JP2005311667A - Video format converter and video format inverse converter, and video format conversion program and video format inverse conversion program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video format converter, a video format inverse converter, a video format conversion program and a video format inverse conversion program which make it possible to perform processing in a video processor for processing video signals expressed by the luminance signals and color difference signals of the conventional square lattice pixel structure, while maintaining the horizontal resolution and vertical resolution of three primary color video signals including the green signals of an orthorhombic lattice pixel structure without increasing a pixel rate. <P>SOLUTION: The video format converter 1 converts the video signals of a three primary color form to the video signals of a luminance / color difference form and is provided with a first luminance pixel generation means 3, a second luminance pixel generation means 5, a blue color difference pixel generation means 7, a red color difference pixel generation means 9, and a scanning conversion means 11. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a video format conversion device and a video format conversion program for converting a video signal of the three primary colors having an oblique lattice pixel structure into a video signal of luminance / color difference format, a video format reverse conversion device and a video format reverse conversion for reverse conversion. Concerning conversion program.

  In general, rhombic sampling of a video signal is known as a technique for maintaining horizontal and vertical resolution (horizontal and vertical resolution) while reducing the diagonal resolution of the displayed video. Yes. For example, in a 4000-class video shooting and display system (see Non-Patent Document 1), a green signal with an orthorhombic lattice sampling structure, a blue signal with a square lattice sampling structure with half the number of pixels of this green signal, and the same green A red signal having a square lattice sampling structure is used with half the number of pixels of the signal.

  The reason why the sampling structure is different between the green signal, the blue signal, and the red signal is that the human visual characteristics are taken into consideration and the video signal is expressed with a smaller number of pixels while increasing the resolution of the green signal. Because.

  By the way, conventionally, the three primary color signals of the three primary colors of green, blue, and red are often converted into a video signal expressed by a luminance signal and a color difference signal sampled by a square lattice. This conversion is performed in order to save the transmission band and the recording band by utilizing the human visual characteristic that it is difficult to detect even if the band of the color difference signal is narrower than the band of the luminance signal.

  In digital compression encoding of video signals, video signals expressed by luminance signals and color difference signals are often used as encoded video formats.

  Conventionally, in order to process a three-primary-color video signal including a green signal having an orthorhombic-grid sampling structure by a video processing device that processes a video signal expressed by a luminance signal and a color-difference signal sampled by a square lattice, the three-primary-color image In general, each pixel of a signal is interpolated and converted into a square lattice sampling structure (see Non-Patent Document 2).

STRL R & D NHK (Japan Broadcasting Corporation) January 2004 (Vol.83), “4000-scanning 4-plate ultra-high definition video camera” (pages 44-51), “Development of ultra-high-definition display” (page 36-43) Takahiko Fukiki “Multidimensional Signal Processing of TV Images” (ISBN4-526-024414-04) Figure 3.34 Image Conversion in Offset Sampling Band Compression (November 15, 1988, Nikkan Kogyo Shimbun, page) 110)

  However, when each pixel of the three primary color video signals including the green signal of the orthorhombic lattice sampling structure is interpolated and converted to the square lattice sampling structure, the pixel rate (the total number of pixels per unit screen (one frame)) is doubled. There is a problem that the hardware scale is doubled in order to process a video signal of this pixel rate.

  In addition, if an attempt is made to convert a green signal with an orthorhombic lattice sampling structure into a green signal with a tetragonal lattice sampling structure without changing the pixel rate, the horizontal resolution and the vertical resolution must be reduced. In addition, there is a problem that the purpose of the orthorhombic lattice sampling structure used for maintaining the vertical resolution is impaired.

  Therefore, the present invention solves the above-described problem and maintains the horizontal and vertical resolutions of the three primary color video signals including the green signal of the rhombic sampling structure without increasing the pixel rate, while maintaining the conventional square lattice sampling. Video format conversion device, video format reverse conversion device, video format conversion program, and video format reverse conversion that can be processed by a video processing device that processes a video signal expressed by the luminance signal and the color difference signal The purpose is to provide a program.

  In order to solve the above-mentioned problem, the video format conversion device according to claim 1 includes a green signal having an oblique lattice pixel structure, a red signal and a blue signal having a square lattice pixel structure, and the green signal per unit area. A three primary color video signal composed of two pixels, a first green pixel and a second green pixel, which is a pixel, a red pixel which is a pixel of the red signal, and a blue pixel which is a pixel of the blue signal, A video format conversion device that converts a color difference video signal into a first luminance pixel generation unit, a second luminance pixel generation unit, a blue color difference pixel generation unit, a red color difference pixel generation unit, and a scan conversion unit And a configuration comprising:

  According to this configuration, the video format conversion device generates the first luminance pixel from the first green pixel, the red pixel, and the blue pixel in the unit area by the first luminance pixel generation unit. The unit area is a minimum area that expresses various colors using the three primary colors of light, which includes two green pixels, one blue pixel, and one red pixel. Subsequently, the video format conversion device generates a second luminance pixel from the second green pixel, the red pixel, and the blue pixel in the unit area by the second luminance pixel generation unit. The generation of the first luminance pixel and the second luminance pixel is performed based on a conversion formula set in advance in each of the first luminance pixel generation unit and the second luminance pixel generation unit.

  Also, the video format conversion device uses the blue color difference pixel generation means to generate a blue color difference pixel in a luminance / color difference type video signal from two green pixels of the first green pixel and the second green pixel, and the red pixel and the blue pixel. And the red color difference pixel generating means generates a red color difference pixel in the luminance / color difference type video signal from the two green pixels of the first green pixel and the second green pixel, and the red pixel and the blue pixel. The blue color difference pixel and the red color difference pixel are generated based on a conversion formula set in advance in each of the blue color difference pixel generation unit and the red color difference pixel generation unit.

  The video format conversion device scan-converts the first luminance pixel generated by the first luminance pixel generation unit and the second luminance pixel generated by the second luminance pixel generation unit by the scan conversion unit, Luminance pixels of a luminance / color difference format video signal are generated. Note that the scan conversion is to change the order in which the pixels are scanned, and the scan conversion by the scan conversion means reads the first luminance pixel and the second luminance pixel alternately for each pixel.

  That is, in this video format conversion apparatus, the luminance pixel (Y pixel) is set to the position in the unit area of the green pixel (original G pixel), and the position in the unit area of the blue pixel (original B pixel) is set. Thus, a blue color difference pixel (Cb pixel) and a red color difference pixel (Cr pixel) are generated for each position in the unit area of the red pixel (original R pixel). In addition, in the state of the first luminance pixel and the second luminance pixel, the pixel structure has an orthorhombic lattice pixel structure (orthogonal lattice sampling structure). When the first luminance pixel and the second luminance pixel (adjacent in the oblique direction) are scan-converted by the scan conversion means, the first luminance pixel and the second luminance pixel are arranged horizontally. One luminance pixel and second luminance pixel are alternately read out for each pixel and subjected to scanning conversion, and converted into a video format of a luminance / color difference format video signal having a square lattice pixel structure (square lattice sampling structure).

  2. The video format conversion device according to claim 2, wherein the blue color difference pixel scanning conversion means for scanning and converting the blue color difference pixel and the red color difference pixel for scanning and converting the red color difference pixel in the video format conversion device according to claim 1. Scanning conversion means.

  According to this configuration, the video format conversion device scan-converts the blue color difference pixels by the blue color difference pixel scan conversion unit, and scan-converts the red color difference pixels by the red color difference pixel scan conversion unit. Here, the scan conversion means performs the scan conversion on the assumption that the luminance pixels (first luminance pixel, second luminance pixel) are arranged vertically. That is, the first luminance pixel is read out for each line so that one line is read out to be one line, and then the second luminance pixel is read out for one line to be the next line. Corresponding to this luminance pixel scan conversion, the blue color difference pixel scan conversion means and the red color difference pixel scan conversion means assume that two adjacent pixels of the blue color difference pixel and the red color difference pixel are arranged vertically. Scan conversion is performed. That is, every other pixel is distributed to two lines. As a result, it is converted into a video format of a video signal of luminance / color difference format having a square lattice sampling structure.

  The video format conversion apparatus according to claim 3, further comprising a blue pixel interpolation means for interpolating the blue pixels and a red pixel interpolation means for interpolating the red pixels. The blue pixel and the red pixel that have been input are input to the first luminance pixel generation unit, the second luminance pixel generation unit, the blue color difference pixel generation unit, and the red color difference pixel generation unit.

  According to this configuration, the video format conversion apparatus interpolates blue pixels by the blue pixel interpolation means and interpolates red pixels by the red pixel interpolation means. That is, the blue pixel interpolation unit and the red pixel interpolation unit interpolate the blue pixel and the red pixel so that the horizontally adjacent blue pixel and the red pixel are vertically offset from each other. In the video format conversion device, the blue color difference pixel and the red color difference pixel generation unit generate a blue color difference pixel and a red color difference pixel for the offset blue pixel and red pixel in the unit area, respectively. . Further, the video format conversion apparatus reads out the first luminance pixel for one line to be one line by assuming that the luminance pixels adjacent in the oblique direction are vertically arranged by the scanning conversion means, and then the second luminance pixel. Are read out alternately for each line so that the next line is read out for one line. Further, the blue color difference pixel scan conversion unit and the red color difference pixel scan conversion unit allocate the blue color difference pixels and the red color difference pixels adjacent to each other in the diagonal direction to be arranged in two lines every other pixel. Scan conversion is performed. Thus, the image signal is converted into a luminance / color difference format video signal having a square lattice sampling structure. Further, here, when the luminance pixel is generated by the blue pixel interpolation unit and the red pixel interpolation unit, the blue pixel and the red pixel after being interpolated are used.

  The video format conversion device according to claim 4 is the video format conversion device according to claim 3, wherein the first luminance pixel generation unit and the second luminance pixel generation unit include the blue pixel interpolation unit and the red pixel. A blue pixel and a red pixel before being interpolated by the interpolation means are input.

