WO2004093456A1 - Dispositif de transmission de donnees d'image numeriques, dispositif de reception et systeme de transmission de donnees d'image numeriques - Google Patents

Dispositif de transmission de donnees d'image numeriques, dispositif de reception et systeme de transmission de donnees d'image numeriques Download PDF

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Publication number
WO2004093456A1
WO2004093456A1 PCT/JP2003/008474 JP0308474W WO2004093456A1 WO 2004093456 A1 WO2004093456 A1 WO 2004093456A1 JP 0308474 W JP0308474 W JP 0308474W WO 2004093456 A1 WO2004093456 A1 WO 2004093456A1
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WIPO (PCT)
Prior art keywords
data
image data
frame
group
image
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PCT/JP2003/008474
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English (en)
Japanese (ja)
Inventor
Noboru Hirano
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Ses Japan Co., Ltd.
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Publication of WO2004093456A1 publication Critical patent/WO2004093456A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/12—Systems in which the television signal is transmitted via one channel or a plurality of parallel channels, the bandwidth of each channel being less than the bandwidth of the television signal

Definitions

  • Digital surface image data transmission device reception device, and digital image data transmission system
  • the present invention relates to a digital image data transmitting apparatus and a digital image data receiving apparatus that reduce the data amount to approximately 1/2 and perform optimal data division in a moving direction (change) direction of a specific image in a plurality of transmitted image frames.
  • the present invention relates to a digital image data transmission system.
  • the device described in Patent Document 2 relates to a digital image transmitting device or a receiving device that transmits or receives digital image data via a data line or wirelessly, although it uses half the data of one frame of original image data. Not something
  • the unit of data division is a line, and the method of dividing frame data is not adapted to the direction of change (movement) of a specific image in original image data (between multiple frames).
  • Patent Document 1 Japanese Patent Application Laid-Open No. 7-322202
  • Patent Document 2 Japanese Patent Application Laid-Open No. 2000-16659
  • An object of the present invention is to solve the above-mentioned problem.
  • An object of the present invention is to reduce the amount of transmitted digital image data to improve the efficiency of use of a data line, and to reduce the amount of transmitted digital image data from original digital image data. Creating image data that is comparable to that.
  • an object of the present invention is to divide original image data into two data groups according to a predetermined data division pattern, and to generate transmission digital image data by alternately selecting and extracting one of the data groups.
  • the purpose is to reduce the amount of data and improve the efficiency of data line utilization.
  • an object of the present invention is to select transmission data division patterns that match the moving direction (change) direction of a specific image in a transmission image, so that transmission digital image data comparable to original digital image data can be obtained. Is to create. .
  • one of the first image data group (DA) and the second image data group (DB) is alternately and sequentially selected and extracted.
  • the previous frame data comprising the first image data group (DA) (or the second image data group (DB)) and the second image data group (DB) (or the first image data group (DA) ) and the current frame data F n consisting of the Ru sequentially alternately repeated (e.g., the first image data group (DA) frame data consisting of the frame data F 2 consisting of the second image data group (DB), first frame data F n _ 2 consisting of first image data group (DA) frame data F 3 second image data group consisting of (DB), F n _i composed of the first image data group (DA), the - second image data group consisting of the frame data F n consisting of (DB)) transmitted image data (DT) Create, write the selected data division pattern name (type) in the first frame data of the transmission image data (DT), and compress the transmission image data (DT) via
  • the predetermined data division pattern may be a horizontal division, a vertical division, an oblique division, a concentric division, or a concentric polygon division adapted to a moving direction (change) of a specific image in a transmission image frame.
  • the digital image data transmitting apparatus according to the above (1) which is a combination of any one or more of random divisions.
  • the predetermined data division pattern includes a first data division pattern and a second data division pattern
  • the first data division pattern is a first data division pattern. It is used as a data division pattern for the image data group (DA), and “1” is used as valid data of each pixel data of the first image data group (DA), and “0” is used as invalid data of each pixel data.
  • the second division pattern is used as a data division pattern for the second image data group (DB), and the effective data of each pixel data of the second image data group (DB) is arranged.
  • the digital image data transmitting apparatus wherein “1” is set as “1”, and “0” is set as invalid data of the pixel data.
  • the generation of the transmission image data (DT) is performed by dividing a frame number of image data of each frame by an integer “2” to calculate a “remainder”, and calculating the “remainder”.
  • a digital image data transmitting device according to (1), (2) or (3).
