JPH0430234B2 - - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a video tape recorder, and more particularly to a splicing method and apparatus therefor.

(Technical background of the invention and its problems) In order to continuously record a new part from the previously recorded part in a video tape recorder,
In other words, to perform splicing, the tape is rewound a certain amount of time from the end of the previously recorded section.
Next, when splicing starts, the operation is set to replay mode for a certain period of time, and in this mode, the phase of the previously recorded video signal and the newly recorded video signal is matched, and then the new signal is recorded. In this case, there is a difference between the amount of normal tape rewinding and the amount of tape taken up until the capstan servo operates and stabilizes in playback mode.
Therefore, the amount of tape rewinding is greater than the amount of tape winding until new recording is performed. In this case, the new video signal necessarily overlaps the previously recorded video signal. Such a recording method requires a small amount of rewinding, and therefore can provide a better reproduced image than a recording method in which a blank space is created between an old video recording pattern and a new video recording pattern. In the overlap part, most of the old video signal is erased, but a part of it is not erased. Therefore, an unpleasant beat occurs when the overlap portion is played back. In order to perform continuous shooting without causing overlap, a rotary erasing head may be provided close to the video head, but this is not economical.

(Object of the Invention) The present invention provides a splicing method for a videotape recorder that can continuously form a new video recording pattern with respect to an old video recording pattern without forming a blank area or an overlapping area in between. The purpose of this invention is to provide a device for this purpose.

(Summary of the Invention) According to the splicing method of the present invention, the first and second rotations are performed at the timing when the video track is recorded on the magnetic tape by the first rotation video head by the recording pause operation during the recording mode. The supply of video signals to the video head is stopped. Thereafter, the magnetic tape is rewound for a certain period of time, and the recording pause operation is released to cause the tape to run in the forward direction. Before the recording pause operation, the final track of the video track pattern recorded by the first and second rotating video heads is detected, and at the timing when the first rotating video head finishes tracing this final video track, the first and second rotating video heads are detected. The supply of video signals to the second rotating video head is resumed.

To detect the last track, one of the trick play video heads on the rotating disk can be used.

(Effects of the Invention) According to the present invention, the final video track of the old video recording pattern is recorded by the first rotating video head, and the first video track of the new video recording pattern is recorded by the second rotating video head adjacent to the final track. Since recording can be performed using a video head, it is possible to provide a better reproduced image than in the case where a blank area or an overlapping area is formed between the old video recording pattern and the new video recording pattern.

If an existing special playback video head is used as a means for detecting the final track of an old video recording pattern, the configuration can be simplified.

(Embodiment of the Invention) Recently, home video tape recorders have come on the market that are equipped with two auxiliary rotary heads for special playback such as slow and still in addition to two rotary heads for normal recording/playback. It's going around. Hereinafter, the continuous shooting method of the present invention will be explained using an example using such a video tape recorder. As will become clear from the following explanation, in this embodiment, one of the two special playback rotary heads is effectively used for continuous shooting, but for simple continuous shooting, normal recording /In addition to the two rotary heads for playback, it is sufficient to provide one rotary head for continuous shooting.

FIG. 1 shows the positional relationship of four rotating heads on a rotating disk. A and B indicate main video heads for normal recording/playback, and SA and SB indicate auxiliary video heads for special playback. The main video head and the auxiliary video head are arranged in orthogonal relationship. T indicates a videotape, which runs in the direction indicated by the arrow during recording/playback. The rotary disk also rotates in the direction indicated by the arrow.

An outline of the continuous shooting method of the present invention will be explained with reference to FIGS. 2A and 2B showing magnetic recording patterns.
In order to perform continuous shooting, it is sufficient to perform a recording pause operation and then release the recording pause operation.

When the recording pause operation is performed, the recording mute state is entered when recording by head A is completed. In FIG. 2A, diagonal video tracks B ₁ , A ₁ ,
B ₂ , A ₂ , B ₃ , A ₃ indicate previously recorded old recording patterns, tracks B ₁ , B ₂ , B ₃ were recorded by head B, tracks A ₁ , A ₂ , A ₃ is recorded by head A. Each video track corresponds to one field of the video signal. Truck A ₃
is the last video track, and this video track
At the end of forming _A3 , heads A and B are in the positions shown on the tape. This corresponds to the relative positional relationship between the tape T and the rotary heads A and B shown in FIG.

