JP3307039B2 - Video editing equipment - Google Patents

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 apparatus suitable for editing a video tape by connecting a video tape recording / playback apparatus.

[0002]

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

[0005] A video signal V 1 output from the first reproducing side VTR 1 is supplied to a video effector 3.
The video effector 3 performs processing (hereinafter referred to as effect processing) for adding a special effect to an image as needed based on the control of the controller 7. 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 VTR 2 is supplied to the video switcher 4.

[0004] The video switcher 4 appropriately switches the two video signals under the control of the controller 7 to provide one edited video signal V3. The video signal V3 is supplied to the recording side VTR 6. Record on videotape. The recording operation on the recording side VTR 6 is also performed based on the control of the controller 7. In addition, depending on the system configuration, as shown by the broken line in FIG. 5, the video signal V2 output from the second playback-side VTR 2 is also supplied to the video effector 3, and the process of synthesizing the two-system video signals V1 and V2 is performed. Do.

[0005] 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 converted to the second video signal. The data is supplied to the second sub monitor 12 and displayed. Also, the video signal V output from the video switcher 4
3 is supplied to the main monitor 13 and displayed.

An audio signal A1 output from the first reproducing VTR 1 and an audio signal A2 output from the second reproducing VTR 2 are supplied to the audio mixer 5, and based on the control of the controller 7, System audio signals A1, A2
Is mixed with the audio signal A3 of one system. Then, the synthesized audio signal A3 is supplied to the recording side VTR 6 and recorded on a video tape.

[0007] Then, the controller 7 transmits the time code data of the video tape mounted on each of the reproducing VTRs 1 and 2 and the recording VTR 6 to the controller 7.
The playback position and the recording position are determined on the basis of the time code supplied in the step (1), and the playback operation and the recording operation of each VTR 1, 2, and 6 are controlled. Therefore, the VTRs 1, 2, 6, and the controller 7 are connected so that bidirectional communication is possible. For this connection, for example, a communication interface of a standard such as RS-232C is used.

The processing by the video effector 3, video switcher 4, and audio mixer 5 is performed by the processing devices 3, 4, 5 when the time code of the VTR corresponding to the controller 7 becomes the code of the edit point. Is transmitted, and the process is started.

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

Using the editing system configured as described above, the recording-side VTR 6 based on the video material recorded on the video tape mounted on the two reproducing-side VTRs 1 and 2.
The edited video program can be recorded on a video tape attached to the PC.

[0011]

However, when editing is performed with such a system configuration, each connected VT
It is necessary to operate R1,2,6 in a precisely synchronized state. That is, when editing is performed by such an editing apparatus, it is necessary to set an editing point accurately for each frame and perform the editing process. For this reason, in order to accurately control the reproduction operation and recording operation of each of the VTRs 1, 2, and 6 in units of one frame, the tape running on the reproduction side and the recording side is started 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 running position of the tape reaches the editing point.

The editing process by such control is called pre-roll editing. In order to match the editing point in this pre-roll editing, the controller is complicated because the tape running state of each of the VTRs 1, 2, 6 is strictly controlled. It is necessary to control the running speed, and the load on the controller is large, and it is necessary to start the tape running considerably before the editing point, and it takes time until the editing operation actually recorded on the tape is started. And the time required for editing becomes longer.

SUMMARY OF THE INVENTION An object of the present invention is to provide a video editing apparatus capable of performing high-accuracy editing in units of frames in a short time with simple control.

[0014]

According to the present invention, as shown in FIG. 1, for example, 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. 2
Are connected, a switching means 27 for switching the video signals obtained to the respective video signal input sections 21 and 22, and a video signal switched by the switching means 27 to output the video signal. A video signal output unit 28 to which the recording unit 6 is connected, switching control of the switching unit 27, and first and second
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. The control of the control means 31 controls the first and second video signal reproducing means 1 and 2. In a video editing apparatus for reproducing a video signal at a predetermined position from 2 and selecting the video signal by the switching means 27 and recording the selected video signal by the video signal recording means 6, a counter 33 for measuring a reference time is provided. and a storage unit 34 for storing the absolute rise delay time of each reproducing means 1, 2 and the recording means 6 is provided, the control means 31,
The count signal of the counter 33 and the first and second video signals
Supplied from reproduction means 1 and 2 and video signal recording means 6
Absolute rise delay due to difference from time code signal
The time data is detected and stored in the storage means 34. When the control means 31 operates the first and second video signal reproducing means 1 and 2 or the video signal recording means 6, the time data is stored in the storage means 6. The operation timing is set in consideration of the absolute rise delay time data.

