JP3096593B2 - Method of utilizing field memory in 2D / 3D video converter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for utilizing a field memory in a 2D / 3D video converter for converting a two-dimensional video into a three-dimensional video.

[0002]

2. Description of the Related Art Most of the three-dimensional video software used in a three-dimensional video display system, which has recently become a hot topic, is 3D video software.
It has been specially created for 3D video display systems. Generally, such three-dimensional video software is obtained by capturing and recording a left-eye video and a right-eye video using two cameras. The left and right images recorded in the three-dimensional image software are superimposed and displayed almost simultaneously on the display device. Then, the left-eye image and the right-eye image, which are superimposed and displayed, are separately incident on the left and right eyes of the observer, whereby the observer recognizes the three-dimensional image.

[0003] At present, there are many two-dimensional video softwares. Therefore, if a three-dimensional video can be generated from such two-dimensional video software, the trouble of recreating three-dimensional video software having the same contents as existing two-dimensional video software from the beginning can be omitted.

[0004] Under such circumstances, the present applicant has already developed an apparatus for converting a two-dimensional image into a three-dimensional image (hereinafter referred to as a 2D / 3D image conversion apparatus). This 2D / 3
The principle of converting a two-dimensional image into a three-dimensional image by the D image converter will be described. In other words, in the case of a two-dimensional video in which an object moving from left to right is shown, the original two-dimensional video is used as the left-eye video, and the video several fields before this left-eye video is used as the right-eye video. . This way,
Since a parallax is generated between the left-eye image and the right-eye image, by displaying these images almost simultaneously on the screen, the moving object is raised forward with respect to the background.

An image several fields before the left-eye image can be obtained by storing the original two-dimensional image in a plurality of field memories and reading the image with a delay of a predetermined number of fields. The above conversion method is referred to as a field delay method.

[0006]

The 2D / 3D video converter developed by the present applicant has a display mode of 2D / 3D.
There are a two-dimensional image display mode and a three-dimensional image display mode. In the two-dimensional video display mode, an input two-dimensional video signal is sent to a display device without being converted to a three-dimensional video signal. In the 3D image display mode,
The input two-dimensional video signal is converted into a three-dimensional video signal and then sent to a display device.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a 2D / 3D video converter which can effectively use a field memory which is not used when a 2D video display mode is set. It is to provide a memory utilization method.

Another object of the present invention is to provide a 2D / 3D video converter, which can effectively use a field memory even when a three-dimensional video display mode is set. It is to provide a memory utilization method.

[0009]

According to the first aspect of the present invention, there is provided:
A method of utilizing a field memory in a D / 3D video conversion device is to generate a main video signal from a two-dimensional video signal and a sub video signal delayed with respect to the main video signal using a field memory. A method of utilizing a field memory in a 2D / 3D image conversion device for converting a two-dimensional image into a three-dimensional image, wherein a two-dimensional image in which an input two-dimensional image signal is output as it is as a video display mode of the 2D / 3D image converter There are a display mode and a three-dimensional image display mode for converting an input two-dimensional image signal into a three-dimensional image and outputting the three-dimensional image signal. When the two-dimensional image display mode is set, based on an image retraction command, Saving the input two-dimensional video signal to the field memory,
The saved two-dimensional video signal is output as a still image based on a saved video output command.

A low-resolution mode in which a two-dimensional video signal for one field is saved to the field memory based on a video save command as a save mode, and a two-dimensional video signal for two fields of odd and even numbers based on the video save command And a high-resolution mode for saving the data in the field memory. In this case, depending on the low resolution mode, 2
When the two-dimensional video signal is saved in the field memory, at the time of the evacuation video output based on the evacuation video output command,
By interpolating the retracted two-dimensional video signal within a field, a two-dimensional video signal of a field different from the field type of the retracted two-dimensional video signal is generated, and the generated two-dimensional video signal is generated together with the retracted two-dimensional video signal. It is preferable to output the two-dimensional video signal alternately.