Then, after the video track _A3 is formed, the tape T is rewound for a certain period of time. The amount by which the tape is rewound at this time is set to be slightly larger than the amount by which the tape travels until the capstan servo system stabilizes after the tape starts traveling in the forward direction upon release of the recording pause.

After the recording pause is released, the tape T starts running in the forward direction. Heads A and B are old tracks A ₁ and B ₂
When the point of tracing is reached, the capstan servo system becomes stable, and the phase of the control pulse reproduced from the control track of the tape T and the head switching pulse obtained by the rotation of the rotary disk becomes in a predetermined relationship. In this state, a new video signal can be appropriately recorded.

However, at this point, the recording mute state has not been released, so new recording cannot be performed. The aforementioned auxiliary head SA is used as a means for detecting the recording start position of a new recording pattern, and is put into a playback state for continuous shooting.

Therefore, while the tape T is running in the forward direction, the main head A is recording the video track of the old recording pattern.
When tracing A ₁ , as shown in Figure 2B,
Auxiliary head SA traces tracks A ₁ and B ₂ . Therefore, the output signal from the auxiliary head SA is reproduced at a high level. When the main head A traces the last track _A3 of the old recording pattern, the video track adjacent to track _A3 has not been formed, so the reproduction signal level of the auxiliary head SA drops considerably, and this causes the old recording pattern to be traced. The end of the record is detected, the recording mute state is released, and a new video track is formed by main head B adjacent to track _A3 . That is,
According to the splicing method of the present invention, the last track of the old recording pattern, in other words, the starting position of the new recording pattern, is detected by the auxiliary head, so that the new recording pattern can overlap the old recording pattern in an overlapping area or a blank area. can be formed adjacently without providing. It should be noted that it is not always necessary to arrange the auxiliary heads for continuous shooting at an interval of 90° from each of the main heads A and B.

Hereinafter, an embodiment of the above-mentioned continuous shooting method will be described with reference to FIG.

The video signal is sent to the recording mute circuit 11 and the recording amplifier 1 to which the power supply REC+V is supplied during recording mode.
2 to the main heads A and B of the rotary head assembly 10. Main heads A and B are also connected to playback preamplifiers 13 and 14, respectively, while auxiliary heads SA and SB are connected to playback preamplifiers 15 and 16, respectively. Playback preamplifiers 13 to 16 are powered by PB during normal playback mode.
+V is supplied to amplify the input signal. The playback preamplifiers 13 to 16 are powered on even during continuous shooting mode, from when the recording pause is released until the start of new recording.
AE+V is supplied.

The outputs of the reproducing preamplifiers 13 and 14 are coupled via head changeover switches 17 and 18 to one input of a head changeover switch 21. The outputs of the playback preamplifiers 15 and 16 are output from the head selector switch 1.
9 and 20 to the other input of head selector switch 21. Head changeover switch 21
The output of the preamplifiers 13 to 16 is coupled to an FM demodulator 22 which is supplied with a power source PB+V or AE+V. Pair switches 17 and 18 and other pair switches 19 and 20, respectively, are turned on and off alternately by 30 Hz head switching pulses from head switching pulse generator 23. The head exchange switch 21 is controlled by the head exchange pulse from the head exchange pulse generator 26 and, during normal recording/reproduction mode, outputs the output signals of the reproduction preamplifiers 13 and 14 connected to the main heads A and B.
On the other hand, during special playback mode or continuous shooting mode, the auxiliary head SA and
The output signals of the reproduction preamplifiers 15 and 16 connected to the SB are supplied to the demodulator 22.

Associated with the rotating head assembly 10 are fixed pick up heads PG ₁ and PG ₂ whose outputs drive a head switching pulse generator 23 to generate the head switching pulses described above. The head switching pulse generating circuit 23 is supplied with the above-mentioned head switching signal, and when this switching signal specifies main heads A and B, it generates a main head switching pulse;
An auxiliary head switching pulse is provided at its output when the switching signal specifies auxiliary heads SA and SB.

A recording pause signal generation circuit 24 is provided which is driven by an operator to generate a recording pause signal. The output of this recording pause signal generation circuit 24 is the recording mute signal REC/
A set input S of the flip-flop circuit 25 that generates MUTE, a head exchange signal generator 26, a power supply circuit 27 that generates the power supply voltage AE+V for operating the playback preamplifiers 13 to 16 during continuous shooting mode, and a playback mute signal PB. MUTE
, a reel/capstan control circuit 29 that generates a control signal RV for winding the tape for a certain period of time, a control signal FW for running the tape in the forward direction, and a capstan servo system. It is connected to a capstan servo switching circuit 30 for switching between mode and playback mode.

