KR19980075330A - Change information data display processing device of teletext information - Google Patents

Abstract

The present invention relates to a display information processing apparatus for changing information data of teletext information. According to an embodiment of the present invention, when the teletext information data of a television broadcast is extracted and the type of data is determined by the data type determining means 44, Teletext memory means (46) for storing the determined teletext information data, program memory means (48) for storing control program data for controlling character size conversion of the updated changed data of the teletext information data, and the teletext memory means (46). Font memory means (50) storing character font data for converting and displaying a character size for an updated changed data portion of text information data, and receiving update recognition data for designating the updated changed data portion by decoding the teletext information data. If received, the character font data from the font memory 50 is provided to the gang The teletext decoder 52 outputs the changed size of the text size for the changed data portion, and the text font data according to the decoded and applied teletext broadcasting can be displayed on the screen, and the updated and changed data portion is displayed. Display data output processing means (54, 56) for performing data processing for displaying the character font corresponding to the converted character size to be interfaced through the display interface means (42), and included in the teletext information data; And control means (32) for detecting the received update recognition data to control conversion of the character size for the updated and changed data portion; According to another embodiment, the program control means 48 stores control program data for overall control of the screen display of the teletext information data, and is controlled by the control program data of the program memory 48 to control the teletext memory 46. A teletext decoder 52 which decodes the teletext information data from < RTI ID = 0.0 >), < / RTI > and outputs the text font data of a normal character size according to the teletext broadcast, and the previously displayed character display data of the teletext broadcast. Display data output processing means for storing the character font data according to the teletext broadcast from the teletext decoder 52 in a screenable manner and storing and uploading the character display data after the data processing is completed; 54,56), providing character font data of conventional character size and more Font memory means for storing character font data for character size conversion of the updated and changed data portion, character font data from the teletext decoder 52 and characters previously stored in the display data output processing means 54, 56; Character code comparison processing means 62 for comparing the character code of the display data, detecting the updated and changed data portion, and reading out and outputting the character font data for character size conversion from the font memory means; the display data output processing means And data synthesizing means 64 for synthesizing and outputting the character display data of the normal character size from (54,56) and the character font data having the variable character size from the character code comparison processing means (62). Characterized in that configured.

Description

Change information data display processing device of teletext information

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display information processing apparatus for changing information data of teletext information. More particularly, the present invention relates to a multipage display in a television having teletext processing means for receiving and displaying a teletext information signal superimposed on a television broadcast signal. A change information data display processing apparatus for teletext information which performs a differential display process on information which has been updated and changed over time in the teletext character information.

In general, a television is tuned to a predetermined channel among television broadcast signals of a plurality of broadcast channels transmitted in the form of over-the-air from a plurality of television stations to perform video intermediate frequency amplification processing, video / audio detection processing, and video / audio signal processing. Through the CRT and the speaker, the video / audio playback can be performed. The video format of the television broadcast signal of the multiple broadcast channels is synchronized by the horizontal synchronization signal every 1H scanning line (1H), for example, in the NTSC method. The radix and even fields with 252.5 horizontal scan lines (H) each consist of one frame (i.e. one screen), and each radix and even fields are synchronized by a vertical synchronization signal. The additional information can be added in the vertical retrace period of the 21 lines 21H including the vertical synchronization signal.

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.

However, since the television side which receives and displays the teletext information signal is displayed to display the teletext information newly received without any distinction from the contents of previously displayed information as time passes, As it becomes impossible for a viewer to accurately distinguish or recognize information contents that are periodically or subcyclically changed, an effective use state of teletext information is halved.

Accordingly, the present invention has been made in view of the above circumstances, and when the change information instruction data indicating the change information updated over time is detected among the teletext information signals received from the television, the change information instruction data indicates that the change information instruction data is indicated. SUMMARY OF THE INVENTION An object of the present invention is to provide a change information data display processing apparatus for teletext information in which the size of the text font is varied with respect to the characters of the change information.

