KR19980077282A - Teletext Information Display Control Device - Google Patents

Abstract

The present invention relates to a teletext information display control apparatus, and includes a teletext signal extractor (24) for extracting only a teletext signal from a composite video signal, and a teletext provided by processing the extracted teletext signal in line units. A signal processing section 26, a page memory section 30 having a plurality of page memories 30a-30n for storing the teletext signal in units of pages, and setting a display mode of all / change parts of the teletext signal only; A mode setting button 20a of the remote controller 20 to control the CPU 22 and the CPU 22 for controlling the display state of only the entire / modified portion of the teletext information in response to the display mode of the teletext information. And an information code judging unit 32, which executes the judgment of only the whole / modified portion of the teletext information under the control of the teletext signal so that the teletext signal is processed by teletext image output In this way, it is possible to selectively display the overall teletext information of a specific page amount or the teletext information of only a part changed within a unit time.

Description

Teletext Information Display Control Device

The present invention relates to a teletext information display control apparatus, and more particularly, to a teletext information display control apparatus for displaying only teletext information newly changed and received on a television having a teletext information receiving function. .

Currently, broadcasting stations are performing character multicasting to collect, process, edit, and transmit various pieces of information provided from a plurality of information servers, and transmit them as so-called 'teletext signals'. For example, various information including 'stock', 'travel' and 'shopping' information is coded and transmitted at a predetermined position of a broadcast video signal (usually a blanking period of a video). By decoding the code data of the teletext information to be displayed on the CRT apparatus, it is provided to the viewer as text information.

1 is a block diagram of a television having a teletext signal reception function according to a conventional example. In FIG. 1, reference numeral 1 denotes an antenna for receiving a broadcast signal transmitted over the air from a broadcasting station, and 2 denotes an antenna ( 1 shows a receiving circuit section which takes a composite video signal of a base band from the broadcast signal received through 1), and the composite video signal from the receiving circuit section 2 is a video color signal processing section 3 and a teletext signal receiving section ( 4) and the synchronizing separator 8 at the same time.

The image color signal processor 3 demodulates a composite video signal to provide a basic color signal (R / G / B), and the teletext signal receiver 4 includes a teletext superimposed on the composite video signal. A signal is taken and the teletext signal is converted into an R / G / B signal. The television video signal from the video color signal processing section 3 and the teletext signal from the teletext signal receiving section 4 are applied to the switching section 5 by the switching means 5 and to the switching section 5. The television video signal or teletext signal is thereby selected and applied to the video output section 6 and displayed on the CRT apparatus 7. The switching unit 5 is switched between the television video signal and the teletext signal by a control signal applied from the control unit 11.

Then, the horizontal synchronizing signal and the vertical synchronizing signal separated by the synchronizing separator 8 are applied to the horizontal deflection circuit 9 and the vertical deflection circuit 10 so that the television video signal or the teletext signal is transmitted to the CRT apparatus. The deflection action is performed to display normally.

By the way, in the case of a television having the conventional teletext signal receiving function shown in FIG. 1, when the switching unit 5 is switched to the teletext signal receiving unit 4 under the control of the control unit 11, the receiving circuit unit 2 The teletext signal provided from the C1 is displayed on the CRT apparatus 7 through the image output section 6, so that the teletext information transmitted from the broadcasting station usually has new information prior to the change of the overall information. In many cases, the teletext information is updated and edited. However, in the configuration shown in FIG. 1, the preceding teletext information and the current updated changed information are displayed in a mixed state. Therefore, there is a disadvantage in that the viewer easily recognizes the updated information among the teletext signals displayed on the CRT apparatus 7.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and is intended to display only the newly updated information portion of the teletext information displayed on the CRT apparatus so that the viewer can easily recognize the new teletext information. It is an object of the present invention to provide a text information display control device.

In order to achieve the above object, according to a preferred embodiment of the present invention, in a television having a teletext signal reception function for selectively displaying teletext information included in a composite video signal and transmitted on a CRT device, the composite video signal A teletext signal extracting unit for extracting only a teletext signal from a signal, a teletext signal processing unit for providing the extracted teletext signal in parallel in units of lines, and a plurality of page memories for storing the teletext signal in units of pages; Equipped page memory section, a mode setting button of a remote controller for setting a display mode of only the whole / change part for the teletext signal, only a whole / change part of the teletext information in response to the display mode of the teletext information CPU for controlling a display state, and the teletext information under the control of the CPU There is provided a teletext information display control apparatus including an information code determination for executing the determination of all / changing parts only so that the teletext signal is teletext image processed and output.