  According to such a configuration, the video format conversion device includes the blue pixel and the red pixel before the blue pixel and the red pixel are interpolated by the blue pixel interpolation unit and the red pixel interpolation unit in the video format conversion device according to claim 3. In use, the first luminance pixel and the second luminance pixel generation unit generate the first luminance pixel and the second luminance pixel.

  6. The video format inverse conversion device according to claim 5, comprising a green signal having an orthorhombic lattice pixel structure, a red signal and a blue signal having a square lattice pixel structure, and a first green which is a pixel of the green signal per unit area. A luminance / color-difference-format video signal from a three-primary-color video signal consisting of two pixels, a second green pixel, a red pixel that is the red signal pixel, and a blue pixel that is the blue signal pixel A video format inverse conversion device for inversely converting a converted video signal converted into a video signal of a three-primary color format having an orthorhombic lattice pixel structure, comprising: a scan conversion means, a first green pixel generation means, and a second green color The pixel generation unit, the blue pixel generation unit, and the red pixel generation unit are provided.

  According to such a configuration, the video format inverse conversion device scan-converts the luminance pixel that is the pixel of the luminance signal of the luminance / color-difference video signal by the scan conversion unit, and the first luminance pixel that is a result of the scan conversion. And the second luminance pixel are output. In other words, the pixel structure of the luminance pixel is converted from the square lattice sampling structure to the orthorhombic lattice sampling structure by this scanning conversion means.

  Subsequently, the video format reverse conversion device includes a first luminance pixel and a second luminance pixel which are output after being scanned and converted by the first green pixel generation unit, and a blue signal of the luminance / color difference format video signal. A first green pixel is generated from a blue color difference pixel which is a pixel of a color difference signal and a red color difference pixel which is a pixel of a red color difference signal of a luminance / color difference format video signal. A second green pixel is generated from the luminance pixel, the second luminance pixel, the blue color difference pixel, and the red color difference pixel. The generation of the first green pixel and the second green pixel is performed based on a conversion formula set in advance in each of the first green pixel generation unit and the second green pixel generation unit.

  The video format inverse conversion device generates a blue pixel from the first luminance pixel, the second luminance pixel, the blue color difference pixel, and the red color difference pixel by the blue pixel generation unit, and the first pixel generation unit generates the blue pixel from the first luminance pixel and the second luminance pixel. A red pixel is generated from the luminance pixel, the second luminance pixel, the blue color difference pixel, and the red color difference pixel. The generation of the blue pixel and the red pixel is performed based on a conversion formula set in advance in each of the blue pixel generation unit and the red pixel generation unit.

  A video format reverse conversion device according to a sixth aspect is the video format reverse conversion device according to the fifth aspect, further comprising a blue color difference pixel scan conversion unit and a red color difference pixel scan conversion unit.

  According to such a configuration, the video format inverse conversion device scans and converts the blue color difference pixels, which are the pixels of the blue color difference signal of the luminance / color difference format video signal, by the blue color difference pixel scan conversion means, and performs the red color difference pixel scan conversion. By means of the means, the red color difference pixel which is the pixel of the red color difference signal of the luminance / color difference format video signal is scan-converted. That is, the blue color difference pixel scan conversion unit and the red color difference pixel scan conversion unit convert the pixel structure of the blue color difference pixel and the red color difference pixel into a color difference signal pixel structure corresponding to the luminance signal of the rhombic pixel structure. . Thereafter, the video format inverse conversion device uses the blue color difference pixel and the red color difference pixel converted into the pixel structure to generate the blue pixel and the red pixel by the blue pixel generation unit and the red pixel generation unit.

  According to a seventh aspect of the present invention, there is provided the video format inverse conversion device according to the sixth aspect, further comprising a blue pixel interpolation unit and a red pixel interpolation unit.

  According to such a configuration, the video format inverse conversion device interpolates the blue pixel and the red pixel having the offset structure by the blue pixel interpolation unit and the red pixel interpolation unit, respectively, so that the square lattice pixel structure having no offset in the vertical direction is obtained. Blue and red pixels are generated.

  9. The video format conversion program according to claim 8, comprising a green signal having an oblique lattice pixel structure, a red signal and a blue signal having a square lattice pixel structure, and a first green pixel which is a pixel of the green signal per unit area. A video signal of the three primary colors consisting of two pixels of the second green pixel, one red pixel as the red signal pixel and one blue pixel as the blue signal pixel into a luminance / color difference video signal. The conversion device is configured to function as first luminance pixel generation means, second luminance pixel generation means, blue color difference pixel generation means, red color difference pixel generation means, and scan conversion means.

  According to this configuration, the video format conversion program generates the first luminance pixel from the first green pixel, the red pixel, and the blue pixel in the unit area by the first luminance pixel generation unit. The video format conversion program generates a second luminance pixel from the second green pixel, the red pixel, and the blue pixel in the unit area by the second luminance pixel generation unit. The video format conversion program scan-converts the first luminance pixel generated by the first luminance pixel generation unit and the second luminance pixel generated by the second luminance pixel generation unit by the scan conversion unit, Luminance pixels of a luminance / color difference format video signal are generated. The video format conversion program generates a blue color difference pixel of a luminance / color difference type video signal from the first green pixel, the second green pixel, the red pixel, and the blue pixel by the blue color difference pixel generation unit, and the red color difference A pixel generation unit generates a red color difference pixel of a video signal in a luminance / color difference format from the first green pixel, the second green pixel, the red pixel, and the blue pixel.

  10. The video format inverse conversion program according to claim 9, comprising a green signal having an oblique lattice pixel structure, a red signal and a blue signal having a square lattice pixel structure, and a first green which is a pixel of the green signal per unit area. A luminance / color-difference-format video signal from a three-primary-color video signal consisting of two pixels, a second green pixel, a red pixel that is the red signal pixel, and a blue pixel that is the blue signal pixel An apparatus for inversely converting the converted video signal converted into the image signal of the three primary colors having an orthorhombic lattice pixel structure, scan conversion means, first green pixel generation means, second green pixel generation means, blue pixel generation means The red pixel generating means is configured to function.

  According to such a configuration, the video format reverse conversion program scan-converts the luminance pixel that is the pixel of the luminance signal of the luminance / chrominance format video signal by the scan conversion unit, and the first luminance pixel that is the result of the scan conversion. And the second luminance pixel are output. Subsequently, the video format reverse conversion program stores the first luminance pixel and the second luminance pixel scanned and output by the first green pixel generation unit and the blue luminance of the luminance / color difference format video signal. A first green pixel is generated from a blue color difference pixel which is a pixel of a color difference signal and a red color difference pixel which is a pixel of a red color difference signal of a luminance / color difference format video signal. A second green pixel is generated from the luminance pixel, the second luminance pixel, the blue color difference pixel, and the red color difference pixel. The video format reverse conversion program generates a blue pixel from the first luminance pixel and the second luminance pixel, the blue color difference pixel, and the red color difference pixel by the blue pixel generation unit, and the red pixel generation unit generates the first pixel. A red pixel is generated from the luminance pixel, the second luminance pixel, the blue color difference pixel, and the red color difference pixel.

  According to the first and eighth aspects of the present invention, the luminance pixel with respect to the position in the unit area of the green pixel having the rhombic lattice pixel structure, the blue color difference pixel, and the red pixel with respect to the position in the unit area of the blue pixel. When the red luminance difference pixel is generated for each position in the unit region and the first luminance pixel and the second luminance pixel of the rhombic lattice pixel structure are scan-converted by the scan conversion means, the first luminance pixel and the second luminance pixel are converted. Scanning conversion assuming that two luminance pixels are arranged horizontally, and converting to a video signal format of luminance / color difference format video signal with a square lattice pixel structure, so that the diagonal lattice pixels without increasing the pixel rate While maintaining the horizontal and vertical resolutions of the three primary color format video signals including the green signal of the structure, the scale of the hardware is increased as a video signal represented by the luminance signal and color difference signal of the conventional square lattice pixel structure It can be processed without.

  According to the second aspect of the present invention, the blue color difference pixel scan conversion unit and the red color difference pixel scan conversion unit correspond to the luminance pixel scan conversion, and the adjacent two pixels (blue color difference pixel and red color difference pixel) are detected. Since the two pixels are scan-converted as vertically arranged, and thereby converted into a square-lattice pixel structure luminance / color-difference video signal, the horizontal resolution and the pixel resolution can be increased without increasing the pixel rate. It can be processed by a conventional video processing device while maintaining the vertical resolution.

  According to the third aspect of the present invention, the blue pixel interpolation unit and the red pixel interpolation unit interpolate the blue pixel and the red pixel so that the horizontally adjacent blue pixel and the red pixel are vertically offset from each other. Then, the blue color difference pixel generation unit and the red color difference pixel generation unit generate a blue color difference pixel and a red color difference pixel with respect to the offset positions in the unit area of the blue pixel and the red pixel, respectively. Then, scanning conversion is performed assuming that the two pixels adjacent to each other of the luminance pixel of the rhombic pixel structure, the blue color difference pixel, and the red color difference pixel are vertically arranged, and the luminance / color difference type image of the square lattice pixel structure Since it is converted into a signal, it can be processed by a conventional video processing apparatus while maintaining the horizontal resolution and the vertical resolution without increasing the pixel rate.

  According to the fourth aspect of the present invention, the first luminance pixel generation unit and the first luminance pixel generation unit and the first pixel are used by using the blue pixel and the red pixel before the blue pixel and the red pixel are interpolated by the blue pixel interpolation unit and the red pixel interpolation unit. A first luminance pixel and a second luminance pixel are generated by the two luminance pixel generation means. Then, scanning conversion is performed assuming that the two pixels adjacent to each other of the luminance pixel of the rhombic pixel structure, the blue color difference pixel, and the red color difference pixel are vertically arranged, and the luminance / color difference type image of the square lattice pixel structure Since it is converted into a signal, it can be processed by a conventional video processing apparatus while maintaining the horizontal resolution and the vertical resolution without increasing the pixel rate.