Another object of the present invention is to compare the character code data generated as a result of decoding the teletext information signal received from the television with the previously stored character code data and to change the character according to the update change of the predetermined information. SUMMARY OF THE INVENTION An object of the present invention is to provide a change information data display processing apparatus for teletext information which is made to display a variable font size for a code.

According to the apparatus for displaying change information data of teletext information according to an embodiment of the present invention, an image signal of a television broadcast, which is tuned by a tuner and amplified by an intermediate frequency through an image IF unit, is provided. A television for detecting and amplifying through an amplifying unit and processing a video signal through a video signal processing unit to reproduce an image on a CRT through an image output unit, wherein the teletext information data is subjected to a vertical retrace period by a synchronization signal separated from the video signal. If the data extraction means for extraction and the type of data extracted by the data extraction means are determined by the data type determination means, the teletext memory means for storing the determined teletext information data, and the screen display of the teletext information data In addition to the overall control over the A program memory means for storing control program data for storing the character data, character font data for characterizing teletext information data from the teletext memory means, and a character for converting and displaying the character size of the updated and changed data portion. The font is stored by the font memory means for storing the font data, and the control program data of the program memory to receive the update recognition data that designates the updated and changed data portion by decoding the teletext information data from the teletext memory. Teletext decoder that receives the character font data from the memory and outputs the changed character size for the updated and changed data portion, and displays the character font data according to the decoded and applied teletext broadcasting. Display data output processing means for performing data processing for displaying the character font corresponding to the updated changed data portion with the converted character size, and teletext based on the determination value of the data type through the data type determination means. By controlling the decoding operation of the decoder, it is possible to display the teletext information data, and to detect the update recognition data received and included in the teletext information data, and to convert and display the character size of the updated and changed data part. Control means for controlling to control the display data; and display interface means for converting the character display data of the teletext broadcasting processed through the display data output processing means into an R / G / B signal form and outputting the converted signal to the video signal processor. A change information data display and processing apparatus for configured teletext information is provided.

According to another aspect of the present invention, there is provided an apparatus for displaying change information data of teletext information according to another embodiment of the present invention, which detects a video signal of a television broadcast tuned by a tuner and amplified by an image IF unit. A television for detecting and amplifying through an amplifying / amplifying unit and reproducing an image on a CRT through an image output unit by processing an image signal through an image signal processing unit, wherein the teletext information data in a vertical retrace period is generated by a synchronization signal separated from the image signal Data extraction means for extracting the data, and if the type of data is determined by the data extracting means and is determined by the data type determining means, the teletext memory means for storing the determined teletext information data, and the screen of the teletext information data. Program that stores control program data for overall control over display RAM memory means, which is controlled by the control program data of the program memory to decode the teletext information data from the teletext memory, and outputs the character font data of the normal character size according to the teletext broadcasting so as to display on a screen. Teletext decoder stores previously displayed character display data of teletext broadcasting, and displays text font data according to teletext broadcasting from the teletext decoder so that the data can be displayed on the screen. Display data output processing means for uploading and storing data, font font means for providing character font data of a normal character size, and for storing character font data for character size conversion of an updated changed data portion, from the teletext decoder Character Font Data Character code comparison processing for comparing the character code of the character display data previously stored in the display data output processing means and detecting the updated and changed data portion to read and output character font data for character size conversion from the font memory means. Means for synthesizing and outputting character display data of normal character size from said display data output processing means and character font data having a variable character size from said character code comparison processing means, said received tele Control means for performing screen display of text information data and receiving a result of code comparison from the character code comparison processing means to recognize an update change state of information, and teletext broadcasting from the data synthesizing means. Character display data in the form of R / G / B signals Provided is a change information data display processing apparatus for teletext information comprising a display interface means for converting and outputting the image signal processing unit.

According to the present invention configured as described above, in the case of receiving the teletext information data on the television and displaying the screen, if data storage information that is updated and changed over time is detected, the character size for the corresponding data portion is converted to the screen. By making it displayed, it is easy to recognize the updated change information.

