KR20060005499A - Display language switching method of broadcast receiving system - Google Patents

Abstract

The present invention is to switch the display language of the voice multi-broadcast display, for this purpose, the present invention, unlike the conventional method that does not display the corresponding language immediately due to the complicated process of determining the transmission method, voice multi-broadcasting When receiving the voice multiple broadcast in the receiving broadcast receiving system, if there is a key input for displaying the language of the voice multiple broadcast, the transmission method is checked through the audio signal of the received voice multiple broadcast, and the corresponding language corresponding to the transmission method is selected. When switching to display by OSD method or changing channel while playing voice broadcasting, by switching the language corresponding to the transmission method of voice broadcasting received through the changed channel to display by OSD, receiving voice broadcasting In a broadcast receiving system By automatically switching the display language, depending on how you will be instantly displayed.

Description

Display language switching method of broadcast reception system {METHOD FOR SELECTING DISPLAY LANGUAGE OF THE BROADCASTING RECEIVING SYSTEM}

1 is a block diagram of a broadcast receiving system suitable for switching and displaying a corresponding language corresponding to a transmission scheme of a voice multiple broadcast according to the present invention;

FIG. 2 is a flowchart illustrating a process of switching and displaying a language corresponding to a transmission scheme of a voice multiple broadcast received in a broadcast receiving system for receiving a voice multiple broadcast according to the present invention.

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

102 control unit 104 tuner unit

106: decoding unit 108: OSD unit

110: broadcast signal processing unit

The present invention relates to a display language switching method of a broadcast receiving system, and more particularly, to a display language switching of a broadcast receiving system suitable for switching and displaying a corresponding language corresponding to a transmission method in a broadcast receiving system receiving a voice multiplexing broadcast. It is about a method.

As is well known, voice multiple broadcast is a broadcast that allows stereo broadcasting or bilingual broadcasting by simultaneously superimposing other voice signals on a voice carrier of a broadcast signal. Here, the broadcasting method for the voice signal is different for each country. The Americas adopts the Zenith method, which is an AM-FM method for AM-modulating a sub-channel in subcarriers, and in Korea and Europe, for the additional voice channel. A dual carrier (Dual-Carrier) method using a separate carrier is adopted.

Here, the AM-FM method Zenith method is adopted in the Americas, such as the United States, in the stereo method 2fH (for example, fH 15.7342KHz) is the second voice carrier, fH is a pilot signal (that is, voice Signal for determining whether the signal is multi-broadcasted), while in two-language broadcasts, a second voice carrier 5fH called SAP (Second Audio Program) is mixed with the first voice carrier and FM modulation is performed at 4.5 MHz. Will be sent.

In addition, the dual carrier method, which is a TV voice multiplexing method adopted in Korea and Europe, is 4.5 MHz for the first voice carrier and 4.72 MHz for the second voice carrier to minimize mutual interference between video and audio signals. FM modulation is transmitted. Here, the signal of the first voice carrier is used as a native language and the signal of the second voice carrier is used as a foreign language, and the pilot signal is AM-modulated and transmitted together with the carrier. For example, in the domestic broadcasting system, the pilot signal frequency indicating the broadcasting system transmits a pilot signal of 149.8 Hz for stereo broadcasting and 276 Hz for bilingual broadcasting.                         

On the other hand, NTSC transmission method uses FS (Frequency Synchronizing) method to tune and receive broadcast signal, which is AFT (Automatic Fine Tuning) voltage to tune the tuner of the receiver to the carrier frequency of each channel. It adopts the way to use. That is, after storing PLL (Phase Lock Loop) data for tuning the frequency of each channel in a memory inside the control unit of the broadcast receiving system, a user inputs a specific channel through a key input or the like. When selected, the control unit applies the PLL data of the selected channel to the tuner. The PLL is formed in the tuner to control the oscillation frequency of the voltage controlled oscillator according to the PLL data, thereby receiving the frequency signal of the channel selected by the user.

