KR100388840B1 - display processing system and controlling method therefor - Google Patents

Abstract

The present invention includes a microcomputer that analyzes digital image data input from an input data processor, loads an optimal scaling control signal, and generates and processes a gamma value control signal suitable for a type of display; A vertical scaling data processor for scaling adjacent n vertical line image data into one vertical line pixel signal according to a scaling control signal including the variable coefficient value of the microcomputer, and a scaling control signal including the variable coefficient value of the microcomputer; Therefore, the horizontal scaling data processing unit is configured to scale m vertical line pixel signals inputted from the vertical scaling data processing unit into one horizontal pixel signal, and outputs the vertical and horizontal lines of n × m type to be suitable for the type of display. And an adaptive gamma processing unit for correcting and outputting the input data according to the gamma value control signal of the microcomputer according to the characteristics of the corresponding display.

As described above, the present invention analyzes various types of image information sources to be input and executes a scaling function suitable for the image information source and a gamma value process suitable for display characteristics, thereby displaying the image data with the best image quality suitable for the input image data. .

Description

Display processing system and controlling method therefor}

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a display processing apparatus and a control method thereof, and in particular, to analyze various kinds of input image information sources and to perform a scaling function suitable for the image information source and a gamma value processing suitable for display characteristics, thereby making it suitable for input image data. A display processing apparatus for displaying image data with the best image quality and a control method thereof.

In general, a display processing apparatus configures a screen of a specific size to display image data on a screen of a display. For example, the display processing apparatus uses standards such as VGA, SVGA, XGA, SXGA, D-TV, and HD-TV. The screen configuration as described above usually executes an arithmetic function for processing the image data according to the resolution, for example, magnification and scaling up to greatly enlarge the image screen or part of the video screen. , Processing such as zooming, upsampling, and stretching.

Then, referring to the conventional display processing apparatus 100 as described above with reference to FIG. 1, various image data generating apparatuses, for example, an input data processor for digitally processing image data input from a PC 70 or a VCR 71 ( 72) and digital image data input from the input data processing unit 72 are subjected to video signal processing, for example, zooming and filtering processing, correcting colors according to the characteristics of the display, and then converting to image display data and timing of output signals. A video converting unit 73 for generating an image, a microcomputer 74 including the video converting unit 73 to control overall functions of the display processing apparatus, and the video according to a function control signal of the microcomputer 74; And a display driver 76 for displaying the image display data of the conversion unit 73 on the display 75.

One end of the microcomputer 74 is connected with an interface unit 77 for interfacing the signals of the components 72-n, and one end of the interface unit 77 generates a PLL for generating a system synchronization clock signal. A reference frequency generator 79 (hereinafter referred to as OSC) for generating a reference clock signal is connected to one end of the PLL 78.

Meanwhile, referring to the operation of the conventional display processing apparatus as described above, first, an image data generating apparatus, for example, a PC 70 or a VCR 71 is set up, and image data is input from the input data processing unit of the display processing apparatus 100 ( 72, the microcomputer 74 recognizes the digital signal, and digitally processes the image data input through the input data processor 72 and inputs the image data to the video converter 73. At this time, the PLL 78 divides the internal clock inputted from the OSC 79 at a constant frequency, and then inputs the system synchronization clock to the video converter 73 and the microcomputer 74 via the interface unit 77. Supply. Meanwhile, the video converter 73 performs zooming and filtering processing of digital image input data input according to the function control signal of the microcomputer 74, and corrects the gamma value by the color according to the characteristics of the connected display 75. Is converted and then output to the driver 76 of the display 75 according to the output signal timing generated using the synchronization signal input from the PLL 78. Then, the driver 76 of the display 75 displays the input image display data on the screen of the display 75 to form an image screen.

However, the conventional display processing apparatus as described above relates to various types of image input data, for example, text data of the PC 70, video signals of the VCR 71, and still image signals. Since the image input data is displayed on the display 75 because it is processed in the same manner without a defect, the image quality deteriorates. In addition, since the conventional apparatus cannot output image input data meeting the specifications of various types of display apparatuses to be connected, there is a problem in that optimal image quality cannot be displayed on a display.

