KR19980077281A - Text screen conversion device for vertical screen adjustment of wide television - Google Patents

Abstract

According to the present invention, when a vertical screen is adjusted for converting a playback position of a video screen in a wide television, the display position of a text subtitle by teletext information data received from a television broadcast signal is not affected by the adjustment state of the vertical screen. The present invention provides a text image conversion processing apparatus for vertical screen adjustment of a wide television that enables a constant screen display on a predetermined screen region.

Accordingly, the present invention selects the video signal of the television broadcast which has been tuned by the tuning means 4, 6, and has undergone the detection / amplification of the video detection / amplification section 8, 10 and the video signal processing of the video signal processing section 12. Horizontal / vertical deflection driving state of the horizontal / vertical deflection driving unit 24 and horizontal / vertical deflection driving unit 24 for performing horizontal / vertical deflection driving for reproducing a 16: 9 wide screen on the CRT (16) screen. In a wide television having a horizontal / vertical position adjusting unit 26 for controlling a horizontal / vertical screen size for a 4: 3 screen image signal by controlling the control unit, a telescopic superimposed on a vertical retrace period in the video signal of the television broadcast. Teletext receiving processing means (22,28) for extracting text information data, Teletext processing means (30) for processing the extracted teletext information data in the form of a text subtitle so as to display the data, and the horizontal / vertical To the position adjustment unit 26 In response to the adjustment of the vertical screen size, the text position variable stage 32 for changing the display position so that the text subtitle from the teletext processing means 30 can display the screen in a constant screen area, and the horizontal / vertical position adjusting unit ( A blanking position for generating a blanking signal with respect to the variable screen display position of the text subtitle in response to the adjustment of the vertical screen size by 26) is a 4: 3 screen displayed on the variable stage 36 and the CRT 16 screen. A function setting means 38 for performing a key operation for adjusting a vertical screen size for an image screen having a size, and the text subtitles in a constant screen area irrespective of the adjustment state of the vertical screen size by the function setting means 38. Vertical screen size for the video screen reproduced in the CRT 16 by the memory means 40 and the function setting means 38, which store the control program data for controlling the screen display. Control means for controlling variable text subtitle position of the text position variable stage 32 and variable blanking signal generation of the variable position variable stage 36 on the basis of control program data of the memory means 40 during the adjustment operation It is characterized by comprising 42.

Description

Text screen conversion device for vertical screen adjustment of wide television

The present invention relates to a text screen conversion processing apparatus for adjusting a vertical screen of a wide television, and more particularly, to a vertical screen suitable for a video screen having a 4: 3 aspect ratio in a wide television for reproducing a broadcast screen with a 16: 9 aspect ratio. When the screen adjustment is made, the text screen conversion processing apparatus for vertical screen adjustment of a wide television for converting the display position so that the position of the text subtitle reproduced by the teletext information data can be displayed on a certain screen area.

Conventionally, televisions generally used have a 4: 3 aspect ratio, and receive and reproduce 4: 3 aspect standard television broadcast signals transmitted from a plurality of television stations. In this case, due to the narrowness of the screen dimensions, it was not possible to expect a sense of realism or realism in the viewing.

In consideration of such a conventional situation, recently, a television broadcast signal of a broadcast channel having a 4: 3 screen standard is extended to a 16: 9 screen dimension so that it can be reproduced through a wide CRT having a 16: 9 dimension, or a television broadcast station. A wide television having a 16: 9 screen dimension for receiving and reproducing a television broadcast signal of a 16: 9 screen standard transmitted from the side has been developed and put into practical use.

On the other hand, in such a wide television, the vertical screen size is increased by the user's operation during the reproduction process by the horizontal processing of the television broadcast signal of the 4: 3 screen standard and the reproduction process of the 16: 9 screen standard. In short, it is possible not only to enable a natural display state for the image displayed on the screen, but also to adjust the playback state to a more appropriate screen position.

