JPH07176170A - Video editing device - Google Patents

Abstract

PURPOSE:To obtain a video editing device with which a highly accurate edition in a frame unit can be performed in a short time with a easy control. CONSTITUTION:This device is provided with first and second video signal input parts 21, 22 with which a VTR1 and a VTR2 are connected respectively, a switching means 27 switching input videos of respective input parts 21, 22, a video signal output part 28 supplying a video signal switched by the switching means 27 to a VTR 61 and a control means 31 performing the switching control of the switching means 27 and controls of respective VTRs 1, 2, 6. VTRs 1, 2 are reproduced and selected properly by the switching means 27 and selected video signal is recorded on the VTR 6 under the control of the control means 31. Further, this device is provided with a memory means 34 storing absolute rise delay times of respective VTRs 1, 2, 6 and when respective VTRs 1, 2, 6 are made to operate, actuating timings are set by considering absolute rise delay time data stored in the memory.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to, for example, a plurality of VTRs.
The present invention relates to a video editing device suitable for connecting a (video tape recording / playback device) and editing a video tape.

[0002]

2. Description of the Related Art Conventionally, when a video signal reproduced from a plurality of VTR video tapes is edited and recorded on one VTR video tape, for example, a video editing apparatus having a system configuration shown in FIG. Had been used. In FIG. 5, reference numerals 1 and 2 represent the first and second playback side VTRs, and the playback timing from the video tape in the first and second playback side VTRs 1 and 2 is determined by the controller 7 that controls the entire editing. It is controlled.

Then, the video signal V1 output from the first reproducing VTR1 is supplied to the video effector 3.
Under the control of the controller 7, the video effector 3 performs a process of adding a special effect to an image as necessary (hereinafter referred to as an effect process). Then, the video signal output from the video effector 3 is supplied to the video switcher 4. Further, the video signal V2 output from the second reproduction side VTR2 is supplied to the video switcher 4.

Then, the video switcher 4 appropriately switches the video signals of the two systems based on the control of the controller 7 into the edited video signal V3 of one system, and supplies the video signal V3 to the recording side VTR6. Record on videotape. The recording operation in the recording-side VTR 6 is also performed under the control of the controller 7. Further, depending on the system configuration, as shown by the broken line in FIG. 5, a process of supplying the video signal V2 output from the second reproduction side VTR2 to the video effector 3 and synthesizing the two systems of video signals V1 and V2 may also be performed. To do.

The video signal V1 output from the first reproduction side VTR1 is supplied to the first sub-monitor 11 to be displayed, and the video signal V2 output from the second reproduction side VTR2 is changed to the first video signal V2. It is supplied to the second sub monitor 12 for display. In addition, the video signal V output by the video switcher 4
3 is supplied to the main monitor 13 to be displayed.

Then, the audio signal A1 output from the first reproducing side VTR1 and the audio signal A2 output from the second reproducing side VTR2 are supplied to the audio mixer 5, and under the control of the controller 7, 2 System audio signals A1, A2
Is mixed into one system of audio signal A3. Then, the synthesized audio signal A3 is supplied to the recording-side VTR 6 and recorded on the video tape.

Then, the time code data of the video tapes attached to the respective reproduction side VTRs 1 and 2 and the recording side VTR 6 is transmitted to the controller 7, and this controller 7
The reproduction position and the recording position are determined based on the time code supplied in step S1, and the reproduction operation and the recording operation of each VTR 1, 2, 6 are controlled. Therefore, the VTRs 1, 2 and 6 and the controller 7 are connected so that bidirectional communication is possible. For this connection, a standard communication interface such as RS-232C is used.

The processing in the video effector 3, the video switcher 4, and the audio mixer 5 is performed in each processing device 3, 4, 5 when the time code of the VTR corresponding to the controller 7 becomes the edit point code. A control command for starting is transmitted and processing is started.

The video effector 3, the video switcher 4, the audio mixer 5, and the controller 7 are usually formed as separate bodies, and each has a built-in controller formed by a microcomputer. A personal computer may be used as the controller 7.

Using the editing system thus constructed, the recording-side VTR 6 is based on the video material recorded on the video tapes mounted on the two reproducing-side VTRs 1 and 2.
The edited video program can be recorded on the video tape attached to the.