Accordingly, the present invention has been invented to solve the above-mentioned conventional problems, and is analyzed by analyzing various types of image information sources to be input and performing a gamma value processing suitable for the display function and a scaling function suitable for the image information sources. It is an object of the present invention to provide a display processing apparatus and a method of controlling the same, which display image data with the best image quality.

Another object of the present invention is to display the image data by applying a different processing function according to the source of the input image information, there is no need to process unnecessarily standardized uniformly, so that the display processing apparatus functionality is also significantly improved It is to provide a processing apparatus and a control method thereof.

The present invention for achieving the above object is a microcomputer to analyze the digital image data input from the input data processing unit to load the optimal scaling control signal, to generate and process a gamma value control signal suitable for the type of display; A vertical scaling data processor for scaling adjacent n vertical line image data into one vertical line pixel signal according to a scaling control signal including the variable coefficient value of the microcomputer, and a scaling control signal including the variable coefficient value of the microcomputer; Therefore, the horizontal scaling data processing unit is configured to scale m vertical line pixel signals inputted from the vertical scaling data processing unit into one horizontal pixel signal, and outputs the vertical and horizontal lines of n × m type to be suitable for the type of display. And an adaptive gamma processing unit for correcting and outputting the input data according to the gamma value control signal of the microcomputer according to the characteristics of the display.

Another feature of the present invention is an input / output source analysis step of analyzing the unique characteristics of the image data currently input in the image signal processing system and analyzing the type of the connected display from user input information, and after the input / output source analysis step. An optimal scaling execution step of calculating an optimal scaling factor value based on the analysis result of the analyzed input / output source and setting the value in a corresponding register and scaling and outputting the currently input image data using the set variable coefficient value; And a gamma value correction output step of correcting a gamma value to a color suitable for a characteristic of a connected display after the optimal scaling execution step and outputting the result to a display.

1 is an explanatory diagram illustrating a conventional image processing system.

2 is a convex view illustrating the device of the present invention.

3 is a convex diagram illustrating a vertical scaling data processing unit of the present invention;

4 is a convex diagram illustrating a horizontal tm scaling data processing unit of the present invention;

5 is a flowchart of the present invention.

<Description of the sign>

1: PC 2: TV

3: VTR 4: Input data processing unit

5: display 6: display processing apparatus

7: microcomputer 8: adaptive zoom / filter unit

9: adaptive gamma processing unit 10: vertical scaling data processing unit

11: horizontal scaling data processor 12: coefficient setting buffer

13: line buffer 14: multiplier

15: Adder 16: Linebuffer Controller

17: Counting setting buffer 18: Pixel part

19: Multiplier 20: Adder

21: horizontal zoom controller 22: output signal processing unit

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, the present invention provides an input data processor 4 for digitally processing input image data input from various image input data sources, for example, a PC 1, a TV 2, or a VTR 3. As shown in FIG. And the digital image data inputted from the input data processor 4 to load the optimal scaling control signal, generate a gamma value control signal suitable for the type of the display 5, and display the apparatus 6. Input image data according to the type of display 5 according to the microcomputer 7 for controlling the function of the control panel and the scaling control signal including the variable coefficient value loaded by the microcomputer 7, The adaptive zoom / filter unit 8 scales and outputs m-type vertical and horizontal lines, and inputs data according to the gamma value control signal of the microcomputer 7 so as to suit the characteristics of the display. An adaptive gamma processing unit 9 for correcting and outputting is included.

In addition, the adaptive zoom / filter unit 8 converts adjacent n vertical line image data, for example, four vertical line image data, into one vertical line according to a scaling control signal including a variable coefficient value of the loaded microcomputer 7. M vertical line image data input from the vertical scaling data processor 10 according to a scaling control signal including a vertical scaling data processor 10 scaling with a signal and a variable coefficient value of the loaded microcomputer 7, for example, A horizontal scaling data processing unit 11 for scaling four vertical line image data to one pixel is included.

