JPH0547029B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a video editing control device that performs control to correct various conditions of playback signals from a plurality of raw video tapes during video tape editing.

[Conventional technology]

In video editing, that is, the process of appropriately splicing the playback signals from multiple video tapes recorded by a VTR and transferring them onto a slave tape, the state of the playback signals from each video tape is recorded by the video camera. Due to various factors such as the condition of the equipment such as VTR, weather, etc.
If the necessary parts of each reproduced signal are simply reconnected, problems such as brightness levels and color tones will change significantly at the joints, and synchronization will be disrupted will occur.

In order to avoid such problems, video editing uses a signal correction device called a time base corrector (TBC) to correct and edit the state of the playback signal from each material videotape. Here, the time base corrector is a time axis correcting device in a narrow sense, but generally has a function of correcting various states of a reproduced signal from a videotape. There are many correction items in the time base collector, including seven items: input level, video gain, chroma gain, setup, HUE (hue), H (horizontal synchronization) phase, and SC (color subcarrier) phase. When recording video on location, etc., a reference signal (color bar signal) is recorded on the videotape before recording each time the day changes or the location is moved, and the standard is played back from the source videotape during editing. While monitoring the signal with a waveform monitor or vectorscope, you will adjust the time base collector and make corrections.

[Problem that the invention seeks to solve]

When editing a video, it is usually necessary to make correction adjustments individually for each raw videotape, at least for the seven items listed above. However, when there are many locations such as in recent TV dramas, 10 to 20 raw video tapes are used for a 60-minute program, and even more tapes are used for documentary programs, so they can be used for playback during editing. The number of times the tape must be reset on a VTR increases accordingly. In that case, the VTR for playback
It is extremely tedious to make these multi-item correction adjustments from the beginning each time a different source videotape is set again, and is one of the reasons why video editing takes a long time.

The present invention has been made in view of these conventional problems, and it eliminates the need for subsequent adjustments after one adjustment is made to correct the reproduced signal from the same raw videotape. An object of the present invention is to provide a video editing control device that enables highly efficient video editing.

[Means for solving problems]

In order to achieve this object, the present invention includes a plurality of rotary encoders that generate pulse signals at every fixed rotation angle for adjusting the correction of a playback signal from a raw videotape to be edited;
A plurality of counters each count pulse signals from these plurality of rotary encoders and output digital values according to the number of pulse signals, and the digital values output from these plurality of counters are used as adjustment amount data for each of the material video tapes. a storage means for individually storing the adjustment amount data, and a correction means for correcting the adjustment amount data stored in the storage means via the rotary encoder and the counter;
The basic feature is that the apparatus further comprises a readout means for selectively reading out the adjustment amount data stored in the storage means in accordance with the material videotape to be played back.

Further, in addition to the above-mentioned basic configuration of the present invention, the present invention is further provided with a correction means for correcting a playback signal from the material videotape to be played back in accordance with the adjustment amount data read out by the readout means. shall be.

[Effect]

In the video editing control device according to the present invention, each time a material videotape is set on a playback VTR, an adjustment amount for correcting a playback signal from the material videotape is read from the storage means, and the correction means (e.g. timebase collector)
supplied to Therefore, once you have made correction adjustments to the playback signal from a certain source videotape and once stored them, you will need to make the adjustments again when you subsequently set the same source videotape on a VTR for playback. Instead, it is sufficient to simply read out the data of the corresponding adjustment amount from the storage means.

Further, in the present invention, a rotary encoder is used as the adjustment means, and a pulse signal from the rotary encoder is converted into a digital value by a counter and stored as adjustment amount data in a storage means. A variable resistor mechanically maintains the final adjusted state and generates a voltage corresponding to the resistance value in that state, whereas a rotary encoder does not generate a pulse signal when rotation is stopped. When a rotation operation is started, a number of pulse signals corresponding to the rotation angle are generated. Therefore, by rotating the rotary encoder again with the stored adjustment amount data read out, a part of the adjustment amount data can be temporarily corrected (increased or decreased) by the correction amount corresponding to the rotation angle of the rotary encoder. ), and the adjusted amount data can be newly stored.

〔Example〕

FIG. 1 is a block diagram of a video editing control device according to an embodiment of the present invention. In the same figure, the time base collector (TBC) as a correction means
1 introduces a playback signal from a raw video tape played by a playback VTR, and, for example, inputs the input level, video gain, chroma gain, setup, HUE, H phase, and SC phase described above.
This is an existing method that makes corrections including items. The output of the time base collector 1 is supplied to the next stage of equipment, as well as to the waveform monitor 3, vector scope 4, and the like. The time base collector 1 is equipped with a remote control input corresponding to at least the seven items mentioned above, in addition to an adjustment section using a variable resistor 2, and a signal for controlling the adjustment amount is sent to the remote control input from the control section based on the present invention. is supplied.