  According to the fifth and ninth aspects of the invention, the pixel structure of the luminance pixel is converted from the square lattice pixel structure to the rhombic lattice pixel structure by the scan conversion means, and the first green pixel generation means and the second green pixel generation are performed. The first luminance pixel and the second luminance pixel, the blue color difference pixel, and the red color difference pixel are generated by the means, and the first luminance pixel and the second green pixel are generated by the blue pixel generation means. A blue pixel is generated from the luminance pixel, the blue color difference pixel, and the red color difference pixel, and a red pixel is generated from the first luminance pixel, the second luminance pixel, the blue color difference pixel, and the red color difference pixel by the red pixel generation unit. Generate. Therefore, it is possible to reversely convert a luminance / color difference format video signal having a square grid pixel structure processed by a conventional video processing apparatus into a three-primary color format video signal having a diagonal grid pixel structure.

  According to the sixth aspect of the present invention, the blue color difference pixel scan conversion unit and the red color difference pixel scan conversion unit convert the pixel structure of the blue color difference pixel and the red color difference pixel into a pixel corresponding to the luminance signal of the rhombic pixel structure. A blue pixel and a red pixel are generated by the blue pixel generation unit and the red pixel generation unit, using the blue color difference pixel and the red color difference pixel that have been converted into the structure and the pixel structure has been converted. Therefore, it is possible to reversely convert a luminance / color difference format video signal having a square grid pixel structure processed by a conventional video processing apparatus into a three-primary color format video signal having a diagonal grid pixel structure.

  According to the seventh aspect of the present invention, the blue pixel and the red pixel having the offset structure in the vertical direction generated by the blue pixel generation unit and the red pixel generation unit are converted into the vertical direction by the blue pixel interpolation unit and the red pixel interpolation unit. To generate a blue pixel and a red pixel having a square lattice pixel structure. As a result, a luminance / color difference format video signal having a square grid pixel structure processed by a conventional video processing apparatus can be inversely converted into a three-primary color format video signal having a diagonal grid pixel structure.

Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
Regarding the video format conversion device, four embodiments from the first embodiment to the fourth embodiment will be described, and regarding the video format reverse conversion device, three embodiments from the first embodiment to the third embodiment will be described. explain. First, the configuration of the video format conversion device and the video format reverse conversion device will be described, and then the operation of the video format conversion device and the video format reverse conversion device will be described.

<Configuration of Video Format Conversion Device, First Embodiment>
FIG. 1 is a block diagram of a video format conversion apparatus (first embodiment). As shown in FIG. 1, the video format conversion apparatus 1 (1A) is configured to input three primary color signals (G (G ₁ [first green pixel], G ₂ [second green pixel]), B [blue pixel]. , R [red pixel]) is converted into a 4: 2: 2 format video signal by the luminance signal Y and the color difference signals Cb and Cr. The first luminance pixel generating means 3 and the second luminance A pixel generation unit 5, a blue color difference pixel generation unit 7, a red color difference pixel generation unit 9, and a scan conversion unit 11 are provided.

Three primary color signals, green pixel G (first green pixel G ₁ is a green signal of orthorhombic lattice pixel structure _{[G 11, G 31, ···} , G 13 is input to the video format conversion apparatus 1 (1A), G _33, · · ·], the second green pixel _{G 2 [G 22, G 42} , ···, G 24, G 44, ···]) and the blue pixel B is a blue signal square lattice pixel structure (B ₁₂ , B ₃₂ ,..., B ₁₄ , B ₃₄ ,...) And a red pixel R (R ₂₁ , R ₄₁ ,..., R ₂₃ , R ₄₃ ,. These spatial pixel arrangements are shown in FIG. 2 (hereinafter, such a diagram is referred to as a spatial pixel arrangement diagram).

The orthorhombic lattice pixel structure (orthogonal lattice sampling structure) refers to a structure in which adjacent pixels are arranged in an oblique direction in a unit region in a spatial pixel arrangement.
The square lattice pixel structure (square lattice sampling structure) refers to a structure in which adjacent pixels in a unit region are arranged in a lattice shape (vertical and horizontal directions) in a spatial pixel arrangement.

As shown in FIG. 2, the number of green pixels G (G ₁ , G ₂ ), which are green signal pixels, is twice the number of blue pixels B, which are blue signal pixels, and It is twice the number of red pixels R as pixels, and there is one blue pixel B and one red pixel R for each green pixel G (G ₁ , G ₂ ) diagonally adjacent. Here, an area in which various colors (colors) are expressed by the green pixel G (G ₁ , G ₂ ), the blue pixel B, and the red pixel R is referred to as a unit area (in FIG. 2, surrounded by a thick line). Area).

Returning to FIG. 1, the description of the configuration of the video format conversion apparatus 1 (1A) (first embodiment) will be continued.
The first luminance pixel generation unit 3 generates a first luminance pixel Y ₁ based on the first green pixel G ₁ , the blue pixel B, and the red pixel R, and outputs the first luminance pixel Y ₁ to the scan conversion unit 11. . In the first luminance pixel generating means 3, and the expression of Y ₁ in the formula of the conversion formula described below (1) is adopted, the first luminance pixel Y ₁ is required.

The second luminance pixel generation unit 5 generates a second luminance pixel Y ₂ based on the second green pixel G ₂ , the blue pixel B, and the red pixel R, and outputs the second luminance pixel Y ₂ to the scan conversion unit 11. . In this second luminance pixel generating means 5, and the expression of Y ₂ in the formula of the conversion formula described below (1) is adopted, the second luminance pixel Y ₂ are required.

The blue color difference pixel generation means 7 generates a blue color difference pixel Cb based on the first green pixel G ₁ , the second green pixel G ₂ , the blue pixel B, and the red pixel R. In the blue color difference pixel generation means 7, the blue color difference pixel Cb is obtained by using the formula Cb in the following formula (1) of the conversion formula.

The red color difference pixel generation means 9 generates a red color difference pixel Cr based on the first green pixel G ₁ , the second green pixel G ₂ , the blue pixel B, and the red pixel R. In the red color difference pixel generating means 9, the red color difference pixel Cr is obtained by using the formula of Cr in the formula (1) of the conversion formula described later.

The first luminance pixel generation unit 3, the second luminance pixel generation unit 5, the blue color difference pixel generation unit 7, and the red color difference pixel generation unit 9 convert the three primary color signals (G [G ₁ , G ₂ ] BR) into luminance signals. And a conversion matrix for converting into color difference signals.

  In Equation (1), the coefficients g, b, and r are set to g = 0.7152, b = 0.0722, and r = 0.2126 with reference to the luminance / color difference signal equation of HDTV. It is not limited to.

That is, the first luminance pixel generation unit 3 generates the first luminance pixel Y ₁ from the first green pixel G ₁ , the blue pixel B, and the red pixel R in the same unit region, and the second luminance pixel generation unit 5, the second luminance pixel Y ₂ is generated from the second green pixel G ₂ , the blue pixel B, and the red pixel R in the same unit region, and the blue color difference pixel generation means 7 generates the second luminance pixel Y ₂ in the same unit region. A blue color difference pixel Cb is generated from the one green pixel G ₁ , the second green pixel G ₂ , the blue pixel B, and the red pixel R. The red color difference pixel generation means 9 generates the first green pixel in the same unit area. A red color difference pixel Cr is generated from G ₁ , the second green pixel G ₂ , the blue pixel B, and the red pixel R.

  An example of the calculation in the unit area in these conversion matrices (the first luminance pixel generation unit 3, the second luminance pixel generation unit 5, the blue color difference pixel generation unit 7, and the red color difference pixel generation unit 9) is expressed by Equation (2). It is expressed as follows.

By this mathematical formula (2), the three primary color signals shown in FIG. 2 are converted into luminance and color difference signals shown in the spatial pixel arrangement diagram of FIG.
As shown in FIG. 3, by the conversion matrix, the luminance pixel (first array) having the same structure (same arrangement) as the pixel structure (pixel arrangement) of the green pixel G (G ₁ , G ₂ ), which is a green signal. The color difference signal (blue color difference signal) having the same structure (same arrangement) as the pixel structure (pixel arrangement) of the luminance pixel Y ₁ , the second luminance pixel Y ₂ ), the blue pixel B that is a blue signal, and the red pixel R that is a red signal Blue color difference pixel Cb and red color difference pixel Cr) which is a red color difference signal.

In formula (2), when generating the blue color difference pixel Cb and the red color difference pixel Cr, the average value (G ₁ + G ₂ ) / 2 of the green pixels G (G ₁ , G ₂ ) in the unit area is used. However, a green signal (green pixel which is a green signal) interpolated from a green signal composed of green pixels G (G ₁ , G ₂ ) of a plurality of adjacent unit regions may be used.

Returning to FIG. 1, the description of the configuration of the video format conversion apparatus 1 (1A) (first embodiment) will be continued.
The scan conversion unit 11 scans the luminance pixel Y with the first luminance pixel Y ₁ generated by the first luminance pixel generation unit 3 and the second luminance pixel Y ₂ generated by the second luminance pixel generation unit 5. To convert.

As shown in FIG. 4, it is assumed that the first luminance pixel Y ₁ and the second luminance pixel Y ₂ adjacent to each other in the diagonal direction shown in FIG. Scan conversion is performed so that the first luminance pixel and the second luminance pixel in the unit area are alternately arranged in the horizontal direction.

  In the video format conversion apparatus 1 (1A) of the first embodiment, the blue color difference signal that becomes the blue color difference pixel Cb and the red color difference signal that becomes the red color difference pixel Cr do not require scanning conversion.

  Processing such as compression encoding, transmission, and recording is performed on the luminance / color difference format video signal converted by the video format conversion device 1 (1A). In other words, processing of compression coding, transmission, recording, etc. is performed by expressing (converting) a video signal of the three primary colors including the green signal of the rhombic pixel structure as a luminance / color difference video signal of the square lattice pixel structure. Can be performed easily and can be handled in a general manner.

