KR20100132801A - Method and apparatus for receving digital broadcasting signal - Google Patents

Abstract

PURPOSE: A digital broadcast receiving method and an apparatus thereof for offering optimum environment for watching a digital broadcasting are provided to supply an optimal watching environment by outputting an audio signal to an external sound processing device. CONSTITUTION: A data stream in which a digital broadcasting signal is included is received(300). Audio channel information is extracted from the received data stream(310). It determines whether the audio signal is outputted by using the extracted audio channel information(320). If so, an audio output apparatus is turned on(330). The audio signal included in the data stream is transmitted to the audio output apparatus(350).

Description

Method and apparatus for receiving digital broadcasting {Method and apparatus for receving digital broadcasting signal}

The present invention relates to a method for receiving digital broadcasting and a digital broadcasting apparatus, and more particularly, to a method for processing an audio signal included in digital broadcasting.

In general, the broadcast reception device receives a data stream including a broadcast signal, extracts a video and audio data stream corresponding to a channel desired by a user using service information included in the received data stream, and outputs the stream to the display device.

Digital television receivers, for example, have the ability to convert incoming broadcast signals into digital codes to add high-quality screen playback and add features. In digital broadcasting, video and audio streams are compressed and broadcast as digital information, and system information and program information are compressed and broadcast in accordance with the Program and System Information Protocol (PSIP) standard.

An object of the present invention is to provide a method and apparatus for receiving digital broadcasting which can provide a user with an optimal environment for watching digital broadcasting.

In accordance with another aspect of the present invention, a broadcast receiving method includes: receiving a data stream including a digital broadcast signal; Extracting audio channel information from the received data stream; Determining whether the audio signal is externally output using the extracted audio channel information; If the external output is determined, powering on an externally connected sound output device; And transmitting an audio signal included in the data stream to the sound output device.

Meanwhile, the broadcast receiving method may be implemented using a computer readable recording medium that records a program to be executed in a computer.

In addition, the digital broadcasting apparatus according to the present invention may process the received broadcast signal using the broadcast receiving method.

According to an embodiment of the present invention, by outputting an audio signal included in the digital broadcast signal to the sound processing device connected to the outside according to the channel information, it is possible to provide the user with an optimal viewing environment according to the received broadcast signal, Accordingly, the usability of the digital broadcasting device can be improved.

Hereinafter, an image processing method and apparatus according to the present invention will be described in detail with reference to FIGS. 1 to 7.

1 is a block diagram illustrating a configuration of a digital broadcasting system according to an exemplary embodiment of the present invention. The illustrated digital broadcasting system may include a digital broadcasting apparatus 100 and a sound output apparatus 200.

Referring to FIG. 1, the digital broadcasting apparatus 100 receives a data stream including a digital broadcasting signal through a satellite, a cable, or the like, and video corresponding to a channel selected by a user from the received data stream. And extract and process an audio signal.

For example, video and audio data are compressed into digital information, and system information and program information are compressed according to the Program and System Information Protocol (PSIP) standard to be generated as a data stream together with the compressed video and audio data to be digitally broadcast. May be sent to device 100.

The PSIP is a standard for terrestrial and cable digital broadcasting that defines program and system information standards. The PSIP parses signals encoded according to the Moving Picture Experts Group (MPEG) standard and provides various information about a program. It is defined to do so.

More specifically, the digital broadcasting apparatus 100 extracts service information from a received data stream and separates various channel information therefrom and a video and audio data extracted from the data stream. It may include an A / V processing unit (not shown) for decoding.

The digital broadcasting apparatus 100 receives a data stream including a digital broadcasting signal by using an antenna or a cable, converts a video signal and an audio signal from the received data stream into a displayable form, and outputs the set top. It may be a set-top box (STB).

Alternatively, the digital broadcasting apparatus 100 may be a display apparatus that receives a broadcast signal, more specifically, a video signal and an audio signal from an external source, and outputs an image and an audio.

The display apparatus may include a digital broadcast receiving module such as the set top box (STB) to directly receive a data stream including a digital broadcast signal, or to receive video and audio signals received and processed by an externally connected set top box (STB). You can also receive input.

However, the digital broadcasting apparatus 100 according to the present invention is not limited to a set top box (STB) or a display apparatus, and may include any kind of apparatus capable of receiving and processing a data stream including a digital broadcasting signal from the outside. Can be.