In addition, a method of displaying a corresponding language in a broadcast receiving system for receiving a voice multiple broadcast may include storing and storing a special character code of a multilingual receivable, and detecting code data for identification of a language included in the text multiple signal. (On Screen Display) There is a method of displaying an OSD character according to the determined language by determining the priority of a language for display. Alternatively, the scanning line in the sync section is counted by detecting the video sync signal. If the line is 525, it is determined by the dual carrier method of NTSC. There is a method of determining the presence or absence of the NTSC AM-FM method and then displaying the corresponding character in the memory table by the OSD method.

However, in the related art, a broadcast receiving system receiving a voice multiple broadcast performs a complicated process for displaying a corresponding language according to a transmission method to determine a transmission method, and displays the corresponding language corresponding to the transmission method using an OSD method. In the broadcast receiving system for receiving voice multiple broadcasts, there is a problem in that the corresponding language corresponding to the transmission method is not immediately displayed.

Accordingly, the present invention is to solve the above-mentioned problems of the prior art, it is possible to automatically switch the language corresponding to the transmission method of the broadcast signal received in the broadcast receiving system for receiving voice multiple broadcasts to display immediately It is an object of the present invention to provide a display language switching method of a broadcast receiving system.

In order to achieve the above object, the present invention provides a method for switching a display language in a broadcast receiving system for receiving voice multiple broadcasts, comprising: determining whether a voice multiple broadcast is received and a key input for displaying the language of the voice multiple broadcast is present; And a process of checking a transmission method through an audio signal of the received voice multiple broadcast, and switching the corresponding language corresponding to the transmission method together with the voice multiple broadcast to display the OSD in an OSD method. Provides a display language switching method of the system.

The above and other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present 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.

The present invention is different from the conventional method in which a process of determining a transmission method is complicated and thus does not display a corresponding language immediately, when a voice multiple broadcast is received in a broadcast receiving system that receives a voice multiple broadcast. If there is a key input that displays, the transmission method is checked through the audio signal of the received voice multiple broadcast, the corresponding language corresponding to the transmission method is displayed by the OSD method or the channel is changed while playing the voice multiple broadcast. In this case, by switching the corresponding language corresponding to the transmission scheme of the voice multiple broadcast received through the changed channel and displaying the same by the OSD method, it is easy to achieve the object of the present invention through such technical means.

FIG. 1 is a block diagram of a broadcast receiving system suitable for switching and displaying a language corresponding to a transmission scheme of a voice multiple broadcast received according to the present invention. The control unit 102, the tuner unit 104, and the decoding unit 106 are shown in FIG. ), An OSD unit 108 and a broadcast signal processing unit 110.

Referring to FIG. 1, the controller 102 controls an overall operation of a broadcast receiving system including a microprocessor, for example, to receive a voice multiple broadcast. The tuner unit 104 controls a control signal for tuning the voice multiple broadcast. ) And a control signal for decoding the tuned broadcast signal to the decoding unit 106. In addition, OSD control signal for generating an OSD that displays the corresponding language corresponding to the information of the transmission method (for example, NTSC dual carrier system, NTSC AM-FM system, etc.) provided from the decoding unit 106 The control unit 108 transmits the video signal of the decoded broadcast signal and the OSD of the corresponding language to be displayed to the broadcast signal processor 110.

The tuner 104 tunes any one of a plurality of broadcast channels received through an antenna in response to a tuning control signal provided from the controller 102. After the conversion to the intermediate frequency, demodulation and error correction, the transmission stream is restored. That is, the voice multiplexing is tuned and the video and audio signals reconstructed in the transport stream are transmitted to the decoding unit 106.

In addition, the decoding unit 106 converts the compressed coded broadcast signal (broadcast program signal) of a specific channel into the original signal before encoding by using a decoding technique such as variable length decoding, inverse DCT, inverse quantization, motion compensation, or the like. The signal is recovered and transmitted to the broadcast signal processor 110. In this case, the decoding unit 106 extracts information on the transmission method of the broadcast signal (for example, SAP broadcasting of AM-FM system, voice multiple broadcasting of dual carrier system, etc.) and delivers the information to the control unit 102.

Next, the OSD unit 108 corresponds to a transmission method (for example, a dual carrier type of NTSC, an AM-FM method of NTSC, etc.) corresponding to a control signal provided from the control unit 102, Korean and English. An OSD that displays a back light is generated and transmitted to the broadcast signal processor 110.