1 is a block diagram showing a state in which the change information data display processing apparatus of teletext information according to the present invention is applied to a television;

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

3 is a schematic diagram showing an information structure for each layer of a teletext information signal transmitted superimposed on a television broadcast signal;

4A and 4B are diagrams illustrating a data bit form of change information indicating data indicating change information on received teletext program information according to a preferred embodiment of the present invention;

5 is a view showing a form in which font data for changing a character size of changed character information is stored in a font memory shown in FIG. 2 according to a preferred embodiment of the present invention;

6 is a block diagram illustrating a detailed configuration of the teletext processing unit shown in FIG. 1 according to another 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: Synchronous Separator, 20: Vertical / Horizontal Deflection Drive,

22: voice detector, 24: voice signal processor,

26: data slicer, 28: teletext processor,

30: function setting section, 32: control section,

34: input port, 36: memory,

38: CPU, 40: output port,

42: display interface, 44: data type determination,

46: teletext memory, 48: program memory,

50, 58, 60: font memory, 52: teletext decoder,

54: display data processing section, 56: display memory,

62: character code comparison processing unit, 64: data synthesis unit.

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 state in which the change information data display processing apparatus of the teletext information according to the present invention is applied to a television. In the apparatus of the present invention, reference numeral 4 denotes a predetermined broadcast from the control unit 32 described later. In addition to receiving channel channeling data for channel channeling and tuning the corresponding channel among a plurality of channels induced in the reception antenna 2, the local oscillation frequency signal generated by the channel channeling data is mixed to form an intermediate frequency signal. An output tuner is shown, and 6 denotes an image IF unit for intermediate frequency amplification of the selected intermediate frequency television broadcast signal.

Further, reference numeral 8 denotes an image detector which detects only an image signal from the intermediate frequency-amplified television broadcast signal, and 10 denotes an image amplifier that amplifies the detected image signal to a signal level at which image signal processing is possible.

Also, reference numeral 12 denotes an R / G / B signal by separating the luminance signal and the color difference signal from the signal-amplified image signal and adjusting the image level such as luminance adjustment, color demodulation, brightness adjustment, contrast adjustment, color amount adjustment, and the like. A video signal processing unit for synthesizing and outputting a composite video signal having a form, and synthesizing and outputting a teletext display signal applied through a display interface 42 from a teletext processing unit 28 to be described later. Reference numeral 14 denotes an image output unit which is driven to amplify the image signal processed composite video signal through the CRT 16 screen so as to be reproduced.

Reference numeral 18 denotes a synchronization separator for separating a composite synchronization signal from the image signal from the image amplifier 10, and 20 denotes a horizontal / vertical signal based on the horizontal / vertical synchronization signal by the separated composite synchronization signal. A vertical / horizontal deflection driver for generating a deflection drive signal and driving for deflection of the horizontal / vertical deflection coils of the CRT 16 is shown.

Further, reference numeral 22 denotes an audio detector for detecting and detecting only an audio signal from an image intermediate frequency signal from the video IF unit 6, and 24 denotes an amplification of the separated detected audio signal and performs stereo signal processing or multiplex audio signals. An audio signal processing unit that performs volume control and sound quality adjustment through processing.

Reference numeral 26 denotes a data slicer which performs a data slice operation for extracting teletext information data included in the vertical retrace period by the composite synchronization signal separated from the synchronization separator 18, and 28 denotes the extracted data. A teletext processing unit which decodes teletext information data for each data type and decodes it for display, and performs differential display processing for converting the character size for the data portion updated and changed over time. .

