JPH0818906A - Picture signal processing method and picture signal processing unit - Google Patents

Abstract

PURPOSE:To record an important scene without missing of recording and to extend the entire recording time by eliminating the need for a trial shot by the user or minimizing number of times of trial shots without losing the shutter chance of scenes before and after a desired scene of an object in a rapid moving state. CONSTITUTION:A memory control circuit 4 records input video data continuously to a memory section 3 at a 1st time interval (interval of t1sec). When video data equivalent to n-fields are recorded continuously in the memory section 3 after the input of a trigger signal, a 1st discrimination circuit 7 provides an output of a 1st discrimination signal A representing the continuous recording. After the production of the 1st discrimination A, when video data equivalent to p-fields are recorded intermittently in the memory section 3 at a 2nd time interval (interval of t2sec, t2>t1), a 2nd discrimination circuit 12 provides an output of a 2nd discrimination signal B representing it. A recording control circuit 12 controls the processing unit to stop the recording of data to the memory section 3 based on the 2nd discrimination signal B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image signal processing method and an image signal processing apparatus for recording and reproducing an image signal, and more particularly to an image signal capable of recording and reproducing a moving image without missing a desired moment. The present invention relates to a processing method and an image signal processing device.

[0002]

2. Description of the Related Art Conventionally, in an image signal processing apparatus which is constructed by using a semiconductor memory (hereinafter, simply referred to as a memory) for recording and reproducing moving images, an input image signal is converted into digital image data, The image can be displayed by writing the image data in the memory for each field (or frame) and reading the image data in the memory.

In this image signal processing device, the memory for recording the input image signal needs to have a capacity for a desired recording time. For example, 4fsc (however, fsc is a color subcarrier frequency of 3.58MHz, so 4fsc = 1
If one field memory (memory capacity: 2 Mbits) is used to record one field of a luminance signal sampled at a sampling frequency of 4.3 MHz, 16 frames (that is, 32 fields, time) In order to record a luminance signal for about 0.5 second), 32 field memories are required.

By the way, a problem in actually using such a device is a recording time. That is, in order to extend the recording time, many field memories may be used, but there is a problem that the device itself becomes large and the cost becomes high. In order to solve this, there is a method called intermittent recording. That is, by recording at a constant time interval during recording, it is possible to extend the actual recording time as a result even if the same number of memories are used.

The image memory used has a small number of connections and is easy to control, and has separate ports for writing and reading data, which can be controlled independently. Because of its high speed, the FIFO (First In First Ou)
t) Memory is often used.

As an example of an image signal processing device using an image memory, an image recording device 30 for recording and reproducing a golf swing will be described with reference to FIG. The example of FIG. 17 shows a system having a memory for 60 fields and capable of recording / reproducing an image for 4 seconds by quadruple intermittent recording.

In the system shown in FIG. 17, a video signal input from the form photographing camera 31 is converted into an A / D converter 32.
It is digitized by and is recorded in the memory unit 33. The memory unit 33 continuously records the image signal input from the camera 31 in the memory at regular intervals.

As shown in FIG. 18, the memory section 33 has a structure in which 60 field memories 39 to 42 are connected in parallel, and output buffer amplifiers 43 to 46 are connected in series at the output terminals of the memories 39 to 42, respectively. The image data that is connected and input to the memory unit 33 is sequentially written from the first memory 39 through the input buffer amplifier 38 in units of four fields. The memory section 33 forms a loop, and after writing to the 60th memory 42, it is written again to the first memory 39. The microcomputer 35 controls writing and reading of the memories 39 to 42. To stop writing to the memory unit 33, the microcomputer 35 receives an impact signal from the sound sensor 34 that recognizes the moment of impact when the club head catches the ball, delays the impact signal for a certain period of time, and triggers to stop writing. This is done by creating a signal and sending it to each memory of the memory unit 33.

At the time of reproduction, the image data accumulated in the memory section 33 is read out in the order in which it was written, the luminance signal Y and the color signal C are processed, and then the original analog signal is converted by the D / A converter 36. It is converted and output as a video signal on the monitor 37 for display.

In the above configuration, the reason why writing is stopped after a certain time has elapsed after the impact signal is input is to center the reproduced image near the moment of impact when reproducing. If the whole is 4 seconds as in the example, it is sufficient to delay by 2 seconds.

If the time of the field recorded when receiving the write stop trigger signal is set to t = 0, the data written in the memory traces back four fields temporally as shown in FIG. Start field (-2
From the 40th field) to the write-stopped field (0th field), every four fields are continuously arranged in the written order.

The memory for recording the image signal is, for example,
Assuming that the component signals are 4: 1: 1 (luminance signal Y, color difference signals RY, BY), 2M for the luminance signal.
A bit field memory is required for each field, two for the luminance signal and one for the color difference signal, for a total of three. For this reason, if the above 4 seconds are continuously recorded with 60 fields per second, it will be 4 seconds x 60 fields x 3 = 720, which requires a very large amount of memory even for recording a short time. This is not practical because it increases the size of the device itself and increases the cost. Therefore, as in the above example, a method of reducing the number of used memories is often used by performing intermittent recording in which recording is performed at regular time intervals.

The recording interval is 1/60 when continuously recorded.
In contrast to this, in the case of quadruple intermittent recording as in this example, the interval is 4/60 seconds.

However, since this intermittent recording is performed at regular intervals, there is a problem that important scenes may be missed. The recording time interval when recording is performed in field units is 1/60 second interval, whereas it is 4 times that of 4 times intermittent recording, that is, 4/60.
If you have a scene you want to shoot during this interval, it will not be recorded.

Therefore, the intermittent recording time interval may be partially shortened, but in this case, the user must set a section for shortening the intermittent recording time interval, and several trial shots are performed. Therefore, there is a problem that it takes a lot of time and labor to determine the optimum section.

For example, when a golf swing is used as an input video signal, the most important image is near the moment of impact when the golf club catches the ball, but the movement of this part is very fast, and the intermittent four times as much as the above. In recording, there is a possibility that you may miss the shot. On the other hand, other parts are relatively slow in movement, and intermittent recording does not cause any problem.

As described above, in general, the important portion often moves fast, and unless the recording is performed at fine intervals, the most desired portion cannot be recorded. On the other hand, if the recording is made fine, there is a problem that the entire recording time becomes short because the number of memories is limited, and it is not possible to record all the desired scenes.

[0018]

As described above, in the conventional image signal processing apparatus, since the recording interval is always constant, if the recording interval is made fine, a very large amount of memory is required. If the recording time is extended, the recording interval must be wide (intermittent recording), and there is a problem that important parts are missed. If you try to shorten the time interval of intermittent recording for only some sections and try to record, the user has to take several trial shots to determine the optimum section, which is very troublesome. there were.

The present invention has been made in view of the above problems, and does not miss a part before and after a portion where a subject moves a lot (a scene to be photographed), or eliminates the need for a trial shot by the user or makes a trial shot. An object of the present invention is to provide an image signal processing method and an image signal processing device capable of recording the important part without omission by reducing the number of times of photographing as much as possible and extending the entire recording time.

[0020]

According to the first aspect of the present invention,
An image signal processing method for writing video data supplied as input to a memory means and reading the written video data for display, wherein the input video data is stored in the memory means until a trigger signal is input. Recording is continued in field (or frame) units, and after the trigger signal is input, n fields (or frames) (n
Is an integer) and the input video data is recorded in the first time interval, and thereafter, the input video data is recorded in a second time interval longer than the first time interval by p fields (or frames) (p is an integer). It is characterized by recording in.