  More specifically, in the 4: 2: 2 format luminance and chrominance signal spatial pixel arrangement diagram of the square lattice pixel structure shown in FIG. 4, the three primary color signals of the oblique lattice pixel structure shown in FIG. Compared with the spatial pixel arrangement diagram, the vertical resolution of the luminance signal Y is apparently half that of the green signal G, but the signal itself retains the original resolution as shown in FIG. Yes. Further, the total number of pixels in which the luminance signal Y and the color difference signals Cb and Cr are combined is the same as that of the original video signal in the three primary colors as shown in FIG. Therefore, according to the video format conversion apparatus 1 (1A), the square lattice is maintained while maintaining the horizontal and vertical resolutions of the three primary color format video signals including the green signal of the rhombic lattice pixel structure without increasing the pixel rate. It can be processed by a conventional video processing apparatus that processes a 4: 2: 2 format video signal expressed by a luminance signal and a color difference signal of a pixel structure.

<Configuration of Video Format Conversion Device, Second Embodiment>
FIG. 5 is a block diagram of a video format conversion apparatus (second embodiment). As shown in FIG. 5, the video format conversion apparatus 1 (1B) receives the input three primary color signals (G ₁ [first green pixel], G ₂ [second green pixel], B [blue pixel], R [ Red pixel]) is converted into a 4: 2: 2 format video signal using the luminance signal Y and the color difference signals Cb and Cr. The first luminance pixel generation unit 3, the second luminance pixel generation unit 5, A blue color difference pixel generation means 7, a red color difference pixel generation means 9, a scan conversion means 11B (different in operation from the first embodiment), a blue color difference pixel scan conversion means 13 and a red color difference pixel scan conversion means 15; It has. The same components as those described in the video format conversion apparatus 1 (1A) shown in FIG.

The blue color difference pixel scan conversion unit 13 scan-converts and outputs the blue color difference pixel Cb generated by the blue color difference pixel generation unit 7.
The red color difference pixel scan conversion means 15 scans and outputs the red color difference pixel Cr generated by the red color difference pixel generation means 9.

The scan conversion unit 11B of the video format conversion apparatus 1 (1B) has the first luminance pixel Y ₁ and the second luminance pixel Y ₂ adjacent to each other in the oblique direction shown in FIG. As shown in FIG. 6, scan conversion is performed so as to be alternately arranged in the vertical direction.

  Further, the blue color difference pixel scanning conversion unit 13 of the video format conversion device 1 (1B) converts the blue color difference pixel Cb having the square lattice pixel structure shown in FIG. 3 into two horizontally adjacent blue color difference pixels Cb. Are converted so as to be alternately arranged in the vertical direction as shown in FIG. Further, the red color difference pixel scanning conversion means 15 of the video format conversion apparatus 1 (1B) converts the red color difference pixel Cr having the square lattice pixel structure shown in FIG. 3 into two horizontally adjacent red color difference pixels Cr. Are converted so as to be alternately arranged in the vertical direction as shown in FIG.

  Processing such as compression encoding, transmission, and recording is performed on the luminance / color difference format video signal converted by the video format conversion device 1 (1B). In other words, processing of compression coding, transmission, recording, etc. is performed by expressing (converting) a video signal of the three primary colors including the green signal of the rhombic pixel structure as a luminance / color difference video signal of the square lattice pixel structure. Can be performed easily and can be handled in a general manner.

  More specifically, in the 4: 2: 2 format luminance and chrominance signal spatial pixel arrangement diagram of the square lattice pixel structure shown in FIG. 6, the square lattice pixel structure shown in FIG. Compared to the two types of spatial pixel arrangement of luminance and chrominance signals, the total number of pixels including the luminance signal Y and the chrominance signals Cb and Cr does not change, but the number of horizontal pixels is halved and the number of vertical pixels is It has doubled.

  6 is a spatial pixel arrangement diagram of luminance and chrominance signals in the 4: 2: 2 format of the square lattice pixel structure shown in FIG. 6, and a spatial pixel arrangement diagram of the three primary color signals of the oblique lattice pixel structure shown in FIG. In comparison, the horizontal resolution of the luminance signal Y is halved, the horizontal resolution of the color difference signals Cb and Cr is halved, and the vertical resolution is doubled. As shown in FIG. 3, the original resolution is maintained. Further, the total number of pixels including the luminance signal and the color difference signal is the same as that of the original three-primary-color video signal as shown in FIG. Therefore, according to the video format conversion apparatus 1 (1B), the square lattice pixel is maintained while maintaining the horizontal resolution and the vertical resolution of the three primary color video signals including the green signal of the rhombic lattice pixel structure without increasing the pixel rate. The video signal can be processed by a conventional video processing apparatus that processes a 4: 2: 2 format video signal expressed by a luminance signal and a color difference signal.

<Configuration of Video Format Conversion Device, Third Embodiment>
FIG. 7 is a block diagram of a video format conversion apparatus (third embodiment). As shown in FIG. 7, the video format conversion apparatus 1 (1C) receives the input three primary color signals (G ₁ [first green pixel], G ₂ [second green pixel], B [blue pixel], R [ Red pixel]) is converted into a 4: 2: 2 format video signal using the luminance signal Y and the color difference signals Cb and Cr. The first luminance pixel generation unit 3, the second luminance pixel generation unit 5, Blue color difference pixel generation means 7, red color difference pixel generation means 9, scan conversion means 11B (the same operation as the second embodiment), blue color difference pixel scan conversion means 13C (an operation different from the second embodiment), red The color difference pixel scanning conversion unit 15C (operation different from the second embodiment), the blue pixel interpolation unit 17, and the red pixel interpolation unit 19 are provided. The same components as those described in the video format conversion device 1 (1A) shown in FIG. 1 and the video format conversion device 1 (1B) shown in FIG. .

The blue pixel interpolating means 17 interpolates the input blue pixel B in the vertical direction within the unit area.
The red pixel interpolating means 19 interpolates the input red pixel R in the vertical direction within the unit area.

FIG. 8 shows a pixel structure interpolated in the vertical direction by the blue pixel interpolating means 17 and the red pixel interpolating means 19.
Here, the vertical interpolation by the blue pixel interpolation unit 17 and the red pixel interpolation unit 19 is performed, for example, according to the following equation (3).

In addition, the first luminance pixel generation unit 3, the second luminance pixel generation unit 5, the blue color difference pixel generation unit 7, and the red color difference pixel generation unit 9 of the video format conversion device 1 (1C) Based on (G ₁ , G ₂ ) and the interpolated (interpolated) blue and red pixels B and R, the first luminance pixel Y ₁ and the second luminance pixel Y ₂ according to the following equation (4): The blue color difference pixel Cb and the red color difference pixel Cr are generated (converted).

As shown in FIG. 9, the blue color difference pixel Cb and the red color difference pixel Cr generated by the equation (4) have a structure in which the spatial arrangement of adjacent pixels (adjacent pixels) is offset. Note that, as shown in FIG. 9, the first luminance pixel Y ₁ and the second luminance pixel Y ₂ are adjacent to each other in the oblique direction as in the second embodiment. Further, the first luminance pixel Y ₁ and the second luminance pixel Y ₂ are alternately arranged in the vertical direction by the scan conversion unit 11B as in the second embodiment, assuming that they are adjacent in the vertical direction. Scan conversion is performed so that the pixel arrangement of the luminance signal shown in FIG.

In FIG. 9, in the video format conversion apparatus 1 (1C), with respect to the blue color difference pixel Cb, two horizontally adjacent pixels are adjacent in the vertical direction by the blue color difference pixel scanning conversion unit 13C. As shown in FIG. 10, the scanning conversion is performed so that they are alternately arranged in the vertical direction.
Further, the red color difference pixel Cr is alternately arranged in the vertical direction as shown in FIG. 10 by assuming that two pixels adjacent in the horizontal direction are adjacent in the vertical direction by the red color difference pixel scanning conversion means 15C. Scan conversion is performed.

  Processing such as compression encoding, transmission, and recording is performed on the luminance / color difference format video signal converted by the video format conversion apparatus 1 (1C). In other words, processing of compression coding, transmission, recording, etc. is performed by expressing (converting) a video signal of the three primary colors including the green signal of the rhombic pixel structure as a luminance / color difference video signal of the square lattice pixel structure. Can be performed easily and can be handled in a general manner.

  More specifically, in the 4: 2: 2 format luminance and chrominance signal spatial pixel arrangement diagram of the square lattice pixel structure shown in FIG. 10, the 4: 2: 2 of the square lattice pixel structure shown in FIG. Compared to the two types of spatial pixel arrangement of luminance and chrominance signals, the total number of pixels including the luminance signal Y and the chrominance signals Cb and Cr does not change, but the number of horizontal pixels is halved and the number of vertical pixels is It has doubled.

  Further, in the 4: 2: 2 format luminance of the square lattice pixel structure shown in FIG. 10, the luminance of the 4: 2: 2 format of the square lattice pixel structure shown in FIG. Compared with the spatial pixel layout of the color difference signal, the horizontal resolution of the luminance signal Y is apparently halved, the horizontal resolution of the color difference signals Cb and Cr is halved, and the vertical resolution is doubled. However, the signal itself retains the original resolution as shown in FIG. Further, the total number of pixels including the luminance signal and the color difference signal is the same as that of the original three-primary color video signal shown in FIG. Therefore, according to the video format conversion apparatus 1 (1C), the square lattice pixel is maintained while maintaining the horizontal resolution and the vertical resolution of the three primary color video signals including the green signal of the rhombic lattice pixel structure without increasing the pixel rate. The video signal can be processed by a conventional video processing apparatus that processes a 4: 2: 2 format video signal expressed by a luminance signal and a color difference signal.

