KR100750471B1 - Method for playing broadcasting of digital multimedia broadcasting system - Google Patents

Abstract

A method for reproducing broadcast in a digital multimedia broadcasting system is provided to simultaneously reproduce two or more broadcasting signals corresponding to two or more broadcasting services, which are selected according to program guide information using a data signal. When a digital broadcasting service is requested, a broadcasting signal is received through tuning of the corresponding frequency(206). The received broadcasting signal is divided into a video signal, an audio signal, and a data signal(208). EPG(Electronic Program Guide) information is displayed according to a predetermined condition by temporarily buffering the video signal and the audio signal and parsing the data signal(212). When a specific broadcasting service is selected according to the displayed EPG information, the video signal, the audio signal, and the data signal of the corresponding broadcasting signal are parsed or decoded to simultaneously reproduce the broadcasting signal and the EPG information according to the predetermined condition(218).

Description

Broadcast reproduction method of digital multimedia broadcasting system {METHOD FOR PLAYING BROADCASTING OF DIGITAL MULTIMEDIA BROADCASTING SYSTEM}

1 is a block diagram of a digital multimedia broadcasting system suitable for reproducing a digital broadcast selected according to program guide information according to the present invention;

2 is a flowchart illustrating a process of playing a selected terrestrial digital multimedia broadcasting through electronic program guide information according to an embodiment of the present invention;

3 is a flowchart illustrating a process of playing a terrestrial digital multimedia broadcast selected through electronic program guide information according to another embodiment of the present invention.

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

102: key input block 104: control block

106: tuning and demodulation block 108: baseband block

110: buffer block 112: reverse packetizer and parsing block

114: Menu Creation Block 116: Signal Processing Block

118: decoding block

The present invention relates to a method for reproducing digital broadcasting of a digital multimedia broadcasting system. More particularly, the present invention relates to a digital multimedia broadcasting system suitable for reproducing broadcast signals while searching for a broadcast service by displaying a data signal in a terrestrial digital multimedia broadcasting system. It relates to a broadcast reproduction method of.

As is well known, digital multimedia broadcasting (DMB) is a broadcasting service for digitally fixing various multimedia signals such as voice and video to a receiver, a portable, and a vehicle receiver. For example, terrestrial DMB, satellite DMB, etc. Serviced.

And, terrestrial DMB is already allocated to channel 12 of the very high frequency (VHF) bands corresponding to 174MHz to 216MHz of television channels 7 to 13, and the channel 12 is divided into three frequency blocks (multiplexers). Allocates 1054 Mbps of bandwidth per block to accommodate one video channel and three audio and data channels, accommodating three video channels and nine audio and data channels with the bandwidth of one channel (VHF 12) on analog TV can do. As such, terrestrial digital multimedia broadcasting can use digital technology to greatly increase frequency efficiency.

In addition, satellite DMB is serviced in the 2.630 GHz to 2.655 GHz band, which is much higher than the terrestrial, which is much higher than terrestrial, and is covered by news, music videos, sports, movies, dramas and music from the ground-based satellite DMB center. Various content such as, jazz, foreign language, securities, traffic, weather, etc. to K-band frequency (13.824 GHz-13.883 GHz) to the satellite, and the S-band (2.630 GHz-2.655 GHz) Service by sending to the ground receiving device through. Since the satellite DMB is relatively high frequency, it can accommodate much more various channels than the terrestrial DMB, and can broadcast nationwide at once.

Meanwhile, in the conventional terrestrial digital multimedia broadcasting system, electronic program guide (EPG) is provided through a MOT channel among DAB data channels, and thus, program guide information is provided like a satellite DMB while a program guide service is provided. At the same time, there was a problem in that terrestrial digital multimedia broadcasting could not be viewed.

Accordingly, the present invention is to solve the above-described problems of the prior art, the video broadcasting and audio signals are buffered by tuning the digital broadcast in the terrestrial digital multimedia broadcasting system, the video selected according to the electronic program guide information using the data signal And a digital broadcast reproducing method of a digital multimedia broadcasting system capable of extracting and reproducing an audio signal.

