JPH0723329A - Video editor - Google Patents

Abstract

PURPOSE:To attain natural scene transfer by storing an image and a sound for the end part of a preceding scene in a picture memory and a sound memory at the time of edition, reading out the stored data at the starting part of the succeeding scene and superposing the read contents to the image and sound of the succeeding scene. CONSTITUTION:Scenes consisting of an image A, a sound A, an image B, and a sound B are connectively recorded in a video tape with intervals. The video tape is reproduced by a reproducing VTR 1 and the reproduced contents are connectively edited. Namely the image A and the sound A are reproduced by the VTR 1 at first and recorded in a recording VTR 2 through gain control parts 35, 36. When operation information is inputted from a switch part 33 at the end point of the image A, the final scene of the image A is stored in a frame memory 30. On the other hand, a memory 31 records the sound signal A reproduced from the VTR 1. The VTR 1 is driven, and at the start point of the scene of the image B, the image A is reproduced from the memory 30 and superposed to the image B by an adding part 38. While reproducing the sound A from the memory 31, the reproduced sound A is superposed to the sound B by an adding part 39.

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 for performing video editing accompanied by scene changes such as overlap in video production.

[0002]

2. Description of the Related Art An editing technique in which two video recording / reproducing devices (VTRs, etc.) are prepared and the reproduction outputs thereof are switched or mixed to form one video tape is generally referred to as an AB roll, which is a basic video editing. Has been done.

FIG. 5 shows a conventional example of a video editing apparatus capable of performing such an AB roll. In the figure, 1 and 1'are two playback VTRs for playing back material images, and 3 "is a playback VTR.
An image editing device 2 for editing the reproduced images of the TRs 1 and 1 ′ is a recording VTR for recording the image edited by the image editing device 3 ″ on a tape.

The video editing apparatus 3 "includes a control generation unit 32", a switch unit 33 "including various operation switches, gain control units 34 to 37, and addition units 38 and 39.
The video signals from the reproduction VTRs 1 and 1'of the stage are gain-controlled by the gain control units 34 and 35, respectively combined by the adding unit 38, and output as an edited video output. Similarly,
The audio signals from the two reproduction VTRs 1 and 1'are gain-controlled by the gain control units 36 and 37, respectively, synthesized by the adding unit 39, and output as an edited audio output. In addition, the control generation unit 32 ″ controls each VTR 1, 1 ′ and 2 and the gain control unit 34 based on the operation information input from the switch unit 33 ″.
Generate control signals for ~ 37.

The operation when the two video images A and B are overlapped at the conversion scene when the video image A scene and the video image B scene are joined by using the video image editing device 3 "will be described below. As shown in FIG. 6, in the overlap, the video A and the video B are separately recorded on the two VTRs 1 and 1 ', respectively, and these two VTRs are recorded.
TR1 and 1'are driven synchronously, and video A is faded out and subsequent video B is faded in at the joining portion of the scene. Overlapping video is a VTR for recording.
Record to 2. At this time, as for the voice, the voice A is gradually attenuated and the voice B is gradually increased in the overlap portion to synthesize the voice. By thus overlapping the transition scene, it is possible to create a specific video effect of connecting the afterglow of the video of the previous scene to the next scene.

On the other hand, for a general user, a dedicated device is required to prepare two VTRs for reproduction and to synchronize the reproduction outputs of these two units, and the system becomes expensive. Video editing is difficult to achieve. In addition, a beginner of video production often uses one video camera to connect and record images on one video tape when collecting images, but using the above two VTRs for reproduction. A video editing device for editing is not suitable for editing such a spliced and recorded video tape.

However, when an attempt is made to edit using only one VTR for reproduction, it is difficult to overlap the two images A and B at the same time as in the above-mentioned image editing apparatus, so it is difficult to overlap them. , Therefore, it was not possible to perform screen conversion with a high image effect.

Therefore, conventionally, a technique called a pseudo AB roll is used in editing in which only one VTR is used for reproduction. In this pseudo AB roll, a frame memory that can store one screen of a still image is provided, and while the video is played back by one VTR for playback, the final screen of the previous scene is frozen at the joining part of the video. Then, the playback VTR is driven to the part of the scene to be connected next, and at the start of the video scene to be connected, the freeze image of the last screen of the previous scene is read from the frame memory and this freeze is performed. The image is added to the image from the playback VTR to perform overlap editing.

[0009]

However, the pseudo-A
In the B-roll technique, the final screen freezes and the sound stops at the same time, so there is a problem that unnaturalness remains in the conversion to the next scene. That is, in the case of overlapping with a pseudo AB roll, at the turning point of the scene,
The final screen of the scene so far becomes a still image and gradually changes to the video of the next scene, so that the screen can be effectively switched while leaving the lingering sound of the previous scene. This is because the sound of the scene suddenly cuts off when it becomes a still image.

