JP6786107B2 - Color moving image transmission device, color moving image receiving device, color moving image transmission / reception system, color moving image transmission method and color moving image receiving method - Google Patents

Description

The present invention relates to a video signal format for efficiently and high-quality transmission of a color moving image and a receiving method thereof. A color moving image transmission method suitable for information compression by using a light color plane close to white in particular. And the method of receiving color moving images.

<Color moving image>
Not limited to moving images, color image signals are formed by three additive primary colors of red (Red), green (Green), and blue (Blue), and imaging and display are performed in this form. On the other hand, as a form for transmission or recording, a signal formed by luminance and two color differences is used. In moving images, the composite method is mainly used for analog video, and the component method is used for digital video.

<Composite method>
NTSC, PAL, SECAM, and the like have been used as a color television system compatible with a black-and-white television signal that transmits only a luminance component. These are superimposed on the luminance component by changing the color difference component for each line, and are called composite signals in contrast to the components described later. Not only is it compatible with black-and-white TV signals, but it is easy to handle because it requires only one signal.

These methods were not used in digital broadcasting and the like because they are not suitable for high-efficiency coding (information compression). A simple method that does not use motion compensation could be applied to this type of signal, but the application of motion compensation was not realistic. The efficiency is extremely low because motion compensation can be performed only with two-pixel accuracy due to the phase relationship of the color information superimposed on the luminance. It should be noted that the current motion compensation generally has a quarter pixel accuracy.

<Component method>
The component method is to transmit the luminance and the two color differences to the composite by separate systems (channels). In VTRs for broadcasting, it was also used in analog, but it is mainly used in digital video. The brightness and the two color differences are obtained by a predetermined conversion from the three primary colors, and the color difference is often subsampled. Specifically, there is 4: 2: 2, which is subsampled in half in the horizontal direction, and 4: 2: 0, which is subsampled in half in both horizontal and vertical directions. 4: 2: 2 is used for broadcasting production equipment, but 4: 2: 0 is used for broadcasting itself, consumer equipment such as televisions, and the Internet. Motion compensation is a little troublesome because the image size of the color difference signal is different from the luminance, but it is possible to improve efficiency because there are no restrictions like composite.

<Frame sequential method>
There is a method in which only one of R, G, and B is used for each frame (field in the case of interlaced scanning) of a moving image. This is called a frame (field) sequential, and each frame has only one of R, G, and B planes (color planes). This method can be imaged, transmitted, or displayed, but the situation is different. In the display, the R, G, and B planes originally imaged at the same timing are generally displayed with a time lag. It is used in DLP type projectors. In this case, the display frame rate is tripled (180 fps) with respect to the full color frame rate (60 fps).

On the other hand, when frame sequential is applied to imaging and transmission, R, G, and B are separate frames. In this case, the rate of one color is one-third (20 fps) with respect to the frame rate (60 fps). Since one frame has only one plane, the amount of data is the same as that of only brightness (or a single color), and the amount of data is small and rational. In addition, since only one video signal is required, it is easy to handle. However, in order to obtain a full-color image, it is necessary to interpolate and form the remaining two colors that do not exist in each frame (for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2012-142817

Each of the conventional color moving image transmission methods has the following problems. Since the color difference component of the composite signal was changed for each line and superimposed on the luminance component, motion compensation could not be performed properly and it was not suitable for information compression. The component signal requires three systems to transmit the luminance component and the two color difference components separately, which increases the amount of information and processing, and the color difference signal is subsampled, so the image quality is particularly high in the highly saturated part. Deterioration became remarkable. In the frame sequential signal, motion estimation between frames having different colors could not be performed appropriately in a highly saturated portion, and conversion processing for aligning all RGB colors was not easy.

The present invention has been made in view of the above-mentioned problems in the prior art, and an object of the present invention is to perform appropriate motion estimation between frames of different colors in frame sequential video transmission.

As a result of diligent studies on a configuration for performing appropriate motion estimation between frames of different colors in frame sequential video transmission, the present inventor came up with the following configuration and arrived at the present invention.