Another object of the present invention is to provide a digital broadcast reproduction method of a digital multimedia broadcasting system capable of simultaneously playing respective selected broadcast signals when two or more broadcast services are selected according to program guide information using data signals.

In order to achieve the above object, the present invention provides a method of reproducing digital broadcasting in a digital multimedia broadcasting system for receiving and reproducing terrestrial digital multimedia broadcasting. When the digital broadcasting service is requested, a broadcast signal is received by tuning a corresponding frequency. And dividing the broadcast signal into a video signal, an audio signal, and a data signal, temporarily buffering the separated video signal and an audio signal, parsing the data signal, and converting the electronic program guide information to a predetermined condition. And displaying the electronic program guide according to a preset condition by parsing or decoding the corresponding broadcast signal among the video signal, the audio signal, and the data signal when a specific broadcast service is selected according to the displayed electronic program guide information. At the same time with the information It provides a digital broadcast reproduction method of a digital multimedia broadcasting system comprising the step of reproducing.

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.

A key technical aspect of the present invention is that when a digital broadcasting service is requested in a digital multimedia broadcasting system that receives and reproduces a terrestrial digital multimedia broadcasting, the corresponding broadcasting signal is received and separated into a video signal, an audio signal, and a data signal, and the separated video is separated. After buffering the signal and the audio signal, the data signal is parsed and the program guide information is displayed according to a preset condition. Accordingly, when a specific broadcast service is selected, the corresponding video signal and the audio signal among the buffered video signal and the audio signal are selected. By decoding and simultaneously playing according to preset conditions, it is easy to achieve the object of the present invention through such technical means.

1 is a block diagram of a digital multimedia broadcasting system suitable for reproducing a digital broadcast selected according to program guide information according to the present invention, and includes a key input block 102, a control block 104, an RF module block 106, and a base. Band block 108, buffer block 110, inverse packetizer and parsing block 112, menu generation block 114, signal processing block 116 and decoding block 118.

Referring to FIG. 1, the key input block 102 generates various operation signals for controlling the operation of a digital multimedia broadcasting system, including, for example, a remote controller and the like. For example, when a key for requesting a digital multimedia broadcasting service is input by using a remote controller, a function of generating a broadcast service request key operation signal is provided to the control block 104 in response thereto.

In addition, the control block 104 performs overall operation control of the digital multimedia broadcasting system. The control block 104 tunes a corresponding frequency of the terrestrial digital multimedia broadcasting to convert a received signal into a IF signal and converts a control signal into an IF signal. 106), and demodulates the IF signal to separate each broadcast signal into TS (Transport Stream) (i.e., divides it into a video signal, an audio signal, and a data signal) to transmit a control signal to the buffer block 110. The base band block 108. Here, the video signal and the audio signal among the separated broadcast signals are temporarily buffered in the buffer block 110, and the data signal means a data signal including electronic program guide information of the MOT channel.

In addition, the control block 104 provides a control signal for transmitting the data signal of the buffered broadcast signal to the reverse packetizer and the parsing block 112 to the buffer block 110, and provides the parsed data signal to the electronic program guide. The control signal for constructing and generating as information is provided to the menu generation block 114, and the control signal for signal processing such electronic program guide information and displayed on a monitor (not shown) is provided to the signal processing block 116. .

Meanwhile, in the control block 104, when a user selects a specific broadcast service using an input unit (not shown), for example, a remote controller or a keypad, through the displayed electronic program guide information (EPG), key input accordingly is performed. After checking whether there is a specific broadcast service selection key operation signal provided from block 102, a control signal for extracting and delivering a broadcast signal for the selected specific broadcast service is provided to the buffer block 110, and the extracted broadcast is provided. A control signal for decoding signals (video signals and audio signals) is provided to the decoding block 118, and a control signal for signal processing and reproduction is provided to the signal processing block 116.