According to the teletext information display control apparatus according to the present invention having the above-described configuration, only the contents of the newly updated and converted teletext information on the CRT apparatus are compared with the previous teletext information stored in the page memory and the current teletext information. As displayed in the highlighted state, the viewer can be newly updated and converted to identify the received teletext information.

1 is a schematic block diagram of a television having a teletext receiving function according to a conventional example;

2 is a block diagram of a teletext information display control apparatus according to a preferred embodiment of the present invention;

3 is a diagram showing a teletext information display state on a CRT apparatus by the teletext information display control apparatus according to the present invention.

* Description of the symbols for the main parts of the drawings *

20: remote control, 20a: mode setting button,

22: CPU, 24: teletext data extraction unit,

26: teletext signal processor, 28: program memory,

30: page memory section, 30a-30n: page memory section,

32: information code judgment, 34: teletext image processing unit,

36: Teletext information output section.

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

FIG. 2 is a block diagram showing a teletext information display control apparatus according to the present invention applicable to the teletext signal receiver 4 shown in FIG. 1. Reference numeral 20 denotes a remote controller for selecting playback processing of teletext information. The remote controller 20 is provided with a mode setting button 20a for controlling the entire screen or only the changed part of the teletext information to be displayed on the screen. 22 denotes a CPU for controlling the reception of the teletext information set by the mode setting button 20a of the remote controller 20 and the display of all or changed portions of the received teletext information. 1 shows a teletext data extraction unit for extracting only teletext data from the composite image signal CV received through the reception circuit unit ('2' in FIG. 1), and 26 denotes a composite video signal for the teletext data extraction unit 24. In addition to providing a sampling signal (SMP) applicable to the case of extracting teletext data from the CV, a serial signal receiving a teletext data and a clock signal provided from the teletext data extraction section 24 and being transmitted to a specific channel is provided. Teletext data is processed in parallel in units of pages required for screen composition, stored in lines, and applied to subsequent playback processes. The processing part is shown.

Also, 28 is applied to the selection of the character code and the teletext information applied to the interpretation of the teletext code data transmitted in the vertical retrace period of the composite image signal CV when the screen display of the teletext information is selected. A program memory in which program data for displaying the table of contents information is recorded is shown. The program memory 28 includes a table of contents information recording area 28a and a character code recording area 28b.

30 is a page memory unit for storing the teletext information processed in units of pages in the teletext signal processor 26, and the page memory unit 30 includes a plurality of page memories (where teletext information is stored in units of pages). 30a-30n). Further, 32 denotes page memories 30a-30n of the page memory section 30 under the control of the CPU 22 when the display of only the changed portion is designated by the mode setting button 20a of the remote controller 20. An information code judgment for comparing only the preceding teletext data TXT1 stored in a specific page memory with the code data of the current teletext data TXT2 processed by the teletext signal processor 26 to determine only the changed part. Represents wealth. That is, the information code judging unit 32 controls from the CPU 22 in accordance with a state in which the display of the teletext information of all or changed portions is selected by the mode setting button 20a of the remote controller 20. When activation is controlled based on the signal SW and the display of the entire teletext information is set, the teletext signal processing unit 26 processes the specific page (that is, the viewer) stored in the specific page memory of the page memory unit 30. While bypassing the entire teletext data TXT2 of the page corresponding to the table of contents information of the channel selected by the video signal, the display of the teletext information of the changed portion is set by the mode setting button 20a. Is changed, the code is compared between the preceding teletext information TXT1 and the current teletext information TXT2 read out from the specific page memory. Determined by, and outputs the code data of only the changed portion.

Further, 34 denotes a tele-process for image-processing the teletext data of all or part of the information provided from the information code determination unit 32 according to the character code provided in the character code recording area 28b of the program memory 28. 36 denotes a text image processing unit, and 36 denotes a CRT apparatus ('7 in FIG. 1) through which the image signal R / G / B processed by the teletext image processing unit 34 is transferred through the image output unit (' 6 'in FIG. 1). Represents a teletext information output unit to be output as').

Next, the operation of the teletext information display control apparatus according to the present invention having the above-described configuration will be described with reference to the screen display examples shown in FIGS. 3A and 3B.

