JPH0865713A - Stereoscopic image signal conversion device - Google Patents

Abstract

PURPOSE: To convert the stereoscopic image signals which alternately show the right and left images into those signals which simultaneously show both images by outputting a 1st stereoscopic image signal and then selectively outputting the right and left image signals later than the 1st image signal by a prescribed period. CONSTITUTION: The input stereoscopic image signals are stored in field memory in each field period, and the image signals are outputted to a vertical compensation circuit 1 later than those input image signals by a field period. A line memory (1H memory) 21 of the circuit 2 stores and then outputs the input image signals in each horizontal line period. An addition circuit 22 adds the image signals received from the memory 1 in a horizontal period to the image signals received from the memory 21 in a precedent horizontal line period. A 1/2 coefficient circuit 23 secures the average of outputs of the circuit 22 and produces a vertical direction interpolation signal. This interpolation signal is inputted to a switch 32 of a switching circuit 3, and the input stereoscopic image signal is inputted to the other switch 31. Both switches 31 and 32 convert the stereoscopic image signals that alternately show the right and left images into those signals that simultaneously show the right and left images.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic image signal converting apparatus for converting a stereoscopic image signal of a method of alternately switching left and right images to a stereoscopic image signal of a method of simultaneously presenting left and right images.

[0002]

2. Description of the Related Art A three-dimensional image display method is roughly classified into a method of alternately presenting left and right images and a method of presenting left and right images at the same time. There is a time-division spectacle method as a method of alternately switching the left and right images to be presented. The method of presenting the left and right images at the same time includes a color spectacle method, a polarized spectacle method, a parallax barrier method, a lenticular method, an integral method, and the like.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The image software for the time-sharing glasses method for alternately switching the left and right images to present a stereoscopic image for a method of simultaneously presenting the left and right images such as a parallax barrier method and a lenticular method. If it can be displayed on the image display device, the range of use of the video software is expanded.

The present invention provides a stereoscopic image signal conversion device capable of converting a stereoscopic image signal of a system in which left and right images are alternately switched and presented to a stereoscopic image signal of a system in which left and right images are simultaneously presented. To aim.

[0005]

According to a first stereoscopic image signal conversion apparatus of the present invention, a first stereoscopic image signal in which a left image signal and a right image signal alternately appear every predetermined period is referred to as a left image signal. In the stereoscopic image signal conversion device for converting the right image signal into a second stereoscopic image signal that appears at the same time,
Of the first stereoscopic image signal and the image signal delayed by the predetermined period with respect to the first stereoscopic image signal from the means for generating the image signal delayed by the predetermined period with respect to the stereoscopic image signal of It is characterized by further comprising means for selecting an image signal and outputting it as a left image signal, and at the same time selecting a right image signal and outputting it as a right image signal.

In the second stereoscopic image signal converting apparatus according to the present invention, the left image signal and the right image signal simultaneously generate the first stereoscopic image signal in which the left image signal and the right image signal appear alternately every predetermined period. A stereoscopic image signal conversion device for converting into a appearing second stereoscopic image signal, means for generating an image signal delayed by the predetermined period from the first stereoscopic image signal,
Means for generating a vertical direction interpolation signal of the image signal delayed by the predetermined period with respect to the first stereoscopic image signal, and a signal for the left image is selected from the first stereoscopic image signal and the vertical direction interpolation signal. Then, a means for outputting a left image signal and at the same time selecting a signal for the right image and outputting it as a right image signal is provided.

In the third stereoscopic image signal conversion apparatus according to the present invention, the left image signal and the right image signal simultaneously generate the first stereoscopic image signal in which the left image signal and the right image signal appear alternately every predetermined period. A stereoscopic image signal conversion device for converting into a appearing second stereoscopic image signal, means for generating an image signal delayed by the predetermined period from the first stereoscopic image signal,
Means for generating an image signal delayed by a period twice the predetermined period with respect to the first stereoscopic image signal, the first stereoscopic image signal and the first stereoscopic image signal within the predetermined period. A means for generating a time-axis direction interpolation signal in which the interpolation signal in the time-axis direction of the left image and the interpolation signal in the time-axis direction of the right image alternately appear in each of the predetermined periods based on the image signal delayed by a double period. A means for generating a vertical direction interpolation signal of the time axis direction interpolation signal, and a signal for the left image is selected from the image signal delayed by the predetermined period with respect to the first stereoscopic image signal and the vertical direction interpolation signal. Then, a means for outputting a left image signal and at the same time selecting a signal for the right image and outputting it as a right image signal is provided.