Next, the RF module block 106 tunes the corresponding frequency of the terrestrial multimedia broadcast according to the control signal provided from the control block 104 to frequency convert the received broadcast signal into an IF signal and converts the received broadcast signal into an IF signal to the baseband block 108. To pass.

The baseband block 108 demodulates the transmitted IF signal using an orthogonal frequency division multiplexing (OFDM) scheme to separate broadcast signals according to the fast information channel (FIC) and the main service channel (MSC) (that is, the video signal). And separates the audio signal and the data signal) and transfers them to the buffer block 110.

On the other hand, the buffer block 110 is a video signal and the audio signal of the video signal, audio signal and data signal transmitted separately separated into the transport stream, while the data signal is buffered inversely, the packetizer and parsing block 112 To pass.

In addition, the inverse packetizer and the parsing block 112 parse the electronic program guide information from the data signal of the MOT channel to be transmitted, and then transfer the electronic program guide information to the menu generation block 114, and the menu generation block 114 displays the electronic program. A menu screen for the guide information is constructed, generated, and transmitted to the signal processing block 116.

Next, the signal processing block 116 displays a menu screen for the electronic program guide information to be transmitted through a monitor (not shown) by mixing it with a video signal and delivered when a specific broadcast service is selected through the electronic program guide information. The broadcast signals (video signals and audio signals) are signal processed and reproduced through a monitor and a speaker (not shown). Here, the video signal and the data signal are displayed according to a preset condition through an image scaler, and the preset condition may include, for example, a display position, a display size, and the like.

Further, in the signal processing block 116, from the menu generation block 114 and the broadcast signal (video signal and audio signal) transmitted from the decoding block 118 when two or more broadcast services are selected through electronic program guide information. The delivered menu screens are respectively adjusted according to preset conditions and displayed through a monitor and a speaker (not shown). For example, when radio broadcasting and data broadcasting are selected, the radio broadcasting is signal-processed and output through a speaker not shown, and at the same time, the data broadcasting is set in a predetermined condition (for example, display position, display size, etc.). Can be displayed on a monitor not shown.

On the other hand, the decoding block 118, for example, variable length decoding, inverse to the broadcast signal (video signal and audio signal) extracted and transmitted from the buffer block 110 when a specific broadcast service is selected through the electronic program guide information A decoding method such as DCT, inverse quantization, and motion compensation is used to restore the original signal before encoding to the signal processing block 116. Here, the video signal performs MPEG decoding, and the audio signal performs BSAC (Bit Sliced Arithmetic Coding) decoding.

Next, when requesting a digital broadcasting service in the digital multimedia broadcasting system having the above-described configuration, after temporarily tuning the received video signal and audio signal by tuning the corresponding frequency, the data signal of the MOT channel is converted into electronic program guide information. The process of extracting and playing back the selected specific broadcast signal through the electronic program guide information will be described.

2 is a flowchart illustrating a process of playing a terrestrial digital multimedia broadcasting selected through electronic program guide information according to an embodiment of the present invention.

2, in the standby mode of the terrestrial digital multimedia broadcasting system (step 202), in the control block 104, the user requests a broadcast service using an input unit (not shown), for example, a remote controller or a keypad. When a key is inputted, it is checked accordingly if there is a broadcast service request key operation signal generated from the key input block 102 (step 204).

As a result of the check in step 204, if there is a broadcast service request key operation signal, the tuning and demodulation block 106 corresponds to the requested terrestrial digital multimedia broadcasting service according to the tuning control signal provided from the control block 104. The frequency is tuned to receive the digital broadcast signal (step 206).

The baseband block 108 demodulates the received broadcast signal according to the separation control signal provided from the control block 104 by the OFDM scheme, and separates the received broadcast signal into a video signal, an audio signal, and a data signal, respectively, and the buffer block 110. (Step 208).

Next, the buffer block 110 transfers the data signal to the inverse packetizer and the parsing block 112 while temporarily buffering the video signal and the audio signal transmitted from the baseband block 108, and inverse packet tie. The low and parsing block 112 parses this data signal into electronic program guide information (EPG) (step 210). Here, the data signal means a data signal including electronic program guide information of the MOT channel.

