KR20000034598A - Method for controlling osd for television with teletext capability - Google Patents

Abstract

PURPOSE: A method for controlling OSD(On Screen Display) for a television with teletext capability is provided to display the text information of the corresponding teletext broadcasting and the OSD text at a time, and to give the OSD text the priority. CONSTITUTION: A method for controlling OSD(On Screen Display) for a television with teletext capability includes first thru forth steps. At the first step, whether a teletext broadcasting mode is selected is determined. At the second step, whether an OSD display is required during the teletext broadcasting mode is determined. At the third step, the text information of the teletext broadcasting is displayed unless the require for the OSD display occurs. At the forth step, the text information of the corresponding teletext broadcasting and the OSD text is displayed at a time when the OSD display is required.

Description

A controlling method of OSD in a television with teletext decoder

The present invention relates to a method of controlling an On Screen Display (OSD) in a television having a teletext reception function. Specifically, an OSD string is generated when an OSD output request is received while receiving a teletext broadcast. The present invention relates to an OSD control method for synthesizing the received text information and outputting the synthesized text information, and synthesizing the OSD text prior to the overlapping of the text information output area and the OSD text output area.

Teletext is a text or graphic image of domestic and international news, economic industry, sports, tourism, leisure, culture and arts, life / science / women, broadcasting, securities, and special information. It refers to the transmission of digital signal by using 4H on the line except for the line used for VITS (Vertical Interval Test Signal) and GCRS (Ghost Cancel Reference Signal) during the 10H ~ 21H period.

As a method of converting image information composed of characters or figures into a digital signal and superimposing them on the image signal, a pattern method of transmitting characters or figures as pixels and a code of converting characters and figures into characters or figures code), a fast transmission 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 a desired page configuration among the digital signals appearing only in the vertical retrace period, and displays the desired information.

Therefore, you can not see the news except the news time with the regular program, but you can see the news by selecting the page with the news at any time by receiving a text broadcast.

In order to receive such a character multicast, a television must be equipped with a device (character decoder) necessary for receiving a character multicast, or such a device must be connected to the television from the outside.

A television having a character multi-broadcast reception function includes a chromaticity circuit section for inputting a composite video signal including a text information signal of a composite video circuit section and outputting a color signal of a general television video program, and a composite video including text information signal of a composite video circuit section. A data slicer that inputs a signal to separate 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 the preamplifier, the microprocessor for processing and outputting the amplified mode selection signal of the preamplifier, the decoding function for outputting the coded digital character information signal of the input data slicer, and the mode selection signal of the microprocessor. It has a control function to output the mode adjustment signal according to the received signal. Is a data processor, a CRT controller which is driven by an input signal by inputting an analog character information signal of the data processor and outputs a signal consisting of a video character information signal, a horizontal and vertical synchronization signal, and a brightness adjustment signal, and a mode of the data processor. Inputs an adjustment signal and outputs the color difference signal RY and GY and BY of the chromatic circuit part according to the input signal, or a switching part for inputting and outputting the output signal of the monitor controller, and an output signal of the switching part and inputting the input signal. There is Korean Patent Publication No. 87-9255, which consists of a CRT displayed on a screen.

A data recognition unit for outputting recognition data according to data and a clock signal inputted from a teletext data slicer, an interface unit for inputting data from the data recognition unit to provide data, clock and control signals to each unit, and an analog system; The input signal is inputted to the clock, the horizontal timing signal and the vertical synchronization signal are output to the data recognition part. The memory interface unit which stores the data in the static RAM and outputs the read data to the display unit, and controls the display unit which outputs the color signal (R, G, B) to the output side according to the horizontal and vertical synchronization signals input from the outside. Tel of Korean Utility Model Publication No. 91-3669 composed of a timing change section There are teletext system vision.

If the user controls the operation of the television while watching the TV having the character multicasting function, the OSD character outputs the control status when receiving a general broadcast, but outputs the OSD character when the character multicast is received. It does not, which is an inconvenience that the viewer can not know the control situation.

Accordingly, the present invention seeks to find a way to respond to the OSD text output request even during text broadcasting reception.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and when a character with OSD text output request is generated during character broadcasting in a TV having a character multicasting function, the character information of the corresponding character broadcasting and the OSD character are synthesized. The present invention provides an OSD control method for outputting a composite image by synthesizing the OSD characters in priority when the output regions of two characters overlap.

