KR19980075174A - Television receiver with automatic sub picture output of changed text contents - Google Patents

Abstract

The present invention relates to a television receiver having a sub-screen automatic output function of the changed text content to automatically output the changed text content through the sub-screen when the user searches the information area designated by the user. A television receiver equipped with an output function, comprising: function selection means for selecting an update automatic search function for teletext received information and setting a target information area for executing the automatic search function, and by this function selection means in accordance with a predetermined control signal; A teletext decoder for performing an update search of the text data with respect to the set user specified page, and outputting a hue and a first blanking signal for the corresponding text screen, when the update content is confirmed, according to the user's function selection through the function selection unit. Text inspection with teletext decoder And control means for outputting a predetermined control signal for an automatic output function, R ', G', B ', and a second blanking signal for generating a sub-picture, as well as color tone and text for the text screen from the teletext decoder. PIP processing means for preferentially switching and outputting a blanking signal when the blanking signal is applied, based on R ', G', B 'and blanking signals Y' outputted from the main picture composite video signal and the PIP processing means. Image processing means for outputting R, G, B and luminance signals (Y) for screen and sub-screen output, and CRT based on R, G, B and luminance signals (Y) output from the image processing means. It characterized in that it comprises a driving CRT driving means.

Description

Television receiver with automatic sub picture output of changed text contents

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver having a teletext receiving function. In particular, when a user changes a received information area and receives a changed information, the present invention automatically outputs the changed text content through a sub-screen. The present invention relates to a television receiver having a sub-screen automatic output function of the changed text content, which enables the user to continuously watch the program of the channel being watched and check the newly updated text content.

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 has been made in view of the above circumstances, and allows the user to automatically output the changed text contents through a sub-screen by searching the contents of the information area designated by the user at regular intervals and receiving the changed contents. It aims to provide a television receiver equipped with a sub-screen automatic output of the changed text contents so that users can watch the program of the channel being watched and check the newly updated text contents.

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 with an automatic sub-screen output of changed text contents according to an embodiment of the present invention;

Explanation of symbols on the main parts of the drawings

1 antenna 2,22,32 tuner (TUNER)

3,23,33: IF amplification part 4,24,34: P / S separation part

5,26,36: Voice detector 6,27,28: Voice processor

7: voice amplifier 8: speaker

9,25,35: Image detector 10,100: Image processor

11,120: switching unit 12: CRT driving unit

13: CRT 14,140: Remote Controller

15,150: receiver 16,160: microprocessor

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

31: PIP processing section 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 according to the present invention for realizing the above object is a function for selecting an update automatic search function for teletext reception information and setting a target information area for executing the automatic search function in a television receiver equipped with a sub picture output function. In accordance with the selection means and a predetermined control signal, an update search of the text data is executed for the user-specified page set by the function selection means, and when the update contents are confirmed, the hue and the first blanking signal T for the text screen are displayed. A teletext decoder for outputting, 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, R ', G' for generating a sub-screen, And outputting B 'and the second blanking signal Y' from the teletext decoder PIP processing means for preferentially switching and outputting the color tone (R, G, B) and the first blanking signal (T) for the first screen, the main screen composite video signal and the color tone output from the PIP processing means; Image processing means for outputting R, G, B and luminance signals (Y) for main and sub picture output based on the blanking signal, and R, G, B and luminance signals (Y) output from the image processing means. It characterized in that it comprises a CRT driving means for driving the CRT based on).

That is, according to the present invention having the above-described configuration, the user designates and sets the information area of interest so that the user can search for the teletext reception information every time and append the contents whenever there is a changed content, even if they do not look for newly updated contents. You can check the screen frequently.

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 sub-screen function television receiver equipped with a sub-screen automatic output function of changed text contents according to an embodiment of the present invention. In the drawing, reference numeral 22 denotes a first tuner for main-channel channel selection. TUNER), 23 is a first IF amplifier for amplifying an intermediate frequency (IF) signal output from the first tuner 22, and 24 is an image of an IF signal output from the first IF amplifier 23, respectively. A first P / S separation section made of, for example, a surface acoustic wave filter (SAW FILTER) for separating the intermediate frequency signal (PIF) and the voice intermediate frequency signal (SIF), and 25 is the first P / S separation section (24). A first video signal detector for detecting a video signal from the separated video intermediate frequency signal PIF1, and 26 is an audio signal from the voice intermediate frequency signal SIF1 separated and output from the first P / S separation unit 24. A first audio signal detector for detecting a signal.

