KR0165762B1 - Teletext broadcasting receiving amplication apparatus in tv receiver - Google Patents

Abstract

The present invention relates to a reception sensitivity amplification apparatus for a TV receiver for amplifying a reception sensitivity of a character broadcast having a low reception sensitivity due to the influence of the surrounding environment when switching to a character broadcasting while watching a general TV signal. If there is an obstacle such as a building or a mountain, the reception sensitivity decreases when receiving a text broadcast transmitted from a broadcasting station, and an error occurs in the received text, causing the screen to flicker or be distorted when the viewer watches the text broadcast. In order to eliminate the drawbacks, in the character broadcasting processing apparatus of a television receiver, the code of the digitized character information is compared and judged by conventional decoding means, an error code is selected and compared with the set data, and displayed on the CRT screen as OSD characters. Allow viewers to be certain and Including the reception sensitivity amplification means for amplifying the reception sensitivity of text broadcasting by changing the frequency of data to a certain level and inputting it to the TV microcomputer. By adjusting the reception sensitivity to a certain level when receiving the character broadcast transmitted from the user, it prevents the occurrence of an error of the received character by removing the phenomenon that the screen is shaken or distorted when the viewer watches the character broadcast. It can provide a screen.

Description

Receiver sensitivity amplification device for TV receivers

1 is a block diagram showing an apparatus for processing text information during teletext of a general television set (TV).

2 is a block diagram showing a configuration relationship including a device for amplifying the reception sensitivity during the character broadcast of the television receiver according to the present invention.

FIG. 3 is a flow chart showing the operation relationship of the apparatus for amplifying reception sensitivity during character broadcasting of the television receiver of FIG.

* Explanation of symbols for main parts of the drawings

100: tuner 200: TV microcomputer

220: character broadcasting micom 240: memory unit

300: video processor

320: CVBS (Composite Video Board casting Signal) demodulation unit

400: CRT 500: Decoder

600: sound processor and amplifier 620,640: speaker

700: reception sensitivity amplifier 710: character code reader

720: code error selection unit 730: error data transmission unit

740: comparison determination unit 750: OSD (On Screen Display) transmission unit

760: sequential data memory unit 770: miss tuning instruction transfer unit

780: Miss tuning unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for converting and watching a broadcast signal transmitted from a broadcasting station when watching a television receiver (Teletext), and in particular, when switching to text broadcasting while watching a general broadcast signal of a television receiver. The present invention relates to a reception sensitivity amplifying apparatus for a television receiver text broadcasting to amplify the reception sensitivity of a text broadcasting having a poor reception sensitivity due to an environment.

More specifically, when switching to a character broadcast while watching a general broadcast signal of a television receiver, the character broadcast signal having a low reception sensitivity is amplified to a certain level due to the influence of the surrounding environment (for example, obstacles such as high buildings or mountains). It is to provide a stable text broadcasting screen to the viewer by preventing the occurrence of an error in the text in advance.

Teletext refers to an information service for displaying text pages and images mainly composed of character information on a CRT screen of a television receiver.

That is, the desired information is transmitted as part of a television broadcast signal or as a coded telephone signal by a telephone line, and the desired information can be extracted from a normal television broadcast signal or from a telephone line by a special coding circuit installed in the television receiver. It is supposed to be.

These decoders are used to select and accumulate the necessary information pages and display them on the CRT screen. In the UK, Teletext (Ceefax, Oracle), Germany Video Text, Japan NHK, and France It is called an antiope.

In the present invention, a television receiver (TV) will be proposed.

In general, an apparatus for processing text information on a screen of a CRT 400 by receiving a character broadcast signal transmitted from a broadcast station is a tuner for receiving a broadcast signal transmitted from a broadcast station, as shown in FIG. (100), a TV microcomputer (200) for processing the broadcast signal received by the tuner (100) by the set program, and a character broadcasting microcomputer (processing only the data of the character information among the broadcast signals processed by the TV microcomputer (200). 220, the memory unit 240 for storing the character information processed by the TV microcomputer 200 and the character broadcasting microcomputer 240, and the broadcast signal processed by the TV microcomputer 200 to process vivid colors (R, G) , B) and the video processor 300 generating the composite video board casting signal (CVBS) and the vivid color (R, G, B) signals processed by the video processor 300 are displayed on the screen. CRT (400) to display on, and The character broadcasting microcomputer receives the CVBS demodulator 320 and the CVBS demodulator 320 demodulated by the CVBS demodulator 320 to demodulate the composite video signal CVBS modulated and generated by the processor 300. The decoder 500 digitizes the composite video signal CVBS and inputs the video signal to the video processor 300 according to the character information control signal of 220, and processes the audio signal decoded by the decoder 500 to fix the voice signal. A sound processor and an amplifier 600 are amplified to a level and output to the speakers (620, 640).

