JP2002209231A - Stereoscopic video signal generating method, transmission method and transmission/reception method, and its system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology that converts a stereoscopic video signal into a compatible video signal which can be watched as a conventional video image not the stereoscopic video image and that can transmit converted video signal and restore the video signal of the stereoscopic video image. SOLUTION: A sum signal (Ln+Rn) and a difference signal (Ln-Rn) are produced from an L channel video signal (Ln) and an R channel video signal (Rn) and stereoscopic video signals (L1+R1, L1-R1,..., Ln+Rn, Ln-Rn) are generated, where the sum signal and the difference signal are alternately arranged by unit of frame. Otherwise, a signal resulting from multiplying a parameter (k) with the L channel video signal (Ln) or the R channel video signal (Rn) is generated, a sum signal (Ln+kRn) and a difference signal (Ln-kRn) are generated from the generated signal and the L channel video signal (Ln) or the R channel video signal (Rn) and a stereoscopic video signals (L1+kR1, L1-kR1,..., Ln+kRn, Ln-kRn) are generated, where the sum signal and the difference signal are alternately arranged by unit of frame.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for generating and transmitting a stereoscopic video signal, and more particularly, to a first video signal (for example, a left-eye video signal) and a second video signal for generating a stereoscopic video.
The present invention relates to a technology for generating or transmitting a compatible video signal that allows not only a stereoscopic video but also a normal video signal to be viewed from the video signal (for example, a right-eye video signal).

[0002]

2. Description of the Related Art In recent years, there have been many types of video services, and stereoscopic video services have been attempted. As a typical method of the stereoscopic video, a technique of transmitting a video signal for the left eye and a video signal for the right eye, and using special glasses on the receiving side to view the stereoscopic video is known.

[0003]

However, viewing a stereoscopic image requires a special device, which cannot be viewed with a general receiver in many cases. Therefore, for a user who does not have a special device, a video signal in which a normal video can be viewed even with a video signal transmitted for a stereoscopic video has been desired.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a three-dimensional video signal which is compatible with a normal image other than a three-dimensional image. It is an object of the present invention to provide a technology capable of transmitting a video signal.

[0005]

According to a first aspect of the present invention, there is provided a first video signal for generating a stereoscopic video, and a second video signal complementary to the first video signal. A method for generating a video signal of a stereoscopic video using a video signal, comprising: generating a sum signal of the first video signal and the second video signal; Generating a difference signal between the sum signal and the second video signal; and alternately arranging the sum signal and the difference signal to generate a stereoscopic video signal.

According to a second aspect of the present invention, in the first aspect, the step of alternately arranging the sum signal and the difference signal to generate a three-dimensional video signal is performed alternately in frame units. It is a step of arranging.

A third invention for solving the above-mentioned problems is characterized in that, in the first or second invention, when the sum signal or the difference signal is generated, a second video signal is multiplied by a parameter. And

A fourth aspect of the present invention for solving the above-mentioned problems is characterized in that, in the third aspect, the parameters are adaptively changed.

A fifth aspect of the present invention for solving the above-mentioned problems is the invention according to any one of the first to fourth aspects, wherein, when the stereoscopic video signal is an interlace signal, the vertical frequency band of the interlace signal is changed. A sum signal and a difference signal are generated using the first video signal and the second video signal limited to １ ／.

According to a sixth aspect of the invention for solving the above-mentioned problems, in any one of the first to fifth aspects, the orientation of the second video signal is inverted instead of the second video signal. A video signal is used.

According to a seventh aspect of the present invention, there is provided an image processing apparatus comprising: a first video signal for generating a stereoscopic video; and a second video signal complementary to the first video signal. A transmission method for transmitting a signal, the method comprising: generating a sum signal of the first video signal and the second video signal;
Generating a difference signal between the first video signal and the second video signal; and transmitting the sum signal and the difference signal alternately in frame units.

An eighth invention for solving the above-mentioned problem is characterized in that, in the above-mentioned seventh invention, when the sum signal or the difference signal is generated, a second video signal is multiplied by a parameter.

A ninth invention for solving the above-mentioned problems is characterized in that, in the above-mentioned eighth invention, said parameters are adaptively changed.

A tenth invention for solving the above-mentioned problems is characterized in that, in the eighth or ninth invention, the parameter is transmitted separately from the stereoscopic video signal.

An eleventh invention for solving the above-mentioned problems is characterized in that, in the eighth or ninth invention, the parameter is inserted into a blanking signal of the stereoscopic video signal.

According to a first aspect of the invention for solving the above-mentioned problems, in any one of the seventh to eleventh aspects, when the stereoscopic video signal is an interlace signal, the vertical frequency band of the interlace signal is changed. A sum signal and a difference signal are generated using the first video signal and the second video signal limited to １ ／.

A thirteenth invention for solving the above-mentioned problems is the above-mentioned second invention according to any of the seventh to twelfth inventions,
And using a video signal obtained by inverting the orientation of the second video signal instead of the video signal.

According to a fourteenth aspect of the present invention, there is provided a video signal comprising a first video signal for generating a three-dimensional video and a second video signal complementary to the first video signal. A method for transmitting and receiving a video signal, the method comprising: generating a sum signal of the first video signal and the second video signal; and generating a sum signal of the first video signal and the second video signal. Generating a difference signal from the video signal; transmitting the sum signal and the difference signal alternately in frame units; receiving the sum signal and the difference signal; and Restoring the first video signal and the second video signal by adding or subtracting a difference signal.

According to a fifteenth invention for solving the above-mentioned problems, in the fourteenth invention, when the sum signal or the difference signal is generated, the second video signal is multiplied by a parameter. It is characterized in that the level of the video signal is reduced.

According to a sixteenth aspect of the present invention, in the fourteenth aspect, the step of restoring the first video signal and the second video signal includes adding the sum signal and the difference signal. Restoring a first video signal by subtraction or subtraction, and restoring a second video signal multiplied by a parameter by adding or subtracting the sum signal and the difference signal; Restoring the second video signal by making the level of the restored second video signal the same as the level of the restored first video signal.

According to a seventeenth invention for solving the above-mentioned problems, in the fifteenth invention or the fifteenth invention, the parameter is transmitted separately from the stereoscopic video signal.

An eighteenth invention for solving the above-mentioned problems is characterized in that, in any one of the fifteenth to seventeenth inventions, the parameter is adaptively changed.

According to a nineteenth invention for solving the above-mentioned problems, in any one of the fourteenth invention to the eighteenth invention, when the stereoscopic video signal is an interlace signal, the vertical frequency band of the interlace signal is changed. A sum signal and a difference signal are generated using the first video signal and the second video signal limited to １ ／.

A twentieth invention for solving the above-mentioned problems is the invention according to any one of the fourteenth to nineteenth inventions, wherein the orientation of the second video signal is inverted instead of the second video signal. Characterized in that the video signal is used.

