KR19990056471A - Audio Control Method of Satellite Broadcast Receiver - Google Patents

Abstract

The present invention relates to an audio control method of a satellite broadcast receiver capable of automatically setting an audio signal of a language desired by a user for a voice multicast program in a satellite broadcast receiver and automatically switching the output of the audio signal accordingly. A first step of setting an output language of the audio signal for a voice multiplex program including an audio signal in a plurality of languages among the various broadcast programs; A second step of determining whether the received broadcast program is the voice multiplex program when the broadcast program signal is received by the satellite broadcast receiver; A third step of checking whether or not the audio signal in the set language is included in the voice multiplexing program as a result of the determination; And a fourth step of outputting a video signal for the broadcast program and an audio signal in the set language when the audio signal in the set language is included.

Description

Audio Control Method of Satellite Broadcast Receiver

The present invention relates to a satellite broadcast receiver, and more particularly, to an audio control method of a satellite broadcast receiver suitable for setting a voice language output from a satellite broadcast receiver to a specific language.

In recent years, the broadcast method using satellites, which is rapidly expanding its use, is a method of providing broadcast signals to a wider area by using satellites (communication satellites) located at an altitude of about tens to hundreds of kilos on the earth's surface. In this satellite broadcasting system, for example, a Ku band RF signal having a frequency band of 11.7 GHz to 12.0 GHz is used.

To this end, the antenna for satellite broadcasting reception is provided with a low noise blockdown converter for converting a radio frequency (RF) signal of a very high frequency into an intermediate frequency (IF) signal, which is a high frequency RF signal. Is converted into an IF (intermediate frequency) signal in the hundreds to thousands of MHz bands (for example, 950 MHz to 2050 MHz) that can be received by a satellite broadcasting receiver (receiver).

Therefore, in the satellite broadcasting tuner provided in the satellite broadcasting receiver (receiver), the IF signal received through the low noise converter is inputted to tune the channel selected by the user. The satellite broadcasting receiver maximizes channel utilization, image and sound. Along with the improvement of signal quality and the ease of transmitting additional digital service data, the significant improvement of the user interface is a big advantage.

Meanwhile, various signals such as broadcast signals (video data and audio data), event information table (EIT), and time data table (TDT) for each channel are included in a satellite signal provided from a satellite, that is, a bit stream.

When the satellite broadcasting receiver is powered on, the various kinds of information are stored in a predetermined area of the memory means provided in the satellite broadcasting receiver and displayed on various menu screens at the request of the user. The information includes program information for each channel and detailed information about each program (for example, broadcast time, class, type, and the like).

In addition, since a broadcast program provided by a satellite broadcasting system supports voice multicasting as in the conventional analog terrestrial broadcast, a plurality of voice multiprograms exist in a satellite broadcast program provided from a satellite, and a user desires a language. You can select and watch the voice of.

However, in a conventional satellite broadcasting receiver, when a user views a voice multiple program, the output voice is basically output of the main voice, that is, the native language of the user (for example, Korean), and the user wants to change it. There is a key input means for outputting the desired voice.

That is, when a user watches a voice multicast program and wants to change the language of the voice signal output through the speaker, it is inconvenient to change the output of the audio signal every time using a key input means.

Accordingly, the present invention has been made in view of the foregoing, and the audio signal for the language set automatically when a user views the audio multi-program by presetting the output of the audio signal for the voice multi-program in the satellite broadcasting receiver in a specific language desired by the user. It is an object of the present invention to provide a language selection method of a satellite broadcasting receiver capable of outputting a signal.

In order to achieve the above object, the present invention provides a method for controlling the output of an audio signal according to the type of the broadcast program in a satellite broadcast receiver for receiving a signal for a broadcast program of various types provided through a satellite, A first step of setting an output language of the audio signal for a voice multiplex program including an audio signal in a plurality of languages of a broadcast program; A second step of determining whether the received broadcast program is the voice multiplex program when the broadcast program signal is received by the satellite broadcast receiver; A third step of checking whether or not the audio signal in the set language is included in the voice multiplexing program as a result of the determination; And a fourth step of outputting a video signal for the broadcast program and an audio signal in the set language when the audio signal in the set language is included.