Meanwhile, the broadcast signal processor 110 mixes the video signal of the decoded broadcast signal and the OSD of the generated language according to a control signal provided from the controller 102, and displays the OSD through a monitor (not shown). The audio signal of the signal is output through a speaker (not shown).

Next, after checking the transmission scheme of the voice multiplexing broadcast received in the broadcast reception system having the above-described configuration, a process of automatically switching the corresponding language corresponding to the transmission scheme and displaying the OSD will be described. .

FIG. 2 is a flowchart illustrating a process of switching and displaying a language corresponding to a transmission scheme of a voice multiple broadcast received in a broadcast reception system for receiving a voice multiple broadcast according to the present invention.

Referring to FIG. 2, in a standby mode of a broadcast receiving system for receiving voice multiple broadcasts (step 202), the control unit 102 uses a user's input unit (not shown), for example, a remote controller or the like. It is checked if there is a key input for playback (step 204).

As a result of the check in the step 204, when there is a key input for reproducing the voice multiple broadcast, the tuner unit 104 tunes the received voice multicast according to the control signal provided from the control unit 102 to decode the unit 106. And reproduces the voice multiple broadcast through the broadcast signal processing unit 110 (step 206).

During playback of the voice multiple broadcast, the control unit 102 checks whether the user has a key input for displaying the language of the voice multi broadcast which is reproduced using an input unit (not shown), for example, a remote controller. 208).                     

As a result of the check in the step 208, when there is a key input to be displayed, the control unit 102 transmits information on the transmission method of the voice multi-broadcast audio signal provided from the decoding unit 106 (for example, the AM-FM method). In step 210, a transmission method of voice multiple broadcasting is determined according to SAP broadcast, dual carrier voice multiplexing, etc.).

Next, the control unit 102 transmits a control signal for displaying the corresponding language corresponding to the determined transmission method to the OSD unit 108, and the broadcast signal processing unit 110 to the control signal provided from the control unit 102. Accordingly, the video signal and the OSD for the corresponding language generated by the OSD unit 108 are mixed to be displayed on the monitor (not shown) and the voice is broadcasted at the same time (step 212). For example, the display language of the NTSC AM-FM transmission method is English, and the display language of the NTSC dual carrier transmission method can display Korean in the OSD method.

Meanwhile, while reproducing the voice multicast with the corresponding language corresponding to the transmission method, the controller 102 checks whether the user has a key input for changing the channel through an input unit (not shown) (step 214).

As a result of the check in step 214, if there is a key input for changing the channel, the control unit 102 transmits a control signal for tuning the broadcast signal of the changed channel, and provides audio after decoding the broadcast signal of the changed channel. The transmission method is determined according to the information on the signal transmission method, and the corresponding language is displayed through the monitor (not shown) through the OSD unit 108 and the broadcast signal processing unit 110 (step 216).

Accordingly, the transmission method may be determined according to the audio signal of the voice multiple broadcast received by the broadcast receiving system receiving the voice multiple broadcast, and a corresponding language may be generated and displayed on the menu screen using the OSD method.

As described above, the present invention is different from the conventional method in which a process of determining a transmission method is complicated and thus does not display a corresponding language immediately. By switching the corresponding language corresponding to the OSD and changing the channel while playing voice broadcasting, the corresponding language corresponding to the transmission method of the voice broadcasting received through the changed channel is displayed and displayed by the OSD method. In the broadcast receiving system for receiving voice multiple broadcasts, the display language can be automatically switched and displayed immediately according to the transmission method.

Claims (3)

A method of switching a display language in a broadcast receiving system for receiving voice multiple broadcasts, Determining whether there is a key input for receiving the voice multicast and displaying a language of the voice multicast; Checking a transmission method through an audio signal of the received voice multicast; A process of switching the corresponding language corresponding to the transmission method together with the voice multiplexing to display the OSD method Display language switching method of a broadcast receiving system comprising a. The method of claim 1, The transmission method may be any one of an NTSC AM-FM system and a dual carrier system. The method of claim 1, The method may further include displaying an OSD by switching a language corresponding to a transmission method of a voice multicast broadcast received through the changed channel when there is a key input for changing the voice multicast channel after the displaying. Display language switching method of the broadcast receiving system further comprising.

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