JP3096612B2 - Time-division stereoscopic video signal detection method, time-division stereoscopic video signal detection device, and stereoscopic video display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a time-division stereoscopic video signal detection method, a time-division stereoscopic video signal detection device, and a stereoscopic video display device.

[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, a method for converting a two-dimensional image into a three-dimensional image has already been proposed. Conventional methods for converting a two-dimensional image into a three-dimensional image include the following. That is, 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 frames before the left-eye video is used as the right-eye video. Is the way. In this case, 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.

A video several frames before the left-eye video is obtained by storing the original two-dimensional video in a field memory and reading it out with a delay of a predetermined number of fields. The conventional method described above is referred to as a field delay method.

[0006]

In the above conventional method, when the delay amount of one of the left-eye image and the right-eye image is fixed, the parallax increases as the horizontal movement of the moving object increases. Therefore, the three-dimensional effect is changed, and it becomes difficult to see a three-dimensional image.

[0007] Therefore, in order to obtain a stable three-dimensional effect, the present applicant has made it clear that the faster the moving object moves in the horizontal direction,
It has been devised to reduce the delay amount of one of the left-eye image and the right-eye image with respect to the other. In this way, a relatively new field is presented as a delayed image for an image with fast horizontal movement, and a relatively old field is presented as a delayed image for an image with slow horizontal movement.

[0008] The applicant of the present invention has proposed a three-dimensional image as described above.
A 3D image display device equipped with a 2D / 3D conversion device adopting a method of converting to a 3D image has been developed. In such a stereoscopic video display device, it is conceivable to provide the following three display modes and switch between these display modes so that three types of video can be viewed.

(I) 2D / 3D display mode: input 2
A mode in which a right-eye video signal and a left-eye video signal are generated from a three-dimensional video signal and supplied to a display, thereby displaying a stereoscopic video.

(Ii) 2D display mode: a mode in which an input two-dimensional video signal is displayed on a display as it is.

(Iii) Serial 3D display mode: A time-division three-dimensional video signal in which a right-eye video signal and a left-eye video signal are alternately sent one field at a time is input, and the time-division three-dimensional signal is converted to a right-eye video. A mode for displaying stereoscopic video by separating the signal into a left-eye video signal and supplying it to the display

In the stereoscopic image display device capable of selecting three display modes as described above, when a 2D / 3D display mode or a 2D display mode is selected and a time-division stereoscopic image signal is input. However, there is a problem in that the subject becomes blurred because the subject and the background shake right and left for each field.

It is an object of the present invention to provide a time-division stereoscopic video signal automatic detection method and a time-division stereoscopic video signal automatic detection device capable of automatically detecting a time-division stereoscopic video signal.

According to the present invention, a 2D / 3D display mode for displaying a stereoscopic image by generating a right-eye image and a left-eye image from an input two-dimensional image and supplying the generated image to a display, In a stereoscopic video display device having a serial 3D display mode for displaying a stereoscopic video by separating a stereoscopic video signal into a right-eye video and a left-eye video and supplying the same to a display, the input signal is time-division multiplexed. It is an object of the present invention to provide a stereoscopic video display device that can automatically switch a display mode to a serial 3D display mode when the signal is a stereoscopic video signal.

[0015]

A time-division stereoscopic video signal detection method according to the present invention detects a horizontal motion vector for each field of an input video signal, and detects a horizontal motion vector detected in a predetermined number of past fields. It is characterized in that whether or not the input video signal is a time-division stereoscopic video signal is determined based on the motion vector.

Whether the input video signal is a time-division stereoscopic video signal or not is determined, for example, by changing the direction of the horizontal motion vector detected in a predetermined number of past fields in each field. It is performed based on whether or not there is.

A determination as to whether or not the input video signal is a time-division stereoscopic video signal may be made as follows. In other words, a plurality of regions for detecting a horizontal motion vector are set in advance, and for each region, it is determined whether the direction of the horizontal motion vector is in the opposite direction every field over a predetermined number of past fields. Judge, 1
Determines whether the input video signal is a time-division stereoscopic video signal based on whether or not the ratio of the number of areas determined to be in the opposite direction to the total area for each field is equal to or greater than a predetermined value. I do.

The time-division stereoscopic video signal detecting apparatus according to the present invention comprises a detecting means for detecting a horizontal motion vector for each field of an input video signal, and a horizontal motion vector detected in a predetermined number of past fields. On the basis of the above, there is provided a determining means for determining whether or not the input video signal is a time-division stereoscopic video signal.