[0011]

By the way, when editing with such a system configuration, each connected VT is connected.
It is necessary to operate R1, 2, and 6 in a precisely synchronized state. That is, when performing editing with such an editing device, it is necessary to accurately set an editing point in units of one frame and perform the editing process. Therefore, in order to accurately control the reproducing operation and the recording operation of each VTR 1, 2, 6 in units of one frame, the tape running on the reproducing side and the recording side is started from several seconds to several tens of seconds before the editing point. The tape speed is controlled so that the tape running is synchronized so that the frame is synchronized when the tape running position reaches the edit point.

The editing process under such control is called pre-roll editing. In order to match the editing points in this pre-roll editing, the controller is complicated in order to strictly control the tape running state of each VTR 1, 2 or 6. It is necessary to control the running speed and the load on the controller side is heavy, and it is necessary to start the tape running well before the editing point, and it takes time to start the editing operation actually recorded on the tape. However, there is an inconvenience that the time required for editing is long.

An object of the present invention is to provide a video editing apparatus capable of performing highly accurate editing in frame units with a simple control in a short time.

[0014]

According to the present invention, for example, as shown in FIG. 1, a first video signal input section 21 to which a first video signal reproducing means 1 is connected, and a second video signal reproducing means. Two
A second video signal input section 22, a switching means 27 for switching the video signals obtained in the respective video signal input sections 21 and 22, and a video signal which outputs the video signal switched by the switching means 27. The video signal output unit 28 to which the recording unit 6 is connected, the switching control of the switching unit 27, and the first and second
The control means 31 for controlling the reproduction of the video signal reproducing means 1 and 2 and the recording control of the video signal recording means 6 is provided, and by the control of the control means 31, the first and second video signal reproducing means 1, In the video editing apparatus in which the video signal at a predetermined location is reproduced from 2 and selected by the switching means 27, and the selected video signal is recorded by the video signal recording means 6, the reproducing means 1, 2 and the recording means 6 are provided. The storage means 34 for storing the absolute rising delay time of the above is provided, and when the control means 31 activates the first and second video signal reproducing means 1, 2 or the video signal recording means 6, the storage means 6 stores them. The operation timing is set in consideration of the absolute rising delay time data thus obtained.

Further, in the above-mentioned case, when any two of the first and second video signal reproducing means 1 and 2 and the video signal recording means 6 are operated, the absolute value stored in the storage means 34 is stored. Based on the rising delay time data, the control means 31 determines the relative difference between the rising delay times of the two units, and originally controls the timing at which one of the reproducing means or the recording means is operated by the determined relative difference. It is designed to operate earlier than the set timing.

When any one of the first and second video signal reproducing means 1 and 2 and the video signal recording means 6 is operated in the above-mentioned case, the absolute value stored in the storage means 34 is used. The timing for activating the reproducing means or the recording means by the amount indicated by the rise delay time data is set to be earlier than the timing originally set for control.

In addition, a counter 33 for measuring the reference time in the above-mentioned case is provided, and the count signal of this counter and the first and second video signal reproducing means 1 and 2 and the video signal recording means 6 are supplied. The absolute rising delay time data is detected from the difference between the time code signal and the time code signal to be stored in the storage means 34.

[0018]

According to the present invention, since the reproducing operation and the recording operation are controlled in consideration of the absolute rising delay time of the connected video signal reproducing means and video signal recording means, it is possible to cope with the difference in the rising delay time. By performing the control, it is easy to accurately synchronize the reproducing means and the recording means at the time when the edit point is reached.

Further, when any two reproducing means or recording means are operated in the above-mentioned case, the timing for operating one reproducing means or recording means by the relative difference between the rising delay times of these two means, By actuating earlier than the timing originally set to control, the reproduction position or recording position of the two reproducing means or the recording means becomes the accurately set position when the edit point is reached, and Editing processing can be performed by accurately synchronizing the reproducing means or the recording means.

When any one of the reproducing means or the recording means is operated in the above-mentioned case, the timing for operating the reproducing means or the recording means is originally controlled by the amount indicated by the absolute rising delay time data. By actuating earlier than the timing set so that, for example, when one reproducing means is already performing the reproducing operation, when another reproducing means is operated later, an absolute rising delay is generated. The two units can be easily synchronized by operating them as quickly as indicated by the time data.