A twenty-first invention for solving the above-mentioned problems uses a first video signal for generating a stereoscopic video and a second video signal complementary to the first video signal. ,
A stereoscopic video signal generation device that generates a video signal of a stereoscopic video, wherein a sum signal generation unit that generates a sum signal of the first video signal and the second video signal; A difference signal generating means for generating a difference signal from the second video signal; and a means for generating a stereoscopic video signal by alternately arranging the sum signal and the difference signal in frame units. .

According to a twenty-second invention for solving the above-mentioned problems, in the above-mentioned twenty-first invention, the sum signal generation means comprises a second signal generator.
And a means for generating a sum signal after multiplying the video signal by a parameter.

According to a twenty-third invention for solving the above-mentioned problems, in the twenty-first invention, the difference signal generating means comprises a second signal generator.
And a means for generating a difference signal after multiplying the video signal by a parameter.

A twenty-fourth invention for solving the above-mentioned problems is characterized in that, in the twenty-second or twenty-third invention, there is provided means for adaptively changing the parameter.

According to a twenty-fifth aspect of the present invention for solving the above-mentioned problems, in any one of the twenty-second to twenty-fourth aspects, the apparatus further comprises means for inserting the parameter into a blanking signal of the stereoscopic video signal. I do.

A twenty-sixth invention for solving the above-mentioned problems is characterized in that in any one of the above-mentioned twenty-first to twenty-fifth inventions, there is provided means for limiting a vertical frequency band of an interlace signal to １ ／. .

According to a twenty-seventh aspect of the present invention for solving the above-mentioned problems, in any one of the twenty-first to twenty-sixth aspects, there is provided means for generating a video signal in which the orientation of the second video signal is inverted. Features.

A twenty-eighth invention for solving the above-mentioned problem uses a first video signal for generating a stereoscopic video and a second video signal complementary to the first video signal. ,
A video signal transmission / reception system for transmitting and receiving a video signal of a stereoscopic video, wherein a sum signal generation unit configured to generate a sum signal of the first video signal and the second video signal;
Difference signal generating means for generating a difference signal between the video signal and the second video signal, transmitting means for alternately transmitting the sum signal and the difference signal in frame units, and transmission by the transmitting means. Receiving means for receiving the received signal, means for restoring the first video signal by adding the sum signal and the difference signal received by the receiving means, and the sum signal and the difference signal received by the receiving means. Means for restoring the second video signal by subtracting

A twenty-ninth invention for solving the above-mentioned problems is characterized in that, in the twenty-eighth invention, there is provided means for multiplying the second video signal by a parameter.

A thirtieth invention for solving the above-mentioned problems is characterized in that in the above-mentioned twenty-ninth invention, there is provided means for adaptively changing said parameters.

A thirty-first invention for solving the above-mentioned problems is characterized in that in the above-mentioned twenty-ninth or thirtieth invention, there is provided means for transmitting the parameter separately from the stereoscopic video signal.

A thirty-second invention for solving the above-mentioned problems is characterized in that in any one of the twenty-eighth to thirty-first inventions, there is provided means for inserting the parameter into a blanking signal of the stereoscopic video signal. .

A thirty-third invention for solving the above-mentioned problems is characterized in that in any one of the twenty-eighth to thirty-second inventions, there is provided means for limiting a vertical frequency band of an interlace signal to １ ／. .

A thirty-fourth aspect of the present invention for solving the above-mentioned problems is characterized in that in any one of the twenty-eighth to thirty-third aspects, there is provided means for generating a video signal in which the orientation of the second video signal is inverted. Features.

[0039]

Embodiments of the present invention will be described.

In the description of the present invention, a compatible video signal that can be viewed by a receiver that does not support a stereoscopic video signal as well as a receiver that supports a stereoscopic video signal will be described below. It is simply called a compatible video signal. In the description of the embodiment of the present invention, the compatible video signal is
A case will be described in which the present invention is applied to a transmission method for transmitting 60 frames per second, for example, a transmission method such as 480p / 60.

The stereoscopic video signal is composed of a left-eye (L) video signal and a right-eye (R) video signal complementary to the L-video signal. The compatible video signal of the present invention generates a sum signal and a difference signal of a video signal of one frame of the video signal for L and a video signal of one frame of the video signal for R, and the sum signal is converted into a video of one frame. And the difference signal is alternately transmitted as a video signal of one frame.

The above compatible video signal is converted to 480p / 6
When applied to a transmission method of transmitting 60 frames per second, such as 0, 60 frames of a sum signal and a difference signal are transmitted per second.

However, since the sum signal and the difference signal are generated from the L video signal and the R video signal of the same frame, the three-dimensional video signal needs to be the same video signal for two frames. Occurs.

Therefore, the original stereoscopic video signal having a signal format of half the frame number of the signal format to which the compatible video signal is applied is used, and the number of frames is doubled so that the same frame is continued. The number of frames should be the same as that of the compatible video signal system. For example, if the compatible video signal is 48
In the case of the 0p / 60 system, a 480p / 60 system is used as an original stereoscopic video signal, in which the number of frames is doubled so that the same frame is continued and the number of frames is doubled so that the same number of frames is used. Signal format.

Hereinafter, a specific description will be given with reference to the drawings. FIG. 1 is a diagram for explaining a video signal according to the present embodiment.

[0046] In FIG. 1, _{L n} represents an L video signal in units of frames, _{R n} represents an R video signal in units of frames,
Those having the same numeral as a subscript are the same video signal.

The L video signal and the R video signal used for the compatible video signal are L ₁ , L ₁ , L ₂ , L ₂ , L ₃ , L ₃ ... R ₁ , R
₁ , R ₂ , R ₂ , R ₃ , R ₃ ... Then, a sum signal and a difference signal are generated from the L video signal and the R video signal, and the sum signal and the difference signal are alternately arranged to generate a compatible video signal.

The first inputted L video signals _{(L 1)} to the sum by adding the R video signal _{(R 1)} signal _(L 1 _{+ R} 1)
Generate Next, the R video signal (R ₁ ) is subtracted from the input L video signal (L ₁ ) to obtain a difference signal (L ₁ −R ₁ ).
Generate Thereafter, a sum signal and a difference signal are similarly generated. That is, the generated sum signal is L ₁ + R ₁ , L ₂ +
R ₂ , L ₃ + R ₃ ..., And the difference signal is L ₁ −R ₁ ,
L ₂ -R ₂ , L ₃ -R ₃ ...

A video signal is generated by alternately arranging the sum signal and the difference signal generated as described above in frame units.
That is, the compatible video signals generated from the sum signal and the difference signal are L ₁ + R ₁ , L ₁ -R ₁ , L ₂ + R ₂ , L ₂ -R
₂ , L ₃ + R ₃ , L ₃ −R ₃ .

The compatible video signal generated in this way can be transmitted as a normal video signal. Also, according to the transmitted compatible video signal, the video can be viewed as a normal video signal, not as a stereoscopic video signal.

Next, the L video signal and the R video signal are converted from the compatible video signal.
A method for restoring the video signal for use will be described.