The determination means may be, for example, based on whether or not the direction of the horizontal motion vector detected in a predetermined number of fields in the past is in the opposite direction for each field, and A signal that determines whether the signal is a system stereoscopic video signal is used.

When a plurality of regions for detecting a horizontal motion vector are set, the determining means may be, for example, that the direction of the horizontal motion vector is one field over a predetermined number of past fields for each region. Means for judging whether or not each time is in the opposite direction, and 1
Whether or not the input video signal is a time-division stereoscopic video signal based on whether or not the ratio of the number of regions determined to be in the opposite direction for each field to the entire region is equal to or greater than a predetermined value That has means for determining

[0021] A stereoscopic image display apparatus according to the present invention generates a right-eye image and a left-eye image from an input two-dimensional image and supplies the generated two-dimensional image to a display, whereby a 2D / 3D display mode for displaying a stereoscopic image is provided. The input time-division stereoscopic video signal is separated into a right-eye video and a left-eye video and supplied to a display to provide a serial 3D display mode for displaying a stereoscopic video. A horizontal motion vector is detected for each field of the signal, and based on the horizontal motion vectors detected in a predetermined number of past fields, whether the input video signal is a two-dimensional video signal or a time-division stereoscopic video signal Means for determining whether or not the input video signal is a time-division stereoscopic video signal. Characterized in that it comprises a mode setting means for setting the mode.

The determination means includes, for example, a means for detecting a horizontal motion vector for each field of the input video signal, and a method for detecting the direction of a horizontal motion vector detected in a predetermined number of past fields for each field. And a means for determining whether the input video signal is a time-division stereoscopic video signal based on whether the input video signal is in the opposite direction.

When a plurality of areas for detecting a horizontal motion vector are set, the determination means may be, for example, a means for detecting a horizontal motion vector for each field of the input video signal, Means for judging whether or not the direction of the horizontal motion vector is in the opposite direction every field over a predetermined number of past fields; and for the area determined to be in the opposite direction every field. A device having means for determining whether or not the input video signal is a time-division stereoscopic video signal based on whether or not the ratio of the number to the entire area is equal to or greater than a predetermined value is used.

[0024]

In the time-division stereoscopic video signal detecting method or the time-division stereoscopic video signal detecting apparatus according to the present invention, a horizontal motion vector is detected for each field of the input video signal. Then, it is determined whether or not the input video signal is a time-division stereoscopic video signal based on the horizontal motion vectors detected in a predetermined number of past fields.

In the stereoscopic video display apparatus according to the present invention, a horizontal motion vector is detected for each field of the input video signal. It is determined whether the input video signal is a two-dimensional video signal or a time-division stereoscopic video signal based on horizontal motion vectors detected in a predetermined number of past fields. When the input video signal is a time-division stereoscopic video signal, the display mode is serial 3
The D display mode is set.

[0026]

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

[1] Description of 2D / 3D Converter FIG. 1 shows a configuration of a 2D / 3D converter provided in a stereoscopic video display device.

The three-dimensional image display device is provided with the following three display modes as display modes.
Switching between these display modes is usually performed by an operator.

(I) 2D / 3D display mode: input 2
A mode in which a right-eye video signal and a left-eye video signal are generated from a three-dimensional video signal and supplied to a display, thereby displaying a stereoscopic video.

(Ii) 2D display mode: a mode in which an input two-dimensional video signal is displayed on a display as it is.

(Iii) Serial 3D display mode: A time-division stereoscopic video signal in which a right-eye video signal and a left-eye video signal are alternately transmitted one field at a time is input, and the time-division three-dimensional signal is converted to a right-eye video. A mode for displaying stereoscopic video by separating the signal into a left-eye video signal and supplying it to the display

[1-1] Description of Operation in 2D / 3D Display Mode First, the operation of the 2D / 3D conversion device in the 2D / 3D display mode will be described.

In the 2D / 3D display mode, when the two-dimensional video signal a is input to the input terminal 1, the input 2D video signal a
The 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. As shown in FIG. 5, the image area 1 of each field
00, a plurality of motion vector detection areas E _{1 to} E ₁₂ are set. The sizes of the motion vector detection areas E _{1 to} E ₁₂ are the same. Also, each motion vector detection area E ₁
To E _12, as shown in FIG. 6, it is further divided into a plurality of small regions e. As shown in FIG. 7, a plurality of sampling points S and one representative point R are set in each small area e.

