JPS63142794A - Television receiver - Google Patents

Abstract

PURPOSE:To obtain a signal for a stereoscopic picture by performing a third information correction by an outline detecting means, generating a second pic ture data, which is the first picture data having a parallax by shifting the picture of the first picture data based on the third information and the second information, and adding a shadow to every picture data. CONSTITUTION:When the information of about 2MHz showing the depth of the picture is corrected by the output of the detection of the outline part of the picture, the exact depth component of every object can be obtained. Then, by using the information for shifting the position of the picture multiplexed in a vertical fly-back period, the second picture data for a right eye, which has the parallax against the first picture data for a left eye transmitted as a television signal, is generated. Besides, by using the information for adding the shadow, multiplexed in the vertical fly-back period, the shadow is generated to the respective picture data by shifting spatially the respective object. Thus, the picture, which has the parallax against the left and the right eyes respective ly, and has the shadow, can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to television signal transmission and signal processing, and particularly to a television device suitable for reproducing stereoscopic images.

[Conventional technology]

To view color television stereoscopically, information for the right eye and information for the left eye are transmitted, and these two types of information are combined using, for example, two polarizing filters and a half mirror. This can be achieved by viewing using glasses or the like. However, this method may require two transmission lines, making it difficult to use in applications other than packages. (For example, it can be used satisfactorily in personal systems such as video disc players, but it is difficult to use in public broadcasting systems.

) In order to eliminate the above drawbacks, for example,
Publication No. 678 and the like have been proposed.

In the known example, for example, a signal from a color television summer camera is used as a right eye signal, the line sum of the luminance signal is band-limited as the first signal, and the line difference component is band-limited as the second signal 9. The color signal is used as the fourth signal, and the signal from the black and white camera is band-limited as the left eye signal.
This is the third signal. The second signal obtained here and the fourth signal
Balance modulating the signals at different frequencies (for example, f = 3.58MFIZ for the second signal, fd = 4.5M [lz] for the fourth signal),
Of these, the balanced modulated second signal is superimposed on the high-frequency component of the first signal, and the fourth signal is superimposed on the high-frequency component of the third signal, and the two types of signals thus obtained are converted into line-sequential signals. Transmit (transmit alternately for each line).

On the decoder side, a color video signal for the right eye and a monochrome signal for the left eye are extracted from the line sequential signal and reproduced using a polarizing filter or the like to obtain a stereoscopic video.

According to the above-mentioned known example, it becomes possible to transmit stereoscopic images using one channel, which has been a problem in the past.

[Problem that the invention seeks to solve]

Although the above conventional technology uses a single transmission channel and is capable of transmission using the current broadcasting system, the signal that is actually sent is completely different from the current NTSC signal. When reproduced with a receiver (i.e., a receiver designed to receive NTSC signals), it is confirmed that the sum-difference signal is being sent and that the line-difference signal is also superimposed on the color signal band. A number of disturbances occur due to this. Therefore, it can only be applied within a closed system (for example, in a local broadcast system rather than a wide area broadcast system).

The purpose of the present invention is to solve the problems of the prior art described above,
In addition to providing a stereoscopic image transmission method that is completely compatible with NTSC, in which normal images can be obtained with current receivers and stereoscopic images can be obtained using a stereoscopic image receiving device, An object of the present invention is to provide a television device as a receiving device.

[Means for solving problems]

In order to achieve the above object, the present invention utilizes the fact that a sense of perspective occurs when an image with parallax is viewed with the right eye and the left eye, and a method for adding shadows to the image. The first information and the second information for shifting the image position are multiplexed within the vertical retrace period, and the phase of the carrier signal for frequency converting the third information indicating the depth of the image is set in the frame. The third information is multiplexed within the transmission band by the frequency conversion, and the color television signal is received, and the third information is multiplexed from the received color television signal. a first separation means for separating third information and a color signal; a second separation means for separating the third information from a separated output from the first separation means; demodulating means for demodulating the information of the color television signal; stereoscopic information detecting means for detecting the first and second information multiplexed from the color television signal within its vertical retrace period; and the color television signal. a contour detection means for detecting a contour portion of an image from the image; a three-dimensional correction means for correcting third information demodulated by the demodulation means based on a detection output from the contour detection means; inputting first image data obtained from the signal, and shifting an image in the first image data according to its depth based on the corrected third information and the detected second information; Accordingly, the first image is generated by generating means for generating second image data having a parallax with respect to the data, and generating means for generating second image data having a parallax with respect to the data; 1 image data and 2nd image data
a shading means for adding shading to each of the image data, and a shading means for adding shading to the first image data and the second image data obtained from the means, respectively, to obtain a π-body image. A signal for the eye (or a signal for the left eye) and a signal for the left eye (or a signal for the right eye) are provided.