A method of restoring the L video signal will be described.

The sum signal and difference transmitted as compatible video signals
Addition to the signal and the signal obtained by this addition
The image signal for L is restored by dividing 2. That is, (L
₁+ R₁+ L₁-R₁) ÷ 2 is calculated and L₁Signal
And restore L ₂, L₃Restore ...
You.

A method for restoring the R video signal will be described.

The R video signal is restored by subtracting the difference signal from the sum signal transmitted as the compatible video signal and dividing the signal obtained by the subtraction by two. That is,
(L ₁ + R ₁ − (L ₁ −R ₁ )) ÷ 2 is calculated and R
_One signal is restored, and thereafter, R ₂ , R _3, ... Are restored in the same manner.

An apparatus for implementing the above method will be described.

FIG. 2 is a block diagram of a stereoscopic video signal generating apparatus A for generating a compatible video signal.

In FIG. 2, reference numeral 11 denotes a subtraction unit. Subtraction unit 1
Reference numeral 1 is a signal for subtracting the R video signal from the input L video signal to generate a difference signal. For example, the input video signal for L in frame unit is L _n , and the video signal for R is R
_n , the difference signal generated by the subtractor 11 is L _n −
The R _n.

Reference numeral 12 denotes an adding unit. The addition unit 12 adds the input L video signal and the R video signal to generate a sum signal. For example, the input frame unit L
When the video signal for use is L _n and the video signal for R is R _n , the sum signal generated by the adder 12 is L _n + R _n .

Reference numeral 13 denotes a stereoscopic video signal generation unit. The stereoscopic video signal generation unit 13 alternately arranges the sum signal generated by the addition unit 12 and the difference signal generated by the subtraction unit 11 in frame units.

Reference numeral 14 denotes a transmitting unit. The transmission unit 14 transmits the sum signal and the difference signal from the stereoscopic video signal generation unit 13. FIG. 3 is a block diagram of a stereoscopic video signal restoring device B for restoring a compatible video signal. FIG. 4 is a diagram for explaining the operation of the MEMs 25 and 28.

In FIG. 3, reference numeral 21 denotes a receiving unit. Receiver 2
1 receives the compatible video signal transmitted by the transmission unit 14,
The received compatible video signal is converted into a delay unit 22 and an adder 2 described later.
3 and the subtraction unit 26.

Reference numeral 22 denotes a delay unit. The delay unit 22 delays the received sum signal by one frame and sets a timing with a difference signal that is input later.

Reference numeral 23 denotes an adder. The adder 23 adds the difference signal to the sum signal timed by the delay unit 22. For example, if the sum signal is _L n + _{R n,} a difference signal between _L n -R _n, signal produced by the adder 23 becomes 2L _n.

Reference numeral 24 denotes a division unit. The divider 24 divides the signal generated by the adder 23 by 2 to restore the L video signal.

Reference numeral 25 denotes a MEM (storage device for L video signal). As shown in FIG. 4, the MEM 25 stores the L video signal restored by the divider 24 at the timing of two frames, and stores the stored L video signal twice in succession at the timing of one frame. Is output.

Reference numeral 26 denotes a subtraction unit. The subtraction unit 26
The difference signal is subtracted from the sum signal timed by the extension 22.
Is to be calculated. For example, if the sum signal is L_n+ R_nDifference signal
To L _n-R_n, The signal generated by the subtractor 26
Is 2R_nBecomes

Reference numeral 27 denotes a division unit. The divider 27 divides the signal generated by the subtractor 26 by 2 to generate an R video signal.

Reference numeral 28 denotes a MEM (storage device for R video signal). As shown in FIG. 4, the MEM 28 stores the R video signal restored by the divider 27 at the timing of two frames, and continuously stores the stored R video signal twice at the timing of one frame. Is output.

Next, the operation of the above configuration will be described.

FIG. 5 is a flowchart for explaining the operation of the three-dimensional video signal generating device A and the three-dimensional video signal restoring device B.

First, the same L video signal is input to the stereoscopic video signal generation device twice consecutively in frame units, and thereafter the same L video signal is similarly input to the frame. It is input to the three-dimensional video signal generation device A twice in succession. On the other hand, the R video signal input to the stereoscopic video signal generation device A is at the same timing as the L video signal is input to the stereoscopic video signal generation device,
In addition, the same R video signal is input twice consecutively in frame units, and thereafter, the same R video signal is input twice consecutively in frame units. For example, if the L video signal in frame units is L _n , the R video signal in frame units is R _n, and those with the same number as the suffix are the same video signal, the stereoscopic video signal The L video signal and the R video signal input to the generation device A are L
_{1, L 1, L 2,} L 2, L 3, L 3 ··· R 1, R 1,
R ₂ , R ₂ , R ₃ , R ₃ ...

The adder 12 generates a sum signal by adding the R video signal and the input L video signal simultaneously, and transmits the sum signal to the stereoscopic video signal generator 13. For example, if the L video signals of the first frame and the _{L 1,} the sum signal generated by the adding section 12 _{is L 1 + R 1 (Step101)} .

The subtraction unit 11 generates a difference signal by subtracting the simultaneously input R video signal from the L video signal, and transmits the difference signal to the stereoscopic video signal generation unit 13. For example,
When the L video signal input at the same time as the R video signal (R ₁ ) is L ₁ , the difference signal generated by the subtractor 11 is
It is L ₁ -R ₁ (Step 102).

The three-dimensional video signal generator 13 alternately arranges the sum signal generated by the adder 12 and the difference signal generated by the subtractor 11. That is, the sum signal generated by the adding unit 12 and the difference signal generated by the subtracting unit 11 are L ₁ +
R ₁ , L ₁ -R ₁ ... Are arranged in this order (Step 10
3).

The transmitting section 14 transmits the difference signal and the sum signal arranged by the stereoscopic video signal generating section 13 to the receiving section 21 as a compatible video signal (Step 104).

The receiving section 21 receives the compatible video signal and transmits the received compatible video signal to the delay section 22 (Step
105).

The delay unit 22 delays the sum signal until a difference signal input next to the sum signal is input (Step 1).
06).

When the difference signal between the compatible video signals is input to the stereoscopic video signal restoration device A, the adder 23 generates a signal that is delayed by the delay unit 22 and that adds the difference signal to the sum signal. For example, when the sum signal is L ₁ + R ₁ and the difference signal is L ₁ −R ₁ , the adder 23 calculates (L ₁ + R ₁ ) + (L ₁ −R
₁ ) is performed to generate a 2L ₁ signal (St)
ep107).

The division unit 24 restores the L video signal by dividing the signal generated by the addition unit 23 by two. That is,
The divider 24 calculates 2L ₁ ÷ 2 and restores the L ₁ L video signal. Then, the restored L video signal is transmitted to the MEM 25 (Step 108).

As shown in FIG. 4, the MEM 25 stores the L video signal restored by the divider 24 at a timing corresponding to two frames, and continuously stores the stored L signal twice in units of one frame. Output (Step 109).