That is, the apparatus for processing the character information when the television receiver (TV) configured as described above when the character broadcasts, when the broadcast signal transmitted from the broadcasting station through the tuner 100 receives the broadcast signal received by the TV microcomputer 200 Receives and processes the received broadcast signal as a whole and inputs it to the text broadcasting microcomputer 220 and the video processor 300.

The text broadcasting microcomputer 220 processes the text broadcasting signal among the broadcast signals processed by the TV microcomputer 200 by using a set program, and stores the processed text broadcasting data in the memory unit 240 and controls the decoder 500. Output the signal.

In this case, the TV microcomputer 200 processes contrast, bright, and color (R, G, and B) signals, which are the maximum contrast ratios of the screen for the broadcast signal received through the tuner 100, by a set program. Input to the video processor 300.

Accordingly, the video processor 300 processes the broadcast signal processed by the TV microcomputer 200 to output vivid color (R, G, B) signals to the CRT 400 and to input the composite video signal CVBS. Is generated and input to the CVBS demodulator 320.

That is, the CVBS demodulator 320 demodulates the composite video signal CVBS input by being modulated by the video processor 300 into an original signal and inputs the same to the decoder 500.

The decoder 500 decodes the composite video signal CVBS from the CVBS demodulator 320 by the text broadcasting control signal of the text broadcasting microcomputer 220 and demodulates the input video signal. Digitalize the color (R, G, B) data necessary for text broadcasting into the video processor 300.

Thus, the video processor 300 converts the color (R, G, B) signal of the broadcast signal processed and input from the TV microcomputer 200 and the composite video signal (CVBS) digitized and input from the decoder 500 into the CRT (400). ) Is output to the screen, and the character broadcast is displayed along with the video signal on the CRT (400) screen.

In addition, the audio signal decoded by the decoder 500 is processed through the sound processor and the amplifier 600, and the audio signal is amplified to a predetermined level and output to the speakers 620 and 640 so that the viewer can listen to the voice information. .

However, the apparatus for processing the above text information has a problem that the reception sensitivity is reduced when receiving a text broadcast transmitted from a broadcasting station if there is an obstacle such as a tall building or a mountain when switching to the text broadcasting while watching a general broadcast signal of a television receiver. An error occurred in the generated and received texts, and thus, a phenomenon such as a screen flickering or distortion occurred when a viewer watched a text broadcast was generated.

The present invention is intended to solve the above-mentioned shortcomings, and for the purpose of amplifying the reception sensitivity of a character broadcast having a poor reception sensitivity due to the influence of the surrounding environment when switching to a character broadcast while watching a general broadcast signal of a television receiver. In providing a device.

Another object of the present invention is to amplify the reception sensitivity to a certain level when receiving a character broadcast transmitted from a broadcasting station if there is an obstacle such as a high building or a mountain when switching to a character broadcast while watching a general broadcast signal of a television receiver. It is possible to provide a stable screen by eliminating the phenomenon that the screen shakes or distorts when a viewer watches a character broadcast by preventing occurrence.

In order to realize the present invention having the above objects, in a character broadcasting processing apparatus of a television receiver, an existing character decoding unit reads a code of character information digitized by an existing decoding means, selects an error code, and compares it with the set data to determine OSD text rate CRT. It is characterized by including a receiving sensitivity amplifying means for displaying on the screen so that the viewer can confirm, amplifying the received error data to a certain level to amplify the reception sensitivity of the character broadcast and input it to the TV microcomputer.

This will be described with reference to the accompanying drawings.

