KR100223782B1 - Video display direction and sub-picture processing suitable for television - Google Patents

Abstract

The present invention relates to a scanning direction switching display control apparatus for a video signal, and further comprising a control unit (12) for controlling a scanning direction change for the video IF signal under designation of a screen switching mode, and under the control of the control unit (12). A digital converter 30 and a sampling processor 32 for activating and digitally converting the image IF signal by a predetermined number of bits, and a data memory 42 in which the sampled image IF data is sequentially stored and read out in units of frames. ), A horizontal synchronous signal separator 34 and a horizontal field counter which separate a horizontal synchronous signal from the image IF signal and count the separated horizontal synchronous signal to provide a control signal for scanning direction switching of the image IF data. (36) A scanning direction switching cycle for the image IF data is performed by separating and sampling a vertical synchronization signal from the image IF signal and counting the sampled vertical synchronization signal. The scanning direction of the image IF data stored in the data memory 42 is determined based on the vertical synchronous signal sampling unit 38 and the vertical synchronous signal counter 40, the horizontal synchronous signal count result and the vertical synchronous signal count result. Image matrix processing unit 44 for reading and converting the matrix in the switched state, PIP processing unit 46 for compressing the image IF data matrix-processed in the scanning direction switching form into the PIP screen form, and the scanning direction is changed and PIP processing is performed. And an analog converter 48 for converting the converted image IF data to the image processor 18 and processing the color image signal of the CRT apparatus 20 into a scanning direction switching and a PIP screen. The color image of the CRT apparatus 20 is superimposed, and the size and position of the scanning direction switching PIP screened image signal displayed on the CRT apparatus 20 are variably set. One will.

Description

Scanning direction switching display control device of video signal

The present invention relates to a scanning direction switching display control apparatus for a video signal. More particularly, the present invention relates to a television, and to converts the entire scanning direction of the video signal onto a video signal displayed on the main screen of the CRT apparatus, thereby converting the PIP ( The present invention relates to a scanning direction switching display control apparatus for a video signal for superimposed display in a picture-in-picture form.

As is well known, according to a television which reproduces a video signal transmitted over-the-air or an external video signal provided in a wired manner, the video signal is usually upright in the vertical direction due to the structure of the CRT apparatus provided as a display means for the video signal. Will be displayed.

That is, the CRT apparatus employed in the television is R / G / B corresponding to the R / G / B color component of the video signal in the R / G / B electron gun arranged in the in-line form or the delta form. When the color beam is emitted, the R / G / B fluorescent beam reaches the corresponding R / G / B fluorescent point formed on the fluorescent panel in a state where the R / G / B electron beam is deflected in the horizontal and vertical directions by the action of the vertical and horizontal deflection systems. As the G / B fluorescent point emits light, a color screen is realized.

1 is a view showing a video signal processing system of a general television, reference numeral 10 denotes a remote control for remote control to selectively execute the overall functions of the corresponding television, and 12 denotes a remote control generated by the remote controller 10. A control unit in charge of execution of a specific function designated by a command, and 14 denotes a control unit according to the tuning data VT applied under the control of the control unit 12 to a specific channel designated as a target for tuning by the remote controller 10. Indicates a tuner that performs channel tuning.

16 denotes an image IF module for converting and processing a broadcast signal of a channel selected by the tuner 14 into a predetermined intermediate frequency IF, and 18 denotes an image IF signal provided by the image IF module 16. An image processing unit for reproducing and displaying on the CRT apparatus 20, 22 denotes a synchronization separating unit for separating horizontal / vertical synchronization signals from the image IF signal, and 24 denotes a synchronization separating unit 22; A horizontal deflection unit for performing a horizontal deflection for the CRT apparatus 20 based on a horizontal synchronizing signal, and 26 denotes a horizontal deflection unit for the CRT apparatus 20 based on the vertical synchronizing signal provided by the synchronization separating unit 22. A vertical deflection portion for performing vertical deflection is shown.