Each sun in the small area e in the current field
The video signal level at the pulling point S and the
From the video signal level of the representative point R of the corresponding small area e
(Correlation value at each sampling point)
Detection area E₁~ E₁₂Required for each. And each movement
Vector detection area E₁~ E₁₂Motion vector detection
Between all the small areas in the output area,
The correlation values between sampling points with the same deviation are cumulatively added.
It is. Therefore, each motion vector detection area E ₁~ E₁₂
According to the number of sampling points in one small area e
The number of accumulated correlation values is obtained.

In each of the motion vector detection areas E _{1 to} E ₁₂ , the deviation of the point having the smallest correlation accumulated value, that is, the deviation of the point having the highest correlation is determined by the motion vector detection area E 1.
It is extracted as a motion vector of ₁ to E ₁₂ (movement of the subject).

The field memory 11 is provided for delaying the two-dimensional video signal a for each field 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 (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 signal b and the signal 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 video in the horizontal direction by shifting the phase of the input video 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 motion vector
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.

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.

When the set display mode is the 2D display mode or the 2D / 3D display mode, the CPU 20 determines whether or not the currently input video signal is a time-division stereoscopic video signal. -Division stereoscopic video signal detection processing for the

In this time-division stereoscopic video signal detection processing, the input video signal is a two-dimensional video signal or a time-division stereoscopic video signal based on motion vectors detected in a predetermined number of fields in the past. Is determined. When it is determined that the input video signal is a time-division stereoscopic video signal, the display mode is forcibly switched to the serial 3D display mode, and the currently input video signal is a time-division stereoscopic video signal. The operation / display unit 23 displays that there is. The details of the time-division stereoscopic video signal detection processing will be described later.

In this 2D / 3D conversion device, 2D / 3D
In the display mode, by generating a parallax by generating a left-eye image and a right-eye image by a field delay method, by performing a phase shift on both or one of the generated left-eye image and the right-eye image, The positional relationship between the subject and the reference screen surface is changed.

[1-2] Description of Operation in 2D Display Mode In the 2D display mode, the video signal input to the input terminal 1 is supplied to the video switching circuit 13 by the phase control circuit 14,
15 are distributed. At this time, the phase control amounts of the phase control circuits 14 and 15 are set to zero, so that the output terminals 2 and 3 output images without parallax, that is, two-dimensional image signals.

In the 2D display mode, 2D / 3D
As in the display mode, time-division stereoscopic video signal detection processing is performed. Therefore, even in the 2D display mode, the motion vector of the input video signal is detected by the motion vector detection circuit 16. When it is determined by the time-division stereoscopic video signal detection processing that the input video signal is a time-division stereoscopic video signal, the display mode is forcibly switched to the serial 3D display mode,
The operation / display unit 23 displays that the currently input video signal is a time-division stereoscopic video signal.

[1-3] Description of Operation in Serial 3D Display Mode In the serial 3D display mode, when a time-division stereoscopic video signal is input to the input terminal 1, the time-division stereoscopic video signal is converted to a video switching circuit. 13 is sent. When the video switching circuit 13 is controlled by the CPU 20, the left-eye video signal in the time-division stereoscopic video signal is sent to the output terminal 2 via the phase control circuit 14, and The video signal for the right eye is sent to the output terminal 3 via the phase control circuit 15.

[2] Description of Time-Division Stereoscopic Video Signal Detection Processing Hereinafter, a 2D display mode or a 2D /
A time-division stereoscopic video signal detection process performed when the 3D display mode is selected will be described.

When a time-division stereoscopic video signal is input to the input terminal 1, as shown in FIG.
, A left-eye video signal L and a right-eye video signal R are alternately sent in units of one field. Therefore, the horizontal display position of the subject image and its background image indicated by the hatched circle in FIG. 3 changes from left to right and from right to left for each field as shown in FIG. . Therefore, as shown in FIGS. 3 and 4, in the motion vector detection area including a moving image, the direction of the horizontal motion vector is often opposite for each field.

In the time-division stereoscopic video signal detection processing, the input video signal is determined based on whether or not the direction of the horizontal motion vector detected in a predetermined number of past fields is opposite for each field. Is a time-division stereoscopic video signal.

FIG. 2 shows a procedure of a time-division stereoscopic video signal detection process performed by the CPU 20 for each field when the display mode is the 2D display mode or the 2D / 3D display mode.