That is, according to the present invention, there is a device for transmitting a color moving image, a means for sequentially acquiring a first primary color image, a second primary color image, and a third primary color image in frame units, and three types of acquisition. The means for generating the first light-colored image by weight-adding the primary color images of the above so that the addition ratio of the first primary color image is lower than that of the remaining primary color images, and the acquired three types of primary color images. , A means for generating a second light color image by weighting and adding so that the addition ratio of the second primary color image is lower than that of the remaining primary color images, and the acquired three types of primary color images are added to the third primary color image. A means for generating a third light color image by weighting and adding so that the addition ratio of the primary color images is lower than that of the remaining primary color images, and the generated first light color image and the second light color image. A means for sequentially transmitting the third light-colored image in frame units, a color moving image transmission device including, and a color moving image transmission method are provided.

Further, according to the present invention, there is a means for receiving a color moving image, which sequentially receives the first light color image, the second light color image, and the third light color image in frame units, and 1 In the current frame in which only the light-colored image of the type is received, the means for acquiring the interpolated image of the other two types of the light-colored image that has not been received by motion compensation, and the two types of the interpolated image obtained respectively. A means for acquiring two types of difference images by subtracting the light-colored image received in the current frame, and after removing noise from each of the two types of acquired difference images, the two types are used. A means for acquiring two types of corrected interpolated images by adding the light-colored image received in the current frame to each of the difference images, and the light-colored image received in the current frame and the acquired 2). A color moving image receiving device and a color moving image receiving method including means for converting a kind of corrected interpolated image into a first primary color image, a second primary color image, and a third primary color image by matrix calculation are provided. ..

Further, according to the present invention, there is provided a color moving image transmission / reception system including the color moving image transmitting device and the color moving image receiving device.

As described above, according to the present invention, in the frame sequential type moving image transmission, a configuration for performing appropriate motion estimation between frames of different colors is provided.

FIG. 1 is a diagram showing a configuration example of the color moving image transmission device of the first embodiment. FIG. 2 is a diagram showing a state of the complementary light color frame sequential of the second embodiment. FIG. 3 is a diagram showing a configuration example of the color moving image transmission device of the second embodiment. FIG. 4 is a diagram showing a configuration example of the color moving image receiving device of the third embodiment. FIG. 5 is a diagram showing a state of motion compensation color plane interpolation according to the third embodiment. FIG. 6 is a diagram showing a configuration example of the spatial filter of the third embodiment.

Hereinafter, the present invention will be described with reference to the embodiments shown in the drawings, but the present invention is not limited to the embodiments shown in the drawings. In each of the figures referred to below, the same reference numerals are used for common elements, and the description thereof will be omitted as appropriate.

<First Embodiment>
The color moving image transmission device according to the first embodiment of the present invention will be described. FIG. 1 shows the configuration of the color moving image transmission device of the present embodiment. In FIG. 1, the red plane R image signal coming from the R image input 1 is temporarily held in the R image buffer 4 and output at a timing corresponding to a request on the receiving side. Similarly, the green plane G image signal coming in from the G image input 2 is held in the G image buffer 5, and the blue plane B image signal coming in from the B image input 3 is held in the B image buffer 6. Each is output at a predetermined timing. The capacity of each buffer is small if the R, G, and B signals are input completely in parallel, and there is almost no delay due to input / output. If the RGB signal is input serially, one frame is stored and processing is performed after all the signals are prepared, so that the capacity and delay for one frame are generated. In the following, the three types of primary color images "R image", "G image", and "B image" may be simply expressed as "R", "G", and "B".

The white image former 7 receives the R, G, and B image signals in synchronization, and adds the three values to obtain the white image W. The frame selector 8 selects the output of the R image buffer 4, the output of the G image buffer 5, and the output of the B image buffer 6 in frame units and gives them to the multiplier 9. The multiplier 9 multiplies the selected image signal of any of R, G, and B by a predetermined numerical value and gives it to the subtractor 10. The subtractor 10 subtracts the signal from the multiplier 9 from the white image W given by the white image former 7.

The image formed is a complementary light color to pure white. The one with R reduced is called A (Aqua) with bright cyan, the one with G reduced is called V (Violet) with bright magenta, and the one with B reduced is called E (Lemon) with bright yellow. In Lemon, Lime or Light Green was L, so the second letter E was used to distinguish them. These are determined in the present embodiment so as to have different alphabets from R, G, B, W and Y, M, C, K, but they also exist as color names.

