JPS63317996A - Video edit device - Google Patents

Abstract

PURPOSE:To attain edit recording for a section of start, end tape designation position by operating and setting one or both increase/decrease correction data of a start/end point reference data. CONSTITUTION:Data of a tape reproducing position before by a specified value of start/end from a start/end tape designated position is set in a storage section 3 as the start/end point reference data through operation. A correction counter section 4 sets the increase/decrease correction data of the start/end point reference data and the output timing of the control signal of recording start/end is deviated from the timing based on the specified value by the quantity of the increase/decrease correction data. Thus, the start/end timing of the recording of a video tape recorder at the recording side is corrected automatically in response to the operation delay time of a video tape recorder at the recorder side. Thus, the edit recording is applied for the section of the start/end tape designation position.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention controls the start and end of recording of a video tape recorder on the recording side based on control signals for the start and end of recording of the video tape recorder on the playback side, The present invention relates to a video editing device that performs editing recording (dubbing recording).

[Conventional technology]

Conventionally, among rotary head type home video tape recorders (hereinafter referred to as VTRs), especially high-end types, recording start signals are called camera remote signals.

Some devices have an editing function that outputs an end control signal to control editing recording.

Then, connect the VTR with this kind of editing function to the playback VTR.
and the same type of VTR or VT without editing function.
By setting R as the recording side VTR, the playback side VTR
A video editing apparatus is formed that performs editing and recording by automatically controlling the recording start and end of the recording side VTR based on the recording start and end control signals.

By the way, as shown in FIG. 5(a), the aforementioned control signal for starting and ending recording rises to a high level (hereinafter referred to as H) at the start and goes to a low level (hereinafter referred to as H) at the end. Consists of descending signals.

On the other hand, the recording-side VTR is controlled to a recording pause mode before the start of editing recording, and when the control signal in FIG. At the falling edge of , the mode is switched to stop mode and recording ends.

Then, V on the recording side is controlled by the recording start and end control signals.
Since the operation of the TR is controlled, the timing of the actual recording start and end of the recording side VTR is as shown in Figure 5 (1).
), there is a delay from the rise and fall of the input control signal by operation delay times Ts and Te, respectively.

Therefore, the VTR on the playback side starts tape playback after rewinding to a tape position a certain value before the specified editing start tape position, and also adjusts the operation settings by, for example, counting tape playback control signals. The timing of the tape playback position is a predetermined value for the start and end of the specified editing start and end tape positions, respectively, that is, the tape playback position is set in consideration of the operation delay times Ts and Te of the recording side VTR, respectively. Recording starts and ends at the timing of ′), ・], outputs the control signal, and starts editing.

The tape playback signal of the section at the specified end tape position is recorded on the recording side VTR.

[Problem that the invention seeks to solve]

By the way, the above-mentioned operation delay times Ts and Te vary depending on the manufacturer, model, etc., and for example, with respect to the rise of the recording start and end signals in FIG. 6(a), the delay times Ts and Te in FIG.
, (C) and (d), the recording side VTR
When the operation delay time Ts becomes the specified value Tso, a value Tsl shorter than the specified value Tso, and a longer value TS2, only Peo in case (1) of the same figure is dubbed and recorded, but the sixth
In the case of Figures (C) and (d), for example, Figure 7 (B)
, As shown in the shaded area in (C), redundant recording or insufficient recording occurs, making it impossible to perform accurate editing recording.

Then, when playing a tape that has been edited and recorded, 1 frame C
I/80SE), if there is an extra image, the image will be very noticeable and the editing effect will be significantly reduced.

To compensate for the discrepancy between the default start and end times of the playback side VTR and the start and end operation delay times of the recording side VTR, for example, change the specified editing start and end positions by the amount of deviation. It may be possible to set the operation in anticipation of this, but
In this case, for example, after determining the desired start and end designated positions, it is necessary to correct the deviation amount to find the actually set start and end designated positions, which requires a very complicated operation. Moreover, it cannot be done accurately.

It is still possible to variably correct the operation delay time of the recording side VTR in advance, but since the timing of splicing recording at the start of recording changes due to the correction, in reality, the operation delay time of the recording side VTR It is difficult to correct.

A technical object of the present invention is to correct the above-mentioned deviation with a simple operation, and to enable editing and recording of sections at designated start and end tape positions.

[Means for solving the problem] This invention has been made with the above points in mind,
Recording starts from the video tape recorder on the playback side to the video tape recorder on the recording side at the tape playback position that is a specified value before the specified editing start and end tape position.
output a termination control signal, control the start and end of recording in the recording side video tape recorder based on the surface control signal, and control the operation delay time of the recording side video tape recorder from the timing of both control signals; In a video editing apparatus that starts and ends editing recording with a delay of 100 seconds, the video tape recorder on the playback side receives the start and end signals from the specified start and end tape positions.

a storage section in which data at a tape playback position a predetermined value before the end is calculated and set as start and end point reference data; a correction counter section in which increase/decrease correction data for one or both of the reference data is operated and set; Data obtained by subtracting and correcting the increase/decrease correction data of each of the two reference data is added to both reference data, and measurement data of the tape playback position starts.