The horizontal motion vector in each field detected for each motion vector detection area E _{1 to} E ₁₂ is represented by x
_ij . Here, i is the motion vector detection area E _{1 to} E
₁₂ and i is a number from 1 to 12. Also, j
Indicates a field number. In this example, it is determined whether or not the input video signal in the current field is a time-division stereoscopic video signal based on horizontal motion vectors for the past eight fields including the current field. Therefore, j is a number from (J-7) to J, where J is the field number of the current field.

The variable a _ij is defined as shown by the following equation (1). That is, the variable a _ij is the absolute value of the horizontal motion vector x _ij | when less than 1 "| x _ij
0 "and the absolute value | x of the horizontal motion vector x _ij
It is defined as a variable that becomes “1” when _ij | is 1 or more. That is, the variable a _ij is a variable indicating whether or not the amount of horizontal movement of the video in the area is equal to or more than a predetermined value.

[0058]

(Equation 1)

Further, a variable b _ij is defined as shown by the following equation (2). That is, the variable b _ij becomes “1” when the polarity of the horizontal motion vector x _ij is 0 or positive,
“0” when the polarity of the horizontal motion vector x _ij is negative
Is defined as That is, the variable b _ij is
Whether the direction of the horizontal motion vector x _ij is rightward,
It is a variable indicating whether it is the left direction.

[0060]

(Equation 2)

When the input video signal is a time-division stereoscopic video signal, the variable b _ij alternately repeats “0” and “1” for each field in an area where a _ij is “1”. become. It is extremely rare that such a phenomenon appears continuously in a two-dimensional video signal.

Also, two reference patterns P _{c, k} (c = 2) to which “0” and “1” are alternately assigned for each field.
0 or 1, k = 0 to 7). The relationship between _k in the first reference pattern P _{0, k} and the value of P _{c, k} is represented by the following Expression 3, _{and k} in the second reference pattern P _1, k is:
The relationship between the values of P _{c, k} is shown by the following Equation 4.

[0063]

(Equation 3)

[0064]

(Equation 4)

[0065] In time division stereoscopic video signal detection processing, first, the reference pattern P _c used in this _process, as _k, in order to use different reference pattern as a reference pattern used last, P _{c, k} of c Is updated (step 1). That is, the exclusive OR (XOR) of the previously set c and 1 is calculated, and the result is c. Therefore, if c = 0 (representing the first reference pattern P _{0, k} ), c = 1 (representing the second reference pattern P _{1, k} ) in step 1 and the second reference pattern P _{1, k} is selected. If c = 1 (representing the second reference pattern P _{1, k} ) in the previous time,
c = 0 (representing the first reference pattern P _{0, k} ), and the first
The reference pattern P _{0, k} is selected.

Next, the motion vector detection areas E _{1 to} E ₁₂
Is selected (step 2). Then, for the selected motion vector detection area, the absolute value of the horizontal motion vectors of the past 8 fields is 1
It is determined whether or not the number of fields thus determined is equal to or more than seven fields (step 3).

That is, as shown in the following Expression 5, it is determined whether or not the sum of the variables a _ij for the past eight fields of the selected motion vector detection area is larger than 6.

[0068]

(Equation 5)

If the number of fields whose absolute value is 1 or more in the horizontal motion vectors for the past 8 fields is 6 or less, the evaluation value f for video signal discrimination with respect to the motion vector detection area is obtained. _i is set to "0" (step 10). Here, i is a number indicating the motion vector detection area. Then, it is determined whether or not all the motion vector detection regions have been selected in step 2 (step 6). If not all the motion vector detection regions have been selected in step 2, the process returns to step 2 and is still selected. A motion vector detection area that is not present is selected.

If all the motion vector detection areas are in step 2
If it has been selected, the process proceeds to step 7. The process of step 7 will be described later.

In step 3, if the number of horizontal motion vectors for the past eight fields whose absolute value is 1 or more is 7 or more, the motion vector detection area currently selected is determined. Past 8
The direction of the horizontal motion vector x _{ij for} the field is
Whether or not the direction is opposite in each field is determined as follows.

For the currently selected motion vector detection area, as shown in Expression 6, the pattern represented by the variable b _ij for the past eight fields, the first reference pattern P _{0, k} and the second reference pattern Of the patterns P _{1, k} , the reference pattern P _{c, k} selected in step 1 is compared,
The number of fields d that do not match is obtained (step 4).

In Expression 6, J indicates the current field number. XOR means exclusive OR. Therefore, in Equation 6, for each of the past eight fields _, the value of the reference pattern P _{c, k} and
The exclusive OR of the variable bi _(Jk) is calculated, and the total sum of the exclusive OR calculated for each field is calculated.

