KR100348468B1 - Method for storing and switching channels having addition broadcasting - Google Patents

Abstract

The method for storing additional broadcasting channels according to the present invention stores channel frequencies received after performing automatic and manual channel tuning in a first group channel table, and if there is additional broadcasting information in the stored channel frequencies, the second group channel table. And storing the channel frequency in.

In the additional broadcasting channel switching method according to the present invention, after confirming the key input of the TXT mode, it is determined that the current broadcast is the TXT mode if the key is the TXT mode. Judging whether there is a signal, and if there is a TXT signal, switch to the TXT mode.If there is no TXT signal, the TXT signal is switched to the designated channel of the second group channel table, then the TXT mode is decoded, and the TXT signal is decoded. It is characterized by displaying a signal.

According to the present invention, while storing the information about the TXT in the receiving broadcast channel, while managing all the received channel and the channel having a specific broadcast out of the receiving channel divided into groups, at the same time different from the TXT mode of the current channel The switching of the channel to the TXT mode is to enable direct switching between channels without going through the RF mode.

Description

Method for storing and switching channels having addition broadcasting}

The method for storing and switching additional broadcast channels according to the present invention relates to a method for storing and switching additional broadcast channels, in which data of additional broadcast channels are stored and channel selection and direct switching between channels with additional broadcasts are possible.

The conventional additional broadcasting channel switching method is shown in Figure 1,

(a) selecting a user desired channel and switching to teletext mode;

(b) determining whether a teletext signal is present after step (a);

(c) after the step (b), if there is a teletext signal, decoding the teletext signal and displaying the decoded teletext signal on the screen;

(d) If the user requests to switch to the teletext mode of another broadcast after step (c), the current teletext mode is switched to the RF (Radio Frequency) mode and the channel is selected.

Here, in step (e), if there is no teletext signal, the process proceeds to the step of not switching to the teletext signal.

Referring to the accompanying drawings, a conventional teletext broadcasting channel switching method proceeds as follows.

First, when the automatic or manual channel storage, the microcomputer detects only the RF frequency of each channel and stores the corresponding channel data in the memory to tune the channel selected by the user with information on the broadcasting channel.

In this state, when the user selects a desired broadcast channel (S11) and switches to the teletext (TXT) mode in this state (S12), it is determined whether a TXT signal exists (S13).

If there is no TXT signal, switching to TXT broadcasting is impossible (S13-1). If there is a TXT signal, the TXT signal is decoded by the TXT decoder (Decoder) (S14), and the decoded TXT signal. Is displayed on the screen (S15).

After the step S15, if the user's key signal is selected to switch to the RF mode again, the switch to the RF mode (S16) (S17), if the TXT broadcasting of the other channel is selected to switch to the RF mode for channel selection (S16). S16-1) (S16-2), step S11 for selecting a corresponding channel is performed.

All TVs using the current electronic tuner store the frequency of the channel receiving the memory in the channel memory in the form of frequency (FS) or voltage (VS) through the microcomputer. Based on this data, you can go to the desired channel.

As described above, in the conventional method, when only automatic or manual channel storage is performed, only RF frequency of each channel is detected and stored as channel data, and the stored channel can be switched and edited. However, the channel data has information regarding the presence or absence of a TXT signal. When the consumer tries to switch the TXT mode, the TXT mode is switched after checking whether the TXT is broadcast on the currently selected broadcast channel.

However, this method is inconvenient depending on the TXT broadcast selection because the consumer has to switch to the RF mode, select the desired channel, and then switch back to the TXT mode when the consumer wants to switch from the TXT mode of a specific broadcast channel to the TXT mode of another broadcast channel. There is a problem that takes a long time.

Against this background, when the user wants to switch from TXT mode of one broadcasting channel to TXT mode of another broadcasting channel, the consumer demands an easy method of switching directly to TXT mode without going through the RF mode.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The present invention relates to storing and managing all received channels and channels having specific additional broadcasts among the received channels in order to manage additional information in broadcast channels. We assume 1 characteristic.