According to a second aspect of the present invention, in the image signal processing method according to the first aspect, input video data for p fields (or frames) (p is an integer) is recorded in the memory means at a second time interval. At this time, when the memory capacity of the memory means is insufficient, the already recorded portion is overwritten and rerecorded.

According to a third aspect of the present invention, there is provided an image signal processing device for writing video data supplied as an input to a memory means, reading the written video data and displaying the read video data, wherein the input video data is stored in a field ( (Or frame) unit, and a first discriminating signal indicating that n fields (or frames) of image data (n is an integer) are recorded in the memory unit after the trigger signal is input. Outputting a first discriminating means and a second discriminating signal indicating that the video data for p fields (or frames) (p is an integer) after the generation of the first discriminating signal is recorded in the memory means. A second discriminating means and a recording / reproducing control for the memory means, so as to stop the recording in the memory means based on the second discriminating signal. And control means for controlling is obtained by including a recording time interval control means for controlling the recording time interval of said control unit based on the first determination signal.

According to a fourth aspect of the invention, in the image signal processing apparatus according to the third aspect, the recording time interval control means is arranged such that the recording time interval of the control means is usually the first time interval. The recording time interval is controlled so that the recording time interval is longer than the first time interval when the first determination signal is input.
It is characterized in that it is controlled so that the time interval becomes.

According to a fifth aspect of the present invention, in the image signal processing apparatus according to the third aspect, the control means, when recording in the memory means in a state where the recording time interval is the second time interval, When the memory capacity of the means is insufficient, it is characterized in that the already recorded portion is overwritten and re-recorded.

According to a sixth aspect of the present invention, there is provided an image signal processing method for writing video data supplied as an input to a memory means, and reading the written video data so that the video data can be displayed. At the same time, the video data, which is the recorded content of the first memory means before being written, is longer than the first time interval while being continuously recorded in the first memory means on a field (or frame) basis at the first time interval. It is characterized in that the data is read out at the second time interval and recorded in the second memory means in units of fields (or frames).

According to a seventh aspect of the present invention, there is provided an image signal processing method for writing video data supplied as an input to a memory means, and reading the written video data so that the video data can be displayed. At the same time, the video data, which is the recorded content of the first memory means before being written, is longer than the first time interval while being continuously recorded in the first memory means on a field (or frame) basis at the first time interval. At the same time as reading out at the second time interval, recording in the second memory means on a field (or frame) basis, and further stopping the write operation to the first and second memory means after inputting the trigger signal, at the same time The data is recorded in the third memory means in field (or frame) units at a third time interval longer than the first time interval.

The invention described in claim 8 is the image signal processing method according to claim 6 or 7, characterized in that the second time interval and the third time interval are the same time interval.

According to a ninth aspect of the present invention, there is provided an image signal processing device for writing video data supplied as an input into a memory means, and reading the written video data so that the video data can be displayed. A first memory unit for continuously recording at a first time interval in units of (or frames), and video data in field (or frame) units read from the first memory unit, at the first time interval. At the same time when the input video data is written to the second memory means for recording at a longer second time interval and the first memory means at the first time interval, the recorded contents of the first memory means before being written are used. And a control means for controlling such that certain video data is read at the second time interval and written in the second memory means.

According to a tenth aspect of the present invention, there is provided an image signal processing device for writing video data supplied as an input to a memory means, and reading the written video data so that the video data can be displayed. (Or frame) units for continuous recording at a first time interval, and field (or frame) unit image data read from the first memory unit are recorded at the first time. The second memory means for recording at a second time interval longer than the interval, and the write operation to the first and second memory means after the trigger signal is input are stopped, and at the same time, the input video data is recorded in the field (or frame). )
Third memory means for recording at a third time interval longer than the first time interval in units, and the input video data is written in the first memory means at the first time interval and at the same time before the writing. The video data, which is the recorded content of the first memory means, is controlled to be read at the second time interval and written to the second memory means, and after the input of the trigger signal, the first and second memory means are controlled. And a control means for controlling the input video data to be written in the third memory means at a third time interval.

The invention as defined in claim 11 is claim 9 or 1.
In the image signal processing device described in item 0, the second time interval and the third time interval are the same time interval.

According to a twelfth aspect of the present invention, in the image signal processing apparatus according to the tenth aspect, the control means writes the input video data in the first memory means at the first time interval and at the same time before writing. First means for controlling to read the video data, which is the recorded content of the first memory means, at the second time interval and write it to the second memory means; and At the same time when the write operation to the second memory means is stopped,
Second means for controlling the memory means for selecting and writing the input video data at the third time interval.

According to a thirteenth aspect of the present invention, there is provided an image signal processing method for writing video data supplied as an input into a memory means, and reading the written video data so that the video data can be displayed. During the period until the end, the input video data is stored in the memory means in field (or frame) units in n fields (or frames).
Minutes (n is an integer) are recorded at the first time interval while the field (or frame) of the memory means used for recording
A field that counts the number of memories, calculates the period from the operation start to the operation end of the subject based on the number of memories and the first time interval, and configures the field (or the field that configures the memory means based on the calculated period). It is characterized in that the recording time interval in the frame memory is reset to the second time interval.

According to a fourteenth aspect of the present invention, in the image signal processing method according to the thirteenth aspect, the second time interval is
In the period from the start of the operation of the subject to the end of the operation, input video data is set to a recording time interval for recording using all the number of field (or frame) memories constituting the memory means. To do.

According to a fifteenth aspect of the present invention, in the image signal processing method according to the thirteenth aspect, the amount of movement of the subject is detected in field (or frame) units during the period from the start of movement of the subject to the end of movement. It is characterized in that it is determined by the length of a period in which the amount of movement exceeds a predetermined value.

According to a sixteenth aspect of the present invention, there is provided an image signal processing device capable of writing video data supplied as an input into a memory means and reading the written video data to display the image data. A memory means for inputting video data corresponding to the end and recording the video data in field (or frame) units at a predetermined time interval, and recording / reproducing for this memory means are controlled. At the time of recording, In the recording from the memory means, after inputting a control signal that outputs a write signal to the memory means at a predetermined time interval during the period from the start of the operation of the subject to the end of the operation, and a trigger signal synchronized with the start of the operation of the subject. From the memory counter means for counting the number of used field (or frame) memories, A calculation unit that calculates a period from the start of the motion of the subject to the end of the motion from the number of field (or frame) memories used for recording and the predetermined time interval for the memory unit, and the calculation unit. A recording time interval control means for controlling resetting of the recording time interval of the control means so as to effectively use the field (or frame) memory constituting the memory means during a certain period. .

According to a seventeenth aspect of the present invention, there is provided an image signal processing device capable of writing video data supplied as an input to a memory means and reading the written video data to display the image data. And a determination means for determining whether or not the detection output of the detection means exceeds a certain value, and determining from the operation start to the operation end of the subject, and the detection means corresponding to the operation start to the operation end of the subject. Memory means for inputting video data to be recorded and recording the video data in field (or frame) units at a predetermined time interval, and for controlling recording and reproduction with respect to the memory means. Control means for outputting a write signal to the memory means at a predetermined time interval in the period determined by the above, and after the determination signal is input from the determination means, From the memory counter means for counting the number of field (or frame) memories used for recording in the memory means, the number of field (or frame) memories of this memory counter means, and the predetermined recording time interval for the memory means, The calculating means for calculating the period from the start of the movement of the subject to the end of the movement, and the control means for effectively using the field (or frame) memory constituting the memory means in the period calculated by the calculating means. And a recording time interval control means for controlling the recording time interval to be reset.