1 is a block diagram of a satellite broadcast receiver suitable for applying an audio control method of a satellite broadcast receiver according to an embodiment of the present invention;

2 is a diagram illustrating an example of a language selection menu of a satellite broadcasting receiver according to an embodiment of the present invention;

3 is a flowchart illustrating an audio control process of a satellite broadcast receiver according to a preferred embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

110: key input unit 120: microcomputer

130: tuner and demodulator 140, 145: first and second memory sections

150: MPEG decoder 160: audio converter

170: video encoder 180: OSD unit

190: image synthesis unit

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.

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 satellite broadcast receiver suitable for applying an audio control method of a satellite broadcast receiver according to an exemplary embodiment of the present invention, and includes a key input unit 110, a microcomputer 120, a tuner, and a demodulator 130. And first and second memory units 140 and 145, an MPEG decoder 150, an audio converter 160, a video encoder 170, an OSD unit 180, and an image synthesizer 190.

Referring to FIG. 1, the key input unit 110 is configured with key metrics on a remote controller or its own panel to generate a corresponding key signal by a user's operation and provide the corresponding key signal to the microcomputer 120, and the microcomputer 120 provides a key. Each control signal is generated based on a key signal from the input unit 110 to perform a corresponding function. For example, a user processor selects a user broadcast channel from the outside, including a microprocessor that controls overall operation of the receiver. When a signal is input, a corresponding tuning control signal is generated and provided to the tuner and demodulator 130 to be described later.

The tuner and demodulator 130 tunes a broadcast channel selected by a user in a broadcast signal received through a broadcast signal receiver (ie, a satellite reception antenna), not shown, based on a tuning control signal provided from the microcomputer 120. The tuned broadcast channel signal is restored to a transport stream through a process of converting to an intermediate frequency, demodulation, and error correction, and the restored transport stream is provided to the next MPEG decoder 150.

The first memory unit 140 receives various additional information output from the tuner and demodulator 130 from the microcomputer 120 and stores the additional information in a predetermined area of the first memory unit 140, and from the key input unit 110. When the menu screen is required, the menu screen is provided to the OSD unit 180 through the microcomputer 120 again.

In addition, the second memory unit 145 stores basic audio information set by the user, that is, information for outputting a voice of a specific language in the voice multi-program, and the second memory unit 145 is configured by the user. It is possible to change the basic audio information and, for example, a flash memory as a memory means capable of retaining stored information even when the receiver is turned off.

On the other hand, in the MPEG decoder 150, on the basis of the decoding control signal provided from the microcomputer 120, the compressed and encoded audio signal and video signal of the broadcast channel provided from the tuner and demodulator 130, for example, a video signal. Considering the spatiotemporal and spatial correlations, the compressed coded video signal is restored to the original signal before encoding using a decoding technique such as variable length decoding, inverse DCT, inverse quantization, and motion compensation, and the digital broadcast video signal reconstructed here. Is provided to the next video encoder 170, and the reconstructed audio signal is provided to the audio converter 160.

In particular, the MPEG decoder 150 selectively decodes the main audio or the sub-audio based on the decoding control signal provided from the microcomputer 120 when the broadcast signal provided from the tuner and the demodulator 130 is an audio multi-program. The audio converter 160 is provided.

In addition, the audio converter 160 converts the digital audio signal output from the MPEG decoder 150 into an analog audio signal through a predetermined signal processing process and outputs the analog audio signal through a speaker (not shown). The selected digital broadcast video signal provided by the MPEG decoder 150 described above is converted into an NTSC or PAL analog video signal and then provided to the image synthesizer 190.

On the other hand, the OSD unit 180 is configured to provide a variety of menu screen information and message information provided from the microcomputer 120 as a guide screen of a predetermined form to the image synthesizer 190, the image synthesizer 190 is a video The analog satellite broadcasting signal output from the encoder 170 may be transmitted to a display side, not shown, or a screen including various menu screen data displayed through the OSD unit 180 may be transferred to a display side, not shown.

When the user operates the key input unit 110 to input a voice selection key signal in order to set a basic audio language for the voice multi-program in the satellite broadcasting receiver configured as described above, the microcomputer 120 may include a first memory unit ( The language selection menu screen as shown in FIG. 2 is displayed by reading the language selection menu information from the various menu screen information stored in 140 and providing it to the OSD unit 180.

