JP2001218108A - Video editing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video editing device that can edit a key frame in real time while slowly reproducing an original video image and easily re-edit the key frame. SOLUTION: The video editing device is provided with a reproduction speed designation means that designates a reproduction speed of an original video image, a video image reproducing means that takes synchronization of a video image of an outputted slave image in the key frame with the original video image on the basis of a clock signal to reproduce the video image, and a key frame data storage means that stores the attributes of the edited key frame for a time corresponding to frame generation at a usual reproduction speed of the original video image through the synchronization with the clock signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video editing apparatus, and more particularly to a non-linear video editing apparatus for adding an effect video such as a small screen or a mosaic to a video using a computer.

[0002]

2. Description of the Related Art In recent years, a non-linear video editing apparatus capable of various video editing, such as adding an effect video such as a child screen or a mosaic other than the video to a video recorded on a hard disk using a computer. Is becoming popular.

FIG. 5 is a block diagram showing a configuration of a conventional video editing apparatus.

The image storage means 104 stores data of an original image and a key frame (frame) for displaying an effect image such as a child screen or a mosaic to be added to a part of the original image as follows. Are stored together with attribute values such as display position and size on the monitor.

[0005] The video reproducing means 108 extracts and reproduces the above-mentioned original video and key frame, respectively,
Reference numeral 10 combines these original video and key frames and displays them on the monitor 111. Here, the key frame is invisible on the screen (when the size of the key frame is zero) unless the specific effect image is set and the specific size is set as follows, or When the image at the position of the frame is lost, and the operator determines that it is not necessary to fit the effect image into the original image, it is a normal operation to place the image outside the display area of the original image.

[0006] In the state where the above synthesized video is generated,
When the operator inserts an effect image into the key frame, the operator specifies necessary conditions such as an image to be inserted as an effect image into the key frame and a size of the key frame from the editing instruction means 106 described below.
Edits the key frame to the specified size. Further, the video processing unit 105 fetches the data of the specific video serving as the effect video from the video storage unit 104, edits the data into the size of the key frame, and transfers the edited data to the video playback unit 108.

[0007] The two kinds of images reproduced separately in this way are passed to the image synthesizing means 110, where they are synthesized as one image and displayed on the monitor 111. Also, the same video as the synthesized video displayed in this way is recorded by the video recording device 112, and the video recorded in this way is used as an edited video in the next stage.

The position of the key frame (the position of the effect image) can be changed using a position / size editing tool such as a jog pad provided in the editing instruction means 106.
That is, as shown in FIGS. 4A to 4B, when it is desired to add a mosaic pattern as an effect image on a license plate of a running car as an original image, the operator looks at the monitor 111 while watching. , Video editing means 10
A position / size editing tool such as a jog pad 6 is operated. Then, the position of the key frame (mosaic pattern) 401 being reproduced by the video reproducing means 108 can be moved in accordance with the traveling position of the automobile, and the size can be adjusted (arrows A1 and A2). Has become.

As described above, the attribute value of the key frame at each time is set, and the editing of the key frame is completed.

[0010]

However, the conventional video editing apparatus has the following problems.

Since the original image is reproduced at a normal reproduction speed, when the object moves at high speed or moves in a complicated manner, the effect image is transferred to the object in real time by operating the instruction means. Following was a task that required a high degree of skill.

If the effect video is simply made to follow the movement of the original video, the above problem can be solved if the effect video can be edited while the original video is reproduced slowly. However, this method is as follows. For some reason.

That is, video reproduction is realized by scanning 30 frames per second. Therefore, when the above-mentioned original video is slow-reproduced n times, it means that one frame time (1/30 sec) is extended to n times, so that one frame time is formed with 1 / n scanning lines per normal time. That is, only the image to be displayed is displayed. However, since the recording apparatus is recording at a normal speed, the recording apparatus can record only an image on 1 / n scanning lines, and the image itself is extended n times and the image quality is reduced. Is deteriorated.

Although this may be solved if a video editing apparatus capable of recording the above-described slow-reproduced original video at the same speed is realized, such a video editing apparatus has not been put to practical use. For these reasons, it was not possible to edit the effect video during the slow playback described above.

Conventionally, a key frame is edited while an original video is played at a normal playback speed, and the edited key frame is stored. Had to redo all the edits.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a video editing apparatus which can edit a key frame in real time while reproducing an original video, and can easily re-edit the key frame. And

[0017]

To solve the above problems, the present invention employs the following means.