The output signal of the head changeover switch 21 is supplied to an envelope detector 31, and the level of the output signal of this detector 31 is detected by a level detector 32. The output of level detector 32 is coupled to the D input of D-flip-flop circuit 33. The output pulse of the head switching pulse generation circuit 23 is supplied to the clock input CP of the flip-flop circuit 25 mentioned above, and is also supplied to the monostable multivibrator 3.
4, supplied to the slow/still control pulse generation circuit 36. The output of monostable multivibrator 34 drives monostable multivibrator 35, the output of which is coupled to the clock input CP of D-flip-flop circuit 33. The D-flip-flop circuit 33 has a DISABLE terminal, to which the output of the reproduction mute circuit 28 is coupled. The D-flip-flop circuit 33 forms the recording mute reset signal, and its output Q is coupled to the reset input R of the flip-flop circuit 25, which forms the recording mute signal REC.MUTE. The output Q of the flip-flop circuit 33 is also coupled to the head exchange signal generating circuit 26, the continuous shooting power supply AE+V generating circuit 27, and the capstan servo switching circuit 30.

The playback mute signal PB/MUTE is generated for a certain period of time until the capstan servo system stabilizes after the recording pause is released, and makes the output Q of the flip-flop circuit 33 high. This causes the detection of the output level of the auxiliary head to be ignored for the certain period of time. When the output level of the auxiliary head decreases after a certain period of time, this causes the flip-flop circuit 33 to
The output Q of becomes low. As a result, the head exchange pulse generation circuit 26 specifies the main heads A and B, and therefore the head exchange pulse generation circuit 23 specifies the main heads A and B.
outputs the main head switching pulse. In response to the main head switching pulse, the output Q of flip-flop circuit 25 goes low, canceling the recording mute.
Therefore, the last track of the old recording pattern
A new video track is formed by head B adjacent to _A3 .

Control pulses CTLP reproduced from the control track of the tape by the control head CTL are applied to one input of a switch 37 controlled by the output of the capstan servo switching circuit 30. The output pulse FGP of the head FG for detecting the rotation of the capstan shaft is supplied to the other input of the switch 37 and also to the AFC circuit 38. The output of switch 37 is supplied to APC circuit 39.
The outputs of the AFC circuit 38 and APC circuit 39 are output to the adder 4
0 and supplied to one input of switch 41. The output of the slow/still pulse generation circuit 36 is supplied to the other input of the switch 41. The capstan motor 42 is servo-controlled by the output of the switch 41. The rotational direction of the capstan motor 42 is controlled by a control circuit 43 to which a forward feed signal FW or a reverse feed signal RV from the reel/capstan control circuit 29 is supplied. The switch 37 controls pulse FGP in recording mode and pulse CTLP in playback mode.
It is supplied to the APC circuit 39. The switch 41 is operated by a slow/still control signal generating circuit 44 driven by the operator. In the slow/still re-output mode, the capstan motor 41 is controlled by the output of the slow/still pulse generation circuit 36, and in the normal recording/reproducing mode, it is controlled by the AFC circuit 37 and the APC circuit 38.
The output of the slow/still control signal generating circuit 44 is also coupled to the head exchange signal generating circuit 26, which controls the auxiliary head SA when slow/still playback is specified.
and generates a signal to select SB. The reel motor 45 is connected to the reel/capstan control circuit 29
The direction of rotation is controlled by a control circuit 46 to which a forward feed signal FW or a reverse feed signal RW is supplied.

Hereinafter, the operation of the continuous shooting device shown in FIG. 3 will be explained in detail with reference to the timing chart shown in FIG. 4. 4a shows the video signal including the vertical synchronizing signal VS, FIG. 4b shows the switching pulses for the main heads A and B generated by the head switching pulse generation circuit 23, and FIG. 4c shows the auxiliary head SA.
and switching pulses for SB are shown. In the continuous shooting mode, the switching pulse shown in FIG. 4i is output from the head switching pulse generating circuit 23. When the main head switching pulse is high, switch 18 coupled to main head B is turned on, while when it is low, switch 17 coupled to main head A is turned on. When the auxiliary head switching pulse is high, the switch 20 connected to the auxiliary head SB is turned on,
On the other hand, when the signal is low, switch 19 connected to the auxiliary head SA is turned on.