On the other hand, the subtraction section 26 generates a signal obtained by subtracting the difference signal from the sum signal delayed by the delay section 22. That is, in the subtraction unit 26, (L ₁ + R ₁ ) − (L ₁ −
R ₁ ) is calculated to generate a 2R ₁ signal (St)
ep110).

The dividing section 27 restores the R video signal by dividing 2 by the signal generated by the subtracting section 26. That is, the divider 27 calculates 2R ₁ ÷ 2 and restores the R video signal of R ₁ . Then, the restored R video signal is transmitted to the MEM 28 (Step 111).

As shown in FIG. 4, the MEM 28 stores the R video signal restored by the divider 27 at the timing of two frames, and outputs the stored R signal twice in units of one frame ( Step 112).

The compatible video signal thus generated can be transmitted as a normal video signal and viewed.

In the first embodiment, a case has been described in which a sum signal and a difference signal of an L video signal and an R video signal are simply generated and transmitted alternately. .

However, in the case of a stereoscopic video signal, a left-eye video (L video signal) and a right-eye video (L video signal) can be used depending on whether the same subject is photographed at a distance (distant view) or near (close-up). (R video signal). That is, the difference between the L video signal and the R video signal is small in distant view shooting, and the difference between the L video signal and the R video signal is large in close-up shooting.

Therefore, the second embodiment is characterized in that parameters are used so that even if the difference between the L video signal and the R video signal is large, the viewer can enjoy watching. The details will be described below.

When there is a remarkable difference between the L video signal and the R video signal, it is usual to simply add or subtract the L video signal and the R video signal to generate a sum signal and a difference signal. However, in a receiver that can only use the video signal of, the video signal for L and the video signal for R interfere with each other, and it is uncomfortable to watch as a normal video (not a stereoscopic video).

Therefore, it is necessary to reduce the R video signal to a level at which it is difficult for a human to identify. That is, the parameter k (0 <k) is set to the R video signal so that interference between the L video signal and the R video signal is reduced and the video can be viewed as a normal video.
<1) is applied to lower the level of the R video signal.

Hereinafter, a method of generating a compatible video signal will be specifically described.

FIG. 6 is a diagram for explaining a video signal according to the present embodiment.

[0093] the first inputted R video signal _{(R 1)} Parameters (k: 0 <k <1 ) is multiplied by. And L
A video signal for L (kR ₁ ) obtained by multiplying the video signal for L (L ₁ ) by a parameter is added to generate a sum signal. Furthermore, to the next input image and an R image signal _{(R 1)} Parameters (k:
0 <k <1) and subtract the R video signal (kR ₁ ) multiplied by the parameter from the L video signal (L ₁ ) to generate a difference signal.

The sum signal and the difference signal generated as described above are alternately arranged in frame units to generate a compatible video signal.

That is, as shown in FIG.
The sum signal is L₁+ KR₁, L₂+ KR ₂, L₃+ KR₃・
.. and the difference signal is L₁-KR₁, L₂-KR₂, L
₃-KR₃... And the sum signal and the difference signal
The compatible video signal generated from the₁+ KR₁, L₁-K
R₁, L₂+ KR₂, L₂-KR₂, L₃+ KR₃, L
₃-KR₃... Note that the R video signal has no parameters.
Data k, but multiply the video signal for L by the parameter
You may. In addition, the compatible video signal is added to the difference signal next to the sum signal.
Is explained, but the sum signal is added next to the difference signal.
It may be arranged.

As a method of transmitting the parameter k, it is conceivable to insert the parameter k into the blanking signal of the generated sum signal or difference signal.

Further, in order to reduce the L video signal or the L video signal to a level at which it is difficult for a receiver to receive only normal video signals, it is preferable to set the value of k to about 0.1.

Further, it is not necessary to set the parameter to a constant value, and the parameter may be adaptively changed depending on the difference between the R video signal or the L video signal. For example, the difference between the left-eye image and the right-eye image is greater between close-up shooting and distant shooting of the same subject in close-up shooting. To reduce the value of k. On the other hand, in the case of distant view shooting, the value of k is increased because the difference between the left-eye image and the right-eye image is not so large.

Next, a method of restoring the transmitted compatible video signal will be described.

As a method of restoring, (A) a method of transmitting a parameter k using a compatible video signal and a method of restoring using this parameter k, and (B) a method of transmitting no parameter k using a compatible video signal.
There is a method of restoring the R video signal by restoring the L video signal and comparing the level of the L video signal with the level of the R video signal still multiplied by the parameter k.

(A) The parameter k is determined by the compatible video signal.
And a method for restoring the R video signal using the parameter k will be described.

A method of restoring the L video signal will be described.

The sum signal and the difference signal transmitted as compatible video signals are added, and the signal obtained by the addition is divided by 2 to restore the L video signal. That is, (L
₁ + kR ₁ + L ₁ -kR ₁ ) ÷ 2 is calculated and the L ₁ signal is restored. Thereafter, L ₂ , L ₃ ... Are restored in the same manner.

A method for restoring the R video signal will be described.

From the sum signal transmitted as the compatible video signal
The difference signal is subtracted, and the signal obtained by the subtraction is 2k
To restore the R video signal. That is,
(L ₁+ KR₁− (L₁-KR₁)) Calculate 2k
Yes, R₁The signal is restored, and R₂, R₃・
・ Restore.

(B) The L video signal is restored without transmitting the parameter k, and the level of the L video signal is compared with the level of the R video signal still multiplied by the parameter k, thereby obtaining the R video signal. A method for restoring the video signal for use will be described.

The level of the L video signal and the level of the R video signal used in the same frame tend to be the same, and a sum signal and a difference signal are obtained from the L video signal and the R video signal having the same level. , The level of the video signal for L and the level of R
By making the level of the R video signal the same as that of the R video signal, the R video signal can be restored.

Hereinafter, the restoration method will be specifically described.

A method for restoring the L video signal will be described.

The sum signal and the difference signal transmitted as the stereoscopic video signal are added, and the signal obtained by the addition is divided by 2 to restore the L video signal. That is, (L ₁ + kR ₁ + L ₁ -kR ₁ ) ÷ 2 is calculated to restore the L ₁ signal, and thereafter, L ₂ , L _3.
・ Restore.

A method for restoring the R video signal will be described.

As described above, since the level of the video signal for L and the level of the video signal for R tend to be the same,
After restoring the L video signal, the level of the L video signal is compared with the level of the R video signal multiplied by the parameter, and the levels of both video signals are matched to restore the R video signal. That is, the difference signal (L ₁ -kR ₁ ) is subtracted from the sum signal (L ₁ + kR ₁ ) transmitted as the compatible video signal to generate a signal of 2 kR ₁ (0 <2 kR ₁ <1). The level of this signal (2 kR ₁ ) and the restored video signal for L ((L ₁ + kR ₁ + L ₁ -kR ₁ ) ÷ 2 = L ₁ )
And the level of the 2kR ₁ signal is matched with the level of the restored L video signal (L ₁ ) to restore the R video signal.