First, there is provided video reproducing means for reproducing the original video and the video of the effect video to be output in the key frame added to the original video in synchronization with the clock signal.

Next, the key frame is arranged in a predetermined manner with respect to the original image, and key frame data editing means is provided for deriving this manner as an attribute value of the key frame.

Further, key frame data storage means for storing the attribute values of the key frames separately from the original video in synchronization with the original video is provided. Thus, the key frame can be re-edited any number of times from any time.

Further, a reproduction speed setting means for setting a reproduction speed of the original image and the effect image is provided. As a result, the key frame editing operation can be performed at a speed corresponding to the skill level of the operator's editing operation.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a video editing apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a video editing device according to an embodiment of the present invention, and FIG. 2 is a diagram showing a display on a monitor when the video editing device is used.

Image storage means 104 such as a hard disk
, A plurality of video data are recorded in advance.
From these multiple images, first, the operator uses a first image used as an effect image and a second image used as an original image.
Video and select. Next, pointing means 106 such as a mouse
Is operated and the button 204 is clicked, and the playback speed of the first video and the playback speed of the second video are played back at a speed at which editing work is easy, for example, 50%, that is, half the normal speed. Set to That is, the scanning of the first and second images forms one frame in a time twice as long as the normal one frame time.

The operator operates the editing instructing means 106 such as a mouse and clicks the button 203, thereby instructing the reproduction of the video in advance from time t1 before time t2 at which the key frame is edited. As a result, the extraction of the first video data 156 from the video storage unit 104 at time t1 is started, and the first video data 156 is converted by the video processing unit 105 in accordance with the size of the key frame 201. Converted video data 1
58 is input to the video reproduction means 108. Similarly, the extraction of the second video data 157 from the video storage unit 104 at the time t1 is started and input to the video reproduction unit 108.

The video reproducing means 108 reproduces the converted video data 158 and the second video data 157 in synchronization with the clock signal 160 output from the clock signal generating means 107. Therefore, both the first video data and the converted video data are slow-reproduced at the above half speed. These two video data 162 are stored in the video synthesizing unit 110.
The converted video data 158 is displayed in the key frame 201 on the display screen 202 and the second video data 157 is displayed on the display screen 202 on the monitor 111.

While viewing the display screen 201 of the first video data and the display screen 202 of the second video data being reproduced on the monitor 111, the operator presses the rectangular key which is the display screen 201 of the first video data. The frame is moved or the size is changed by operating the editing instruction means 106.

For example, as shown in FIG. 4 (a) → (b), when it is desired to overlay a mosaic pattern as a second image on a license plate of an image of a running vehicle as a second image, The position of the key frame 401 is moved (arrows A1 and A2) in accordance with the traveling position of (1), or the size is adjusted as necessary.

When a key frame of a desired mode (position and size) is created, for example, by right-clicking the mouse (edit instruction means 106), the key frame data editing means 102 sets the above mode to the attribute of the key frame. The value of the key frame creation is taken in from the edit instructing means 106 as a value based on the frame pulse generated by the clock signal generating means 107, and the attribute value is stored in the key frame data storage means 101 as follows. .

As shown in FIG. 3A, a frame pulse for synchronizing frame formation is output from the clock signal generating means in accordance with the set reproduction speed (see FIG. 3A frame). Pulse). Here, assuming that the time at which the right click is executed is ta (see the click signal in FIG. 3A), the click state holding means (not shown) outputs the frame pulse output time t2 immediately after the time ta from the time ta. Until the click state is maintained (see the holding signal in FIG. 3A). By taking the logical product of the holding signal and the frame pulse at time t2, a key frame data capture signal (FIG. 3A) is generated at time t2.

The attribute value of the key frame is stored in the key frame data storage means 101 based on the key frame data fetch signal. Therefore, a key frame is not stored at a time when scanning of the original video is not completed by slow reproduction and information as a video is lost. At the position of the time t2 on the time axis 206, a sign 205 indicating that the key frame was created at this time is displayed.