In addition, the vertical scaling data processing unit 10 includes a plurality of coefficient value setting buffers 12a-d for setting a variable coefficient value signal separately loaded from the microcomputer 7, as shown in FIG. And a plurality of, for example, four line buffers 13a-d for storing one vertical line image data corresponding to and inputted to each of the coefficient value setting buffers 12a-d, and the respective coefficient value setting buffers. A multiplier composed of a plurality of multipliers 14a-d for multiplying the vertical line image data stored in the respective line buffers 13a-d according to the coefficient setting values of 12a-d, and An adder 15 that adds n vertical line image data output from each of the multipliers 14a-d and outputs one vertical scaling data pixel, and is connected to each of the line buffers 13a-d and line buffers. Liner controlling the processing speed of (13a-d) A fur controller 16 is included.

Meanwhile, as shown in FIG. 4, the horizontal scaling data processing unit 11 sets a plurality of coefficient value setting buffers 17a-d for setting variable coefficient signal signals which are individually loaded from the microcomputer 7. And a plurality of, for example, four corresponding to each of the coefficient setting buffers 17a-d and sequentially receiving and storing the vertical scaling data pixels respectively outputted from the adder 15 of the vertical scaling data processing unit 10. Multiplying the vertical scaling data stored in the corresponding pixel portion 18a-d and the corresponding pixel portion 18a-d according to the coefficient setting value of each coefficient value setting buffer 17a-d. A multiplier consisting of four multipliers (19a-d), an adder (20) for adding m vertical scaling data output from each of the multipliers (19a-d) and outputting one horizontal scaling data; remind Is connected to the cell unit (18a-d) comprises a horizontal zooming controller 21 that controls the processing speed of each pixel unit (18a-d).

In this case, the horizontal scaling data pixel output from the adder 15 of the horizontal scaling data processor 11 is a pixel signal that has already been scaled in the vertical direction by the vertical scaling data processor 10, and thus the horizontal scaling data processor 11 is used. The actual pixels obtained by are represented in the form of scaled n × m image data.

In addition, an output signal processor 22 is connected to an output terminal of the adaptive gamma processor 9 to perform signal correction on the output video and audio data signals at a predetermined level. The other end of the output signal processor 22 is connected with various types of displays, such as LCD panels, CRTs, HD-TVs and the like.

One end of the microcomputer 7 is connected with an interface 23 for interfacing the signals of the components 4-9, and one end of the interface 23 is a PLL for generating a system synchronization clock signal. 24 is connected, and one end of the PLL 24 is connected to a reference frequency generator 25 (hereinafter referred to as OSC) for generating a reference clock signal.

The following describes the method of the present invention applied to such a system.

As shown in FIG. 5, the method of the present invention first proceeds to an input / output source analyzing step S2 in an initial state S1 and analyzes whether a unique characteristic of the image data currently input, for example, VGA (640 × 480). In addition, the type of the connected display is analyzed from user input information. After the input / output source analyzing step S2, the process proceeds to the optimal scaling execution step S3 to calculate an optimal scaling factor value based on the analysis result of the input / output source analyzed by the input / output source analyzing step. The video data currently being input is scaled and output using the set variable coefficient value.

In addition, during the optimal scaling execution step (S3), the coefficient value of the filter is also calculated and applied to generate and apply a gamma value suitable for the characteristics of the display currently connected to the system.

On the other hand, after the optimal scaling execution step (S3) proceeds to the scaling determination step (S4) to determine whether the scaling process currently being executed is finished, and if the scaling process is not completed, return to the previous step (3) Iterate through the loop However, when the scaling process being executed is completed as a result of the determination in the scaling determination step (S4), the gamma value correction output step (S5) is performed to correct the gamma value to a color suitable for the characteristics of the connected display and then display the display. Output

In other words, various image data generating apparatuses connected to the system of the present invention, for example, any one of the PC 1 or the VTR 3 is set up, and when the image data is input from the input data processor 4 of the present invention, the microcomputer 7 ) Is digitally processed through the input data processing unit 4 and then received via the interface unit 23, and the spec information for the display 5 currently connected to the present system through the key panel (not shown) is also shown. You will receive an input. At this time, the PLL 24 divides the internal clock inputted from the OSC 25 at a predetermined frequency through the interface unit 23, and then the adaptive zoom / filter unit 8, the adaptive gamma processing unit 9, and the microcomputer 7 The synchronous clock is supplied by input to the main components of the system.

