KR19990019209A - Teletext information display control device of multi-screen television - Google Patents

Abstract

The present invention relates to a teletext information display control apparatus of a television. To this end, the present invention relates to a plurality of tuning means (2, 4, 6, 8) capable of simultaneous tuning of a plurality of broadcasting channels, and a multi-screen mode. First image processing means (12) for switching the multi-screen mode switching unit 10 for switching, the first video signal of one broadcast channel through the multi-screen mode switching unit 10 to be reproduced on the first screen image signal (12) 14) second image processing means 16 and 18 for reproducing the second video signal of the other broadcasting channel on the second screen so as to reproduce the second video signal on the second screen, and to the first and second video signals respectively processed. In a multi-screen television having multi-screen positioning / output means (20, 22) for determining and driving a playback screen position for outputting, for setting the multi-screen display mode of the teletext information on the display function of the teletext information. Function setting number to perform key operation (28), teletext extracting means (24,32) for extracting a teletext information signal from a video signal of a predetermined broadcast channel, and said teletext extracting means (24) by executing a multi-screen display mode of said teletext information. Teletext decoding processing means (34,36,38) for performing data processing to decode and output the teletext information from (32) in units of a plurality of information pages, and the teletext decoding processing means (34,36,38). Font memory means (40) for providing font character data for teletext information having a plurality of information page units to be decoded by the plurality of information page units by the teletext decoding processing means (34, 36, 38). Teletext signal processing means (42,44) for performing signal conversion processing of font character data provided from said font memory means (40) into a display signal form that can be displayed on the screen under decoding processing; The first image processing means (12, 14) and the second image processing means (16, 18) for the respective information pages are teletext information signals from a plurality of information page units from the text signal processing means (42, 44). The synchronous clock pulses for the decoding process in units of a plurality of information pages for the teletext switch means 46 and the teletext decoding processing means 34, 36, 38 which form a synchronous switching path for each of In addition to the pulse generating means 48 for generating a switching control pulse for controlling the synchronous switching switching of the teletext switch means 46,

When the multi-screen display mode of the teletext information is set by the function setting means 28, the decoding processing operation of the teletext decoding processing means 34, 36, 38 in units of a plurality of information pages is controlled. And control means 30 for enabling control of the pulse generating operation of the pulse generating means 48.

Description

Teletext information display control device of multi-screen television

The present invention relates to a teletext information display control apparatus for a multi-screen television. More particularly, the present invention relates to teletext information received from a television broadcast signal in a multi-screen television capable of simultaneously reproducing a plurality of broadcast channels. A teletext information display control apparatus for a multi-screen television for displaying on a screen as a plurality of teletext screens.

As is well known, in a general television, a predetermined broadcast channel is tuned among television broadcast signals corresponding to a plurality of broadcast channels transmitted from a plurality of television broadcast stations, so that video / audio reproduction can be performed through video / audio processing. In the video format of a television broadcast signal which is tuned and reproduced in the case of the NTSC system, for example, two video fields (i.e., odd field and even field) each having 252.5 horizontal scanning lines are composed of one frame (one screen). Each image field is assigned a vertical retrace period of at least 21 horizontal scan lines including a vertical synchronization signal for 3 scan lines (3H) and equalization pulses for 3 horizontal scan lines at the front and rear ends of the vertical synchronization signal. By using this vertical retrace period, it is possible to superimpose additional information.

Accordingly, recently, a teletext broadcasting method has been adopted in which a video signal having a form of a character or a figure is superimposed and transmitted in the form of digital data using four of 10 to 21 lines in a vertical retrace period of a video signal. According to the teletext broadcasting, a pattern method of decomposing and transmitting characters or figures into various pixels for various service information such as news, business, weather forecast, stocks, entertainment, shopping, etc., and character codes of the characters or figures (B) Code method for converting and transmitting figure code, code method for transmitting a large amount of information, and hybrid method using pattern method with relatively high transmission speed are applied. In the case of hybrid method, 5.727272Mb / It consists of an NRZ signal with S (364 horizontal subcarrier frequency) so that its amplitude is 70% so that the level of '1' is 70% for the white level of 100% of the video signal. Eojinda.