[0074]

(Equation 6)

Next, for the currently selected motion vector detection area, the pattern represented by the variable b _ij for the past eight fields is substantially synchronized with the reference pattern P _{c, k} based on the following equation (7). , Whether the pattern is almost opposite to the reference pattern P _{c, k} (anti-synchronous), or not synchronized with the reference pattern P _{c, k} (asynchronous).
Evaluation value f _i for video signal identification corresponding to the determination result is obtained (Step 5).

[0076]

(Equation 7)

That is, when the number d of fields that do not match the reference pattern P _{c, k} is less than 2, the pattern represented by the variable b _ij for the past eight fields is substantially synchronized with the reference pattern P _{c, k.} Is determined, and the value of the evaluation value f _i for video signal determination for the currently selected motion vector detection area is set to “1”.

When the number of fields d that do not match the reference pattern P _{c, k} is more than 6, the pattern represented by the variable b _ij for the past eight fields is
_{c, k} a is determined that the substantially opposite pattern (anti-sync), the value of the video signal identification evaluation value f _i of the motion vector detection area that is currently selected is set to "1".

When the number d of fields that do not match the reference pattern P _{c, k} is 2 or more and 6 or less, the pattern represented by the variable b _ij for the past 8 fields is the same as the reference pattern P _{c, k} . is determined not to be synchronized, the value of the video signal identification evaluation value f _i of the motion vector detection area that is currently selected is "0".

That is, when the pattern represented by the variables b _ij for the past eight fields is a pattern close to a pattern in which 0 and 1 are alternately repeated, the value of the evaluation value f _i for video signal discrimination becomes “ "is, the value of the evaluation value f _i for discriminating video signal otherwise" 1 is 0 ".

Next, it is determined whether all the motion vector detection areas have been selected in step 2 (step 6). If all the motion vector detection areas have not been selected in step 2, the process returns to step 2 to select a motion vector detection area that has not yet been selected, and the processing from step 3 onward is repeated.

In step 6, if all the motion vector detection areas have been selected in step 2, step 7
Move to That is, when the evaluation values f _i for video signal determination have been obtained for all the motion vector detection regions, the result of step 6 is YES, and the process proceeds to step 7.

[0083] In step 7, based on the following equation 8, the number of motion vector detecting areas is a video signal discrimination evaluation value f _i is "1", the ratio for the number M of all of the motion vector detecting area , It is determined whether the value is larger than a predetermined value, and the result of the determination is stored. In this example, the predetermined value is 1
/ 4.

[0084]

(Equation 8)

[0085] The number of motion vector detecting areas is a video signal discrimination evaluation value f _i is "1", the ratio for the number M of all of the motion vector detecting area, when greater than 1/4 time current field J is The determination result that the video signal is a divisional stereoscopic video signal is stored, and when it is 1/4 or less, the determination result that the current field J is not a time-divisional stereoscopic video signal is stored.

Then, it is determined whether or not the result of determination in a predetermined number of past fields including the current field, for example, 30 fields, is a result of a continuous determination as a time-division stereoscopic video signal (step). 8). If the determination result in the past predetermined number of fields is a determination result that the input video signal is a time-division stereoscopic video signal continuously, it is finally determined that the input video signal is a time-division stereoscopic video signal (step 9). In this case, as described above, the display mode is forcibly changed to the serial 3D display mode, and the operation / display unit 23 determines that the currently input video signal is a time-division stereoscopic video signal. Will be displayed.

If the result of determination in the past predetermined number of fields is not a continuous time-division stereoscopic video signal, the input video signal is not determined to be a time-division stereoscopic video signal and the current video signal is not determined to be a time-division stereoscopic video signal. Is terminated.

[0088]

According to the present invention, a time-division stereoscopic video signal can be automatically detected. Further, according to the present invention, a 2D / 3D display mode for displaying a stereoscopic image by generating a right-eye image and a left-eye image from the input 2D image and supplying the generated image to the display, In a stereoscopic video display device equipped with a serial 3D display mode for displaying a stereoscopic video by dividing the stereoscopic video signal into a right-eye video and a left-eye video and supplying the divided video signal to a display, the time when the input signal is When the stereoscopic video signal is divided, the display mode is set to serial 3
The mode can be automatically switched to the D display mode.