In addition, the menu generation block 114 configures and generates the parsed electronic program guide information as a menu screen, and the signal processing block 116 adjusts the generated menu screen according to a preset condition and displays the image on a monitor not shown. (Step 212). Here, the preset condition may include, for example, a display position, a display size, and the like.

Accordingly, in the control block 104, when the user inputs a key for selecting a specific broadcast service using an input unit (not shown), for example, a remote controller or a keypad, through the displayed electronic program guide information menu screen, Accordingly, it is checked whether there is a specific broadcast service selection key operation signal generated from the key input block 102 (step 214).

As a result of the check in the step 214, when there is a specific broadcast service selection key operation signal, the buffer block 110 broadcasts a video signal (video signal) for the specific broadcast service selected according to the extraction control signal provided from the control block 104. And an audio signal) to be delivered to the decoding block 118, where the decoding block 118 decodes the transmitted video signal and the audio signal (step 216). Here, the video signal performs MPEG decoding, and the audio signal performs BSAC (Bit Sliced Arithmetic Coding) decoding.

In the signal processing block 116, the decoded video signal and the audio signal are processed to be mixed with the video signal and the electronic program guide information menu screen to be displayed and displayed on a monitor, not shown according to a preset condition, and the audio signal. Is output through a speaker (not shown) to reproduce the broadcast signal (step 218). Here, the video signal and the data signal are displayed according to a preset condition through an image scaler, and the preset condition may include, for example, a display position, a display size, and the like.

Accordingly, the terrestrial digital multimedia broadcasting system temporarily buffers a video signal and an audio signal of a broadcast signal, parses the data signal, and provides the electronic program guide information menu screen to extract a broadcast signal for a selected broadcast service to a predetermined condition. You can play it accordingly.

Next, when requesting a digital broadcasting service in the digital multimedia broadcasting system having the above-described configuration, after temporarily tuning the received video signal and audio signal by tuning the corresponding frequency, the data signal of the MOT channel is converted into electronic program guide information. And a process of extracting and simultaneously playing two or more selected specific broadcast signals through the electronic program guide information.

3 is a flowchart illustrating a process of playing a terrestrial digital multimedia broadcasting selected through electronic program guide information according to another embodiment of the present invention.

Referring to FIG. 3, in the standby mode of the terrestrial digital multimedia broadcasting system (step 302), the control block 104 requests a broadcast service by using a user's input means, for example, a remote controller or a keypad, not shown. When a key is inputted, it is checked accordingly if there is a broadcast service request key operation signal generated from the key input block 102 (step 304).

As a result of the check in the step 204, if there is a broadcast service request key operation signal, the tuning and demodulation block 106 performs a request for the requested terrestrial digital multimedia broadcasting service according to the tuning control signal provided from the control block 104. Tuning the corresponding frequency to receive the digital broadcast signal, demodulating the received broadcast signal by the OFDM scheme, and separating the received broadcast signal into a video signal, an audio signal, and a data signal to the buffer block 110 (step 306).

Next, the buffer block 110 transfers the data signal to the inverse packetizer and the parsing block 112 while temporarily buffering the video signal and the audio signal transmitted from the baseband block 108, and inverse packet tie. The low and parsing block 112 parses the data signal into electronic program guide information (EPG), generates and generates parsed electronic program guide information into a menu screen, and the signal processing block 116 generates the generated menu screen. The control is performed according to the preset conditions and displayed on a monitor (not shown) (step 308). Herein, the data signal means a data signal including electronic program guide information of the MOT channel, and the preset condition may include, for example, a display position, a display size, and the like.

Accordingly, in the control block 104, a user inputs a key for selecting two or more specific broadcast services by using an input unit (not shown), for example, a remote controller or a keypad, through the displayed electronic program guide information menu screen. If so, it is checked whether there are two or more specific broadcast service selection key operation signals generated from the key input block 102 (step 214).

