KR20100129000A - Apparatus and method for receiving a broadcasting signal - Google Patents

Apparatus and method for receiving a broadcasting signal Download PDF

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Publication number
KR20100129000A
KR20100129000A KR1020090047717A KR20090047717A KR20100129000A KR 20100129000 A KR20100129000 A KR 20100129000A KR 1020090047717 A KR1020090047717 A KR 1020090047717A KR 20090047717 A KR20090047717 A KR 20090047717A KR 20100129000 A KR20100129000 A KR 20100129000A
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KR
South Korea
Prior art keywords
channel
broadcast signal
tuner
received
receiving
Prior art date
Application number
KR1020090047717A
Other languages
Korean (ko)
Inventor
김동욱
Original Assignee
엘지전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to KR1020090047717A priority Critical patent/KR20100129000A/en
Publication of KR20100129000A publication Critical patent/KR20100129000A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H04N21/42607—Internal components of the client ; Characteristics thereof for processing the incoming bitstream
    • H04N21/4263—Internal components of the client ; Characteristics thereof for processing the incoming bitstream involving specific tuning arrangements, e.g. two tuners
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
    • H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/455—Demodulation-circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/50—Tuning indicators; Automatic tuning control

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

PURPOSE: An apparatus and a method for receiving a broadcasting signal are provided to perform a quick change over to a requested channel. CONSTITUTION: A first tuner(110) receives a broadcast signal of a first channel. A second tuner(120) receives a broadcast signal of a second channel. A decoder(130) decodes the received broadcast signal as described above. A controller(140) outputs an output signal of the first or second tuner to the decoder. In case the channel converting is requested to the second channel, the controller inputs the broadcast signal of the second tuner to the decoder.

Description

Apparatus and method for receiving a broadcasting signal

The present invention relates to an apparatus and a method for receiving a received digital broadcast signal.

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 broadcast receiving apparatus and method capable of efficiently receiving a digital broadcast signal that is being broadcast.

In accordance with another aspect of the present invention, a broadcast receiving device includes: a first tuner configured to receive a digital broadcast signal using a plurality of tuners and to receive a broadcast signal of a first channel being viewed; A second tuner for receiving a broadcast signal of a second channel; A decoder configured to receive the received broadcast signal, decode, and output the received broadcast signal; And a controller configured to select one of the output signals of the first and second tuners and output the selected signal to the decoder. When the channel switching to the second channel is requested, the controller is a broadcast signal received from the second tuner. Is controlled to be input to the decoder.

In a broadcast receiving method according to an embodiment of the present invention, using a first tuner and a second tuner of a plurality of tuners, respectively, simultaneously receiving a broadcast signal of a first channel and a broadcast signal of a second channel that a user is watching; ; Receiving a request for channel switching from a user; Determining whether the requested channel is the second channel; And decoding and outputting a broadcast signal of a second channel received by the second tuner when the channel requested to be switched is the second channel.

According to an embodiment of the present invention, by simultaneously receiving a broadcast signal of a channel currently being watched and a broadcast signal of another channel having a high likelihood of switching using a plurality of tuners, the user can quickly switch to a requested channel when a channel switch request is made by a user. The broadcast signal can be received, thereby reducing the channel switching consumption time of the digital broadcast receiver.

Hereinafter, a broadcast receiving apparatus and method according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating a configuration of a broadcast system for receiving and displaying broadcast signals.

Referring to FIG. 1, the broadcast reception device 100 receives a data stream including a broadcast signal through a satellite or a cable, and includes a video corresponding to a channel selected by a user from the received data stream. The audio data may be extracted and processed and then output to the display apparatus 200.

The broadcast receiving device 100 receives a broadcast signal through a wired or wireless network, converts the received broadcast signal into a form that can be output from the display device, and then outputs the set-top box to the display device 200. , STB).

However, the broadcast receiving device 100 according to the present invention is not limited to the set top box STB, and any type of device capable of receiving broadcast signals transmitted from the outside and outputting them to the display device 200 connected by wire or wireless connection. It may include.