In the case described above, when any one of the first and second video signal reproducing means 1 and 2 and the video signal recording means 6 is operated, the absolute value stored in the storage means 34 is stored. Based on the rise delay time data, a relative difference between the two rise delay times is determined by the control means 31, and the timing for operating one of the reproducing means or the recording means by the determined relative difference is originally controlled. The operation is performed earlier than the set timing.

In the case described above, when any one of the first and second video signal reproducing means 1 and 2 and the video signal recording means 6 is operated, the absolute value stored in the storage means 34 is stored. The timing at which the reproducing means or the recording means is operated by the amount indicated by the rise delay time data is made earlier than the timing originally set to control.

[0017]

[0018]

According to the present invention, 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. By performing the control, it is easy to accurately synchronize the reproducing means and the recording means at the point of the edit point. In particular, the count signal of the counter
And a time code supplied from each reproducing means and recording means.
Absolute rise delay time data from the difference
By detecting and storing the
To obtain absolute rise delay time data
Wear.

In operating the two reproducing means or the recording means in the above-described case, the timing for operating one of the reproducing means or the recording means is determined by the relative difference between the rising delay times of the two. By operating earlier than the timing originally set to control, when the edit point is reached, the reproduction position or recording position of the two reproducing means or recording means becomes exactly set, so that the two Editing processing can be performed by accurately synchronizing the reproducing means or the recording means.

Further, when any one of the reproducing means or the recording means is operated in the case described above, the timing at which this reproducing means or the recording means is operated is controlled by the amount indicated by the absolute rise delay time data. By performing the operation earlier than the set timing, for example, when the reproducing operation is already performed by one reproducing unit, when the other reproducing unit is operated later, the absolute rising delay is caused. The two units can be easily synchronized by operating them as early as indicated by the time data.

[0021]

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In FIGS. 1 to 4, portions corresponding to 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 configuration of the video editing apparatus of this embodiment and its peripherals. In FIG. 1, reference numeral 20 denotes the entire video editing apparatus. This video editing apparatus 20 adds a special effect to a supplied video signal. A function as an effector, a function as a switcher for switching a plurality of input images, a function as an audio mixer for changing a mixed state of a plurality of input audios, and a function as an editing controller for controlling the operation of a connected VTR. As shown in FIG. 2, a video switcher section 20a and a VTR control section 20 are provided on the front of one editing apparatus 20 as shown in FIG.
b, audio mixer section 20c and time code display section 3
5 are arranged. Then, as shown in FIG. 1, the video editing apparatus 20 of the present example has two playback-side VTRs.
1, 2 and one recording side VTR 6 are connected.

The configuration 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 separate video signal input terminals 2 respectively.
Video signals supplied to input terminals 21 and 22 and supplied to input terminals 21 and 22 are supplied to fixed contacts of changeover switches 23 and 24, respectively. 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 respective frame memory 2
Reference numerals 5 and 26 are for performing an effect process for adding a special effect to a video signal. For example, a multi-screen which divides a screen into a plurality, a mosaic-like video, a color of a video 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.

The video signals output from the frame memories 25 and 26 are supplied to the switcher unit 27. In the switcher unit 27, a process of selecting and outputting any one of the supplied two video signals (in some cases, combining and outputting the two video signals) is performed. The output video signal is selected based on the control of the controller 31. And this switcher unit 2
The video signal selected at 7 is supplied to a video signal output terminal 28 and supplied to the recording VTR 6 connected to the 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 the present embodiment is constituted by a microcomputer, and the operation information of the operation keys 32 arranged on the front of the apparatus is stored. Various controls are performed based on the operation of the operation keys 32. Also, this system controller 3
1, a time code counter 33 and a memory 34 are connected. The time code counter 33 is a circuit that 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 transferred to the system controller 3
Feed to 1. The memory 34 stores data necessary for control such as data of the set edit point, and the system controller 31 can read the stored data as needed.

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

Then, the system controller 31 includes:
A time code display 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 apparatus 20, and control commands are sent from the system controller 31 via the communication terminal 36 to each of the VTRs 1, 2, and 6.
6 can be supplied. By transmitting the control command, the recording / reproducing operation of each of the VTRs 1, 2, and 6 is performed.
In addition, the time code data of the video tape mounted on each VTR is supplied from the VTRs 1, 2, 6 via the communication terminal 36 to the system controller 31.

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

Although the configuration of the audio signal mixer section is not shown, 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 editing processing is performed using the editing apparatus of this embodiment will be described. First, in the case of this example,
It is necessary to store absolute rising 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 Control, the running state of the video tape of each of the VTRs 1, 2, and 6 is set to a standby state (that is, a pause state in which reproduction can be started immediately). At this time, the time code data (that is, the data indicating the video tape stop position) supplied from each of the VTRs 1, 2, and 6 to the system controller 31 is
It is temporarily stored in the RAM in the controller 31.

