 8, and the respective commands are input as pulse signals. 201 is a detection circuit, 202, 203 and 204 are mono-multivibrators respectively, 20
5 is an inverting amplifier, 216, 217 and 218 are delay circuits respectively, 219, 2
20, 221, 222, 223, 224 and 225 are AND gates, 228 is a control data generation circuit, and 229 and 230 are oates. The control data generation circuit 228 is the same circuit as the circuit 128 of FIG. 6 described above, and the description thereof is omitted. The circuit 2
T _'1 ~T' ₈ 28 are respectively corresponding to T ₁ through T ₈ of the circuit 128, it indicates the same input and output.

Hereinafter, the operation of the circuit shown in FIG. 8 will be described step by step with reference to FIG.

First, the operation during FF blank search will be described. Terminal
When a pulse for instructing an FF blank search is input from 215, it is supplied to one input of an AND gate 224 via an OR gate 229. At this time the tape is stopped so
T _'8 is H. Moment accordance connexion T _'1 in response to the pulse H
, The tape is fast forwarded, head 5 is track 16
To trace and output a playback queuing signal.

In this state, when the head 5 reaches the point G (Δ52) shown in FIG. 7, the output of the detection circuit 201 changes from H to L. At the same time, the output of the inverting circuit 205 also shifts from L to H. At the falling edge of the output of the detection circuit 201, the monomulti 202 triggers to generate a narrow pulse. This pulse is supplied to the AND gate 223 after being delayed by the delay circuit 216 for the time (τ ₁ ) required to run the tape t _{1 for} a predetermined distance at the time of FF. After τ ₁ after the head 5 passes the point G, the head 5 reaches the point H (Δ53), but if the queue signal is not reproduced again at this time, the output of the detection circuit 201 remains L and is inverted. The output of circuit 205 is high. Therefore this part
If (point G) is the head of the video signal unrecorded portion (head of the blank), the AND gate 223 generates a pulse at the timing of Δ53.

The output pulse of the AND gate 223 is supplied to one input terminal of the AND gate 220. 'While ₅ is supplied, this time T' to the other input terminal of the AND gate 220 T ₅ is H pulse indicating the beginning of the blank AND gate 22
It becomes T ′ ₃ via 0 and the OR gate 230. Therefore, the apparatus enters the stop mode at this timing to stop the tape running, but actually the tape does not stop until the head 5 reaches the point I due to the inertia described above.

When the device is stopped mode T _'8 is turned to H, a pulse indicating a blank head described above is supplied to one input terminal of the AND gate 222 via the short time delay circuit 217. In this case again T _'8 because is decreased to H, T from the AND gate 222' is output narrow pulses as a _2, the device is reversed P / B mode.

When the device enters the reverse P / B mode and the tape starts running in the reverse direction at a low speed, and the head 15 reaches point G again (△ 54),
The output of the detection circuit 201 changes from L to H. Mono Multi 204
Triggers on the rising edge of the input and outputs a narrow pulse.
Therefore, the AND gate 221 outputs a narrow pulse at the timing of Δ54, and the pulse is transmitted through the OR gate 230 to T ′.
It becomes ₃ . For this reason, the apparatus is again in the stop mode, but at this time, since the tape traveling speed is low, the tape stops at the position (055) where the head 5 is close to the point G.

Next, the operation of each part in FIG. 8 when an FR blank search command is issued will be described with reference to the line 51 shown in FIG. FR When narrow pulse indicating the blank search is supplied to the terminal 216, T the pulse through the AND gate 225 _'4
Is supplied to the circuit 228. In this way, the device FR mode is set, and when the head 5 reaches the point G (Δ56), the output of the detection circuit 201 becomes H. At this time, the output of the AND gate 219 also changes to H, and the monomulti 203 which triggers at the rising edge of the input generates a narrow pulse. This pulse becomes T ′ ₃ via the OR gate 230, and puts the device into the stop mode at the same time, and after being slightly delayed by the delay circuit 218, is then supplied to the AND gate 224 via the OR gate 229. Already T When this _'8 AND gate 224 and summer and H narrow pulse T' occurs as _1. At this time, the tape is stopped by the inertia when the head 5 reaches the point F, after which the apparatus enters the FF mode and performs the same operation as the FF blank search described above. That is, △ 52 ', △ 5 in Fig. 7
3 ′ and Δ54 ′ perform the same operations as Δ52, Δ53, and Δ54, respectively, and the stop position 055 ′ is also the same position as 055.