It is characterized by comprising: a measurement counter section that outputs start and end command pulses respectively when preset end data is reached; and a control signal generation section that forms and outputs both control signals based on both command pulses. This is a video editing device.

[For production]

Therefore, according to the video editing apparatus of the present invention, by operating and setting the increase/decrease correction data of the start and end point reference data in the correction counter section, the output timing of the control signal for recording start and end can be adjusted according to the increase/decrease correction data. With a simple operation, the start and end timing of recording on the recording side video tape recorder can be automatically corrected according to the operation delay time of the recording side video tape recorder. Editing and recording can be performed only for the section at the specified end tape position.

〔Example〕

Next, the present invention will be explained in detail with reference to FIGS. 1 to 4 showing one embodiment thereof.

The side VTR, (2) is a microcomputer (hereinafter referred to as microcomputer) for system control or editing provided in the VTR (1), and (3) is where the start and end point reference data are calculated and set. Based on the specified editing start and end positions Pso and Peo,
The data of the tape playback position before the specified start and end values Tso and Tea are calculated and set as the start and end point reference data.

(4) is a correction counter section in which increase/decrease correction data for one or both of the start and end point reference data of the storage section (3) is operated and set, and (5) is a measurement counter section. ) The data obtained by subtracting the increase/decrease correction data of the correction counter section (4) from the start and end point reference data are sequentially preset, and the tape playback control signal is input from the control head via the input terminal (6). is counted to form measurement data of the tape playback position, and when the measurement data reaches preset start and end data, start and end command pulses are output, respectively.

(7) is a control signal generation unit to which the start and end command pulses are input, and based on the input of both command pulses, the recording start and end are controlled by rising when the start command pulse is input and falling when the end command pulse is input. A signal is formed and the control signal is output to the recording side VTR.

Note that the calculation of the start and end point reference data set in the storage unit (3) and the count 1 determination of the counter unit (5) are as follows.
Actually, this is performed by software processing of the microcomputer (2).

When editing is to be performed, the editing start and end tape specified positions are first set to set the editing point.

Note that the operation settings for the start and end tape designated positions can be performed, for example, by setting the desired start and end tape designated positions P determined in advance.
This is done by setting the tape counter values of so and Peo.

Next, the increase/decrease correction data is set in the counter section (4), and editing is started after the setting.

Note that the operation settings for the increase/decrease correction data may be set, for example, by the predetermined start and end values Tso,
This is done by determining the difference between the timing based on Tea and the timing based on the actual operation delay time Ts and Te of the VTR on the reproduction side.

By the way, the start and end tape designated positions Pso and Pc.

When Pso is set, both phases are set in a fixed position Pso.

The tape playback positions that are the specified values Tso and Tea before Peo are calculated, and both tape playback positions are the start.

It is set in the storage unit (3) as end point reference data.

Then, the tape playback position of the start and end point reference data set in the storage unit (3) is the number of pulses of the playback control signal
, Y, and at this time, the tape playback start position is 8 seconds before the specified position Pso, that is, 2 seconds with the playback control signal.
If it is set 40 pulses earlier and the start and end increase/decrease correction data are set to the number of pulses X and y of the reproduction control signal, the setting of the start and end point reference data is completed as shown in Figure 2. Sometimes, the VTR (1) is automatically controlled to rewind, and at this time, the counter section (5)
The amount of rewinding can be measured using
The tape is rewound until it becomes distorted.

Furthermore, when the tape is rewound by a specified value, the VTR (
1) is controlled to play and editing is started, and at this time, the counter section (5) receives data obtained by subtracting and correcting the starting increase/decrease correction data X of the counter (4) from the starting point reference data X of the storage section (3). X−x is immediately preset.

ζ et al., the count value 2 of the counter section (5) is Z = X −
When x is reached, the counter part (5) to the generating part (7)
A start command pulse is output to the VTR on the recording side, and a control signal to start recording is output from the generator (7) to the VTR on the recording side.
TR moves from recording pause to recording, and VTR (1)
Start recording the tape playback signal.

When recording on the recording side VTR is started, the counter section (5) displays data Y-y obtained by subtracting and correcting the ending correction tape y of the counter (4) from the end point reference tape Y of the storage section (3). will be preset immediately.

Then, when the count value Z of the counter section (5) reaches Z=Y-y, a termination command pulse is output from the counter section (5) to the generating section (7), and the generating section (7) starts recording. side VT
A recording end control signal is output to R, the recording side VTR shifts from recording to stop, recording of the tape playback signal of VTR (1) ends, and editing recording ends.

Incidentally, the timing at which the recording start and end control signals are outputted corresponds to the respective counting timings of X-x, ' and -y, and the recording side VTR actually starts recording based on the recording start and end control signals.

The end operation delay time also coincides with the respective counting timings of X-x, Y-y.

Therefore, the start of recording is output from the VTR (1).