<Configuration of Video Format Conversion Device, Fourth Embodiment>
FIG. 11 is a block diagram of a video format conversion apparatus (fourth embodiment). As shown in FIG. 11, the video format conversion device 1 (1D) receives the input three primary color signals (G ₁ [first green pixel], G ₂ [second green pixel], B [blue pixel], R [ Red pixel]) is converted into a 4: 2: 2 format video signal by the luminance signal Y and the color difference signals Cb and Cr. The first luminance pixel generating means 3 and the second luminance pixel generating means 5, blue color difference pixel generation means 7, red color difference pixel generation means 9, scan conversion means 11B (same as in the third embodiment), blue color difference pixel scan conversion means 13C (same as in the third embodiment), Red color difference pixel scanning conversion means 15C (same as in the third embodiment), blue pixel interpolation means 17D (different in operation from the third embodiment), and red pixel interpolation means 19D (in different operation from the third embodiment) ). The video format conversion apparatus 1 (1A) shown in FIG. 1, the video format conversion apparatus 1 (1B) shown in FIG. 5, and the video format conversion apparatus 1 (1C) shown in FIG. Components are denoted by the same reference numerals and description thereof is omitted.

  Each configuration of the video format conversion device 1 (1D) is substantially the same as that of the video format conversion device 1 (1C). However, for the generation of luminance pixels, the blue pixel B and the red pixel R are blue pixel interpolation means. 17D and the red pixel interpolating means 19D are directly input to the first luminance pixel generating means 3 and the second luminance pixel generating means 5 without being interpolated. On the other hand, the interpolated blue pixel and red pixel are used for generating the color difference pixels. Is used.

Here, the pixel structure interpolated in the vertical direction by the blue pixel interpolation means 17D and the red pixel interpolation means 19D is shown in FIG.
As shown in FIG. 12, the upper left blue pixel B ₃₂ is shifted from the upper left blue pixel B ₁₂ shown in FIG. 2 to the blue pixel B ₂₁ shifted upward in the upper left unit area by the blue pixel interpolation means 17D. Is shifted to the lower right blue pixel B ^ ₄₂ in the upper right unit region, and the lower left blue pixel B ₁₄ is shifted to the lower right blue pixel B ₂₃ in the lower left unit region. ₃₄ is interpolated into a blue pixel B ₄₄ shifted downward in the lower right unit area.

Further, as shown in FIG. 12, the red pixel interpolation unit 19D, the red pixel R ^ ₁₁ to the upper left of the red pixel R ₂₁ is displaced upwards in the unit area of the upper left of FIG. 2, upper right of the red the red pixel R ^ ₃₂ where pixels R ₄₁ is displaced downward in the top right corner of the unit area, the red pixel R ^ ₁₃ to the lower left of the red pixel R ₂₃ is displaced upwardly in the bottom left of the unit area, the lower right The red pixel R ₄₃ is interpolated to the red pixel R ^ ₃₄ shifted downward in the lower right unit area.

  Here, the vertical interpolation by the blue pixel interpolation unit 17D and the red pixel interpolation unit 19D is performed, for example, according to the following formula (5).

In addition, the first luminance pixel generation unit 3 and the second luminance pixel generation unit 5 of the video format conversion device 1 (1D) include a green pixel G (G ₁ , G ₂ ), a blue pixel B, and a red pixel R. In addition, the blue color difference pixel generation unit 7 and the red color difference pixel generation unit 9 include a green pixel G (G ₁ , G ₂ ), an interpolated (interpolated generation) blue pixel B, and a red pixel R. Based on the above, the first luminance pixel Y ₁ , the second luminance pixel Y ₂ , the blue color difference pixel Cb, and the red color difference pixel Cr are generated (converted) according to the following formula (6).

  The blue color difference pixel Cb and the red color difference pixel Cr generated by the equation (6) have a structure in which the spatial arrangement of adjacent pixels (adjacent pixels) is offset. In this case, the spatial pixel arrangement of the luminance and color difference signals is Similar to FIG. The coefficients g, b, and r in the equation (6) are the same as those used in the equation (1).

The first luminance pixel Y ₁ and the second luminance pixel Y ₂ are adjacent to each other in the oblique direction as in the second embodiment. In the video format conversion apparatus 1 (1D), the first luminance pixel Y ₁ and the second luminance pixel Y ₂ are adjacent to each other in the vertical direction by the scan conversion unit 11B as in the second and third embodiments. As a result, scanning conversion is performed so that the pixels are alternately arranged in the vertical direction, and the pixel arrangement of the luminance signal shown in FIG. 10 is converted.

  Further, in the video format conversion device 1 (1D), as for the blue color difference pixel Cb, two pixels that are horizontally adjacent to each other are adjacent to each other in the vertical direction by the blue color difference pixel scan conversion unit 13C as in the third embodiment. As shown in FIG. 10, the scanning conversion is performed so that the pixels are alternately arranged in the vertical direction, as shown in FIG.

  As for the red color difference pixel Cr, as shown in FIG. 10, it is assumed that two pixels adjacent to each other in the horizontal direction are adjacent in the vertical direction by the red color difference pixel scanning conversion unit 15C as in the third embodiment. Scan conversion is performed so that they are alternately arranged in the vertical direction in the same manner as described above.

  Processing such as compression encoding, transmission, and recording is performed on the luminance / color difference format video signal converted by the video format conversion device 1 (1D). In other words, processing of compression coding, transmission, recording, etc. is performed by expressing (converting) a video signal of the three primary colors including the green signal of the rhombic pixel structure as a luminance / color difference video signal of the square lattice pixel structure. Can be performed easily and can be handled in a general manner.

  More specifically, in the 4: 2: 2 format luminance and chrominance signal spatial pixel arrangement diagram of the square lattice pixel structure shown in FIG. 10, the 4: 2: 2 of the square lattice pixel structure shown in FIG. Compared to the two types of spatial pixel arrangement of luminance and chrominance signals, the total number of pixels including the luminance signal Y and the chrominance signals Cb and Cr does not change, but the number of horizontal pixels is halved and the number of vertical pixels is It has doubled.

  Further, in the 4: 2: 2 format luminance of the square lattice pixel structure shown in FIG. 10, the luminance of the 4: 2: 2 format of the square lattice pixel structure shown in FIG. Compared with the spatial pixel layout of the color difference signal, the horizontal resolution of the luminance signal Y is apparently halved, the horizontal resolution of the color difference signals Cb and Cr is halved, and the vertical resolution is doubled. However, the signal itself retains the original resolution as shown in FIG. Further, the total number of pixels including the luminance signal and the color difference signal is the same as that of the original three-primary color video signal shown in FIG. Therefore, according to the video format conversion device 1 (1D), the square lattice pixel is maintained while maintaining the horizontal resolution and the vertical resolution of the three primary color video signals including the green signal of the rhombic lattice pixel structure without increasing the pixel rate. The video signal can be processed by a conventional video processing apparatus that processes a 4: 2: 2 format video signal expressed by a luminance signal and a color difference signal.

<Configuration of video format reverse conversion device, first embodiment>
FIG. 13 is a block diagram of a video format reverse conversion apparatus (first embodiment). As shown in FIG. 13, the video format reverse conversion device 21 (21A) converts the 4: 2: 2 format video signal based on the input luminance signal Y and the color difference signals Cb and Cr into the three primary color signals (G ₁ [G [ First green pixel], G ₂ [second green pixel], B [blue pixel], R [red pixel]), scan conversion means 23, first green pixel generation means 25, second A green pixel generation unit 27, a blue pixel generation unit 29, and a red pixel generation unit 31 are provided.

The scan conversion unit 23 scan-converts the luminance pixel Y for the luminance signal in FIG. 4 and outputs the first luminance pixel Y ₁ and the second luminance pixel Y ₂ . The luminance conversion unit 23 scans and converts the luminance pixel Y, thereby converting the luminance pixel Y into the pixel structure shown at the spatial pixel position of the luminance signal in FIG.

The first green pixel generation means 25 generates the first green pixel G ₁ based on the first luminance pixel Y ₁ , the second luminance pixel Y ₂ , the blue color difference pixel Cb, and the red color difference pixel Cr. In the first green pixel generation means 25, the first green pixel G ₁ is obtained by adopting the formula G _{1 in} the following formula (7) of the conversion formula.

The second green pixel generation unit 27 generates the second green pixel G ₂ based on the first luminance pixel Y ₁ , the second luminance pixel Y ₂ , the blue color difference pixel Cb, and the red color difference pixel Cr. In the second green pixel generation means 27, the second green pixel G ₂ is obtained by using the formula G _{2 in} the following formula (7) of the conversion formula.

The blue pixel generation unit 29 generates a blue pixel B based on the first luminance pixel Y ₁ , the second luminance pixel Y _2, and the blue color difference pixel Cb. In the blue pixel generation unit 29, the blue pixel B is obtained by employing the formula B in the conversion formula (7) described later.

The red pixel generation unit 31 generates a red pixel R based on the first luminance pixel Y ₁ , the second luminance pixel Y _2, and the red color difference pixel Cr. In the red pixel generation means 31, the red pixel R is obtained by employing the R formula in the formula (7) of the conversion formula described later.

  The first green pixel generation unit 25, the second green pixel generation unit 27, the blue pixel generation unit 29, and the red pixel generation unit 31 convert a video signal represented by a luminance signal and a color difference signal into a green signal, a blue signal, and a red signal. This is a so-called conversion matrix for converting into a video signal represented by

  Further, an example calculated for the unit area is shown in the following formula (8).

  As calculated by the mathematical formula (8), when the first green pixel generation unit 25, the second green pixel generation unit 27, the blue pixel generation unit 29, and the red pixel generation unit 31 perform calculations for the unit area, the luminance The video signal in the three primary colors shown in FIG. 2 is restored (reversely converted) from the video signal in the color difference format.