FIG. 2 is a block diagram showing a configuration relationship including an apparatus for amplifying reception sensitivity in a character broadcast of a television receiver according to the present invention.

A tuner 100 for receiving a damage signal transmitted from a broadcasting station, a TV microcomputer 200 for processing the broadcast signal received by the tuner 100 by a set program, and a character from a broadcast signal processed by the TV microcomputer 200; Text broadcasting microcomputer 220 for processing only the data of the information, the memory unit 240 for storing the character information processed by the TV microcomputer 200, and the broadcast signal processed by the TV microcomputer 200 to process the vivid color ( R, G, B), the video processor 300 generating the composite video signal CVBS, and the vivid color (R, G, B) signals processed by the video processor 300 are displayed on the screen. The CRT 400, the CVBS demodulator 32 for demodulating the composite video signal CVBS generated and modulated by the video processor 300 into the original signal, and the CVBS demodulator 320 demodulates the original signal. Character information control signal of the text broadcasting microcomputer 220 receiving the received composite video signal The composite video signal CVBS is digitized, and the decoder 500 inputs to the video processor 300 and the audio signal decoded by the decoder 500 are processed and amplified to a predetermined level to the speakers 620 and 640. In the character broadcasting processing apparatus of a television receiver having a sound processing unit and an amplifier 600 for outputting, the decoder 500 reads the code of the digitized character information, selects an error code, compares the set data with the set data, and displays the OSD characters. The reception sensitivity amplification apparatus 700 which is displayed on the screen of the CRT 400 so that the viewer can check it, changes the frequency of the generated error data to a predetermined level, amplifies the reception sensitivity of the text broadcasting, and inputs it to the TV microcomputer 200. ) To be included.

The reception sensitivity amplifier 700 includes a character code reading unit 710 for reading a character code by reading the character information digitized by the decoder 500 and a reception sensitivity among the character codes read by the character code reading unit 710. A code error selection unit 720 for selecting a character code in which an error occurs due to a low value, and an error data transmission unit for transmitting error data of the character code selected by the code error selection unit 720 to the mistuning command transfer unit 770. 730, a comparison determination unit 740 that codes and compares the error of the character code selected by the code error selection unit 720, and the error data that is coded and compared and judged by the comparison determination unit 740 in order. The sequential data memory unit 760 and the execution judgment for tuning the error data, which are coded by the comparison determination unit 740 and compared, are output to the video processor unit 300 as OSD characters, so that the viewer can display the screen of the CRT 400. The OSD transmission unit 750 for viewing and confirming, and the error code transmitted from the error data transmission unit 730 and the error data stored in the sequential data memory unit 760 by reading the error tuning command error tuning Frequency is modulated (e.g., ± 0,2 MHz) by the miss tuning command transfer unit 770 transmitted to the unit 780, and the error code tuning command transmitted from the miss tuning command transfer unit 770 to improve reception sensitivity. The miss tuning unit 780 is amplified and input to the TV microcomputer 200.

3 is a flowchart showing an operation relationship of an apparatus for amplifying the reception sensitivity of a text broadcasting signal transmitted from a broadcasting station during the text broadcasting of a television receiver according to the present invention.

When the television receiver (TV) is turned on in step S301, watching the normal broadcasting mode (S302), determining whether to switch to the text broadcasting mode while watching the general broadcasting mode (S303), and step S303 In step S304-1, if the user does not switch to the text broadcasting mode while watching the normal broadcast mode, the character code is switched when the user switches to the text broadcasting mode while watching the general broadcast mode in step S303. In step S304, and when the character code is read in step S304, selecting only the error code from the read character code in step S305, and if the error code is selected in step S305, the character code of the selected error Step S306 of encoding and comparing the data, and sequentially storing the data judged to be compared in step S306, outputting an execution phrase for tuning to OSD characters (S307), and determining in step S307. Having been The controller determines whether to tune the character code of the generated error when the save and execute phrase is output (S308), and if it is determined in step S308 that the character code of the error is not to be tuned. If it is determined that the character code of the error is to be tuned in step S309-1 and step S308, the character code is output as it is on the CRT screen, and frequency error is modulated in a predetermined band (eg, ± 0,2 MHz) to correct the error. Tuning to amplify the reception sensitivity (S309), and if the error generated in step S309 is tuned, determining whether the tuned text broadcasting signal is good (S310), and the result determined in step S310 is tuned. If the character broadcast signal is not good, the process returns to step S309 and retunes. If the tuned character broadcast signal is good, the tuned text broadcast signal can be viewed in step S311.