Next, an apparatus for realizing the method described in the second embodiment will be described. It is to be noted that the same components as those of the device for realizing the method described in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

First, the generator will be described.

FIG. 7 is a block diagram of a stereoscopic video signal generator C for generating a compatible video signal.

In FIG. 7, reference numeral 31 denotes a multiplier. Multiplication unit 31
Multiplies the input R video signal in frame units by a parameter to generate a signal that is a source of a difference signal and a sum signal. For example, when the input R video in frame units is R _n and the parameter is k (0 <k <1), the signal generated by the multiplication unit 31 is k × R _n = kR _n .

An operation in the above configuration will be described.

First, the L video signal and the R video signal input to the stereoscopic video signal generation device C are the same as the L video signal and the R video signal described in the first embodiment.

The multiplication unit 31 multiplies the input R video signal by a parameter, and transmits a signal obtained by multiplying the parameter to the addition unit 12. For example, if the parameter is k (0 <k
<1), when the first video signal R was _{R 1,} k × R
₁ = kR ₁ signal is generated. Then, the addition unit 12 adds the signal generated by the multiplication unit 31 to the L video signal input simultaneously with the R video signal to generate a sum signal,
The sum signal is transmitted to the stereoscopic video signal generation unit 13. For example, when the signal L for L is a _first frame unit, the sum signal generated by the adder 12 is L ₁ + kR ₁ .
The multiplying unit 31 generates a signal obtained by multiplying the second R video signal input next to the first R video signal by a parameter, and transmits this signal to the subtraction unit 11. For example, the second
If the video signal is a R _1, a signal generated by the multiplier unit 31 is kR _1. Further, the subtraction unit 11 generates a difference signal obtained by subtracting the signal generated by the multiplication unit 31 from the L video signal input simultaneously with the R video signal, and transmits the difference signal to the stereoscopic video signal generation unit 13. I do. For example, a video signal _{(R 1)} at the same time the input video signal L for R _{L 1}
, The difference signal generated by the subtraction unit 11 is L ₁ −
It is kR _1. The stereoscopic video signal generation unit 13 includes the addition unit 12
And the difference signal generated by the subtractor 11 are alternately arranged. That is, the sum signal generated by the addition unit 12 and the difference signal generated by the subtraction unit 11 are represented by L ₁ + k
R ₁ , L ₁ -kR ₁ are arranged in this order. Finally, the transmission unit 14 transmits the sum signal and the difference signal arranged by the stereoscopic video signal generation unit 13 to the reception unit 21.

A description will now be given of a compatible video signal restoring device. (C) A device that transmits a parameter k using a compatible video signal and performs recovery using this parameter k. (D) A device that does not transmit a parameter k using a compatible video signal.
There is a device for restoring the L video signal by restoring the L video signal and comparing the level of the L video signal with the level of the R video signal still multiplied by the parameter k.

The devices (C) and (D) will be described below.

(C) The parameter k is determined by the compatible video signal.
Will be described using the parameter k.

FIG. 8 is a block diagram of a stereoscopic video signal restoring device D for restoring a compatible video signal.

In FIG. 8, reference numeral 47 denotes a division unit. Division unit 47
Divides the signal generated by the subtractor 26 by 2k to restore the R video signal.

An operation in the above configuration will be described.

FIG. 9 is a flow chart for explaining the operation of the three-dimensional video signal restoring device D.

Receiving section 21 receives the compatible video signal transmitted by transmitting section 14 and converts the received compatible video signal to delay section 2.
2 (Step 201).

The delay unit 22 delays the sum signal until a difference signal input next to the sum signal is input (Step 2).
02).

When the difference signal, which is a video signal, is input to the stereoscopic video signal restoration device D, the adder 23 generates a signal that is delayed by the delay unit 22 and that adds the difference signal to the sum signal. For example, let the sum signal be L ₁ + kR ₁ and the difference signal be L ₁ -kR
_When it is set to ₁ , the adding unit 23 calculates (L ₁ + kR ₁ ) + (L
₁₋ kR ₁ ) is calculated, and a signal of 2L ₁ is generated (Step 203).

The dividing section 24 restores the L video signal by dividing 2 by the signal generated by the adding section 23. That is,
The divider 24 calculates 2L ₁ ÷ 2 and restores the L ₁ L video signal. Then, the restored L video signal is transmitted to the MEM 25 (Step 204).

[0131] The MEM 25 calculates the L
The video signal for use is stored at a timing corresponding to two frames, and the stored L signal is output twice consecutively in units of one frame (Step 205).

On the other hand, the subtraction unit 26 generates a signal obtained by subtracting the difference signal from the sum signal delayed by the delay unit 22. That is, in the subtraction unit 26, (L ₁ + kR ₁ )-(L ₁ -k
R ₁ ) is calculated to generate a 2 kR ₁ signal (S 1
step 206).

The divider 47 restores the R video signal by dividing the signal generated by the subtractor 26 by 2k. That is, the division unit 47 calculates 2kR ₁ ÷ 2k, and calculates R
₁ R video signal is restored. And this restored R
Is transmitted to the MEM 28 (Step 20).
7).

The MEM 28 calculates the R restored by the divider 47
Video signal for two frames, and outputs the stored R signal twice in units of one frame (S
step208).

The parameter k does not need to be a fixed value, but may be changed adaptively depending on the stereoscopic image. Further, in the above-described embodiment, the R video signal is used as the signal for multiplying the parameter, but the L video signal may be multiplied by the parameter.

(D) The parameter k is not transmitted by the compatible video signal, the video signal for L is restored, and the level of the video signal for L is compared with the level of the video signal for R with the parameter k multiplied. The following describes an apparatus for restoring the R video signal.

FIG. 10 is a block diagram of a stereoscopic video signal restoring device E for restoring a compatible video signal. FIG. 11 shows the comparison unit 5
7 is a diagram for explaining the operation of FIG.

In FIG. 10, reference numeral 57 denotes a comparison unit. As shown in FIG. 11, the comparison unit 57 outputs the L
The level of the video signal for use is compared with the level of the signal generated by the subtraction unit 26, and the level of the signal generated by the subtraction unit 26 is matched with the level of the restored L video signal to convert the R signal. Restore.

The operation of the above configuration will be described.

Receiving section 21 receives the compatible video signal transmitted by transmitting section 14 and transmits a sum signal of the received compatible video signals to delay section 22, which is input next to the sum signal. The sum signal is delayed until a difference signal is input. When the difference signal is input to the stereoscopic video signal restoration device E, the adding unit 23 generates a signal that is delayed by the delay unit 22 and that adds the sum signal and the difference signal. For example, if the sum signal is L
_{When 1} + kR ₁ is used and the difference signal is L ₁ −kR ₁ , the adder 23 calculates (L ₁ + kR ₁ ) + (L ₁ −kR ₁ ) and generates a 2L ₁ signal. Further, the division unit 24 divides the signal generated by the addition unit 23 by 2 to obtain L
The video signal for use. For example, when the signal generated by the adding unit 23 is 2L ₁ , the dividing unit 24 outputs 2L ₁ ÷
For 2 calculations, to restore the L video signals of L _1. The restored L video signal is transmitted to the MEM 25, and the MEM 2
5 stores the L video signal restored by the division unit 24 at a timing corresponding to two frames, and stores the stored L signal at 1
Output twice consecutively in frame units.