That is, in the present embodiment, the three types of primary color images are weighted and added so that the addition ratio of the first primary color image (R) is lower than that of the remaining primary color images (G, B). (Complementary color light color image A) is generated, and the addition ratio of the second primary color image (G) is lower than that of the remaining primary color images (R, B) of the three types of primary color images. A second light-colored image (complementary-colored light-colored image V) is generated by weighting and adding, and three types of primary-colored images are further added to the third primary-colored image (B) with the addition ratio of the remaining primary-colored images ( A third light-colored image (complementary-colored light-colored image E) is generated by weighting and adding so as to be lower than that of R and G).

The above processing is expressed by an expression. First, white W is expressed by the following equation.

Assuming that the ratio of subtracting the addition ratio is c (0 to 1.0), the light-colored image signals A, V, and E are given by the following equations.

The normalized signal amplitude is represented by a matrix as follows.

When c = 0.5, the following equation is obtained.

If the rate of subtraction is increased and c = 2/3, the following equation is obtained.

If we increase it further and set c = 0.75, we get the following equation.

When c = 1.0, one color disappears completely, so that it becomes a pure complementary color (C, M, Y).

As described above, in the present embodiment, the three types of primary color images are weighted and added so that the addition ratio of the first primary color image (R) is lower than that of the remaining primary color images (G, B). , A first light color image (complementary light color image A) is generated, and three types of primary color images are added to those of the other primary color images (R, B) with the addition ratio of the second primary color image (G). A second light color image (complementary color light color image V) is generated by weighting and adding so as to be lower, and three types of primary color images are further added with the addition ratio of the third primary color image (B) remaining. A third light color image (complementary light color image E) is generated by weighting and adding so as to be lower than that of the primary color images (R, G).

The complementary light-colored frame sequential (FS) image obtained in this manner becomes an image signal (light-colored image signals A, V, E) as shown in FIG. 2, and is given to the FS image encoder 11. .. The FS image encoder 11 encodes an FS image signal according to a transmission line, and in the simplest case, only synchronous formation and parity addition are performed. For frame-by-frame compression, you can use normal encoding monochromatic (4: 0: 0) modes such as JPEG and AVC intra.

In the case of high compression, it is necessary to perform motion compensation inter-frame prediction coding dedicated to the FS image. At that time, the method of forming the prediction signal between the different color planes is different from the case of the primary colors (R, G, B). Further, since many of the components are common, the correlation between images between the color planes becomes high, and the motion estimation processing between different colors becomes easy. The obtained light-colored frame sequential moving image information is output from the FS image information output 12 and transmitted through various transmission lines.

<Second embodiment>
A color moving image transmission device according to a second embodiment of the present invention will be described. FIG. 3 shows the configuration of the color moving image transmission device of the present embodiment, and the same components as those of the first embodiment of FIG. 1 are designated by the same number. FIG. 3 has a matrix 21 instead of the white image former 7 and the multiplier 9 as compared to FIG. Further, since the frame selector 22 is for a light-colored image, the number of processing bits and the like are slightly different from those of the frame selector 8 of FIG.

In the second embodiment, the method of forming the light color plane is different from that of the first embodiment, that is, R image input 1, G image input 2, B image input 3, R image buffer 4, G image buffer 5, and B image. The buffer 6 is basically the same as in the first embodiment.

In FIG. 3, the matrix 21 simultaneously receives the pixel values of all color planes of the same pixel, and the three values of R, G, and B (primary colors) are weighted and added by matrix calculation to obtain the three values of A, V, and E. .. It is also conceivable that R, G, and B are weighted and added to bring the brightness Y closer to the brightness Y instead of the white W. This can also be realized by changing the coefficient value of the matrix. Let the approximate luminance component Y'multiplied by 1.2 be the following equation.

Subtracting R, G, B multiplied by 0.2 from Y'will give the following equation.

Moreover, since V is close to the brightness Y, if Y itself is used, the following equation is obtained.

As described above, in the present embodiment, the three types of primary color images are weighted and added so that the addition ratio of the first primary color image (R) is lower than the ratio of the first primary color (R) in the brightness component. , A first light color image (complementary light color image A) is generated, and the addition ratio of the second primary color image (G) is the ratio of the second primary color (G) to the brightness component of the three types of primary color images. A second light color image (complementary color light color image V) is generated by weighting so as to be lower, and three types of primary color images are further added, and the addition ratio of the third primary color image (B) is the brightness component. A third light color image (complementary color light color image E) is generated by weighting and adding so as to be lower than the ratio of the third primary color (B).