Accordingly, the user selects the main voice or the sub-audio using the language selection menu screen displayed on the screen in FIG. 2, where the main voice represents the native language of the user and the sub-audio is different from the native language provided in the voice multicast program. Means voice for a language (eg, English, French, Japanese, etc.).

At this time, if the user selects a specific language of the sub-audio, the microcomputer 120 stores it in the second memory unit 145 and the broadcast program output from the tuner and the demodulator 130 is a voice multi-program. When the audio information of the program is read and the sub-audio matches the language set by the user, the decoding control signal is generated in the MPEG decoder 150 to decode only the audio signal of the corresponding language.

3 is a flowchart illustrating an audio control process of a satellite broadcasting receiver according to an exemplary embodiment of the present invention, which will be described in detail with reference to the accompanying drawings.

The basic audio language set by the user and the sub-language language for the voice multicast program are set using the menu screen as shown in FIG. 2 and stored in the second memory unit 145 (step 301). When the power of the receiver is turned on (operation 303) through operation of the operation 110, the microcomputer 120 generates a tuning control signal to the tuner and the demodulator 130 to display the most recently watched past channel or a predetermined specific signal. The broadcast signal of the channel is tuned (step 305).

At this time, the microcomputer 120 reads the audio information from the additional information on the corresponding program output from the tuner and the demodulator 130 (step 307), and determines whether the broadcast program currently received is a voice multi-program (step 307). 309). If the result of the determination is not an audio multiplexing program, a control signal for decoding the main audio signal of the tuned broadcast signal is generated and provided to the MPEG decoder 150 (step 311) to thereby receive the video of the received broadcast program. The signal and the main audio signal are output (step 317).

On the contrary, if the result of the determination in the above-described step 309 is a voice multiplex program, it is again checked whether the sub-voice of the corresponding program matches the language for the sub-voice preset in the second memory unit 145 by the user. If the language does not match the language set in the second memory unit 145 (step 313), the output of the audio signal is set to the main audio mode as in step 311 described above. At this time, if it matches the sub-language language set in the second memory unit 145, the microcomputer 120 sets the output of the MPEG decoder 150 in the sub-audio mode (step 315).

Therefore, the MPEG decoder 150 decodes the audio signal and the video signal for the sub-audio among the audio signals of the broadcast program output from the tuner and the demodulator 130, so that an image of the corresponding program is output to the display side, not shown. The omitted speaker outputs a sub-audio for the program (step 317).

While the video signal and audio signal of the tuned program are output through the respective processes as described above, the channel tuned through the key input unit 110 is changed or the currently viewed program is terminated. If this is changed (step 319), the microcomputer 120 repeats the process after step 305 described above to automatically switch the output of the audio signal according to the audio information of the tuned channel.

As a result, when the voice multiplex program is received, it is detected whether the audio signal of the corresponding program includes the audio signal of the language set by the user and automatically switches the output of the voice multiplex audio signal accordingly.

As described above, according to the present invention, the user can automatically switch the audio signal for the voice multi-program by watching the basic audio language for various voice multi-programs provided to the satellite broadcasting receiver in a desired language. There is an effect that can improve the overall function of the satellite broadcast receiver accordingly.

Claims (3)

In the method of controlling the output of the audio signal in accordance with the type of the broadcast program in a satellite broadcast receiver for receiving a signal for various types of broadcast program provided via a satellite, A first step of setting an output language of the audio signal for a voice multiplex program including an audio signal in a plurality of languages among the various broadcast programs; A second step of determining whether the received broadcast program is the voice multiplex program when the broadcast program signal is received by the satellite broadcast receiver; A third step of checking whether or not the audio signal in the set language is included in the voice multiplexing program as a result of the determination; And a fourth step of outputting a video signal for the broadcast program and an audio signal in the set language when the audio signal in the set language is included. The method of claim 1, wherein the fourth step further comprises: receiving a broadcast program of the switched channel and repeating the process after the second step when a channel switching signal of the satellite broadcasting receiver is generated. Audio control method of satellite broadcasting receiver. The audio control method of claim 1, wherein the fourth step further comprises repeating the process after the second step when the outputted broadcast program ends and another broadcast program is received. .