To explain this control section, first, the adjustment section 5
is for making adjustments related to the above-mentioned seven items of correction, and is constituted by, for example, a rotary encoder that generates pulses at every fixed rotation angle. The pulse signals from each rotary encoder of the adjustment section 5 are converted into digital values according to the number of pulses by the counter 6, and then converted to a digital value corresponding to the number of pulses at the write I/O port 7
is input. The signal from I/O port 7 is
CPU9 according to the program stored in ROM8
Under the control of
Written to RAM10. The contents of the RAM 10 are similarly read out under the control of the CPU 9 and supplied to the read I/O port 11. The output of the I/O port 11 is a digital value expressing the adjustment amount related to the above seven correction items, and after each is converted into an analog voltage by the D/A converter 12, it is sent to the remote control input of the time base collector 1. supplied to The I/O ports 7 and 11 are controlled by a tape selection switch 13, which will be described later, and transfer the output data of the counter 6 and the adjustment amount data read from the RAM 10 each time a material video tape is selected. .

FIG. 2 is an example of an external view of the control section, in which, in addition to the adjustment section 5, there are a plurality of tape selection switches 13 (10 in this example) corresponding to a plurality of material video tapes, and one alignment switch. A tape designation switch 14, a switch 15 for designating write enable/disable of the RAM 10, a switch 16 for clearing the contents of the RAM 10, a switch 17 for enabling adjustment of the adjustment section 5, and a switch 17 for enabling the adjustment of the RAM 10.
A switch 18 and the like are provided for instructing writing.

Next, referring to the flowchart shown in Figure 3,
The procedure for writing adjustment amount data into the RAM 10 will be explained. First, switch 16 switches the RAM
After clearing the contents of 10, the alignment tape, which is a reference videotape, is played back by the playback VTR, and while monitoring the playback signal of the reference signal with the waveform monitor 3 and vectorscope 4,
Each correction item of the time base corrector 1 is adjusted via the adjustment section 5. That is, the initial state of the time base collector 1 is adjusted. In this case, the contents of counter 6 are applied to the remote input of time base collector 1 via I/O port 7, I/O port 11 and D/A converter 12 in sequence under the control of CPU 9. In addition, 7
Of the two correction items, the input level is monitored by a dedicated level display 19, and the video gain, chroma gain, setup, and H phase are monitored by the waveform monitor 3.
The SC phase is monitored using a vector scope 4. When the adjustment is completed in this way, the contents of the counter 6 at that time are stored in the RAM as adjustment amount data.
Write to 10.

Next, the material videotape is played back by the playback VTR, each correction item of the time base corrector 1 is adjusted via the adjustment section 5 in the same manner as when playing the alignment tape, and the adjustment amount data is stored in the RAM.
Write to 10. In other words, if M _A is the initial state of the time base collector 1 adjusted based on the alignment tape, then the error between the reference signal recorded on the raw videotape and the reference signal recorded on the alignment tape is M _A will be further corrected by the corresponding ΔM _T . Specifically, when playing the alignment tape, RAM1
The adjustment amount data corresponding to M _A written in 0 is
The CPU 9 adds and subtracts this adjustment amount data read from the RAM 10 and the data corresponding to ΔM _T obtained from the counter 6 by the adjustment by the rotary encoder of the adjustment unit 5 during the reproduction of the reference signal of the material videotape, and corrects this data. The added and subtracted results are newly written to the RAM 10 as adjustment amount data corresponding to the material videotape. Thereafter, the correction items of the time base collector 1 are adjusted in the same manner when all the material video tapes are played back, and all the adjustment amount data at that time is written into the RAM 10.

If the adjustment amount data corresponding to all the source video tapes is written to the RAM 10 as described above, then when playing back any source video tape during video editing, the switch corresponding to the source video tape in the switch 13 will be set. Just operate
The corresponding adjustment amount data is read from the RAM 10, and the time base collector 1 is automatically adjusted based on it. Therefore, even if there are a large number of source video tapes, it is difficult to use conventional source video tapes for playback.
This eliminates the need for complicated manual adjustments to the timebase collector that must be made each time the VCR is reinstalled, making editing tasks extremely easy. In particular, in the case of cutback editing, conventionally it was particularly troublesome to adjust the time base corrector by rewinding the source videotape to the position where the reference signal was recorded, but with this device, this was particularly troublesome. Adjustments can be made with one touch without rewinding, and the effect is extremely large.