The frame selector 22 selects the A image, the V (Y) image, and the E image, which are the outputs of the matrix, in frame units. FIG. 5 shows the state of the light-colored frame sequential image signal obtained in this manner.

The FS image encoder 11 is the same as the first embodiment up to frame-by-frame compression. In motion compensation interframe prediction coding, the prediction signal formation method between different color planes is changed according to the matrix.

<Third embodiment>
A color moving image receiving device according to a third embodiment of the present invention will be described. The color moving image receiving device of the present embodiment has three types of complementary light color images (A, V, E) transmitted from the color moving image transmitting device of the first or second embodiment described above as three primary colors. A device that converts an image (R, G, B), and the combination of the color moving image transmitting device described above and the color moving image receiving device described below is conceived as the color moving image transmitting / receiving system of the present invention.

FIG. 4 shows the configuration of the color moving image receiving device of the present embodiment. In FIG. 4, in the light-colored frame sequential color images (A, V, E) coming in from the FS image input 31, one color plane is stored in the new image memory 32 for one frame. At the same time, the color plane one frame before, which has been stored in the new image memory until then, moves to the current image memory 33. Further, the color plane two frames before, which has been stored in the current image memory until then, is moved to the old image memory 34. As a result, three types of color planes of three consecutive frames are aligned in each memory. From each memory, the image signal of each color plane is output at the timing according to the request of the receiving side.

<Inter-frame processing>
Motion compensation interpolation between frames and motion estimation processing for that purpose will be described. The relationship between the frame and the color plane here is shown in FIG. In the adjacent interpolation of the figure (a) using only one-way frames, the missing color E of the four frames in which the existing image is A is interpolated from the previous three frames, and the missing color V is interpolated from the latter five frames. FIG. 4 shows this process, but in order to deal with complicated image changes such as occlusion, interpolation interpolation in (b) in the figure is performed using frames in both directions. In this case, the missing color V of 12 frames in which the existing image is E is interpolated from the previous 11 frames and the subsequent 14 frames. Then, the missing color A is interpolated from the front 10 frames and the rear 13 frames. The mixing ratio of two images in interpolation interpolation is changed by image correlation.

In FIG. 4, the back motion estimator 35 obtains the motion vector of the image stored in the new image memory with respect to the image of the interpolated frame (current frame) stored in the current image memory 33. The forward motion estimator 36 obtains the motion vector of the image stored in the old image memory with respect to the current frame image stored in the current image memory 33. The motion vector obtained by the back motion estimator 35 is given to the back motion compensator 37. The motion vector obtained by the forward motion estimator 36 is given to the forward motion compensator 38. This motion estimation is intercolor processing, but since most of the color components are common between frames and the correlation between images is high, an appropriate motion vector is required.

The back motion compensator 37 motion compensates the image stored in the new image memory 32, and gives the obtained first interpolated image to the subtractor 39. The forward motion compensator 38 motion compensates the image stored in the old image memory 34, and gives the obtained second interpolated image to the subtractor 40. The specific color changes sequentially depending on the frame, but when the current frame is V, the first interpolated image is E and the second interpolated image is A. As a result, a missing color plane is obtained, and at this stage, three types of color planes including the existing color plane are prepared. However, since complete interpolation cannot be performed due to motion compensation, in-frame processing is continuously performed.

<In-frame processing>
In-frame processing is nothing but prediction processing between colors. Each color plane has a different value in the colored part, but the change in color is not as drastic as the change in brightness (white component). In other words, the correlation for spatial changes is quite high. On the other hand, the missing image reconstructed by motion compensation frame-to-frame interpolation is generally correct, but due to the performance limit of motion compensation, slight deviation and distortion occur. Therefore, in the present embodiment, deviation and distortion are reduced by obtaining a residual between colors in the same frame and removing isolated point noise (isolated changing component) of the residual.

The subtractor 39 subtracts an existing image of a color plane different from the interpolated image of a certain color plane to obtain a first difference image, and causes the spatial filter 41 to act on the first difference image. In the subtractor 40, the existing image is subtracted from the interpolated image of a different color plane to obtain a second difference image, and the spatial filter 42 is operated. Specifically, when the current frame is V, the first difference image is EV and the second difference image is AV.