On the other hand, the subtraction section 26 generates a signal obtained by subtracting the difference signal from the sum signal delayed by the delay section 22. That is, in the subtraction unit 26, (L ₁ + kR ₁ )-(L ₁ -k
R ₁ ) is calculated to generate a 2 kR ₁ signal. Then, in the comparing section 57, as shown in FIG.
4 is compared with the level of the signal generated by the subtraction unit 26, and the level of the signal generated by the subtraction unit 26 is matched with the level of the L video signal, thereby obtaining the image signal for R. Restore video signal. Further, the MEM 28 stores the R video signal restored by the divider 27 at a timing corresponding to two frames, and outputs the stored R signal twice in units of one frame.

Although the first and second embodiments have been described on the premise of a transmission system such as 480p / 60, the present invention can also be realized by a transmission system of 480i / 60, for example.

Next, a third embodiment will be described.

In the first and second embodiments, the L video signal and the R video signal of the same frame which are continuous in the same manner as in the progressive scanning system represented by the 480p / 60 system are used.

However, in the interlace system represented by the 480i / 60 system, for example, the line positions of the first field and the second field of the L video signal are different (similarly, the line position of the R video signal is the same). 1st field and 2nd
If the sum signal and the difference signal are simply generated from the L video signal and the R video signal, the L video signal and the difference signal are generated on the side receiving the sum signal and the difference signal. The R video signal cannot be restored.

Therefore, it is necessary to make the line positions of the first field and the second field the same. As one method for making the line positions of the first field and the second field the same, for example, 480i /
The vertical frequency band of the video signal for L in the 60 system is 1 /
There is a way to limit to two. L of this 480i / 60 system
The vertical frequency band of the video signal for
Using the first and second fields of the L / L video signal in the p / 60 format and the first and second fields of the R / L video signal processed in the same manner, the first field is used. A compatible video signal is generated in the same manner as in the embodiment and the second embodiment.

An apparatus for realizing the method described in the third embodiment will be described below.

FIG. 12 is a block diagram of the frequency limiting device.

In FIG. 12, reference numeral 61 denotes a frequency limiting device. The frequency limiting device 61 limits the vertical frequency band of the L video signal and the R video signal to １ ／.
For example, by limiting the vertical frequency band of the L video signal of the 480i / 60 system to １ ／, 240p / 6
A 0-system video signal for L is generated. Thus, the line positions of the first field and the second field of the L video signal can be made the same.

The operation of the above configuration will be described.

The first field of the video signal for L (interlace) is input to the frequency limiting device 61, and the vertical frequency band is limited to １ ／. Further, the second field of the video signal for L is input to the frequency limiting device 61, and the vertical frequency band is limited to １ ／. As a result, the first video signal for L
The line positions of the field and the second field are made the same.

Similarly, the first field of the R video signal (interlace) is input to the frequency limiting device 61, and the vertical frequency band is limited to １ ／. Further, the second field of the R video signal is input to the frequency limiting device 61, and the vertical frequency band is limited to １ ／. Thus, the line positions of the first field and the second field of the R video signal are made the same.

As described above, when the line positions are the same, the first and second fields of the L video signal and the first and second fields of the R video signal are input to the three-dimensional video signal generators A and C. Thereafter, a compatible video signal is generated by the same operation as in the first embodiment and the second embodiment.

The compatible video signal thus generated can be transmitted as a normal video signal and viewed.

The fourth embodiment will be described.

First, generation of a stereoscopic video signal will be described.

In the first and second embodiments, before input to the three-dimensional video signal generators A and C, L
The case where no special processing is performed on the video signal for R and the video signal for R has been described.

However, before inputting to the three-dimensional video signal generators A and C, no special processing is performed on the R video signal.
When the compatible video signal is generated, if the compatible video signal is viewed as a normal video signal, the influence of the R video signal remains to some extent.

Therefore, in the fourth embodiment, in order to further reduce the influence of the R video signal, the characteristic that the amount of video information is concentrated in the low frequency region and the high frequency region are visually perceived. Utilizes difficult characteristics. Specifically, it is characterized in that the orientation of the frequency component of the R video signal is inverted. Here, the reversal of the orientation refers to increasing the low component and increasing the low component of the horizontal frequency of the R video signal on the frequency axis.

Or, in other words, reversing the orientation means converting the horizontal frequency of the video signal for R into a virtual image relationship with the horizontal frequency.

Or, in other words, reversing the orientation means reversing the horizontal frequency line-symmetrically with the center frequency of the horizontal frequency as the central axis on the vertical-horizontal frequency coordinate plane. The details will be described below.

First, generation of a stereoscopic video signal will be described.

FIG. 13 is a diagram for explaining the orientation reversal.

The R video signal is converted to a stereoscopic video signal generator A,
Before input to C, for example, as shown in FIG. 13, the high frequency component and the low frequency component in the horizontal direction are inverted by inverting the orientation of the frequency component of the R video signal. For example, the inversion process of the orientation of the frequency component in the R video signal can be realized by a complex conversion filter. The R video signal with this orientation inverted is used as a new R video signal to generate a stereoscopic video signal. By inverting the orientation of the horizontal frequency component of the R video signal before being input to the stereoscopic video signal generation devices A and C in this manner,
In the case of viewing as a normal video, it is possible to view without discomfort more than in the first embodiment or the second embodiment. The details will be described below.

FIG. 14 is a block diagram of the orientation reversing device.

In FIG. 14, reference numeral 71 denotes an orientation inversion device (for example,
Complex conversion filter). The orientation inversion device 71 inverts the high frequency component and the low frequency component in the horizontal direction in the R video signal.

The operation of the above configuration will be described.

The R video signal is input to the orientation inverting device 71, and the video signal generated by inverting the horizontal high frequency component and the low frequency component of the R video signal is converted into a new R signal.
Video signal. Then, the new R video signal and L video signal are input to the stereoscopic video signal generators A and C, and thereafter, the compatible video signal is obtained by the same operation as in the first and second embodiments. Generate

Next, a method of restoring a compatible video signal generated by the first embodiment will be described.

A method of restoring the L video signal will be described.

The sum signal and difference transmitted as compatible video signals
Addition to the signal and the signal obtained by this addition
The image signal for L is restored by dividing 2. That is, (L
₁+ R₁+ L₁-R₁) ÷ 2 is calculated and L₁Signal
And restore L ₂, L₃Restore ...
You.

A method for restoring the R video signal will be described.