[Brief description of the drawings]

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

FIG. 2 is a flowchart illustrating a time-division stereoscopic video signal detection processing procedure performed by a CPU;

FIG. 3 is a schematic diagram showing a change in a motion vector in a horizontal direction of each motion vector detection area when a time-division stereoscopic video signal is input.

FIG. 4 is an enlarged schematic diagram showing a change in a horizontal motion vector of each motion vector detection area with respect to the right-eye video signal R and the left-eye video signal R of FIG. 3;

FIG. 5 is a schematic diagram showing a plurality of motion vector detection areas E _{1 to} E ₁₂ set in a video area of each field.

FIG. 6 is a schematic diagram showing a plurality of small areas e in a motion vector detection area.

FIG. 7 is a schematic diagram showing a plurality of sampling points S set in a small area e and one representative point R.

[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

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yukio Mori 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Akihiro Maenaka 2-5-2 Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. (58) Fields investigated (Int. Cl. ⁷ , DB name) H04N 13/00-15/00

Claims (9)

(57) [Claims] 1. A horizontal motion vector is detected for each field of an input video signal, and based on horizontal motion vectors detected in a predetermined number of past fields,
A time-division stereoscopic video signal detection method for determining whether an input video signal is a time-division stereoscopic video signal. 2. An input video signal is a time-division stereoscopic video signal based on whether or not the direction of a horizontal motion vector detected in a predetermined number of past fields is opposite in each field. The time-division stereoscopic video signal detection method according to claim 1, wherein it is determined whether or not there is a stereoscopic video signal. 3. A plurality of regions for detecting a horizontal motion vector are set, and for each region, the direction of the horizontal motion vector is set to 1 over a predetermined number of past fields.
Determine whether the direction is opposite for each field,
Whether the input video signal is a time-division stereoscopic video signal is determined based on whether the ratio of the number of regions determined to be in the opposite direction for each field to the entire region is equal to or greater than a predetermined value. The time-division stereoscopic video signal detection method according to claim 1, wherein the determination is performed. 4. A detecting means for detecting a horizontal motion vector for each field of an input video signal, and a time division method based on horizontal motion vectors detected in a predetermined number of past fields. A time-division stereoscopic video signal detection device, comprising: a determination unit configured to determine whether the video signal is a stereoscopic video signal. 5. The determining means determines that the direction of a horizontal motion vector detected in a predetermined number of past fields is one.
5. The time-division stereoscopic video signal detecting device according to claim 4, wherein whether or not the input video signal is a time-division stereoscopic video signal is determined based on whether or not the direction is opposite for each field. . 6. A plurality of regions for detecting a horizontal motion vector are set, and the judging means determines that, for each region, the direction of the horizontal motion vector is the opposite direction every one field over a predetermined number of past fields. Means for judging whether or not the input image is input, based on whether or not the ratio of the number of areas determined to be in the opposite direction for each field to the total area is equal to or greater than a predetermined value. 5. The time-division stereoscopic video signal detecting device according to claim 4, further comprising means for determining whether the signal is a time-division stereoscopic video signal. 7. A 2D / 3D display mode for displaying a stereoscopic image by generating a right-eye image and a left-eye image from an input two-dimensional image and supplying the generated image to a display, and a time-division stereoscopic input. By separating the video signal into a right-eye video and a left-eye video and supplying them to the display,
In a stereoscopic video display device having a serial 3D display mode for displaying stereoscopic video, a horizontal motion vector is detected for each field of an input video signal, and a horizontal motion vector detected in a predetermined number of past fields is detected. Determining means for determining whether the input video signal is a two-dimensional video signal or a time-division stereoscopic video signal based on the input video signal; A stereoscopic image display device comprising: mode setting means for setting a 3D display mode. 8. A determining means for detecting a horizontal motion vector for each field of the input video signal, and determining a direction of the horizontal motion vector detected in a predetermined number of past fields for each field. 8. The stereoscopic video display device according to claim 7, further comprising means for determining whether or not the input video signal is a time-division stereoscopic video signal based on whether or not the direction is opposite. 9. A plurality of regions for detecting a horizontal motion vector are set, and the judging unit detects a horizontal motion vector for each field of the input video signal. Means for determining whether or not the direction of the motion vector is in the opposite direction every field over a predetermined number of past fields, and all the number of areas determined to be in the opposite direction every field The stereoscopic video display device according to claim 7, further comprising means for determining whether or not the input video signal is a time-division stereoscopic video signal based on whether or not the ratio of the input video signal is not less than a predetermined value.