A second method of utilizing a field memory in a 2D / 3D video conversion apparatus according to the present invention is a method of utilizing a field memory from a two-dimensional video signal, a main video signal, and a sub video delayed with respect to the main video signal using the field memory. 2D / 2D / 3D image
A method for utilizing a field memory in a 3D video conversion device, wherein a 2D video display mode for directly outputting an input 2D video signal as a video display mode of the 2D / 3D video conversion device, There is a three-dimensional video display mode in which is converted into a three-dimensional video and output. When the three-dimensional video display mode is set, the latest two-dimensional video signal is stored based on the video storage command. Putting the field memory in a write-protected state,
The two-dimensional video signal stored in the write-protected field memory is output as a still image based on a stored video output command.

A low-resolution mode in which one field memory is in a write-protected state based on a video storage command as a mode for storing the two-dimensional video signal by setting the field memory in a write-protected state, and A high-resolution mode may be provided in which the two field memories storing the two-dimensional video signals of the odd and even fields are set in the write-protected state. In this case, when one of the field memories is set to the write-protected state in the low-resolution mode, it is stored in the write-protected field memory when the stored video is output based on the stored video output command. A two-dimensional video signal of a field different from the field type of the stored two-dimensional video signal is generated by intra-field interpolation of the two-dimensional video signal, and the stored two-dimensional video signal and the generated two-dimensional video signal are generated. It is preferable to alternately output a video signal. The 2D according to claim 3, wherein
/ 3D video conversion device using field memory.

[0013]

According to the first method of utilizing the field memory in the 2D / 3D video conversion apparatus according to the present invention, when the 2D video display mode is set, the input 2D video signal is input based on the video retraction command. Is saved in the field memory. The saved two-dimensional video signal is output as a still image based on the saved video output command.

In the second method of utilizing a field memory in a 2D / 3D video converter according to the present invention, the latest two-dimensional video signal is stored based on a video storage command when the three-dimensional video display mode is set. The written field memory is set in a write-protected state. The two-dimensional video signal stored in the write-protected field memory is output as a still image based on a stored video output command.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of a 2D / 3D video converter for converting a 2D video into a 3D video.

The 2D / 3D video converter generates a parallax by generating a left-eye video and a right-eye video by a field delay method, and generates a phase in both or one of the generated left-eye video and right-eye video. By performing the shift, the positional relationship between the subject and the reference screen surface is changed.

The input terminal 1 receives a two-dimensional video signal a. The two-dimensional video signal a is sent to the motion vector detection circuit 16, the plurality of field memories 11, and the video switching circuit 13, respectively.

As is well known, the motion vector detection circuit 16 generates data for detecting a motion vector based on a representative point matching method.
The data generated by the motion vector detection circuit 16 is sent to the CPU 20.

The representative point matching method will be briefly described. A plurality of motion vector detection areas are set in the video area of each field, and each motion vector detection area is divided into a plurality of small areas. A plurality of sampling points and one representative point are set in each of the small areas.

The difference (correlation value at each sampling point) between the video signal level of the sampling point in each small area in the current field and the video signal level of the representative point of the corresponding small area in the previous field is determined by each motion vector detection. Required for each area. Then, correlation values between sampling points having the same deviation with respect to the representative point are cumulatively added between small areas in each motion vector detection area. Then, in each motion vector detection area, the deviation of the point where the cumulative correlation value becomes minimum, that is, the deviation of the point having the highest correlation is extracted as the motion vector (movement of the subject) in the motion vector detection area. You.

The field memory 11 is provided for delaying the two-dimensional video signal a in units of fields and outputting it, and a plurality of field memories 11 are provided. Writing and reading of each field memory 11 are controlled by a memory control circuit 24.