According to the eighteenth aspect of the present invention, in the image signal processing apparatus according to the sixteenth or seventeenth aspect, the recording time interval control means is a period from the operation start to the operation end of the subject calculated by the calculation means. In the above, the control means resets the recording time interval of the control means so as to maximize the use of all field (or frame) memories constituting the memory means.

According to a nineteenth aspect of the present invention, in the image signal processing apparatus according to the seventeenth aspect, the detecting means comprises means for detecting a moving portion of the input video data and outputting a pulse, and the discriminating means. Counts the number of pulses from the detection means in field (or frame) units,
It is characterized in that it comprises means for outputting a discrimination signal when the count value exceeds a predetermined value.

[0039]

According to the first aspect of the present invention, the input video data is recorded at the first time interval for a predetermined period from before the input of the trigger signal to after the input of the trigger signal, and thereafter the input video data is recorded at the first time.
Since the intermittent recording is performed at the second time interval longer than the time interval of, the recording interval is shortened for a portion where the subject moves frequently (important portion), and the recording interval is extended for the portion where the subject does not move significantly. Eliminate missing parts, and
The total recording time can be extended.

In the third aspect of the invention, the control means records the video data in the memory means at the first time interval (t1 second interval) at first. After the input of the trigger signal, the first discriminating means outputs the first discriminating signal indicating that the video data for n fields is recorded in the memory means.
The second discriminating means, after the first discriminating signal is generated,
P at the second time interval (t2 second interval, but t2> t1)
When the video data for the field is recorded in the memory means, the second determination signal indicating that is output. The control means controls so as to stop recording in the memory means based on the second determination signal. The video data recorded in the memory means is read and reproduced by the control means.

Thus, the video data for a predetermined number of fields before and after the input of the trigger signal is recorded in the memory means at a short time interval of t1 seconds, and the other video data is t2 seconds (t2> The data is recorded in the memory means at intervals of t1).

Therefore, the recording interval is shortened for the portion where the subject moves a lot (important portion), and the recording interval is extended for the portion where the subject moves less so that the important portion is not missed and the entire portion is removed. The recording time can be extended.

According to the invention described in claim 6, the input video data is continuously recorded in the first memory means at the first time interval, and at the same time, the recorded contents of the first memory means before being written are old. The data is read at a second time interval longer than the first time interval and is intermittently recorded in the second memory means. Therefore, during reproduction, (intermittent recording content of the second memory means) → (first By sequentially reading and displaying the contents (continuously recorded contents of the memory means), a scene close to the present is reproduced as a temporally fine video, and an old past scene is reproduced as a temporally rough video. Therefore, with a small number of memories, it is possible to finely record an important portion while extending the entire recording time.

According to the invention described in claim 7, the input video data is continuously recorded in the first memory means at the first time interval, and at the same time, the recorded contents of the first memory means before being written are old. The data is read at a second time interval longer than the first time interval, intermittently recorded in the second memory means, and the write operation to the first and second memory means is stopped after the trigger signal is input. At the same time, since the input video data is intermittently recorded in the third memory means at a third time interval longer than the first time interval, during reproduction, (intermittent recording content of the second memory means) → ( By sequentially reading and displaying in order of (continuous recording content of the first memory means) → (intermittent recording content of the third memory means), the scene to be shot is continuously recorded with a temporally fine image, and this continuous recording is performed. As the center, Before and after the scene is recorded at the time the rough image. Therefore, the recording interval can be set fine for the fast-moving part (important part) and wide for the slow-moving part, and the important part can be recorded finely while extending the entire recording time with a small number of memories. It is possible.

In the ninth aspect of the present invention, continuous recording is provided, which has a first memory means for continuously recording the input video data at a constant interval and a second memory means for intermittent recording at a longer time interval. By recording the video data in the first memory means for recording and simultaneously reading the old data in the first memory means and intermittently writing the old data in the second memory means for intermittent recording, the image data close to the present one can be obtained. While the old data in the first memory means can be recorded in the second memory means intermittently in a format dating back to the past, the data can be continuously recorded in the memory means of the second memory means. By reading and displaying in order of (recorded content) → (continuously recorded content of the first memory means), a scene close to the present time is reproduced as a temporally fine video, and an old scene in the past is temporally rough video. Raw to. Therefore, with a small number of memories, it is possible to finely record an important portion while extending the entire recording time.

According to the tenth aspect of the present invention, there are provided first memory means for continuously recording the input video data at a constant interval, and second and third memory means for intermittently recording a longer time interval. , The video data is recorded in the first memory means for continuous recording, at the same time the old data in the first memory means is read and intermittently written in the second memory means for intermittent recording, and the first data is input after the trigger signal is input. , Second
The writing operation to the memory means is stopped, and thereafter the input video data is intermittently recorded in the third memory means, thereby continuously recording the important image data before the trigger signal is input in the first memory means. On the other hand, the old data in the first memory means can be intermittently recorded in the second memory means in a format dating back to the past, and the video data after the input of the trigger signal can be intermittently recorded in the third memory means. , During playback,
By reading and displaying (intermittently recorded content of the second memory means) → (continuously recorded content of the first memory means) → (intermittently recorded content of the third memory means) in that order, the scene to be shot can be displayed in time. The continuous recording is performed with a detailed image, and the scenes before and after the continuous recording are recorded with a temporally rough image. Therefore, fast-moving parts (important parts)
The recording interval can be made fine, and the slow-moving portion can be made wide. With a small number of memories, it is possible to finely record the important portion while extending the entire recording time.

For example, when the input video signal is a golf swing, if the trigger signal is generated after a predetermined time delay from the time when the impact is detected, the recording interval is recorded in the first memory means before and after the fast-moving impact. Can be finely recorded, and the other front portion and the rear portion can be recorded in the second memory means and the third memory means with wide recording intervals, respectively, and the respective video data can be recorded in the second, first, and second areas.
The home check of the golf swing can be performed by reading out in the order of the third memory means.

According to the thirteenth aspect of the invention, in the first recording (trial shooting), the input video data is recorded at the first time interval, and at the same time, the number of field (or frame) memories used for recording is counted. Then, the period from the operation start to the operation end of the subject is calculated from the first time interval and the number of memories, and the second time interval at which the field (or frame) memory of the memory means can be effectively used is set in the calculation period. Therefore, the user can automatically set the optimum second time interval for intermittent recording by performing only one trial shot. Therefore, in the second recording, recording can be performed at the optimum recording time interval.

According to the sixteenth aspect of the present invention, the calculating means determines the period from the start of the operation of the subject to the end of the operation from the predetermined time interval and the number of field (or frame) memories used for recording in the memory means. calculate. The control means
Recording in which the recording time interval of the memory means is controlled based on the output of the arithmetic means, and a plurality of field (or frame) memories constituting the memory means are effectively used in the period from the start of the operation of the subject to the end of the operation. Reset the time interval. Therefore, in the second recording, recording can be performed at the optimum recording time interval.