First, when the teletext mode is selected by the TV / TXT (teletext) mode setting button (not shown) of the remote controller 20, the CPU 22 enters the contents information area 28a of the program memory 28. The data related to the table of contents is controlled to be applied to the teletext image processing unit 34. Accordingly, the table of contents signal processed by the teletext image processing unit 34 as the image signal R / G / B is the teletext information. The output unit 36 displays the CRT device ('7' in FIG. 1).

When the viewer selects a specific table of contents based on the display, the CPU 22 displays a state in which the display of the entire teletext information or the display of only the changed part is set by the mode setting button 20a of the remote controller 20. If it is determined that the display of the entire teletex information is selected, the CPU 22 applies a switching signal SW to the information code determination unit 32 so that the entire teletext information of the selected table of contents is image-processed and output. Will be set.

And even when the teletext mode is set or the teletext mode is not set, the teletext data extractor 24 synchronizes the composite image with the sampling signal SMP applied from the teletext signal processor 26. Only the teletext data transmitted in the vertical retrace period of the signal CV is extracted and applied to the teletext signal processor 26 along with a clock signal. The teletext signal processor 26 transmits the teletext data in line units. Parallel processing is performed to store the corresponding page memory among the page memories 30a to 30n of the page memory unit 30.

In this state, when the table of contents information of the remote controller 20 is selected, the teletext information of the page corresponding to the selected table of contents bypasses the information code determiner 32 and the teletext image processing unit 34. Is applied to the video signal of the R / G / B signal based on the character code from the program memory 28, and the video signal is transmitted to the CRT apparatus (FIG. 1) through the teletext information output unit 36. To '7'). Therefore, when the display of the overall teletext information is set by the remote controller 20, the overall teletext information is displayed on the screen (38 in FIG. 3) of the CRT apparatus 7.

Here, when '38a' and '38b' of the screen 38 of the CRT apparatus are changed portions compared to the preceding teletext information, that is, the teletext information previously stored in a specific page memory of the page memory 38. In the current unit time (the unit time is set to the reference value for the CPU 22 or can be set by the viewer on the remote control 20 can be changed by the viewer), the remote controller 20 of the When the display mode of only the change portion is set by the mode setting button 20a, the CPU 22 applies the switching signal SW to the information code determining unit 32 to activate the information code determining unit 32. As a result, the information code determination unit 32 reads out the preceding teletext data TXT1 corresponding to the page selected by the viewer from the corresponding page memory of the page memory unit 30 and is presently present. Determining a modified teletext information ( '38a' and '38b' of the example Fig. 3 (a)) as compared to the teletext information (that is, the teletext information is received in a unit time) code, it is to me.

Upon completion of the determination on a line basis or page basis for the change information, the information code determination unit 32 applies the teletext data of only the change portion to the teletext image processing unit 34, and the teletext image processing unit. At 34, the teletext data of only the changed portion is processed as an image signal and applied to the teletext information output unit 36. Accordingly, the changed portion of the changed portion is displayed on the screen of the CRT apparatus (38 in FIG. 3). Only teletext information is displayed (see Fig. 3 (b)).

As described above, according to the teletext information display control apparatus according to the present invention, in response to a viewer's request, only the entire teletext information or the teletext information of the changed portion within a unit time can be selectively displayed on the screen of the CRT apparatus. As a result, the identification of the changed part of the teletext information is further facilitated, thereby improving the information transmission effect to the viewer.

Claims (3)

In a television capable of receiving and reproducing a teletext signal included in a composite video signal, A teletext signal extraction unit 24 for extracting only a teletext signal from the composite video signal; A teletext signal processor 26 for providing the extracted teletext signals in line units in parallel; A page memory section 30 having a plurality of page memories 30a-30n for storing the teletext signal in page units; A mode setting button 20a of the remote controller 20 for setting a display mode of all / change parts of the teletext signal; A CPU 22 for controlling the display state of all / changed portions of the teletext information in response to the display mode of the teletext information; And an information code judging unit 32 which executes the judgment of all / changed parts of the teletext information only under the control of the CPU 22 so that the teletext signal is processed by teletext image output. Teletext information display control device. 2. The teletext information display control apparatus according to claim 1, wherein the reference of the information code determination by the information code determination in the state in which the display of the teletext signal of the changed portion is set is a page unit or a line unit. The telecode information according to claim 1 or 2, wherein the information code determination unit (32) is configured to execute determination on a portion changed within a reference time unit or a variable settable unit time for the preceding teletext information. Text information display control device.