KR200262131Y1 - Teletext receiver that can switch channels in telecast mode - Google Patents

Abstract

In the character broadcast reception mode according to the present invention, the character broadcast receiver capable of switching channels has a character broadcast mode key for setting and releasing the character broadcast reception mode separately from the channel selection key so that the controller does not cancel the text broadcast reception mode. Enable channel switching in the state. As a result, the present invention provides convenience for the user since the user selects a channel after releasing the character broadcast reception mode in order to switch the channel when viewing the text broadcast, and eliminates the inconvenience of resetting the text broadcast reception mode after the channel selection is completed. do. In addition, the present invention provides an effect of enabling the user to watch the character broadcast even when the channel is switched by enabling the channel switching in the state in which the character broadcast receiving mode is set.

Description

Teletext receiver that can switch channels in telecast mode

The present invention relates to a character broadcasting receiver, and more particularly, to a character broadcasting receiver capable of switching a video channel in a character broadcasting receiving mode.

In general, a character broadcast receiver detects image information consisting of characters or figures in a vertical retrace section of a broadcast signal and restores it to a text broadcast screen, and displays the text broadcast screen as it is on a CRT or a separate video playback processor. Displayed on the CRT, synthesized with the image screen restored from. TELETEXT (TTX) that can be received through such a character broadcast receiver is useful for providing various service information such as news, business, weather forecast, stocks, entertainment, shopping, and the like.

However, the conventional character broadcast receiver does not have a separate input key for setting and releasing the character broadcast reception mode, and a channel selection key for selecting a channel of a general video, that is, a channel up-down key. key) is also used as a character broadcasting mode key, so that the character broadcasting reception mode does not operate in the channel selection mode, and the channel selection mode does not operate in the character broadcasting reception mode. Therefore, in order to switch the channel that the user in the text broadcasting area is receiving the text broadcasting, the user needs to cancel the text broadcasting reception mode, select the desired channel, and set the text broadcasting reception mode again. In addition, there is also a problem that can not watch the character broadcast when switching channels.

An object of the present invention for solving these problems is to provide a character broadcast receiver capable of channel switching in the character broadcast reception mode by providing a character broadcast mode key for setting and releasing the character broadcast reception mode separately from the channel selection key. .

1 is a block diagram showing a character broadcast receiver capable of switching channels in the character broadcast receiving mode according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: key input unit 10a: channel switching key

10b: character broadcast mode key 12: control unit

14 tuner and IF processor 16 character broadcasting information detection unit

18: video playback processor 20: synthesis unit

The character broadcast receiver of the present invention for achieving the above object, in the character broadcast receiver capable of receiving and signal processing of the text broadcasting (TTX), the channel selection key for channel selection, and setting and canceling the character broadcast receiving mode A key input unit having a character broadcasting mode key separately; And detecting / releasing character broadcast information from among broadcast signals received in response to the key input signal for setting / canceling the character broadcast reception mode as described above in response to the key input signal for channel selection described above. And a control unit for performing character broadcasting mode control.

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

Referring to FIG. 1 showing each configuration of a character broadcast receiver capable of switching channels in the character broadcast reception mode, the channel selector 10a included in the key input unit 10 controls a key input signal for selecting a channel. The character broadcast mode key 10b applies a key input signal to the controller 12 for setting or releasing the character broadcast reception mode. The control unit 12 applies the international language signal to the tuner and the IF processor 14 in response to the channel selection signal from the channel selector 10a, and sets / releases the character broadcasting reception mode from the character broadcasting mode key 10b. A character broadcast mode control signal for detecting / releasing the character broadcast information from among the broadcast signals received in response to the signal is applied to the character broadcast information detection unit 16.

The tuner provided in the tuner and the IF processor 14 tunes a broadcast signal of a channel corresponding to the pre-international language signal from the control unit 12 and converts it into an intermediate frequency (IF) signal. The IF processor amplifies and detects the IF signal supplied from the tuner and converts it into a composite video signal (CVBS). The image reproducing processor 18 divides the composite image signal from the IF processor into a luminance component signal and a color component signal, and then performs predetermined signal processing to output an RGB signal for the original image screen. The character broadcasting information detection unit 16 detects the character broadcasting information from the composite video signal IF from the IF processor according to the state of the character broadcasting mode control signal from the control unit 12, and converts the character broadcasting information into an RGB signal for the character broadcasting screen. , Do not detect and convert. The synthesizing unit 20 synthesizes and outputs the character broadcasting screen signal from the character broadcasting information detection unit 16 to the original image screen signal from the image reproducing processor 18. The CRT displays the synthesized text broadcasting screen from the combining unit 20.

Now, a method for switching channels when the user of the text broadcasting area is watching the text broadcasting will be described in detail with respect to the operation of the apparatus of FIG. 1 having the above-described arrangements.

In order to watch a character broadcast, a user first operates a channel selector 10a to apply a key input signal for selecting a desired channel, and a key input signal for setting a text broadcast reception mode by operating a text broadcast mode key 10b. Apply. The controller 12 applies a pre-international language signal for tuning the corresponding channel to the tuner in response to the key input signals from the key input unit 10, and controls the character broadcast mode for detecting the character broadcast information among the received broadcast signals. The signal is applied to the character broadcasting information detection unit 16. The tuner tunes the broadcast signal of the corresponding channel to an IF signal in response to the pre-international language signal from the control unit 12, and the IF processor amplifies and detects the IF signal and converts it into a composite video signal. The video reproducing processor 18 processes the composite video signal from the IF processor and converts it into the original video screen signal. Under the control of the control unit 12, the text broadcasting information detecting unit 16 detects text broadcasting information (information such as text and graphics) contained in the vertical retrace section of the broadcasting signal, and converts the text broadcasting information into a text broadcasting screen signal. The synthesizing unit 20 synthesizes the video screen signal and the character broadcast screen signal and outputs them to the CRT, and the CRT displays the video screen and the synthesized text broadcasting screen on the screen.

On the other hand, in the character broadcast reception mode, the user applies a key input signal for selecting a desired channel by manipulating the channel selector 10a which is distinguished from the character broadcast mode key 10b. The control unit 12 applies the international language signal to the tuner and the IF processor 14 while the text broadcasting reception mode is set. Since the following operation is easily predicted from the above-described operation description, a detailed description thereof will be omitted. As a result, the character broadcasting screen of the switched channel is displayed on the CRT when the character broadcasting reception mode is set.

As described above, the character broadcast receiver capable of channel switching in the character broadcast reception mode of the present invention has a character broadcast mode key for setting and releasing the text broadcast reception mode separately from the channel selection key. Enable channel switching without release. Thus, the present invention provides a user convenience by eliminating the inconvenience of resetting the text broadcast reception mode after the user selects a channel after releasing the text broadcast reception mode in order to switch the channel when viewing the text broadcast. do. In addition, the present invention provides an effect of enabling the user to watch the character broadcast even when the channel is switched by enabling the channel switching in the state in which the character broadcast receiving mode is set.

Claims (1)

In the TV receiver capable of receiving and processing text broadcasting (TTX), A key input unit having a channel selection key for channel selection and a character broadcasting mode key for setting and releasing the character broadcasting reception mode; And A character for performing an international language in response to the key input signal for channel selection, and for detecting / detecting character broadcast information among the broadcast signals received in response to the key input signal for setting / canceling the character broadcast reception mode. Character broadcast receiver having a control unit for performing broadcast mode control.