Then, the microcomputer 7 analyzes the input image data source inputted from the input data processing unit 4 and the specification information of the display 5. For example, the input image data is VGA (640 × 480). If the connected display (5) is a TFT-LCD panel of XGA (1024 × 768), the microcomputer (7) comprehensively analyzes the information to determine the optimal scaling algorithm and scaling factor. Calculate That is, the microcomputer 7 converts the calculated optimal scaling factor values as shown in FIGS. 3 and 4 to the coefficient value setting buffers 12a-d and 17a-d of the vertical and horizontal scaling data processing units 11. ) And control the line buffer controller 16 and the horizontal zooming controller 21 with an optimal scaling algorithm.

The coefficient setting buffers 12a-d and 17a-d may be set differently for each buffer according to the characteristics of the display. In addition, the microcomputer 7 calculates and sets the coefficient value of the filter during the process, generates a gamma value to be corrected to a color suitable for the characteristics of the current display 5, and then adapts the gamma processing unit 9 through the interface unit 23. Enter

On the other hand, as in the above process, the microcomputer 7 loads the optimal scaling factor values into the corresponding setting buffers 12a-d and 17a-d and the controllers 16 and 21, and then executes scaling. One vertical line image data is sequentially input and stored from the input data processor 4 to each line buffer 13a-d of the vertical scaling data processor 10. Then, the line buffer controller 16 of the vertical scaling data processing unit 10 divides n pieces of data stored in each line buffer 13a-d according to the timing set by the microcomputer 7, for example, into each multiplier ( 14a-d), respectively, wherein the coefficient value setting buffers 12a-d corresponding to the line buffers 13a-d also receive coefficient signals according to the corresponding coefficient values, respectively. Enter (14a-d). Accordingly, each of the multipliers 14a-d individually stores the vertical line image data stored in each of the line buffers 13a-d corresponding to the coefficient setting values of the respective coefficient value setting buffers 12a-d. It is multiplyed and input to the adder 15. That is, when the line buffers 13a-d and the coefficient value setting buffers 12a-d are four, the multipliers 14a-d output four outputs to the adder 15. Then, the adder 15 adds the vertical line image data signals input from a plurality of multipliers 14a-d, for example, four multipliers 14a-d, and the horizontal scaling data processor 11 in the form of one vertical scaling data. Are sequentially input to the individual pixel portions 18a-d and stored.

That is, one line is made on the display 5 using n vertical lines adjacent to each other for vertical scaling.

Accordingly, m, for example, four horizontal storage controllers 21 of the horizontal scaling data processing unit 11 stored in each individual pixel unit 18a-d according to the timing set by the microcomputer 7 after the vertical scaling process. When data is input to each multiplier 19a-d, the coefficient value setting buffers 17a-d corresponding to the respective pixel units 18a-d also have coefficients according to the corresponding coefficient values set. The signal is input to each corresponding multiplier 19a-d. Thus, the respective multipliers 19a-d individually store the vertical scaling data stored in the respective pixel units 18a-d corresponding thereto according to the coefficient setting values of the respective coefficient value setting buffers 17a-d. Multiplying and input to the adder 20. That is, when the individual pixel units 18a-d and the coefficient value setting buffers 17a-d are each four, the multipliers 19a-d output four outputs to the adder 20. Then, the adder 20 adds the vertical scaling data signals inputted from a plurality of multipliers 19a-d, for example, four multipliers 19a-d, and outputs them as one horizontal scaling data. Then, the adaptive zoom / filter unit 8 filters the horizontal scaling data by the set filter value and then inputs it to the adaptive gamma processing unit 9.

In this case, the horizontal scaling data pixel output from the adder 20 of the horizontal scaling data processing unit 11 is a pixel signal that has already been scaled in the vertical direction by the vertical scaling data processing unit 10. The actual pixels obtained by are represented in the form of scaled n × m image data. Also, when the input signal is VGA and the display is XGA, for example, when the input source is VGA and the display is XGA, adjacent image pixel data is 16 when scaling to form one pixel. (4 x 4) pieces are used. The coefficient values of the coefficient value setting buffers 17a-d of the horizontal scaling data processing unit 11 change for each pixel, and an address value for accessing these coefficient values is determined by the horizontal zooming controller 21.

