KR19980075179A - Television set with automatic output of changed text content - Google Patents

Abstract

The present invention relates to a television receiver having a function of automatically outputting changed text contents to search for an information area designated by a user and to automatically output the changed text contents on a screen when the changed contents are received. A function selection means for selecting an update automatic search function and setting a target information area for which the automatic search function is to be executed, and performing an update search of text data for the user-specified page set by this function selection means in accordance with a predetermined control signal, and updating the text data. When the contents are confirmed, a teletext decoder for outputting an image signal for a corresponding text screen, and outputting a predetermined control signal for a text search and automatic output function to the teletext decoder according to a user's function selection through the function selection unit. Means, the teletex To the first switch to the video signal that is output from the decoder comprises switching means for outputting, and a CRT driving means for driving a CRT from the switching means on the basis of the video signal that is output characterized in that configured.

Description

Television set with automatic output of changed text content

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver having a teletext reception function. In particular, when a changed information is received by searching a user-specified information area, the changed text content is automatically output to the screen. A television receiver with a function is provided.

In order to meet the various information needs of viewers recently, domestic and international news as well as information on economics, sports, tourism and leisure, cultural arts, life / science / broadcasting information, stock news, etc. have been edited into letters and figures, and then encoded. Therefore, a text multicasting program (hereinafter referred to as teletext) is provided that transmits in the form of a digital signal in a vertical retrace period of a video signal so that viewers can freely use desired information. It is a block diagram schematically showing a conventional television receiver equipped.

In FIG. 1, reference numeral 1 denotes an antenna for receiving an airwave broadcasting signal, 2 denotes a tuner for tuning a viewing channel selected by a user among broadcast signals received by the antenna 1, and 3 denotes a tuner ( IF amplification unit for amplifying and outputting the intermediate frequency (IF) signal output from 2), 4 is a video intermediate frequency (PIF) signal and audio intermediate frequency (SIF) from the intermediate frequency signal amplified by the IF amplifier (3) P / S separation section that separates and outputs signals.

Further, reference numeral 5 denotes a voice detector for detecting a voice signal from a voice intermediate frequency (SIF) signal separated and output from the P / S separator 4, and 6 denotes a voice output from the voice detector 5. Although not shown for the signal, a voice processor for performing voice processing such as bass, treble, volume, etc. according to a control signal from the microprocessor 16, which will be described later. It is an audio amplifier which amplifies the audio signal processed by the processor 6 and outputs it through the speaker 8 connected to the rear stage.

On the other hand, reference numeral 9 is an image detector for detecting an image signal from an image intermediate frequency (PIF) signal output from the P / S separation unit 4, and 10 is an image signal output from the image detector 9 Color, tint, brightness, and the like are processed according to control signals from the microprocessor 16 for R (Red), G (Green), and B (Blue). ) Is an image processor that outputs a signal.

Reference numeral 14 is a remote control device having a predetermined function key for receiving teletext data, 15 is a receiving unit for receiving an infrared signal transmitted from the remote control device 14 and converting it into an electrical code signal, and 16 It is a microprocessor as a control unit which controls the entire apparatus based on the code signal output from the receiving unit 15.

On the other hand, reference numeral 20 detects a teletext (TXT) data signal contained in a vertical retrace section of a broadcast signal according to a control signal output from the microprocessor 16, and processes the detected data signal to A teletext (TXT) decoder for outputting a text image signal, the teletext decoder 20 having a text (TXT) for detecting a teletext (TXT) data signal from the image signal output from the image detector (9). And a text signal processing stage 40 for processing the teletext signal detected by the text detecting terminal 30 and outputting a video signal corresponding to the text content. have.

That is, the conventional teletext receiving television receiver having the above-described configuration is provided with the microprocessor 16 in the teletext (TXT) decoder 20 as the user selects the teletext (TXT) mode through the remote control apparatus. By controlling the text signal processing stage 40 to extract and process the text signal from the broadcast signal, the viewer is provided for each field by operating the button keys installed on the remote control device while checking the information content output on the screen You can select the desired information from the text information and print it out in units of pages.

On the other hand, the teletext information transmitted from the broadcasting station is subject to change at a certain point in time, the user can not know the update time, there is a inconvenience to check the information of the page of interest whenever you want, sometimes There was a problem that could not be timed and missed the newly updated information.