The spatial filters 41 and 42 basically have the same processing operation and differ only in the target signal. The specific treatment is a median (intermediate value) filter or the like that is effective in removing isolated components. The number of reference pixels is set to about 5 × 5 pixels because the effect is low in the peripheral 3 × 3 pixels. As a result, edge deviations that are likely to occur in motion compensation are greatly reduced. Here, in the present embodiment, the intensity of the spatial filter (41, 42) is adaptively controlled according to the amount of matching error in the motion vector obtained by the motion estimator (35, 36). Specifically, the smaller the matching error, the weaker the strength of the spatial filter, and the larger the matching error, the stronger the strength of the spatial filter.

<Spatial filtering>
The configuration of the spatial filter in this case is shown in FIG. The signal input from the subtractor (39,40) through the input signal terminal 51 is given to the 5 × 5 pixel median filter 53, the 3 × 3 pixel median filter 54, and the multiplier 60. The 5 × 5 pixel median filter 53 transfers the intermediate value of 25 pixels of peripheral 5 × 5 including the target pixel to the multiplier 55, and the 3 × 3 pixel median filter 54 transfers the intermediate value of 9 pixels of peripheral 3 × 3 to the multiplier 55. Give to the multiplier 56.

The multiplier 55 multiplies α (0 to 1) and outputs it to the adder 57, and the multiplier 56 multiplies it by (1-α) and outputs it to the adder 57. The adder 57 adds both values and gives them to the multiplier 59. The multiplier 59 multiplies β (0 to 1) and outputs it to the adder 61, and the multiplier 60 multiplies it by (1-β) and outputs it to the adder 61. The adder 61 adds both values, and the final result obtained is output from the signal output 62. The values of α and β are given by the filter intensity controller 58.

In the filter strength controller 58, the values of α and β change within the limit range (0 to 1.0) depending on the matching error amount of each motion compensation block input from the motion estimator (35, 36) through the error amount input terminal 52. And give to each multiplier. The values of α and β are increased in proportion to the amount of error. This process also has a noise reduction effect, and the edges are retained even after the process, so there is little need to completely eliminate filtering. That is, the minimum value of β may be about 0.5.

The first difference image corrected by the spatial filter 41 is given to the adder 43. The second difference image corrected by the spatial filter 42 is given to the adder 44. The adder 43 and the adder 44 add the corrected difference image and the existing color plane image of the current frame, and give each of the obtained corrected interpolated images to the inverse matrix 45.

As described above, the filter acts on the isolated point noise on the difference image between the interpolated image and the existing image. Since the interpolated image and the existing image have essentially the same white component, the difference image becomes a color difference component. When the motion compensation functions properly, the color difference component is only the original color change, and the color change itself is gradual, so that the change of the difference signal is also gradual. On the other hand, if there is a deviation in the interpolated image, the deviation appears strongly in the difference signal. Since this component appears in isolation regardless of the original color change, it is possible to significantly suppress the color difference error caused by motion compensation by removing it.

<Inverse conversion>
The inverse matrix 45 obtains an existing image together with both interpolated images and converts them into R, G, B images. Since the specific color changes sequentially depending on the frame, it is necessary to switch the matrix according to the relationship of the input colors.

The inverse matrix 45 undergoes matrix conversion from A, V, E to R, G, B. This is the inverse conversion of the conversion from R, G, B to A, V, E, and the one corresponding to Eq. (5) is expressed by the following equation.

The inverse transformation corresponding to equation (6) with c = 0.5 is as follows.

The inverse transformation corresponding to equation (7) with c = 2/3 is as follows.

The inverse transformation corresponding to equation (8) with c = 0.75 is as follows.

The signal of the present embodiment is transmitted by superimposing a white component and a color difference component. Therefore, the level (amplitude) of each component is lowered as compared with the case where each component is transmitted independently. The relationship between the degree and c does not change with c for the white component W, as shown in the following equation, and is equal to the primary color.

As for the color difference component, taking R-G as an example, the difference value is multiplied by (3-c) / c in the inverse conversion as shown in the following equation.