The output b (the delayed two-dimensional video signal) of the field memory 11 is sent to the video switching circuit 13 and the interpolation circuit 12, respectively. The interpolation circuit 12 generates a vertical interpolation signal for the input signal b. The output c of the interpolation circuit 12 (the vertical interpolation signal of the delayed two-dimensional video signal) is sent to the video switching circuit 13.

Therefore, the input two-dimensional video signal a and the delayed two-dimensional video signal b
The delayed vertical interpolation signal c of the two-dimensional video signal b is input. The video switching circuit 13 supplies one of the signal b and the signal c (sub video signal) to the left image phase control circuit 14 and the right image phase control circuit 15,
The signal a (main video signal) is switched and output according to the moving direction of the subject. However, when the delay amount is 0,
Left image phase control circuit 14 and right image phase control circuit 15
The signal a is sent to both.

One of the signals b and c is selected based on whether the two-dimensional video signal a is an odd field or an even field. That is, a signal corresponding to the field type (odd field or even field) of the two-dimensional video signal a is selected from the signals b and c. The image switching by the image switching circuit 13 is performed by the CP
Controlled by U20.

Each of the phase control circuits 14 and 15 is provided to shift the display position of the input image in the horizontal direction by shifting the phase of the input image signal. The phase shift amount and the shift direction are controlled by the memory control circuit 24. Left image phase control circuit 14
Is sent to the left image output terminal 2. The output of the right image phase control circuit 15 is sent to the right image output terminal 3.

The CPU 20 controls the memory control circuit 24 and the video switching circuit 13. The CPU 20 includes a ROM 21 for storing the program and the like and a RAM 22 for storing necessary data. Data necessary for detecting a motion vector is sent from the motion vector detection circuit 16 to the CPU 20. The CPU 20 is connected to an operation / display unit 23 including various input means and a display.

The CPU 20 calculates the motion vector based on
The number of delay fields (delay amount) by the field memory 11 is calculated. That is, in principle, the delay amount is determined so that the delay amount is reduced when the motion vector is large, and is increased when the motion vector is small. When changing the delay amount, the delay amount is changed by the number of one field so that the delayed video changes smoothly.

The CPU 20 controls the video switching circuit 13 based on the direction of the motion vector. That is, when the direction of the motion vector is from left to right, the input 2
The two-dimensional video signal a or the delayed two-dimensional video signal b or c is supplied to the phase control circuit 15 for the right eye.
Send to When the direction of the motion vector is from right to left, the input two-dimensional video signal a is converted to the right-eye phase control circuit 14.
Then, the delayed two-dimensional video signal b or c is sent to the left-eye phase control circuit 15.

In this 2D / 3D video conversion apparatus, a parallax is generated by generating a left-eye image and a right-eye image by a field delay method, and a phase is applied to both or one of the generated left-eye image and right-eye image. By performing the shifting, the positional relationship between the subject and the reference screen surface is changed.

The 2D / 3D video converter has two display modes, a two-dimensional video display mode and a three-dimensional video display mode. In the two-dimensional video display mode, the input two-dimensional video signal is output from the output terminal 2 without being converted to a three-dimensional video signal. In the three-dimensional video display mode, the input two-dimensional video signal is converted into a three-dimensional video signal and output to the output terminals 2 and 3.

(1) Description of Video Evacuation Processing in Two-Dimensional Video Display Mode In the two-dimensional video display mode, when a video image that the operator wants to see as a still image, such as a recipe for cooking, is displayed, the operation is performed. The image is stored in the field memory 11 when the operator operates the image evacuation switch provided on the display unit 23. When the user wants to display the image saved in the field memory 11, the operation
When the operator operates the evacuation video output switch provided on the display unit 23, the video stored in the field memory 11 is displayed as a still video.

The operation / display unit 23 includes a saved image clear switch for clearing a specific image saved in the field memory 11 and the field memory 1.
Also provided is an evacuation image all clear switch for clearing all the images evacuated to 1.