On the other hand, reference numeral 32 is a second tuner for picture in picture (PIP) channel selection, 33 is a second IF amplifying unit for amplifying the intermediate frequency signal output from the second tuner 32, 34 is For example, the surface acoustic wave, such as the first P / S separation unit 24, that separates the IF signal output from the second IF amplifier 33 into an image intermediate frequency signal PIF and an audio intermediate frequency signal SIF, respectively. The second P / S separators 35 and 36 each made of a filter detect a video signal from the video / audio intermediate frequency signals PIF2 and SIF2 separated and output from the second P / S separator 34, respectively. 2 is a video signal detector and a second audio signal detector for detecting an audio signal.

In addition, reference numeral 140 is a remote control device further provided with a button for automatically updating the update content for the teletext reception information, and 150 receives an infrared signal transmitted from the remote control device 140 and converts it into an electrical signal. The receiving unit 160 is a microprocessor as a control unit which outputs a predetermined clock signal CL and a data signal DATA for controlling the entire apparatus according to the contracted code signal output from the receiving unit 150.

Reference numeral 120 denotes a composite video signal and first and second audio signals respectively output from the first and second video signal detectors 25 and 35 according to a predetermined control signal from the microprocessor 160. A switching unit for selectively switching the voice signal output from the detectors 26 and 36, respectively, reference numeral 28 denotes a voice for the main screen output from the switching unit 120 under the control of the microprocessor 160 A first audio processing unit for processing a signal, 7 is an audio amplifier for amplifying the audio signal processed by the first audio processing unit 28 and output to the speaker 8 connected to the rear stage, 27 is the switching unit 120 A second audio processing unit for processing the audio signal for the sub-screen output from the output through the headphone jack (not shown) installed in the TV main body.

On the other hand, the reference numeral 31 receives an image signal selected and output as the sub-screen image signal by the switching unit 120 based on this R ', G', B '(Red, Green, Blue) for generating the sub-screen And outputs a blanking signal (Y '), and when the color tone (R, G, B) and the blanking signal (T) for the text screen are applied from the teletext decoder 200, which will be described later, A PIP processing unit for outputting, and 100 denotes a main composite video signal output from the switching unit 120 and R ', G', B 'and blanking signals Y' output from the PIP processing unit 31. An image processor for outputting R, G, B and luminance signals (Y) for the main and sub-screen outputs, and 12 denotes the R, G, B and luminance signals (Y) output from the image processor (100). Is a CRT driving unit that drives the CRT 13 based on the "

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.

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

If the user selects the teletext mode by operating the remote controller 140 while watching TV, the microprocessor 160 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 160 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 processing unit 400a uses the text clock based on the data stored in the program data storage unit 400b. TCL) and text data (TDT) signals are decoded to supply data necessary for screen composition by one line in 8-bit parallel data format.

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 140, the microprocessor 160 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 160, 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. The control is applied to the PIP processing unit 31.

As a result, the text screen output signal, which is switched as the sub picture video signal by the PIP processing unit 31 and applied to the image processing unit 100, is output as a sub picture on the CRT screen via the CRT driving unit 12. As a result, the teletext information screen of the updated contents is automatically output to the subscreen on the screen.

That is, according to the above embodiment, a television receiver having a function of automatically outputting sub-screen of the changed text content is configured to automatically output the changed text content through the sub-screen when the user searches the information area designated by the user and receives the changed content. It becomes possible.

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 easily check and set the information area of interest through the sub-screen whenever there is a newly updated content without being disturbed by watching TV.

Claims (1)

In a television receiver having a sub picture output function, 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; Teletext outputting a search for text data on a user-specified page set by this function selection means in accordance with a predetermined control signal and outputting a hue and a first blanking signal T for the corresponding text screen. Decoder, 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; R ', G', B 'and second blanking signals (Y') for outputting sub-pictures are output, and color tones (R, G, B) and first blanking signals (for text screens) are transmitted from the teletext decoder. PIP processing means for preferentially switching and outputting when T) is applied, Image processing means for outputting R, G, B and luminance signals (Y) for main and sub picture output based on the main picture composite video signal and the hue and blanking signal output from the PIP processing means; And a CRT driving means for driving a CRT based on the R, G, B and luminance signals (Y) output from the image processing means.