[0008]

In the first stereoscopic image signal converting apparatus according to the present invention, the image signal delayed by the predetermined period from the first stereoscopic image signal in which the left image signal and the right image signal alternately appear every predetermined period. Is generated. Then, the left image signal is selected from the first stereoscopic image signal and the image signal delayed by the predetermined period with respect to the first stereoscopic image signal and is output as the left image signal, and at the same time, the right image signal is selected. Is output as a right image signal.

In the second stereoscopic image signal conversion apparatus according to the present invention, the image signal delayed by the predetermined period from the first stereoscopic image signal in which the left image signal and the right image signal alternately appear every predetermined period. Is generated. Next, a vertical interpolation signal of the image signal delayed by the predetermined period with respect to the first stereoscopic image signal is generated. Then, from the first stereoscopic image signal and the vertical direction interpolation signal, the signal for the left image is selected and output as the left image signal, and at the same time, the signal for the right image is selected and output as the right image signal.

In the third stereoscopic image signal conversion apparatus according to the present invention, the image signal delayed by the predetermined period from the first stereoscopic image signal in which the left image signal and the right image signal alternately appear every predetermined period. Is generated. Further, an image signal that is delayed from the first stereoscopic image signal by a period that is twice the predetermined period is generated.

On the basis of the first stereoscopic image signal and the image signal delayed from the first stereoscopic image signal by a period twice the predetermined period, the interpolation signal in the time axis direction of the left image and the time of the right image are obtained. A time-axis direction interpolation signal is generated in which the axis-direction interpolation signal alternates every predetermined period. Further, a vertical direction interpolation signal of the time axis direction interpolation signal is generated.

Then, a signal for the left image is selected from the image signal delayed by the predetermined period and the vertical interpolation signal with respect to the first stereoscopic image signal and output as a left image signal, and at the same time for the right image. The signal is selected and output as the right image signal.

[0013]

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

First, a first embodiment of the present invention will be described with reference to FIGS.

FIG. 1 shows the configuration of a stereoscopic image signal conversion device for converting a stereoscopic image signal of a system in which right and left images are alternately switched and presented to a stereoscopic image signal of a system in which left and right images are simultaneously presented.

The stereoscopic image signal conversion device comprises a field memory 1, a vertical direction interpolation circuit 2 and a switching circuit 3. The field memory 1 stores and outputs the input stereoscopic image signal for each one field period. The vertical interpolation circuit 2 generates a vertical interpolation signal based on the image signal sent from the field memory 1.

The vertical direction interpolation circuit 2 includes a line memory (1
H memory) 21, adder circuit 22 and 1/2 coefficient circuit 2
Consists of three. The image signal sent from the field memory 1 is stored in the line memory 21 for each one horizontal line period and output. In the adder circuit 22, the image signal of a certain horizontal line period sent from the field memory 1 and the image signal of the previous horizontal line period sent from the line memory 21 are added. In the 1/2 coefficient circuit 23, the output of the adder circuit 22 is averaged.

The switching circuit 3 includes two switches 3
1 and 32. Each switch 31, 32 is
The signal input thereto is alternately switched between right image output (R output) and left image output (L output). When one switch 31 is switched to the R output side, the other switch 32 is switched to the L output side,
When one switch 31 is switched to the L output side, the other switch 32 is switched to the R output side.

FIG. 2 shows signals of the respective parts of FIG.
In FIG. 2, VD indicates a vertical synchronizing signal signal. Left and right images are alternately sent to the input terminal of the stereoscopic image signal conversion device for each field. In this example, the input terminal, the left image signal L _o, the right image signal R _1, the left image signal L _2, the right image signal R ₃ ... sequentially with coming 3D image signal is sent to.

The input stereoscopic image signal is stored in the field memory 1
Sent to Then, after the image signal for one field period is accumulated in the field memory 1, it is output from the field memory 1. Therefore, the field memory 1 outputs an image signal delayed by one field period with respect to the input stereoscopic image signal. The image signal output from the field memory 1 is sent to the vertical direction interpolation circuit 2.
The vertical direction interpolation circuit 2 generates a vertical direction interpolation signal of the image signal of each input field. The vertical interpolation signal is applied to one switch 32 of the switching circuit 3.
Sent to The signal output from the vertical direction interpolation circuit 2, L _o in Figure _{2 ', R 1', L} 2 ', R 3' represents at ....

The other switch 31 of the switching circuit 3
An input stereoscopic image signal is input to. At the timing when the signal L _o 'is input to the switch 32, the switch 31
The signal R ₁ is input to. Further, at the timing when the signal R ₁ ′ is input to the switch 32, the signal L ₂ is input to the switch 31. Each of the switches 31 and 32 outputs the input signal as a left image signal (L output) when the input signal is a signal for the left image, and when the input signal is a signal for the right image, the input signal is the right image. It is switched to output as a signal (R output).