The present invention has been made in view of the above problems, and an object of the present invention is so-called pseudo AB.
In the roll technique, it is to connect the afterglow of the previous scene to the next scene in a natural manner so that the sound can be changed.

[0011]

In order to solve the above-mentioned problems, the video editing apparatus of the present invention is, in one form, an edit for connecting desired scenes among time-series audio-video materials. A video editing device that performs at least an image memory that can store still image video and an audio memory that can store audio for a certain period of time. The video and audio of the end part of is stored in the image memory and audio memory respectively, and the video of the end part of the previous scene is read from the image memory at the start part of the next scene and superimposed on the video of the next scene. The audio of the end part of the previous scene is read out and superposed on the audio of the next scene.

In each of the above video editing devices, the video stored in the image memory is a still image obtained by freezing the last scene of the previous scene, and the audio stored in the audio memory is audio for a certain time after the frozen time. , It can be configured to connect the still image and the sound of the end part of the previous scene by overlapping with the video and the sound of the next scene.

[0013]

When the scene-to-scene connection is edited, the video and audio of the end portion of the previous scene are held in the image memory and the audio memory, respectively. Then, at the start of the next scene, the video of the end of the previous scene is read from the image memory and superimposed on the video of the next scene, and the audio of the end of the previous scene is read from the audio memory and superimposed on the audio of the next scene. As a result, the sound of the previous scene is not suddenly interrupted at the connecting portion of the sound, and a natural scene change can be realized.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a video editing apparatus as an embodiment of the present invention. In the figure, 1 is a playback VTR, 2 is a recording VT
R and 3 are video editing devices. The video editing apparatus 3 has the control generation unit 32, the switch unit 33, the gain control units 34 to 37, and the addition units 38 and 39 in the same manner as in the past, and also has a frame memory 30 that stores and holds a still image signal for one screen, and a predetermined time. A voice memory 31 for storing and holding a long voice signal is newly provided.

The video signal from the reproducing VTR 1 is input to the gain control section 35 and also to the frame memory 30 for storing and holding the still image signal. The still image signal stored in the frame memory 30 is configured to be repeatedly read at the same frame cycle as that of a normal video signal and can be input to the gain control unit 34. The still image signal from the gain control unit 34 Is added to the video signal from the gain control unit 35 by the adding unit 38 and output as a video. Similarly, the audio signal is also input to the gain control unit 36 and the audio memory 31. The audio signal read from the audio memory 31 is input to the gain controller 37, added to the audio signal from the gain controller 36 by the adder 39, and output as audio.

The operation when the screen is changed by using the apparatus of this embodiment will be described below with reference to FIG. Now, a scene consisting of video A and audio A and a scene consisting of video B and audio B are recorded on a single videotape at intervals, and these are reproduced using one VTR1 for reproduction. Then, it is assumed that the images are edited while connecting the images A and B with overlap.

First, the reproducing VTR 1 is operated to reproduce the video A and the audio A, and the video A and the audio A are output as the video output and the audio output via the gain control units 35 and 36, respectively.
Record on R2. At this time, the gain control units 34 and 37 are controlled by the control generation unit 32 so that the gain is zero so that each signal from the frame memory 30 and the audio memory 31 does not leak into the video output / audio output. To

When the operation information is input from the switch unit 33 at the end point (that is, the scene change point) of the scene of the image A, the final scene of the scene is held in the frame memory 30 as a freeze picture. On the other hand, the audio memory 31 is a playback VT.
Start recording the audio signal from R1. VT for reproduction
The R1 is controlled by the control generator 32 so as to be stopped after continuing the reproduction for a predetermined time from this turning point. Therefore, the audio signal of the scene after the screen freeze point is recorded in the audio memory 31 for a predetermined time length.

After recording the audio signal A, the reproducing VTR 1
Further drive to the scene of image B. At the start point of the scene of the image B, the freeze image of the previous scene is reproduced from the frame memory 30, the gain control units 34 and 35 adjust so as to overlap with the image B, and the addition unit 38 adds them.

At the same time, the audio A of the previous scene is reproduced from the audio memory 31 while being overlapped with the audio B of the next scene. In this way, the freeze image A of the final screen of the previous scene and the audio A of the predetermined length corresponding to the screen are gradually attenuated and superimposed on the video B and the audio B of the next scene, and You can realize a natural screen expansion to the scene.

In the above-mentioned embodiment, it is not limited whether the video signal and the audio signal are analog-recorded or digital-recorded in the reproduction VTR. The value read from is stored in the memory as it is, but in the case of analog recording, the read value is converted into a digital value by the A / D converter at a predetermined sampling rate and then stored in the memory. To be done.