According to the seventeenth aspect of the invention, the detecting means detects the movement of the subject. The discriminating means discriminates the operation start and the operation end of the subject based on the output of the detecting means. The control means records the video data corresponding to the operation start to the operation end of the subject in the memory means at predetermined time intervals based on the output of the determination means. The calculation means calculates a period from the start of operation of the subject to the end of the operation from the predetermined time interval and the number of field (or frame) memories used for recording in the memory means. The control means controls the recording time interval of the memory means based on the output of the computing means, and effectively uses a plurality of field (or frame) memories constituting the memory means during the period from the start of the operation of the subject to the end of the operation. Reset the recording time interval so that Therefore, when the amount of movement of the subject exceeds a predetermined value, the period from the start of the action of the subject to the end of the action is determined, and the first trial shooting is performed in this period, and the recording time interval is automatically set to the optimum value. The recording can be performed again, and the recording can be performed at the optimum recording time interval in the second recording.

[0051]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an image signal processing method and an image signal processing apparatus according to an embodiment of the present invention.

In FIG. 1, a video signal (for example, a luminance signal) of a subject photographed by a camera (not shown) is input to the input terminal 1 as an input video signal and supplied to the A / D converter 2. The A / D converter 2 converts the digital signal. The digital signal from the A / D converter 2 is input to the memory unit 3. The memory unit 3 is a field memory having a memory capacity (for example, 2 Mbits) capable of recording a digital signal corresponding to a video signal for one field.
The number (m is an integer) is provided, and the digital signal is recorded by the write signal from the memory control circuit 4, and the digital signal is reproduced by the read signal. The digital signal reproduced from the memory unit 3 is input to the D / A converter 5, converted into an analog signal, and output from the output terminal 14.

The first memory counter circuit 6 is used, for example, at the moment of impact of golf (or a scene to be seen later).
When a trigger signal indicating that is input is input, the number of field memories used for recording after inputting the trigger signal is counted. The counter value of the first memory counter circuit 6 is
It is output to the first discrimination circuit 7. When the counter value reaches a preset value n (n <m, n is an integer), the first discriminating circuit 7 outputs the discriminating signal A to the recording time interval control circuit 8
And to the second memory counter circuit 10. When the discrimination signal A is input, the recording time interval control circuit 8 outputs a recording time interval control signal to the recording time interval setting circuit 9. The recording time interval setting circuit 9 is controlled by the recording time interval control signal, sets the recording time interval, and outputs it to the memory control circuit 4.

When the discrimination signal A is input, the second memory counter circuit 10 counts the number of field memories used for recording after the discrimination signal A is input. The counter value of the second memory counter circuit 10 is output to the second discriminating circuit 11. The second discriminating circuit 11 uses the preset value p (p <p of the counter value of the second memory counter circuit 10).
When m and p are integers, the discrimination signal B is sent to the recording control circuit 1
Output to 2. When the discriminating signal B is input, the recording control circuit 12 outputs a recording stop signal to the memory control circuit 4. The memory control circuit 4 constitutes a control means together with the recording control circuit 12.

The memory control circuit 4 outputs a write signal based on the output from the recording time interval setting circuit 9,
When the recording stop signal is input from the recording control circuit 12, the write signal is stopped.

Next, the operation of the image signal processing method and apparatus thus constructed will be described with reference to FIG.

FIG. 2 (a) shows an input video signal (numbered in input order in units of 1 field).
(b) shows the recording process in each field memory of the memory unit 3, FIG. 2 (c) shows the recorded contents in each field memory after the recording is completed, and FIG. 2 (d) shows the field shown in FIG. 2 (c). The numbers are sorted in numerical order.

In FIG. 1, it is assumed that a video signal of an object photographed by a camera (not shown) is input for 20 fields during recording as shown in FIG. 2 (a). The input video signal is converted into a digital signal by the A / D converter 2 and input to the memory unit 3. The memory unit 3 has m field memories (here, m = 12) having a memory capacity (for example, 2 Mbits) capable of recording a digital signal corresponding to a video signal for one field, and the memory control circuit 4 The digital signal input by the write signal from is recorded in each field memory of the memory unit 3. At this time, first, t1 seconds (for example, t1
Is continuously recorded at intervals corresponding to one field, that is, 1/60 seconds). Next, as shown in FIG. 2A, it is assumed that a trigger signal is input immediately after the video signal of the ninth field is input (for example, to notify the moment of impact of golf). This trigger signal is input to the first memory counter circuit 6. The first memory counter circuit 6 counts the number of field memories used for recording after the trigger signal is input, and outputs the counter value to the first discriminating circuit 7. The first discriminating circuit 7 outputs a discriminating signal A to the recording time interval control circuit 8 and the second memory counter circuit 10 when the counter value reaches a preset value n (for example, n = 5). When the discrimination signal A is input, the recording time interval control circuit 8 generates a recording time interval control signal and supplies it to the recording time interval setting circuit 9. As a result, the recording time interval setting circuit 9 changes the recording time interval from t1 seconds (1/60 seconds) until then to t2 seconds (t2> t1).
, For example, 3/60 seconds) and give it to the memory control circuit 4. As a result, the memory control circuit 4 has t2 seconds (3/6
A write signal for recording in the field memory of the memory section 3 is generated at intervals of 0 second. Further, at the time of recording, after writing in the mth field memory, a write signal for overwriting (re-recording) some of the already recorded field memories is generated and given to the memory unit 3.

On the other hand, when the discrimination signal A is inputted, the second memory counter circuit 10 counts the number of field memories used for recording after the discrimination signal A is inputted, and the count value is sent to the second discrimination circuit 11. Output. The second discriminating circuit 11 determines that this counter value is a preset value p (here, p
= 2), a recording stop signal is output to the memory control circuit 4. When the recording stop signal is input, the memory control circuit 4 stops the write signal.

The above operation will be briefly described again with reference to FIG. First, the input signal is sequentially recorded in the field memory at intervals of t1 seconds (1/60 seconds). That is, the # 1 field memory has information about the first video signal, the # 2 field memory has information about the second video signal, and the # 3 field memory has information about the third video signal. It will be recorded as. Then, after the information of the ninth video signal is recorded in the field memory of # 9, the trigger signal is inputted, but after the trigger signal is inputted, the recording is continued at the interval of t1 seconds (1/60 seconds). In this way, when the information of the 12th video signal is recorded in the # 12 field memory, the information of the next 13th video signal is overwritten, for example, in the # 2 field memory among the already recorded field memories. And re-record. Similarly, the information of the 14th video signal is re-recorded in the field memory # 3. by the way,
The information of the 10th to 14th video signals was recorded in the field memory after the trigger signal was input, but the number of field memories used for this was 5, and the set value n (n = Since it has become the same as 5), the first discrimination circuit 7 generates the discrimination signal A. And then t
Record at intervals of 2 seconds (3/60 seconds). That is, the seventeenth
The information of the 20th video signal is overwritten in the field memory of # 5 and the information of the 20th video signal is overwritten in the field memory of # 6 and re-recorded. Here, the number of field memories used for recording after the discrimination signal A is input to the second memory counter circuit 10 is 2 (# 5, # 6), and the set value p (p = p = p Since it has become the same as 2), the second discriminating circuit 11 generates a recording stop signal and stops recording. Therefore, the information of the 20th video signal is #
When the data is recorded in the field memory No. 6, the recording ends. Therefore, after the recording is completed, the relationship between each field memory and the recorded contents is as shown in FIG. 2 (c). If this is rearranged in the order of the numbers of the input video signals, it is shown in FIG.
It becomes like (d). That is, n3 (n3 = 3 in this case) video signal (7th to 9th) information before trigger signal input and n (n = 5) video signal (10th video) after trigger signal input. Information from the 14th to 14th) is t
Information is recorded at 1 second (1/60 second) intervals, and the other video signal information (1st, 4th, 17th, 20th) information is recorded at t2 second (3/60 second) intervals. It will be.

