JPH0438743A - Controlling for editing - Google Patents

Abstract

PURPOSE:To absorb the instability of the change of rotational angular velocity at the time of turning a dial by a finger, and to attain both the retention of constant velocity and responsibility by letting relation between dial rotation angular velocity and VTR reproducing velocity have hysteresis. CONSTITUTION:When dial rotation is slowed by a dial 7 while a VTR runs at a certain velocity, a reproducing velocity determining means 9 compares the angular velocity detected by a rotational angular velocity/rotating direction detecting means 8 with threshold data corresponding to present velocity read out from a VTR reproducing velocity memory 11. Then, if the angular velocity is smaller, the VTR velocity is changed into the velocity smaller by one step. At that velocity, the dial rotation is raised again, and if the angular velocity is smaller than the threshold data, the VTR velocity does not change. When the dial rotation is raised further, and the angular velocity exceeds that value, the VTR velocity is changed. Thus, a sound can be easily edited, and operability can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an editing controller that is effective for editing a medium on which video and audio are recorded using a VTR etc., especially based on audio. be.

Conventional technology When editing a VTR, etc., the video and audio obtained by playing back the videotape installed in the source VTR are transferred to the recording side VTR.
This is done by repeatedly copying to a specified location on a video tape attached to the TR, and a conventional example will be explained with reference to FIG.

1 is a source side VTR, and 2 is a recording side VTR. Reference numeral 3 denotes an editing controller, which has an editing point memory 4, source side VTR control instruction means 5, and recording side VTR control instruction means 6.

When actually editing, normally first the source side IN point data, OUT point data, recording side IN point data, and OUT are stored in the editing point memory 4 of the editing controller 3.
By registering the point data as a time code and controlling each VTR by the source side and recording side VTR control instruction means 5.6 based on this data, copying, processing, etc. of video and audio are performed many times. .

At this time, if you want to determine the editing point with the video as the main focus, operate the source VTR and recording VTR individually, freeze the image at the desired frame, and check the time code at that point. Just register. However, when editing mainly audio, for example, when editing a part of a conversation, if you use V
In this case, since no sound is played back, it is difficult to identify the frame in which the voice occurs. In this case, the editing point is determined by setting the VTR to low-speed playback and checking the frames in which the audio is recorded.

In the case of FIG. 3, the dial 7 of the editing controller 3 is rotated with a finger or the like, and the low-speed VTR is adjusted according to the rotation.
By performing playback, an edit point is searched for. For this purpose, the rotational angular velocity and direction of the dial are detected by the rotational angular velocity and direction detection means 8, and from this data, the VTR speed corresponding to the dial rotational angular velocity is detected. The determining means 9 determines the VTR playback speed, and depending on the result, the source side and recording side VTR control instruction means 5
, 6 control each VTR, thereby performing reproduction of the VTR.

In the past, when determining the VTR speed corresponding to the rotational angular velocity of the dial, the VTR speed was arbitrarily assigned according to the value of the dial rotational angular velocity, as shown in FIG. In this conventional example, when the value of the dial rotation angular velocity is in the range between D and Zi, the V'FR velocity is Sl.
become.

In addition, in the case of a dial or a single controller, ten dial control switching means are used to switch between the source side and the recording side. Some controllers have dedicated dials for the source and recording sides.

Problems to be Solved by the Invention However, in order to check the audio recorded at low speed using the jog dial, it is necessary to maintain a constant speed, but it is not necessary to find the frame where the audio starts or ends. In order to achieve this, it is necessary to make the VTR respond immediately to the start and stop of dial rotation, and to play or stop the video. That is, responsiveness is required. In the case of an editing controller, responsiveness of several tens of milliseconds or less is required.

Therefore, constant speed playback and responsiveness are required for audio editing. For responsiveness, it is sufficient to make the dial light, make it follow the movement of the finger, detect the rotational angular velocity quickly, and output it to the VTR immediately. However, when rotating a dial with a finger, is it possible for a human finger to keep the time for one rotation constant to some extent?The human structure is not suitable for keeping each rotation speed constant at all times. Therefore, the angular velocity change is very large.

Therefore, if the VTR speed is determined by directly applying this to the table shown in FIG. 4, the playback speed will always change. Therefore, in order to obtain a constant speed, conventionally,
The following methods have been used:

(1) A method to absorb the instability of the hand by increasing the weight of the dial and increasing its moment of inertia.

This does make it easier to maintain a constant speed, but in terms of responsiveness, the moment of inertia acts in the opposite way, and in order to rapidly rotate or stop a gear with a large moment of inertia, it is difficult to The disadvantage was that it placed a large burden on the staff and was impractical.

(2) A method of absorbing hand instability by using a timer to average the rotational angular velocity of the dial over a certain period of time.