[Effect]

In the present invention, relatively simple images such as animations are handled as images. Animations and the like are mostly composed of lines that indicate outlines. Therefore, it is easy to distinguish between various types of objects in an image.

Utilizing this fact, by correcting the information indicating the depth component of an image at approximately 2 MHz using the detection output of detecting the outline of the image, it is possible to accurately distinguish between various types of objects, and to calculate the exact depth component of each object. can be found. Then, using information for shifting the position of the multiplexed images within the vertical retrace period, the right eye with parallax is Create second image data for eyes.

Furthermore, information for adding multiplexed shadows within the vertical conductor period is used for each of the sent first image data for the left eye and second image data for the right eye. , creates a shadow by spatially moving each object. In the manner described above, it is possible to obtain images with parallax and shadows for each of the left and right eyes, so that it is possible to provide animation with a sense of perspective.

〔Example〕

First, before explaining a television apparatus as an embodiment of the present invention, a transmitted television jaw signal will be explained.

This signal is a signal of the current television broadcasting system with stereoscopic image information added. This stereoscopic image information consists of three types: information indicating the direction of the image, information for shifting the position of the image, and information for adding a shadow.

Information indicating the depth of an image is a plane signal (or plane information). In other words, a normal image consists of one picture, as shown in Fig. 2(a).
This is the foreground as shown in Figure 2(b).

Planes 1 to 40 of one picture according to the hierarchical structure in the order of the background
A plane signal is obtained by dividing the image into four normal images, detecting which part of the image belongs to which plane, and expressing each of the parts for each line of the image. Therefore, the second
In the image of (a), the lurain signal [Okerbrane signal is the second]
It is as shown in Figure (c).

Further, the information for shifting the position of the image is parallax information indicating the image shift between the two eyes due to parallax, and
Information for adding a shadow is information for adding a shadow to an object in order to make the object appear more three-dimensional.

In addition, images that can be handled include animation or T.
It is assumed that the image is a relatively simple image such as a V game.

This is because the animation 57 and the like are mostly composed of lines indicating outlines, and therefore it is easy to distinguish various types of objects from the image.

Of the three-dimensional image information described above, information for shifting the position of the image and information for adding shadows are multiplexed within the vertical retrace period of the video. The situation is shown in Figure 3 (a).
Shown below. FIG. 3(a) shows the case where the signal is multiplexed onto the 18th H within the vertical retrace period of the television signal. In the figure, the three-dimensional image information is multiplexed in the form of binary digital signals.

At the beginning of this multiplexed information is a synchronization signal used for clock reproduction to correctly extract these digital signals. The next signal is a synchronization signal indicating the start of data.

Following this synchronization signal, data for moving the screen (
There are 4 bytes of information (for shifting the position of the image). The data for moving the screen is equivalent to 4 planes, and 8 bits are allocated to each plane. The contents of the data for moving the screen for one brane are shown in Figure 3 (b).
As shown in the figure, the first 4 bits are the amount of movement in the X direction, and the second 4 bits are the amount of movement in the X direction.
The bit is the amount of movement in the X direction.

Next to the data for moving these screens, information for adding shadows is multiplexed as shown in Figure 3 (al). Of the information for adding shadows, the first byte is Information indicating the position to place a shadow, 4 as information in the X direction
4 bits are allocated as information in the X direction. After the information indicating the position where the shadow is cast, the information shown in Figure 3 (
Information indicating the presence/absence and size of a shadow, which has a meaning as indicated by cl, is multiplexed with 2 bits.