The present invention was created in view of the above circumstances, and automatically outputs the changed text contents to automatically output the changed text contents on the screen when the changed contents are received by searching the contents of the information area designated by the user at regular intervals. The purpose is to provide a fully featured television receiver.

1 is a block diagram showing the internal structure of a conventional television receiver equipped with a teletext broadcast reception function;

2 is a functional block diagram schematically showing a television receiver equipped with an automatic text content outputting function according to an embodiment of the present invention;

Explanation of symbols on the main parts of the drawings

1 antenna 2 tuner (TUNER)

3: IF amplification unit 4: P / S separation unit

5: voice detector 6: voice processor

7: voice amplifier 8: speaker

9: Image detector 10: Image processor

11: switching unit 12: CRT driving unit

13: CRT 14,24: remote control device

15,25: receiver 16,26: microprocessor

20,200: Teletext decoder 30,300: Text data detection stage

40,400: text signal processing stage

300a: TXT data extraction unit 300b: synchronization separation unit

400a: TXT data processing unit 400b: program data storage unit

400c: 1 frame TXT storage unit 400d: TXT image processing unit

400e: Extraction area information storage unit

A television receiver having an automatic text content output function according to the present invention for realizing the above object comprises: function selection means for selecting an update automatic retrieval function for teletext received information and setting a target information area for executing the automatic retrieval function; A teletext decoder which executes an update search of text data on a user-specified page set by the function selecting means according to a predetermined control signal and outputs an image signal for the corresponding text screen when the update contents are confirmed. Control means for outputting a predetermined control signal for text search and automatic output function to the teletext decoder according to a user's function selection, switching means for preferentially switching and outputting an image signal output from the teletext decoder, and the switching Output from Sudan That the image signal is configured to include a CRT driving means for driving a CRT on the basis of features.

That is, according to the present invention having the above-described configuration, the user can check the contents every time there is a changed content even if the user does not search for the newly updated contents by searching the teletext reception information every time.

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

FIG. 2 is a block diagram showing a television receiver equipped with a function for automatically outputting changed text contents according to an embodiment of the present invention, wherein like reference numerals are used for components which perform substantially the same functions as those shown in FIG. The detailed description thereof will be omitted.

In FIG. 2, reference numeral 24 denotes a remote controller having an additional automatic search button for update information on teletext reception information, and 25 denotes an infrared signal transmitted from the remote controller 24 and converted into an electrical signal. The receiver 26 is a microprocessor as a controller for controlling the entire apparatus in accordance with the contracted code signal output from the receiver 25.

In addition, reference numeral 200 is a teletext decoder equipped with a function of searching for updated text data for a user specified page and automatically outputting the corresponding text screen, and the teletext decoder 200 includes a TXT data extractor ( Text data detection stage 300, TXT data processing unit 400a, program data storage unit 400b, 1-frame TXT storage unit 400c, TXT image processing unit 400d, The text signal processing stage 400 is provided with the extraction area information storage unit 400e.

On the other hand, the text (TXT) data detection unit 300 extracts a synchronization signal (300b) and a teletext (TXT) signal for separating the synchronization signal from the composite video signal output from the image detector (9) It consists of a text clock signal (TCL) and a TXT data extraction unit (300a) for outputting a text data signal (TDT) corresponding thereto, the text signal processing stage 400 is automatically searched for updates through the remote control device (24) When the function is set, the one-frame TXT storage unit 400c stores one page of decoded text data for the information area designated by the user, and the extraction area information storage unit registers and sets index data of the user-specified information area. 400T and the TXT data extraction unit 300a is driven and controlled based on the index information registered in the extraction area information storage unit 400e under the control of the microprocessor 26. TXT data for controlling the output of the text image signal by extracting the text signal and decoding the extracted text data and comparing it with the data stored in the one-frame TXT storage unit 400c. Program data in which the processor 400a and the TXT image processor 400d for outputting a text image signal corresponding thereto are output based on the text signal decoded and output by the TXT data processor 400a and the decoder. It is composed of a storage unit 400e.

Next, the operation of the device having the above configuration will be described.

When the user selects the teletext mode by operating the remote controller 24 while watching TV, the microprocessor 26 outputs a predetermined control signal to the teletext decoder 200 to execute a text data decoding function.