During reproduction, the sequence shown in FIG. 2 (d) (# 1, # 4, #
7, # 8, # 9, # 10, # 11, # 12, # 2, #
The digital signal reproduced from the memory unit 3 in the order of # 3, # 5 and # 6 is converted into an analog video signal by the D / A converter 5 and output to the output terminal 14.

As described above, in this embodiment, before and after the input timing of the trigger signal, that is, before and after the desired scene, can be recorded at short time intervals, and other scenes can be intermittently recorded. Moreover, the user does not need to take a trial shot.

In this embodiment, the input video signal is explained as the luminance signal Y, but the present invention is not limited to this, and it may be a color difference signal of (RY) or (BY). Good. Although the memory is a field memory, it may be a frame memory.

FIG. 3 is a block diagram showing a main part of an image signal processing method and an image signal processing apparatus according to another embodiment of the present invention.

In FIG. 3, the memory structure is roughly composed of three blocks. A memory means A (12 fields) for recording a continuous portion before and after the trigger signal, a memory means B11 (5 fields) for intermittent recording before the continuous portion, and an intermittent recording after the continuous portion. This is the memory means B12 (5 fields) for performing. Intermittent parts are 4 times intermittent.

The input video data is supplied from the input terminal 21 to the input end a of the memory selection switch SW, and selectively supplied to the memory means A (and the memory means B11) or the memory means B12 via this switch SW. It is like this. The output terminals b and c of the memory selection switch SW are respectively connected to the input terminals of the memory means A and the memory means B12, and the selection of the memory means A (and the memory means B11) or the memory means B12 is performed by the output of the switch SW. This is performed by switching the ends b and c by a memory select signal from the control signal generation circuit 22. The memory select signal output from the control signal generation circuit 22 is a signal indicating whether or not the trigger signal input to the control signal generation circuit 22 is supplied (before or after input of the trigger signal). Before the trigger signal is input, the switch SW is connected to the output end b by the select signal, and the input video data is switched to the memory means A. After the trigger signal is input, the switch SW is connected to the output end c. Then, the input video data is switched to the memory means B12.

The memory means A includes twelve field memories A1, A2, ..., A12 and each of these memories A1 ...
Output switches SWA1 and S connected in series with each A12
WA2, ..., SWA12 and memories A1 to A1
The input terminals of 2 are connected in parallel and are connected to one output terminal b of the memory selection switch SW, and the output terminals of the output switches SWA1 to SWA12 are connected in parallel and connected to the output terminal 23. There is. The memory means B11 comprises five field memories B1, B2, ..., B5 and output switches SWB1, SWB2, ..., SWB12 connected in series to each of these memories B1 to B12.
The input terminals of the memories B1 to B5 are connected in parallel to the output terminal of the memory means A, and the output switch S
The output terminals of WB1 to SWB5 are connected in parallel and are connected to the output terminal 23. The memory means B12 is composed of five field memories B6, B7, ..., B10 and output switches SWB6, SWB7, ..., SWB10 connected in series to each of these memories B6 to B10. .. to B10 are connected in parallel to the other output terminal c of the memory selection switch SW, and the output terminals of the output switches SWB6 to SWB10 are connected in parallel to the output terminal 23. Has been done. In the above memories A1 to A12, B1 to B5 and B6 to B10,
A FIFO memory capable of writing and reading independently is suitable.

From the control signal generation circuit 22, in addition to the memory select signal to the memory select switch SW, the memories A1 to A12, B1 to B5 and B6 to each of the memory means A, the memory means B11 and the memory means B12. Write enable signals (A1 to A12-WE, B) for writing and reading data to and from B10.
1 to B10-WE and read enable signal (A1 to A)
12-RE, B1 to B10-RE) are output. The write enable signal WE and the read enable signal RE are active at the high level “H”.

Each memory A1 to A12, B1 to B5 and B6
To output switches SWA1 to SWA1 respectively connected to B10
2, SWB1 to SWB5 and SWB6 to SWB10 are read enable signals (A1 to A12-RE, B1 to B10-RE)
When the read enable signal RE is "H", it is turned on and the memory data is output.

Next, the operation of FIG. 3 will be described. Input terminal 2
When the input video data is supplied to 1 and the recording of the video data is started, the memory selection switch SW is first connected to the memory means A side and sequentially recorded in each of the memories A1 to A12 of the memory means A.

FIG. 4 shows the state of the memory when 10 fields are recorded. At this time, the memory A of the memory means A
Data D1 to D10 are recorded in 1 to A10, respectively, and the memories A11 and A12 of the memory means A and the memory means B11 and B are recorded.
Since nothing is recorded in each of the 12 memories B1 to B10, nothing is stored in the memory.

FIG. 5 shows each of the memories A1 to A12 at this time.
7 shows a timing chart of the write enable signal WE and the read enable signal RE supplied to B1 to B5 and B6 to B10. The write enable signal WE supplied to the memories A1 to A10 sequentially becomes the high level "H", and the data D1 to D10 is stored in the memories A1 to A10, respectively.
10 is written sequentially. Read enable signal RE
Has not been read, and remains at the low level "L".

When recording is further continued and recording is performed up to the memory A12 (that is, up to the data D12), recording is performed again from the memory A1. FIG. 6 shows the state of the memory at this time. 13th data D13 in memory A1
Is already recorded in memory A1 when writing
The second data D1 is overwritten. Similarly, the 14th and 15th data D is stored in the memories A2 and A3.
When 14 and D15 are written, they are overwritten on the second and third data D2 and D3 already recorded in the memories A2 and A3. When the data D16 is written in the memory A4, the data D4 already written in A4 is simultaneously read out and written in the memory B1 of the memory means B11. At this time, the read enable signal RE becomes high level "H". Then, the read enable signal RE
As a result, the switch SWA4 connected to the output of the memory A4 is turned on, and this data D4 is input to the memory B1 of the memory means B11. At the same time, the write enable signal WE of the memory B1 becomes high level "H". Similarly, when the data D20 is written in the memory A8, the data D8 already written in the A8 is read at the same time,
It is written in the memory B2 of the memory means B11. After that, the same data is written in the memory A and the old data is read at the same time.
It is carried out every other number and is recorded in the memory means B11 (in this embodiment, the intermittent recording is four times, so it is every four items, but this may be arbitrary). The timing chart at the time of writing and reading is shown.

When the recording is continued in this way and the memory B11 is recorded up to the memory B5, like the memory A, the memory B1 is returned to and overwritten.

The 42nd data D is stored in the memory A6.
It is assumed that the trigger signal is input to the control signal generation circuit 22 when 42 is written.

FIG. 8 shows the contents of the memory at this moment.
At this time, the newest data of the memory means B11 (old data last written from the memory means A) is the memory B
2 is D28, and the oldest data of the memory means A is D31 of the memory A7. At the time of reproduction, (memory means B11) →
When data is reproduced in the order of (memory means A), the data is D
28 → D31 and discontinuous. For this reason, the control signal generation circuit 22 is next operated by the memory B3 of the memory means B11.
Continue recording until memory A8 is written to
8 is recorded, and at the same time, the old data D32 is written to the memory B3, and then the writing to the memory means A and B11 is stopped.

FIG. 9 shows a memory means A and a memory means B11.
The contents of the memory at the moment when writing to the memory is stopped.