Further, in the above-mentioned case, the absolute rise delay time data is detected and stored from the difference between the count signal of the counter and the time code signal supplied from each reproducing means and recording means. Absolute rise delay time data can be obtained by simple processing within the device.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 4, parts corresponding to those in FIG. 5 described in the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 is a diagram showing the structure of the video editing apparatus of this embodiment and its surroundings. In the figure, reference numeral 20 denotes the entire video editing apparatus. This video editing apparatus 20 adds a special effect to a supplied video signal. Function as an effector, a function as a switcher for switching a plurality of input images, a function as an audio mixer for changing the mixed state of a plurality of input sounds, and a function as an editing controller for controlling the operation of a connected VTR. As shown in FIG. 2, the video switcher section 20a and the VTR control section 20 are provided on the front surface of one editing apparatus 20, as shown in FIG.
b, audio mixer section 20c, and time code display section 3
And 5 are arranged. The video editing apparatus 20 of this example, as shown in FIG.
1, 2 and one recording side VTR 6 are connected.

The structure of the video editing apparatus 20 will be described. The video signals reproduced from the first and second reproduction side VTRs 1 and 2 are supplied to different video signal input terminals 2 respectively.
The video signals supplied to the input terminals 21 and 22 and supplied to the input terminals 21 and 22 are supplied to the fixed contacts of the changeover switches 23 and 24, respectively. Then, by switching the movable contacts of the changeover switches 23 and 24, the video signal supplied from the first VTR 1 and the video signal supplied from the second VTR 2 are switched. This switching is controlled by the system controller 31 of the editing device 20.

Then, the video signal selected by the changeover switch 23 is supplied to the first frame memory 25, and the video signal selected by the changeover switch 24 is supplied to the second frame memory 26. This each frame memory 2
Reference numerals 5 and 26 are for performing effect processing for adding a special effect to a video signal. For example, the screen is divided into a plurality of screens, a mosaic image is displayed, the color of the image is changed, and the like. Various processing can be performed. This effect processing is controlled by the system controller 31. However, the video signal may be directly output from the frame memory without effect processing.

Then, the video signals output from the frame memories 25 and 26 are supplied to the switcher section 27. The switcher unit 27 performs a process of selecting and outputting any one of the supplied video signals of two systems (in some cases, synthesizing and outputting the video signals of two systems). The output video signal is selected under the control of the controller 31. And this switcher unit 2
The video signal selected in 7 is supplied to the video signal output terminal 28, and is supplied to the recording side VTR 6 connected to this output terminal 28.

Next, the configuration around the system controller 31 of the video editing apparatus 20 will be described. The system controller 31 of this example is composed of a microcomputer, and the operation information of the operation keys 32 arranged on the front surface of the apparatus is displayed. It is supplied and various controls are performed based on the operation of the operation key 32. In addition, this system controller 3
A time code counter 33 and a memory 34 are connected to 1. The time code counter 33 is a circuit which internally has a reference synchronization pulse generating means and counts the generated synchronization pulses to generate time code data.
The obtained time code data is used by the system controller 3
Supply to 1. Further, the memory 34 stores data required for control such as data of set edit points, and the system controller 31 can read the stored data as needed.

Further, in this example, rise delay time data of each VTR 1, 2, 6 connected to the memory 34 is stored. The rise delay time data will be described later.

The system controller 31 has
A time code display unit 35 is connected to display the time code of each VTR.

Each V connected to the editing device 20
The control terminals of the TRs 1, 2, and 6 are connected to the communication terminal 36 of the editing device 20, and control commands are issued from the system controller 31 to the VTRs 1, 2, and 6 via the communication terminal 36.
6 can be supplied. By transmitting this control command, the recording / reproducing operation of each VTR 1, 2, 6 is performed.
Further, the time code data of the video tape loaded in each VTR is supplied from each VTR 1, 2, 6 side to the system controller 31 through the communication terminal 36.

Then, in the system controller 31,
The time code of each VTR supplied is displayed on the time code display section 35, and the time code of each VTR is determined to control recording and reproduction. Here, in this example, when the video tape is raised from the standby state to the reproduction state or the recording state in order to control the recording or reproduction, the rise delay time data stored in the memory 34 is used. Therefore, the control timing is slightly advanced. Specific control using this rise delay time data will be described later.

