JPH08214254A - Video edition synchronizing device - Google Patents

Abstract

PURPOSE: To obtain a video edition synchronizing device capable of executing video edition by plural video recording/reproducing devices arranged on plural remote places by transmission. CONSTITUTION: On the master side, a synchronizing signal 7 for video edition is outputted from a synchronizing signal oscillating device 2 and applied to a video edition operating device (master) 1 for controlling a VTR-A and a VTR-C and a video transmitter (master) 3. The transmitter 3 encodes the signal 7 and transmits the encoded signal to a slave side arranged on a remote place through a transmission line 4. On the slave side, a video transmitter (slave) 5 decodes the encoded synchronizing signal and applies the encoded signal to a video edition operating device (slave) 6 for controlling a VTR-B as a synchronizing signal 8. Since a synchronizing signal is transmitted to a remote place while preventing the generation of an error by encoding and plural VTRs arranged on respectively remote places are mutually synchronized, video edition among plural remote places can be attained by video transmission.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a video editing device in a distributed video editing field for playing, recording or editing a video recorded in a video recording / reproducing device such as a (video tape recorder).

[0002]

2. Description of the Related Art It is impossible to reproduce, record or edit images recorded in two or more VTRs unless the VTRs are synchronized so that the reproduction speeds of the images are completely the same. Therefore, conventionally, each VTR is based on a synchronization signal from one synchronization frequency oscillator at one point.
Was controlled and it was virtually impossible to do this at multiple remote points. Usually, even when distributing the synchronization signal to a plurality of points, these points had to be geographically close (within several tens of meters).

[0003]

As described above, due to the problem of synchronization in video editing, in the conventional video editing, the video to be edited is recorded in the VTR which can be reproduced based on the same sync frequency, and It was necessary to play the video based on the sync frequency. For this reason, it is necessary to make it possible to reproduce all edited videos in advance by a VTR connected to one video editing device.
It was necessary to send (or receive) a tape medium such as R in advance. Therefore, there is a problem in that it takes time and labor to edit recorded images between remote places.

The present invention has been made to solve the above problems, and an object thereof is means for enabling video editing by video recording / reproducing devices at a plurality of remote points by video transmission. May be provided.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, one or a plurality of video recording / reproducing devices for accumulating or reproducing or accumulating / reproducing an image, and an image A video editing synchronization device for controlling in synchronization with a video recording / reproducing device arranged at a remote location via a transmission means and a transmission path, and a synchronization frequency oscillation for generating a synchronization signal for synchronizing video. Means and video editing operation means for controlling the video recording / playback apparatus by the sync signal, wherein the video transmission means encodes the sync signal together with the video signal on the sync frequency oscillator side, and It is constructed such that it is transmitted to a remote point, the encoded sync signal is decoded at the remote point side, and is given to a video editing operation means or a video recording / reproducing device arranged at the remote point side. And means for image editing synchronizer.

In the second aspect of the present invention, in the above structure, the video transmission means encodes the synchronizing signal into the dummy video signal when the video of the video recording / reproducing device at the remote location is recorded. A sync signal is transmitted to the remote point, and the video editing operation means at the remote point side controls the video recording / reproducing device by the decoded sync signal and transmits the reproduced video signal through the video transmission means and the transmission path. A video editing synchronization device configured to do so is used.

Furthermore, in the third aspect of the present invention, in the above-mentioned configuration, the video transmission means converts the encoded data indicating the order of each horizontal line video data of the video signal into the horizontal line video data as a synchronization signal. Attached and transmitted to a remote point, the remote point side decodes the coded data indicating the order, detects the disorder of the order, detects a synchronization signal, and a video editing operation means or video arranged at the remote point side A video editing synchronizing device configured to be applied to a recording / reproducing device is used as means.

[0008]

The video editing synchronizing device of the present invention transmits a sync signal for video editing to a remote location by using the video transmitting means. At this time, the sync signal of one synchronizing frequency oscillating means is encoded. Error is also prevented by decoding it at the remote point side, and by transmitting the sync signal of the sync frequency oscillating means to the video editing operation means at the remote point side or directly to the video recording / reproducing device. The video recording / playback devices between the grounds are synchronized with each other to enable video editing across multiple remote points by video transmission.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing a configuration example of a video editing synchronization device at a remote location for explaining an embodiment of the present invention. Here, VTR is set at one point (master side)
(Video tape recorder) -A, VTR-C, video editing operation device (master) 1, synchronization signal oscillator 2, and video transmission device (master) 3 are arranged. At the other point (slave side) remote from this point, the video transmission device (slave) 5, the video editing operation device (slave)
6, VTR-B is installed, and video transmission devices at both points 3,
5 are connected by a transmission line 4.

In the above, the synchronizing signal (black burst) from the synchronizing signal oscillator 2 is VTR-A, VTR.
It is sent to the video editing operation device (master) 1 and the video transmission device (master) 3 that control C. The video transmission / transmission (master) 2 internally encodes the synchronization signal 7 and outputs the VTR.
-The video signal reproduced by A or the like is sent to the transmission path 4 together with the coded video data. On the other hand, the video transmission device (slave) 5 decodes the sync signal coded together with the video data and gives it as the sync signal 8 to the video editing operation device (slave) 6. In this case, it is possible to directly provide the sync signal 8 to the VTR-B without disposing the video editing operation device (slave) 6. In this way, the synchronization signals of the same frequency can be obtained at both the master and slave points, and the VTR-A and VTR located at both remote points can be obtained.
-B, VTR-C synchronization can be achieved.