For convenience of explanation, the field memory 11
It is assumed that six A to F are provided as shown in FIG. There are a low-resolution mode and a high-resolution mode as modes for saving a video in the field memory 11.
The setting and switching of these modes are performed by an evacuation mode setting switch provided in the operation / display unit 23.

Further, when video signals are saved in all the field memories A to F, an overwrite permission mode in which a new video signal can be written in the field memory, and an overwrite inhibition mode in which a new video signal cannot be written in the field memory The setting and switching of these modes are performed by an overwrite mode setting switch provided in the operation / display unit 23.

FIG. 3 shows a state where the image is saved in the field memories A to F and a state where the image saved in the field memories A to F is cleared when the low resolution mode is set. . In FIG. 3, time elapses from top to bottom. Each number indicates a field number. The leftmost column shows the field numbers of the two-dimensional video input to the input terminal 1. Also,
The number in parentheses indicates the field number of the evacuation video.

When a video retraction switch is turned on while a two-dimensional video signal of a certain field is being input, the two-dimensional video signal of the field two fields ahead is written to the field memory. The field memory to which the two-dimensional video signal has been written is put in a write-protected state. Write field memories are, in principle, A, B,
C ... F are selected in this order.

When the save video clear switch is turned on, the contents of the field memory designated by the save video clear switch are cleared and the write-protection state is released. When the save video all clear switch is turned on, the contents of all the field memories are cleared and the write-protected state is released.

In the low resolution mode, only the video signal of one field is written in the field memory. Therefore, when the video is output, the interpolated circuit 12 is used for the written video signal using the interpolation circuit 12. Is performed, a video signal of a field of a type different from the type of the field is generated. Then, the video of the odd field and the video of the even field are output alternately.

FIG. 4 shows a state where images are saved in the field memories A to F and a state where images saved in the field memories A to F are cleared when the high resolution mode is set. .

When a two-dimensional video signal of a certain field is input and the video save switch is turned on, the two-dimensional video signal of the field two fields ahead is written into the field memory, and the two-dimensional video signal three fields ahead. A two-dimensional video signal is written to the field memory. The field memory to which the two-dimensional video signal has been written is put in a write-protected state. In principle, the write field memories are selected in the order of A, B, C... F.

In the high-resolution mode, video signals of two fields, odd and even, are written to the field memory. Therefore, when the video is output, the video of the odd field and the video of the even field are written. Output alternately.

FIG. 5 and FIG. 6 show the procedure of the image saving process when the two-dimensional image mode is set.

The video saving process is performed every time the field of the two-dimensional video signal input to the input terminal 1 is switched. In the initial setting, the evacuation flag F is reset (F = 0) and the value of the progress counter is set to 0 (K =
0).

First, it is determined whether or not the image retreat switch has been turned on (step 1). If the video evacuation switch is not turned on, it is determined whether or not the evacuation flag F is set (step 2). Evacuation flag F
Is not set (F = 0), the current video retraction processing ends. Usually, the routine consisting of steps 1 and 2 is repeated.

(A) Description of the video saving process when the low resolution mode is set

When the video retraction switch is turned on in a certain field (field number n), YES is determined in step 1 and the retraction flag F is set (F = 1).
And the value of the progress counter is set to 0 (K = 0) (step 3). Then, the current video saving processing ends.

Next field (field number n + 1)
In the video saving process in step (1), the answer is NO in step 1 and it is determined whether or not the saving flag F is set (step 2). In this case, since the evacuation flag F is set, it is determined whether the high-resolution mode or the low-resolution mode is set (step 4).

When the low resolution mode is set, it is determined whether or not the count value K of the progress counter is 0 (step 5). In this case, the count value K
Is 0, it is determined whether the mode is the overwrite permission mode or the overwrite inhibition mode (step 6). If the mode is the overwrite prohibition mode, it is determined whether or not there is an empty memory among the field memories A to F, that is, whether or not there is a field memory in which the video is not saved (step 7).