The display apparatus 200 displays an image using a video signal input from the broadcast receiving apparatus 100. For example, the display apparatus 200 displays an image, for example, a liquid crystal display (LCD), a plasma display panel (PDP), an electro luminescent display (ELD), or a VFD. You can display images using various display methods such as (Vacuum Fluorescent Display).

In the case of digital broadcasting, 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 generate a data stream together with the compressed video and audio data to receive a 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 broadcast receiving device 100 extracts service information from a received data stream and separates various channel information therefrom, and video and audio data extracted from the data stream. It may include a decoder (not shown) for decoding the.

Meanwhile, the broadcast reception device 100 may be connected to the display device 200 through a high definition multimedia interface (HDMI), a digital visual interface (DVI), or a D-Sub cable. However, the connection between the broadcast receiving device 100 and the display device 200 is not limited to the above-described method, and may be connected using cables of various communication methods. In addition, the broadcast receiving device 100 and the display device 200 are not limited to being connected by wire, and may be connected through a wireless network using short-range wireless communication such as Zigbee, Bluetooth, or Wlan. .

Meanwhile, although FIG. 1 illustrates that the broadcast reception device 100 is provided as a separate device outside the display device, in another embodiment of the present invention, the broadcast reception device 100 is internal to the display device 200. It may be included in and implemented as a set.

2 is a block diagram illustrating a configuration of the broadcast reception device 100, and the illustrated broadcast reception device 100 may include tuners 110 and 120 and a decoder 130.

Referring to FIG. 2, the broadcast reception device 100 according to an embodiment of the present invention includes a plurality of tuners, that is, a first tuner 110 and a second tuner 120 respectively receiving broadcast signals of different channels. It may include.

For example, the first tuner 110 may extract a broadcast signal corresponding to a channel that the user is currently watching from a data stream received from an antenna (not shown) and output the broadcast signal to the decoder 130, and the second tuner ( 120 may extract and receive a broadcast signal corresponding to a specific channel different from the viewing channel from the data stream.

The decoder 130 decodes the broadcast signal of the viewing channel, more specifically, the video signal or the audio signal received by the first tuner 110 into data that can be reproduced by the display apparatus 200 and outputs the decoded data.

Meanwhile, the broadcast signal of the specific channel received by the second tuner 120 may be stored in a memory (not shown), thereby recording content broadcasted in a channel other than the channel currently being watched and simultaneously recorded. .

In addition, when a channel switch is requested, for example, when a user selects a second channel different from the first channel currently being viewed, the first tuner 110 receiving the broadcast signal of the first channel is requested. Channel switching may be performed to receive the broadcast signal of the second channel.

By the channel switching operation of the first tuner 110 as described above, a certain delay occurs from the point of channel switching request of the user to the point of channel switching of the actually received broadcast signal. In the case of digital broadcasting, it may increase greatly from 2 seconds to 4 seconds.

3 is a block diagram illustrating a configuration of a broadcast receiving apparatus according to an embodiment of the present invention. The broadcast receiving apparatus illustrated in FIG. 3 includes first and second tuners 110 and 120, a controller 140, and a decoder 130. It may include.

Referring to FIG. 3, the first tuner 110 may receive a broadcast signal of a channel currently being watched by a user, and the second tuner 120 may extract and receive a broadcast signal of a specific channel different from the watch channel. .

According to an embodiment of the present invention, the channel of the broadcast signal received by the second tuner 120 may be the channel most likely to be switched by the user in the current state, and the reception channel of the second tuner 120 may be It may be changed and set according to a channel currently being watched, that is, a reception channel of the first tuner 110.

The controller 140 may select one of the output signals of the first and second tuners 110 and 120 and output the selected signal to the decoder 130, and the decoder 130 according to the selection of the controller 140. The broadcast signal received by one of the first and second tuners 110 and 120 may be decoded and output.

That is, when the controller 140 selects the output signal of the first tuner 110, the broadcast signal received by the first tuner 110 is decoded and output by the decoder 130, and the controller 140 outputs the second signal. When the output signal of the tuner 120 is selected, the broadcast signal received by the second tuner 110 may be output after being decoded by the decoder 130.

To that end, the controller 140 may include a switching unit (not shown) for selecting any one of the output signals of the first and second tuners 110 and 120.