In addition, such wide televisions receive and display transmission data transmitted in digital form, i.e., teletext information data, overlaid in a vertical retrace period corresponding to approximately 21 horizontal scanning periods 21H of the selected television broadcast signal. The teletext information data provides various service information such as news, business, weather forecast, stocks, entertainment, shopping information, and the like.

Such a data transmission method of teletext information data includes a pattern method for decomposing and transmitting image information composed of characters or figures into pixel units, a code method for converting characters and figures into code forms, and transmitting the code information. The hybrid method is adopted to combine the large amount of information and the high speed transmission rate of the code method. On the other hand, the television side enables full-screen display of text characters based on the received teletext information data on a page-by-page basis, or by dividing each page data of the teletext information by lines, and setting a predetermined screen of the video screen. Even if partial display is possible as a character string according to the text subtitle in the area It is rocking.

However, in such a wide television, a video signal of a television broadcast having a 4: 3 screen standard is reproduced, and text characters of teletext information received from the television broadcast signal are displayed on the lower area of the video screen in the form of line-by-title subtitles. In the display state, when the vertical screen size is adjusted for the 4: 3 screen standard video screen, the text subtitle of the teletext information is excluded from the screen area according to the vertical adjustment state. have.

Accordingly, the present invention has been made in view of the above circumstances, and in the case of adjusting a vertical screen for converting a playback position of a video screen in wide television, display of a text subtitle by teletext information data received from a television broadcast signal is performed. It is an object of the present invention to provide a text image converting processing apparatus for vertical screen adjustment of a wide television, in which the position can be constantly displayed on a predetermined screen area without being affected by the adjustment state of the vertical screen.

In order to achieve the above object, according to the text screen conversion processing apparatus for adjusting the vertical screen of a wide television according to the present invention, it is tuned by the tuning means to detect / amplify the image detection / amplification unit and the image signal processing of the image signal processing unit. A horizontal / vertical deflection drive unit for performing horizontal / vertical deflection drive for reproducing coarse television video signals on a CRT screen with a 16: 9 wide screen, and a horizontal / vertical deflection drive state for the horizontal / vertical deflection drive unit. In a wide television having a horizontal / vertical position adjusting unit for adjusting a horizontal / vertical screen size for a 4: 3 screen image signal, the teletext information data superimposed in the vertical retrace period is extracted from the video signal of the television broadcast. Teletext receiving processing means and the extracted teletext information data in a form of a text subtitle so that the data can be displayed on the screen. The text position variable step of varying the display position so that the text subtitle from the teletext processing means can display the screen in a constant screen area in response to the adjustment of the vertical screen size by the teletext processing means and the horizontal / vertical position adjusting unit. And a blanking position for generating a blanking signal for the variable screen display position of the text subtitle in response to the adjustment of the vertical screen size by the horizontal / vertical position adjusting unit, wherein the 4: 3 screen size is displayed on the CRT screen. A function setting means for performing a key operation for adjusting a vertical screen size for a video screen of the video screen, and a control program for controlling the text subtitle to be displayed on a certain screen area regardless of the adjustment state of the vertical screen size by the function setting means. Memory means for storing data and reproducing the CRT by the function setting means. And controlling means for controlling variable blanking position of the text position variable stage and variable blanking signal generation of the variable stage on the basis of the control program data of the memory means during the adjustment operation of the vertical screen size for the image screen. It provides a text screen conversion processing device for the vertical screen adjustment of the configured wide television.

According to the present invention configured as described above, when a vertical screen size is adjusted in a state in which a video signal having a 4: 3 screen size is reproduced in a wide television that reproduces an image with a 16: 9 screen size, a text subtitle is displayed. In the screen display state, the display area of the text subtitle can always be displayed in a constant screen area regardless of the adjustment of the vertical screen size.