Meanwhile, the adaptive gamma processing unit 9 corrects the scaling data of the type n × m input from the adder 20 of the adaptive zoom / filter unit 8 to an optimal color according to a gamma value preset by the microcomputer 7. Then, output to the output signal processor 22. Then, the output signal processor 22 amplifies the input scaling image data and the audio data synchronized with the amplified signal to a predetermined level and outputs the amplified signals to the driver 26 of the corresponding display 5. Therefore, this driver 26 causes the display 5 to display the scaling video data output from the output signal processing section 22.

For example, according to the present invention, in order to further emphasize the moving picture, the optimum resolution can be obtained by adjusting the coefficient value of the adaptive zoom / filter unit 8 by a corresponding level.

As described above, the present invention analyzes various types of image information sources to be input, performs scaling functions suitable for the image information sources, and performs gamma value processing suitable for display characteristics, thereby displaying the input image data with the best image quality. It has advantages.

According to the present invention, since the image data is displayed by differently applying the processing function according to the source of the input image information, there is no need to process unnecessarily standardized jobs uniformly, and thus the functionality of the display processing apparatus is also considerably improved. have.

Claims (6)

An image signal processing system comprising an input data processor for digitally processing image data input from various image input sources, A microcomputer that analyzes digital image data input from the input data processor, loads an optimal scaling control signal, and generates and processes a gamma value control signal suitable for a type of display; A vertical scaling data processor for scaling adjacent n vertical line image data into one vertical line pixel signal according to a scaling control signal including the variable coefficient value of the microcomputer, and a scaling control signal including the variable coefficient value of the microcomputer; Therefore, the horizontal scaling data processing unit is configured to scale m vertical line pixel signals inputted from the vertical scaling data processing unit into one horizontal pixel signal, and outputs the vertical and horizontal lines of n × m type to be suitable for the type of display. An adaptive zoom / filter unit; And an adaptive gamma processing unit for correcting and outputting the input data according to the gamma value control signal of the microcomputer to suit the characteristics of the corresponding display. delete 2. The apparatus of claim 1, wherein the vertical scaling data processing unit comprises a plurality of coefficient value setting buffers for setting variable coefficient value signals separately loaded from a microcomputer, and one vertical line corresponding to and inputting each of the coefficient value setting buffers. A multiplier comprising a plurality of line buffers for storing image data, a multiplier for multiplying vertical line image data stored in respective line buffers according to the coefficient setting values of the respective coefficient value setting buffers, And an adder for adding n vertical line image data output from each to output one vertical scaling data pixel signal, and a line buffer controller connected to the line buffer to control the processing speed of each line buffer. Display processing apparatus. The vertical scaling data processing unit of claim 1, wherein the horizontal scaling data processing unit comprises a plurality of coefficient value setting buffers configured to set variable coefficient value signals that are separately loaded from a microcomputer, and corresponding to each of the coefficient value setting buffers. Multi-plying the vertical scaling data stored in each pixel portion corresponding to the coefficient setting value of each coefficient value setting buffer and a plurality of pixel portions sequentially receiving and storing the vertical scaling data pixels output from the adder, respectively A multiplier composed of a plurality of multipliers, an adder for adding m vertical scaling data output from each of the multipliers, and outputting the result as one horizontal scaling data, and a horizontal zoom controller connected to the pixel unit to control the processing speed of each pixel unit. Display comprising a The processing apparatus. The input / output source analysis step of analyzing the unique characteristics of the image data currently input in the image signal processing system and the type of the connected display from the user input information, and the analyzed input / output source after the input / output source analysis step. An optimal scaling execution step of calculating an optimal scaling factor value based on the result and setting it in a corresponding register and scaling and outputting the currently input image data using the set variable coefficient value; And a gamma value correction output step of correcting the gamma value with a color suitable for the characteristic of the display and outputting the gamma value to the display. 6. The method of claim 5, further comprising calculating and setting a coefficient value of the filter and calculating a gamma value suitable for a characteristic of a display currently connected to the system during the optimal scaling execution step.