More specifically, when there is no channel switch request by the user, the controller 140 controls the broadcast signal of the current viewing channel received by the first tuner 110 to be input to the decoder 130.

If there is a request for switching to a channel received by the second tuner 110, the controller 140 controls the broadcast signal received from the second tuner 110 to be input to the decoder 130, thereby switching. The broadcast signal of the requested channel may be decoded to the decoder 130 and then output to the display apparatus 200.

As described above, the controller 140 controls the broadcast signal received from the second tuner 120 to be input to the decoder 130 when the channel is switched, so that a separate channel switching operation is performed by the tuner when the user requests channel switching. The user may receive the broadcast signal of the channel requested by the user and output the broadcast signal to the display apparatus 200.

4 is a flowchart illustrating a broadcast receiving method according to an embodiment of the present invention. An operation of the broadcast receiving apparatus shown in FIG. 3 will be described in detail with reference to FIG. 4.

Referring to FIG. 4, the first tuner 110 receives a broadcast signal of a first channel that the user is currently watching, and at the same time, the second tuner 120 broadcasts a broadcast signal of a second channel different from the first channel. Receive

As described above, in order to quickly switch to the requested channel by inputting the broadcast signal received from the second tuner 120 to the decoder 130 when the user requests a channel switch, the second tuner The second channel received by the 120 may be set to a channel most likely to be switched in the current state in consideration of viewing information, for example, the current viewing channel, previous channel switching information, or the user's preference.

More specifically, the second channel received by the second tuner 120 may be any one of two channels vertically adjacent to the first channel, which is the viewing channel received by the first tuner 110. That is, when the number of the first channel which is the viewing channel is channel 3, the number of the second channel received by the second tuner 120 may be channel 4 or channel 2.

For example, if the user has previously switched to the first channel currently being watched by pressing the "channel UP button" (a button that switches the channel by increasing the channel number by 1), continue pressing the "channel UP button" Since channel switching is more likely, the second channel received by the second tuner 120 may be a channel having a channel number 1 greater than that of the first channel.

On the other hand, if the user has previously switched to the first channel currently being watched by pressing the "channel DOWN button" (a button for switching the channel by decreasing the channel number by 1), the channel switching is continued by pressing the "channel DOWN button". Since the second channel is more likely to be, the second channel received by the second tuner 120 may be a channel having a channel number of 1 less than that of the first channel.

The controller 140 may determine the channel of the broadcast signal to be received by the second tuner 120 using the information on the channel currently being viewed and the channel switching performed by the user as described above. The second tuner 120 may control to receive the broadcast signal.

In addition, the second channel received by the second tuner 120 may be a channel watched by the user before the first channel, which is the current viewing channel. That is, when the user watches channel 3 and then switches to channel 8 and is currently watching, the channel of the broadcast signal received by the second tuner 120 may be channel 3 that the user has previously watched.

For example, if the user has previously switched to the first channel currently being watched by using the "channel number input button" or the "broadcast channel list" which sorts a plurality of channels on air, the user switches back to the previously watched channel. Since the second channel is more likely to be received, the second channel received by the second tuner 120 may be a channel that the user was watching before the first channel.

On the other hand, if the user has previously switched to the first channel currently being watched by pressing the "channel DOWN button" (a button for decreasing the channel number by 1) to continue to press the "channel DOWN button", the channel Since the possibility of switching is high, the second channel received by the second tuner 120 may be a channel having a channel number of 1 smaller than that of the first channel.

The controller 140 may determine a channel of the broadcast signal to be received by the second tuner 120 by using viewing history information, which is information on channels previously watched by a user, and transmits the broadcast signal of the determined channel. The second tuner 120 may control the reception.

In addition, the second channel received by the second tuner 120 may be set by the user in advance or may be set to, for example, a channel that the user has watched most recently according to the user's preference.

When receiving a request for channel switching from the user (step 310), the controller 140 determines whether the channel requested for switching by the user is the second channel being received by the second tuner 120 (step 320).

As a result of the determination, when the channel requested to be switched is the second channel, the broadcast signal of the second channel received by the second tuner 120 is input to the decoder 130 under the control of the controller 140 and is decoded. The unit 130 decodes and outputs the input broadcast signal of the second channel (step 330).