The above is the explanation of the information for shifting the position of images multiplexed within the vertical retrace period and the information for adding shadows, among the three-dimensional image information. Next, of the stereoscopic image information, information (plane signal) indicating the depth of images multiplexed within a video period will be explained.

Information indicating the depth of the image (hereinafter sometimes referred to as the depth component of the image) is multiplexed within the transmission band by frequency conversion. This is a carrier wave (frequency is fscC color sub-transmission wave frequency) for performing this frequency conversion. ) is reversed between lines or frames, as shown in Figure 4(a), and between fields, the phase of a scanning line within a field is immediately above the previous field. In other words, the phases ψ and ψ1π of the carrier waves are assigned so that they are the same as the phase of the scanning line. In addition, in FIG. 4(a),
The white circles are scanning lines, and the broken lines indicate that the scanning lines are in the same phase.

Therefore, in order to separate the depth component of an image from a normal video signal, a three-dimensional spatiotemporal filter that uses inter-frame and inter-field operations and adds a temporal axis to a two-dimensional spatial axis is required. .

Here, a method of frequency t-converting the depth component of an image within the transmission band will be described.

In FIG. 4(b), D is a signal indicating the depth component of the image, and is information of 0 to 2 MEIz. In order to have complete communication with the current television system, this depth component must be inserted into the gap between the signals of the current television system, and this insertion can be done by the means shown in Figure 5(a). It will be done. In this method, by using the multiplier 502, the frequency of 0.5 f sc (1.8 MHz
) carrier wave (The carrier wave explained in Fig. 4 (al) has a frequency of f, but the carrier wave used here is 0.5f8C.
It is. ) μo is amplitude-modulated with the center component of the image band-limited to 2MHz with LPF501, and HPF5
03, the upper sideband μ0μ0 is taken to obtain the signal. Then, using the adder 506, the LPF 504°505
and the color signal modulated by the multiplier 509. After that, it passes through the LPF 507 and is added to the luminance signal by an adder 508, resulting in an NTS signal containing the depth component of the image.
The C signal is obtained as shown in FIG. 4(c).

Thus, the ) information is frequency shifted from 1.8 to 3.8 MHz. Zhou! 'T! When the result of the shift is expressed in the time-vertical frequency domain, it becomes as shown in Fig. 4(d),
This means that it has been inserted into the first and third quadrants.

Next, a method for reproducing the depth component of this multiplexed image will be explained. FIG. 5(b) shows means for reproducing the depth component of this image.

In FIG. 5(b), 511 is a video signal containing the depth component of an NTSC compatible image, 512 to 51
4 is a spatio-temporal filter, 515 is a subtracter, 516 is a multiplier, 517 is an LPF, 518 is a luminance signal, 519 is a depth component of the image, 521 is a multiplier, 522 and 523 are L
P F, 524 and 525 are color signals.

Video signal 511 containing the depth component of the sent image
The depth component D of the image is determined by the spatio-temporal filter 512 from
′ and color signal components are extracted. Then, this spatio-temporal filter 512 extracts the video signal 511 containing the depth component of the image.
If the output is subtracted by the subtracter 515, the luminance signal component 51
8 is obtained. Further, the depth component D' of the frequency-shifted image is extracted by the spatio-temporal filter 513. The output of this spatio-temporal filter 513 is o, s, 7'. (
1,81'vlJ1z) carrier wave 110 is applied to the multiplier 51
By multiplying by 6 and taking the lower sideband by L P F 517, the depth component of the image with the original band of 0 to 2 MHz can be obtained.

Regarding the color signal, the output of the spatiotemporal filter 514 is multiplied by the color subcarrier fsc using the multiplier 521, and L P
By passing F 522 and 523, a Q signal 524 and an I signal 525 can be extracted.

Note that the spatio-temporal filters 512, 513, and 514 will be further explained using FIG. 5(C). The spatio-temporal filters 512, 513, and 514 are three-dimensional filters configured by adding a time axis to a spatial axis, and are known in the literature "EDTV signal system with complete compatibility - Part 2.
The filter characteristics are shown in "Prototype Production of a Principle Model Having Motion Adaptive Characteristics", Journal of the Television Network Society, Vol. 39, No. 10, pp. 891-897.