According to a television having a video signal processing system of such a configuration, when a remote control command for tuning of a specific channel is applied to the control unit 12, for example, by the remote controller 10, the control unit 12 is connected to the channel to be tuned. Tuning data VT is read from a tuning data memory (not shown) and applied to the tuner 14, so that a broadcast signal of a channel tuned by the tuner 14 is predetermined by the video IF module 16. The conversion process is performed by the intermediate frequency of to obtain an image IF signal. The image IF signal is applied to the image processing unit 18 and processed into an R / G / B color component and applied to the CRT apparatus 20. Accordingly, from the R / G / B electron gun of the CRT apparatus 20, The R / G / B color beam corresponding to the R / G / B color component of the video signal is emitted.

In addition, the sync separator 22 separates the horizontal / vertical sync signal from the video IF signal and applies it to the horizontal deflector 24 and the vertical deflector 26, and thus the horizontal deflector. 24 and the vertical deflection section 26 generate a horizontal deflection signal and a vertical deflection signal to perform horizontal / vertical deflection with respect to the R / G / B color beam emitted from the CRT apparatus 20. Accordingly, the R / G / B color beams emitted from the R / G / B electron guns of the CRT apparatus 20 are deflected in the horizontal and vertical directions to correspond to the R / G / B color components of the image signal to be formed on the fluorescent panel. A color image is reproduced on the screen of the CRT apparatus 20 by reaching the state evenly distributed to the R / G / B fluorescent point.

By the way, according to the CRT apparatus of the television shown in Fig. 1, the R / G / B color beam emitted from the R / G / B electron gun of the video signal in the R / G / B electron gun is R / G / B fluorescent light on the fluorescent panel. As the horizontal and vertical deflections by the horizontal and vertical deflection portions 24 and 26 are fixed while the point is reached, the screen of the color image displayed on the CRT device is always upright in the vertical direction. Will be displayed.

Thus, for example, when the viewer lies in the direction substantially intersecting with the screen display direction of the television, the viewing direction of the color image displayed on the CRT apparatus is shifted from the viewer's viewing attitude, thereby degrading the viewing feeling.

In view of such a point, recently, by changing the deflection direction by the horizontal deflection portion 24 and the vertical deflection portion 26 with respect to the color image displayed on the CRT apparatus, the scanning direction of the color image of the CRT apparatus is changed. Although a method of switching the color image screen displayed on the CRT device in the horizontal direction has been proposed, in this case, the screen of the CRT device is changed in the horizontal direction as a whole, so that a viewer having a viewing attitude in the horizontal direction can change the color image screen. The viewing becomes good, but there is a disadvantage that the viewer having the vertical viewing posture of the surroundings eventually causes the screen display direction of the color image to be switched to cause deterioration of the viewing feeling.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and in the form that the color image displayed on the CRT device is processed in the PIP form, the scanning direction is switched horizontally and superimposed on the color image signal displayed on the CRT device. It is an object of the present invention to provide an apparatus for controlling display direction switching of a video signal for simultaneously making a viewer feel good viewing feeling in a vertical / horizontal direction.

In order to achieve the above object, according to a preferred embodiment of the present invention, the image processing unit for processing the image IF signal applied from the image IF module to the R / G / B color component and the R / G / B color processed by the image processing unit A television equipped with a CRT apparatus for reproducing a component as a color image, comprising: a control unit for controlling a scanning direction change for the video IF signal under designation of a screen switching mode, and activated under the control of the control unit to display the video IF signal A digital conversion unit and sampling processing unit for digitally converting and sampling a predetermined number of bits, a data memory in which the sampled image IF data are sequentially stored and read out in units of frames, and a horizontal synchronization signal is separated from the image IF signal and separated therefrom. A horizontal synchronous signal separator for counting a horizontal synchronous signal and providing a control signal for switching the scanning direction of the image IF data; A horizontal field counter, a vertical synchronous signal sampling unit and a vertical synchronous signal counter for separating and sampling a vertical synchronous signal from the image IF signal and counting the sampled vertical synchronous signal to determine a scanning direction switching cycle for the image IF data; An image matrix processing unit configured to read and matrix image IF data stored in the data memory based on the horizontal synchronous signal count result and the vertical synchronous signal count result in a state in which the scanning direction is switched; Scanning direction switching display control of a video signal comprising a PIP processing unit for compressing the image IF data in the form of a PIP screen, and an analog conversion unit for converting the scanning direction and converting the PIP-processed image IF data to the image processing unit. An apparatus is provided.

According to the present invention, the image direction of the PIP processed by changing the scanning direction is variably set in position and / or size by the remote controller on the CRT apparatus.