The sound processing apparatus 200 is connected to the digital broadcasting apparatus 100 by wire or wirelessly, and outputs an audio signal input from the digital broadcasting apparatus 100. For that purpose, the sound output device 200 may comprise a speaker system, for example a 5.1 channel speaker system.

Meanwhile, in addition to the function of outputting an audio signal input from the digital broadcasting apparatus 100, the sound output apparatus 200 may transmit a video signal or an audio signal to the digital broadcasting apparatus 100 or input from the digital broadcasting apparatus 100. It may be a device for performing various functions such as outputting an image using the video signal.

According to an embodiment of the present invention, the sound processing apparatus 200 may be connected to the digital broadcasting apparatus 100 using a high definition multimedia interface (HDMI) or a wired / wireless LAN (Local Area Network).

The HDMI is a digital interface based on DVI, which is a format integrating video and audio signals into one digital interface. The HDMI supports standard, extended or HD video as well as standard-multi-channel audio signals, and can transmit uncompressed digital video signals of up to 6 gigabytes per second to one terminal.

In addition, the HDMI consists of three independent communication channels, such as Transition Minimized Differential Signaling (TMDS), Display Data Channel (DDC), and Consumer Electronics Control (CEC), through which video and audio signals, device information, and control commands are provided. Etc. can be transmitted and received.

The digital broadcasting apparatus 100 and the sound processing apparatus 200 may perform bidirectional communication using the HDMI CEC line. The HDMI CEC is an additional protocol for performing high-level control functions in HDMI and can be used even in a small transmission speed and a small memory environment.

The digital broadcasting apparatus 100 according to the embodiment of the present invention may transmit the audio signal to the sound processing apparatus 200 according to the channel information of the audio signal included in the received data stream, and the sound processing apparatus 200 may The transmitted audio signal may be output using the provided speaker system.

For example, the audio signal included in the data stream may be set as a default provided in the digital broadcasting apparatus 100 or output to a connected speaker, and the digital broadcasting apparatus 100 may be configured as an audio signal. It may be determined whether to output the audio signal through the external sound output device 200 according to the channel information.

More specifically, the digital broadcasting apparatus 100 may include a 5.1-channel speaker system when the audio signal included in the data stream is a multi-channel sound such as a Dolby or DTS (Digital Theater System) signal. It may be transmitted to the external sound output device 200 including a high quality speaker system such as the output.

On the other hand, when the external sound output device 200 is in a power off state, in order to output an audio signal from the sound output device 200 as described above, the digital broadcasting device 100 may output the sound output device. An operation to turn on 200 may be required.

Hereinafter, the operation of the digital broadcasting apparatus 100 illustrated in FIG. 1 will be described in detail with reference to a flowchart illustrating a digital broadcasting receiving method according to an embodiment of the present invention illustrated in FIG. 5.

First, the digital broadcasting apparatus 100 receives a data stream including a digital broadcasting signal through an antenna or a cable (step 300).

Thereafter, the digital broadcasting apparatus 100 may extract and process the video and audio signals corresponding to the channel selected by the user from the received data stream, and the extracted video data may be processed by the digital broadcasting apparatus 100. An image of a received digital broadcast may be displayed by being input to a display unit (not shown) included in the display unit or a display device (not shown) connected to the outside.

The digital broadcasting apparatus 100 extracts audio channel information on an audio signal from the received data stream (step 310). The audio channel information may include information about the type of the audio signal or the number of channels.

Thereafter, the digital broadcasting apparatus 100 determines whether to output the audio signal included in the data stream to the external sound output apparatus 200 by using the extracted audio channel information (step 320).

For example, when the type of the audio signal is a multi-channel sound such as Dolby or DTS, the digital broadcasting device 100 may determine that the audio signal is output from the external sound output device 200.

A method of determining whether the digital broadcasting apparatus 100 outputs an external audio signal in step 320 will be described in detail with reference to FIG. 6.

When it is determined that the audio signal is output to the external voice output apparatus 200 as a result of the determination, the digital broadcasting apparatus 100 turns on the voice output apparatus 200 (step 330).

For example, the digital broadcasting apparatus 100 may power on the voice output apparatus 200 by using an HDML CEC line or a wired / wireless LAN connected to the voice output apparatus 200. This is because the digital broadcasting apparatus 100 and the voice output apparatus 200 may transmit and receive a signal through the HDML CEC line even when the voice output apparatus 200 is powered off.