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

When the time code counted by the time code counter 33 becomes the time code at point b three seconds after the time code at point a, as shown in FIG. VTR1,
After determining the time code supplied from 2, 6
A command to stop reproduction is transmitted to TRs 1, 2, and 6.

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

The absolute rising delay time stored in the memory 34 in this way differs from one vehicle to another as shown in FIGS. 3B, 3C, and 3D, and usually different values are stored. You. By storing the absolute rise delay time data in the memory 34 in this manner, the editing device 2
The initialization of 0 is ended.

Here, the initial setting is performed simultaneously for the three units, but the initial setting may be performed by running the tape individually for each unit. Also, any one VT
If the R is changed to another VTR, or if another VTR is newly added and connected, the newly connected VT
Only the absolute rising delay time data of R is measured, and the data stored in the memory 34 is updated.

Next, the operation of the video editing apparatus 20 that has been initialized as described above to perform an editing operation will be described with reference to FIG.

Here, at the first editing point (referred to as the IN point IN1), a process of recording the video material P1 reproduced from the first reproducing VTR 1 on the recording VTR 6 is started. Then, at the second editing point (referred to as IN point IN2),
The video material P2 reproduced from the second reproduction side VTR 2 is gradually switched to be recorded on the recording side VTR 6. And the third
At the edit point (out point OUT1), the recording on the recording side VTR 6 is stopped. The data of the time code position of each of the in points IN1, IN2, and the out point OUT1 is stored in the memory 34 by a predetermined operation of the operation key 32. When the process of switching from the video material P1 to the video material P2 is performed on the way, the video material P1 is
The video material P2 is called a TO source.

The state in which such editing is performed will be described below. In the case of the video editing apparatus 20 of the present embodiment, since the pre-roll editing is performed, the VTR corresponding to each of the in-points IN1 and IN2 from about 5 seconds before is set. Activate the IN point IN
VTRs on both the playback and recording sides when passing through IN1 and IN2
So that the tape running is stable. That is, in FIG.
B and C represent the playback state of the first playback-side VTR 1, respectively.
FIG. 3 is a diagram showing a reproduction state of a second VTR 2 and a recording state of a recording side VTR 6, where a first reproducing side VTR 1 and a recording side VT
R6 and the time points t1 and t
Start the tape running from the position two times before, and
Run the pre-roll until it becomes 1.

Here, in the case of the editing apparatus of this example, the preroll time is basically 5 seconds, and the times t1 and t2
Is originally 5 seconds, but one of the times t1 and t2 is adjusted using the rise delay time stored in the memory 34. That is, the system controller 31
Determines 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, and detects the difference between the two delay times. And the VT with the longer rise delay time
R1 or 6 is pre-roll traveling time (t1 or t
2) is made longer than 5 seconds by the difference between the two delay times (that is, is activated earlier by the difference between the two delay times).

For example, assuming that 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 the time t ₀ , (5 seconds + t ₀ ) before the in point IN1. A command to make the VTR 6 pre-roll travel is sent from the system controller 31 and also from five seconds before the in-point IN1 from the command system controller 31 to make the first reproducing VTR 1 pre-roll travel.

By adjusting the pre-roll running time in this way, the tape running of the two VTRs 1 and 6 is synchronized, and when the in-point IN1 is reached, each VTR is driven.
The travel positions of the TRs 1 and 6 are exactly the time code positions 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 recording of the video material P1 is performed, the next in-point IN2 is reached, and the second playback-side VTR 2
The recording is switched to the recording of the video material P2 reproduced from the second reproduction side VTR2.
The pre-roll running is performed from the beginning of the second and synchronized with the tape running of the other VTRs 1 and 6. In this case, the time t3 for the pre-roll traveling is determined by the system controller 31 in the memory 34.
Is determined based on the absolute delay time of the rise of the second reproduction-side VTR 2 stored in the storage section, and a time t3 for performing the pre-roll traveling longer than 5 seconds by this delay time is set. Therefore, the system controller 31 sends a command to cause the second reproducing-side VTR 2 to perform pre-roll traveling earlier than 5 seconds by the absolute rising delay time, and performs pre-roll traveling.

By doing so, the second reproduction side VT
When the tape running position of R2 becomes the in point IN2,
This tape running is synchronized with the other VTRs 1 and 6 in which stable tape running is already performed, and the IN point IN
2 to the video material P2 and the subsequent video material P
Recording on the recording side VTR 6 is accurately performed in synchronization with each other.

When the out point OUT1 is reached, the recording on the recording side VTR 6 is stopped, and the out point OU is output.
The reproduction side VTRs 1 and 2 are post-rolled for a time t4 from T1 to bring the respective VTRs 1, 2 and 6 into a standby state. The time t4 for the post-roll running is, for example, 2 seconds.

