KR20000037657A - Method for high speed searching text broadcasting - Google Patents

Abstract

PURPOSE: A method for high speed searching text broadcasting is provided to store the history of channels a user has selected in order to speed up the selection of text information. CONSTITUTION: A method for high speed searching text broadcasting includes five steps. At the first step, whether the history of pages is stored is determined(202). At the second step, text information signal is read and stored sequentially(204) in a vertical recursion removal time of the image signal when the history is not stored. When the history is stored(206), the pages are read and stored(214) depending on their frequencies in a predetermined parallel line interval in the vertical recursion removal time. At the third step, whether the user selects text broadcasting mode by manipulating a predetermined key(208) is determined(210). At the forth step, the corresponding page is read and displayed and the information is stored in the history when the user selects(212) the mode.

Description

A rapidity searching method of teletext information in a television

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a text information retrieval method for a television having a teletext reception function. In particular, when a text information is received, a user may store the text in a priority order and store the page. The present invention relates to a text multicast fast search method in a television, so that the desired text information can be retrieved.

In general, in teletext, text and graphics are edited into domestic or foreign news, economic industry, sports, tourism, leisure, culture and arts, life / science / women, broadcasting, securities, and special information, and then encoded and then TV programs. In addition, a digital signal is used in the form of a digital signal using a predetermined horizontal line section among the horizontal lines except for the lines used for the vertical interval test signal (VITS) and the Ghost Cancel Reference Signal (GCRS) during the vertical blanking period of the video signal between 10H and 21H. It is inserted and sent out.

On the other hand, a method of converting character information composed of characters or figures into a digital signal and superimposing them on a video signal is transmitted by a pattern method of transmitting characters or figures as pixels, and converting them into character codes or figure codes. There are a code method, a fast code rate method, and a hybrid method utilizing the advantages of a pattern method capable of transmitting a large amount of information.

While broadcasting a regular program, the broadcasting station divides various information into fields and edits them into several hundred pages like magazines, assigns page numbers to each screen, and then displays all the screens in the specified order. Since the transmission in the form of a digital signal is repeated in a fast cycle, the receiving side collects only the signals for the waste paper composition desired by the viewer among the digital signals appearing only during the vertical blanking period, and displays the desired information.

Therefore, in the regular program, the news cannot be viewed except for the news time, but the news can be viewed by selecting and displaying the page with the news at any time by receiving the text broadcast.

In order to receive such a teletext broadcast, a television must be equipped with a device (character decoder) necessary for receiving the teletext broadcast or such a device is externally connected to the television.

A television having a character multicast reception function includes a chromaticity circuit section for inputting a composite video signal including a text information signal of a composite video circuit section to output a color signal of a general television video program, and a composite video including text information signal of the composite video circuit section. A data slicer that inputs a signal, separates the character information signal in the vertical retrace period of the composite video signal, and outputs it as a coded digital character information signal, and inputs a mode selection signal of a remote control to the light receiving element to receive an amplified mode selection signal. Inputs and outputs a preamplifier, a microprocessor for processing and outputting the amplified mode selection signal of the preamplifier, a decoding function for outputting a coded digital character information signal of an input data slicer, and a mode selection signal of the microprocessor. Outputs the mode adjustment signal according to the A data processor having a control function, a CRT controller which inputs an analog character information signal of the data processor and is driven by an input signal and outputs a signal consisting of a video character information signal, horizontal and vertical synchronization signals, and a brightness adjustment signal; Inputs the mode control signal of the data processor and inputs the color difference signal RY and GY and BY of the chromaticity circuit part according to the input signal or outputs it by inputting the output signal of the monitor controller and the output signal of the switching part. There is Korean Patent Publication No. 87-9255, which consists of a CRT that displays an input signal on a screen.

In addition, a data recognition unit for outputting the recognition data according to the data and clock signal input from the data slicer, an interface unit for inputting data from the data recognition unit to provide data, clock and control signals to each part, an analog method, The SRAM (Static Timing Unit) for inputting different clock signals according to the digital television, inputting horizontal and vertical synchronization signals, and outputting corresponding signals to the data recognition unit and data inputted from the data recognition unit And a memory interface unit for storing the read data to the display unit and a signal according to horizontal and vertical synchronization signals inputted from the outside to control the display unit for outputting the color signals (R, G, B) to the output side. Television of Korean Utility Model Publication No. 91-3669, composed of a timing change part There is a multi-character broadcast system.