Similarly, after the time t2, the operator sequentially proceeds to the key frames 15 for a plurality of times, such as t3 and t4.
Edit 4. The attribute values of these edited key frames 154 are stored in the key frame data storage unit 10 as described above.
1 and is also input to the key frame data interpolation means 103. In the key frame data interpolating means 103, as shown in FIG. 3 (b), the times t21 to t2m and t31 at which the frame pulse is generated during the times (t2-t3) and (t3-t4). ~ T3
n, the attribute value of the key frame at the time t2, t
Interpolation is performed linearly or according to a predetermined curve based on the attribute values of the key frames at 3 and 4.

In this way, the attribute values of the key frame data are generated for all the times synchronized with the generation of the frame of the original video, and stored in the key frame data storage means 101.

As described above, unlike the above-described conventional video editing apparatus, the video editing apparatus according to the embodiment of the present invention stores the edited key frame in the key frame data storage means 101 separately from the original video. The edited key frame can be easily re-edited. That is,
First, reproduction is performed by the editing instruction means 106 based on the first and second video data and the key frame stored in the key frame storage means 101. At this time, the operator determines that the key frame is inadequate. If it is recognized, the corresponding portion may be subjected to the same correction processing as in the above-mentioned editing procedure, and then re-edited. The reedited key frame is interpolated in the same manner as described above, and is stored in the key frame data storage unit 101.

The key frame data and the first and second images thus separately stored are synthesized by the image synthesizing means 110, recorded by the image recording device 112, and used in the next stage as an edited image. It is also possible to use the broadcasting device 113 for direct broadcasting.

As described above, according to the present embodiment, the key frame data storage means stores the attribute values of the key frame separately from the original video, so that the key frame can be re-edited any number of times from any time. It can be performed. Further, by providing the reproduction speed setting means, it is possible to reduce the reproduction speed of the original video and the effect video to a speed that can be easily processed by the operator, and the operator can edit the key frame data slowly.

In the present embodiment, the effect image is described as an example of the effect image. However, effects such as wiping, zooming, and cutting the image with a figure other than a rectangle may be used.
These are all modes of the key frame, and the attribute values are stored in the key frame data storage unit.

Although the editing instruction means is a mouse, an input device dedicated to editing such as a jog pad may be used.
Further, although the reproduction speed is set to be lower than the normal reproduction speed by the reproduction speed setting means, it is also possible to set the reproduction speed faster according to the skill level of the editing work of the operator.

[0038]

As described above, according to the present invention, the key frame data can be re-edited by storing the attribute values of the key frames, and the effect video can be edited while reproducing the video at a desired speed. It can be performed.

[Brief description of the drawings]

FIG. 1 is a block diagram of a video editing device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a monitor display of the video editing device according to the embodiment of the present invention.

FIG. 3 is an explanatory diagram of key frame generation and interpolation processing according to the embodiment of the present invention.

FIG. 4 is a diagram showing a state of a video editing operation.

FIG. 5 is a block diagram of a conventional video generation device.

[Explanation of symbols]

 101 key frame data storage means 102 key frame data editing means 103 key frame data interpolation means 104 video data storage means 105 video processing means 106 editing instruction means 107 clock signal generation means 108 video playback means 109 playback speed setting means 110 video synthesis means 111 Monitor 112 Video recording device 113 Broadcasting device 201 Display screen of first video data 202 Display screen of second video data 203 Editing instruction means 204 Playback speed setting means 205 Code indicating key frame creation 206 Time axis 401 Key frame

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Claims (4)

[Claims] An image for editing an image in which a key frame is superimposed on the original image by simultaneously reproducing an original image stored in an image storage means and a key frame added to the original image on a monitor. In the editing apparatus, video playback means for playing back the original video and the effect video displayed in the key frame in synchronization with each other; and arranging the key frame in the original video in a predetermined mode. A key frame data editing unit that derives the attribute value of the key frame as an attribute value of the key frame; and a key frame data storage unit that stores the attribute value of the key frame in synchronization with the original video. apparatus. 2. The video editing apparatus according to claim 1, further comprising a reproduction speed setting unit for setting a reproduction speed of the original video and the effect video. 3. The key frame data editing means which reproduces the original video and the key frame from a predetermined time, arranges the key frame in a predetermined mode, and resets an attribute value of the key frame. Claim 1.
The video editing device according to item 1. 4. The video editing apparatus according to claim 1, further comprising key frame data interpolation means for interpolating an attribute value of the key frame between a specific time and another specific time.