For example, the signal L is supplied to the switch 32.₀’Enter
Is applied to switch 31 and signal R₁When typing
Switch 32 is switched to the L output side,
31 is switched to the R output side. Therefore, R output
Is R₁, R₁’、 R₃, R ₃’... and L output
Is L₀’、 L₂, L₂’、 L_Four, L_Four’...
In other words, the method of displaying the left and right images alternately
A stereoscopic image in which body image signals present left and right images at the same time.
It is converted into an image signal.

In the above embodiment, in order to obtain R output or L output for one frame by the input stereoscopic image signal of each field and the vertical direction interpolation signal of the field,
Although the vertical direction interpolation circuit 2 is provided, the vertical direction interpolation circuit 2 may be omitted. If the vertical direction interpolation circuit 2 is omitted, the R output or the L output is the input stereoscopic image signal of the same field repeated twice.

The switches 31 and 32 are controlled by a controller (not shown). The switching timing of the switches 31 and 32 is controlled based on the vertical synchronization signal. The switching direction of the switches 31 and 32 is determined depending on whether the first field of the input stereoscopic image signal is the left image or the right image.

Since it is generally predetermined whether the first field of the input stereoscopic image signal is the left image or the right image, the switching directions of the switches 31 and 32 are controlled based on that. If it is not predetermined whether the first field of the input stereoscopic image signal is the left image or the right image, an identification signal indicating whether the first field of the input stereoscopic image signal is the left image or the right image. , And the switching direction of the switches 31 and 32 may be controlled based on the identification signal.

Next, a second embodiment of the present invention will be described with reference to FIGS. 3 and 4.

FIG. 3 shows a configuration of a stereoscopic image signal conversion device for converting a stereoscopic image signal of a method of alternately switching left and right images to a stereoscopic image signal of a method of simultaneously presenting left and right images.

The three-dimensional image signal conversion device comprises a time axis direction interpolation circuit 11, a vertical direction interpolation circuit 12 and a switching circuit 13. Time axis direction interpolation circuit 11
Generates an interpolation signal (time-axis direction interpolation signal) between adjacent fields between the left image signals of the input image signals or between the right image signals thereof. The vertical direction interpolation circuit 12 generates a vertical direction interpolation signal of the time axis direction interpolation signal generated by the time axis direction interpolation circuit 11.

The time axis direction interpolation circuit 11 comprises a first field memory 41, a second field memory 42, a switching circuit 43, an adding circuit 44 and a 1/2 coefficient circuit 45. The switching circuit 43 includes two switches 5
1 and 52.

Each of the switches 51 and 52 alternately switches the input signal input thereto to the b output (signal b) and the c output (signal c). When one switch 51 is switched to the b output side, the other switch 52 is switched to the c output side, and one switch 51
Is switched to the c output side, the other switch 52 is switched to the b output side. The operation of the time axis direction interpolation circuit 11 will be described later.

The structure of the vertical direction interpolation circuit 12 is the same as the structure of the vertical direction interpolation circuit 2 of FIG. That is, the vertical direction interpolation circuit 12 includes a line memory (1H memory) 61,
It is composed of an adder circuit 62 and a 1/2 coefficient circuit 63. The time-axis direction interpolation signal sent from the time-axis direction interpolation circuit 11 is stored and output to the line memory 61 for each one horizontal line period. In the adder circuit 62, the time axis direction interpolation signal of a certain horizontal line period sent from the time axis direction interpolation circuit 11 and the time axis direction interpolation signal of the previous horizontal line period sent from the line memory 61. Is added. In the 1/2 coefficient circuit 63, the output of the adder circuit 62 is averaged.

The configuration of the switching circuit 13 is the same as the configuration of the switching circuit 3 of FIG. That is, the switching circuit 13 includes two switches 71 and 72. The switches 71 and 72 alternately switch the input signal between the right image output (R output) and the left image output (L output). When one switch 71 is switched to the R output side, the other switch 72 is set to L
When the switch 71 is switched to the output side and one switch 71 is switched to the L output side, the other switch 72 is switched to the R output side.

FIG. 4 shows signals of the respective parts of FIG.
In FIG. 4, VD indicates a vertical synchronizing signal signal. Left and right images are alternately sent to the input terminal of the stereoscopic image signal conversion device for each field. In this example, the input terminal, the left image signal L _o, the right image signal R _1, the left image signal L _2, the right image signal R ₃ ... sequentially with coming 3D image signal is sent to.