When the user inputs the desired character information while watching a television with the character multicasting function, the user can view the character information by configuring and displaying the character information of the corresponding page and the content as a character screen.

However, in the above-described conventional text multi-broadcasting search, text information that is sequentially applied within a capacity limit for storing text information detected in a selected channel in text mode is stored, and a desired page is searched based on a user's key operation. After searching the desired page again, if the contents of the desired page are not saved, the text information including the desired page is detected and stored again, and then the text information of the desired page is displayed. There was a problem that it takes a long time to search the page and the content of the desired text information.

Therefore, in the present invention, the page of the text information frequently searched by the user is stored by history for each channel, and the text information is searched and stored by detecting the text information in the order of the page of the text information frequently searched when switching to the text broadcasting mode. It has been sought to reduce the time to search for the desired text information at high speed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object thereof is to switch to a text broadcasting mode in a television having a text multicasting function and to search channel and page information frequently searched by a user during text broadcasting. Characterization in TV, which can increase the user's character information retrieval efficiency by detecting and storing character information in the order of pages of frequently retrieved character information with reference to the page information which has been historically searched when the character information is detected. It is to provide a broadcast fast search method.

1 is a block diagram of a television with a teletext function employed in the present invention.

2 is a flowchart illustrating a multi-text fast search process in a television according to the present invention.

<Description of the code | symbol about the principal part of drawing>

100: key input unit 110: microprocessor

120: tuner 130: image signal processing unit

140: OSD unit 150: character decoder

160: character broadcasting output unit 170: synthesis unit

180: CRT 190: voice signal processing unit

200: Speaker 210: EEPROM

In the television according to the present invention, the fast multi-text fast searching method is a method of detecting and storing text information in a television having a multi-text broadcasting function, which detects whether or not the page search frequency is historyed when the TV is turned on. And if the page retrieval frequency has not been historyed, the character information signal is read out in a predetermined horizontal line section within the vertical blanking period of the video signal and stored sequentially. Reading and storing the text information signal in a predetermined horizontal line section within the vertical blanking period of the video signal, determining whether the user has selected the text broadcasting mode by operating a predetermined key, and if the user selects a page, Read the page from the stored character information signal Ray, and stores the selected pages is characterized by yirueojim including the step of updating the history screen to the user's search frequency.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a television having a character multicasting function employed in accordance with the present invention. The key input unit 100, the microprocessor 110, the tuner 120, the image signal processing unit 130, the OSD unit ( 140, a character decoder 150, a character broadcast output unit 160, a synthesizer 170, a CRT (Cathode Ray Tube, 180), a voice signal processor 190, a speaker 200, and an EEPROM 210. do.

In this configuration, the key input unit 100 is provided with a plurality of keys for performing the operation of the television outputs a key signal corresponding to the user's key operation.

In addition, the microprocessor 110 controls the overall operation of the television based on the key signal from the key input unit 100 and the broadcasting method information stored in the EEPROM 210. In particular, the microprocessor 110 decodes the character decoder 150 in the character broadcasting mode. Character information of the character multicasting to be output is sequentially stored in the memory not shown in the character broadcasting output unit 16, and the character broadcasting output unit 160 to read and output the page corresponding to the user's request to the CRT 180. ).

In addition, the tuner 120 outputs a broadcast signal received by being tuned to a channel corresponding to the control of the microprocessor 110.

In addition, the image signal processor 130 demodulates and detects a composite video signal among applied broadcast signals, processes the composite video signal into a displayable signal, and outputs the same to the CRT 180, and also synthesizes the output of the synthesizer 170 to the video signal. Output from the CRT (180).

In addition, the OSD unit (On Screen Display) 140 is a character screen display means for outputting an OSD text signal corresponding to the control of the microprocessor 110, although not shown, by reading from the text ROM that stores the corresponding OSD text font, Controls the timing of the vertical position and outputs it with the RGB signal and the vertical blanking signal.

The character decoder 150 separates the character information signal inserted in a predetermined horizontal line section within the vertical blanking period of the composite image signal demodulated and detected by the image signal processor 130 to decode the digital character information decoded. Output to 110.

Also, the text broadcasting output unit 160 reads the text information of the corresponding text broadcasting under the control of the microprocessor 110 according to the user's text broadcasting mode selection, and synthesizes the text information signal configured as a predetermined text information screen. Output to 170.