According to the present invention having the above-described configuration, when the screen switching mode is specified for the color image displayed on the CRT device, the scanning direction of the color image is switched horizontally and processed as a PIP screen to the color image of the CRT device. It will be displayed nested.

1 is a block diagram showing a video signal processing system of a general television;

2 is a block diagram showing a scanning direction switching display control apparatus for a video signal according to the present invention;

3 is a view for explaining the operation of the scanning direction switching display control apparatus of a video signal according to the present invention,

3 (a) is a view showing a video screen display state on a general CRT apparatus;

FIG. 3 (b) shows an image data table of the image data memory shown in FIG. 2;

3 (c) is a view for explaining the operation of the image matrix processing unit shown in FIG. 2;

Fig. 3 (d) is a view showing a video screen in which the scanning direction is switched in the form of a sub-screen on the CRT apparatus by the scanning direction switching display control apparatus of the video signal according to the present invention.

* Description of the symbols for the main parts of the drawings *

10: remote control, 12: control unit,

16: image IF module, 18: image processing unit,

20: CRT device, 30: digital conversion unit,

32: sampling processing unit, 36: horizontal field counter,

40: vertical synchronous signal counter, 42: data memory,

44: image matrix processing unit, 46: PIP processing unit,

48: analog converter.

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

FIG. 2 is a block diagram showing a scanning direction switching display control apparatus of a video signal according to a preferred embodiment of the present invention. Reference numeral 12 denotes a remote controller (in FIG. 10), when the screen switching mode is set, the control unit controls to display the color image displayed on the CRT apparatus 20 in the form of a PIP as a whole and overlaps the color image.

In FIG. 2, reference numeral 30 denotes an image IF signal that is activated by a control signal SC applied from the control unit 12 when the screen switching mode is designated and is provided by the image IF module 16. The digital conversion part which consists of an analog-digital converter to convert is shown. 32 denotes a sampling processing unit for sampling the horizontal scanning lines of the image IF data digitally converted by the digital conversion unit 30 by a predetermined number of bits. 34 denotes a horizontal synchronous signal separator for separating the horizontal synchronous signal from the image IF signal, and 36 denotes a horizontal scan line by counting the horizontal synchronous signal provided from the horizontal synchronous signal separator 34 to determine the horizontal scanning line. A horizontal field counter serving as a control signal for scanning direction switching of a video signal is shown.

Reference numeral 38 denotes a vertical synchronization signal sampling unit for sampling a vertical synchronization signal from the image IF signal, and 40 denotes a vertical synchronization signal that counts the sampled vertical synchronization signal and provides it as a control signal for scanning direction switching of the image signal. Indicates the signal counter.

In FIG. 2, reference numeral 42 denotes a data memory in which image IF data sampled by the sampling processor 32 is stored and read out in units of frames, and 44 denotes horizontal scan line counts from the horizontal field counter 36. A matrix for scanning direction switching of image IF data in units of frames applied from the data memory 42 by receiving a control signal based on a signal and a control signal based on a vertical synchronous signal count result from the vertical synchronous signal counter 40. (matrix) shows an image matrix processing section, 46 denotes a PIP processing section for compressing the image IF data whose scanning direction is switched by the matrix processing to form a PIP screen, and 48 is provided by the PIP processing section 46. The analog-to-analog converter converts the video signal of the PIP screen scanned in the scanning direction and applies it to the image processor 18. It represents parts of the log conversion.

Next, the operation of the scanning direction switching display control apparatus for the video signal having the above-described configuration will be described in detail with reference to the waveform diagram shown in FIG.

First, according to the process described with reference to FIG. 1, the normal operation of the corresponding television is performed, and a predetermined color image is displayed on a frame unit on the CRT apparatus 20 (see FIG. 3 (a)). In this state, when the screen switching mode is designated from the remote controller 10, the control unit 12 activates by applying a control signal SC to the digital conversion unit 30, and accordingly the digital conversion unit 30 Digitally converts the image IF signal provided from the image IF module 16 and applies it to the sampling processor 32. The sampling processor 32 samples the digitally converted image IF data by a predetermined number of bits and applies the data to the data memory 42 in units of frames (see FIG. 3B).