As a result of the check in the step 214, if there are two or more specific broadcast service selection key operation signals, the buffer block 110 broadcast signals for the specific broadcast service selected according to the extraction control signal provided from the control block 104. (Video signal and audio signal) is extracted and delivered to decoding block 118, and decoding block 118 decodes the transmitted video signal and audio signal (step 312). Here, the video signal performs MPEG decoding, and the audio signal performs BSAC (Bit Sliced Arithmetic Coding) decoding.

In the signal processing block 116, the decoded video signal and the audio signal are processed to be mixed with the video signal and the electronic program guide information menu screen to be displayed and displayed on a monitor, not shown according to a preset condition, and the audio signal. Is output through a speaker (not shown) to reproduce the broadcast signal (step 314). Here, the video signal and the data signal are displayed according to a preset condition through an image scaler, and the preset condition may include, for example, a display position, a display size, and the like.

Meanwhile, in another embodiment of the present invention described above by selecting two or more specific broadcast services through the electronic program guide information menu screen, the electronic program guide information menu screen while playing a video broadcast or radio broadcast It goes without saying that data broadcasting can be simultaneously played back.

Accordingly, the terrestrial digital multimedia broadcasting system temporarily buffers a video signal and an audio signal among broadcast signals in the terrestrial digital multimedia broadcasting system, parses the data signal, and provides the electronic program guide information menu screen to provide information about two or more selected broadcasting services. The broadcast signal may be extracted and reproduced according to a preset condition.

In the foregoing description, the present invention has been described with reference to preferred embodiments, but the present invention is not necessarily limited thereto. Those skilled in the art will appreciate that the present invention may be modified without departing from the spirit of the present invention. It will be readily appreciated that branch substitutions, modifications and variations are possible.

As described above, according to the present invention, when a digital broadcasting service is requested in a digital multimedia broadcasting system that receives and reproduces a terrestrial digital multimedia broadcasting, the present invention receives a corresponding broadcasting signal, divides the video signal into a video signal, an audio signal, and a data signal, and separates the separated video. After buffering the signal and the audio signal, the data signal is parsed and the program guide information is displayed according to preset conditions. Accordingly, when a specific broadcast service is selected, the corresponding video signal and the audio signal among the buffered video signal and audio signal are displayed. By decoding and simultaneously playing according to a predetermined condition, the digital multimedia broadcasting system can reproduce a video signal and an audio signal while searching for a broadcast service through electronic program guide information according to a data signal.

In addition, when a digital multimedia broadcasting system is requesting data broadcasting through electronic program guide information while playing a video broadcasting or a radio broadcasting, the user's convenience is enhanced by playing the requested data broadcasting along with the corresponding video broadcasting or radio broadcasting. You can.

Claims (4)

A method of reproducing digital broadcasting in a digital multimedia broadcasting system for receiving and playing terrestrial digital multimedia broadcasting, When the digital broadcast service is requested, tuning a corresponding frequency to receive a broadcast signal; Separating the broadcast signal into a video signal, an audio signal, and a data signal; Temporarily buffering the separated video signal and the audio signal, parsing the data signal, and displaying electronic program guide information according to a preset condition; When a specific broadcast service is selected according to the displayed electronic program guide information, parsing or decoding the corresponding broadcast signal among the video signal, audio signal, and data signal and simultaneously playing the electronic program guide information according to a preset condition. Digital broadcast reproduction method of the digital multimedia broadcasting system comprising a. The method of claim 1, The digital broadcast reproduction method, Checking whether at least two broadcast services are selected through the displayed electronic program guide information; When the at least two broadcast services are selected, parsing or decoding the corresponding broadcast signals among the video signal, the audio signal, and the data signal, respectively, and simultaneously playing them according to a preset condition; Digital broadcast reproduction method of the digital multimedia broadcasting system further comprising. The method according to claim 1 or 2, The reproduction according to the preset condition is performed in such a manner that the video signal and the data signal among the video signal, the audio signal and the data signal are displayed through an image scaler. . The method according to claim 1 or 2, The preset condition includes a display position and a display size of the digital broadcast reproducing method of the digital multimedia broadcasting system.

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