  • the generation of the transmission image data (DT) may include the step of generating one of the two data division patterns described in (3) above for the odd-numbered frame image data, The other data division pattern is used as mask data for the image data, and the image data of each frame is masked by the data division pattern to generate transmission image data (DT) (1), (2) Or a digital image data transmitting device according to (3). .
  • the creation of the transmission image data (DT) may include selecting a predetermined data division pattern suitable for a moving direction of a specific image on the screen of the original image data from the plurality of data division patterns.
  • a digital image data receiving apparatus for decompressing the transmission image data (DT) to create pseudo image data (DL) to be used as reproduction image data; Frame data consisting of the first image data group (DA) (or second image data group (DB)) and frame data consisting of the second image data group (DB) (or first image data group (DA)) frame data F n and the first image data group converted transmission image data sequentially repeated alternately '(DT) from the previous frame F (n- 1) (DA) ( or the second image data group (DB)) And pseudo image data (DL) consisting of the second image data group (DB) (or first image data group (DA)) of the current frame F (n) are sequentially created and entered in the first frame data.
  • each image data of the first image data group (DA) of the previous frame F (n-1) is reproduced. And rearranged as respective image data of the first image data group (DA) of each frame of the current frame.
  • a digital image data receiving unit that rearranges each image data of the second image data group (DB) of F (n) as each image data of the second image data group (DB) of each frame for a reproduced image.
  • the digital image data receiving apparatus shifts in the outline (edge) of the image of the pseudo image data (DL), the small data group before representing the outline (edge)
  • the digital image according to (7) further comprising contour correction means for correcting a data portion indicating a contour (edge) of the image and a data portion indicating a contour (edge) of the image of the next small data group following the data portion. It is a data receiving device.
  • the contour (edge) correcting means may include a data portion indicating a contour (edge) of the image of the small data group before the contour (edge) of the image is shifted, and a next small data group.
  • the digital device according to (8) further comprising: a data smoothing unit that smoothes data of a data portion indicating an outline (edge) of the image or a data expansion and contraction unit that expands and contracts data of the outline (edge) portion.
  • the data smoothing means uses a smoothing filter such as a mask, a differential operator or an average filter, a median filter, a two-dimensional Wiener filter, or a high-pass filter.
  • a smoothing filter such as a mask, a differential operator or an average filter, a median filter, a two-dimensional Wiener filter, or a high-pass filter.
  • the data expansion / contraction means may include four neighboring pixels that are four pixels adjacent to a specific pixel vertically and horizontally and the four neighboring pixels or the four neighboring pixels.
  • the eight neighboring pixels obtained by adding the four neighboring pixels in the oblique direction to the specific pixel, if there is any black information in the four neighboring pixels or the eight neighboring pixels, the information of the particular pixel is set to black, Only when all the neighboring pixels are white, the information of the specific pixel is set to white.
  • the information of the specific pixel is set to white if at least one white information exists in the 4 neighboring pixels or 8 neighboring pixels.
  • the digital image data receiving device according to the above (9), wherein information of a specific pixel is set to black only when all neighboring pixels are black. .
  • the transmission image data (DT) created by the digital image data transmission device according to any one of (1) to (6) is transmitted via a data line or wirelessly to (7) to (1).
  • a digital image data transmission system that is received by the digital image data receiving device according to 1),
  • FIG. 1A is a schematic configuration diagram of a digital image data transmission system including a digital image data transmission device and a digital image data reception device according to the present invention.
  • (B) of FIG. 1 is a diagram showing a process of creating transmission image data D T and pseudo image data D L from original image data D O in the digital image data transmission system of the present invention.
  • FIG. 2 is a diagram showing a processing operation of the digital image data transmitting device of the present invention.
  • FIG. 3 is a diagram showing a processing operation of the digital image data receiving device of the present invention.
  • FIG. 4A is a diagram showing a pixel configuration of one frame screen of original image data in the digital image data transmitting apparatus of the present invention.
  • FIG. 4 (b) is a diagram showing a method of dividing one frame of original image data (horizontal division) in the digital image data transmitting apparatus of the present invention.
  • FIG. 5 is a diagram showing a horizontal data division (mask) pattern used for selective extraction of one frame of original image data in the digital image data transmitting apparatus of the present invention.
  • FIG. 5 (b) shows the digital image data transmitting apparatus of the present invention.
  • FIG. 9 is a diagram showing a horizontal data division (mask) pattern used when selectively extracting one frame of original image data.