Although not shown in the figure, the structure of the mixer for the audio signals is such that the audio signals reproduced from the reproduction side VTRs 1 and 2 are mixed and supplied to the recording side VTR 6.

Next, the operation when the editing process is performed using the editing apparatus of this example will be described. First, in the case of this example,
It is necessary to store absolute rise delay time data in each of the connected VTRs 1, 2, and 6 as an initial setting.
The storage process of the absolute rise delay time data will be described with reference to FIG. 3. At the time of the storage process, a video tape on which a video signal is recorded is attached to each of the connected VTRs 1, 2 and 6, and the system controller 31 is connected. Under the control of (1), the running state of the video tape of each VTR 1, 2, 6 is set to the standby state (that is, the pause state in which the reproduction can be started immediately). At this time, the time code data (that is, the data indicating the running stop position of the video tape) supplied from each VTR 1, 2, 6 to the system controller 31 is
It is temporarily stored in the RAM in the controller 31.

Next, the system controller 31 sends a command to the VTRs 1, 2 and 6 to simultaneously release the standby mode and start reproduction (point a in FIG. 3). At this time, at the same time, the system controller 31 determines the time code counted by the time code counter 33 connected to the system controller 31. By transmitting this standby release command, each VTR1,
The video tapes mounted in Nos. 2 and 6 immediately start running to reproduce the video signal.

When the time code counted by the time code counter 33 becomes the time code at the point b, which is 3 seconds after the time code at the point a, as shown in A of FIG. VTR1,
After judging the time code supplied from 2 and 6, each V
A command to stop the reproduction is transmitted to TR1, 2, and 6.

Then, the time code of each VTR 1, 2, 6 at point b is compared with the time code of each VTR 1, 2, 6 in standby (that is, at point a) temporarily stored in the controller 31, A from time code for each VTR
Calculate the elapsed time from point to point b. Where each VTR
Since it takes some time for the traveling speeds of 1, 2, and 6 to rise to 1 × speed, the obtained elapsed time becomes shorter than 3 seconds, and the difference between the obtained elapsed time and 3 seconds The time is stored in the memory 34 as absolute rising delay time data of each VTR 1, 2, 6.

As described above, the absolute rising delay times stored in the memory 34 are different for each unit as shown in B, C and D of FIG. 3, and normally different values are stored. It By storing the absolute rise delay time data in the memory 34 in this way, the editing device 2
The initial setting of 0 is completed.

Although the initial setting is performed simultaneously for the three units here, the initial setting may be performed by running the tapes one by one individually. Also, any one VT
When only R is changed to another VTR, or when another VTR is newly added and connected, this newly connected VT
Only the absolute rise delay time data of R is measured, and the data stored in the memory 34 is updated.

Next, the operation in the case of performing the editing operation in the video editing apparatus 20 thus initialized will be described with reference to FIG.

Here, at the first editing point (denoted as IN point IN1), the processing for recording the video material P1 reproduced from the first reproducing side VTR1 on the recording side VTR6 is started. Then, at the second edit point (denoted as IN point IN2),
The video material P2 reproduced from the second reproduction side VTR2 is gradually switched to be recorded in the recording side VTR6. And the third
At the edit point (out point OUT1) of, the recording on the recording side VTR 6 is stopped. The data of the time code positions of the IN points IN1, IN2 and OUT point OUT1 are stored in the memory 34 by a predetermined operation of the operation keys 32. When the process of switching the video material P1 to the video material P2 is performed on the way, the video material P1 is stored in the FROM.
The video material P2 is referred to as a source, and the video material P2 is referred to as a TO source.

A state in which such editing is performed will be described below. In the case of the video editing apparatus 20 of this example, preroll editing is performed, so that a VTR corresponding to about 5 seconds before each IN point IN1 and IN2 is set. Operate, IN point IN
When passing through 1 and IN2, VTRs on both reproducing side and recording side
Make sure the tape running is stable. That is, A in FIG.
B and C are the playback states of the first playback VTR 1,
In the figure showing the reproduction state of the second VTR 2 and the recording state of the recording side VTR 6, first the first reproduction side VTR 1 and the recording side VT
R6 and time t1, t from the respective IN points IN1
The tape running is started from the position 2 before, and the IN point IN
Run the pre-roll until it reaches 1.