On the other hand, in such a teletext information signal, the data packet consists of one horizontal scanning line (or period) unit. Each data packet is composed of a total of 296 bits having a 24-bit synchronizer and a 272-bit data portion. It is composed of CR (Clock Run-In) and Byte (Framing Code), and the 14-bit PFX (Prefix) of the data section identifies whether it is pattern or hybrid. It is composed of a service identification unit and a packet control value for controlling the transmission of data packets, and the data of 176 bits includes data of characters, graphics, and additional sound encoded as information data, and codes and error correction codes for controlling the data. (CRC) is included.

Accordingly, by using such a teletext information signal, it is possible to provide the viewer with the latest information that changes over time, such as a programming table of television broadcasting programs of each broadcasting channel, or various newly updateable information. In the case of information, it is possible to update a predetermined information program as a whole among a plurality of types of information programs or to partially update a plurality of letters or numbers included in a predetermined information program.

On the other hand, in a television receiving and reproducing such teletext information, an information program having a plurality of information pages received from a television broadcast signal can be displayed on a page basis, and the information pages can be displayed according to an arbitrary operation by the user. The conversion is made so that the sequential character or numeric content can be read for checking or obtaining information.

However, in a television capable of receiving such teletext information, since the information page of the teletext information can be displayed on a single video screen by sequential page switching per page, the entire teletext information content can be displayed. There is an inconvenience in that it takes a long time for learning.

Accordingly, the present invention has been made in view of the above circumstances, and in the multi-screen television capable of simultaneous reproduction of two screens, the text corresponding to each information page in the simultaneous reproduction state of two screens for the teletext information having multiple information pages. SUMMARY OF THE INVENTION An object of the present invention is to provide a teletext information display control apparatus for a television which allows the size of a font to be varied so that simultaneous screen display can be performed in units of a plurality of information pages.

According to the teletext information display control apparatus of a multi-screen television according to the present invention for achieving the above object, a plurality of tuning means capable of simultaneous tuning of a plurality of broadcast channels, and a multi-screen for switching for switching of the multi-screen mode A first video processing means for processing a first video signal of one broadcasting channel through the multi-screen mode switching unit so as to be reproduced on a first screen, and a second video signal of a second video signal of the other broadcasting channel. A second image processing means for reproducing an image signal in a reproducible manner, and a multi-screen positioning / output means for determining and outputting a reproduction screen position for each of the first and second image signals processed by the image signal. A function setting means for performing a key operation for setting the multi-screen display mode of the teletext information on the display function of the teletext information; Teletext extraction means for extracting the teletext information signal from the video signal of the channel and decoding the teletext information from the teletext extraction means into a plurality of information page units by executing a multi-screen display mode of the teletext information. Teletext decoding processing means for performing data processing to be output by processing, font memory means for providing font character data for teletext information having a plurality of information page units decoded by said teletext decoding processing means, and said teletext Teletext signal processing means for signal-converting the font character data provided from said font memory means into a display signal form that can be displayed on screen under decoding processing of a plurality of information page units by decoding processing means, and a plurality from said teletext signal processing means. On the information page of Teletext switch means for forming a synchronous switching path for applying the corresponding teletext information signal to the first image processing means and the second image processing means for each information page, and a plurality of the teletext decoding processing means. Pulse generation means for providing a synchronous clock pulse for decoding processing in units of information pages of the information page, and for generating a switching control pulse for controlling the synchronous switching switching of the teletext switch means, and teletext by the function setting means; Control means for controlling the decoding processing operation in units of a plurality of information pages for the teletext decoding processing means when the multi-screen display mode of information is set, and for enabling control of the pulse generating operation of the pulse generating means. Provided is a teletext information display control device of a multi-screen television comprising a do.

According to the present invention configured as described above, in a multi-screen television capable of simultaneous reproduction of two screens, the simultaneous display in two page units through two screens by executing the multi-screen display mode for the teletext information received from the television broadcast signal. In the case where it is desired to display, the received teletext information is decoded in units of two pages, and the entire page is made up by font characters having a smaller number of pixels than the font characters of the teletext information displayed on a normal single screen. Both screens are displayed at the same time.