When the recording pause circuit 24 is driven at time _t1 ,
REC/PAUSE signal becomes high. As a result, the output Q of the flip-flop circuit 25 becomes high in synchronization with the rising edge of the main head switching pulse output from the head switching pulse generating circuit 23, thereby activating the recording mute circuit 11. What should be noted here is that
The recording mute is started when recording by the main head A is completed. After a slight delay after the recording pause operation, the reel/capstan control circuit 29 generates a _T0 tape rewind signal RW for a certain period of time, as shown in FIG.
Then, the capstan motor 42 is reversed to rewind the tape by a certain amount.

When the recording pause operation is canceled at time _t2 ,
REC/PAUSE signal becomes low. In response, the reel/capstan control circuit 29 generates a tape forward feed signal FW as shown in FIG. drive in the direction. At the same time, the head exchange signal generation circuit 26
As shown in Fig. 4h, the output of the head goes high, switching the head exchange switch 21 to the auxiliary head side, and also causes the head switching pulse circuit 23 to switch the auxiliary head to the auxiliary head side, as shown in Fig. 4i. Output switching pulse. In response to the fall of the REC/PAUSE signal, the output of the reproduction mute circuit 28 becomes high for a certain period of time until the capstan servo system stabilizes to avoid malfunction _T1 , as shown in FIG. 4m. As a result, flip-flop circuit 33 is disabled and its output Q is forced high. This is to prevent the flip-flop circuit 33 from responding to the detection result of the output level of the auxiliary head SA until the capstan servo system is stabilized. In addition, in response to the fall of the REC/PAUSE signal, the continuous shooting power supply circuit 27 is driven and the continuous shooting power supply voltage is increased as shown in Figure 4o.
AE+V is supplied to reproduction preamplifiers 13 to 16. This makes it possible to reproduce old video signals. At the same time, the capstan servo switching circuit 30
However, as shown in FIG. 4p, the switch 37 is switched so that the control pulse CTLP reproduced by the control head CTL is supplied to the APC circuit 39. That is, the capstan servo system is controlled in playback mode. FIG. 4i shows the reproduction output signal of the auxiliary head SA in the reproduction mode after the recording pause is released. This output signal is sent to the envelope detector 31
is applied, and its envelope is detected as shown in FIG. 4k. The output pulse of the head switching pulse generation circuit 23 is applied to a negative edge triggered monostable multivibrator 34, which drives a negative edge triggered monostable multivibrator 35 to produce an output as shown in FIG. make a signal. The time constants of multivibrators 34 and 35 are selected such that each negative output pulse of multivibrator 35 occurs during a period when the output pulse of head switching pulse generating circuit 23 is low.

Flip-flop circuit 33 transfers the voltage level of its D input to its output Q in response to the positive edge of the output pulse of monostable multivibrator 35 at its clock input CP. However, for a certain period T ₁ after canceling the recording pause,
That is, during a period in which the operation of the capstan servo system in the reproduction mode is considered unstable, the flip-flop circuit 33 is disabled and its output Q remains high. This is an auxiliary head
This means that the detection of SA playback output is ignored. When the auxiliary head SA traces the old recorded pattern after a certain period of time _T1 , a reproduced output signal is obtained from the auxiliary head SA while the head switching pulse is low, as shown in FIG. 4j. Therefore, an envelope output of a relatively high level can be obtained from the envelope detector 31. This envelope output is detected by level detector 32. Therefore, since the output of the level detector 32 is positive at the positive edge of the output of the multivibrator 35, the flip-flop circuit 33
The output Q of remains high, as shown in FIG. 4n. As shown in FIG. 2B, when the auxiliary head SA traces the last track _A3 of the old recording pattern, the output level of the auxiliary head SA decreases and the output of the level detector 32 goes low. Therefore, in response to the positive edge of the output pulse of multivibrator 35, the output Q of flip-flop circuit 33 goes low at time _t3 .
In response, head exchange pulse generation circuit 26
The output of becomes low as shown in Figure 4h,
This causes the head exchange switch 21 to select main heads A and B, and causes the head exchange pulse generation circuit 23 to select the main head A and B, as shown in FIG. 4i.
Outputs the main head switching pulse. In response to the rising edge of the main head switching pulse immediately after this, the output Q of the flip-flop circuit 25 is
The REC/MUTE signal goes low and recording resumes. It should be noted here that since recording is resumed in synchronization with the rising edge of the main head switching pulse, a new video track will be formed by main head B adjacent to the final track _A3 of the old recording pattern. It is.