According to a second aspect of the present invention, the switching from the TXT mode of the current channel to the TXT mode of another channel can be directly switched between channels without going through the RF mode.

According to a third aspect of the present invention, in a TV having a PIP function to which two tuners are applied, a main picture (or sub picture) adjusts an RF broadcast mode in a main picture and a sub picture, and a sub picture (or main picture) TXT broadcast mode can be adjusted independently.

As such, the present invention enables the user to switch directly from the TXT mode of the current broadcast channel to the TXT mode of another broadcast channel without going through the RF mode, thereby simplifying the use of the user and the time required to find the desired TXT broadcast. The purpose of the method is to store and switch the additional broadcasting channel so as to shorten the time required.

1 is a flow chart showing a conventional teletext broadcast channel switching method.

2 is a block diagram showing an additional broadcasting channel switching device according to the present invention.

3 is a flow chart showing an embodiment showing a method for storing an additional broadcast channel according to the present invention.

Figure 4 is a flow chart showing a first embodiment of a method for switching additional channel according to the present invention.

5 is a view showing a second embodiment of an additional broadcast channel switching method according to the present invention;

<Description of Symbols for Main Parts of Drawings>

10 ... MICOM 20 ... Tuner part

30 ... TXT decoder unit 40 ... image processing unit (VCD unit)

50 Main Screen 60 Sub Screen

The additional broadcasting channel storage method according to the present invention for achieving the above object,

(A) performing channel tuning automatically or manually;

(B) if there is a signal at the channel frequency after step (a), storing the frequency of the channel in the first group channel table regardless of the presence or absence of a text broadcast signal;

(C) When the text broadcasting signal is included in the channel of step (b), the text broadcasting information and the corresponding channel frequency are stored together in the second group channel table.

The additional broadcasting channel switching method according to the present invention,

(a) confirming the TXT mode keystroke,

(b) determining whether the current broadcast is in the TXT mode if the TXT mode key is input, and switching to the TV mode in the TXT mode, and determining the presence or absence of the TXT signal if the TXT mode is not present.

(c) converting the TXT signal to the designated channel of the second group channel table if the TXT signal is present and switching to the TXT mode if there is no TXT signal as a result of the TXT signal determination of step (b). Wow,

(d) After the step (c), the TXT signal decoded in the TXT mode is decoded, and then the TXT signal is displayed.

(E) checking whether the TXT channel switching key input is performed if the TXT mode key input is not performed in the step (a);

(f) confirming whether the TXT channel switching key input is the current TXT mode as a result of the checking in step (e), and performing the corresponding key if the TXT channel switching key input is not performed;

(g) In step (f), if it is determined that the current TXT mode is a TXT mode, the step of decoding the up / down term TXT text signal of the corresponding channel of the second group channel table may be performed.

Hereinafter, with reference to the accompanying drawings as follows. 2 is a block diagram of an additional broadcast channel switching apparatus employed in the present invention, FIG. 3 is a flowchart showing an embodiment of a method for storing additional broadcast channels, and FIG. 4 is a first embodiment of a method for switching additional broadcast channels. 5 is a flowchart illustrating a second embodiment of a method for switching an additional broadcasting channel.

Referring to FIG. 2, a microcomputer 10 for controlling RF channel tuning and dividing and storing the channels according to the presence or absence of a text signal of the channel frequency into groups and increasing the channel frequency by the RF channel tuning signal of the microcomputer 10. The tuner unit 20 for outputting an intermediate frequency IF and the intermediate frequency tuned by the tuner unit 20 are decoded and the composite video signal CVBS is decoded to determine whether the channel signal is present. TXT decoder unit for checking the presence or absence of a TXT signal in the image processing unit (VCD, 30) and the composite video signal (CVBS) decoded by the image processing unit 30 and transmits the result to the microcomputer 10 ( 40).

The additional broadcasting channel storage and switching method configured as described above will be described with reference to the accompanying drawings.

First, referring to FIG. 2, the tuner unit 20 increases the channel frequency according to a control signal for tuning the RF channel of the microcomputer 10 during automatic or manual channel tuning, and adjusts an intermediate frequency IF for an arbitrary channel. Output to the image processor 30.