As described above, when editing the video material using the editing apparatus of the present embodiment, when the two VTRs are started to run at the same time, the absolute rising delay time of the two VTRs is calculated. One of the VTRs is started to run earlier, pre-rolled by the difference, and the other
When the running of one VTR is started in order to synchronize with the VTR, the running of the VTR is started earlier by the absolute rising delay time of the VTR and the pre-roll running is performed. Even without adjustment, the travel position of each VTR becomes the position of the accurately set time code at the edit point (in point), and high-accuracy editing of one frame unit can be realized by simple control. Further, even if the running speed of each VTR is not finely adjusted during the pre-roll running, the running position of each VTR is automatically set to the set position at the edit point (in point), which is necessary for the pre-roll running. The time required for editing can be shortened.

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

In the above embodiment, two reproduction side VTRs are used.
And an editing system using one recording VTR, the number of reproduction VTRs and recording VTRs may be increased. Further, a video recording device or a video reproducing device (for example, a recording / reproducing device using a video disk as a recording medium) other than the VTR may be used.

[0051]

According to the present invention, since the reproduction 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 controlled
When the editing point is reached, the reproducing means and the recording means can be easily synchronized with each other accurately, so that accurate control can be easily performed. In particular, the count signal of the counter and each playback
Means and a time code signal supplied from the recording means.
From the difference, detect the absolute rise delay time data
By storing it, absolutely simple processing in the editing device
Start-up time data
Preparation for performing control based on the data
It will be easy to do.

In the case described above, when any two reproducing means or recording means are operated, the timing for operating one of the reproducing means or the recording means is determined by the relative difference between the two rise delay times. By operating earlier than the timing originally set to control, when the edit point is reached, the reproduction position or recording position of the two reproducing means or recording means becomes exactly set, so that the two Editing processing can be performed by accurately synchronizing the reproducing means or the recording means.
Editing in which an editing point is set for each frame can be easily performed.

Further, when any one of the reproducing means or the recording means is operated in the above-described case, the timing at which this reproducing means or the recording means is operated is controlled by the amount indicated by the absolute rise delay time data. By performing the operation earlier than the set timing, for example, when the reproducing operation is already performed by one reproducing unit, when the other reproducing unit is operated later, the absolute rising delay is caused. By operating as early as the time data indicates, you can easily synchronize these two units,
Editing in which an editing point is set for each frame can be easily performed.

[0054]

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a configuration of an editing apparatus according to an embodiment of the present invention and peripheral components thereof.

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

FIG. 3 is an explanatory diagram illustrating a measurement state of a rise time according to an embodiment;

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st reproduction | regeneration side VTR 2 2nd reproduction | regeneration side VTR 6 recording side VTR 20 video editing apparatus 21, 22 video signal input terminal 25 1st frame memory 26 2nd frame memory 27 switcher part 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

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 27/024 G11B 27/28 H04N 5/7826

Claims (3)

(57) [Claims] 1. A first video signal input unit to which a first video signal reproducing unit is connected, a second video signal input unit to which a second video signal reproducing unit is connected, and the respective video signals Switching means for switching a video signal obtained at an input unit; a video signal output unit for outputting a video signal switched by the switching means and being connected to a video signal recording means; switching control of the switching means; Control means for controlling the reproduction of the second video signal reproducing means and the recording control of the video signal recording means, wherein the control means controls the first and second video signal reproducing means at a predetermined position In the video editing apparatus for reproducing the video signal and selecting the video signal by the switching means, and recording the selected video signal by the video signal recording means, a counter for measuring a reference time; Record And storage means for storing the absolute rise delay time of the unit is provided, said control means includes a count signal of the counter, the
First and second video signal reproducing means and video signal recording means
From the time code signal supplied from the
The rising delay time data is detected and stored in the storage means.
When the control means operates the first and second video signal reproducing means or the video signal recording means, the control means takes into account the absolute rise delay time data stored in the storage means. A video editing device that sets the timing. 2. When any two of the first and second video signal reproducing means and the video signal recording means are operated, the absolute rising delay time data stored in the storage means is used. The relative difference between the rising delay times of the two units is determined by the control means, and the timing at which one of the reproducing means or the recording means is operated by the determined relative difference is a timing originally set to control. 2. The video editing device according to claim 1, wherein the video editing device is operated earlier. 3. When any one of the first and second video signal reproducing means and the video signal recording means is operated, it is indicated by absolute rising delay time data stored in the storage means. 2. The video editing apparatus according to claim 1, wherein the timing for operating the reproducing means or the recording means is operated earlier than the timing originally set to control.