In addition, the image IF signal is applied to the horizontal synchronous signal separator 34 to separate the horizontal synchronous signals, and the horizontal synchronous signal separated from the horizontal synchronous signal separator 34 is applied to the horizontal field counter. 36, the horizontal field (i.e., horizontal scan line) is counted, and the count result of the horizontal field counter 36 is applied to the image matrix processing unit 44 as a control signal for scanning direction switching. In addition, the vertical synchronous signal sampling unit 38 separates the vertical synchronous signal from the image IF signal and samples the sample. The sampling result of the vertical synchronous signal is counted by the vertical synchronous signal counter 40 and the image matrix processing unit Is applied as a control signal for scanning direction switching.

Accordingly, the image matrix processing unit 44 reads the pixel data of the image IF data in the form illustrated in FIG. 3 (c) for each of the plurality of horizontal scan lines recognized by the control signal applied from the horizontal field counter 36. Then, matrix processing is performed in response to the control signal (ie, one vertical scanning period) from the horizontal synchronous signal counter 40, and by such matrix processing, the scanning direction of the video IF signal is changed in the horizontal direction.

Subsequently, the image IF data processed by the image matrix processing unit 44 and the scanning direction is changed is applied to the PIP processing unit 46 to form a PIP screen by a well-known compression process, and the scanning direction-switched PIP screen is analog converted. The unit 48 is converted into an analog signal and applied to the image processor 18.

Therefore, the image processor 18 synthesizes the image IF signal applied from the image IF module 16 and the scanning direction change PIP screen applied through the analog converter 48 to the CRT apparatus 20. As a result, in the screen switching mode, the scanning direction switched PIP screen is superimposed on the original color video signal in the form shown in FIG. 3 (d) in the screen switching mode.

On the other hand, the present invention is not limited to the above-described examples, for example, the viewer desires the display position of the scanning direction switched PIP screen displayed on the CRT apparatus 20 by positioning by the remote controller 10. The size of the PIP screen is variably set by the remote controller 10 so that the size of the PIP screen is controlled by the controller 12 for the size set by the remote controller 10. It is, of course, possible to realize this by adjusting the compression ratio in Fig. 46).

As described above, according to the scanning direction switching display control apparatus of the video signal according to the present invention, the color image displayed on the CRT apparatus under the designation of the screen switching mode is subjected to the scanning direction switching processing and the PIP processing to the color image of the CRT apparatus. By allowing the display to be superimposed, the viewer can view the color image in a variety of viewing directions while eliminating the disadvantages incurred in the scanning direction of the entire video signal.

Claims (3)

The image processing unit 18 processing the image IF signal applied from the image IF module 16 as the R / G / B color component and the R / G / B color component processed by the image processing unit 18 are reproduced as color images. In a television equipped with a CRT apparatus 20 to A control unit 12 for controlling the scanning direction change for the video IF signal under the designation of the screen switching mode; A digital converter 30 and a sampling processor 32 which are activated under the control of the controller 12 and digitally convert the video IF signal to sample a predetermined number of bits; A data memory 42 in which the sampled image IF data is sequentially stored and read out in units of frames; A horizontal synchronous signal separator 34 and a horizontal field counter 36 for separating a horizontal synchronous signal from the image IF signal and counting the separated horizontal synchronous signal to provide a control signal for switching the scanning direction of the image IF data. ), A vertical synchronous signal sampling unit 38 and a vertical synchronous signal counter 40 for separating and sampling the vertical synchronous signal from the image IF signal and counting the sampled vertical synchronous signal to determine a scanning direction switching period for the image IF data. ), An image matrix processing unit 44 which reads out image IF data stored in the data memory 42 based on the horizontal synchronizing signal count result and the vertical synchronizing signal count result and performs matrix processing by reading the image IF data with the scanning direction switched; A PIP processor 46 for compressing the image IF data matrix-processed in the scanning direction switching form into a PIP screen form; And an analog converter (48) for converting the image IF data of which the scanning direction is changed and PIP-processed into an analog converter and applying the same to the image processor (18). 2. The apparatus of claim 1, wherein the video screen in which the scanning direction is changed and the PIP process is changed in position on the CRT apparatus (20). The apparatus of claim 1, wherein the image screen size of which the scanning direction is changed and PIP-processed is variable on the CRT apparatus (20).

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