The image processor 30 decodes the composite video signal CVBS from the input intermediate frequency IF and sends the presence or absence of a signal of the channel to the microcomputer 10. At this time, if there is a signal in the channel, the microcomputer 10 stores the corresponding channel frequency in the first group table and detects whether the channel has TXT broadcasting through the TXT decoder 40 (S22) (S23).

If there is TXT broadcasting in the stored channel frequency, information on the presence of TXT broadcasting together with the frequency of the channel is stored in the second group channel table (S24), and if the TXT information is not detected in the stored channel frequency, the second group It outputs the tuning control signal to the tuner unit 20 for the next channel without storing it in the channel table.

That is, only the information on the channel frequency is stored in the channel table of the first group regardless of the presence or absence of TXT information, and the information on the channel frequency and the information on the presence of TXT broadcasting are stored together in the channel table of the second group.

On the other hand, when switching from the TXT mode of the current channel to the TXT mode of another channel, when a channel UP / DOWN key signal is input, the microcomputer 10 uses the channel table of the first group to up / down the channel. Down.

When the TXT mode switching key signal is input by the user, the microcomputer 10 transmits the switching signal to the TXT mode to the image processing unit 30 and the TXT decoder unit 40, and the image processing unit 30 transmits the TXT decoder unit 40. ), And the TXT decoder unit 40 determines whether the TXT signal is present from the composite video signal CVBS and transmits it to the microcomputer 10.

At this time, when pressing the TXT channel switching key, when the TV reception state is the TV mode, the channel is detected by using the first group channel table up / down to detect the corresponding channel and the TXT signal, and if the TV reception state is the TXT mode, Performs a function of switching to TXT mode after up / down of 2 group channels.

Accordingly, the microcomputer 10 has a channel table of a first group having frequencies and TXT presence information of all receivable channels, and a channel table of a second group having frequency and TXT presence information of a channel having a TXT signal.

According to an embodiment of the method for storing an additional broadcast channel according to the present invention for explaining this in detail, referring to FIG. 3, performing automatic / manual channel tuning (S21), and checking whether there is a signal in the tuned channel frequency (S22). If there is a signal in the channel frequency as a result of the checking, the channel frequency is stored in the first group channel table (S23).

At the same time, it is checked whether the text broadcast signal exists in the channel (S24), and as a result, if there is a text broadcast signal, the channel frequency is stored in the second group channel table (S25).

Meanwhile, a first embodiment of a broadcasting channel switching method in a TXT mode different from TXT broadcasting reception will be described with reference to FIG. 4.

First, when the user selects a channel, the microcomputer 10 selects a channel from the first group channel table and determines whether the user inputs the TXT mode key in the selected channel (S31). It is checked whether the broadcast is in the TXT mode (S32).

As a result of the checking in step S32, if the current broadcast is in the TXT mode, it is switched to the TV mode (S33). If the current broadcast is not in the TXT mode, it is determined whether there is a TXT signal (S34). As a result of the determination in step S34, if there is a TXT signal, switching to the TXT mode is performed (S35). If the TXT mode is switched, the TXT signal is decoded by the TXT decoder unit 40 (S36), and the decoded TXT signal is displayed. (S37).

In detail, when the user selects a channel, the microcomputer 10 selects a pre-stored channel from the channel table of the first group to switch to the RF mode and up / down the RF channel to select a desired channel. At this time, if the user has a TXT mode key input, if there is no TXT signal, the user switches to the designated channel of the second group channel table, switches to the TXT mode, and detects the TXT signal by the TXT decoder 40 to display on the screen. .

If it is not the TXT mode key input in step S31 and the TXT channel switching key input (S38), it is checked whether the present TXT mode is present (S39). After down (S40), step S36 of decoding the TXT signal of the channel is performed.

If there is no TXT signal in step S34, switching to the channel designated in the second group channel table is performed, and then step S35 of switching to the TXT mode of the designated channel is performed (S34-1). In addition, if the TXT channel switching key is not input in step S38, the corresponding key command is performed (S38-1).