Here, a spatiotemporal filter configuration for a still image will be described.

In FIG. 5(c), 511 is a television signal containing a depth component of an image, 512 to 514 are spatiotemporal filters, and 5
15- is a subtracter, 531 is a 525H delay circuit, 532 is a subtracter, 533 is a coefficient unit, 534 is a BPF, 535 is a 2
62H delay circuit, 536 a subtracter, and 537 an adder.

First, the subtracter 532 subtracts the output of the 525H delay circuit 531 and the television signal 511 containing the depth component of the image.
The depth component and color signal of the image, which are difference signals between frames, are extracted by multiplying by 0.5 by a coefficient unit 533. Then, using the subtracter 515, the television signal 511 containing the depth component of the image and the coefficient multiplier 533
If the difference between the outputs is taken, the luminance signal component 518 is obtained by the subtracter 515.
can be obtained as output. Furthermore, B P F 53
After extracting the 1.8-4.2Mfiz band with 4, 26
The depth component and color signal of the image can be extracted separately by addition and subtraction with the signal delayed by 262H by the 2H delay circuit 535.

As explained above, information for shifting the image position and information for adding shadows are multiplexed within the vertical retrace period of the video, and information indicating the depth of the image is multiplexed within the transmission band by frequency conversion. Each of these is added to the color television signal of the current television broadcasting system and transmitted.

Next, a television set as an embodiment of the present invention will be described.

FIG. 1 is a block diagram showing one embodiment of the present invention.

The television device shown in FIG. 1 is a device for receiving color television signals sent as described above and obtaining stereoscopic images from the signals.

In FIG. 1, 100 is a general receiving anti-9101.
102 is a tuner, 102 is a three-dimensional information detection circuit, 103 is a demodulation circuit, 104 is a contour detection circuit, 105 is a three-dimensional correction circuit,
Reference numeral 106 indicates a circuit for adding screen shadows for the left eye, 107 indicates a screen shift circuit for the right eye, 108 indicates a screen interpolation circuit for the right eye, and 109 indicates a circuit for adding screen shadows for the right eye.

The operation shown in FIG. 1 will be explained below.

The television signal sent from the transmitting side (in which stereoscopic image information is multiplexed) passes through the receiving antenna 100 and is sent to the tuner 1.
01, it is demodulated into a composite video signal. As the tuner 101 used at this time, a normal television tuner can be used as is.

The composite video signal obtained from the tuner 101 includes information indicating the depth of the image (plain signal) and information for shifting the positions of the two images (disparity information indicating the image shift between the two eyes due to parallax, hereinafter referred to as (hereinafter referred to as parallax information), and information for adding shadows (hereinafter referred to as "information"), three-dimensional image information is multiplexed. The parallax information and shadowing information are extracted by the stereoscopic information detection circuit 102.

On the other hand, in the demodulation circuit 103, a luminance signal Y and a color difference signal Q are obtained from the composite video signal obtained from the tuner 101 using the configuration shown in FIG.

(3), and also demodulates information (plain signal) D indicating the depth of the image, which is frequency-multiplexed on the free spatial frequency portion of the video signal (high frequency portion of the luminance signal). Information indicating the depth of this demodulated image (plane signal) is input to the stereoscopic information detection circuit 102, and together with other previously extracted stereoscopic image information, control information for creating a stereoscopic image, as described later. Next, the three-dimensional correction circuit 105 performs the following correction on the information indicating the depth of the image (plane signal) inputted from the three-dimensional information detection circuit 102.

In other words, since the plain signal has a very narrow band of about 2 MHz, even if it is accurately demodulated in the demodulation circuit 103, it will not produce a signal like the one shown in FIG. , the falling part is not steep (the waveform becomes rounded) (that is, the transition part of the plane becomes unclear).

Therefore, if this plane signal is used as is, the edges (contours) of the reproduced image will become blurred.