The decoding operation of the text data is performed by the TXT data processing unit 400a included in the teletext decoder 200 in response to a control signal applied from the microprocessor 26 based on the synchronization signal detected by the synchronization separation unit 300b. Accordingly, it is executed by outputting a sampling signal WIND for text data extraction. The TXT data extraction unit 300a extracts the teletext data contained in the vertical retrace section of the composite image signal CVS based on this. The text clock signal TCL and the text data signal TDT are output to the TXT data processor 400a.

As the text clock TCL and the text data signal TDT are obtained by the above process, the TXT data processor 400a uses the text clock TCL based on the data stored in the program data storage 400b. ) And text data (TDT) are decoded to supply data necessary for screen composition by one line for 8-bit parallel data.

On the other hand, when the user who is watching the teletext screen selects the desired information area and enters the corresponding page, when the user presses the automatic update contents search button (not shown) of the remote control device 24, the microprocessor 26 outputs a predetermined control signal to the TXT data processing unit 400a in the teletext decoder 200. Accordingly, the TXT data processing unit 400a converts the information area selected by the user into the search target information area. Determine and store the text data of the currently designated user-decoded area in the one-frame TXT storage unit 400c by one frame and register the index data of the corresponding information area in the extraction area information storage unit 400e. By doing so, you can prepare evidence for retrieving updated content.

Thereafter, while the user switches a viewing channel to a general broadcasting channel to watch a program of the corresponding channel, the TXT data processing unit 400a inside the teletext decoder 200 performs the extraction region information storage unit 400e at a predetermined time. The TXT data extraction unit 300a is driven to extract the teletext data of the corresponding information area based on the index data set in the above, and the extracted text data is decoded and stored in the one-frame TXT storage unit 400c. By comparing with the text data, it is determined whether or not the data of the information area designated by the user is updated.

The TXT data processing unit 400a determines that the corresponding information is updated when the extracted data decoded from the user designated area is not the same as the data stored in the one-frame TXT storage unit 400c, and the microcomputer is updated. Regardless of the control signal from the processor 26, the decoded text data is output to the TXT image processing unit 400d so that the color tone signals R, G, B and the blanking signal T for the text screen of the updated contents are displayed. It is controlled to be applied to the switching unit (11).

Meanwhile, the text image signal is preferentially switched by the text blanking signal T. The text image signal output from the switching unit 11 is transferred to the CRT 13 through the CRT driver 12. By being outputted, a text screen of newly updated contents is automatically displayed on the screen.

That is, according to the above embodiment, when the changed information is received by searching for the information area designated by the user, the television receiver with the automatic output of the changed text content can be realized to automatically output the changed text content on the screen.

Meanwhile, the present invention is not limited to the above embodiments and can be variously modified within the scope not departing from the technical gist of the present invention.

As described above, according to the present invention, the user can designate and set an information area of interest so that the user can check the contents every time there is a changed content even if the user does not search for the newly updated contents by searching the teletext reception information every time. Will be.

Claims (2)

Function selection means for selecting an update automatic retrieval function for the teletext received information and setting a target information area for executing the automatic retrieval function; A teletext decoder for executing an update search of the text data for the user-specified page set by the function selecting means according to a predetermined control signal and outputting a video signal for the corresponding text screen when the update contents are confirmed; Control means for outputting a predetermined control signal for text search and automatic output function to the teletext decoder according to a user's function selection through the function selection unit; Switching means for first switching and outputting a video signal output from the teletext decoder; And a CRT driving means for driving a CRT on the basis of an image signal output from the switching means. The method of claim 1, The teletext decoder includes a one-frame TXT storage unit for storing one page of decoded text data for an information area designated by a user when the update automatic search function is set by the function selection means, and a user specified information area. An extraction region information storage unit for registering and setting index data, a synchronization separator for separating a synchronization signal from the composite video signal, a text clock signal (TCL) corresponding to extracting a teletext (TXT) signal according to a predetermined control signal, and TXT data extracting unit for outputting text data signal TDT, and TXT data extracting unit driving control on the basis of the index information registered in the extraction area information storage unit under the control of the control means; Extracting the text data and decoding the extracted text data and storing the extracted text data in the one-frame TXT storage unit. A TXT data processor for controlling whether or not the text image signal is output by comparing the data with the same data; and a TXT image processor for outputting a text image signal corresponding to the text signal decoded and output by the TXT data processor. And a television receiver having an automatic output of changed text contents.