JPH06125527A - Editing device - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain an editing device that reduces the enormous amount of time required to search for images in which the same image is continuously recorded for a long time, such as monitoring. [Structure] Data is read into two frame memories 8 for storing images which are temporally different, the two images are compared, and a motion detection circuit 10 determines whether there is a motion. Edit the record.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an editing apparatus for extracting and editing and recording only a moving portion from a medium on which an image signal or the like, which has not moved for a long time, is recorded.

[0002]

2. Description of the Related Art Image signals and the like can be recorded and controlled on a video tape or an optical disk in frame units. By utilizing this, recording is performed on the medium in frame units at a certain fixed period (every 1 second or 5 seconds, etc.) and is recorded for a long time for monitoring or remote recording.
A conventional apparatus for recording / reproducing for a long time will be described below.

FIG. 8 shows the structure of a conventional long-time recording / reproducing apparatus. Reference numeral 31 is an input circuit for receiving an input image signal,
Reference numeral 32 is a recording / reproducing circuit for recording or reproducing on the medium 34, 33 is a circuit for outputting an image from the medium 34, and 35 is a timer for generating a recording control signal to the recording / reproducing circuit 32 at a certain time period. It is a control circuit.

In the recording / reproducing apparatus configured as above, the recording time of the medium is 60 minutes or 60 minutes × 60 seconds ×
It is assumed that 30 frames (in the case of NTSC general television signal) = 108000 frames can be recorded. When the timer control circuit 35 sends a timer control signal to the recording / reproducing circuit 32, for example, once every 5 seconds, the recording / reproducing circuit 32 performs recording for one frame at that time. FIG. 9 illustrates a configuration in which an image frame is recorded on the medium at time intervals T from time t. In the above example, T
= 5 seconds, 108000 frames / 5 seconds = 2160
Recording can be continued for 0 frame = about 12 hours.

[0005]

However, in the above configuration, most of the recording frames often record exactly the same image in a state where no abnormality occurs when used for night monitoring or the like. Therefore, in the case of recording for a long time, there is a problem that a large amount of medium is secured and the time required for searching for an abnormal image during reproduction becomes enormous.

The present invention solves the above-mentioned problems. When the same image in the reproduction medium continues, the recording / editing is not performed on another medium, but only on the case of a different image. The purpose is to provide a device.

[0007]

In order to achieve this object, an editing apparatus of the present invention controls a reproducing means for reproducing a signal such as a time code, an image and a sound from a medium in which the signal is recorded, and the reproducing means. Reproduction control means, time code separation means for separating a time code from the reproduced signal, time code storage means for storing the separated time code according to the output of the motion detection means, and the stored time. Time code output means for outputting a code,
Image separation means for separating an image from the reproduced signal, motion detection frame memory means for storing the separated image, delay frame memory means for delaying the separated image for n seconds, and the motion Motion detection means for obtaining motion detection from the image of the detection frame memory means,
Recording control means for controlling the recording means according to the output of the motion detection means, delay time setting means for inputting the setting of the output time of the delay frame memory means, and the delay frame under the control of the recording control means. Recording means for recording the output of the memory means on a medium.

Further, the editing apparatus of the present invention comprises a reproducing means for reproducing a signal from a medium on which a signal such as a time code, an image and a sound is recorded, a reproducing control means for controlling the reproducing means, and a reproducing signal from the reproduced signal. Time code separating means for separating the time code, time code input means for inputting the time code, delay time setting means for setting the delay time for setting the recording start point, and delay set from the input time code value Time code subtraction means for subtracting time, time code comparison means for comparing the value from the time code separation means with the value from the time code subtraction means and outputting a recording control signal, and in response to the recording control signal A recording control means for controlling the recording means; and a recording means for recording a signal reproduced by the control of the recording control means on a medium. And it is characterized in Rukoto.

[0009]

With the above-described structure, the present invention sequentially detects the image to be reproduced frame by frame in the memory, and detects the motion by comparing the current frame image data with the image data in the frame memory one frame before. Then, only when it is determined that there is movement, the image is recorded and edited on another medium. Further, since the image is recorded from the image n seconds before the motion is detected, a frame memory for delaying the image to be reproduced by n seconds can be prepared and taken out and recorded.

Further, according to the present invention, when the recording / editing is not performed in real time, the time code of the reproduced image in which the motion is detected is stored and output. When recording and editing, the time code is input, the time code of the reproduced image is compared, and recording is performed from the time when they match.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of an editing apparatus according to the first embodiment of the present invention. When the reproduction control circuit 3 issues a reproduction command for the medium A1, the reproduction circuit 2 reproduces signals such as time codes, images, and sounds recorded on the medium A1. FIG. 2 shows an example of the reproduced signal. One vertical period indicates a section between vertical synchronizing signals, which is called a field, and is 60 Hz for a television signal. During this vertical period, the hour is displayed at the beginning with the image and audio data:
The time code is recorded in units such as minutes: seconds: frames. The playback device, when a certain time code is specified,
You can search the time code value from the signal and start playback from the specified position.