As shown in FIGS. 9 and 8, when a trigger signal is input to the control signal generation circuit 22, the writing to the memory means A is not stopped immediately, but immediately after the memory means B11 writes data. Just stop at.
By doing so, the last data of the memory means B11 and the first data of the memory means A are temporally continuous.

At the same time when the writing to the memory means A and the memory means B11 is stopped, the control signal generating circuit 22
The memory selection switch SW of FIG. 3 is switched to the memory means B12 side to perform intermittent recording.

FIG. 10 shows a timing chart at this time. The memories B6, B7, ..., B1 are sent to the memory means B12.
For example, 4 times intermittent recording is performed in the order of 0.

Then, recording is continued in the memory means B12,
After writing to the memory B10, the recording is finished.
FIG. 11 shows the memory contents at the end of writing to the memory means B12.

At the time of reproduction, it is carried out in the order of (memory means B11) → (memory means A) → (memory means B12). With respect to the memory means B11 and the memory means A, reproduction is started from the next memories B4 and A9 which have finished writing. Therefore, the data D16, D20, D24, D28 of the memory means B11,
D32, data D33 of memory means A, D34, ..., D43,
D44, data D48, D52, D56, D6 of the memory means B12
Playback is performed in the order of 0 and D64. The data in the memory means A is continuously reproduced, and the data in the memory means B11 and B12 is 4
Playback is performed twice as long (the same data is read four times in succession). However, as can be seen from the written data number, the last data D32 of the memory means B11 is reproduced 1 times, and the last data D44 of the memory means A is reproduced 4 times.

FIG. 12 shows a timing chart during reproduction. Here, the memories B4, B5 of the memory means B11,
B1, B2, B3, memories A9, A10 of the memory means A,
A11, A12, A1, A2, A3, A4, A5, A6, A
7, A8, memories B6, B7, B8 of the memory means B12,
The timing of the read enable signal RE sequentially supplied to the B9 and B10 memories is shown.

FIG. 13 shows the recording time according to the embodiment of FIG. Five fields for the memory means B11 correspond to a recording time of ⅓ seconds for intermittent quadruple recording, and 12 fields for the memory means A for continuous recording correspond to a recording time of ⅕ seconds. The recording of 5 fields by B12 is intermittent quadruple recording, which corresponds to a recording time of 1/3 second.

In the case of applying the embodiment of FIG. 3 to the golf swing check, after detecting the impact time by the sound sensor, the trigger signal is generated by delaying the impact detection for a predetermined time, and the trigger signal is controlled by the control. If it is supplied to the signal generating circuit 22, the scene until the trigger signal is input is intermittently recorded in the memory means B11 and continuously recorded in the memory means A, and the scene after the trigger signal is input is the memory means B12. Will be recorded intermittently. Therefore, it is possible to shorten the recording interval near the impact and extend the entire recording time while using the same number of memories as in the conventional example. The intermittent interval and the number of memories of each memory means can be arbitrarily selected other than the above-mentioned embodiment. Since the memory means B12 has exactly the same structure as the memory means A, it is possible to control the microcomputer so that a part of the memory means A is used as the memory means B12.

As described above, when the form shooting is applied to a golf swing or the like, it is necessary for the user not to miss a part before and after a part where a subject moves a lot (a scene to be shot) and to take a trial shot in advance. Does not happen.

Further, in the above description, the golf swing is taken as an example, but the memory means B12 after the trigger signal is not always necessary depending on the application. For example, in addition to a sports swing, the application as a buffer recorder of a monitoring system or the like can be considered, paying attention to the fact that the recording time interval can be switched back in the past from the trigger time and in the middle. In this case, the sound sensor is replaced with a system abnormality detection sensor, and the memory means A is continuously operated while the memory means B11 is intermittently operated. If any abnormality is detected, recording is stopped and playback is performed. In this case, it is possible to make the recording interval fine near the time when there is an abnormality, and it is possible to record the images earlier than that intermittently for a considerable amount of time, so that the abnormality can be easily confirmed.

In the above embodiment, the input video signal is described as the luminance signal Y, but the present invention is not limited to this, and (RY) and (BY) color difference signals may be used. . Further, although the field memory is used, a frame memory can also be used, and if the image quality is prioritized, the frame memory may be used, and if the cost is prioritized, the field memory may be used.

FIG. 14 is a block diagram showing an image signal processing method and an image signal processing apparatus according to another embodiment of the present invention.

In FIG. 14, a video signal (for example, a luminance signal) of a subject photographed by a camera (not shown) is input to the input terminal 51 as an input video signal, and the A / D converter 5
2 is supplied. The A / D converter 52 converts the digital signal. The digital signal from the A / D converter 52 is input to the memory unit 53. The memory section 53 has m field memories (m is an integer) having a memory capacity (for example, 2 Mbits) capable of recording a digital signal corresponding to a video signal for one field, and writing from the memory control circuit 54 is performed. The digital signal is recorded by the signal, and the digital signal is reproduced by the read signal. The digital signal reproduced from the memory unit 53 is D /
It is input to the A converter 55 and converted into an analog signal,
It is output from the output terminal 61.

The memory control circuit 54 includes a trigger signal from the trigger signal input terminal 60 and a recording time interval setting circuit 59.
The recording time interval setting signal from is input. The trigger signal is, for example, the period from the start of movement of the subject to the end of movement.
The recording time interval setting circuit 59 sets the recording time interval to, for example, a predetermined t1 second and outputs this value to the memory control circuit 54 and the arithmetic circuit 57. The trigger signal is at the "H" level. Then, the memory control circuit 54 sends the write signal at the time interval of the set time (t1 second) sent from the recording time interval setting circuit 58 to the memory section 53.
Output to. When a trigger signal for notifying the period from the operation start to the operation end of the subject is input, the memory counter circuit 56 counts the number of field memories used for recording during the period in which the trigger signal is input. That is, the memory counter circuit 56 determines the number n (n is an integer: n <m) of the field memories used for recording the digital signal from the A / D converter 52 during the period when the trigger signal is at “H” level. Output to the arithmetic circuit 57.

On the other hand, the set time (t1 second) from the recording time interval setting circuit 59 is also input to the arithmetic circuit 57.
The arithmetic circuit 57 obtains the time T during which the trigger signal is at the "H" level from the two input values (the field memory number n used for recording and the set time t1) and outputs it to the recording time interval control circuit 58. To do. The time T is the time from the start of the motion of the subject to the end of the motion, and T = (n-1)
It is calculated at t1. When this time T is input, the recording time interval control circuit 58, for example, the recording time interval setting circuit 59.
A control signal for setting the setting time of t2 seconds (t2 <t1) is output. The recording time interval setting circuit 59 sets the setting time of the recording time interval to t2 seconds based on the control signal from the recording time interval control circuit 58, and the memory control circuit 54
Output to. Here, the newly set recording time interval t
2 is, for example, t2 = T so that the maximum number m of all field memories of the memory unit 53 can be utilized in the period T.
/ (M-1). Then, the memory control circuit 54
When the trigger signal input for the second time becomes "H" level, the write signal is sent to the memory section 53 at a time interval of t2 seconds in the period T of "H" level of the trigger signal.
Output to. As a result, in the second recording, the video data from the start of the motion of the subject to the end of the motion is recorded at the time interval t.
2 is recorded over all m field memories. That is, using the m field memories to the maximum,
It is possible to record all the scenes from the start of the motion of the subject to the end of the motion.

Next, the operation of the image signal processing method and apparatus having the above arrangement will be described with reference to FIG. FIG. 15 is a diagram for explaining the operation after the trigger signal is input according to the embodiment of FIG.