  • C) of FIG. 5 is a diagram showing a horizontal data division (mask) pattern used when selectively extracting one frame of original image data in the digital image data transmitting apparatus of the present invention.
  • FIG. 5D is a diagram showing a horizontal data division (mask) pattern used for selective extraction of one frame of original image data in the digital image data transmitting apparatus of the present invention.
  • FIG. 6 is a schematic configuration diagram of the data format of the original image data D O input to the digital image data transmission device of the present invention.
  • FIG. 7 is a diagram showing an operation flow of a process of creating transmission image data D T from original image data D O using the horizontal division pattern data in the digital image data transmission device of the present invention.
  • FIG. 8 is a diagram showing an operation flow of a process of generating transmission image data D T from original image data D O by mask processing using the horizontal division mask pattern data in the digital image data transmission device of the present invention.
  • FIG. 9 is a schematic configuration diagram of an image data correction unit in the digital image data receiving device of the present invention.
  • FIG. 10 shows an image ring (edge) correction processing operation in the image data correction unit in the digital image data receiving device of the present invention.
  • FIG. 11 is a diagram showing a time-series change of original image data D O, transmission image data D T, and pseudo image data in the digital image data transmitting device and the digital image data receiving device of the present invention.
  • the present invention relates to a data reduction type digital image data transmission device, a digital image data reception device, and a digital image data transmission system.
  • the digital image data transmission device (hereinafter referred to as the data transmission device) 2 a plurality of data division patterns registered in the division pattern table 24 are used.
  • the transmission destination selected by the division pattern selector 23 from According to a predetermined data division pattern adapted to the moving direction (change) direction of a specific image in a plurality of image frames, the transmission image data generation unit 22 converts each frame data of the original digital image data DO into an image. It is divided into the data group DA and the image data group DB, and either one of the image data group DA or the image data group DB is selectively extracted from the original digital image data DO, and the data amount is an abbreviation of the original digital image data DO.
  • transmission image data DT (enter the division pattern name in the first frame data) of 1/2 (data amount 1/2 n frames), and create a high-speed, large-capacity (for example, broadband) data circuit.
  • the transmission image data DT is transmitted to a digital image data receiving device (hereinafter, referred to as a data receiving device) 4 by high-speed wireless communication.
  • the image data of each frame is rearranged from the received transmission image data DT according to the data division pattern, and the previous frame F (n_l )) And pseudo image data DL (for n frames of data amount) consisting of the image data group DB (or image data group DA) of the current frame F (n) and the image data group DB (or image data group DA) of the current frame F (n). Then, an image is reproduced (displayed or printed) by the image reproducing device 5 using the pseudo image data DL. If there is a deviation in the outline of the pseudo image data DL, the image data correction unit 44 corrects the data.
  • the data transmitting apparatus selects digital image data having a data amount of approximately 1 to 2 according to a predetermined data division pattern for each frame of the original digital image data DO.
  • the transmission image data DT thus extracted is created, the transmission image data DT is compressed, and the image data is transmitted to the data receiving device 4 via a data line or wirelessly.
  • the original digital image data DO (for one screen) input to the data transmission device 2 is composed of a predetermined number n (n is a positive integer) of frame data F (Fi Fn).
  • n is a positive integer
  • each frame data F is image data for each of XxY pixels (X in the horizontal direction and ⁇ in the vertical direction) for one frame.
  • the data transmission device 2 of the present invention can be used for horizontal division, vertical division, diagonal division, and concentric polygon shape division (see FIG. 5) registered in the division (mask) pattern table 24.
  • the most suitable data division (mask) pattern in the moving direction (change) direction of a specific image in a transmission image frame is selected. Is selected by the division pattern selection unit 23.
  • the selected data division pattern data '(for example, horizontal division) the original digital image data DO and the image data group (DA) having substantially the same data amount as shown in FIG. Data group (DB), and each image data group is divided into a plurality of (successive or separated) small data groups of the same size (DA 1 DA 2... 0 11 and 138 1 DB 2... DB n) and are arranged such that the pixel position of each data area of the one small data group and the pixel position of each data area of the other small data group do not overlap.
  • the data transmission device 2 is selected from the divided pattern table 24 in the data selection and extraction unit 22A provided in the transmission image data generation unit 22.
  • one of the first image data group (DA) and the second image data group (DB) is selectively and sequentially extracted from each frame data F of the original digital image data DO.