Based on the end control signal, the recording side VTR starts recording when the count value 2 of the counter section (5) reaches the editing start and end tape designated positions Pso and Peo.

Only the sections at the end, start, and end tape designated positions Pso and Peo are edited and recorded.

Now, the start and end tape specified positions I'so and Peo are 0.
゜2400 counts each set and started.

The specified end values Tso and Tea both have a count of 60 (2
SeC) and the correction data X+Y are both set to count number 80 (IS8C), as shown in FIG.
Start playing from point S at 240 counts, and
start.

The end control signal is output at points Ps and Pc that are delayed by 30 counts from the points Pso' and Peo' at the specified timings at which the recording start and end control signals are output by the predetermined values Tso and Tea, respectively. When, the start and end operation delay times Ts and T of the VTR on the recording side
Since both e are 30 counts) (Isec), the actual recording is a recording interval of 0 counts to 2000 counts.

That is, from the designated start tape position Pso to the designated end tape position Peo.

That is, the specified start tape position Ps shown in FIG. 4(a)
o is set, and at this time, if the starting point reference data is based on the specified value Tso, the recording start and end control signals that rise 2 seconds before the specified position Pso as shown in FIG. Based on the correction data, it can be corrected so that it rises 1 sec before the specified position Pso as shown in the figure (C), and at this time, the tape of the recording side VTR is recorded as shown in the figure (C).
As shown in d), recording is started from the specified position Pso.

In general, the end position of recording can be corrected in the same way as the start position based on the increase/decrease correction data, and as mentioned above, the specified position P
Only the sections so and Peo are edited and recorded.

Therefore, based on the start and end increase/decrease correction data,
The timing of the recording start and end control signals is corrected from the specified timing based on the start and end specified values Tso and Tea according to the operation delay time Ts and Te of the recording side VTR, and the recording of the recording side VTR is corrected. Specified start and end timing: Pso, Peo
In this case, complicated processing such as correcting the specified start and end tape positions by operation, such as the actual start and end tape specified positions P
There is no need to process to find and set the start and end tape start positions corrected by the correction amount after determining so and peo.
Accurately start and end tape specified position Pso with simple operation,
Pe.

You can edit and record only the section of .

In addition, you can set the start and end increase/decrease correction data once,
There is no need to set increase/decrease correction data during subsequent editing and recording, which also has the advantage of significantly improving operability.

Roughly speaking, calculations are performed by software processing of the microcomputer (2), so for example, it is possible to change only the software of the microcomputer used for system control or editing of the conventional recording side VTR, or to change the software and the counter (4). By attaching it, it can be formed easily and inexpensively.

In addition, in the above embodiment, both the start and end were corrected, but
Normally, when an edited and recorded tape is played back, excessive recording at the start part is particularly noticeable, so for example, only the increase/decrease correction data of the start point reference data may be operated and set to correct only the start part.

〔Effect of the invention〕

As described above, according to the video editing device of the present invention, by operating and setting the increase/decrease correction data for one or both of the start and end point reference data, the timing of the recording start and end control signals can be adjusted by an amount corresponding to the correction data. The actual recording start and end timings of the video tape recorder on the recording side are automatically corrected to the playback timings of the specified tape positions for editing start and end, allowing for accurate start with a simple operation.

Editing and recording can be performed only in the section at the designated end tape position, which significantly improves operability.

[Brief explanation of drawings]

1 to 4 show one embodiment of the video editing apparatus of the present invention, FIG. 1 is a block diagram of a video tape recorder on the playback side, FIGS. 2 and 3 are flowcharts for explaining the operation, The schematic diagrams, FIGS. 4(a) to 4(d) are timing charts for explaining the operation, and FIG. 5(a). (b) is a timing chart for explaining the editing record of a general video editing device, FIGS. 6(a) to (d), and FIG.
) to (C) are timing charts for explaining the operation delay time shift and the recording position shift of the video tape recorder on the recording side, respectively. (1)...VTR1 on the playback side (2)...Microcomputer,
(3)...Storage unit, (4)...Correction counter unit, (
5)...Measurement counter section, (7)...Control signal generation section.

Claims (1)

[Claims] (1) Output control signals to start and end recording from the video tape recorder on the playback side to the video tape recorder on the recording side at the timing of the tape playback position that is a specified value before the designated editing start and end tape positions, and Starting recording of the video tape recorder on the recording side based on both control signals;
In a video editing apparatus that controls the end and starts and ends editing recording with a delay of an operation delay time of the recording-side video tape recorder from the timing of both control signals, the playback-side video tape recorder is configured to: a storage unit in which data at a tape playback position that is a predetermined value of the start and end points before the designated end tape position is calculated and set as start and end point reference data, and increase/decrease correction data for one or both of the reference data is operated and set. and a correction counter section that is preset with data obtained by subtracting and correcting the increase/decrease correction data of each of the two reference data to the two reference data, and starts when the measurement data of the tape playback position reaches the preset data of start and end. , a measurement counter section that outputs each of the end command pulses; and a control signal generation section that forms and outputs both the control signals based on the both command pulses.