KR19990051689A - Digital television screen 90。 Screen size correction device when rotating - Google Patents

Abstract

The present invention relates to a screen size correction device for rotating a 90 ° screen of a digital television that can be displayed by rotating the screen angle by 90 ° in a digital television. In order to eliminate the size imbalance of the screen generated when the screen is rotated by 90 °, the received analog video signal is converted to digital and data is stored in the memory for each frame in units of one frame. The digital television screen that corrects the screen through sampling that reduces the data on the horizontal axis and enlarges the data on the vertical axis in the digital signal output from the upper right part to the lower left part in the vertical direction when rotated by 90 ° from the address. Screen size correction device is shown at 90 ° rotation.

Description

Digital television screen 90。 Screen size correction device when rotating

The present invention relates to a screen size correction device for rotating a 90 ° screen of a digital television that can be displayed by rotating the screen angle by 90 ° in a digital television.

Digital television converts a conventional image processing method from analog to digital. The digital method is a technology having the following advantages. First, high picture quality can be achieved. In the recording and transmission of the video signal, the distortion caused by the distortion of the waveform and noise is interrupted. In the analog signal, since the waveform is recorded or transmitted as it is, the distortion and noise of the waveform are reproduced as they are. Digitally, however, waveforms are displayed numerically, so even if a certain amount of disturbance is input, distortion of the fundamental waveform is not allowed unless there is a change in the numerical value. Second, in the processing and processing of video signals, digital broadcasting has a much higher tolerance value and a higher degree of utilization than analog broadcasting. For example, it is almost impossible to realize that a memory that can store a single screen by an analog signal method is limited by capacity. However, the digital method can be easily achieved by using a frame memory when freely changing or processing the screen such as dividing, reducing or rotating the screen. The task is to use semiconductor memory and digital is much better than analog. Third, digital signals do not need to be adjusted during operation compared to analog signals, and reliability is very high. In order to assemble or complete an electronic device using an existing analog circuit, even if the device is completed after wiring by design, the adjustment driver must be used to touch the volume or coil for various adjustments. However, in the case of digital, the above inconveniences are eliminated compared to analog circuits unless there is an error such as incorrectly connected wiring when the design, assembly, or wiring is completed. Fourth, because digital signals do not use unsampled signals, a lot of empty spaces can be created on the time axis. This space can be used to transmit other information. This is called TIME SHARING MULTI-TRANSPORT PROCESSING. To go through this process in analog, complex additional devices such as frequency demodulation or modulation and demodulation circuits are required. Fifth, it has a so-called programmable feature that can easily change its function or performance when designing the same circuit to produce a product. For example, in the production of TV receivers, there is a difference in the manner of each country, so the analog circuit requires a different circuit of the television. However, this problem is solved by making an IC that can cope with any method, which is only possible in the digital method.

When the screen is rotated 90 ° in a digital television using the digital system as described above, the aspect ratio of the television with 4: 3 or 16: 9 aspect ratio does not match the aspect ratio. If the horizontal screen of the long ratio goes vertically, and the vertical screen of the short ratio goes horizontally, there is a problem that the entire screen can not be displayed in the water hall.

The present invention has been made to solve the above problems, an object of the present invention is to sequentially store the stored data in the frame-by-frame and display the screen in the method of processing the screen to the bottom right from the upper left to the right in order The angle of the screen is emitted 90 degrees from the top left to the bottom right in the vertical direction so that the angle of the screen can be rotated by 90 °. It is to provide a screen size correction device for digital television screen rotation of 90 ° of digital television which increases and decreases the ratio of the increase and decrease through sampling process.

1 is a block diagram for explaining a screen size adjustment device when rotating the screen 90 ° of the digital television

2 is a diagram in which each image data is addressed on a digital screen.

3 is a view showing an image and a corrected image appearing in the water pipe when rotated 90 ° in the digital screen

4 is a flow chart for explaining the operation of the screen size correction device when rotating the screen 90 ° of the digital television

<Description of the symbols for the main parts of the drawings>

10 antenna 15 tuner section

20: intermediate frequency amplifier 25: A / D conversion unit

30: integrated signal processing unit 35: memory unit

40: sampling part 45: D / A conversion part

50: RGB output section 55: CRT

60: remote controller 65: microcomputer

Hereinafter, with reference to the accompanying drawings, the configuration and operation of the embodiment for achieving the above object will be described.