1 is a block diagram showing a teletext information display control apparatus of a multi-screen television according to the present invention;

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

3A illustrates an example in which teletext information is displayed on a single screen according to a typical embodiment;

3B illustrates an example in which teletext information is simultaneously displayed on a plurality of screens according to a preferred embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

2, 4: tuner, 6, 8: video IF section,

10: multi-screen mode switch unit, 12, 16: video amplifier,

14: first image processing unit, 18: second image processing unit,

18: multi-screen positioning section, 20: signal output section,

22: signal output section, 24: main synchronous separation section,

26: teletext processing unit, 28: function setting unit,

30: control unit, 32: data slicer,

34: control memory, 36: teletext memory,

38: teletext decoder, 40: font memory,

42: signal conversion processing section, 44: RGB encoder,

46: teletext switch section, 48: pulse generator section.

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 teletext information display control apparatus of a multi-screen television according to the present invention. In the apparatus of the present invention, reference numerals 2 and 4 denote a multi-screen mode or a single unit from the control unit 30 to be described later. Receives channel tuning data for multiple channel or single channel tuning in accordance with the execution of the screen mode, and tunes the RF signal of the corresponding broadcasting channel to process high frequency amplification, and generates a local oscillation frequency signal generated by the channel tuning data. And first and second tuners, which are mixed with and converted into an intermediate frequency signal.

Also, reference numerals 6 and 8 denote first and second image IF units which respectively perform intermediate video amplification processing of the television broadcast signals tuned through the first and second tuners 2 and 4, respectively.

Also, reference numeral 10 denotes a television according to the first and second broadcast channels through the first and second video IF units 6 and 8 under the multi-screen mode under the mode switching control by the controller 30 to be described later. The multi-screen mode switch unit is switched to form a signal path for multi-screen reproduction of the broadcast signal.

Reference numeral 12 denotes a first video amplifier which amplifies the video signal of the first broadcast channel through the multi-screen mode switch unit 10 to an amplification level capable of processing the video signal, and 14 denotes the first signal amplifier. The video signal according to one broadcasting channel is separated into a luminance signal and a chrominance signal, and the luminance adjustment and color demodulation are performed, synthesized as an R / G / B signal, and output. In addition, the teletext described later under the multi-screen display mode of teletext information A first image processing unit for image processing and outputting the teletext information signal of one side information page provided from the processing unit 26 is shown.

Further, reference numeral 16 denotes a second video amplifier which amplifies the video signal of the second broadcast channel through the multi-screen mode switch unit 10 to an amplification level capable of processing the video signal, and 18 denotes the signal amplified unit. The video signal according to two broadcasting channels is separated into a luminance signal and a chrominance signal to perform luminance adjustment and color demodulation, synthesized as an R / G / B signal, and outputs the same. A second image processing unit which performs image processing on the teletext information signal of the other side information page provided from the processing unit 26 and outputs the same.

Reference numeral 20 denotes an R / G / B signal corresponding to the first and second broadcast channels processed by the first and second image processing units 14 and 18 or teletext information according to a plurality of information pages. A multi-screen positioning unit for determining a screen reproduction position for a signal and performing a multiplexing operation, where 22 is amplified and driven by an R / G / B signal or a telerex information signal through the multi-screen positioning unit 20. Signal output unit for forming a single screen or multiple screens on the CRT screen.

Reference numeral 24 denotes a main synchronization separator for separating a synchronization signal from a video signal according to a first broadcast channel from the first image amplifier 12, and 26 denotes a separation from the main synchronization separator 24. The teletext information included in the vertical blanking period of the synchronous signal is extracted and decoded into a single information page or a plurality of information pages according to a screen display function or a multi-screen display mode through a single screen of normal teletext information. A teletext processing unit for processing data to be displayed on a screen or two screens.

Here, the teletext processor 26 extracts the teletext information data superimposed on the vertical blanking period for the synchronization signal from the main sync separator 24 as shown in FIG. 2 through a data slice operation. Tele 32 according to the entire information page from the data slicer 32, the control memory 34 in which the slicer 32, the control program for controlling single screen display of teletext information or the execution control of the multi-screen display mode are stored. And a teletext memory 36 for storing text information data.