1 is a block diagram illustrating a television having a text multicast function adopted in the present invention.

2 is a flowchart illustrating an OSD output process in a text multicast mode according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

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 order to achieve the above object, the OSD control method of the present invention includes a process of determining whether the user selects a text multicast mode, a process of determining whether there is an OSD output request while viewing a text broadcast, and a text broadcast if there is no OSD output request. Outputting the character information of the text, and if there is an OSD output request, combining the text information and the OSD text and outputting the text information and the OSD text if the output area of the text overlaps. OSD character output in the text multi-broadcast mode.

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, a key input unit 100, a microprocessor 110, a tuner 120, a video signal processing unit 130, an 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 to output a key signal corresponding to the key operation of the user.

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 to be output by the character decoder 150. The character broadcasting output unit 160 is controlled to output the character information of the multicast to the CRT 160 when the user requests it.

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

The video signal processor 130 demodulates and detects a composite video signal among the applied broadcast signals, processes the composite video signal into a displayable signal, and outputs the same to the CRT 180. 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, a text ROM for storing and exporting the OSD text font, OSD text A ROM for storing a program for display control, a RAM for operating a program for OSD character display control, a timing section for timing horizontal / vertical positions of the OSD, an OSD character size conversion from the microprocessor 40, and The display generator is configured to display and control an OSD character based on a control signal for selecting an OSD character type to output an RGB signal and a vertical blanking signal for displaying the corresponding character.

The character decoder 150 separates the character information signal in the vertical retrace period of the composite image signal demodulated and detected by the image signal processor 130 and outputs the decoded digital character information to the microprocessor 110.

The text broadcasting output unit 160 outputs the text information of the corresponding text broadcasting to the synthesis unit 170 under the control of the microprocessor 110 according to the user's text broadcasting mode selection.

The synthesizing unit 170 synthesizes the outputs of the OSD unit 140 and the character broadcasting output unit 160 and outputs the synthesized signals to the image signal processing unit 130. In this case, the synthesizer 170 synthesizes the OSD text and prioritizes the OSD text if there are overlapping portions when synthesizing the broadcast text received in the text multicast.

On the other hand, the audio signal processing unit 190 separates the audio signal from the signal applied from the image signal processing unit 130 and processes it as a signal that can be output and outputs to the speaker 200.

With reference to the flowchart of Fig. 2 attached to the OSD control process according to the present invention in a television having a character multicasting function having the above-described configuration.

When the television is turned on from the standby state, the microprocessor 110 controls the television as a whole, and edits the digital character information of the character multi-broadcast output by the character decoder 150 to be output by the user's request. Save it.

In addition, in order to control the OSD output in the case of selecting the text multi-broadcasting mode, the viewer first determines whether the text multi-broadcasting mode is selected by operating the key input unit 100 (S100).

If it is determined in step S100 that text multicasting is selected, it is determined whether an OSD output is necessary (S110).

That is, in response to the user inputting a key for controlling the operation of the television, it is determined whether the OSD output is required to inform the control status of the selected television operation.

If it is determined that the OSD output is not necessary, the microprocessor 110 outputs a control signal to the character broadcasting output unit 160 so that the character information of the character broadcasting selected by the user is output. Control 170 (S120).

However, if the OSD output is necessary as a result of the determination of step S110, it is determined whether the text information overlaps with the OSD (S130). If not, the OSD information and the text information of the text broadcasting are synthesized and output (S140). The overlapping parts are prioritized by synthesizing the OSD output and output (S150).

Thus, when the user receives the text broadcast and controls the operation of the television, the user can recognize the control situation through the OSD text.

As described above, according to the present invention, when the OSD output request occurs in the text multi-broadcasting mode, the text information and the OSD output of the text broadcasting is synthesized and output, and the OSD when the text information and the OSD output region overlaps Even when viewing text broadcasting by giving priority to output, it is possible to provide convenience by allowing the user to recognize the situation when controlling the operation of the television.

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 (2)

In a television with a text multicast function, A first step of judging whether the text multicast mode is selected, a second step of judging whether there is an OSD output request while watching a text broadcasting, a third step of outputting text information of text broadcasting if there is no OSD output request, and an OSD And a fourth step of synthesizing the broadcast text and the OSD text when there is an output request. The method of claim 1, The fourth step is the OSD control method, characterized in that the OSD text prioritized and synthesized when the character information of the text broadcasting and the output area of the OSD overlaps.