Here, in the case of the editing apparatus of this example, the preroll time is basically set to 5 seconds, and the times t1 and t2 are set.
Also, although it is originally 5 seconds, one of the times t1 and t2 is adjusted using the rising delay time stored in the memory 34. That is, the system controller 31
However, the absolute rising delay time of the first reproducing VTR 1 stored in the memory 34 and the absolute rising delay time of the recording VTR 6 are judged to detect the difference between the two delay times. And the VT with the longer rise delay time
Time for pre-roll running R1 or 6 (t1 or t
2) is made longer than 5 seconds by the difference between the both delay times (that is, it is activated earlier by the difference between the both delay times).

For example, if the rising delay time of the recording-side VTR 6 is longer than the rising delay time of the first reproducing-side VTR 1 by time t ₀ , the recording side starts from (5 seconds + t ₀ ) before the IN point IN1. The system controller 31 sends a command for pre-rolling the VTR 6 and the command system controller 31 for pre-rolling the first playback VTR 1 from 5 seconds before the IN point IN1.

By adjusting the pre-roll running time in this way, the tape running of both VTRs 1 and 6 is synchronized, and when the IN point IN1 is reached, each VTR is moved.
The traveling positions of TR1 and TR6 become the position of the time code accurately set as the IN point IN1, and the reproduction and recording of the video material P1 (FROM source) are performed from the IN point IN1.

When the video material P1 is recorded, the next IN point IN2 is reached, and the second reproduction side VTR2 is reached.
The recording is switched to the recording of the video material P2 reproduced from, but the second reproduction side VTR2 is also about 5 times the IN point IN2.
The pre-roll running is started from a second before, and is synchronized with the tape running of the other VTRs 1 and 6. In this case, the system controller 31 stores the memory 34 in the pre-roll running time t3.
The absolute rising delay time of the second reproducing VTR 2 stored in the above is judged, and the time t3 for running the pre-roll for longer than 5 seconds is set by this delay time. Therefore, the system controller 31 sends a command for prerolling the second reproducing VTR 2 earlier than the absolute rising delay time of 5 seconds to cause the prerolling.

By doing so, the second reproduction side VT
When the tape running position of R2 reaches the IN point IN2,
This tape running becomes synchronized with the other VTRs 1 and 6 on which stable tape running is already performed, and the IN point IN
Switching from 2 to video material P2 and subsequent video material P
The recording on the recording side VTR 6 of No. 2 is accurately synchronized and excellently performed.

When the OUT point OUT1 is reached, the recording on the recording VTR 6 is stopped and the OUT point OU is reached.
The post-roll running of each of the reproduction side VTRs 1 and 2 is performed for a time t4 from T1 to set each of the VTRs 1, 2 and 6 to the standby state. The time t4 for this post-roll running is, for example, 2 seconds.

As described above, when the video material is edited using the editing apparatus of this embodiment, when two VTRs are started to run simultaneously, the absolute rising delay time of the two VTRs is Due to the difference, one VTR is started to run earlier and pre-rolled, and the other VTR already running
In order to start the traveling of one VTR in order to synchronize with each other, the traveling speed of each VTR is slightly reduced during the pre-roll traveling because the traveling is started early and the pre-roll traveling is performed by the absolute rising delay time of the VTR. Even without adjustment, the traveling position of each VTR becomes the position of the accurately set time code at the editing point (IN point), and highly accurate editing in 1 frame units can be realized by simple control. In addition, even if the traveling speed of each VTR is not finely adjusted during the pre-roll traveling as described above, the traveling position of each VTR is automatically set to the set position at the edit point (IN point), which is necessary for the pre-roll traveling. The time required for editing can be shortened.

Even in the case of this example, the traveling speed of each VTR may be finely adjusted during the pre-roll traveling so that the synchronization control can be performed more accurately.

Further, in the above-mentioned embodiment, two reproducing VTRs are used.
However, the number of playback-side VTRs and recording-side VTRs may be increased. Further, a video recording device or a video reproducing device other than the VTR (for example, a recording / reproducing device using a video disk as a recording medium) may be used.