Hereinafter, the operation and the effect according to an embodiment of the present invention will be described with reference to the accompanying drawings.

When the TV receiver is turned on by supplying power (S301), when a broadcast signal transmitted from a broadcasting station is received through the tuner 100, the TV microcomputer 200 transmits the broadcast signal received to the tuner 100 by the set program. The process is input to the text broadcasting microcomputer 220 and the video processor 300, respectively.

The text broadcasting microcomputer 220 processes the text broadcasting signal among the broadcast signals processed by the TV microcomputer 200 by using a set program, and stores the processed text broadcasting data in the memory unit 240 and controls the decoder 500. Output the signal.

At this time, the TV microcomputer 200 processes the contrast, bright and color (R, G, B) signals, which are the maximum contrast ratios of the screen, with respect to the broadcast signal received through the tuner 100 by using a set program to process the video processor 300. Type in

Therefore, when the video processor 300 processes the broadcast signal processed by the TV microcomputer 200, it outputs a vivid color (R, G, B) signal and inputs it to the CRT (400) for vivid color (R, G, B). Display the video signal of the on-screen so that the viewer can watch the normal broadcast mode (S302).

In addition, since the voice signal decoded by the decoder 500 is processed through the sound processor and the amplifier 600, the voice signal is processed, amplified to a predetermined level, and output to the speakers 620 and 640 so that the viewer can listen to the voice information. have.

In this case, the composite video signal CVBS generated by the video processor 300 is demodulated into an original signal via the CVBS demodulator 320, input to the decoder 500, and decoded into a digital signal.

When switching to the text broadcasting mode while watching the general broadcast (S303), the character code reading unit 710 of the reception sensitivity amplifying apparatus 700 is decoded by the decoder 500 to read a character code necessary for text broadcasting from the digitized signal. Read (S304).

If the normal broadcast is not switched to the character broadcast mode while watching (S303), the viewer can continue to watch in the normal broadcast mode (S304-1).

When the character code is read in the character code reading unit 710, the read character code selects only the character code in which the error occurs in the character code read through the code error selecting unit 720 (S305).

That is, the character code in which an error occurs is input to the miss tuning command transmission unit 770 through the error data transmission unit 730 and input to the comparison determination unit 740 to encode the selected error code (for example, 10101010). Compare and read (S306).

Error data coded by the comparison determination unit 740 is sequentially stored in the sequential data storage unit 760, and outputted as OSD characters through the OSD transfer unit 750 to tune the error data. It is delivered to the video processor 300 so that the viewer can check the error occurred by viewing the CRT (400) screen (S307).

It is determined that the character code generated by checking the error occurred during the character broadcast by viewing the screen of the CRT (400) (S308), the miss tuning unit 780 is a command input from the miss tuning command transmission unit 770 By modulating the frequency in a certain band (for example, ± 0,2MHz) by tuning the character code error is input to the TV microcomputer 200 and the text broadcasting microcomputer 240 (S309).

Here, the method in which the miss tuning unit 780 modulates a frequency in a predetermined band (for example, ± 0,2 MHz) by a command input from the miss tuning command transfer unit 770 to tune a character code in which an error occurs is performed. Modulate by ± 0,2MHz to find the most appropriate value.

On the other hand, if it is determined that the error occurred during the character broadcast by viewing the CRT (400) screen is not determined to tune the generated character code (S308), the character broadcast micom 240 decoder the character code in which the error occurred decoder 500 And the video processor 300 to output to the CRT (400) screen as it is so that the viewer can watch the character broadcast is generated error (S309-1).

When the miss tuning unit 780 modulates a frequency, tunes a character code in which an error occurs, amplifies the reception sensitivity to a predetermined level, and inputs the received character code into the character broadcast micom 240. It is determined whether the broadcast signal is good.