The time code separation circuit 4 separates the time code from the reproduced signal. The time code storage circuit 5 stores and stores the time code value according to the output of the motion detection circuit 10. The time code output circuit 6 outputs these time code values.

On the other hand, the image data separating circuit 7 separates the image signal from the reproduced signal. The separated image data is stored for each frame in the motion detection frame memory 8 and the delay frame memory 9.

FIG. 3 shows an example of a method for detecting motion.
FIG. 3A shows a time t when the frame memory for motion detection is present.
3B and FIG. 3B show an example of the image data at time (t-1) one frame before the time t. FIG. 3C is a diagram in which the image data of FIGS. 3A and 3B are subdivided in the vertical direction and the horizontal direction, and the subdivided blocks are compared. The mark ● in FIG. 3 (c) indicates a portion where there is a difference between the two data. The larger the number, the more the movement is determined.

Another example of the method for detecting motion will be described with reference to FIG. The current time t in one frame memory (t)
The image at is stored in another frame memory (t-1)
It is assumed that the image of one frame before the current time t is stored in. Representation of a block of an image in the frame memory is x-axis in the horizontal direction and y-axis in the vertical direction. Time t
The pixel configuration of the image block (x, y) of the frame memory is 8 pixels i = 0 to 7 in the horizontal direction and j = 0 in the vertical direction.
-7 pixels. Similarly, the pixel block of the frame memory one frame before the time t has the same configuration. The value of the pixel at time t, horizontal i = 2, and vertical j = 5 of the block (x, y) is P (t, x, y, 2,5). I,
When expressed using j, it becomes P (t, x, y, i, j). The value at the same point in time (t-1) is similarly P (t-
1, x, y, i, j). The motion amount M is defined by (Equation 1) using the above expression.

[0017]

[Equation 1]

In summary, the difference between each 64 pixels of the (x, y) block at time t and time (t-1) is first calculated. Next, the (x, y) block at time t and the time (t
-1) (x-1, y-1) block, (x, y-1)
Block, (x + 1, y-1) block, (x-1,
y) block, (x + 1, y) block, (x-1, y)
+1) block, (x, y + 1) block, (x + 1,
y + 1) Differences are similarly obtained between blocks. The amount of movement for each of these 9 blocks is obtained. If both image data are the same, this motion amount is calculated by using both (x,
From the (y) block, ΣP (t, x, y, i, j) -P (t-1, x, y, i, j) = 0. When the amount of movement is 0 or a small value, it is determined that there is no movement. The reason why 9 blocks are also calculated is that it is determined that there is no motion even if only one pixel moves for a fine motion.

As in these examples, the motion is detected by the motion detection circuit 1.
Detected at 0. This output is transmitted to the time code storage circuit 5 and becomes a time code storage control signal. The other is transmitted to the recording control circuit 11. When the recording control circuit 11 receives this control signal, the recording circuit 13
Is controlled to record the image data from the delay frame memory 9 on the medium B14.

FIG. 5 schematically shows an example of a group of motion detection signals ↑ and a motion detection section when the horizontal axis is a time function. This motion detection section is recorded on the medium B14.

In general, a long-term event change may be monitored even slightly before the change time, for example, the movement of the image signal from n seconds before. The delay time setting circuit 12 has n
Is the part that determines the value of. The value of n set here is
When received by the recording control circuit 11, the image position output by the delay frame memory 9 is controlled.

FIG. 6 shows a storage sequence of the image data sequence in the delay frame memory 9. FIG. 6A shows the image data sequence input to the delay frame memory 9, and FIG. 6B shows the image data sequence after the delay time n. If the delay frame memory 9 is configured to be able to store an image data string larger than the set delay time n and output an image data string after an arbitrary delay time, the processing and editing of the image data is also possible. Can be done in real time and arbitrarily.

FIG. 7 shows the structure of an editing apparatus according to the second embodiment of the present invention. The same parts as in FIG. 1 of the first embodiment are
Description will be given with the same reference numerals. When the reproduction control circuit 3 issues a reproduction command for the medium A1, the reproduction circuit 2 reproduces signals such as time codes, images, and sounds recorded on the medium A1. The time code separation circuit 4 separates the time code from the reproduced signal.