<Configuration of Video Format Inversion Device, Second Embodiment>
FIG. 14 is a block diagram of a video format reverse conversion apparatus (second embodiment). As shown in FIG. 14, the video format inverse conversion device 21 (21B) converts the 4: 2: 2 format video signal based on the input luminance signal Y and the color difference signals Cb and Cr into the three primary color signals (G ₁ [G [ 1st green pixel], G ₂ [second green pixel], B [blue pixel], R [red pixel]) video signal, and the scanning conversion means 23B (first embodiment of the inverse conversion device) Are different operations), first green pixel generation means 25, second green pixel generation means 27, blue pixel generation means 29, red pixel generation means 31, blue color difference pixel scan conversion means 33, and red color difference pixels. Scanning conversion means 35. In addition, the same thing as the structure demonstrated with the video format reverse conversion apparatus 21 (21A) shown in FIG. 13 is attached | subjected, and the description is abbreviate | omitted.

The scan conversion means 23B scan-converts the luminance pixel Y for the luminance signal in FIG. 6 and outputs the first luminance pixel Y ₁ and the second luminance pixel Y ₂ . The luminance signal Y in FIG. 3 is converted by scanning conversion of the luminance pixel Y by the scanning conversion unit 23B to the luminance pixel of the first line to the first luminance pixel and the luminance pixel of the second line to the second luminance pixel, respectively. The pixel structure shown in the target pixel position is converted.
The blue color difference pixel scanning conversion means 33 scan-converts the pixel arrangement of the blue color difference pixels Cb of the input blue color difference signal shown in FIG. 6 into the blue color difference pixel spatial pixel arrangement shown in FIG. .
The red color difference pixel scan conversion means 35 scans and converts the input pixel arrangement of the red color difference pixels Cr of the red color difference signal shown in FIG. 6 into the spatial arrangement of red color difference pixels shown in FIG. .

  The luminance pixel Y, the blue color difference pixel Cb, and the red color difference pixel Cr are scanned and converted by the scan conversion unit 23B, the blue color difference scan conversion unit 33, and the red color difference pixel scan conversion unit 35, so that the luminance and color difference signals of FIG. The pixel structure shown in the spatial pixel position is converted.

  Then, when the first green pixel generation unit 25, the second green pixel generation unit 27, the blue pixel generation unit 29, and the red pixel generation unit 31 perform calculations for the unit area, a luminance / color difference format video signal is displayed. The video signal of the three primary colors shown by 2 is restored (inverted).

<Configuration of video format reverse conversion device, third embodiment>
FIG. 15 is a block diagram of a video format reverse conversion apparatus (third embodiment). As shown in FIG. 15, the video format inverse conversion device 21 (21C) converts the 4: 2: 2 format video signal based on the input luminance signal Y and the color difference signals Cb and Cr into the three primary color signals (G ₁ [G [ First green pixel], G ₂ [second green pixel], B [blue pixel], R [red pixel]) video signal, and a scanning conversion means 23B (the second embodiment of the inverse conversion device) The same), the first green pixel generation means 25, the second green pixel generation means 27, the blue pixel generation means 29, the red pixel generation means 31, and the blue color difference pixel scanning conversion means 33C (second of the inverse conversion device). Operation is different from that of the embodiment), red color difference pixel scanning conversion means 35C (operation is different from that of the second embodiment of the inverse conversion device), blue pixel interpolation means 37, and red pixel interpolation means 39. Yes. The same components as those described in the video format reverse conversion device 21 (21A) shown in FIG. 13 and the video format reverse conversion device 21 (21B) shown in FIG. Omitted.

The blue pixel interpolation unit 37 interpolates the blue pixel B generated by the blue pixel generation unit 29.
The red pixel interpolating unit 39 interpolates the red pixel R generated by the red pixel generating unit 39.

  First, in the video format inverse conversion device 21 (21C), the scan conversion means 23B, the blue color difference scan conversion means 33C, and the red color difference pixel scan conversion means 35C are applied to the luminance / color difference signals in the 4: 2: 2 format shown in FIG. Then, the luminance pixel Y, the blue color difference pixel Cb, and the red color difference pixel Cr are scanned and converted to the pixel structure shown in the spatial pixel position of the luminance and color difference signals in FIG.

  Subsequently, in the video format inverse conversion device 21 (21C), the first green pixel generation unit 25, the second green pixel generation unit 27, the blue pixel generation unit 29, and the red pixel generation unit 31 are expressed using Expression (9). , The 4: 2: 2 format video signal is restored (inverted) to the three primary color format video signal shown in FIG.

  Formula (9) shows an example of calculation for the unit area indicated at the spatial pixel position of the luminance and color difference signals in FIG.

  Then, the video format inverse conversion device 21 (21C) uses the blue pixel interpolation unit 37 and the red pixel interpolation unit 39 to perform the vertical interpolation of the blue pixel B and the red pixel R using, for example, Expression (10). Do.

By using this equation (10), the blue pixel B (B ₂₁ , B ₄₂ , B ₂₃ , B ₄₄ ) and the red pixel R (R ₁₁ , R ₃₂ , R ₁₃ , R ₃₄ ) are interpolated in the vertical direction. 16 is a pixel structure (blue pixel B (B ^ ₁₂ , B ^ ₃₂ , B) where the spatial pixel arrangement of the three primary color signals shown in FIG. 16 is represented by the spatial pixel arrangement (interpolation of B and R signals) shown in FIG. ^ ₁₄ , B ^ ₃₄ ) and red pixel R (R ^ ₂₁ , R ^ ₄₁ , R ^ ₂₃ , R ^ ₄₃ )).

<Operation of Video Format Conversion Device, First Embodiment>
Next, the operation of the video format conversion apparatus 1 (1A) will be described with reference to the flowchart shown in FIG. 18 (see FIG. 1 as appropriate).
The video format conversion apparatus 1 (1A) generates the first luminance pixel Y ₁ from the input first green pixel G ₁ , blue pixel B and red pixel R by the first luminance pixel generation means 3 (step S1). . In the video format conversion device 1 (1A), the second luminance pixel generation unit 5 generates the second luminance pixel Y ₂ from the input second green pixel G ₂ , blue pixel B, and red pixel R (step). S2).

Then, the video format conversion apparatus 1 (1A) scan-converts the first luminance pixel Y ₁ and the second luminance pixel Y ₂ by the scan conversion unit 11 to generate the luminance pixel Y (step S5).

In the video format conversion apparatus 1 (1A), the blue color difference pixel generation unit 7 generates a blue color difference pixel Cb from _one green pixel G ₁ , the other green pixel G ₂ , the blue pixel B, and the red pixel R ( Step S3).

In the video format conversion apparatus 1 (1A), the red color difference pixel generation means 9 generates a red color difference pixel Cr from _one green pixel G ₁ , the other green pixel G ₂ , the blue pixel B, and the red pixel R ( Step S4).

  Note that the steps S1, S2, and S5 for generating the luminance pixel Y, step S3 for generating the blue color difference pixel Cb, and step S4 for generating the red color difference pixel Cr are the video format conversion device 1 ( 1A) is processed in parallel.

<Operation of Video Format Conversion Device, Second Embodiment>
Next, the operation of the video format conversion apparatus 1 (1B) will be described with reference to the flowchart shown in FIG. 19 (see FIG. 5 as appropriate).
The video format conversion device 1 (1B) generates the first luminance pixel Y ₁ from the input first green pixel G ₁ , blue pixel B, and red pixel R by the first luminance pixel generation means 3 (step S11). . In the video format conversion device 1 (1B), the second luminance pixel generation unit 5 generates the second luminance pixel Y ₂ from the input second green pixel G ₂ , blue pixel B, and red pixel R (step). S12).

The video format conversion apparatus 1 (1B) is the scan conversion unit 11B, a first luminance pixel Y ₁ and the second luminance pixel Y ₂ scan conversion, to generate a luminance pixel Y (step S15).

In the video format conversion apparatus 1 (1B), the blue color difference pixel generation unit 7 generates a blue color difference pixel Cb from the first green pixel G ₁ , the second green pixel G ₂ , the blue pixel B, and the red pixel R ( Step S13).

  Then, the video format conversion apparatus 1 (1B) scans and outputs the blue color difference pixel Cb generated by the blue color difference pixel generation unit 7 by the blue color difference pixel scan conversion unit 13 (step S16).

In the video format conversion device 1 (1B), the red color difference pixel generation unit 9 generates a red color difference pixel Cr from the first green pixel G ₁ , the second green pixel G ₂ , the blue pixel B, and the red pixel R ( Step S14).

  The video format conversion apparatus 1 (1B) scans and outputs the red color difference pixel Cr generated by the red color difference pixel generation unit 9 by the red color difference pixel scan conversion unit 15 (step S17).

  In addition, the step group of step S11, step S12, and step S15 that generates the luminance pixel Y, the step group of step S13 and step S16 that generates and scan converts the blue color difference pixel Cb, and the scan group that generates the red color difference pixel Cr. Steps S14 and S17 are processed in parallel in the video format conversion apparatus 1 (1B).

<Operation of Video Format Conversion Device, Third Embodiment>
Next, the operation of the video format conversion apparatus 1 (1C) will be described with reference to the flowchart shown in FIG. 20 (see FIG. 7 as appropriate).
First, the video format conversion apparatus 1 (1C) interpolates the blue pixel B by the blue pixel interpolation means 17 (step S21), and interpolates the red pixel R by the red pixel interpolation means 19 (step S22). The steps S21 and S22 are processed in parallel in the video format conversion apparatus 1 (1C).

Subsequently, the video format conversion apparatus 1 (1C) uses the first luminance pixel generation means 3 to input the first luminance pixel from the input first green pixel G ₁ , interpolated blue pixel B, and interpolated red pixel R. Y ₁ is generated (step S23). Also, the video format conversion apparatus 1 (1C) uses the second luminance pixel generation means 5 to input the second luminance pixel Y from the input second green pixel G ₂ , interpolated blue pixel B and interpolated red pixel R. ₂ is generated (step S24).

Then, the video format conversion apparatus 1 (1C) scan-converts the first luminance pixel Y ₁ and the second luminance pixel Y ₂ by the scan conversion unit 11B to generate the luminance pixel Y (step S27).