In addition, according to FIG. 2, the teletext information data is decoded in units of a single page according to the display function of the single screen for the teletext information under the control of the control unit 30 to be described later, so that the font character data of the normal font character size is used. In addition to performing data processing for displaying the screen, data processing is performed to decode the teletext information in units of two pages according to the execution of the multi-screen display mode so that the screen is displayed as font character data having a smaller character size than a normal font character size. An operating teletext decoder 38, a first font memory 40a in which first font character data having a number of pixels (X × Y) having a character size of a normal font is stored and a pixel of the first font character data. A second font memory 40b in which second font character data of the number of pixels (x × y) are stored so as to have a size of font characters smaller than the number (X × Y). The font memory 40 is comprised.

Also, according to the teletext processor 26 shown in Fig. 2, the teletext decoder 38 decodes the teletext information in units of one page (single screen display function) or in units of two pages. Analog signal conversion for the first font character data from the first font memory 40a of the font memory 40 or the second font character data from the second font memory 40b in accordance with the multi-screen display mode. A signal conversion processing section 42 which performs processing, an RGB encoder 44 which encodes and converts the analog text processed teletext information signal in the form of a color displayable R / G / B signal, and the R / G / B signal. The synchronous signal so that each information page is applied to the first image processing unit 14 and the second image processing unit 18 according to the execution of the multi-screen display mode. Tele forming path Synchronization required for the operation of the teletext decoder 38 by being controlled by the text switch unit 46 and the control unit 30 to be described later and receiving the synchronization signal SYNC from the main synchronization unit 24. In addition to generating a clock pulse, the teletext switch unit 46 includes a pulse generating unit 48 for generating a switching control pulse for synchronously switching the screen scanning cycle of two screens.

Further, reference numeral 28 is a matrix button unit provided in a remote control unit for remote control or a predetermined control panel of the main body, and in addition to a key operation for executing the display function of the teletext information received from a television broadcast signal, A function setting section for performing a key operation for executing a multi-screen display mode for simultaneously displaying each information page on two screens in units of two pages under the display function.

Reference numeral 30 denotes a control unit which controls the overall functional operation of the multi-screen television by the key operation of the function setting unit 28. The control unit 30 is controlled by the function setting unit 28. When the multi-screen display mode is set under the display function of the teletext information, the control signal CS is applied to the teletext processing unit 26 so that the teletext decoder 38 has two pieces of information about the multipage teletext information. The decoding process is performed on a page basis, and the teletext display screen is formed by the second font character data having a small number of pixels (x × y) stored in the second font memory 40b of the font memory 40. In addition, the pulse generation operation of the pulse generator 48 is enabled.

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

First, when the teletext information is received from a television broadcast signal of a predetermined broadcast channel tuned by the first tuner 2 and reproduced on a single screen, the television broadcast signal tuned by the first video amplifier 6 is reproduced. When the video intermediate frequency is amplified and the signal is amplified by the first image amplifier 12, the main synchronization separator 24 separates the synchronization signal from the television broadcast signal, and the data slicer of the teletext processor 26 ( 32 extracts the teletext information data superimposed in the vertical blanking period of the separated synchronization signal, while the extracted teletext information data is stored in the teletext memory 36.

Accordingly, the teletext decoder 38 performs decoding processing in units of one page based on the control program of the control memory 34 to read the font character data stored in the first font memory 40a of the font memory 40. On the other hand, the signal conversion processing section 42 performs the analog conversion processing of the font character data from the first font memory 40a by decoding processing of one page unit from the teletext decoder 38, and the RGB encoder ( The teletext information signal converted to the R / G / B signal through 44 is applied to the first image processing unit 14 via the teletext switch unit 46 to be image processed, and then the signal output unit 22 is processed. As shown in Fig. 3A, a teletext screen of one page unit is formed by having the number of pixels (X x Y) of a normal character size for each character font on the CRT screen as shown in FIG.