In addition, after writing the adjustment amount data regarding each correction item corresponding to all the source video tapes into the RAM 10 as described above, if you want to temporarily correct a part of the adjustment amount data that has been stored, for example, If you want to temporarily correct the adjustment amount data regarding a specific correction item of the time base collector 1 for a specific scene of the playback signal from the source videotape, operate the tape selection switch 13 to transfer the corresponding adjustment amount data to the RAM 10. The corresponding rotary encoder of the adjustment section 5 may be adjusted when the playback signal of the scene is obtained from the material videotape in this state. At this time, similarly to the previous storage operation of the adjustment amount data, the data read out from the RAM 10 in response to the operation of the tape selection switch 13 (in this case, the adjustment amount data) is
The CPU 9 corrects the correction amount corresponding to the rotation angle of the rotary encoder, and the corrected adjustment amount data is transferred to the I/O port 11 and the D/A converter 1.
2 to the remote input of the time base collector 1.

Here, a case will be considered in which a variable resistor is used in the adjustment section 5. The variable resistor mechanically maintains the final adjustment state (rotation angle from zero position), and the voltage corresponding to the resistance value in that state, that is, the adjustment amount data corresponding to the material videotape currently being played. is generating an unrelated voltage. Therefore, as mentioned above, if you want to temporarily correct the adjustment amount data regarding a specific correction item for a specific scene of a playback signal from a specific source videotape, you need to set the variable resistor corresponding to the source videotape from the beginning. Have to readjust. In this case, the already memorized adjustment amount data cannot be used at all,
Very inefficient work.

On the other hand, if a rotary encoder is used as in the present invention, it is only necessary to read out the adjustment amount data to be corrected from the RAM 10 as described above and rotate the corresponding rotary encoder by the correction amount, which improves work efficiency. Much improved. It is also possible to write the thus modified adjustment amount data into the RAM 10 and read and use it when necessary.

〔Effect of the invention〕

As described above, according to the present invention, by providing a means for storing adjustment amounts for correcting playback signals from a plurality of raw video tapes, after the adjustment is performed once, the stored adjustment is stored. Since adjustments are automatically made by reading out the amount of data, it can greatly contribute to improving the efficiency of video editing.

Further, in the present invention, a rotary encoder is used as the adjustment means, and the pulse signal from the rotary encoder is converted into a digital value by a counter and stored as adjustment amount data in the storage means. By rotating the rotary encoder with the data read out, it is possible to temporarily correct part of the adjustment amount data efficiently, and it is also possible to newly store the adjusted adjustment amount data. It is possible.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a video editing signal correction device according to an embodiment of the present invention, Fig. 2 is an external view of a control section in the same device, and Fig. 3 shows a procedure for writing adjustment amount data in the same embodiment. This is a flowchart for explanation. 1... Time base collector, 5... Adjustment section (rotary encoder), 6... Counter, 10...
...RAM (adjustment amount storage means), 12...D/A converter, 13...tape selection switch.

Claims (1)

[Scope of Claims] 1. A plurality of rotary encoders that generate pulse signals at every fixed rotation angle for adjusting correction of a playback signal from a raw videotape to be edited; a plurality of counters that count each pulse signal and output a digital value corresponding to the number of pulse signals; and a storage means that individually stores the digital values output from the plurality of counters as adjustment amount data for each of the material video tapes. and a correction means for correcting the adjustment amount data stored in the storage means via the rotary encoder and the counter, and the adjustment amount data stored in the storage means corresponds to a material videotape to be played back. 1. A video editing control device comprising: reading means for selectively reading out the video data. 2. A plurality of rotary encoders that generate pulse signals at each fixed rotation angle to adjust the correction of the playback signal from the raw videotape used for editing, and a system that counts the pulse signals from each of these rotary encoders. a plurality of counters that output digital values according to the number of pulse signals; a storage means that individually stores the digital values output from the plurality of counters as adjustment amount data for each of the material video tapes; modifying means for modifying the stored adjustment amount data via the rotary encoder and the counter; and selectively reading the adjustment amount data stored in the storage means in accordance with the material videotape to be played back. A control device for video editing, characterized in that it is equipped with a readout means for reading out the data, and a correction means for correcting a playback signal from the material videotape to be played back according to the adjustment amount data read out by the readout means. .