Also, the video format conversion device 1 (1C) uses the blue color difference pixel generation means 7 to generate a blue color difference from the first green pixel G ₁ , the second green pixel G ₂ , the interpolated blue pixel B, and the interpolated red pixel R. A pixel Cb is generated (step S25).

  Then, the video format conversion apparatus 1 (1C) scans and outputs the blue color difference pixel Cb generated by the blue color difference pixel generation means 7 by the blue color difference pixel scan conversion means 13C (step S28).

Also, the video format conversion device 1 (1C) uses the red color difference pixel generation means 9 to change the red color difference from the first green pixel G ₁ , the second green pixel G ₂ , the interpolated blue pixel B, and the interpolated red pixel R. Pixel Cr is generated (step S26).

  Then, the video format conversion device 1 (1C) scan-converts and outputs the red color difference pixel Cr generated by the red color difference pixel generation unit 9 by the red color difference pixel scan conversion unit 15C (step S29).

  It should be noted that step S23, step S24 and step S27 for generating luminance pixel Y, step group of step S25 and step S28 for generating blue color difference pixel Cb and scan conversion, and red color difference pixel Cr for scan conversion. Steps S26 and S29 are processed in parallel in the video format conversion device 1 (1C).

<Operation of Video Format Conversion Device, Fourth Embodiment>
Next, the operation of the video format conversion apparatus 1 (1D) will be described with reference to the flowchart shown in FIG. 21 (see FIG. 11 as appropriate).
The video format conversion device 1 (1D) generates the first luminance pixel Y ₁ from the input first green pixel G ₁ , blue pixel B and red pixel R by the first luminance pixel generation means 3 (step S33). . In the video format conversion device 1 (1D), the second luminance pixel generation unit 5 generates the second luminance pixel Y ₂ from the input second green pixel G ₂ , blue pixel B, and red pixel R (step). S34).

Then, the video format conversion device 1 (1D) scans and converts the first luminance pixel Y ₁ and the second luminance pixel Y ₂ by the scan conversion unit 11B to generate the luminance pixel Y (step S37).

  Further, the video format conversion apparatus 1 (1D) interpolates the blue pixel B by the blue pixel interpolation unit 17D (step S31), and interpolates the red pixel R by the red pixel interpolation unit 19D (step S32). Steps S31 and S32 are processed in parallel in the video format conversion apparatus 1 (1D).

Then, the video format conversion device 1 (1D) uses the blue color difference pixel generation means 7 to generate a blue color difference from the first green pixel G ₁ , the second green pixel G ₂ , the interpolated blue pixel B, and the interpolated red pixel R. A pixel Cb is generated (step S35).

  Then, the video format conversion apparatus 1 (1D) scans and outputs the blue color difference pixel Cb generated by the blue color difference pixel generation unit 7 by the blue color difference pixel scan conversion unit 13C (step S38).

Also, the video format conversion device 1 (1D) uses the red color difference pixel generation means 9 to change the red color difference from the first green pixel G ₁ , the second green pixel G ₂ , the interpolated blue pixel B, and the interpolated red pixel R. Pixel Cr is generated (step S36).

  Then, the video format conversion apparatus 1 (1D) scan-converts and outputs the red color difference pixel Cr generated by the red color difference pixel generation unit 9 by the red color difference pixel scan conversion unit 15C (step S39).

  In addition, after interpolating the group of steps S33, S34, and S37 for generating the luminance pixel Y and the blue pixel B and the red pixel R, the blue color difference pixel Cb and the red color difference pixel Cr are generated and subjected to scan conversion S31. , Step S32, Step S35, Step S36, Step S38 and Step 39 are processed in parallel in the video format conversion apparatus 1 (1D).

<Operation of Video Format Inverting Device, First Embodiment>
Next, the operation of the video format reverse conversion device 21 (21A) will be described with reference to the flowchart shown in FIG. 22 (see FIG. 13 as appropriate).
First, the video format reverse-conversion device 21 (21A) is the scan conversion unit 23, scan converting the luminance pixels Y, to generate a first luminance pixel Y ₁ and the second luminance pixel Y ₂ (step S41).

Subsequently, the video format reverse conversion device 21 (21A) uses the first green pixel generation means 25 to convert the first green pixel from the first luminance pixel Y ₁ , the second luminance pixel Y ₂ , the blue color difference pixel Cb, and the red color difference pixel Cr. generates pixel G ₁ (step S42), the second green pixel generating unit 27, a first luminance pixel Y _1, second luminance pixel Y _2, second green pixel from the blue chrominance pixel Cb and the red chrominance pixel Cr G ₂ Is generated (step S43).

In addition, the video format reverse conversion device 21 (21A) generates the blue pixel B from the first luminance pixel Y ₁ , the second luminance pixel Y _2, and the blue color difference pixel Cb by the blue pixel generation unit 29 (step S44).

Further, the video format reverse conversion device 21 (21A) uses the red pixel generation means 31 to generate the red pixel R from the first luminance pixel Y ₁ , the second luminance pixel Y _2, and the red color difference pixel Cr (step S45). Note that these steps S42 to S45 are processed in parallel in the video format reverse conversion device 21 (21A).

<Operation of Video Format Inverting Device, Second Embodiment>
Next, the operation of the video format inverse conversion device 21 (21B) will be described with reference to the flowchart shown in FIG. 23 (see FIG. 14 as appropriate).
The video format inverse conversion device 21 (21B) scan-converts the luminance pixel Y by the scanning conversion unit 23B, and generates the first luminance pixel Y ₁ and the second luminance pixel Y ₂ (step S51).

  The video format reverse conversion device 21 (21B) scans and outputs the blue color difference pixel Cb by the blue color difference pixel scan conversion unit 33 (step S52), and the red color difference pixel scan conversion unit 35 outputs the red color difference pixel. Cr is scanned and output (step S53). Note that these steps S51 to S53 are processed in parallel in the video format reverse conversion device 21 (21B).

Then, the video format inverse conversion device 21 (21B) uses the first green pixel generation means 25 to convert the first luminance pixel Y ₁ , the second luminance pixel Y ₂ , the blue color difference pixel Cb, and the red color difference pixel Cr to the first green pixel. generates G ₁ by (step S54), the second green pixel generating unit 27, a first luminance pixel Y _1, second luminance pixel Y _2, a second green pixel G ₂ from the blue chrominance pixel Cb and the red chrominance pixel Cr Generate (step S55).

Further, the video format inverse conversion device 21 (21B) generates the blue pixel B from the first luminance pixel Y ₁ , the second luminance pixel Y _2, and the blue color difference pixel Cb by the blue pixel generation unit 29 (step S56).

Further, the video format reverse conversion device 21 (21B) generates the red pixel R from the first luminance pixel Y ₁ , the second luminance pixel Y ₂ and the red color difference pixel Cr by the red pixel generation means 31 (step S57). Note that these steps S54 to S57 are processed in parallel in the video format reverse conversion device 21 (21B).

<Operation of Video Format Reverse Conversion Device, Third Embodiment>
Next, the operation of the video format inverse conversion device 21 (21C) will be described with reference to the flowchart shown in FIG. 24 (see FIG. 15 as appropriate).
The video format reverse conversion device 21 (21C) scan-converts the luminance pixel Y by the scanning conversion unit 23B, and generates the first luminance pixel Y ₁ and the second luminance pixel Y ₂ (step S61).

  The video format inverse conversion device 21 (21C) scans and outputs the blue color difference pixel Cb by the blue color difference pixel scan conversion unit 33C (step S62), and the red color difference pixel scan conversion unit 35C outputs the red color difference pixel. Cr is scanned and output (step S63). Note that these steps S61 to S63 are processed in parallel in the video format reverse conversion device 21 (21C).

Then, the video format inverse conversion device 21 (21C) uses the first green pixel generation unit 25 to convert the first luminance pixel Y ₁ , the second luminance pixel Y ₂ , the blue color difference pixel Cb, and the red color difference pixel Cr to the first green pixel. generates G ₁ by (step S64), the second green pixel generating unit 27, a first luminance pixel Y _1, second luminance pixel Y _2, a second green pixel G ₂ from the blue chrominance pixel Cb and the red chrominance pixel Cr Generate (step S65).

Further, the video format inverse conversion device 21 (21C) generates the blue pixel B from the first luminance pixel Y ₁ , the second luminance pixel Y _2, and the blue color difference pixel Cb by the blue pixel generation unit 29 (step S66).

  Then, the video format reverse conversion device 21 (21C) interpolates and outputs the blue pixel B by the blue pixel interpolation means 37 (step S68).

In addition, the video format reverse conversion device 21 (21C) generates the red pixel R from the first luminance pixel Y ₁ , the second luminance pixel Y _2, and the red color difference pixel Cr by the red pixel generation unit 31 (step S67).
Then, the video format inverse conversion device 21 (21C) interpolates and outputs the red pixel R by the red pixel interpolation means 39 (step S69).

Incidentally, the step S64 of generating a first green pixel G _1, and step S65 of generating a second green pixel G _2, and steps of the step S66 and the step S68 to generate interpolated blue pixel B, and the red pixel R Steps S67 and S69 for generating and interpolating are processed in parallel in the video format inverse conversion device 21 (21C).

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment. For example, in the present embodiment, the video format conversion device 1 (1A, 1B, 1C, 1D) and the video format reverse conversion device 21 (21A, 21B, 21C) have been described. Can be regarded as a video format conversion program and a video format reverse conversion program described in a simple computer language. In these cases, the same effects as those of the video format conversion device 1 (1A, 1B, 1C, 1D) and the video format reverse conversion device 21 (21A, 21B, 21C) can be obtained.