The digital broadcasting apparatus 100 may include an HDMI transmitter and an HDMI connector, and the sound output device 200 may also include an HDMI connector and an HDMI receiver.

The digital broadcasting apparatus 100 may transmit a CEC frame for powering on the sound output apparatus 200 to the sound output apparatus 200 through the input / output port of the HDMI connection unit. In addition, the sound output device 200 receives the CEC frame received from the digital broadcasting device 100.

Power-on operations may be performed using arbitrary header blocks and data blocks.

Meanwhile, the digital broadcasting apparatus 100 adjusts the setting of the sound output apparatus 200 according to the property of the audio signal included in the digital broadcasting or the viewing environment of the user (step 340).

For example, the digital broadcasting apparatus 100 adjusts a volume level at which an audio signal is output from the sound output apparatus 200 by using audio channel information extracted from the data stream or information about a viewing environment of a user. Can be.

More specifically, when the audio signal is a Dolby signal, the digital broadcasting device 100 may set the sound output mode of the sound output device 200 to a mode optimized for the Dolby digital signal.

In addition, the digital broadcasting apparatus 100 automatically adjusts the volume of the audio output apparatus 200 according to the volume at which the user currently watches digital broadcasting, that is, the viewing volume set in the digital broadcasting apparatus 100, or at the current viewing time. Accordingly, the volume of the sound output device 200 may be adjusted. For example, when the current time is evening, the digital broadcasting apparatus 100 may adjust the volume of the sound output apparatus 200 by setting it to a slightly lower level.

Thereafter, the digital broadcasting apparatus 100 transmits the audio signal of the digital broadcasting to the external sound output apparatus 200 (step 350).

FIG. 6 is a flowchart illustrating an embodiment of step 320 of determining whether to output an external audio output shown in FIG. 5.

Referring to FIG. 6, the digital broadcasting apparatus 100 determines whether the number of channels of the audio signal of the digital broadcasting currently received is equal to or greater than n, which is a preset reference value, using the audio channel information extracted from the received data stream ( Step 321).

The reference value n of the number of channels may be determined in consideration of the number of channels of the speaker system provided in or connected to the digital broadcasting apparatus 100 and the number of channels of the speaker system provided in the sound output apparatus 200.

For example, when the speaker system included in or connected to the digital broadcasting apparatus 100 is two channels, and the speaker system included in the sound output apparatus 200 is 5.1 channel, the reference value may be set to three channels.

If the number of channels of the audio signal is more than n channels, the digital broadcasting apparatus 100 checks whether the external sound apparatus 200 connected to the HDMI CEC line or the wired / wireless LAN exists (step 322).

If there is a sound output device 200 connected to the digital broadcast device 100, the digital broadcast device 100 requests the user to select whether to output the external device (step 323).

For example, the digital broadcasting apparatus 100 may output the audio of the digital broadcasting using the external sound output apparatus 200 through a display unit (not shown) or a connected display apparatus (not shown). The screen for asking a question is output, and the user may perform an input for selecting whether to output the external message in response to the question.

When the user selects the external output of the audio according to the request (step 324), the digital broadcasting apparatus 100 determines to output the audio signal of the digital broadcasting to the external sound output apparatus 200 (step 325).

2 to 4 are block diagrams illustrating still another embodiment of the configuration of the digital broadcasting apparatus according to the present invention. The digital broadcasting apparatus may include at least one of a broadcast receiving apparatus 110 and a display apparatus 120 such as a set-top box. It may include one.

Referring to FIG. 2, the broadcast reception device 110 receives a data stream including a digital broadcast signal through an antenna or a cable, and then performs video and audio data corresponding to a channel selected by a user from the received data stream. May be extracted and processed and then output to the display apparatus 120.

The display device 120 outputs an image and audio using video and audio signals input from the broadcast receiving device 110. For example, the liquid crystal display (LCD), the plasma display panel (PDP), and the electroluminescent (ELD) device may be used. Display), VFD (Vacuum Fluorescent Display) can be used to display images using a variety of display methods.

The broadcast reception device 110 performs the broadcast reception method as described above, and performs external sound processing connected to the audio signal using an HDML CEC line or a wired or wireless LAN according to channel information of an audio signal included in the received data stream. May transmit to the device 200.

In addition, the broadcast receiving device 110 may power on the sound processing device 200 using the HDML CEC line or the wired or wireless LAN such that the audio signal is transmitted to the sound processing device 200 and output.