Therefore, first, the contour detection circuit 10a detects the contour portion of the image from the brightness signal obtained by the demodulation circuit 103 to obtain contour information (the brightness signal has a wide band of 4.2 Mflz, so the contour can be detected correctly). Then, the three-dimensional correction circuit 105 refers to the contour information, accurately grasps the transition portion of the plane of the plane signal (the rising and falling portions of the waveform), and the transition portion of the plane is determined as shown in Fig. 2. (The plane signal is corrected so that it becomes clear as shown in cl. Hereinafter, this corrected plane signal will be referred to as plane data.

By the way, in general, the right-eye image shifts to the left side than the left-eye image due to the parallax of the eyes when the left-eye image position is used as a reference. A circuit that compensates for the influence of this parallax is a right-eye screen shift circuit 107, which will be described next. The right-eye screen shift circuit 107 inputs the image data obtained from the demodulation circuit 103 and appropriately shifts the image to the left side of the screen for each plane based on the parallax information from the stereoscopic information detection circuit 102.

Note that each plane can be distinguished by plane data from the three-dimensional correction circuit 105.

However, due to the above-described shift operation, the position where the image was originally located becomes blank. Therefore, the next right-eye screen interpolation circuit 108 interpolates this blank area using surrounding pixels. That is, the right-eye screen interpolation circuit 108 inputs the image data from the right-eye screen shift circuit 107, and calculates a blank space based on the brain data from the stereoscopic correction circuit 105 and the <) parallax information from the stereoscopic information detection circuit 102. It detects a part and performs interpolation for that part.

Next, the image data interpolated by the right eye screen interpolation circuit 108 is sent to the right eye screen shading circuit 109, and the demodulation circuit 10
The image data from 3 is sent to the circuit 106 for left eye screen shading.
Each is input. These screen shadows are the circuit 106,
109, the plain data from the 3D correction circuit 105 and the shading obtained by the 3D information detection circuit 102 are combined with information (.
Based on this, shadows are cast on the input image data to give it a three-dimensional effect.

In the manner described above, a stereoscopic image signal consisting of a left eye signal and a right eye signal is obtained. These stereoscopic image signals can be enjoyed as stereoscopic images by passing them through a stereoscopic viewing device using conventional polarizing glasses or the like.

The details of each circuit shown in FIG. 1 will be explained below.

FIG. 6 is a block diagram showing details of the stereoscopic correction circuit 105 of FIG. 1. The figure will be explained below.

The plane signal obtained by the three-dimensional information detection circuit 102 in FIG. 1 is temporarily held in a data holding circuit 601, and compared with a reference value by comparing circuits 602 to 604. This reference value is given the same level as the level given to planes 1 to 4 on the transmitting side. The plane signals whose magnitudes have been compared are separated into plane signals 1' to 4' by a decoder circuit 605. This separated plane signal is originally created from a plane signal with a narrow band, so as mentioned above, the boundary part has some deviation from the actual outline of the original image. Each plane signal is corrected by the following operations to match the original image.

The plane signal 1' obtained by the decoder 605 is shifted by 2 data by the shift register 606.

First output data Q1 from shift register 606
The comparator circuit 607 determines the size of the 2nth output data Q2n, and when Q1≧Q2rL, data “1” and others output data “0”, and this is transferred to the shift register 6.
The holding circuit 609 holds the edge pulse from the contour detection circuit 104 which has been shifted by n data at 08, and becomes an accurate plane signal 1. In other words, if the input plane signal 1' has a level change before and after the contour of the original image, the contour position corresponds to the correct change position of the brain signal.

The plane signal 1 obtained in this way is input to the decoder 610 together with the other plane signals 2 to 4. Note that the other plane signals 2 to 4 are also created in exactly the same manner as the plane signal 1. For example, in the decoder 610, when plane signal 1 is 1#, output is 00'', when plane signal 2 is '1'', '01'' is output, when plane signal 3 is 1'', output is '10', and when plane signal 4 is When is 1'', '11'' is output, respectively. The brain data output in this way is transmitted to the right eye screen shift circuit 107.
．． Right eye screen interpolation circuit 108. Screen shading for right eye is circuit 1
09. The screen shading for the left eye is input to the circuit 106, respectively.

Next, a detailed explanation of the right eye image shift circuit 107 will be given in the seventh section.
This will be explained using figures.

For simplicity, the description will be made assuming that the screen is composed of only two branes, a foreground and a background.