1 is a block diagram of a video format conversion apparatus (first embodiment) according to an embodiment of the present invention. It is the figure which showed the spatial pixel arrangement | positioning of a three primary color signal. It is the figure which showed the spatial pixel arrangement | positioning (middle progress) of the luminance signal of a video signal, and a color difference signal by the video format conversion apparatus of 1st embodiment. It is the figure which showed the spatial pixel arrangement | positioning of the luminance signal of a video signal by the video format conversion apparatus of 1st embodiment, and a color difference signal. It is a block diagram of the video format conversion apparatus (2nd embodiment) which concerns on embodiment of this invention. It is the figure which showed the spatial pixel arrangement | positioning of the luminance signal of a video signal by the video format conversion apparatus of 2nd embodiment, and a color difference signal. It is a block diagram of the video format conversion apparatus (3rd embodiment) which concerns on embodiment of this invention. It is the figure which showed the spatial pixel arrangement | positioning at the time of interpolating a blue signal and a red signal with the video format conversion apparatus of 3rd embodiment. It is the figure which showed the spatial pixel arrangement | positioning (middle progress) of the luminance signal of a video signal, and a color difference signal by the video format conversion apparatus of 3rd embodiment. It is the figure which showed the spatial pixel arrangement | positioning of the luminance signal of a video signal by the video format conversion apparatus of 3rd embodiment, and a color difference signal. It is a block diagram of the video format conversion apparatus (4th embodiment) which concerns on embodiment of this invention. It is the figure which showed the spatial pixel arrangement | positioning at the time of interpolating a blue signal and a red signal with the video format conversion apparatus of 4th embodiment. It is a block diagram of the video format reverse conversion apparatus (1st embodiment) which concerns on embodiment of this invention. It is a block diagram of the video format reverse conversion apparatus (2nd embodiment) which concerns on embodiment of this invention. It is a block diagram of the video format reverse conversion apparatus (3rd embodiment) which concerns on embodiment of this invention. It is the figure which showed the spatial pixel arrangement | positioning of the three primary color signals by the video format reverse conversion apparatus of 3rd embodiment. It is the figure which showed the spatial pixel arrangement | positioning at the time of interpolating a blue signal and a red signal by the video format reverse conversion apparatus of 3rd embodiment. 2 is a flowchart for explaining the operation of the video format conversion apparatus (first embodiment) shown in FIG. 1. 6 is a flowchart illustrating an operation of the video format conversion apparatus (second embodiment) illustrated in FIG. 5. It is a flowchart explaining operation | movement of the video format conversion apparatus (3rd embodiment) shown in FIG. 12 is a flowchart for explaining the operation of the video format conversion apparatus (fourth embodiment) shown in FIG. 14 is a flowchart for explaining the operation of the video format inverse conversion apparatus (first embodiment) shown in FIG. 13. It is the flowchart explaining operation | movement of the video format reverse conversion apparatus (2nd embodiment) shown in FIG. 16 is a flowchart for explaining the operation of the video format reverse conversion device (third embodiment) shown in FIG. 15.

Explanation of symbols

1 (1A, 1B, 1C, 1D) Video format conversion device 3 First luminance pixel generation means 5 Second luminance pixel generation means 7 Blue color difference pixel generation means 9 Red color difference pixel generation means 11, 11B, 23, 23B Scan conversion means 13, 13C Blue color difference pixel scanning conversion means 15, 15C Red color difference pixel scanning conversion means 17, 17D, 37 Blue pixel interpolation means 19, 19D, 39 Red pixel interpolation means 21 (21A, 21B, 21C) Video format reverse conversion device 25 First green pixel generation means 27 Second green pixel generation means 29 Blue pixel generation means 31 Red pixel generation means 33, 33C Blue color difference pixel scan conversion means 35, 35C Red color difference pixel scan conversion means

Claims (9)

A green signal having an oblique lattice pixel structure, a red signal and a blue signal having a square lattice pixel structure, two pixels of a first green pixel and a second green pixel that are pixels of the green signal per unit area, A video format conversion device for converting a video signal in a three-primary color format composed of one red pixel that is a pixel of a red signal and one blue pixel that is a pixel of the blue signal into a video signal of luminance / color difference format,
First luminance pixel generating means for generating a first luminance pixel from the first green pixel, the red pixel, and the blue pixel in the unit region;
Second luminance pixel generating means for generating a second luminance pixel from the second green pixel, the red pixel and the blue pixel in the unit region;
Blue color difference pixel generating means for generating a blue color difference pixel in the luminance / color difference format video signal from the first green pixel and the second green pixel, and the red pixel and the blue pixel,
A red color difference pixel generating means for generating a red color difference pixel in the video signal of the luminance / color difference format from the first green pixel and the second green pixel, and the red pixel and the blue pixel;
The luminance pixel of the video signal in the luminance / color difference format is obtained by scanning-converting the first luminance pixel generated by the first luminance pixel generating unit and the second luminance pixel generated by the second luminance pixel generating unit. Scan conversion means for generating
A video format conversion apparatus comprising: Blue color difference pixel scan conversion means for scanning and converting the blue color difference pixels;
Red color difference pixel scanning conversion means for scanning and converting the red color difference pixels;
The video format conversion apparatus according to claim 1, further comprising: Blue pixel interpolation means for interpolating the blue pixels in the unit region;
Red pixel interpolation means for interpolating the red pixel in the unit region,
The interpolated blue pixel and red pixel are input to the first luminance pixel generation means, the second luminance pixel generation means, the blue color difference pixel generation means, and the red color difference pixel generation means. The video format conversion apparatus according to claim 2.   The blue pixel and the red pixel before being interpolated by the blue pixel interpolation unit and the red pixel interpolation unit are input to the first luminance pixel generation unit and the second luminance pixel generation unit, respectively. Item 4. The video format conversion device according to Item 3. A green signal having an oblique lattice pixel structure, a red signal and a blue signal having a square lattice pixel structure, two pixels of a first green pixel and a second green pixel that are pixels of the green signal per unit area, A converted video signal obtained by converting a video signal of the three primary colors composed of one red pixel as a red signal pixel and one blue pixel as the blue signal pixel into a luminance / color difference video signal is converted into an oblique lattice. A video format reverse conversion device that performs reverse conversion to a video signal of the three primary colors having a pixel structure,
Scan conversion means for scanning and converting a luminance pixel which is a pixel of a luminance signal in the luminance and color difference format video signal, and outputting a first luminance pixel and a second luminance pixel as a result of the scanning conversion;
The first luminance pixel and the second luminance pixel that are scanned and output by the scan conversion means, the blue color difference pixel that is a pixel of the blue color difference signal of the video signal of the luminance / color difference format, and the luminance / color difference format First green pixel generating means for generating the first green pixel from a red color difference pixel which is a pixel of a red color difference signal of the video signal;
Second green pixel generation means for generating the second green pixel from the first luminance pixel and the second luminance pixel, the blue color difference pixel, and the red color difference pixel;
Blue pixel generation means for generating the blue pixel from the first luminance pixel and the second luminance pixel, the blue color difference pixel, and the red color difference pixel;
A red pixel generating means for generating the red pixel from the first luminance pixel and the second luminance pixel, the blue color difference pixel, and the red color difference pixel;
A video format reverse conversion device comprising: A blue color difference pixel scanning conversion means for scanning and converting a blue color difference pixel that is a pixel of a blue color difference signal of the luminance / color difference format video signal;
A red color difference pixel scanning conversion means for scanning and converting a red color difference pixel that is a pixel of a red color difference signal of the luminance / color difference format video signal;
The video format inverse conversion device according to claim 5, further comprising: Blue pixel interpolation means for interpolating the blue pixels in the unit region;
A red pixel interpolating means for interpolating the red pixel in the unit region;
The video format inverse conversion device according to claim 6, further comprising: A green signal having an oblique lattice pixel structure, a red signal and a blue signal having a square lattice pixel structure, two pixels of a first green pixel and a second green pixel that are pixels of the green signal per unit area, An apparatus for converting a video signal in the three primary colors composed of one red pixel as a red signal pixel and one blue pixel as the blue signal into a luminance / color difference video signal,
First luminance pixel generating means for generating a first luminance pixel from the first green pixel, the red pixel, and the blue pixel in the unit region;
Second luminance pixel generating means for generating a second luminance pixel from the second green pixel, the red pixel, and the blue pixel in the unit region;
A blue color difference pixel generating means for generating a blue color difference pixel in the video signal of the luminance / color difference format from the first green pixel, the second green pixel, and the red pixel and the blue pixel;
A red color difference pixel generating means for generating a red color difference pixel in the video signal of the luminance / color difference format from the first green pixel and the second green pixel, and the red pixel and the blue pixel;
The first luminance pixel generated by the first luminance pixel generation unit and the second luminance pixel generated by the second luminance pixel generation unit are scan-converted, and luminance pixels in the luminance / color difference format video signal are converted. Scan conversion means to generate,
A video format conversion program characterized by functioning as A green signal having an oblique lattice pixel structure, a red signal and a blue signal having a square lattice pixel structure, two pixels of a first green pixel and a second green pixel that are pixels of the green signal per unit area, A converted video signal obtained by converting a video signal of the three primary colors composed of one red pixel as a red signal pixel and one blue pixel as the blue signal pixel into a luminance / color difference video signal is converted into an oblique lattice. A device that converts back to a video signal of the three primary colors format that has a pixel structure,
Scan conversion means for scanning and converting a luminance pixel which is a pixel of a luminance signal of the luminance / color difference format video signal, and outputting a first luminance pixel and a second luminance pixel as a result of the scanning conversion;
The first luminance pixel and the second luminance pixel that are scanned and output by the scan conversion means, the blue color difference pixel that is a pixel of the blue color difference signal of the video signal of the luminance / color difference format, and the luminance / color difference format First green pixel generation means for generating the first green pixel from a red color difference pixel that is a pixel of a red color difference signal of the video signal of
Second green pixel generation means for generating the second green pixel from the first luminance pixel and the second luminance pixel, the blue color difference pixel, and the red color difference pixel;
Blue pixel generating means for generating the blue pixel from the first luminance pixel and the second luminance pixel, the blue color difference pixel, and the red color difference pixel;
A red pixel generating means for generating the red pixel from the first luminance pixel and the second luminance pixel, the blue color difference pixel, and the red color difference pixel;
A video format reverse conversion program characterized by functioning as

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