If there is an empty memory, a field memory to which writing is to be performed is selected from the empty memory and writing is enabled, and a field written to the selected field memory is an odd field or an even field. Information on whether or not there is is generated and held (step 8). Actually, at the timing when the next vertical synchronizing signal is input, the above-mentioned field memory is set in the write permission state.

If it is determined in step 6 that the mode is the overwrite permission mode, the flow shifts to step 8 to select a field memory in which writing is to be performed in a predetermined order and set the field memory in a write permission state. Information indicating whether the field written to the memory is an odd field or an even field is generated and held.

Since the data of the next field is written in the memory selected in step 6 in the next field (field number n + 2), the type of the field to be written in the selected field memory at the time of step 8 above Can be grasped.

Next, the count value K of the elapsed counter is incremented by 1, that is, the count value K is set to 1 (step 9), and the current image retreat processing ends.

Next field (field number n + 2)
In, the two-dimensional video signal of the input field is stored in the field memory in which the writing is enabled in step 8.

This field (field number n + 2)
In the video saving process in step (1), the answer is NO in step 1 and it is determined whether or not the saving flag F is set (step 2). In this case, since the evacuation flag F is set, it is determined whether the high-resolution mode or the low-resolution mode is set (step 4).

When the low resolution mode is set, it is determined whether or not the count value K of the elapsed counter is 0 (step 4). In this case, the count value K
Is 1, so that the field memory (the field memory in which the video is saved) selected in the previous step 8 is put in a write-protected state (step 10). Actually, at the timing when the next vertical synchronizing signal is input, the field memory is set in the write-protected state.

Next, the evacuation flag F is reset (F =
0) and the count value K of the progress counter becomes 0
(Step 11). Then, the fact that the two-dimensional video signal of the current field (field number n + 2) has been saved in the field memory is displayed on the operation / display unit 23 (step 12), and the current video saving process ends.

If there is no free memory in step 7, a message indicating that the video signal cannot be saved in the field memory is displayed on the operation / display section 23 (step 13). Then, the evacuation flag F is reset (F
= 0) and the count value K of the progress counter is set to 0 (step 14), and then the current video retraction processing ends.

(B) Description of the video saving process when the high resolution mode is set

When a video save switch is turned on in a certain field (field number n), YES is determined in step 1 and the save flag F is set (F = 1).
And the value of the progress counter is set to 0 (K = 0) (step 3). Then, the current video saving processing ends.

Next field (field number n + 1)
In the video saving process in step (1), the answer is NO in step 1 and it is determined whether or not the saving flag F is set (step 2). In this case, since the evacuation flag F is set, it is determined whether the high-resolution mode or the low-resolution mode is set (step 4).

When the high-resolution mode is set, the process proceeds to step 15, where it is determined whether the overwrite permission mode or the overwrite inhibition mode is set. If the overwrite inhibition mode has been set, it is determined whether or not the count value K of the elapsed counter is 0 (step 16). In this case, the count value K is 0
Therefore, the process proceeds to step 17, where it is determined whether or not there are two or more empty memories (step 17).

When there are two or more free memories, two field memories to be written are selected from among them, and one of the first field memories is set in a write-permitted state, and Is generated and stored as to whether the field to be written is an odd field or an even field (step 18).

Next, the count value K of the elapsed counter is incremented by 1, that is, the count value K is set to 1 (step 1).
9), the current video saving processing ends.

If the overwrite permission mode is set in step 15 of the video saving process in the field of the field number n + 1, the count value K of the progress counter is determined (step 22). In this case, since the count value K is 0, the process proceeds to step 18, where two field memories to be written are selected in a predetermined order, and one of the first field memories is set in a write-enabled state. At the same time, information as to whether the field written to the first field memory is an odd field or an even field is generated and held.

Next, the count value K of the elapsed counter is incremented by 1, that is, the count value K is set to 1 (step 1).
9), the current video saving processing ends.

Next field (field number n + 2)
In the first method, the two-dimensional video signal of the input field is changed to the first
Stored in field memory.