1 is a block diagram showing a text screen conversion processing apparatus for adjusting a vertical screen of a wide television according to the present invention;

2 is a block diagram showing a detailed configuration of the teletext processing unit and the text position variable unit shown in FIG. 1 according to a preferred embodiment of the present invention;

3 is a block diagram showing a detailed configuration of the blanking position variable unit shown in FIG. 1 according to a preferred embodiment of the present invention;

4 is a schematic diagram illustrating a state in which a display position of a text screen is changed during adjustment of a vertical screen as a result of an operation according to an exemplary embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

2: receiving antenna, 4: tuner,

6: Image IF unit, 8: Image detector unit,

10: video amplification unit, 12: video signal processing unit,

14: video output unit, 16: CRT,

18: voice detector, 20: voice signal processor,

22: synchronous separator, 24: horizontal / vertical deflection drive,

26: horizontal / vertical positioning unit, 28: data slicer,

30: teletext decoder, 32: text position variable part,

34: signal conversion section, 36: blanking position variable section,

38: function setting section, 40: memory,

42: control unit. 57: variable position memory,

58: position variable control unit, 60: horizontal position start determination unit,

62: horizontal address counter, 64: vertical position start decision,

66: vertical address counter, 68: clock generator,

70: horizontal blanking generating portion, 72: vertical blanking generating portion,

74: Oagate.

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

1 is a block diagram showing a text screen conversion processing apparatus for adjusting a vertical screen of a wide television according to the present invention. In the apparatus of the present invention, reference numeral 4 is used to tune a predetermined channel from the controller 42 to be described later. A tuner for receiving the channel tuning data for the channel and tuning the corresponding channel in a plurality of channels induced in the reception antenna 2, mixing the local oscillation frequency signal generated from the channel tuning data, and outputting it as an intermediate frequency signal. 6 denotes an image IF unit for intermediate frequency amplifying the tuned image intermediate frequency signal.

Also, reference numeral 8 denotes an image detector for detecting and separating an image signal from an intermediate frequency signal amplified by the image IF unit 6, and 10 denotes an signal amplification level up to an amplification level capable of signal processing. An image amplification unit is shown.

Further, reference numeral 12 separates the luminance signal and the color difference signal from the signal-amplified video signal, synthesizes the composite signal as a composite video signal through luminance adjustment operation and color demodulation process, and outputs text according to teletext information data, which will be described later. A video signal processing unit for synthesizing a caption signal to a predetermined screen area by a composite video signal blanked by a blanking signal, and outputting the RGB signal according to the composite video signal processed by the CRT 16 is performed. An image output unit for amplifying the image scanning output to be possible.

Reference numeral 18 denotes an audio detector which separates and detects an audio signal from an intermediate frequency signal amplified by the image IF unit 6, and 20 denotes an audio signal amplified by the detected audio signal and subjected to stereo signal processing. An audio signal processing unit that performs audio signal processing such as audio multiplex processing.

In addition, reference numeral 22 denotes a synchronization separator for extracting a vertical / horizontal synchronization signal by separating the composite synchronization signal from the image signal, and 24 indicates a horizontal / vertical output driving signal through the separated horizontal / vertical synchronization signal. A horizontal / vertical deflection driving unit which performs a driving operation for vertical / horizontal deflection of an image scan line scanned on the CRT 16 having a 16: 9 screen dimension to reproduce a wide screen of 16: 9. The horizontal / vertical position for adjusting the horizontal / vertical screen size by adjusting the deflection driving state of the horizontal / vertical driving unit 24 during the screen reproduction of the video signal having the 4: 3 screen size under the control of (42). The adjustment part is shown.

Further, reference numeral 28 denotes a data slicer which performs data slice operation to extract teletext information data superimposed within the vertical retrace period by the composite synchronization signal separated from the synchronization separator 22, and 30 denotes the extracted telegraph. A teletext processing section which decodes text information data and outputs it as text subtitle data having a predetermined character font.