FIG. 1 is a block diagram illustrating a screen size correction device when a screen is rotated by 90 ° of a digital television.

Referring to FIG. 1, the present invention provides a tuner unit 15 for converting a high frequency signal of a desired channel from a high frequency signal received through an antenna 10 into an intermediate frequency which is easy to amplify, and the tuner unit 15. And an intermediate frequency amplifier 20 for amplifying the intermediate frequency applied from the tuner unit 15 to a size suitable for display on the water pipe, and the intermediate frequency amplifier 20, An A / D converter that samples the video signal applied from the intermediate frequency amplifier 20 at a predetermined interval from an analog signal, quantizes the sampled discrete signal into a numerical value, and converts the digital signal into a binary coded digital signal. (25), and stores the digital signal converted by the A / D conversion section 25 in the memory section 35, and separates the luminance signal and the color signal from the digital signal and outputs data in sequential scanning. A comprehensive signal processing section 30, a memory section 35 for data-processing and storing digital signals applied by the overall signal processing section 30 in units of frames, and a memory section 35 connected to the memory section 35; 35. The sampling unit 40 and the digital signal outputted from the integrated signal processing unit 30 are sampled by sampling the data stored and outputted, and reducing the horizontal axis data of the frame and enlarging the vertical axis data. D / A converter 45 for converting a video signal into an analog video signal, RGB output unit 50 for outputting R, G, B color signals from the analog video signal output from the D / A converter 45 And a CRT 55 for displaying the image signal output from the RGB output unit 50 on the screen, and outputting the digital image signal stored in the memory unit 35 when the screen is rotated by 90 ° while controlling all the above functions. Of the address of a frame video signal A microcomputer 65 for controlling output from the upper side to a lower right portion vertically, and controlling the sampling unit 40 to increase or decrease the number of data by sampling the data output from the memory unit 35; And a remote controller 60 for wirelessly applying a signal for television operation.

Referring to Figure 1 the operation of the present invention configured as described above is as follows.

The high frequency signal applied through the antenna 10 is applied to the tuner unit 15, and the tuner unit 15 receives a high frequency signal corresponding to a channel selected from the high frequency signals applied through the antenna 10. (20) converts and amplifies the intermediate frequency, which is likely to be heavy, to generate a composite video signal. The composite video signal is applied to the A / D converter 25, and the A / D converter 25 samples the analog video signal at predetermined intervals and quantizes the sampled discrete signal numerically. Convert to a digital video signal encoded with a binary code. The video signal converted into digital by the A / D conversion unit 25 is applied to the integrated signal processing unit 30 so that the digital video signal is stored in the memory unit 35, and the luminance signal and the color signal in the digital video signal. When outputting the stored digital image signal, and outputs the data in a sequential scanning method under the control of the microcomputer (65). In the above, when the user switches the 90 ° rotation of the screen using the remote controller 55, the microcomputer 65 converts the output method of the digital video signal stored in the memory unit 35 so that the screen rotates 90 °.

The above process is described with reference to FIGS. 2 and 3 as follows.

2 is a diagram in which each image data is addressed in a digital screen.

3 is a view showing an image and a corrected image appearing in the water pipe when rotated 90 ° in the digital screen.