This field (field number n + 2)
In the video saving process in step (1), the answer is NO in step 1 and it is determined whether or not the saving flag F is set (step 2). In this case, since the evacuation flag F is set, it is determined whether the high-resolution mode or the low-resolution mode is set (step 4).

When the high resolution mode is set, it is determined whether the overwrite permission mode or the overwrite inhibition mode is set (step 1).
5). If the overwrite inhibition mode has been set, it is determined whether or not the count value K of the elapsed counter is 0 (step 16). In this case, the count value K is 1
Therefore, the process proceeds to step 22, where the count value K of the elapsed counter is determined (step 22).

In this case, since the count value K is 1, the first field memory previously set in the write-enabled state in step 18 is set in the write-inhibited state (step 23). In addition, the other second field memory of the two field memories selected in the previous step 18 is set to the write enabled state, and the field written to the second field memory is an odd field or an even field. Information on whether there is is generated and held.

Next, the count value K of the elapsed counter is incremented by 1, that is, the count value K is incremented by 2 (step 1).
9), the current video saving processing ends.

If the overwrite permission mode is set in step 15 of the video saving process in the field of the field number n + 1, after the processes of steps 22, 23, and 19 described above are performed, the current video saving is performed. The process ends.

Next field (field number n + 3)
In the above, the two-dimensional video signal of the input field is changed to the second
Stored in field memory.

This field (field number n + 3)
In the video saving process in step (1), the answer is NO in step 1 and it is determined whether or not the saving flag F is set (step 2). In this case, since the evacuation flag F is set, it is determined whether the high-resolution mode or the low-resolution mode is set (step 4).

When the high resolution mode is set, it is determined whether the overwrite permission mode or the overwrite inhibition mode is set (step 1).
5). If the overwrite inhibition mode has been set, it is determined whether or not the count value K of the elapsed counter is 0 (step 16). In this case, the count value K is 2
Therefore, the process proceeds to step 22, where the count value K of the elapsed counter is determined (step 22).

In this case, since the count value K is 2, the second field memory previously designated in step 23 is set in a write-protected state (step 2).
4).

Next, the evacuation flag F is reset (F =
0) and the count value K of the progress counter becomes 0
(Step 25). Then, the fact that the two-dimensional video signal of the current field (field number n + 2) has been saved in the field memory is displayed on the operation / display unit 23 (step 26), and the current video saving process ends.

If the overwrite permission mode is set in step 15 of the image save processing in the field of the field number n + 2, after the processing of steps 22, 24, 25, and 26 described above is performed, The video saving process ends.

If it is determined in step 17 that there are not two or more empty memories, a message indicating that the video signal cannot be saved in the field memory is displayed on the operation / display section 23 (step 20). Then, after the evacuation flag F is reset (F = 0) and the count value K of the progress counter is set to 0 (step 21), the current image evacuation processing ends.

(2) Description of the image retraction process in the three-dimensional image display mode

When the three-dimensional video display mode is set, a two-dimensional video signal is converted into a three-dimensional video signal by the 2D / 3D video conversion circuit. Therefore, in order to generate a delayed two-dimensional video signal, in principle, the input video signals of each field are sequentially stored in the field memories A to F.

In the three-dimensional image display mode, when an image that the operator wants to see as a still image is displayed, the operator operates an image evacuation switch provided in the operation / display unit 23 to thereby display the image. The field memory storing the video closest to the point in time is set to the write-protected state. Then, when it is desired to display the video stored in the write-protected field memory,
When the operator operates the evacuation video output switch provided on the operation / display unit 23, the video stored in the field memory is displayed as a still video.

In the low-resolution mode, one field memory storing the video of the field closest to the time when the video save switch is turned on is set to the write-protected state. In the high-resolution mode, the two field memories storing the video of the field closest to the point when the video save switch is turned on and the field next to the next are in the write-protected state.