In FIG. 15, (a) is a trigger signal, T
Indicates the time when the trigger signal was at the “H” level, that is, the time corresponding to the start of the operation of the subject and the end of the operation. (b) is for the first intermittent recording (that is, for trial shooting)
Recording time interval of the trigger signal, during the "H" level period T of the trigger signal, recording is performed n times at the recording time interval t1, that is, intermittent recording is performed over n field memories out of all m field memories. Is shown. As a result, since the time interval t1 for trial shooting and the number of field memories n are known, the trigger signal period T can be calculated in the arithmetic circuit 57 by using the above-mentioned equation T = (n-1) t1. Then, based on this time T, the recording time interval control circuit 58 calculates the recording time interval t2 at the time of performing the second intermittent recording by using the above-mentioned formula t2 = T / (m-1). (c) shows the recording time interval at the time of the second intermittent recording, which is the "H" level period T of the trigger signal.
2 shows that recording is performed m times at the recording time interval t2, that is, intermittent recording is performed using all m field memories. In the second recording, the m field memories can be used to the maximum extent to record all the scenes from the movement start to the movement end of the subject.

As described above, in the present embodiment, the scene from the start of the motion of the subject to the end of the motion is first recorded in the memory unit 5 having m field memories at the recording time interval of t 1 seconds.
3, the period T from the start of movement of the subject to the end of movement is determined by the number n of field memories used at this time and the recording time interval t1 second. Further, by the obtained time T and the total number m of field memories, the memory unit 5
Obtain the recording time interval t2 seconds that can maximize 3 and automatically reset the time interval. In other words, only 1 user
The optimum recording time interval for intermittent recording can be set only by taking a number of trial shots. Then, if the same scene is recorded again by inputting a trigger signal corresponding to the period T from the start of the operation of the subject to the end of the operation, the m field memories are used to the maximum, and the operation of the subject from the start of the operation is started. You can record all the scenes until the end.

In the embodiment of FIG. 14, the second recording is recorded in the memory section 53 at a constant time interval t2. However, for example, the first and last portions are recorded at the time interval t2.
The recording time interval may be partially changed such that the recording time interval is made longer and shorter than t2.

FIG. 16 is a block diagram showing an image signal processing method and an image signal processing apparatus according to another embodiment of the present invention.
The same components as those in FIG. 14 are designated by the same reference numerals and the description thereof will be omitted.

In the embodiment shown in FIG. 16, the digital video signal from the A / D converter 52 in the circuit configuration of FIG. 14 is guided to the motion detection circuit 62 to detect the motion amount, and the detection output thereof is discriminated circuit 63. In this configuration, the magnitude of the motion amount of the video signal is discriminated and the discrimination output is supplied to the memory control circuit 54 instead of the trigger signal of FIG.

In the above configuration, the motion detection circuit 62
Is supplied with a digital signal from the A / D converter 52, detects a moving portion, and outputs a pulse to the discrimination circuit 63. The discriminating circuit 63 counts the number of the pulses, for example, on a field unit basis, outputs an "H" level discrimination signal when the count value exceeds a preset value, and outputs an "L" level discrimination signal when the count value does not exceed the preset value. It is designed to output a signal. In general, since there is almost no movement immediately before the movement of the subject and immediately after the movement of the subject, the discrimination circuit 63
Is at the "L" level, and the output of the discrimination circuit 63 is at the "H" level from the start of the operation to the end of the operation. That is, the output of the discrimination circuit 63 may be considered as a signal corresponding to the trigger signal of FIG. The following operation is the same as that of the embodiment of FIG. 14, and it is apparent that the same operation and effect as the embodiment of FIG. 14 can be obtained in this embodiment as well.

[0100]

As described above, according to the present invention, it is possible to avoid missing a part before and after a portion where a subject moves frequently (a scene to be taken), or to eliminate the trial shooting of the user or to perform one trial. Just by shooting, you can set the optimum recording time interval for intermittent recording and record important parts without omission. In addition, the total recording time can be extended with a small number of memories. The cost of the image recording system can be reduced by reducing the number of memories.

[Brief description of drawings]

FIG. 1 is a block diagram showing an image signal processing method and an image signal processing apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining the operation of the embodiment of FIG.

FIG. 3 is a block diagram showing a main part of an image signal processing method and an image signal processing device according to another embodiment of the present invention.

FIG. 4 is a diagram showing a memory write operation according to the embodiment of FIG.

5 is a timing chart showing the operation of FIG.

FIG. 6 is a diagram showing a memory write operation according to the embodiment of FIG.

FIG. 7 is a timing chart showing the operation of FIG. 6 and subsequent steps.

8 is a diagram showing a memory write state when a trigger signal is input according to the embodiment of FIG.

FIG. 9 is a diagram showing a memory write operation when a trigger signal is input according to the embodiment of FIG.

10 is a timing chart showing an operation after inputting a trigger signal according to the embodiment of FIG.

FIG. 11 is a diagram showing the memory contents at the end of writing according to the embodiment of FIG.

FIG. 12 is a timing chart showing an operation during reproduction according to the embodiment of FIG.

FIG. 13 is a diagram showing a recording time according to the embodiment of FIG.

FIG. 14 is a block diagram showing a main part of an image signal processing method and an image signal processing device according to another embodiment of the present invention.

FIG. 15 is a diagram for explaining the operation after the trigger signal is input according to the embodiment of FIG.

FIG. 16 is a block diagram showing a main part of an image signal processing method and an image signal processing device according to another embodiment of the present invention.

FIG. 17 is a block diagram of a conventional image signal processing device.

FIG. 18 is a configuration diagram of a memory unit of a conventional image signal processing device.

FIG. 19 is a diagram showing an intermittent recording state in a memory in a conventional image signal processing device.

[Explanation of symbols]

3, 53 ... Memory unit (memory means) 4, 54 ... Memory control circuit (control means) 7 ... First determination circuit (first determination means) 8, 58 ... Recording time interval control circuit (recording time interval control means) ) 4 and 12 ... Control means 11 ... Second discrimination circuit (second discrimination means) 12 ... Recording control circuit (control means) 13, 60 ... Trigger signal input terminal 21 ... Video data input terminal 22 ... Control signal generation circuit (Control means) 23 ... Video data output terminal 56 ... Memory counter circuit (memory counter means) 57 ... Arithmetic circuit (arithmetic means) A ... Memory means (first memory means) B11 ... Memory means (second memory means) B12 ... Means of memory (third memory means) A1 to A12 ... Memories B1 to B5 ... Memories B6 to B10 ... Memories

Claims (19)