In response to the fall of the output Q of the flip-flop circuit 33, the continuous shooting power supply AE+V goes low as shown in FIG. FGP
controlled using

The above-described continuous shooting system of the present invention can also be implemented using a microcomputer system.
An example using a microcomputer will be described below. FIG. 5 shows an embodiment using a 4-bit 1-chip microcomputer (Toshiba TMP4315), and the same parts as in the embodiment of FIG. Omitted.

In FIG. 5, the reference numeral 100 represents the aforementioned
A bit-1-chip microcomputer with pins 1 to 9. Pins 1, 2 and 3 are input ports, and pins 4 to 9 are output ports. A recording pause circuit 24 is connected to pin 1, and a high level is input when the recording pause is operated, and a low level is input when the recording pause is released. An input pulse is applied to pin 2 and its falling edge is detected. The output Q of the flip-flop circuit 33 is connected to pin 3, and as described above, when the start position of a new recording pattern is detected during the playback mode for continuous shooting, the input level becomes low. During this regeneration mode, during a certain period T ₁ until the capstan servo system stabilizes, the microcomputer 1
00, the output level of the flip-flop circuit 33 is ignored. Pin 4 is recording mute circuit 1
1, and when the output level is high, a recording mute operation is performed, while when it is low, recording is enabled. Pin 5 provides an output for switching the capstan servo system between playback mode and record mode, and when its output level is high
The FG pulse is used to control the capstan motor 42 in recording mode, while when low,
It is controlled in a regeneration mode using CTL pulses.
Pin 6 outputs a power supply AE+V (high level) for operating preamplifiers 13 to 16 for continuous shooting. Pin 7 outputs a head exchange signal, and when the output level is high, the auxiliary head SA,
SB is specified, and when it is low, main heads A and B are specified. Pin 8 outputs a high level signal FW that rotates the reel and capstan in the normal direction. pin 9
outputs a high level signal RV that reverses the reel and capstan.

The switch 101 is a switch that is switched by the slow/still circuit 43 or the output of pin 7 of the microcomputer 100, and outputs the main head switching pulses A and B from the head switching pulse generation circuit 23.
Alternatively, select auxiliary head switching pulses SA and SB.

The main head switching pulse from head switching pulse generating circuit 23 is coupled to one input of NAND gate 102, the other input of which is coupled to pin 5 of microcomputer 100. The output of NAND gate 102 is connected to pin 2 of microcomputer 100 for detecting the falling edge of the input pulse. this
The NAND gate 102 inverts the main head switching pulse in the recording mode and sets the switching timing from main head A to main head B at the beginning and end of the recording mute operation to the falling edge of the inverted main head switching pulse. It is provided to accommodate.

The operation of the continuous shooting system using a microcomputer will be explained below using the flowchart shown in FIG.

First, a recording operation is performed by a start operation. During recording operation, pin 4 level is low, pin 5
is high, pin 6 is low, pin 7 is low, pin 8 is high, and pin 9 is low. That is, recording mute is released, the capstan servo system is in recording mode, and the reproduction preamplifier is inactive. Furthermore, the main head switching pulse is supplied to the head switching switch, and the reel and capstan are rotating in the normal direction.

Next, it is checked whether the level of pin 1 is high. If not high, the recording operation continues. If the level of pin 1 is high, that is, if a recording pause operation is performed, then
The falling edge of the output pulse of NAND gate 102 applied to pin 2 is detected. The above operation is maintained until this falling edge, ie, the timing at which recording by main head A ends, is detected. When a falling edge is detected, pin 4
The level changes from low to high to start recording mute.

After the start of recording, the level of pin 9 is switched from low to high to reverse the reel and capstan for a certain period of time _T0 , that is, to rewind the tape. Next, when the tape is rewound for a certain period of time _T0 , the level of pin 9 changes from high to low, and the reel and capstan stop. Next, it is checked whether the level of pin 1 is low, that is, whether the recording pause is released. If the recording pause is released, the operation proceeds to a playback mode for continuous shooting. In this reproduction mode, the level of pin 5 changes to low, the level of pin 6 changes to high, the level of pin 7 changes to high, and the level of pin 8 changes to high. That is, the capstan servo operates in regeneration mode, the preamplifier operates, the head switch operates with the auxiliary head switching pulse,
The reel and capstan rotate forward. Next, it is determined whether this operation has been performed for a certain period _T1 until the control pulse CTLP and the head switching pulse match in phase. If T ₁ passes for a certain period of time,
As the next step, the output level of the flip-flop circuit 33 to which pin 3 is connected is determined. As explained in the previous embodiment, the main head A
When the tracker is tracing the last track of the old recorded track pattern, the input level at pin 3 is low. If the input level at pin 3 is detected to be low, operation proceeds to the recording state. In other words, the level of pin 5 becomes high, the level of pin 6 becomes low, and the level of pin 7 becomes low, the capstan servo system operates in recording mode while the recording mute state is maintained, and the playback preamplifier does not operate. and the head switch is switched by the main head switch pulse.