In the three-dimensional image display mode, only one image can be held as a save image. Therefore, when one image is already held as the save image and a new image is held as the save image, the write-protection state of the field memory holding the previous save image is released.

FIG. 7 shows a state in which the field memories A to F are write-protected when the low-resolution mode is set, and the contents thereof are held as save images, and are saved in the field memories A to F. This shows how the image is cleared. In FIG. 7, time elapses from top to bottom. Each number indicates a field number. The numbers in parentheses indicate the field numbers of the evacuation video.

When a video save switch is turned on while a two-dimensional video signal of a certain field is being input, one field memory storing the two-dimensional video signal of the latest field is set in a write-protected state. You.

When the evacuation video clear switch is turned on, the write-protected state of one field memory which has already been written is released.

In the low-resolution mode, only the video signal of one field is stored in the field memory as the save video, so when outputting that video, the interpolation circuit 12 is used for the stored video signal. By performing intra-field interpolation, a video signal of a field of a type different from the type of the field is generated. And
The odd field video and the even field video are output alternately.

FIG. 8 shows a state in which the field memories A to F are in the write-protected state when the high-resolution mode is set, and the contents thereof are held as save images, and are saved in the field memories A to F. This shows how the image is cleared.

When a video retraction switch is turned on when a two-dimensional video signal of a certain field is input, two field memories storing the latest field and the next new two-dimensional video signal are written. It is prohibited.

When the save video clear switch is turned on, the write-protected state of the two field memories which are already in the written state is released.

In the high-resolution mode, the video signals of the two fields, odd and even, are written to the two field memories as the escaped video. Therefore, when outputting the video, the odd numbers stored in the two field memories are output. Field images and even field images are output alternately.

FIG. 9 shows an image saving procedure when the three-dimensional image mode is set.

This video saving process is performed every time the field of the two-dimensional video signal input to the input terminal 1 is switched.

First, it is determined whether or not the video retraction switch has been turned on (step 31). When the video saving switch is not turned on, the current video saving process ends.

When the video retraction switch is turned on,
It is determined whether or not any of the field memories A to F is in a write-protected state (step 32).

If none of the field memories A to F has been set to the write protected state, the field memory storing the latest video is set to the write protected state (step 33). At this time, if the low resolution mode is set, one field memory storing the latest field data is set in the write-protected state, and if the high resolution mode is set, the latest field data and the next field data are stored. Are stored in the write-protection state.

As described above, when one or two field memories are set in the write-protected state, it is necessary to change the maximum delay amount accordingly, so that the relationship between the motion vector and the delay amount is changed ( Step 34).

Next, after the fact that the image has been saved is displayed on the operation / display unit 23 (step 35), the current image retreat processing ends.

In step 32, if any of the field memories A to F is already in the write-protected state, it is determined whether the mode is the overwrite-permitted mode or the overwrite-prohibited mode (step 36). .

If the mode is the overwrite permission mode, the write protection state of the field memory which is already in the write protection state is released (step 37). Then, similarly to step 33, the field memory storing the latest video is set in a write-protected state (step 3).
8).

Further, in order to prevent a field stored in the field memory from which the write-protected state has been released in the above step 37 from being output as a delayed image, the number of delayed fields for the next field is set to 0 ( Step 39).

Then, after a message to the effect that the video has been saved is displayed on the operation / display unit 23 (step 35), the current video retraction processing ends.

In step 36, if the overwrite-inhibited mode is set, after the operation / display unit 23 indicates that the image could not be saved (step 4).
0), the current video saving process ends.

[0105]

According to the present invention, in the 2D / 3D video converter, the field memory which is not used when the 2D video display mode is set can be effectively used.

Further, according to the present invention, the field memory can be effectively used even when the three-dimensional image display mode is set in the 2D / 3D image converter.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a 2D / 3D video conversion device.

FIG. 2 is an electric circuit diagram showing a specific example of a field memory.