Meanwhile, the synthesizer 170 synthesizes the outputs of the OSD unit 140 and the text broadcast output unit 160 and outputs the synthesized signals to the image signal processor 130, and the audio signal processor 190 is the image signal processor 130. The voice signal is separated from the signal applied from the signal to be output and output to the speaker 200.

A detailed description will be given with reference to the flowchart of FIG. 2 attached to a multi-text fast searching procedure according to the present invention in a television having a multi-text broadcasting function having the above-described configuration.

First, when the television is turned on from the standby state (step 200), the microprocessor 110 controls the television as a whole, while the character decoder 150 in the predetermined horizontal line section within the vertical blanking period of the broadcast signal. The inserted digital text information is detected, and the digital text information of the detected text multicast is edited and stored so that the digital text information can be output in correspondence with the search frequency of the user.

In detail, the microprocessor 110 determines whether there is historical data stored in the internal memory (step 202).

At this time, if the history data is not stored, the microprocessor 110 omits the illustration of the character broadcast output unit 160 in order of page order for transmitting the digital character information of the character broadcast applied from the character decoder 150 in order. Storage control is performed in accordance with the capacity of the memory (step 204).

On the contrary, if historical data indicating the frequency of page retrieval of the user is stored in advance, the digital character information of the character broadcast applied from the character decoder 150 may be sorted in the order of the page of the character information frequently searched by the user. The storage of the memory in the unit 160 is controlled (step 206).

Next, the user manipulates a predetermined key provided in the key input unit 100 to retrieve text information, and switches to the text broadcasting mode. In this case, the user inputs the key input unit 100 to switch to the text broadcasting mode from the general broadcasting channel. The predetermined key is operated to switch to the text broadcasting mode, and if there is a channel dedicated to text broadcasting, the channel is switched to the text broadcasting mode.

Accordingly, the microprocessor 110 determines whether a predetermined key signal is applied from the key input unit 100 to switch to the text broadcasting mode (step 208).

At this time, when a predetermined key signal for switching to the text broadcasting mode is applied from the key input unit 100, the microprocessor 110 controls the text broadcasting output unit 160 to control the switching to the text broadcasting mode (step 210).

In this case, the text broadcasting output unit 160 sequentially reads the digital text information stored in the internal memory, generates a text broadcasting signal for configuring the text information screen, and applies the text broadcasting signal to the combining unit 170. The text broadcasting signal applied to 170 is displayed on the CRT 180 through the image signal processing unit 130 so that the user can view the text information through the CRT 180.

At this time, the user performs a desired page by manipulating a predetermined key provided in the key input unit 100, and the microprocessor 110 determines whether a predetermined key operation for page selection is applied from the key input unit 100. A determination is made (step 212).

Next, when a predetermined key signal for page selection is applied from the key input unit 100, the microprocessor 110 reads and controls the character information corresponding to the selected page by controlling the character information output unit 160 ( Step 214).

At this time, since the digital text information signal stored in the memory of the text broadcasting output unit 160 is aligned and stored based on the page frequently used by the user, the user can search the text information screen sequentially without selecting the desired page. The probability of obtaining information is high, and thus the user can conveniently select a text information page.

Then, the microprocessor 110 updates the history data, which records the page selection frequency in the character information, in the selected page information and stores it in the internal memory (step 216).

As described above, according to the present invention, a character broadcasting page desired by a user is detected by detecting and storing character information in the order of a page frequently searched by a user in a TV capable of receiving character multicasting, and reading and displaying the stored character information when the character broadcasting is switched. Since information can be searched and displayed more quickly, there is an effect of maximizing the efficiency of the user's text broadcasting search.

While the invention has been shown and described with respect to particular embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention as set forth in the claims. Anyone can see it easily.

Claims (1)

A method of detecting and storing text information in a television having a text multicasting function, Detecting whether the page retrieval frequency is historyed when the television is powered on; If the page retrieval frequency is not historyed, the character information signal is read out in a predetermined horizontal line section within the vertical blanking period of the video signal and stored sequentially. If the page retrieval frequency is historyed, the character information signal is ordered in the order of high frequency page. Reading and storing at a predetermined horizontal line section within a vertical blanking period of the video signal; Determining whether the user has selected a text broadcasting mode by operating a predetermined key; And reading out the page from the stored text information signal when the user selects the page, and storing the selected page information to update and history the searching frequency of the user.