Due to the way humans move their fingers, setting this period to a value of about 1 second is effective in maintaining a constant speed, but during the counting time T (1 second in this example), Since it does not respond to changes in rotational angular velocity, it has the disadvantage of poor responsiveness.

As mentioned above, the present invention satisfies the two requirements of maintaining a constant speed and responsiveness, which were previously difficult to achieve at the same time.
This is an attempt to provide a means to solve the problem of simultaneously satisfying the following.

Means for Solving the Problems In order to achieve the above object, the present invention provides a dial;
means for detecting the rotational angular velocity; means for detecting the rotational direction; and means for instructing control including playback speed, and when determining the playback speed of the VTR, the threshold for decreasing the speed by one step is lower than the threshold for increasing the speed by one step. This is the setting.

Effect of the present invention With the above-described configuration, by providing hysteresis in the relationship between the dial rotational angular velocity and the VTR playback speed, the instability of the change in the rotational angular velocity when turning the dial with a finger can be absorbed and the stability can be maintained. This makes it possible to maintain both speed and responsiveness.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIG.

1 Huff-side VTR, 2 recording side VTR, 3+;1
This is an editing controller that includes an editing point memory 4 and a source side VTR control instruction means 5.
, a recording side VTR control instruction means 6, a dial 7, a rotational angular velocity and rotational direction detection means 8, and a VTR reproduction speed determination means 9 for determining a plurality of stages of reproduction speed of the VTR corresponding to the rotational angular velocity of the dial 7. , a VTR control output switching means 10, and a VTR speed memory 11.

Further, the VTR playback speed determining means 9 determines the speed according to the relationship shown in FIG.

In the diagram, S 1, S 2. ,S,,(
;i, VT l17) The speed is Sl<S<,
, <So. Also, Dn, l) and ri.

1. are the minimum and maximum dial rotation angular velocities assigned to the VTRTR speed trace, respectively, and D o−+,
There is a relationship h > D ol.

In the above configuration, the operation will be explained. The dial has already been turned and the VTR is at speed S. If the dial rotation is slowed down when and threshold data D corresponding to the current speed S and 1 read from the VTR speed memory of No. 11. l
D8 is better than Do and Li. If it is smaller than 1, the VTR speed is changed to one step slower than S n-1. Its speed S. At -1, increase the dial rotation again,
Angular velocity increases. Even if it reaches 1, D n-+, b > D
Since there is a relationship between n and +, the VTR speed does not change.

If it becomes even faster and becomes faster than Dl,1, VT
R speed is changed to 8.1.

In the controller configured in this way, when an attempt is made to maintain the speed and SN by rotating the dial 7 with a finger, the dial operation by the finger changes the range of the rotational angular velocity to Ss, l and S81.
．． It is sufficient to keep it within the range of , so the conventional S
It is easier to maintain the same speed than to maintain the + range. Also, if you stop the rotation and reduce the angular velocity to below DOh, V
The TR can be kept stationary, allowing for highly responsive operation.

Although the rotation direction is not specified in the above example, when the dial 7 is rotated to the right, the VTR advances the tape, and when the dial 7 is rotated to the left, the tape is moved backward.

If the dial 7 is a single controller, the dial control switching means 10 is used to switch between the source side and the recording side. It is also possible to provide dedicated dials for each number on the source side and recording side.

Effects of the Invention As is clear from the above explanation, according to the present invention, the VT
When determining the playback speed of R, by setting a lower threshold for dial rotational angular velocity when decreasing the speed by one level than when increasing the speed by one level, the dial rotational angular velocity and VTR playback can be set lower. By adding hysteresis to the relationship with speed, it is possible to absorb changes in the rotational angular velocity when turning the dial with your finger, allowing you to maintain a constant speed and maintain responsiveness, making it easier to edit audio. It is possible to provide an easy-to-use editing controller that can be used to edit images.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the editing controller of the present invention, and FIG. 2 is for explaining the relationship between the dial rotation angular velocity of the embodiment of the editing controller of the present invention and the playback speed of the VTR. FIG. 3 is a block diagram showing the configuration of a conventional editing controller, and FIG. 4 is an explanatory diagram illustrating the relationship between the dial rotation angular velocity of the conventional editing controller and the playback speed of a VTR. 5... Source side VTR control instruction means, 6...
. . . Recording side VTR control instruction means, 7 . . . Dial, 8 . . . Rotation angular velocity and rotation direction detection means, 9 . . . VTR playback speed determination means, 11 .
VTR speed measurement

Claims (1)

[Claims] A dial, means for detecting its rotational angular velocity, means for detecting its rotational direction, and a memory for the playback speed of the VTR;
means for determining a plurality of playback speeds of the VTR corresponding to the rotational angular velocity of the dial; and means for instructing the VTR to control the VTR including the playback speed; An editing controller characterized in that a threshold value for decreasing the rotational angular velocity of the dial by one level is set lower than a threshold value for decreasing the rotational angular velocity of the dial by one level.