[Claims] 1. An image signal processing method for writing video data supplied as an input to a memory means and reading the written video data so that the video data can be displayed. The input video data is stored until a trigger signal is input. Continuously records in the memory means in units of fields (or frames), and after inputting the trigger signal, records input video data for n fields (or frames) (n is an integer) at the first time interval. Then, thereafter, the input video data is recorded at a second time interval longer than the first time interval by p fields (or frames) (p is an integer). 2. When the input video data for p fields (or frames) (p is an integer) is recorded at a second time interval in the memory means, when the memory capacity of the memory means is insufficient, 2. The image signal processing method according to claim 1, wherein the recorded portion is overwritten and re-recorded. 3. An image signal processing device for writing video data supplied as an input to a memory means, and reading the written video data for display, wherein the input video data is recorded in field (or frame) units. And a first discriminating means for outputting a first discriminating signal indicating that image data for n fields (or frames) (n is an integer) has been recorded in the memory means after the input of the trigger signal. A second discriminating means for outputting a second discriminating signal indicating that the video data for p fields (or frames) (p is an integer) is recorded in the memory means after the generation of the first discriminating signal. A control means for controlling recording and reproduction to and from the memory means, the control means controlling to stop recording in the memory means based on the second determination signal; An image signal processing device, comprising: a recording time interval control means for controlling a recording time interval of the control means based on the first determination signal. 4. The recording time interval control means controls the recording time interval of the control means so as to be usually a first time interval, and when the first determination signal is input, the recording time interval is controlled. Is controlled so as to become a second time interval that is longer than the first time interval.
The image signal processing device described. 5. The control means, when recording in the memory means in a state where the recording time interval is the second time interval, when the memory capacity of the memory means is insufficient, the control means overwrites the already recorded portion. The image signal processing apparatus according to claim 3, wherein the image signal processing apparatus is controlled so as to write and re-record. 6. An image signal processing method for writing video data supplied as an input to a memory means, and reading the written video data for display, wherein the input video data is stored in a field of the first memory means. At the same time as continuous recording in units of (or frames) and at a first time interval, video data, which is the recorded content of the first memory means before writing, is recorded at a second time longer than the first time interval.
The image signal processing method is characterized by reading out at time intervals of and recording in the second memory means in field (or frame) units. 7. An image signal processing method for writing video data supplied as an input to a memory means, and reading the written video data so that the video data can be displayed. The input video data is stored in a field of the first memory means. At the same time as continuous recording in units of (or frames) and at a first time interval, video data, which is the recorded content of the first memory means before writing, is recorded at a second time longer than the first time interval.
Read at a time interval of, record in the second memory means in units of fields (or frames), and stop the write operation to the first and second memory means after inputting the trigger signal, and at the same time, input video data An image signal processing method, characterized in that recording is performed on a field (or frame) basis in the third memory means at a third time interval longer than the first time interval. 8. The image signal processing method according to claim 6, wherein the second time interval and the third time interval are the same time interval. 9. An image signal processing device capable of writing video data supplied as an input to a memory means and reading the written video data to display the input video data in field (or frame) units. First memory means for continuously recording at a first time interval, and video data in field (or frame) units read from the first memory means for a second time longer than the first time interval. At the same time that the input video data is written into the second memory means for recording at intervals and the first memory means at the first time interval, the video data which is the recorded contents of the first memory means before writing is written into the first memory means. An image signal processing device, comprising: a control unit that controls reading so as to be performed at time intervals of 2 and writing to the second memory unit. 10. An image signal processing device capable of writing video data supplied as an input to a memory means and reading the written video data to display the input video data in field (or frame) units. First memory means for continuously recording at a first time interval, and image data in field (or frame) units read from the first memory means are recorded in a second memory longer than the first time interval. Second memory means for recording at time intervals, and write operation to the first and second memory means is stopped after the input of the trigger signal, and at the same time, the input video data is recorded in the first (1) field (or frame) unit. Third memory means for recording at a third time interval longer than the time interval, and input video data is written to the first memory means at the first time interval. At the same time, the video data, which is the recorded content of the first memory means before being written, is controlled to be read at the second time interval and written to the second memory means, while the first signal is input after the trigger signal is input. Image signal processing, characterized by further comprising: control means for stopping the writing operation to the second memory means and at the same time controlling the input video data to be written in the third memory means at a third time interval. apparatus. 11. The image signal processing apparatus according to claim 9, wherein the second time interval and the third time interval are the same time interval. 12. The control means writes the input video data to the first memory means at the first time interval, and at the same time, writes the video data which is the recorded content of the first memory means before the writing. First means for controlling to read out and write to the second memory means at a time interval of 2; and to stop the write operation to the first and second memory means after the input of the trigger signal and at the same time to the third means. 11. The image signal processing apparatus according to claim 10, further comprising: second means for selecting the memory means and controlling the input video data to be written at the third time interval. 13. An image signal processing method for writing video data supplied as an input to a memory means and reading the written video data so that the video data can be displayed. Image data is stored in the memory means in units of fields (or frames) for n fields (or frames) (n is an integer)
While recording at time intervals of, the number of field (or frame) memories of the memory means used for recording is counted, and from the start of operation of the subject to the end of operation based on the number of memories and the first time interval. Is calculated, and the recording time interval in the field (or frame) memory that constitutes the memory means is reset to the second time interval based on the calculated time period. 14. In the second time interval, the input image data is read by using all the number of field (or frame) memories constituting the memory means in the period from the operation start to the operation end of the subject. 14. The image signal processing method according to claim 13, wherein the recording time interval for recording is set. 15. The period from the start of the movement of the subject to the end of the movement is determined by detecting the amount of movement of the subject in field (or frame) units and determining the length of the period in which the amount of movement exceeds a predetermined value. 2. The method according to claim 1, wherein
3. The image signal processing method described in 3. 16. An image signal processing device capable of writing video data supplied as an input to a memory means and reading out the written video data to display the video data corresponding to a period from the start of operation of a subject to the end of the operation. Memory means for inputting data and recording the video data in field (or frame) units at predetermined time intervals, and for controlling recording and reproduction with respect to this memory means,
At the time of recording, control means for outputting a writing signal to the memory means at a predetermined time interval in a period from the operation start of the subject to the operation end, and the memory after the input of the trigger signal synchronized with the operation start of the subject Memory counter means for counting the number of field (or frame) memories used for recording of the means, number of field (or frame) memories used for recording from the memory counter means, and the predetermined time interval for the memory means From the operation means for calculating the period from the start of the operation of the subject to the end of the operation, and the field (or frame) memory constituting the memory means is effectively used during the period calculated by the operation means. A recording time interval control means for performing control to reset the recording time interval of the control means. Image signal processing apparatus characterized by. 17. An image signal processing device for writing video data supplied as an input to a memory means and reading the written video data for display, the detection means detecting the amount of movement of a subject. A determination unit that determines whether the detection output of the detection unit exceeds a certain value and determines from the operation start to the operation end of the subject, and the video data corresponding to the operation start to the operation end of the subject are input. A memory means for recording the video data in field (or frame) units at a predetermined time interval, and a means for controlling recording / reproduction with respect to the memory means,
At the time of recording, control means for outputting a write signal to the memory means at a predetermined time interval during the period judged by the judging means, and used for recording in the memory means after the judgment signal is inputted from the judging means. Memory counter means for counting the number of stored field (or frame) memories, and the field (or frame) of this memory counter means
Calculating means for calculating a period from the operation start to the operation end of the subject from the number of memories and the predetermined recording time interval for the memory means, and the memory means in the period calculated by the calculating means. An image signal processing apparatus, comprising: recording time interval control means for performing control to reset the recording time interval of the control means so as to effectively use the field (or frame) memory that constitutes it. 18. The recording time interval control means maximizes all the field (or frame) memories constituting the memory means in the period from the operation start to the operation end of the subject calculated by the calculation means. 18. The image signal processing device according to claim 16 or 17, wherein control is performed to reset the recording time interval of the control means so as to be used. 19. The detecting means comprises means for detecting a moving portion of input image data and outputting a pulse, and the judging means determines the number of pulses from the detecting means in field (or frame) units. 18. The image signal processing device according to claim 17, wherein the image signal processing device comprises means for counting and outputting a discrimination signal when the count value exceeds a predetermined value.