From the sum signal transmitted as the compatible video signal
Subtract the difference signal and add the video signal obtained by this subtraction.
2 divided by the horizontal high frequency component of this video signal.
Inverts low frequency components to restore R video signal
You. After that, R₂, R ₃... is restored.

An apparatus for implementing the above method will be described.

FIG. 15 is a block diagram of the stereoscopic video signal restoring device F. It is to be noted that the same reference numerals are given to devices having the same configuration as the device that realizes the method described in the first embodiment, and detailed description is omitted.

In FIG. 15, reference numeral 89 denotes an inverting unit (for example, a complex conversion filter). The inverting unit 89 inverts the high frequency component and the low frequency component of the video signal from the rejecting unit 27 in the horizontal direction to restore the R video signal.

Next, the operation of the above configuration will be described.

The receiving section 21 receives the compatible video signal from the stereoscopic video signal generating apparatus A and transmits the received compatible video signal to the delay section 22. The delay section 22 is input next to the sum signal. The sum signal is delayed until the difference signal is input.
When the difference signal between the compatible video signals is input to the stereoscopic video signal restoration device F, the adding unit 23 generates a signal that is delayed by the delay unit 22 and that adds the difference signal to the sum signal. For example, when the sum signal is L ₁ + R ₁ and the difference signal is L ₁ −R ₁ , the adding unit 23 calculates (L ₁ + R ₁ ) + (L ₁ −
R ₁ ) is calculated to generate a 2L ₁ signal. Further, the dividing unit 24 restores the L video signal by dividing 2 by the signal generated by the adding unit 23, and transmits the restored L video signal to the MEM 25. MEM25 is a division unit 2
The L video signal restored in step 4 is stored at a timing corresponding to two frames, and the stored L signal is output twice consecutively in units of one frame.

On the other hand, the subtraction section 26 generates a signal obtained by subtracting the difference signal from the sum signal delayed by the delay section 22. That is, in the subtraction unit 26, (L ₁ + R ₁ ) − (L ₁ −
R ₁ ) is calculated to generate a 2R ₁ signal, and the divider 27 divides the video signal generated by the subtractor 26 by two. Then, the inverting unit 89 restores the R video signal by inverting the high frequency component and the low frequency component in the horizontal direction of the video signal from the dividing unit 27, and converts this R video signal into ME.
Send to M28. Further, the MEM 28 stores the R video signal from the inverting unit 89 at a timing corresponding to two frames, and outputs the stored R signal twice in units of one frame.

Finally, a method of restoring a compatible video signal generated according to the second embodiment will be described.

A method of restoring the L video signal will be described.

The sum signal and the difference signal transmitted as compatible video signals are added, and the signal obtained by the addition is divided by 2 to restore the L video signal. That is, (L
₁ + kR ₁ + L ₁ -kR ₁ ) ÷ 2 is calculated and the L ₁ signal is restored. Thereafter, L ₂ , L ₃ ... Are restored in the same manner.

A method of restoring the R video signal will be described.

From the sum signal transmitted as a compatible video signal
Subtract the difference signal and add the video signal obtained by this subtraction.
Divide 2k. The horizontal high-frequency component of this video signal
Inverts the minute and low frequency components to restore the R video signal
You. After that, R₂, R ₃... is restored.

An apparatus for implementing the above method has been described in the method for restoring a compatible video signal generated in the first embodiment and the second embodiment, and therefore will not be described in this description. I do.

The operation of the above configuration will be described.

FIG. 16 is a block diagram of the stereoscopic video signal restoring device G.

Receiving section 21 receives the compatible video signal from stereoscopic video signal generating apparatus C, and transmits the received compatible video signal to delay section 22. Delay section 22 outputs the difference signal input next to the sum signal. The sum signal is delayed until a signal is input. When the difference signal, which is a video signal, is input to the stereoscopic video signal restoring device G, the adding unit 23 generates a signal that is delayed by the delay unit 22 and adds the difference signal to the sum signal.
Restores the L video signal by dividing the signal generated by the adder 23 by two. The restored video signal for L is
25, and the MEM 25 stores the L video signal restored by the divider 24 at a timing corresponding to two frames, and outputs the stored L signal twice consecutively in units of one frame.

On the other hand, the subtraction section 26 generates a signal obtained by subtracting the difference signal from the sum signal delayed by the delay section 22, and the division section 47 divides the video signal generated by the subtraction section 26 by 2k. Then, the inverting unit 89 inverts the high frequency component and the low frequency component in the horizontal direction of the video signal from the dividing unit 47 to restore the R video signal. This R video signal is M
Transmitted to the EM 28, and the MEM 28
The R video signal is stored at a timing corresponding to two frames, and the stored R signal is output twice in units of one frame.

Note that the parameter k does not need to be a constant value, but may be adaptively changed depending on the stereoscopic image. Further, in the above-described embodiment, the R video signal is used as the signal for multiplying the parameter, but the L video signal may be multiplied by the parameter. Further, in the present embodiment, the horizontal high frequency component and the low frequency component of the R video signal are inverted, but the horizontal high frequency component and the low frequency component of the L video signal may be inverted. realizable.

[0191]

According to the present invention, it is possible to generate a video signal capable of satisfying both a stereoscopic video signal and a normal video appreciation.

[Brief description of the drawings]

FIG. 1 is a diagram for describing a video signal according to a first embodiment.

FIG. 2 is a block diagram of a stereoscopic video signal generation device A that generates a video signal.

FIG. 3 is a block diagram of a stereoscopic video signal restoring device B for restoring a video signal.

FIG. 4 is a diagram for explaining the operation of MEMs 25 and 28;

FIG. 5 is a flowchart for explaining operations of a stereoscopic video signal generation device A and a stereoscopic video signal restoration device B.

FIG. 6 is a diagram for describing a video signal according to the second embodiment.

FIG. 7 is a block diagram of a stereoscopic video signal generation device C that generates a video signal.

FIG. 8 is a block diagram of a stereoscopic video signal restoring device D for restoring a video signal.

FIG. 9 is a flowchart for explaining the operation of the stereoscopic video signal restoration device D.

FIG. 10 shows a stereoscopic video signal restoration device E for restoring a video signal.
It is a block diagram of.

FIG. 11 is a diagram for explaining the operation of the comparison unit 57;

FIG. 12 is a block diagram of a frequency limiting device.

FIG. 13 is a diagram for explaining orientation reversal.

FIG. 14 is a block diagram of an orientation number reversing device.

FIG. 15 is a block diagram of a stereoscopic video signal restoration device F.

FIG. 16 is a block diagram of a stereoscopic video signal restoration device G.