Here, the teletext processing unit 28 according to an embodiment of the present invention, whether the teletext information data extracted from the data slicer 26 is program data, page data or index data, as shown in FIG. A data type determination unit 44 for determining whether or not to output the determination value and a teletext memory 46 for storing teletext information data for which the data type is determined, for example, a DRAM, and a control unit 32 described later. Program memory storing control program data for controlling character size conversion of change information according to detection of an update change state of a predetermined data portion, as well as overall control of the screen display processing of the received teletext information data, which is controlled by the 48, addressed by the addresses F1 to Fn as shown in FIG. The first pixel font storage area 50A in which character font data having a character size of 8 pixels) is stored and is addressed by addresses 2F1 to 2Fn, which is n times (e.g., 2 times) larger than that of the conventional xxy pixels. A font memory 50 comprising a second pixel font storage area 50B having a large X × Y pixel character size, and the control program of the program memory 48 being operated by the controller 32 described later. Decoding the teletext information data from the teletext memory 46 on the basis of the data, XxY pixels corresponding to the changed data portion are detected upon detection of the update specification information specifying the change information updated and changed over time. Teletext decoder 52, which reads the character font data having the same from the font memory 50, and outputs it on a screen display with normal character font data, from the teletext decoder 52. A display data processing unit 54 for processing the character font data according to the coded teletext information so as to be displayed on the screen and outputting the character font data as character display data; and character display of the teletext information processed by the display data processing unit 54. And a display memory 56 for temporarily storing data.

The teletext information data processed to be displayed on the screen by the teletext processor 28 is sampled at 364 times the frequency (5.727272 Mbit / sec) of one video scanning period 1H as shown in FIG. Next, it consists of Layer 1, which transmits a data line composed of 296 bits in the horizontal scanning period and transmits the data lines. The data line unit is composed of a 16-bit bit sync signal, an 8-bit byte sync signal, and a 272-bit data packet. Then, the 82-bit check code is composed of Layer 2 to correct errors in units of data packets, and the information bits of the data packets are the same program as the SI (Service Identification) for transmitting the broadcast service method or transmission mode. Layer 3 consists of a 14-bit PFX (Prefix) with a PC (Packet Ciontrol) to indicate the continuity of the packets in the packet, and a 176-bit Data Block. In addition, the data block is a set of information data, which is composed of data group data, a data group header, a CRC code for error detection, an SOH indicating start / end, and program management data and pages for defining program data. It consists of layer 5 (layer 6) which consists of a header and page data.

Here, the update designation information recognized by the teletext decoder 52 designates a page content update designation bit which designates an update state of predetermined content of a page as shown in FIG. 4A, and an update state of the broadcast program table itself. Update information designation data having a program table update designation bit, a character update designation bit for specifying a character update, and a numeric update designation bit for designating a number update, and as shown in FIG. 4B. Update character position information having X bits indicating the position of the update character specified in accordance with the character update designation bit of the designated data, and update numeric position information indicating the position of the update number designated in accordance with the number update designation bit of the update information designation data. It includes the update information positioning data made.

Further, reference numeral 30 is composed of a matrix button unit provided in a remote control unit for remote control or a predetermined control panel of a television main body, and sets an execution command for executing the screen display of the received teletext information, and a plurality of pieces of information. A function setting section for keying an operation command for selective display of a page or a plurality of program information is shown.

Further, reference numeral 32 controls to display the teletext information received from the teletext processing unit 28 according to the key setting state from the function setting unit 30, and the teletext decoder 52 By recognizing the update status for letters or numbers by the update information specifying data from the above), the teletext decoder 52 is controlled to perform the character size change processing on the corresponding updated changed data portion based on the update information positioning data. The controller 32 is an input port 34 for receiving a variety of data, a memory 36 for storing input data or result data processed / compared, and an oscillation clock such as a crystal oscillator. Timer 37 that clocks the time through a clock pulse generated by the generating means, the data received from the outside received through the input port 34 It is configured to include a T / operation processor CPU (38) and an output port 40 for outputting the control data according to the comparison / calculation result by the recognition processing by the CPU (38) to.

Reference numeral 42 designates an R / G / B signal by analog converting the character display data from the display data processing unit 54 of the teletext processing unit 28 after its operation is enabled by the control unit 32. As a form, a display interface output to the video signal processor 12 is shown.