In FIG. 7, 800 is an input terminal for parallax information, 801
is an input terminal for plain data, 802 is an input terminal for image side data, 803 is an output terminal for data with the foreground shifted,
804 is one block of the shift circuit, and 805 is another block of the shift circuit, which has the same configuration as 804. 8
06 is a memory table that outputs the amount by which the foreground is to be shifted by plain data; 807 is a register that stores the address and data of the pixel that needs to be shifted, and the amount of shift;
08 is an address counter that generates an address for one line, 809 is an address/data correction circuit that creates an address for rewriting data and data to be rewritten from the shift amount, and 810 is a switch that switches between normal data and data to be corrected for each line. 811 is a switch circuit that switches between a normal address and the address of data to be converted for each line, 812 is a line memory that stores data for one line, and 813 is a shift circuit from blocks 804 and 805 for each line. This is a switch circuit that switches data.

In FIG. 7, during one line, each of the switch circuits 810, 811, 813 is connected to the side opposite to that shown in the figure. At this time, line memory 8
At step 12, the corrected data is read and at the same time new data is written. Also, memory table 806
, each shift amount (positional movement amount) for each brane is calculated based on the parallax information from the stereoscopic information detection circuit 102.
is memorized. Note that since the parallax information is obtained every vertical period as described above, each stored shift)-t is also updated each time.

The memory table 806 is stored in the three-dimensional correction circuit 105.
According to the input plane data, the shift amount of the corresponding brane is output to the register 807.2 In this case, since there are only two branes, the foreground and the background, the memory table 806 stores only the shift amount for the foreground. When data indicating that it is a foreground brane is input as plane data, the stored foreground shift amount is output to the register 807.

Further, the register 807 receives the address from the address counter 808 and the address from the input terminal 8 from the demodulation circuit 103 in FIG.
One image data is input through 02. In this way, the register 807 stores the address, shift amount, and data of data to be shifted within one line.

In the next line, each switch circuit 810, 811, 8
13 are connected as shown, the IH memory 812 is given a power address for shifting data from the address correction circuit 809 and its data, and new foreground data is written. Through the above operations, one line of data in which the foreground is shifted by a certain amount with respect to the background is stored in the line memory 812. This data is sequentially output on the next line. The above operations are similarly performed in block 805. However, since the connection directions of the switch circuits in blocks 804 and 805 are always opposite, corrected data can be read out continuously from the output terminal 803 by switching the switch circuit 813 for each IH. .

For simplicity, only the movement in the X direction has been described above, but if it is necessary to also shift in the Y direction, this can be accomplished by using several line memories with a similar configuration.

Next, the right eye screen interpolation circuit 108 will be explained in detail with reference to FIGS. 8 to 10.

In FIG. 8, the foreground (
FIG. 12 is an explanatory diagram showing the foreground as the area within the solid line by shifting the area within the broken line by the amount of parallax. In this case, a new shaded area is required as the background, but since the information in this part is not actually transmitted, it is necessary to interpolate it from other information.

In the present invention, images are limited to relatively simple images such as animations or TV games, and even if the background has a lower resolution than the foreground, there is no shadow tower.
For areas where new information is required, interpolation is performed using adjacent background information.

FIG. 9 shows an example of an interpolation method. Figure 9 (al is data of a certain eclipse line...αn-1+an+αu+1...
This is data for the left eye, that is, the original image. (b
) is plain data corresponding to (a). here,
For example, assume that in the plane data, O indicates the background and 1 indicates the foreground. Information for the right eye is provided by the right eye screen shift circuit 10.
In order to shift the foreground to the left by 7,
As shown in the figure, there are parts with no data.

Therefore, by interpolating the data axis +4 on the right side, the blank part is filled in as shown in FIG. 9 (dl).

An example of this actual circuit is shown in FIG.