Next, the NAND gate 10 fed to pin 2
A step of detecting the falling edge of the second output pulse is performed. When a falling edge is detected, that is, when the end of tracing the last track of the old recording pattern by main head A is detected, recording is resumed as the next step. That is, the level of pin 4 goes low, the recording mute is released, and the main head B forms a new video track adjacent to the last track of the old recording pattern. In this way, the operation for continuous shooting ends.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the positional relationship of the rotary heads on the rotary disk; FIGS. 2A and B are diagrams showing recording patterns on the magnetic tape to explain the outline of the continuous shooting method according to the present invention; FIG. 3 is a diagram schematically showing a continuous shooting device embodying the present invention;
The figures are a timing chart for explaining the operation of the continuous shooting system shown in Fig. 3; Fig. 5 is a diagram showing the main parts of an embodiment of the continuous shooting system using a microcomputer; 6 is a flowchart for explaining the operation of the embodiment shown in FIG. 5. A, B...first and second rotating video heads;
SA, SB...Auxiliary heads, _A1 , _A2 , _A3 ...Video tracks recorded by the first video head A,
_B1 , _B2 , _B3 ...Video tracks recorded by the second video head B.

Claims (1)

[Claims] 1. Arranged at intervals of 180° on a rotating disk, 1.
The video signal for each field is recorded sequentially on a magnetic tape as a diagonal video track, or
A splicing method for a video tape recorder having first and second video heads for sequentially reproducing video signals for each field, the video tape recorder being operated in a recording mode, recording the video signals on the magnetic tape. When video tracks are sequentially recorded by the first and second video heads, and a recording pause operation is performed during the sequential recording, recording of the video track (final video track) by the first video head is completed. At this point, the supply of the video signal to the first and second video heads is stopped, and after the supply of the video signal is stopped, the magnetic tape is rewound for a certain period of time, and after this rewinding is performed, the recording When the pause operation is released, the magnetic tape is run in the forward direction, and when this run is started, the output state of the auxiliary head, which rotates before the second video head, is changed to detecting the final video track by the first video head; detecting the timing at which the first video head finishes tracing the final video track in response to the detection of the final video track; and detecting the timing at which the first video head finishes tracing the final video track; A splicing method for a video tape recorder, characterized in that supply of video signals to first and second video heads is restarted. 2. The first and second video heads, which sequentially record the video signal of each field as a diagonal video track on a magnetic tape, or reproduce the video signal of each field sequentially from there, are arranged on a rotating disk at an interval of 180°. an auxiliary head disposed on the rotating disk at a predetermined distance from the first and second video heads; recording pause means for generating a recording pause signal until the recording pause operation is released in response to a given recording pause operation; and recording pause means for generating a recording pause signal by the first video head in response to the recording pause signal. ) from the time when the recording of the first and second
recording/mute means for stopping the supply of video signals to the video head of the video head; means for rewinding the magnetic tape for a predetermined period from the time when recording of the video track (final video track) is completed; means for running the magnetic tape in a forward direction in response to the disappearance of the recording pause signal after the recording pause signal is removed; and a means for tracing a video track while the magnetic tape is running in the forward direction; a final video track detecting means for detecting the final video track based on a level of a reproduction output signal of an auxiliary head; the final video track is detected by the final video track detecting means, and the first video head detects the final video track; A video tape recorder comprising: recording mute canceling means for controlling said recording muting means and restarting the supply of video signals to said first and second video heads when tracing a video track is completed. A splicing device for. 3. The video tape recorder according to claim 2, wherein the auxiliary head is arranged on the rotary disk at an interval of 90 degrees with respect to the first and second video heads. A splicing device for 4. The videotape according to claim 2 or 3, wherein the auxiliary head is one of two video heads for special playback provided on the rotary disk. A splicing device for recorders.