FIG. 2A is a diagram showing the relationship between the sync signal and the video signal. First, the video signal consists of a series of frame or field information, but at this time, a synchronization signal for discriminating the frame (or field) n, n + 1, n + 2, etc. is used. This is the synchronization signal 7 output from the synchronization signal oscillator 2 on the master side shown in FIG.
Is.

FIG. 2B is a diagram showing an example of encoding the synchronization signal. In this example, encoding is performed as follows.
That is, since a frame or field is composed of horizontal line video data, the line number is attached to the beginning of each horizontal line video data. At this time, this line number is a number that does not cause an error due to an error in the transmission path or the like. As shown in FIG. 2B, if the line numbers are assigned in ascending order such as 1, 2, ... N, when the numbers are disturbed in the ascending order (when n → 1), the frame (or field) is switched. And it can be considered that this point is the synchronization signal.

Therefore, the video transmission apparatus (master) 3 shown in FIG.
Then, it becomes possible to transmit the synchronizing signal by attaching this line number to each horizontal line of the video data based on the synchronizing signal 7, and the video transmitting device (slave) 5 monitors this line number and disturbs the order. In this case (however, except at the time of error), it can be detected as the synchronization signal 8. As a result, the VTR-A, VTR-B, and VTR-C can be given the synchronization signals of the same frequency.

As an example of the form of video editing in FIG. 1,
The video reproduced by VTR-A and the video reproduced by VTR-C are edited and the edited video is recorded in VTR-B at the remote location, or the video played by VTR-A and the VTR-at remote location. Edit the video played on B and
A mode in which the data is recorded in R-C can be considered.

In the case of the latter embodiment described above, the video transmission device (master) 3 attaches a sync signal obtained by encoding a sync signal to a dummy video signal such as a black screen as a video signal, and attaches the sync signal to a slave at a remote location. On the slave side,
The video editing operation device (slave) 6 controls the VTR-B by the decoded synchronization signal 8 and transmits the reproduced video signal to the master side via the video transmission device (slave) 5 and the transmission path 4. Here, when there is a transmission delay in the video on the slave side, a buffer memory for temporarily storing the video data of one or a plurality of frames (or fields) is provided in the video transmission device (master) 3 or the video depending on the degree of the delay time. It is provided on the editing operation device (master) 1, and the synchronization signal
It suffices to read in synchronization with

When the sync signal is encoded, a code indicating the sync signal may be attached to the video data of the frame (or field). Further, in the above embodiment, the example in which the slave side is one point has been described.
Even if the slave side has multiple points, it is obvious that the synchronization signal can be similarly delivered. Furthermore, the video recording / reproducing device is not limited to the VTR, and a device dedicated to video recording or video reproduction can be used according to the application.

[0018]

According to the video editing / synchronizing apparatus of the present invention, the sync signal required for video editing by the video recording / reproducing apparatus is encoded and transmitted to a remote location. Synchronization for video editing can be achieved, and video transmission over multiple remote points by video transmission becomes possible. Therefore, it is not necessary to send the video medium (tape on which the video is recorded) to the video editing operation means at one place in advance.

In particular, when recording an image from a video recording / reproducing device at a remote location, a dummy video signal is transmitted to the remote location by transmitting a synchronization signal to the remote location. When the video recording / reproducing device is controlled to transmit the reproduced video signal, it is possible to edit the video in various forms between multiple points.

Further, coded data indicating the order is attached to each horizontal line video data of the video signal as a synchronizing signal and transmitted to a remote point, and the remote point side detects the disorder of the order and detects the synchronizing signal. In this case, the sync signal can be transmitted without error.

[Brief description of drawings]

FIG. 1 is a block diagram illustrating a configuration of an exemplary embodiment of the present invention.

FIG. 2A is a diagram showing a relationship between a video signal and a synchronization signal in the above embodiment, and FIG. 2B is a diagram showing an example of encoding a synchronization signal in the above embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Video editing operation device (master) 2 ... Sync signal oscillator 3 ... Video transmission device (master) 4 ... Transmission line 5 ... Video transmission device (slave) 6 ... Video editing operation device (slave) 7, 8 ... Synchronization signal VTR-A, VTR-B, VTR-C ... Video tape recorder

Claims (3)

[Claims] 1. A video recording / reproducing apparatus for accumulating or reproducing or accumulating / reproducing an image, and a video recording / reproducing apparatus arranged at a remote point via a video transmission means and a transmission path. A video editing synchronization device for controlling the video recording / playback device according to the sync signal, the sync frequency oscillating means generating a sync signal for synchronizing the video; The video transmission means encodes the synchronization signal together with a video signal on the side of the synchronous frequency oscillator and transmits the synchronization signal to the remote point, and decodes the encoded synchronization signal on the side of the remote point. A video editing synchronizing device characterized by being provided to a video editing operating means or a video recording / reproducing device arranged at the remote point side. 2. The video transmission means is for recording / recording video at a remote location.
When recording the video of the playback device, a sync signal is encoded together with a dummy video signal and transmitted to the remote point, and the video editing operation means at the remote point side controls the video recording / playback device by the decoded sync signal. 2. The video editing synchronization device according to claim 1, wherein the video signal which is controlled and reproduced is transmitted via a video transmission means and a transmission line. 3. The video transmission means attaches coded data indicating the order of each horizontal line video data of the video signal as a coded synchronization signal to each horizontal line video data and transmits it to a remote point. On the side, the encoded data indicating the order is decoded, the disorder of the order is detected, the synchronization signal is detected, and it is given to the video editing operation means or the video recording / reproducing apparatus arranged at the remote point side. The video editing synchronization device according to claim 1 or 2.