The input stereoscopic image signal is supplied to the first field memory 41 and the second field memory 4 as follows.
2 is written and then read. In the first field memory 41, writing is performed every one field period from the first field of the input stereoscopic image signal, and the odd-numbered input stereoscopic image signal a is written. The reading of the first field memory 41 is performed every one field period. However, the first field memory 4
From 1, the signals of the same field are read out twice.

[0035] In this example, since the odd field of the input 3D image signal a is in the left image signal L _0, the first field memory 41, the left image signal _{L 0, L 2, L 4} ... only written . Then, each written left image signal L ₀ , L ₂ , L _4, ... Is read twice. Therefore, the output of the first field memory 41 is L ₀ ,
L ₀ , L ₂ , L ₂ , L ₄ , L ₄ ...

Writing to the second field memory 42 is performed every other field period from the second field of the input stereoscopic image signal, and the even-numbered input stereoscopic image signal a is written. The reading of the second field memory 42 is performed every one field period. However, the signal of the same field is read from the second field memory 42 twice in succession.

[0037] In this example, the even field of the input 3D image signal a is because it is the right image signal R _1, the second field memory 42, the right image signal R _1, R _3, R ₅ ... only is written. Then, each of the written right image signals R ₁ , R ₃ , R _5, ... Is read twice. Therefore, the output of the second field memory 42 is R ₁ ,
R ₁ , R ₃ , R ₃ , R ₅ , R ₅ ...

The output of the first field memory 41 is input to the switch 51. In addition, the second field memory 42
The output of is input to the switch 52. The switch 51 is
The output of the first field memory 41 input thereto is alternately switched to the b output side or the c output side and output. The switch 52 has a second field memory 42 for inputting to it.
The output of is alternately switched to the b output side or the c output side and output.

As a result, a signal delayed by one field period from the input stereoscopic image signal a is obtained as the output b. Further, as the c output, a signal delayed by two field periods with respect to the input stereoscopic image signal a is obtained.

The signal c is sent to the adding circuit 44 and added to the input stereoscopic image signal a. Then, after this, the 1/2 coefficient circuit 45 takes the average. Therefore, 1
The output (signal d) of the / 2 coefficient circuit 45 is (L ₀ + L ₂ ).
/ 2, (R ₁ + R ₃ ) / 2, (L ₂ + L ₄ ) / 2, (R
₃ + R ₅ ) / 2 ... That is, the time-axis direction interpolation circuit 11 causes the interpolated signals of the images between the adjacent fields of the input left images and the interpolated signals of the images of the adjacent fields of the input right images to alternately appear. An axial interpolation signal d is obtained.

The time-axis direction interpolation signal d obtained by the time-axis direction interpolation circuit 11 is sent to the vertical direction interpolation circuit 12. The vertical direction interpolation circuit 12 generates a vertical direction interpolation signal e of the time axis direction interpolation signal d.

The vertical interpolation signal e is sent to one switch 71 of the switching circuit 13. The signal e output from the vertical direction interpolation circuit 12 is shown in FIG. 4 as {(L ₀ +
_{L 2) / 2} ',} {(R 1 + R 3) / 2}', {(L 2
+ L ₄ ) / 2} ', {(R ₃ + R ₅ ) / 2}' ... In the other switch 72 of the switching circuit 13,
Signal b is being sent.

A signal {(L ₀ + L ₂ ) /
At the timing when 2} ′ is input, the signal R ₁ is input to the switch 72. In addition, a signal {(R ₁
At the timing when + R ₃ ) / 2} ′ is input, the signal L ₂ is input to the switch 72. Each switch 71, 72
Outputs the input signal as a left image signal (L output) when the input signal is a signal for the left image, and outputs the input signal as a right image signal (R output) when the input signal is a signal for the right image. Can be switched to output as.

For example, a signal {(L ₀ +
When L ₂ ) / 2} ′ is input and the signal R ₁ is input to the switch 72, the switch 71 is switched to the L output side, and the switch 72 is switched to the R output side.
Therefore, the R output is R ₁ , {(R ₁ + R ₃ ) /
2} ', R ₃ , {(R ₃ + R ₅ ) / 2}' ...
The L output is L ₀ , {(L ₀ + L ₂ ) / 2} ′, L ₂ ,
{(L ₂ + L ₄ ) / 2} ′, L ₄ ... That is,
The stereoscopic image signal of the method of alternately switching the left and right images to be presented is converted into the stereoscopic image signal of the method of simultaneously presenting the left and right images.

In the above embodiment, the signal b delayed by one field period with respect to the input stereoscopic image signal a and the signal c delayed by two field periods with respect to the input stereoscopic image signal a are connected in parallel to each other. Field memory 41, 42
And two switches 51 and 52 respectively connected to the field memories 41 and 42 respectively.