Referring to FIG. 3, the display apparatus 120 that receives and outputs a video and audio signal from the broadcast receiving apparatus 110 may perform the broadcast receiving method as described above to determine the audio signal included in the received data stream. According to the channel information, the audio signal may be transmitted to the connected external sound processing apparatus 200 using an HDML CEC line or a wired or wireless LAN.

In addition, the display apparatus 120 may power on the sound processing apparatus 200 using the HDML CEC line or the wired or wireless LAN such that the audio signal is transmitted to the sound processing apparatus 200 and output.

Referring to FIG. 4, the display apparatus 120 may directly receive a data stream including a digital broadcast signal by using an antenna or a cable to output a video and audio of a digital broadcast. The device 110 may be provided inside the display device 120.

The sound output device 200 may be a home theater system (HTS) including an image device 210 and a speaker 220.

For example, the video device 210 may be one of devices having various functions such as a DVD player, a PC, an audio / video recorder, and a speaker using wired or wireless communication to the video device 210. 220 may be connected.

The display apparatus 120 turns on the image device 210 according to the channel information of the audio signal, adjusts the setting of the image device 210, and then outputs the audio signal of the received digital broadcast signal to the image device 210. Can be sent to. In addition, the image device 210 processes the audio signal transmitted from the display apparatus 120 according to the adjusted setting and outputs the audio signal to the speaker 220 so that the audio of the digital broadcast is output from the speaker 220. Can be.

In addition, the above-described broadcast receiving method according to the present invention may be stored in a computer-readable recording medium that is produced as a program to be executed in a computer, and examples of the computer-readable recording medium include ROM, RAM, CD- ROMs, magnetic tapes, floppy disks, optical data storage, and the like, and also include those implemented in the form of carrier waves (eg, transmission over the Internet).

The computer readable recording medium can be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. In addition, functional programs, codes, and code segments for implementing an image processing method may be easily inferred by programmers in the art.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention.

1 is a block diagram showing the configuration of a digital broadcasting system according to an embodiment of the present invention.

2 is a block diagram showing a configuration of a digital broadcasting apparatus according to a first embodiment of the present invention.

3 is a block diagram showing the configuration of a digital broadcasting apparatus according to a second embodiment of the present invention.

4 is a block diagram showing the configuration of a digital broadcasting apparatus according to a third embodiment of the present invention.

5 is a flowchart illustrating a digital broadcast reception method according to an embodiment of the present invention.

FIG. 6 is a flowchart illustrating an embodiment of determining whether to output an audio external output of FIG. 5.

Claims (13)

Receiving a data stream comprising a digital broadcast signal; Extracting audio channel information from the received data stream; Determining whether the audio signal is externally output using the extracted audio channel information; If the external output is determined, powering on an externally connected sound output device; And And transmitting the audio signal included in the data stream to the sound output device. The method of claim 1, wherein the determining step And determining an external output of the audio signal when the number of channels of the audio signal included in the data stream is greater than or equal to a reference value. The method of claim 1, wherein the determining step And receiving or not outputting the audio signal from a user when the number of channels of the audio signal included in the data stream is greater than or equal to a reference value. The method of claim 1, wherein the determining step And determining an external output of the audio signal when the audio signal included in the data stream is a Dolby or DTS signal. The method of claim 1, wherein the power on step And powering on the sound output device by using a Consumer Electronics Control (CEC) line of a high definition multimedia interface (HDMI) connected to the sound output device. The method of claim 1, wherein the power on step And digitally powering on the sound output device using a wired or wireless local area network (LAN) connected to the sound output device. The method of claim 1, And adjusting the setting of the sound output device by using the extracted audio channel information. The method of claim 7, wherein And adjusting the volume of the sound output device by using the audio channel information and the information about the viewing environment of the user. The method of claim 8, wherein the viewing environment information And receiving information about at least one of the user's current viewing volume and viewing time. A digital broadcasting apparatus which performs the method according to any one of claims 1 to 9. The method of claim 10, The digital broadcasting apparatus is a set-top box (STB) or a display apparatus. The method of claim 10, wherein the sound output device An imaging device connected to the digital broadcasting device using an HDML CEC line or a wired or wireless LAN; And And a speaker connected to the video device. A computer-readable recording medium having recorded thereon a program for executing the method according to any one of claims 1 to 9.

Images