In FIG. 10, 1100 is an input terminal for parallax information;
101 is an input terminal for plain data, 1102 is an input terminal for image data, 1103 is an output terminal for processed image data, 1104 is one block of the screen interpolation circuit for the right eye,
1105 is a block with the same configuration as 1104, 1106
1107 is a delay circuit for delaying plane data by one clock; 1107 is a memory table for calculating a shift amount from two adjacent plane data and disparity information; 1108
1109 is an address counter for IH, and 1110 generates an actual interpolated address and interpolated data from the shift amount, address, and interpolated data. An interpolation address data generation circuit, 1111 is a switch circuit that switches data for each IH, 1112 is a switch circuit that switches addresses for each IH, 1113 is an IH memory, and 1114 is a switch circuit that switches 1104 and 1105 for each IH.

In a certain line, switch circuits 1111, 1112
, 1114 are connected to the side opposite to that shown in FIG. 10, and the line memory 1113 reads data for IH and writes new data.

At this time, the plane data input from the input terminal 1101 is combined with the adjacent plane data from the table memory 1107.
The amount of shift is obtained based on the comparison result and the parallax information from the stereoscopic information detection circuit 102. Then, the obtained shift amount and address counter 1109
, and the image data obtained from the right eye screen shift circuit 107 via the input terminal 1102 are stored in the register 1108. In the next IH period, each switch circuit 1111, 1112.

1114 is connected as shown in the figure, and also inputs the shift amount, data, and address from the register 1108 to an interpolation address/data generation circuit 1110, which generates an address to be actually written. and interpolate the data.

This completes one complete line of data for the right eye. By switching the circuits 1104 and 1105 for each line, interpolated image data is output.

Next, the screen shading for the left eye in FIG. 1 is provided by the circuit 106. Screen shading for the right eye will be explained with reference to the circuit 109 with reference to FIGS. 11 and 12. For simplicity, the screen is in the foreground.

The explanation will be made assuming that it is composed of only two background planes.

As shown in FIG. 1, plane data is input from the three-dimensional correction circuit 105 to the screen shading circuits 106 and 109, and using this plain data, the screen shading is provided in the circuit. Frame memory (or field memory) VC stores information as shown in FIG. 11(a). Here, the shaded area corresponds to the foreground, and the other areas correspond to the background. Next, the screen shading circuits 106 and 109 take this inverted signal and obtain information as shown in FIG. 11(b).

Further, the screen shading circuits 106 and 109 input the shading information obtained by the three-dimensional information detection circuit 102 and which was multiplexed during the vertical retrace period, and use the information to perform the shading on the first screen.
The foreground part in FIG. 1(a) is shifted and moved to the position of the shadow to obtain the information shown in FIG. 11(c).

FIG. 12(a) is an explanatory diagram for explaining the operation for obtaining the information in FIG. 11(C) from the information in FIG. 11(al), and FIG. 12(bl is the screen shadow of FIG. 1). Attached is a block diagram showing the configuration of a part of the circuit, showing a circuit used to obtain the information in FIG. 11(c) from the information in FIG. 11(a).

To obtain the information in FIG. 11(c) from the information in FIG. 11(a), the following operation is performed.

In FIG. 11(a), the distance to the foreground is given by the digital signal multiplexed with the vertical blanking, that is, the shading is given by information, so the distance from the foreground is determined by the distance shown in FIG. 11(a).
The reading start point of the frame memory (or field memory) where the information shown in FIG. 12 (a) is stored.
)) is shifted and read out, as shown in Fig. 11(C)
The following information is obtained. In the actual circuit, Figure 12 (b
), the outputs of the X and y address counters are
This is done by adding the values of the X component and the X component of the shift amount (movement distance), respectively, and using the added value as the address of the frame memory (or field memory).

Next, the screen shading circuits 106 and 109 calculate the logical sum of the information shown in FIG. 11(b) and the information shown in FIG. Figure 11 (
dl (in FIG. 11(d), the shaded area corresponds to the position where the shadow is added).

FIG. 12(c) is a circuit diagram showing the configuration of a part of the circuit for screen shading in FIG. 1, and the circuit for actually performing shading based on the information in FIG. 11(d) It shows.