As a result of the determination, if the broadcast signal of the character code tuned and input by the miss tuning unit 780 is not good, the miss tuning unit 780 is a predetermined band (eg, ±) by the command input from the miss tuning command transfer unit 770. 0,2MHz) modulates the frequency to tune the character code error is input to the text broadcasting microcomputer 240 (S309).

However, if the broadcast signal of the character code tuned and input by the miss tuning unit 780 is satisfactory as a result of the determination in step S310, the character broadcast micom 200 transmits the tuned good character code to the decoder 500 and the video processor unit ( 300 to output to the screen of the CRT (400) so that the viewer can watch the screen of the tuned character broadcast (S311).

As described above, the present invention provides a device for amplifying the reception sensitivity of a character broadcast having a poor reception sensitivity due to the influence of the surrounding environment when switching to a character broadcast while watching a general broadcast signal, thereby switching to a character broadcast while watching a general broadcast signal. If there is an obstacle such as a tall building or a mountain in the city, the reception sensitivity is tuned to a certain level when receiving the text broadcast transmitted from the broadcasting station, which prevents the error of the received text. It is possible to provide a stable text information screen to the viewer by removing the phenomenon.

The reception sensitivity amplification apparatus for a television receiver text broadcasting according to an embodiment of the present invention has been described above, but the present invention is not limited thereto, and those skilled in the art will be able to apply and modify them in various ways.

Claims (2)

A tuner 100 for receiving a broadcast signal transmitted from a broadcasting station, a TV microcomputer 200 for processing the broadcast signal received by the tuner 100 by a set program, and a text signal from the broadcast signal processed by the TV microcomputer 200. Text broadcasting microcomputer 200 processing only the data of the information, the memory unit 240 for storing the character information processed by the TV microcomputer 200, and the broadcast signal processed by the TV microcomputer 200 to process the vivid color ( R, G, B), the video processor 300 generating the composite video signal CVBS, and the vivid color (R, G, B) signals processed by the video processor 300 are displayed on the screen. The CRT 400, the CVBS demodulator 320 for demodulating the composite video signal CVBS generated and modulated by the video processor 300 into an original signal, and the composite video signal modulated by the CVBS demodulator 320. By receiving the text information control signal of the text broadcasting microcomputer 220 The decoder 500 digitizes the signal CVBS and inputs it to the video processor 300, and processes the audio signal decoded by the decoder 500, amplifies to a predetermined level, and outputs the sound to the speaker 620 and 640. In the character broadcasting processing apparatus of a television receiver having a processing unit and an amplifier 600, the decoder 500 reads the code of the digitized character information, selects an error code, compares the determined data with the set data, and displays the CRT ( Display on the screen to enable the viewer to confirm, change the frequency of the generated error data to a constant level, tune the code of the character broadcast to amplify the reception sensitivity to a certain level and receive the input to the TV microcomputer 200 Sensitivity amplification apparatus 700, characterized in that the television receiver characterized in that it comprises a reception sensitivity amplification device. The apparatus of claim 1, wherein the reception sensitivity amplifier 700 reads the character information digitized by the decoder 500 to read the character code, and the character code reader 710. Code error selection unit 720 for selecting a character code in which an error is generated among the received character codes with low reception sensitivity, and error data of the character code selected by the code error selection unit 720 are transferred to the mistuning command transfer unit 770. An error data transmission unit 730 to be transmitted, a comparison determination unit 740 for encoding and comparing the error of the character code selected by the code error selection unit 720, and a comparison determination unit coded for the comparison determination unit 740 The sequential data memory unit 760 sequentially stores the error data, and the execution phrase for tuning the error data coded by the comparison determination unit 740 to be compared and judged as OSD characters to the video processor unit 300. The OSD transfer unit 750 allows the user to view and check the screen of the CRT 400 and the error code transmitted from the error data transfer unit 730 and the error data stored in the sequential data memory unit 760 to read the error data. Amplification of the received sensitivity by modulating the frequency by the miss tuning instruction transmission unit 770 for transmitting a command for tuning to the uncorrected tuning unit 780 and the error code tuning command transmitted from the miss tuning command transmission unit 770. Receiving sensitivity amplification device for character broadcasting, characterized in that it comprises a miss tuning unit 780 for inputting to the TV microcomputer 200.