Specifically, c = 0.5 is 5 times, c = 2/3 is 7/2 times, c = 0.75 is 3 times, and c = 1.0 is 2 times, and the influence of errors caused by transmission is likely to appear. However, since the luminosity factor for the color difference component error is considerably lower than the luminosity factor for the luminance component error, the image quality when c is close to 1 matches the visual characteristics as it is. Moreover, since the color sensitivity to a high spatial frequency is significantly low with respect to the color difference component, c <0.75 is also possible on the premise that noise reduction processing is applied to the color difference component. When c <0.5, the magnification is larger than 5, so the color difference noise becomes noticeable, which is not realistic.

In the second embodiment, the inverse transformation of Eq. (9) approaching the brightness is given by the following equation.

The inverse transformation of Eq. (10) with V as Y is as follows.

<Comparison with the conventional method>
In this embodiment, since the white (luminance) component is sent in all frames, it can be said that it is closer to a composite signal in which color difference information is superimposed on the luminance rather than the frame sequential of the primary colors (R, G, B). However, since there is no processing at a spatial frequency unlike a composite signal, there is no decrease in spatial resolution. For the frame sequential of the primary colors (R, G, B), the advantages remain the same and the problems are solved.

Table 1 compares the characteristics of the composite signal (NTSC), the component signal (4: 2: 0), the primary color frame sequential, and the light color frame sequential of the present embodiment. In the table, the number of (transmission) channels is similar to the number of planes. The color period must maintain the phase when trying to edit a moving image, and NTSC has 2 frames (4 fields because it is interlaced). The relative number of samples is a relative value with only one color as 1.0. The characteristics related to resolution and motion compensation are as described above.

As described above, the present invention includes a light color image in which the ratio of the first primary color image is low, a light color image in which the ratio of the second primary color image is low, and a third primary color image out of three types of primary color images. Light-colored images with a low proportion are obtained, and one of them is sequentially selected in frame units and sent in frame order. Therefore, in motion estimation for motion compensation interframe prediction coding and motion compensation interpolation of missing color planes, many of the components contained in the image signal are common to each color even if the image content is highly saturated. Since the correlation between images is high, motion estimation becomes easy. The obtained image signal has less noise of the luminance or white component, and the coding efficiency is improved when the motion-compensated image-to-image coding is transmitted.

On the other hand, since the level of the color difference component is lowered and multiplexed and transmitted, the error of the color difference increases as it is, but the isolated component for the color difference is effectively removed in reception, which is suitable for the subjective image quality. Good image quality can be reproduced.

Although the present invention has been described above with embodiments, the present invention is not limited to the above-described embodiments, and the actions and effects of the present invention can be exhibited within the scope of other embodiments that can be conceived by those skilled in the art. As long as it works, it is included in the scope of the present invention.

1 ... R image input, 2 ... G image input, 3 ... B image input, 4 ... R image buffer, 5 ... G image buffer, 6 ... B image buffer, 7 ... White image former, 8, 22 ... Frame selector , 9, 55, 56, 59, 60 ... Multiplier, 10 ... Subtractor, 11 ... FS image encoder, 12 ... FS image information output, 21 ... Matrix, 31 ... FS image input, 32 ... New image memory, 33 ... current image memory, 34 ... old image memory, 35 ... backward motion estimator, 36 ... forward motion estimator, 37 ... backward motion compensator, 38 ... forward motion compensator, 39, 40 ... subtractor, 41, 42 ... Spatial filter, 43, 44, 57, 61 ... Adder, 45 ... Inverse matrix, 51 ... Input signal terminal, 52 ... Error amount input terminal, 53 ... 5 x 5 pixel median filter, 54 ... 3 x 3 pixel median filter , 58 ... Filter strength controller, 62 ... Signal output

Claims (8)