FIG. 3 is a time chart showing a state in which a two-dimensional image is saved when a low resolution mode is set in a two-dimensional image display mode.

FIG. 4 is a time chart showing a state in which a two-dimensional image is retracted when a high-resolution mode is set in a two-dimensional image display mode.

FIG. 5 is a flowchart showing a video save processing procedure in a two-dimensional video display mode.

FIG. 6 is a flowchart illustrating a video save processing procedure in a two-dimensional video display mode.

FIG. 7 is a time chart showing how a two-dimensional image stored in a field memory is stored as a save image when a low-resolution mode is set in the three-dimensional image display mode.

FIG. 8 is a time chart showing a state in which a two-dimensional image stored in a field memory is stored as a save image when a high-resolution mode is set in a three-dimensional image display mode.

FIG. 9 is a flowchart illustrating a video save processing procedure in the three-dimensional video display mode.

[Explanation of symbols]

 Reference Signs List 11 field memory 12 interpolation circuit 13 video switching circuit 14, 15 phase control circuit 20 CPU 21 ROM 22 RAM 23 operation / display section 24 memory control circuit

Claims (4)

(57) [Claims] 1. A two-dimensional video is converted into a three-dimensional video by generating a main video signal and a sub-video signal delayed from the main video signal using a field memory from the two-dimensional video signal. A method for utilizing a field memory in a 2D / 3D video conversion device, comprising: a two-dimensional video display mode in which an input two-dimensional video signal is output as it is; There is a three-dimensional video display mode to dimension the video signal 3D image to <br/> to convert the output, when the 2-dimensional image display mode is set, based on the image saving command is input In front of a 2D video signal
A method of utilizing a field memory in a 2D / 3D video conversion device, wherein the 2D video signal is saved in a field memory, and the saved 2D video signal is output as a still image based on a saved video output command. Wherein the low resolution mode to retract the two-dimensional image signal for one field based on the image saving command to the field memory as save mode, two-dimensional two fields of odd and even on the basis of the image saving command Before video signal
There is a high resolution mode for saving the serial field memories, if the two-dimensional image signal by the low-resolution mode is saved in the Fi <br/> Rudomemori, upon retraction video output based on saving the image output command is retracted By interpolating the existing two-dimensional video signal within the field, a two-dimensional video signal of a field different from the field type of the two-dimensional video signal being saved is generated, and the two-dimensional video signal generated as the saved two-dimensional video signal is generated. 2. The method according to claim 1, wherein the two-dimensional video signal and the two-dimensional video signal are output alternately. 3. A two-dimensional video is converted into a three-dimensional video by generating a main video signal and a sub-video signal delayed from the main video signal using a field memory from the two-dimensional video signal. A method for utilizing a field memory in a 2D / 3D video conversion device, comprising: a two-dimensional video display mode in which an input two-dimensional video signal is output as it is; There is a three-dimensional image display mode and outputs the <br/> convert dimensions video signal to a 3D image, when the three-dimensional image display mode is set, based on the image storage command, the most recent 2 and said field store dimension video signal is stored in the write-protected state, the two-dimensional image signal stored in said field memory which is write-protected state, storage image output command A method for utilizing a field memory in a 2D / 3D video conversion device, wherein the method outputs a still image based on a video. 4. A low-resolution mode for one of the field memories on the basis of the image storing command as a mode for storing two-dimensional image signal by the field memory to write protected write-protected state, the image storage instruction There is a high-resolution mode to the two said field store two-dimensional image signal of the odd and even fields are stored in the write-protected state based, one said field memory by the low-resolution mode is write-protected state and if, at the time of saving the video output based on the storage image output command, by intra-field interpolating 2D image signal stored in said field memory which is write-protected state, two-dimensional image signal stored 2D video signal of a field different from the field type of Field memory utilization method in the 2D / 3D video conversion apparatus according to claim 3, characterized in that to output the 2D image signal and the generated two-dimensional image signal that alternately.