The information shown in FIG. 11(d) obtained as described above is input as a control signal to the switch circuit 1202 via the input terminal 1200 shown in FIG. In the case of the screen shading for the right eye, the image data from the demodulation circuit 103 is inputted to the circuit 106, and the image data from the right eye screen interpolation circuit 108 is inputted to the circuit 109 for the screen shading for the right eye. One input signal is input to one input a of the switch circuit 1202 via an attenuator 1203, and the other branched into two inputs is input to the other input terminal a of the switch circuit 1202. It is driven by a control signal inputted from the switch, and the 91" portion (hatched portion) shown in FIG. 11 (di) is connected to the a terminal of the switch, and the "0" portion is connected to the b terminal. Input terminal 120
Image data input from 1 (luminance signal or R, G
, B signal) is multiplied by an attenuation constant α by the attenuator 1203 at the shaded position (that is, the shaded area in FIG. 11(d)), and outputted with a lowered level. In this way, shadows are added to the image data as the level is lowered.

〔Effect of the invention〕

According to the present invention, stereoscopic images can be transmitted while being compatible with conventional transmission paths. That is, with the current receivers, normal images can be obtained, and by using the stereoscopic image receiving apparatus of the present invention, it is possible to stereoscopically view monotonous images such as animated stamp images. This has the effect that stereoscopic images can be obtained while maintaining full compatibility with conventional transmission and reception systems.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a television device as an embodiment of the present invention, and FIG. 2 is a plain signal (depth information).
3 is an explanatory diagram for explaining the method of multiplexing the parallax information and shading, and FIG. Explanatory diagram, FIG. 5(a) is a block diagram showing a circuit for multiplexing depth information (plain signal) into a television signal, FIG. 5(c) is a block diagram showing the configuration of the spatio-temporal filter in FIG. 5(bl), FIG. 6 is a block diagram showing the stereoscopic correction circuit in FIG. 1, FIG. 7 is a block diagram showing the right-eye screen shift circuit in FIG. 1, FIGS. 8 and 9 are explanatory diagrams for explaining the operation of the right-eye screen correction circuit in FIG. 1, and FIG. 10 is a block diagram showing the right-eye screen shift circuit in FIG. Fig. 1 is a block diagram showing the screen correction circuit for the right eye; Fig. 11 is an explanatory diagram for explaining the operation of the circuit;
An explanatory diagram for explaining the operation of b), Fig. 12 (bl is the screen in Fig. 1. The shaded part is a block diagram showing the configuration of a part of the circuit, and Fig. 12 (c) is the screen in Fig. 1 as well. Shading is a block diagram showing the configuration of a part of the circuit. 102... Stereoscopic information detection circuit, 104... Contour detection circuit, 105... Stereoscopic correction circuit, 106... Screen shadow for left eye. 107... Right eye screen shift circuit, 108... Right eye screen interpolation circuit, 109... Right eye screen shadowing is a circuit. Graduation / Concave No. 20 <a) Maya (fu)? / fart gate (C) n-line huge t-'ht1) p-phone n'
；U'□1g.剟 3 巳EL ME4 fig. (α) Easy, S day n5 fill jril Takaotsuro da complete 7th 8th prisoner t? Eyes too, /θview/Right No. 11 II! 1 (cLn

Claims (1)

[Claims] 1. Within the vertical retrace period, first information for adding shading to the image and second information for shifting the position of the image are multiplexed, and the depth of the image is The color television is transmitted by selecting the phase of a carrier signal for frequency-converting third information indicating the frequency to be inverted for each frame, and multiplexing the third information within the transmission band by the frequency conversion. a first separating means that receives the signal and separates the third information and the color signal multiplexed from the received color television signal; demodulating means for demodulating the separated third information; and demodulating means for demodulating the separated third information; a three-dimensional information detection means for detecting the information of the image, a contour detection means for detecting the contour portion of the image from the color television signal, and a third information demodulated by the demodulation means as a detection output from the contour detection means. a three-dimensional correction means that corrects the first image data based on the corrected third information and the detected second information; By shifting the image in the image data according to its depth,
generating means for generating second image data having parallax with respect to the first image data; and generating means for generating the first image based on the corrected third information and the detected first information. shading means for adding shading to each of the data and the second image data, and obtaining a stereoscopic image from the first image data and the second image data obtained from the shading means, respectively; A television device characterized in that a right eye signal (or left eye signal) and a left eye signal (or right eye signal) are provided.