Referring to FIG. 2, in general digital image processing, a screen is stored and processed in units of frames. As shown in FIG. 2, each stored method has an address by data-forming image information of pixel points constituting the screen and has unique data for each address. When outputting the stored information as described above, for example, addresses 001000 to 001001, 001002, ..., 001FFF, 002000, 002001, ..., 525FFE, 525FFF, that is, from the upper left of the screen frame to the right Are sequentially output to the lower right in the direction, and the digital signal is displayed on the screen. In the above, in order to rotate the screen by 90 °, the output method is to address 001000, 002000, ..., 524000, 525000, 001001, ..., 524FFF, 525FFF, that is, the vertical direction from the upper left of the screen frame. In order to switch to the bottom right output sequentially. As shown in FIG. 3, (a) is a display image of a character 'A B' having an aspect ratio of 16: 9 displayed by a general data output method, and (b) is converted. The display image of the letter 'A B' rotated by 90 ° according to the output method, and (c) is an image corrected by sampling. As can be seen from the figure above, when the screen is actually rotated 90 °, the horizontal axis is changed to the vertical axis and the vertical axis is changed to the horizontal axis. That is, the 16 ratio screen is moved to the vertical axis, and the 9 ratio screen is moved to the horizontal axis. As a result, the correct appearance of 'A B' is not displayed. In the image data output from the memory unit 35, the sampling unit 40 is the data of the horizontal axis of (a) that is increased by 90 ° rotation under the control of the microcomputer 65, that is, 001000, 001001, ... ., 001FFE, 001FFF, 002000 ...... etc., sampled and reduced to fit the actual size and output to the vertical axis of (b), and the data of the vertical axis of (a) reduced by 90 ° rotation. That is, data such as 001000, 002000, ..., 524000, 001001, 002001 ... are sampled and increased to fit the actual size and output on the horizontal axis of (b) to be shown in (c). Even if you rotate 90 ° as shown in the picture, the screen is rearranged to fit the screen size.

The digital video signal sampled by the above process is applied to the integrated signal processor 30 and is converted into an analog video signal by the D / A converter 45 to be displayed on the screen. The analog video signal converted by the D / A converter 45 is output as a color signal from the RGB output unit 50 and finally displayed on the CRT 55.

In the above process, the operation of the screen size correction device when the screen is rotated by 90 ° of the digital television will be described with reference to the detailed flowchart.

4 is a flow chart for explaining the operation of the screen size correction device when rotating the screen 90 ° of the digital television

Referring to Figure 4, the user turns on to watch the digital television (S100).

After the power is turned on in step S100, the A / D converter 25 converts the analog video signal, which has been tuned and amplified to an intermediate frequency, into digital (S200).

The video signal converted into digital in step S200 is addressed and stored for each image data in the memory unit 35 by one frame (S300).

In order to display the image digital data addressed and stored in step S300, the user determines whether to output 90 ° by rotating the output method using the remote controller 60 (S400).

If the user wants to output in the conventional manner according to the result determined in step S400, the microcomputer 65 outputs the data output method stored in the memory unit 35 from the upper right to the right of the existing method at each address of the frame data. Direction to the lower left portion (S500), if the user wants to rotate 90 °, the microcomputer 65 in the vertical direction from the upper right portion at each address of the frame data output data stored in the memory unit 35 To output to the lower left (S600).

In order to correct the digital data output in step S600, the sampling unit 40 reduces the horizontal axis data and enlarges the vertical axis data in the output data (S700).

The digital video signal output from the processes S500 and S700 is converted into an analog video signal by the D / A converter 45 (S800).

The analog image signal output in step S800 is a color signal is output from the RGB output unit 50, and is displayed via the CRT (55) (S900).

Through all the above processes, the screen size correction device is implemented when the screen is rotated by 90 ° of the digital television.

As can be seen from the above description, in the present invention, in order to solve the size imbalance of the screen generated when the screen is rotated by 90 °, the received analog video signal is converted into digital and one frame is used. Data is stored in the memory for each address in units, and the data corresponding to the horizontal axis is reduced in the digital signal outputted from the upper right part to the lower left part in the vertical direction when rotated 90 ° in each address of one frame data. The data is displayed to fit the screen ratio even if the screen is rotated by 90 ° through the sampling operation to enlarge.

Claims (2)

In digital television, which has the function of converting analog video signal into digital image processing and rotating the screen 90 °, A / D conversion means for converting the analog video signal converted to the intermediate frequency received through the tuner into a digital video signal, Memory means for storing image data converted to digital by the A / D conversion means at each address on a frame basis; Sampling means for sampling or reducing or enlarging the amount of data when the image data stored in the memory means is outputted; Control means for controlling an output method of the image data stored in the memory means, and controlling a sampling process of the sampling means; And a D / A converting means for converting the digital video data outputted according to the control of the control means into an analog video signal so that the screen is rotated by 90 °. The method of claim 1, wherein the sampling means, When the digital image data stored in the memory unit 35 is output, the data corresponding to the size of the screen is obtained through a sampling operation in which the horizontal axis data is reduced and the vertical axis data is enlarged under the control of the microcomputer 65. Screen size correction device for screen 90 ° rotation of the digital television, characterized in that the output sampling unit 40.