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

First, when the tuner 4 tunes an RF signal for a predetermined broadcast channel and outputs it as an intermediate frequency signal, the image signal intermediately amplified through the image IF unit 6 is detected through the image detector 8. The image is reproduced through the CRT 16 through the image signal processing of the image signal processing unit 12 and the amplification processing by the image output unit 14 through the signal amplification by the image amplifier 10, and the CRT 16 ), The horizontal / vertical deflection coil is deflected by the driving of the vertical / horizontal deflection drive unit 20 driven on the basis of the horizontal / vertical synchronization signal separated from the synchronous separation unit 18 so as to enable normal reproduction of the video screen. The voice signal is detected by the voice detector 22, the voice signal is processed by the voice signal processor 24, and the voice is reproduced through the speaker.

In this state, the data slicer 26 performs a data slice operation for extracting the teletext information data superimposed in the vertical retrace period by the composite synchronization signal separated from the synchronization separator 18, and the teletext processing unit ( In 28), a decoding processing operation is performed to display the extracted teletext information data on the CRT screen.

On the other hand, the data type determination unit 44 in the teletext processing unit 28 determines whether the extracted teletext information data is program data, page data or index data, and determines the result of the determination of the control unit 32. The teletext memory 46 stores the teletext information data of which the data type is determined.

At this time, the teletext decoder 52 is controlled by control program data from the program memory 48 to decode the teletext information data, and as shown in FIG. When the update information specifying data having the number update designating bit is detected, the font memory 50 is accessed based on the update character / number position information indicating the position of the update / change character / number as shown in FIG. The character font data of the first pixel font storage area 50A is read out for normal data which has not been changed, and for example, twice as compared to the character font data of the first pixel font storage area 50A for the updated changed data part. The character font data of the second pixel font storage area 50B having n times as shown in FIG.

Accordingly, the display data processing unit 54 processes and outputs the character font data having a variable character size so as to be displayed on the screen with respect to the updated changed data from the teletext decoder 52, and the display interface 42 The CRT (16) screen is subjected to a signal synthesizing operation of the image signal processing unit 12 by analog converting the data display character display data into a form of an R / G / B signal and outputting it to the image signal processing unit 12. The screen is displayed with the size of a character corresponding to the data portion updated and changed over time.

Next, another embodiment of the present invention configured as described above will be described in detail with reference to FIG.

However, the configuration shown in FIG. 1 is the same as in the embodiment of the present invention, and a description thereof is omitted, and in the configuration according to another embodiment of the present invention shown in FIG. The text memory 46 and the program memory 48 are given the same reference numerals as in the embodiment of the present invention shown in FIG. 2 and the detailed description thereof will be omitted.

In the apparatus of the present invention shown in the same figure, reference numeral 52 denotes an operation from the teletext memory 46 under the control of the control program data of the program memory 48 after its operation is enabled by the control unit 32. In order to decode the teletext information data and display the contents of the teletext information, a teletext decoder which reads character font data having a normal character size from the first font memory 58 to be described later and outputs it for screen display is provided. Indicates.

Further, reference numeral 54 denotes a display data processing unit which processes the character font data having the normal character size from the teletext decoder 52 and outputs it as character display data, and 56 denotes the previously received teletext information. In addition to storing the character display data according to the above, the display memory for uploading and storing the new character display data in which the data processing of the display data processing unit 54 is completed is stored.

Reference numeral 58 denotes a first font memory in which character font data having a typical character size of xxy pixels, such as 10x8 pixels, is stored, and 60 is, for example, twice as large as the xxy pixel. A second font memory in which character font data having a character size of X × Y pixels having n times is stored.

Reference numeral 62 denotes a character code of character font data according to the teletext information decoded by the teletext decoder 52 and a character of character display data according to previous teletext information previously stored in the display memory 56. A character code comparison processing unit which compares codes, detects data portions updated and changed over time, and reads and outputs character font data corresponding to the detected data from the second font memory 60.