A device that transmits color moving images
A means for sequentially acquiring the first primary color image, the second primary color image, and the third primary color image in frame units, and
A means for generating a first light-colored image by weight-adding the acquired three types of primary color images so that the addition ratio of the first primary color image is lower than that of the remaining primary color images.
A means for generating a second light-colored image by weight-adding the acquired three types of primary color images so that the addition ratio of the second primary color image is lower than that of the remaining primary color images.
A means for generating a third light-colored image by weight-adding the acquired three types of primary color images so that the addition ratio of the third primary color image is lower than that of the remaining primary color images.
A means for sequentially transmitting the generated first light-color image, the second light-color image, and the third light-color image in frame units, and
Color video transmission equipment including. A device that transmits color moving images
A means for sequentially acquiring the first primary color image, the second primary color image, and the third primary color image in frame units, and
The acquired three types of primary color images are weighted and added so that the addition ratio of the first primary color image is lower than the ratio of the first primary color in the luminance component of the first light color image to generate the first light color image. Means to do and
The acquired three types of primary color images are weighted and added so that the addition ratio of the second primary color image is lower than the ratio of the second primary color in the luminance component of the second light color image to generate the second light color image. Means to do and
The acquired three types of primary color images are weighted and added so that the addition ratio of the third primary color image is lower than the ratio of the third primary color in the luminance component of the third light color image to generate the third light color image. Means to do and
A means for sequentially transmitting the generated first light-color image, the second light-color image, and the third light-color image in frame units, and
Color video transmission equipment including. A device that receives color moving images
A means for sequentially receiving the first light-colored image, the second light-colored image, and the third light-colored image according to claim 1 or 2 in frame units.
Means for acquiring an interpolated image of the two types of the light-colored image by motion compensation using the other two types of the light-colored image of the frame before and after the frame in the current frame in which only one type of the light-colored image is received. When,
Means for obtaining two types of differential image the light color image received by the current frame from, respectively Re its the obtained two types of the interpolation image is subtracted,
After removing the isolated point noise by applying the spatial filter to the acquired two types of the difference image of their respective, the light color image received by the current frame to the two types of the difference image of their respective To obtain two types of corrected interpolated images by adding
A means for converting the light-color image received in the current frame and the acquired two types of corrected interpolated images into a first primary color image, a second primary color image, and a third primary color image by matrix calculation.
Color video receiver including. It is characterized in that the intensity of the spatial filter is adaptively controlled according to the amount of matching error of the motion vector related to the motion compensation.
The color moving image receiving device according to claim 3. The color moving image transmission device according to claim 1 or 2,
The color moving image receiving device according to claim 3 or 4,
A color moving image transmission / reception system consisting of. It is a method of transmitting color moving images.
A step of sequentially acquiring a first primary color image, a second primary color image, and a third primary color image in frame units, and
A step of generating a first light-colored image by weight-adding the acquired three types of primary color images so that the addition ratio of the first primary color image is lower than that of the remaining primary color images.
A step of generating a second light-colored image by weight-adding the acquired three types of primary color images so that the addition ratio of the second primary color image is lower than that of the remaining primary color images.
A step of generating a third light-colored image by weight-adding the acquired three types of primary color images so that the addition ratio of the third primary color image is lower than that of the remaining primary color images.
A step of sequentially transmitting the first light-color image, the second light-color image, and the third light-color image in frame units, and
Color video transmission methods including. It is a method of transmitting color moving images.
A step of sequentially acquiring a first primary color image, a second primary color image, and a third primary color image in frame units, and
The acquired three types of primary color images are weighted and added so that the addition ratio of the first primary color image is lower than the ratio of the first primary color in the luminance component of the first light color image to generate the first light color image. Steps to do and
The acquired three types of primary color images are weighted and added so that the addition ratio of the second primary color image is lower than the ratio of the second primary color in the luminance component of the second light color image to generate the second light color image. Steps to do and
The acquired three types of primary color images are weighted and added so that the addition ratio of the third primary color image is lower than the ratio of the third primary color in the luminance component of the third light color image to generate the third light color image. Steps to do and
A step of sequentially transmitting the generated first light-color image, the second light-color image, and the third light-color image in frame units, and
Color video transmission methods including. It is a method of receiving color moving images.
A step of sequentially receiving the first light-colored image, the second light-colored image, and the third light-colored image according to claim 6 or 7 in frame units.
Means for acquiring an interpolated image of the two types of the light-colored image by motion compensation using the other two types of the light-colored image of the frame before and after the frame in the current frame in which only one type of the light-colored image is received. When,
Obtaining two types of difference images by subtracting the light color image received by the current frame from, respectively Re its the obtained two types of the interpolation image,
After removing the isolated point noise by applying the spatial filter to the acquired two types of the difference image of their respective, the light color image received by the current frame to the two types of the difference image of their respective And the step of acquiring two types of corrected interpolated images by adding
A step of converting the light color image received in the current frame and the acquired two types of corrected interpolated images into a first primary color image, a second primary color image, and a third primary color image by matrix calculation.
Color video receiving method including.