Here, the teletext processing unit 30 determines the data type, such as whether it is program data, page data, or index data with respect to the teletext information data extracted from the data slicer 26, as shown in FIG. Controlled by a data type determination unit 44, a teletext memory 46 made of, for example, a DRAM for receiving and storing the teletext information data after the type of the data is determined, and the controller 42 described later. A program memory 48 for storing a control program for controlling a screen display operation by decoding received teletext information data, a font memory 50 for storing various font font data for displaying the teletext information data, and will be described later. The operation is enabled by the control unit 42 and the control program of the program memory 48 The teletext decoder 52 which controls and decodes the teletext information data through the teletext memory 46 to generate and output text subtitle data through the character font data read from the font memory 50, the teletext. A data display processor 54 for display signal processing of the text subtitle data according to the teletext information from the decoder 52, and a display memory 56 for storing the text subtitle data for display signal processing; It is configured by.

Reference numeral 32 denotes screen display of the text subtitle data by the teletext information data from the teletext processing unit 30 in a constant screen area regardless of the adjustment state of the vertical screen size under the control of the controller 42 described later. A text position variable portion for performing a position variable operation for performing a position change operation, and 34 denotes an analog signal processing of the text subtitle data through the text position variable portion 32 and outputs it to the image signal processor 12 in the form of an R / G / B signal. The signal conversion unit is shown.

Here, the text position variable unit 32 is adapted to synchronize the display of text subtitle data through the data display processing unit 54 of the teletext processing unit 30 in a certain screen area as shown in FIG. 2. The position variable memory 57 which is recorded, stored, and read out, and is controlled by the control signal of the controller 42 in a state in which the composite synchronization signal CSYNC from the sync separator 22 is applied. A position variable control unit for generating the recording / reading clocks CK1 and CK2 and the recording / reading enable signal WE and RE so that the 57 can record / read the text subtitle data synchronously in the variable screen area ( 58).

In addition, reference numeral 36 denotes the text position variable unit for blanking processing on the screen region in which the text subtitle data by the teletext information data is displayed on the screen when the vertical screen size is adjusted by the control of the controller 42 to be described later. A blanking position variable part for generating a blanking signal synchronously with the position variable operation of FIG.

Here, as shown in FIG. 3, the blanking position variable part 36 receives a horizontal control signal from the controller 42 to determine the start / end of a predetermined horizontal screen area when the vertical screen size is adjusted. The enable signal ENA from the horizontal position start determining unit 60 while the enable position signal ENA and the clear signal CLR are generated, and the horizontal synchronizing signal HSYNC is applied. Is applied to count the horizontal address and the horizontal subcounter 62 and the vertical control signal from the controller 42 to clear the counting operation by the clear signal CLR. The enable position signal ENA for determining the start / end of the vertical screen area and the vertical position start decision unit 64 for generating the clear signal CLR and the vertical synchronization signal VSYNC are applied to display the screen area. The vertical address counter 66 which receives the enable signal ENA from the vertical position start decision unit 64 in the received state, counts the vertical address, and clears the counting operation by the clear signal CLR. Clock blanking unit 68 for generating a clock for counting operation of the horizontal / vertical address counters 62 and 66, and horizontal blanking for generating a horizontal blanking signal based on the counting value of the horizontal address from the horizontal address counter 62. A vertical blanking generator 72 for generating a vertical blanking signal based on the counting value of the vertical address from the vertical address counter 66 and the horizontal / vertical blanking signal by a logical sum processing operation, respectively. It comprises a oragate 74 which adds and outputs.

Further, reference numeral 38 denotes a matrix button portion provided in a remote control unit for remote control or a predetermined portion of the control panel of the main body. A function setting section for performing a key operation for adjusting the size is shown.