  • the frame data F 2 consisting of frame Mudeta second group of image data DB including the first image data group DA
  • the frame data F 3 consisting of the first images data group DA
  • Second image data group DB It consists frame data F n - 2, consists of the frame data F n consisting of F n second images data group DB including the first image data group DA) to create a transmission image data DT.
  • the selected data division (mask) pattern name for example, P 1 is written.
  • the transmission image data DT is data-compressed and transmitted to a data receiving device 4 via a data line 3 such as a high-speed broadband (or by radio).
  • the data division pattern is the optimal one in the moving direction (change) direction of a specific image in a plurality of transmission image frames, and is divided horizontally, vertically, diagonally, concentrically, concentrically, and randomly. Select by combining one or more of. If the moving direction of the specific image has a sudden change in the horizontal direction, the horizontal division is used.If there is a sudden change in the vertical direction, the vertical division is used. If there is a sharp change from the center of the screen toward the periphery, concentric division or concentric polygon division is appropriate.
  • the image data of each frame is divided into a first image data group DA and a second image data group DB as shown in FIG. 4 (b).
  • a as the data division pattern for the image data group DA, "1" is used as valid data for each pixel data of the image data group DA, and "0" is used as invalid data for each pixel data.
  • a As the data division pattern for the image data group DA, "1” is used as valid data for each pixel data of the image data group DA, and "0" is used as invalid data for each pixel data.
  • “1” is used as valid data for each pixel data of the image data group DB
  • 0 is used as invalid data for each pixel data.
  • the first method of creating the transmission image data DT will be described below.
  • the frame number of the image data of each frame is divided by an integer “2” to calculate a “remainder”, and the numerical value of the “remainder” and the selected predetermined divided pattern data (for example, as shown in Fig. 5 (a), exclusive OR (Exclusive OR) operation is performed with each data of the horizontal data division (mask) pattern P1A), and the data whose operation result is "0" Select and extract the pixel data in the original image data at the position corresponding to each data of the division pattern, and create the transmission image data DT.
  • exclusive OR Exclusive OR
  • the horizontal data division (mask) pattern P1 is divided for the image data group DA group (mask)
  • Pattern data P1A and the image data group DB group is divided for the data group (Mask)
  • the case where the pattern P 1 B is used will be described.
  • the frame number is divided by the integer "2" to calculate the "remainder", and in the case of the "remainder” force S "1", , Odd-numbered frames, odd-numbered frame image data includes image data group DA group divided mask pattern data P 1 A, and “Remainder” is “0”, even-numbered frame images
  • the divided mask pattern data p IB for the image data group DB group is used as the mask data, and the image data of each frame is masked by the data division (mask) pattern, and each data division (mask) is performed.
  • the data receiving device 4 of the present invention transmits digital image data having a data amount of about 1/2 of each frame of the original digital image data DO.
  • the selected transmission image data DT is received, and a predetermined data division (mask) pattern is selected from the division pattern table 43 from the data division (mask) pattern name written in the first frame of the transmission image data DT,
  • the pseudo image data creation unit 42 rearranges the transmission image data DT, so that the pseudo image data DL f 2 and f 3 used as reproduction image data from the transmission image data DT. , F 4 ⁇ ), and reproduces (displays or prints) the pseudo image data DL by the image reproducing device 5. If there is a deviation in the outline of the pseudo image data DL, the data is corrected by the image data correction unit 44.
  • the converted transmission image data DT transmitted from the data transmission device 2 includes frame data including the first image data group DA (or the second image data group DB). in which the frame data F n of a second image data group DB (or the first group of image data DA) are sequentially repeated alternately.
  • the first image data of the previous frame F (n-1) is converted from the converted transmission image data DT.
  • a division pattern corresponding to the division pattern name (for example, P 1) in the first frame data of the pseudo image data DL is selected from the division pattern table 43, and according to the division pattern, the previous frame F ( n-1) of the first image data group DA of each frame (f 2 , f 3 , f 4 ...) To the second frame of the current frame F (n) of the pseudo image data DL.
  • Each frame have f 2 for each image data reproduced image of the image data group DB, f 3, a second image data of f 4 ⁇ ⁇ ⁇ ) The data is rearranged as each image data of the data group DB.
  • the contour (edge) of the image of the pseudo image data DL is shifted as shown in FIGS.
  • the image data correction circuit 44c of the correction unit 43 the data portion F1'DA1 indicating the contour (edge) of the image of the small data group before representing the contour (edge) and the next small data following the data portion
  • the data part F 2 ′ DB 1 indicating the outline (edge) of the group image is corrected.