In detail, if the user wants to search TXT of another page (the amount of text information that can be displayed on one screen at a time) on the same channel, the user inputs a channel up / down key as before, and the user inputs another channel. If you want to search for TXT broadcasting, press TXT broadcasting channel switching key (channel up / down key, numeric key) in TXT mode, and Microcom will switch to TXT broadcasting channel you want by using the second group channel table. Display it.

On the other hand, Figure 5 is a second embodiment of the additional broadcasting channel switching method of the present invention,

Since the main picture 50 and the sub picture 60 receive broadcasts through different tuners in a TV having a 2-tuner picture in picture (PIP) function, the main picture 50 uses a channel table of the first group. By controlling the channel, the sub screen 60 controls the channel using the second group channel table, thereby effectively controlling the text broadcasting of the sub screen while displaying the RF screen on the main screen and the text screen on the sub screen.

On the contrary, the main screen can control the TXT screen and the sub screen can be controlled by the RF broadcast, thereby effectively controlling the TXT broadcast.

As described above, the present invention utilizes a separate channel storage table for arranging other special purpose channels by storing and managing a channel storage table by separating and storing additional channels of a specific purpose among all received channels and the received channels. There is an effect that it is possible to search for a special purpose reception broadcast channel more convenient.

As described above, the present invention stores the TXT information together in the channel data, so that the editing and processing of the channel with the TXT broadcast is convenient and the TXT broadcast can be effectively used by the user, and also different from the TXT of the current broadcast. When you want to watch the TXT of the broadcast can be switched directly without going through the RF mode, you can search TXT broadcast more conveniently and quickly.

In addition, the present invention is to adjust the TXT mode to one screen (main or sub) of the main screen and the sub-screen in the TV having a PIP function to apply two tuners and to perform the RF mode adjustment to the other screen, respectively Independent channel adjustment is possible.

The present invention utilizes a channel storage table to separately manage all received channels and additional broadcast channels for a specific purpose among the received channels, thereby utilizing a separate channel storage table for channel alignment for other special purposes, and for the special purpose required by the user. There is an effect that can more conveniently search the received broadcast channel of.

Claims (6)

Tuning the channel, Storing the frequency of the channel in the first group channel table regardless of the presence or absence of a text broadcast signal if there is a signal at the channel frequency when the channel is tuned; And storing the broadcast information and the corresponding channel frequency together in the second group channel table when the text broadcast signal is included in the channel stored in the first group channel table. The method of claim 1, wherein the frequencies of all channels are stored in the first group channel table regardless of the presence or absence of a teletext broadcasting signal channel, and the teletext broadcasting information is stored in the second group channel table together with the corresponding channel frequencies. The additional broadcasting channel storage method characterized in that. (a) checking the key input of the TXT mode; (b) determining whether the current broadcast is in the TXT mode if the key is in the TXT mode, switching to the TV mode in the TXT mode, and determining the presence or absence of the TXT signal if the TXT mode is not present; (c) converting the TXT signal to the designated channel of the second group channel table if the TXT signal is present and switching to the TXT mode if the TXT signal is present; and (d) decoding the TXT signal switched to the TXT mode after step (c) and then displaying the TXT signal. The method of claim 3, wherein If it is determined that the TXT mode switching key input is not the TXT mode key input in step (a), it is checked whether the present TXT mode is used. If the TXT mode is checked, the corresponding channel of the second group channel table is decoded to decode the TXT signal. And displaying the decoded TXT signal. The method of claim 3, wherein The first group channel table stores the frequencies of all channels regardless of the presence or absence of the TXT broadcast signal channel, and the second group channel table stores the TXT broadcast information together with the channel frequency. Way. In the TV with the multi-screen function using 2 tuners, One screen controls the channel using the first group channel table storing the channel frequency regardless of the presence of the text broadcasting signal, and the other screen uses the second group channel table storing the channel frequency including the text broadcasting signal. And controlling the channel to adjust the two screens independently.