Reference numeral 40 denotes a memory in which control program data for controlling text subtitle data by the teletext information data is displayed on a certain screen area even when the vertical screen size is adjusted by the function setting unit 38. And 42 denotes an operation of adjusting the vertical screen size by the horizontal / vertical position adjusting unit 26 when adjusting the vertical screen size for the video screen reproduced on the CRT 16 screen by the function setting unit 38. In addition, the text position variable part 32 is controlled based on the control program data of the memory 40 while the teletext information data is received and displayed on the screen through the teletext processing unit 30. The blanking signal generated from the blanking position variable part 36 is subjected to variable processing of the display position of the text subtitle data. It represents a control unit for controlling so that the generated corresponding to the display position of the emitter.

Next, the operation of the present invention made as described above will be described in detail with reference to the accompanying drawings.

First, when a predetermined channel transmitted with a 4: 3 screen size is tuned through the tuner 4 and amplified by an intermediate frequency through the image IF unit 6, the image detector 8 transmits the intermediate frequency amplified television broadcast signal. The video signal is detected and separated, and the image amplification unit 10 amplifies the separated video signal, while the image signal processing unit 12 performs an image signal processing on the signal amplified video signal and outputs the image output unit. An image is reproduced on the screen of the CRT 16 having a screen size of 16: 9 via (14).

In this state, the synchronizing separator 22 separates the composite synchronizing signal to extract the horizontal / vertical synchronizing signal, and the horizontal / vertical deflection driving unit 24 is the horizontal / vertical deflection by the extracted horizontal / vertical synchronizing signal. A drive signal is generated to drive a deflection operation of a deflection yoke having a horizontal / vertical deflection coil of the CRT 16 to reproduce a wide screen.

At this time, the data slicer 28 extracts the teletext information data superimposed within the vertical retrace period by the separated composite synchronization signal, and the data type determination unit 44 of the teletext processing unit 30 extracts the extracted text. While the data type of the teletext information data is determined, the teletext decoder 52 decodes the teletext information data through the teletext memory 46 on the basis of the control program from the program memory 48, and the font memory ( The text font data of 50 is used to generate and output predetermined text subtitle data, and the data display processing unit 54 performs display signal processing on the text subtitle data from the teletext decoder 52 so as to display the screen. do.

In this state, when the vertical screen size is adjusted for the 4: 3 screen size video screen reproduced on the CRT 16 by the key operation of the function setting unit 38, the controller 42 In response to the adjustment state of the function setting unit 38, the horizontal / vertical position adjusting unit 26 is controlled to adjust the vertical screen size with respect to the image screen on the CRT 16, and the memory 40 The text subtitle data is displayed on a certain screen area regardless of the vertical screen size adjustment state based on the control program data of the bar. The control signal is transmitted to the position variable control unit 58 of the text position variable unit 32. The position variable memory 57 receives the write / read clocks CK1 and CK2 and the write / read enable signals WE and RE from the position variable control unit 58, and receives them from the data display processing unit 54. Constant screen with text subtitle data in advance To display the station recorded synchronously to performs the operation of storing the poison was taking output.

In addition, the horizontal / vertical position start determining units 60 and 64 of the blanking position variable part 36 receive horizontal / vertical control signals from the control unit 42, respectively, to set the start / end positions of the predetermined screen area. The enable signal ENA and the clear signal CLR are generated by the determination, and the enable signal in the state where the horizontal / vertical address counters 62 and 66 receive the horizontal / vertical sync signal HSYNC and VSYNC, respectively. (ENA) is applied to count the horizontal and vertical addresses, and the counting operation is cleared by the clear signal CLR.

Accordingly, the horizontal / vertical blanking generation unit 70, 72 generates a horizontal / vertical blanking signal based on the horizontal / vertical address counting values from the respective horizontal / vertical address counters 62 and 66, and the oragate At 74, the horizontal and vertical blanking signals are added and output by a logic sum processing operation.

Accordingly, the image signal processing unit 12 receives the variable blanking signal from the blanking position variable unit 36 and performs a blanking process for the screen area where the text subtitle data is to be displayed on the signal converting unit 34. As the text subtitle signal converted by the analog is combined with the composite video signal of the television broadcast and outputted, as shown in FIG. 4, the text subtitle 76 is reduced regardless of the vertical screen size adjustment state of the CRT 16 screen. Screen display is always possible in a certain screen area of the video screen.