In addition, when channel switching is completed as described above, the controller 140 may determine a channel of the broadcast signal to be received by the first tuner 110 while the second channel is being viewed.

For example, the channel of the broadcast signal to be received by the first tuner 110 may be one of two channels vertically adjacent to the second channel, which is the current viewing channel, or the first channel, which is a previously viewed channel. . A detailed description of the method of determining the channel of the broadcast signal to be received by the first tuner 110 by the controller 140 may be the same as the method of determining the second channel as described above, and thus will be omitted below.

On the other hand, if the channel requested to be switched by the user is not the second channel, the controller 140 switches the reception channel of the first tuner 110 to the requested channel (step 340).

For example, a data stream for digital broadcasting may include service information (SI), more specifically, a broadcast description table (SDT), a program association table (PAT), and a program map table. (PMT, Program Map Table) may be included.

In order to switch the first tuner 110 to the requested channel in step 340, the first tuner 110 locks a frequency corresponding to the corresponding channel to provide service information (SI) for the requested channel. Is extracted from the data stream, and the received service information (SI) is parsed to receive the modified video and audio stream of the requested channel.

When the reception channel switching operation of the first tuner 110 is completed as described above, the controller 140 allows the broadcast signal of the user request channel received from the first tuner 110 to be input to the decoder 130. The decoder 130 may decode and output the broadcast signal of the channel requested by the user (step 350).

As described above, as the reception channel of the first tuner 110 is changed in operation 350, the channel of the broadcast signal received by the second tuner 120 may also be changed. The detailed method of changing the reception channel of the second tuner 120 may be the same as the method of the controller 140 changing the reception channel of the second tuner 120 according to the current viewing channel as described above. Let's do it.

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 the broadcast reception method may be easily inferred by programmers in the art to which the present invention belongs.

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 broadcast system for receiving and displaying digital broadcast signals.

2 is a block diagram showing the configuration of a broadcast receiving apparatus.

3 is a block diagram illustrating a configuration of a broadcast receiving apparatus according to an embodiment of the present invention.

4 is a flowchart illustrating a broadcast receiving method according to an embodiment of the present invention.

Claims (9)

In the broadcast receiving apparatus for receiving a digital broadcast signal using a plurality of tuners (tuners), A first tuner for receiving a broadcast signal of a first channel being watched; A second tuner for receiving a broadcast signal of a second channel; A decoder configured to receive the received broadcast signal, decode, and output the received broadcast signal; And A control unit for selecting one of the output signals of the first and second tuners and outputting the selected signal to the decoder; And when the channel switching to the second channel is requested, the controller controls the broadcast signal received by the second tuner to be input to the decoder. The method of claim 1, And the second channel is changed according to the first channel currently being viewed. The method of claim 1, And the second channel is any one of two channels vertically adjacent to the first channel or a channel viewed before the first channel. The method of claim 1, And the second channel is a user's preferred channel. The method of claim 1, And when the channel switching from the first channel to the second channel is requested, the first tuner switches to a third channel to receive a broadcast signal. The method of claim 5, And the third channel is the same as the first channel or a channel having a channel number obtained by adding or subtracting 1 to the number of the second channel. The method of claim 1, And when the channel switching to the fourth channel different from the second channel is requested, the controller controls one of the first and second tuners to switch to the fourth channel to receive a broadcast signal. In the method for receiving a digital broadcast signal using a plurality of tuners (tuners), Receiving a broadcast signal of a first channel and a broadcast signal of a second channel simultaneously by a user using a first tuner and a second tuner of the plurality of tuners, respectively; Receiving a request for channel switching from a user; Determining whether the requested channel is the second channel; And If the channel requested to be switched is the second channel, decoding and outputting a broadcast signal of a second channel received by the second tuner. The method of claim 8, And when the switch request channel is not the second channel, converting one of the first and second tuners into the switch request channel.
KR1020090047717A 2009-05-29 2009-05-29 Apparatus and method for receiving a broadcasting signal KR20100129000A (en)

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KR1020090047717A KR20100129000A (en) 2009-05-29 2009-05-29 Apparatus and method for receiving a broadcasting signal

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KR20100129000A true KR20100129000A (en) 2010-12-08

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