However, as in the time axis direction interpolation circuit 100 shown in FIG. 5, the two field memories 101 and 102 connected in series to each other cause the signal b delayed by one field period with respect to the input stereoscopic image signal a. , A signal c delayed by two field periods with respect to the input stereoscopic image signal a
And may be generated. In the circuit of FIG. 5, writing and reading are performed in the field memory 101 in the preceding stage every one field period, so that a signal b delayed by one field period from the input stereoscopic image signal a is generated from the field memory 101 in the preceding stage. To be done. This signal b is also sent to the field memory 101 at the subsequent stage. By writing and reading the field memory 102 in the subsequent stage every one field period, a signal c delayed from the input stereoscopic image signal a by two field periods is generated from the field memory 102 in the subsequent stage.

As shown in FIG. 3, two field memories 4 are provided.
In the case where the signals b and c are generated by the switches 1 and 42 and the two switches 51 and 52, the signals b and c are generated by the two field memories 101 and 102 connected in series as shown in FIG. Compared with, there is an advantage that the number of times of writing to each field memory is reduced and power consumption can be reduced.

[0048]

According to the present invention, it is possible to convert a stereoscopic image signal of a system in which right and left images are alternately switched and presented to a stereoscopic image signal of a system in which left and right images are simultaneously presented.

[Brief description of drawings]

FIG. 1 is an electrical block diagram showing the configuration of a stereoscopic image signal conversion device that is a first embodiment of the present invention.

FIG. 2 is a time chart showing signals of respective parts of FIG.

FIG. 3 is an electrical block diagram showing a configuration of a stereoscopic image signal conversion device which is a second embodiment of the present invention.

FIG. 4 is a time chart showing signals of respective parts of FIG.

FIG. 5 is an electrical block diagram showing a modification of the time axis direction interpolation circuit.

[Explanation of symbols]

 1 Field Memory 2 Vertical Interpolation Circuit 3 Switching Circuit 11, 100 Time Axis Direction Interpolation Circuit 12 Vertical Direction Interpolation Circuit 13 Switching Circuit

Claims (4)

[Claims] 1. A stereoscopic image converting a first stereoscopic image signal in which a left image signal and a right image signal appear alternately every predetermined period into a second stereoscopic image signal in which a left image signal and a right image signal appear at the same time. In the image signal conversion device, means for generating an image signal delayed by the predetermined period with respect to the first stereoscopic image signal, and the predetermined with respect to the first stereoscopic image signal and the first stereoscopic image signal. A stereoscopic image signal conversion, comprising means for selecting a left image signal from an image signal delayed by a period and outputting it as a left image signal, and at the same time selecting a right image signal and outputting it as a right image signal. apparatus. 2. A stereoscopic image converting a first stereoscopic image signal in which a left image signal and a right image signal appear alternately every predetermined period into a second stereoscopic image signal in which a left image signal and a right image signal appear at the same time. In the image signal conversion device, means for generating an image signal delayed by the predetermined period with respect to the first stereoscopic image signal, and a vertical direction of the image signal delayed by the predetermined period with respect to the first stereoscopic image signal. Means for generating an interpolation signal, and a signal for the left image is selected from the first stereoscopic image signal and the vertical interpolation signal and output as a left image output, and at the same time, a signal for the right image is selected as a right image signal. A stereoscopic image signal conversion device comprising: a means for outputting. 3. A stereoscopic image that converts a first stereoscopic image signal in which a left image signal and a right image signal appear alternately every predetermined period into a second stereoscopic image signal in which a left image signal and a right image signal appear at the same time. In the image signal conversion device, means for generating an image signal delayed by the predetermined period with respect to the first stereoscopic image signal, and delayed by a period twice the predetermined period with respect to the first stereoscopic image signal. A means for generating an image signal; the first stereoscopic image signal and the interpolation of the left image in the time axis direction based on the first stereoscopic image signal and an image signal delayed from the first stereoscopic image signal by a period twice the predetermined period. A signal and a means for generating a time-axis direction interpolation signal in which the time-axis direction interpolation signal of the right image appears alternately every predetermined period, a means for generating a vertical direction interpolation signal of the time-axis direction interpolation signal, and the first Stereoscopic image of Means for selecting a signal for the left image from the image signal delayed by the predetermined period and the vertical interpolation signal for outputting the signal as the left image signal, and at the same time selecting a signal for the right image and outputting as the right image signal. A stereoscopic image signal conversion device comprising: 4. The stereoscopic image signal conversion device according to claim 1, wherein the predetermined period is one field period.