Also, reference numeral 64 combines the character display data of the normal character size from the display data processing unit 54 and the character font data of which the character size is converted from the character code comparison processing unit 62 to perform data synthesis. A data synthesizing section output to the 42) side is shown.

Here, the control unit 32 shown in FIG. 1 recognizes the determination value of the data type from the data type determination unit 44 and performs the decoding operation of the teletext decoder 52 in accordance with another embodiment of the present invention. In addition to enabling control, the result of comparing the character code from the character code comparison processing unit 62 is input to recognize the update change state of the teletext information.

Next, an operation according to another embodiment of the present invention made as described above will be described in detail with reference to FIG. 6.

First, as shown in FIG. 1, when the tuner 4 tunes an RF signal for a predetermined broadcast channel and outputs it as an intermediate frequency signal, the image signal intermediately amplified through the image IF unit 6 is an image detector. (8) through the image signal processing of the image signal processing unit 12 and the amplification processing by the image output unit 14 through the signal amplification by the image amplification unit 10, the image reproduction through the CRT (16) The horizontal / vertical deflection coil of the CRT 16 is deflected by the driving of the vertical / horizontal deflection driving unit 20 driven based on the horizontal / vertical synchronization signal separated from the synchronization separating unit 18, thereby causing an image. A normal reproduction of the screen is possible, and the voice signal is detected by the voice detector 22, the voice signal is processed by the voice signal processor 24, and voice is reproduced through the speaker.

In this state, the teletext processing unit 28 decodes the teletext information data extracted from the synchronization separating unit 18 and the data slicer 26 to detect a portion of the data that has been updated and changed over time, and to update the changed data. A processing operation for converting the character size of the data is performed, and the teletext information data whose data type is determined by the data type determination unit 44 of the teletext processing unit 28 is stored in the teletext memory 46. Then, the teletext decoder 52 is controlled by the control program data of the program memory 48 to decode the teletext information data and display character font data of a normal character size for displaying the teletext information on the first font. The data is read out from the memory 58 and output.

On the other hand, the character code comparison processing unit 62 compares the character font data of the teletext information according to the time decoded from the teletext decoder 52 with the character code comparison data previously stored in the display memory 56 in advance. As a result, the second font memory 60 is accessed and the character font data of the variable character size corresponding to the update-modified data portion is read and outputted by detecting the update-modified data portion having different character codes.

Accordingly, the data synthesizing unit 64 reads out the character display data of the normal character size processed by the display data processing unit 54 from the second font memory 60 from the character code comparison processing unit 62. By synthesizing the converted character font data of the converted character size to the display interface 42 side, the character display signal of the teletext information which has undergone the interface operation of the display interface 42 is converted into the image signal of the image signal processor 12. Through the processing, the size of characters corresponding to data updated and changed over time is displayed on the CRT 16 screen in a converted form.

According to the present invention made as described above, a screen having a display processing function of teletext information data detects a portion of the data that has been updated and changed over time, so that the screen has a variable character size compared to the character size of unupdated data. According to the display, it is possible to easily recognize the partially updated information in the teletext information.

Claims (5)