According to the present invention made as described above, when the text subtitle is displayed on the screen in the state that the vertical screen size is adjusted during screen playback of a video signal having a 4: 3 screen size in a wide television having a 16: 9 screen size As the display position of the text subtitle is changed so that the display of the text subtitle is always performed in a certain screen area, the text subtitle displayed on the screen is excluded from the screen even if the vertical screen size is adjusted by the viewer. This removal has the advantage that a stable text display function can be implemented.

Claims (3)

The video signal of the television broadcast which has been tuned by the tuning means (4, 6) and has been detected / amplified by the video detection / amplification section (8, 10) and video signal processing by the video signal processing section (12) is displayed on the CRT (16) screen. A horizontal / vertical deflection driving unit 24 which performs horizontal / vertical deflection driving for reproducing a 16: 9 wide screen on the screen, and horizontal / vertical deflection driving states of the horizontal / vertical deflection driving unit 24 by controlling 4: In a wide television having a horizontal / vertical position adjusting unit 26 for adjusting a horizontal / vertical screen size for a video signal having a three-screen size, Teletext receiving processing means (22,28) for extracting teletext information data superimposed in a vertical retrace period from the video signal of the television broadcast; Teletext processing means (30) for processing the extracted teletext information data in the form of a text subtitle data displayable, In response to the adjustment of the vertical screen size by the horizontal / vertical position adjusting unit 26, the text position variable stage for varying the display position so that the text subtitle from the teletext processing means 30 can display the screen in a certain screen area ( 32), A blanking position variable stage 36 for generating a blanking signal for a variable screen display position of the text subtitle in response to the adjustment of the vertical screen size by the horizontal / vertical position adjusting unit 26; Function setting means (38) for performing a key operation for adjusting the vertical screen size for the 4: 3 screen size video screen displayed on the CRT (16) screen; Memory means (40) storing control program data for controlling the text subtitle to be displayed on a certain screen area regardless of the adjustment state of the vertical screen size by the function setting means (38); On the basis of the control program data of the memory means 40 in the adjustment operation of the vertical screen size for the video screen reproduced on the CRT 16 by the function setting means 38, And a control means (42) for controlling the variable text subtitle position and the blanking position for variable blanking signal generation at the variable stage (36). The variable position memory (57) according to claim 1, wherein said text position variable stage (32) comprises: a variable position memory (57) for recording / reading to display text subtitle data from said teletext processing means (30) in a variable screen area; The clock pulses CK1 and CK2 and the write / read enable signals WE and RE are controlled by the control means 42 for variable recording / reading of the text subtitle data of the position variable memory 57. Text display conversion processing device for vertical screen adjustment of a wide television, characterized in that it comprises a variable position control unit 58 provided. 2. The horizontal position start determining means according to claim 1, wherein the blanking position variable stage (36) determines the start / end of the horizontal position which is varied in accordance with the adjustment of the vertical screen size by the control signal from the control means (42). 60, a horizontal address counter 62 which counts a horizontal address by receiving a horizontal synchronous signal HSYNC based on the determination value of the horizontal position start, and a vertical screen by a control signal from the control means 42; Vertical position start determining means 64 for determining the start / end of the vertical position varied in accordance with the adjustment of the size, and vertical counting the vertical address by receiving the vertical synchronization signal VSYNC based on the determination value of the vertical position start. On the basis of the horizontal address counting value from the address counter 66, the clock generator 68 for generating a clock for counting the horizontal / vertical address counters 62, 66, and the horizontal address counter 62, respectively. Horizontal blanking generation unit 70 for generating a horizontal blanking signal, a vertical blanking generation unit 72 for generating a vertical blanking signal based on the vertical addressing value from the vertical addressing device 66, and the horizontal / vertical blanking. And a signal adding unit (74) for adding and outputting signals to each other.