FIG. 3 shows a video editing apparatus as another embodiment of the present invention. In this example, when the video / audio of the preceding and following scenes overlap at the screen turning point, a special effect can be added to the sound of the previous scene at the connecting part, and the sound at the connecting part is We are trying to make the screen transition more expressive without being monotonous.

The difference from the above embodiment is that the voice memory 31
That is, the audio signal read from is input to the special reproduction section 310 to give a special effect, and then superimposed on the audio signal from the reproduction VTR 1 via the gain control section 37. As a result, as shown in FIG. 4, the audio signal A to which the special effect is added is overlapped with the audio signal B of the next scene. Here, as the special effect to be given, for example, the sound near the final scene of the previous scene is repeatedly played (for this, it is effective to detect the sound zero-cross point and repeat it at the break of the word), and the reverberation effect. It is possible to give or change the pronunciation speed.

In carrying out the present invention, various modifications other than the above-described embodiments are possible. For example, in the above-described embodiment, the sound after the frozen screen is accumulated for a certain period of time and superimposed on the sound of the next scene. However, the length of the accumulated sound can be changed from the image freeze point, for example. It is also possible to set the point up to the zero cross point of the voice (therefore, the point where the voice is cut off), which makes it possible to change the scene with a more natural feeling, such as changing the voice at the break of words.

Further, in the above-mentioned embodiment, the final scene of the previous scene is frozen and overlapped with the video of the next scene as a still picture, but this is due to the limitation that the image memory to be used should be constructed with a small capacity. Therefore, when using a large-capacity image memory that can record moving images for a predetermined time as the image memory, or when recording while compressing video with a video codec even with a small capacity, before the screen turning point. The video of the scene can be accumulated as a moving image for a predetermined period of time in the same manner as the audio signal, and can be overlapped with the start portion of the video of the next scene. At this time, it is also possible to perform special reproduction such as repetitive reproduction of a video of a predetermined time length of the previous scene or reproduction at different speeds.

The configuration of the memory circuit for storing the video and audio at the scene change point of the previous scene is not limited to the configuration of the above-mentioned embodiment. For example, the video signals from the reproducing VTR 1 are configured to be input to the gain control units 34 and 35 via separate image memories, and when the previous scene is frozen, the video signals to the image memories on the side are input. The configuration may be such that writing is stopped.

In the above embodiment, the audio / video as the material is reproduced by the reproducing VTR and input to the video editing apparatus. However, the audio taken directly by the video camera instead of the reproducing VTR is used. -It is also possible to use the video by sequentially editing it with a video editing device and recording it on a recording VTR.

[0028]

As described above, according to the present invention, even in the so-called pseudo AB roll technique, the afterglow of the preceding scene can be connected to the next scene in a natural form without being discontinuously interrupted. You will be able to change scenes. Also, by giving special effects to the sound of the previous scene at the connecting part, the scene can be changed more expressively.

[Brief description of drawings]

FIG. 1 is a block diagram showing a video editing apparatus as an embodiment of the present invention.

FIG. 2 is an operation explanatory view of the apparatus of the embodiment.

FIG. 3 is a block diagram showing a video editing apparatus as another embodiment of the present invention.

FIG. 4 is a diagram for explaining the operation of another embodiment of the device.

FIG. 5 is a block diagram showing a conventional example of a video editing device.

FIG. 6 is an operation explanatory diagram of a conventional device.

[Explanation of symbols]

1, 1'playback VTR 2 recording VTR 3, 3 ', 3 "video editing device 30 frame memory 31 audio memory 32 control generation unit 33 switch unit 34 to 37 gain control unit 38, 39 adder unit 310 special playback unit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical display location H04N 5/937 5/93 7734-5C H04N 5/93 C 7734-5C G 8224-5D G11B 27 / 02 C

Claims (2)

[Claims] 1. A video editing apparatus for performing editing by connecting desired scenes among time-series audio / video materials, and an image memory (3) capable of storing at least still video.
0) and a voice memory (3
1), the image and the sound of the end portion of the previous scene are held in the image memory and the sound memory respectively when the scenes are edited to connect the scenes, and the image is stored at the start portion of the next scene. A video edit configured to read the video of the end of the previous scene from the memory and superimpose it on the video of the next scene, and read the audio of the end of the previous scene from the audio memory and superimpose it on the audio of the next scene apparatus. 2. The image stored in the image memory is a still image obtained by freezing the last scene of the previous scene, and the audio stored in the audio memory is audio for a certain time period from the time of the freeze, The video editing apparatus according to claim 1, wherein the still image and the sound of the end portion of the scene are overlapped with the video and the sound of the next scene to be connected.