[Explanation of symbols]

 Reference Signs List 11 subtraction unit 12 addition unit 13 stereoscopic video signal generation unit 14 transmission unit 21 reception unit 22 delay unit 25, 28 MEM 31, 47 division unit 57 comparison unit 89 inversion unit

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yukiko Soga 14 Nibancho, Chiyoda-ku, Tokyo Nippon Television Network Co., Ltd. F-term (reference) 5C061 AA01 AA14 AB01 AB08 AB12 AB17

Claims (34)

[Claims] 1. A method of generating a video signal of a stereoscopic video using a first video signal for generating a stereoscopic video and a second video signal complementary to the first video signal. A method, comprising: generating a sum signal of the first video signal and the second video signal; and generating a difference signal between the first video signal and the second video signal. Generating a stereoscopic video signal by alternately arranging the sum signal and the difference signal. 2. The stereoscopic camera according to claim 1, wherein the step of alternately arranging the sum signal and the difference signal to generate a stereoscopic video signal is an alternately arranging step for each frame. Video signal generation method. 3. The stereoscopic video signal generation method according to claim 1, wherein when generating the sum signal or the difference signal, a second video signal is multiplied by a parameter. 4. The method according to claim 3, wherein the parameter is adaptively changed. 5. When the stereoscopic video signal is an interlaced signal, the vertical frequency band of the interlaced signal is set to 1
The stereoscopic video signal generation according to any one of claims 1 to 4, wherein a sum signal and a difference signal are generated using the first video signal and the second video signal limited to / 2. Method. 6. The three-dimensional object according to claim 1, wherein a video signal obtained by inverting the orientation of the second video signal is used instead of the second video signal. Video signal generation method. 7. A transmission method for transmitting a video signal including a first video signal for generating a stereoscopic video and a second video signal complementary to the first video signal, Generating a sum signal of the first video signal and the second video signal; generating a difference signal between the first video signal and the second video signal; Transmitting the difference signal alternately on a frame-by-frame basis. 8. The video signal transmission method according to claim 7, wherein when the sum signal or the difference signal is generated, a second video signal is multiplied by a parameter. 9. The video signal transmission method according to claim 8, wherein the parameter is changed adaptively. 10. The apparatus according to claim 8, wherein the parameter is transmitted separately from the stereoscopic video signal.
2. The video signal transmission method according to 1. 11. The method according to claim 8, wherein the parameter is inserted into a blanking signal of the stereoscopic video signal.
The video signal transmission method according to claim 9. 12. When the stereoscopic video signal is an interlaced signal, a sum signal is generated by using the first video signal and the second video signal in which the vertical frequency band of the interlaced signal is limited to １ ／. The video signal transmission method according to claim 7, wherein the video signal transmission method generates a difference signal and a difference signal. 13. The method according to claim 7, further comprising using a video signal obtained by inverting the orientation of the second video signal, instead of the second video signal.
The video signal transmission method according to any one of the above. 14. A video signal transmitting and receiving a video signal including a first video signal for generating a stereoscopic video and a second video signal complementary to the first video signal. A transmission / reception method, comprising: generating a sum signal of the first video signal and the second video signal; and generating a difference signal between the first video signal and the second video signal. Transmitting the sum signal and the difference signal alternately in frame units; receiving the sum signal and the difference signal; and adding or subtracting the sum signal and the difference signal. Restoring the first video signal and the second video signal. 15. The method according to claim 14, wherein, when the sum signal or the difference signal is generated, a level of the second video signal is reduced by multiplying the second video signal by a parameter. How to send and receive video signals. 16. A method of restoring a first video signal and a second video signal, comprising: restoring a first video signal by adding or subtracting the sum signal and the difference signal; Restoring a second video signal multiplied by a parameter by adding or subtracting the sum signal and the difference signal; and changing the level of the restored second video signal to the restored second video signal. By making it the same as the level of the video signal of
Restoring the second video signal. The method according to claim 14, further comprising restoring the second video signal. 17. The video signal transmitting / receiving method according to claim 15, wherein the parameter is transmitted separately from the stereoscopic video signal. 18. The video signal transmitting / receiving method according to claim 15, wherein said parameter is adaptively changed. 19. When the stereoscopic video signal is an interlaced signal, a sum signal is generated by using the first video signal and the second video signal in which the vertical frequency band of the interlaced signal is limited to １ ／. 19. The video signal transmission / reception method according to claim 14, wherein a difference signal is generated. 20. The video according to claim 14, wherein a video signal obtained by inverting the orientation of the second video signal is used instead of the second video signal. How to send and receive signals. 21. A stereoscopic video signal for generating a stereoscopic video signal by using a first video signal for generating a stereoscopic video and a second video signal complementary to the first video signal. A video signal generation device, comprising: sum signal generation means for generating a sum signal of the first video signal and the second video signal; and a difference between the first video signal and the second video signal. A stereoscopic video signal generating apparatus comprising: a differential signal generating unit that generates a signal; and a unit that generates a stereoscopic video signal by alternately arranging the sum signal and the difference signal in frame units. 22. The stereoscopic video signal generating apparatus according to claim 21, wherein said sum signal generating means is a means for generating a sum signal after multiplying a second video signal by a parameter. 23. The stereoscopic video signal generation device according to claim 21, wherein the difference signal generation unit is a unit that generates a difference signal after multiplying the second video signal by a parameter. 24. The apparatus according to claim 22, further comprising means for adaptively changing the parameter.
3. The stereoscopic video signal generation device according to 3. 25. The stereoscopic video signal generating apparatus according to claim 22, further comprising a unit for inserting the parameter into a blanking signal of the stereoscopic video signal. 26. The apparatus according to claim 21, further comprising means for restricting a vertical frequency band of the interlaced signal to half. 27. The stereoscopic video signal generation of a video signal according to claim 21, further comprising means for generating a video signal in which the orientation of the second video signal is inverted. apparatus. 28. Transmitting and receiving a video signal of a stereoscopic video using a first video signal for generating a stereoscopic video and a second video signal complementary to the first video signal. A video signal transmitting and receiving system, comprising: a sum signal generating unit configured to generate a sum signal of the first video signal and the second video signal; Difference signal generating means for generating a difference signal; transmitting means for transmitting the sum signal and the difference signal alternately in frame units; receiving means for receiving a signal transmitted by the transmitting means; and receiving means Means for restoring the first video signal by adding the sum signal and the difference signal received in the step (c), and subtracting the sum signal and the difference signal received by the receiving means to obtain Means for restoring Video signal transmission / reception system. 29. The video signal transmission / reception system according to claim 28, further comprising means for multiplying the second video signal by a parameter. 30. The video signal transmitting / receiving system according to claim 29, further comprising means for adaptively changing the parameter. 31. The apparatus according to claim 2, further comprising means for transmitting the parameter separately from the stereoscopic video signal.
The video signal transmission / reception system according to claim 9 or 30. 32. The image signal transmitting / receiving system according to claim 28, further comprising means for inserting the parameter into a blanking signal of the stereoscopic video signal. 33. The image signal transmitting / receiving system according to claim 28, further comprising means for limiting a vertical frequency band of the interlaced signal to half. 34. The image signal transmitting / receiving system according to claim 28, further comprising means for generating a video signal in which the orientation of the second video signal is inverted.