On the other hand, when the multi-screen display mode of the teletext information is set by the key operation of the function setting unit 28, the control unit 30 controls the teletext decoder 38 in accordance with the multi-screen display mode. The teletext information data is decoded in units of two pages, and the teletext decoder 38 accesses the second font memory 40b of the font memory 40 according to the decoding result, and the first font memory. Character font data having a pixel number (x × y) having a character size smaller than the pixel number (X × Y) of the character font data of (40a) is outputted, while the analog signal processing of the signal conversion processing section 42 is performed. And the teletext information signal converted into the R / G / B signal by the RGB encoder 44 through the teletext switch unit 46 whose switching operation is controlled by the switching control pulse from the pulse generator 48. The above in units of pages The first image processor 14 and the second image processor 18 are supplied.

Accordingly, the multi-screen positioning unit 20 displays a multi-screen display of the teletext information signal having respective pages from the first image processing unit 14 and the second image processing unit 18 according to the multi-screen display mode. The position is determined, and the teletext information signal in units of two pages output under the amplification driving of the signal output unit 22 is the number of pixels (X × Y) for font characters having a normal character size as shown in FIG. 3B. Character fonts having a smaller number of pixels (x x y) can be displayed on the screen as a whole.

According to the present invention made as described above, in a multi-screen television capable of simultaneous reproduction of two screens, the teletext information received from the television broadcast signal is simultaneously screened in multiple page units on the multi-screen by executing the multi-screen display mode. By making it possible to display, there is an advantage that it is possible to quickly grasp the contents of the teletext information having a plurality of information pages.

Claims (2)

A plurality of tuning means (2, 4, 6, 8) capable of simultaneously tuning a plurality of broadcast channels, a multi-screen mode switching unit 10 for switching for switching of the multi-screen mode, and the multi-screen mode switching unit 10 First video processing means (12,14) for processing the first video signal of one broadcasting channel on the first screen so that the first video signal can be reproduced on the first screen, and the second video signal of the other broadcasting channel on the second screen. Second image processing means 16 and 18 for processing image signals, and multi-screen positioning / output means 20 for determining and outputting a reproduction screen position for the first and second image signals processed by the image signal, respectively. 22) a multi-screen television with A function setting means 28 for performing a key operation for setting the multi-screen display mode of the teletext information on the display function of the teletext information; Teletext extraction means (24,32) for extracting a teletext information signal from a video signal of a predetermined broadcast channel; Teletext decoding processing means for performing data processing to decode and output the teletext information from the teletext extracting means 24, 32 in units of a plurality of information pages by executing a multi-screen display mode of the teletext information. (34,36,38), Font memory means (40) for providing font character data for teletext information having a plurality of information page units decoded by said teletext decoding processing means (34, 36, 38); Teletext for signal conversion processing of font character data provided from the font memory means 40 into a displayable signal form under decoding processing of a plurality of information page units by the teletext decoding processing means 34, 36, 38. Signal processing means (42, 44), The first image processing means (12, 14) and the second image processing means (16) for each information page, the teletext information signal from the teletext signal processing means (42, 44) in accordance with a plurality of information page units. Teletext switch means 46 for forming a synchronous switching path for each of the The synchronous clock pulse is provided to the teletext decoding processing means 34, 36, and 38 for decoding processing in units of a plurality of information pages, and the synchronous switching switching of the teletext switching means 46 is controlled. Pulse generating means 48 for generating a switching control pulse, and When the multi-screen display mode of the teletext information is set by the function setting means 28, the decoding processing operation of the teletext decoding processing means 34, 36, 38 in units of a plurality of information pages is controlled. And control means (30) for enabling control of the pulse generating operation of said pulse generating means (48). 2. The first font memory according to claim 1, wherein said font memory means (40) stores first font character data having a normal number of pixels (XxY) that can be displayed on a screen on a single screen of teletext information. 40a and the number of pixels smaller than the number of pixels (X × Y) for the font character data of the first font memory 40a so that the entire information page can be displayed on the screen in the multi-screen display mode of the teletext information. a second font memory 40b in which second font character data having xxy) is stored; The teletext decoding processing means (34, 36, 38) accesses the second font memory (40b) in the multi-screen display mode of the teletext information so that the second font character data is displayed as font characters according to a plurality of information pages. Teletext information display control device for a multi-screen television, characterized in that the display.