  • the image data correction unit 43 calculates a data portion indicating the outline (edge) of the image of the small data group before the outline (edge) of the image has shifted and the outline (edge) of the image of the next small data group.
  • a data smoothing circuit for smoothing the data of the indicated data portion or a data expansion / contraction circuit for expanding / contracting the data of Z and the contour (edge) portion is provided.
  • the data smoothing circuit include a smoothing filter such as a mask, a differential operator or an average direct filter, a median filter, a two-dimensional Wiener filter, and a high-pass filter.
  • the data expansion / contraction circuit in the data expansion, four neighboring pixels, which are four pixels adjacent to the upper and lower sides and right and left of the specific pixel, or the four neighboring pixels and four pixels obliquely adjacent to the specific pixel.
  • the information of the specific pixel is set to black, and the information of the specific pixel is used only when all the neighboring pixels are white.
  • the information of the specific pixel is set to white, and only when all the neighboring pixels are black, the information of the specific pixel is set. Black. '
  • the digital image data transmission system 1 includes the data transmission device 2, the data reception device 4, and a high-speed broadcast Data line 3 (or wireless).
  • the data transmission device 2 includes a first image data group (DA) or a second image data group (DA) which is digital image data having a data amount of about 1/2 of each frame of the original image data DO.
  • DB first image data group
  • DA second image data group
  • the current frame consisting of the first image data group DA) Create a transmit image data DT and Mudeta F n are sequentially repeated alternately fill a predetermined splitting data pattern name selected in the beginning of the frame data of the transmission image image data DT, the data compression transmission image data DT Then, the data is transmitted to the digital image data receiving device 4 via the data line 3 (or wireless).
  • the data reception device 4 converts the transmission image data DT from the first image data group DA (or 2) and pseudo image data DL consisting of the second image data group DB (or the first image data group DA) of the current frame F (n) are sequentially created, and the beginning of the pseudo image data DL According to the division pattern corresponding to the division pattern name in the frame data, each image data of the first image data group DA of the previous frame F (n-1) of the pseudo image data DL is converted into a frame of each frame for a reproduced image.
  • the image data of the second image data group DB of the current frame F (n) of the pseudo image data DL is rearranged to each image data of the first image data group DA, and Each of the second image data group DB of the frame Rearrange as image data. If there is a deviation in the data portion indicating the outline (edge) of the image of each frame of the pseudo image data DL, the image data correction unit 44 is so small that the outline (edge) deviation is invisible. The image is corrected by the image correction circuit 44c.
  • original image data is divided into two data groups according to a predetermined data division pattern, and data obtained by alternately selectively extracting one of the data groups is transmitted as transmission digital image data.
  • data amount of transmission data can be reduced and the utilization efficiency of the data line can be improved.
  • the present invention creates transmission digital image data that is inferior to original digital image data by selecting a data division pattern that matches a moving direction (change) direction of a specific image in a plurality of transmission image frames. can do.
  • the selected data division pattern name is written only in the first frame of the transmission digital image data, it is possible to suppress an increase in the data amount of the transmission digital image data.
  • a deviation of a contour (edge) occurring in a data portion indicating a contour (edge) of an image of each frame is corrected by a correction circuit, and the deviation of the contour (edge) is invisible. Can be corrected.

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Abstract

Système de transmission dans lequel la quantité de données de transmission est réduite, mais des données d'image comparables à l'image originale sont créées. A cet effet, un dispositif de transmission (2) divise les données d'image originale D0 en deux groupes de données, DA et DB, selon un modèle de division prédéterminé, crée des données de transmission d'image DT en sélectionnant de manière séquentielle et en extrayant des données en alternance de ces deux groupes, enregistre un nom de modèle de division dans la première trame des DT, comprime les données et envoie les données comprimées à un dispositif de réception (4) via une ligne de données (ou via une onde radio). Le dispositif de réception (4) décomprime les données DT et, à partir desdites données DT, crée séquentiellement des données de pseudo-images d'images de reproduction DL qui sont composées du groupe de données DA (ou DB) dans la trame précédente et du groupe de données DB (ou DA) dans la trame en cours, selon un modèle de division correspondant au nom de modèle de division enregistré. S'il existe une différence dans les contours, le dispositif de réception (4) la corrige.
PCT/JP2003/008474 2003-04-16 2003-07-03 Dispositif de transmission de donnees d'image numeriques, dispositif de reception et systeme de transmission de donnees d'image numeriques WO2004093456A1 (fr)

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