As is clear from the above description, the blank search as described above can be realized by the circuit configuration shown in FIG. Further, it goes without saying that the above-mentioned effects can be obtained accordingly. At this time, it is even more preferable if the detection circuit 201 is configured so as not to react to a decrease in the reproduction queue signal level for a minute time due to dropout or the like.

(Explanation of Partial Modification of Configuration) In the VTR as one embodiment of the present invention described above, the queuing signal can be used for so-called cue search and blank search. When it is desired to add another control function to the VTR, the function can be easily added by superimposing another signal on the queue signal of the above embodiment. In this case, for example, it is desirable to superimpose them by frequency division so that they can be easily separated when the queuing signal is reproduced.

Further, in the VTR of the above-described embodiment, the cue control recording 9 and the blank search control circuit 10 are completely separate, but as is apparent from the above description, there are many parts that perform similar operations. Yes, these can be shared.

Further, in the above-mentioned example, the tape running at the time of FF and FR is performed by the capstan, but this can of course be performed by driving the reel. However, in this case, since the tape running speed changes momentarily due to the change in reel winding diameter,
Since it is extremely difficult to obtain the predetermined distance t ₁ , it suffices to consider the fact that t ₁ changes within a predetermined range. For example, the determination criteria of the counter 110 and the delay time of the delay circuit 216 may be set to values that can determine whether the beginning or blank of the video signal even if t ₁ changes to some extent.

<Explanation of Effect> As described above in detail with reference to the embodiments, according to the present invention, the control signal to be recorded in the sub-recording area is simplified and simplified and the unrecorded portion is searched and the information signal is obtained. It is possible to obtain an information signal recording / reproducing device capable of cueing. Further, it is possible to accurately perform cueing using this control signal.

[Brief description of drawings]

FIG. 1 is a diagram showing a main configuration of a VTR as an embodiment of the present invention, FIG. 2 is a diagram for explaining a queue signal (control signal) in the VTR of FIG. 1, and FIG. FIG. 4 is a diagram showing a specific example of a queuing signal recording / reproducing circuit for recording / reproducing the queuing signal shown in FIG. 4, FIG. 4 is a timing chart showing waveforms of respective portions in FIG. 3, and FIG. 5 is a VTR according to FIG. FIG. 6 is a diagram conceptually showing a cue control method, FIG. 6 is a circuit diagram showing a specific example of the cue control circuit in FIG. 1, and FIG. 7 is a blank search control method by the VTR of FIG. FIG. 8 is a conceptual diagram, and FIG. 8 is a circuit diagram showing a specific example of the blank search control circuit in FIG. 1 is a magnetic tape as a tape-shaped recording medium, 3a and 3b are heads for recording video signals as information signals, 5 is a head for recording control signals, 13 is a capstan included in the transfer means, Reference numeral 15 is a helical track as a main recording area, 16 is a longitudinal track as a sub recording area, 37 is a transistor 41, 42 is a mono-multivibrator, respectively.

Claims (1)

[Claims] 1. A transport means for transporting a tape-shaped recording medium in its longitudinal direction, and a first means for recording an information signal in a main recording area of the medium while the medium is being transported at a constant speed by the transport means. Recording means, second recording means for recording a continuous wave signal in a sub recording area on the medium in parallel with the main recording area, and a predetermined period from a predetermined time after the start of recording by the first recording means Recording control means for inhibiting the recording of the continuous wave signal and controlling the second recording means so as to record the continuous wave signal during another period during recording by the first recording means; First reproduction means for reproducing the information signal from a recording area, second reproduction means for reproducing the continuous wave signal from the sub-recording area, and reproduction output of the second reproduction means, Non-recording of the continuous wave signal for the predetermined period Means for detecting the amount of the leading edge, to control the transfer means based on the output of the detection means, the information signal recording and reproducing apparatus and a transport control means for beginning of the information signal.