[0051]

According to the present invention, since the reproducing operation and the recording operation are controlled in consideration of the absolute rise delay time of the connected video signal reproducing means and video signal recording means, it is possible to cope with the difference in the rise delay time. By performing the controlled
When the editing point is reached, the reproducing means and the recording means can be easily synchronized accurately, and accurate control can be easily performed.

Further, when any two reproducing means or recording means are operated in the above-mentioned case, the timing of operating one reproducing means or recording means by the relative difference between the rising delay times of the two is By actuating earlier than the timing originally set to control, the reproduction position or recording position of the two reproducing means or the recording means becomes the accurately set position when the edit point is reached, and Edit processing can be performed by accurately synchronizing the reproducing means or the recording means.
Editing that sets edit points on a frame-by-frame basis becomes easier.

Further, when any one of the reproducing means or recording means is operated in the above-mentioned case, the timing for operating this reproducing means or recording means is originally controlled by the amount indicated by the absolute rise delay time data. By actuating earlier than the timing set so that, for example, when one reproducing means is already performing the reproducing operation, when another reproducing means is operated later, an absolute rising delay is generated. You can easily synchronize these two units by operating them as fast as the time data shows.
Editing that sets an editing point in units of one frame can be easily performed.

Further, in the above-mentioned case, the absolute rise delay time data is detected and stored from the difference between the count signal of the counter and the time code signal supplied from each of the reproducing means and the recording means. Absolute rising delay time data can be obtained by simple processing in the device, and preparation for performing control based on the rising delay time data can be easily performed.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a configuration of an editing apparatus and its periphery according to an embodiment of the present invention.

FIG. 2 is a plan view showing the outer appearance of the editing apparatus according to the embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a rise time measurement state according to an embodiment.

FIG. 4 is an explanatory diagram showing an operating state of each VTR according to an embodiment.

FIG. 5 is a block diagram showing a conventional editing system.

[Explanation of symbols]

 1 First Playback Side VTR 2 Second Playback Side VTR 6 Recording Side VTR 20 Video Editing Device 21, 22 Video Signal Input Terminal 25 First Frame Memory 26 Second Frame Memory 27 Switcher Section 28 Video Signal Output Terminal 31 System controller 32 Operation keys 33 Time code counter 34 Memory 35 Time code display section 36 Communication terminal

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication H04N 5/782 A

Claims (4)

[Claims] 1. A first video signal input section to which a first video signal reproducing means is connected, a second video signal input section to which a second video signal reproducing means is connected, and the respective video signals. Switching means for switching the video signal obtained at the input portion, a video signal output portion for outputting the video signal switched by the switching means and connected to the video signal recording means, switching control of the switching means and the first and the first A control means for controlling reproduction of the second video signal reproducing means and recording control of the video signal recording means is provided, and by the control of the control means, a predetermined portion from the first and second video signal reproducing means is provided. In the video editing apparatus which reproduces the video signal of, and selects it by the switching means, and records the selected video signal by the video signal recording means, the absolute rising delay time of each of the reproducing means and the recording means is set. A storage means for storing is provided, and when the control means operates the first and second video signal reproducing means or the video signal recording means, the absolute rise delay time data stored in the storage means is considered. Then, the video editing device that sets the operation timing. 2. When operating any two of the first and second video signal reproducing means and the video signal recording means, the absolute rising delay time data stored in the storage means The relative difference between the rising delay times of the two units is discriminated by the control means, and the timing at which one of the reproducing means or the recording means is operated by the discriminated relative difference is set to be originally controlled. The video editing apparatus according to claim 1, wherein the video editing apparatus is adapted to operate faster than before. 3. The absolute rising delay time data stored in the storage means when operating any one of the first and second video signal reproduction means and the video signal recording means. 2. The video editing apparatus according to claim 1, wherein the timing for operating the reproducing means or the recording means is made to operate earlier than the timing originally set to be controlled by the amount corresponding to the above. 4. A counter for measuring a reference time is provided, and from the difference between the count signal of this counter and the time code signals supplied from the first and second video signal reproducing means and the video signal recording means. 2. The video editing apparatus according to claim 1, wherein absolute rising delay time data is detected and stored in the storage means.