Detects and amplifies the video signal of the television broadcast tuned by the tuner 4 and amplified by the image IF unit 6 through the image detector / amplifiers 8 and 10 and through the image signal processor 12. In a television which processes a video signal and plays back a video on the CRT 16 via the video output unit 14, Data extraction means (18,26) for extracting teletext information data in a vertical retrace period by a synchronization signal separated from the video signal; The teletext memory means 46 which stores the determined teletext information data when the type of data is extracted by the data extraction means 18 and 26 and determined by the data type determination means 44, Program memory means (48) having stored therein control program data for controlling character size conversion for updated and changed data, as well as general control over the display of teletext information data; Font memory means (50) for storing character font data for characterizing teletext information data from said teletext memory means (46), and for converting and displaying character size for updated and changed data portions. ), When the font recognition method is received by the control program data of the program memory 48 to receive the update recognition data that designates the updated and changed data portion by decoding the teletext information data from the teletext memory 46, the font memory ( A teletext decoder 52 which receives the text font data from 50) and outputs the changed font size for the updated changed data portion; Display data for processing the text font data according to the decoded and applied teletext broadcasting so as to display the data, and for performing data processing for displaying the text font corresponding to the updated and changed data portion with the converted text size. Output processing means (54,56), By controlling the decoding operation of the teletext decoder 52 on the basis of the determination value of the data type through the data type determination means 44, the teletext information data can be displayed on the screen. Control means (32) for detecting the received update recognition data included in the control unit so as to enable the conversion display of the character size for the updated and changed data portion; Display interface means 42 for converting the character display data of the teletext broadcasting data processed by the display data output processing means 54, 56 into an R / G / B signal form and outputting the converted signal to the image signal processing section 12. And a change information data display processing device for teletext information. 2. The font memory means (50) according to claim 1, wherein the font memory means (50) comprises a first pixel font storage area (50A) in which character font data of a general character size having x x y pixels is stored, and n times larger than the x x y pixel size. And a second pixel font storage area (50B) in which character font data having a large X × Y pixel is stored. The update recognition data of the teletext information signal includes: a page content update designation bit for designating an update state of a predetermined content of a page, a program table update designation bit for designating an update state of a broadcast program table itself, and a character; Update information designation data having character / number update designation bits respectively specifying update of the / number, and update information position designation data composed of the update character position information and the update numeric position information; When the update information designation data is detected, character display conversion control is executed by the program memory 48, and the teletext decoder 52 decodes the position recognition of the update character / number by the update information position designation data. A change information data display processing apparatus for teletext information, characterized by controlling to perform processing. Detects and amplifies the video signal of the television broadcast tuned by the tuner 4 and amplified by the image IF unit 6 through the image detector / amplifiers 8 and 10 and through the image signal processor 12. In a television which processes a video signal and plays back a video on the CRT 16 via the video output unit 14, Data extraction means (18,26) for extracting teletext information data in a vertical retrace period by a synchronization signal separated from the video signal; The teletext memory means 46 which stores the determined teletext information data when the type of data is extracted by the data extraction means 18 and 26 and determined by the data type determination means 44, Program memory means (48) having stored therein control program data for overall control of the on-screen display of teletext information data; Controlled by the control program data of the program memory 48 to decode the teletext information data from the teletext memory 46 and to display the character font data of the normal character size according to the teletext broadcast. Outputting teletext decoder 52, Character display data of the previously received teletext broadcast is stored in advance, and the text font data according to the teletext broadcast from the teletext decoder 52 can be displayed on the screen, and the data processing is completed. Display data output processing means (54, 56) for uploading and storing the data; Font memory means for storing character font data for character size conversion of the updated and changed data portion while providing character font data of a normal character size; Character font data from the teletext decoder 52 and a character code of character display data previously stored in the display data output processing means 54 and 56 are compared and detected to detect and update the changed data portion from the font memory means. Character code comparison processing means (62) for reading and outputting character font data for character size conversion of a; Data synthesis for synthesizing and displaying character font data having normal character size from the display data output processing means 54 and 56 and character font data having a variable character size from the character code comparison processing means 62; Means 64, Control means 32 for controlling the display of the received teletext information data and receiving a result of the code comparison from the character code comparison processing means 62 and recognizing the update change state of the information; , And a display interface means (42) for converting the character display data of the teletext broadcasting from the data synthesizing means (64) into an R / G / B signal and outputting the signal to the video signal processor (12). A change information data display processing apparatus for teletext information. The teletext decoder 52 according to claim 4, wherein the font memory means stores character font data having a character size of a typical x x y pixel and is controlled by control program data of the program memory 48. A first font memory 58 accessed by the < RTI ID = 0.0 > and < / RTI > character font data having a character size of XxY pixels having n times the size of the xxy pixel size and stored therein. And the change information data display processing apparatus for teletext information, characterized in that it is configured separately by a second font memory (60) accessed by the second font memory (60).