On the other hand, the time code input circuit 23 is shown in FIG.
This is a part for inputting a time code value corresponding to the output from the time code output circuit 6. Delay time setting circuit 12
Is a part for determining the value of n in advance. Both input values are transmitted to the time code subtraction circuit 22. Assuming that the set time code value is 12 minutes 34.000 frames and the set delay time value is 4 seconds, the time code subtraction circuit 22
Outputs the frame value of 12 minutes 30 seconds 00 to the time code comparison circuit 21. Here, the time code value read from the reproduction signal and, in this example, 12 minutes 30 seconds 00.
It is compared with the frame value, and if they match, it is transmitted to the recording control circuit 24. Based on the transmitted signal, the output signal of the reproducing circuit 2 is recorded on the medium B14 through the recording circuit 13. In the example of FIG. 7, data can be processed and edited in non-real time according to both set values.

As described above, according to this embodiment, only the moving portion is taken out from the medium in which the image in which the movement of the subject is small for a long time is recorded and recorded and edited in another medium to facilitate the search. Do it in a short time. Further, it is an editing device capable of reproducing and recording / editing regardless of real time or non-real time.

[0026]

As described above, according to the present invention,
Most of the recording frames often record the exact same image in a state where no abnormality occurs when used for applications such as nighttime monitoring. Therefore, the image recorded on the medium is reproduced, sequentially captured in the memory in frame units, and the motion is detected by comparing the current frame image data with the image data of the previous frame. Recorded and edited only different image sections without recording and editing. Further, a delay frame memory is provided to detect a motion in order to record and edit a time period farther than the motion detection point, thereby enabling a previously changed state. In addition, the time code value at the time of motion detection can be recorded and edited instead of in real time.

Therefore, by using the contents recorded and edited by the motion detection of the image data recorded for a long time for the search at the time of the abnormal image, the search time can be greatly reduced, and its practical effect is ,large.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an editing apparatus according to a first embodiment of the present invention.

FIG. 2 is a waveform chart showing an example of a reproduced signal in the first embodiment.

FIG. 3 is a schematic diagram showing an example of a motion detection method according to the first embodiment.

FIG. 4 is a schematic diagram showing an example of a motion detection method according to the first embodiment.

FIG. 5 is a timing chart showing a motion detection signal and a motion detection section in the first embodiment.

FIG. 6 is a schematic diagram showing storage of an image data string in a delay frame memory according to the first embodiment.

FIG. 7 is a block diagram showing a configuration of an editing apparatus according to a second embodiment of the present invention.

FIG. 8 is a block diagram showing the configuration of a conventional long-time recording / reproducing apparatus.

FIG. 9 is a schematic diagram showing a configuration in which a frame is recorded at every time T from the time when there is an image complaint on the medium in the conventional example.

[Explanation of symbols]

 1 medium A 2 reproduction circuit 3 reproduction control circuit 4 time code separation circuit 5 time code storage circuit 6 time code output circuit 7 image data separation circuit 8 motion detection frame memory 9 delay frame memory 10 motion detection circuit 11 recording control circuit 12 Delay time setting circuit 13 Recording circuit 14 Medium B 21 Time code comparison circuit 22 Time code subtraction circuit 23 Time code input circuit 24 Recording control circuit

Claims (2)

[Claims] 1. A reproducing means for reproducing a signal from a medium on which a signal such as a time code, an image and a sound is recorded, a reproducing control means for controlling the reproducing means, and a time code for separating a time code from the reproduced signal. Separation means, time code storage means for storing the separated time code according to the output of the motion detection means, time code output means for outputting the stored time code, and an image from the reproduced signal. Image separation means for separating, motion detection frame memory means for storing the separated image, delay frame memory means for delaying the separated image for n seconds, and image from the motion detection frame memory means Motion detection means for obtaining motion detection, recording control means for controlling the recording means according to the output of the motion detection means, and the delaying means Edit comprising: a delay time setting means for inputting a setting of the output time of the frame memory means; and a recording means for recording the output of the delay frame memory means on a medium under the control of the recording control means. apparatus. 2. A reproducing means for reproducing a signal from a medium on which a signal such as a time code, an image and a sound is recorded, a reproducing control means for controlling the reproducing means, and a time code for separating the time code from the reproduced signal. Separation means, time code input means for inputting the time code, delay time setting means for setting the delay time for setting the recording start point, and time code subtraction for subtracting the set delay time from the input time code value Means, time code comparing means for comparing the value from the time code separating means with the value from the time code subtracting means and outputting a recording control signal, and recording control for controlling the recording means according to the recording control signal. Means and the recording means for recording a signal reproduced by the control of the recording control means on a medium. Apparatus.