KR100973938B1 - Broadcasting receiving apparatus and method - Google Patents

Abstract

PURPOSE: A broadcasting receiving device and a method is provided to receive a broadcasting signal of relevant SD(Standard Definition) type broadcasting channel according to channel list in case a selected sub screen broadcasting channel is a HD type broadcasting channel, thereby providing the broadcasting signal. CONSTITUTION: A storage unit(370) stores a channel list. A security system which can store a still image is provided to secure a video by video camera and secure a still image of high definition by continual photographing camera according to the event at the same time, thereby conveniently analyzing the event situation. The channel list comprises connecting information of a first resolution-type broadcasting channel and a second resolution-type broadcasting channel providing the same broadcasting program. If a selected sub screen broadcasting channel is a first HD type broadcasting channel, a control unit(330) receives a second HD type broadcasting channel as a sub screen broadcasting channel according to the channel list by controlling broadcasting receiver(310). A first HD is high definition higher than a second HD.

Description

Broadcast receiving apparatus and method {BROADCASTING RECEIVING APPARATUS AND METHOD}

The present invention relates to a broadcast receiving apparatus and method, and more particularly, to a broadcast receiving apparatus and method for receiving a broadcast signal of a broadcast channel selected from a user.

A user could receive and watch a broadcast signal transmitted by an analog method through an analog television, and watch only one broadcast channel at a time. However, with the development of technology, a user can watch a broadcast signal transmitted by a digital method through a digital television. It is possible to watch a broadcast of high quality by receiving it, and it is possible to simultaneously watch a plurality of broadcast channels through the PIP (Picture In Picture) function.

For this PIP function, the broadcast reception device may include two tuners and two decoders. However, when both decoders are equipped with high definition (HD) decoders, the price of the product is high. Therefore, it is common to have an HD decoder for the main picture and a standard definition (SD) decoder for the sub picture. Therefore, when the sub-screen broadcast channel selected by the user is a high-definition type broadcast channel such as HD, the SD decoder cannot process the HD broadcast channel signal and thus cannot display the image of the corresponding broadcast channel on the sub-screen.

An object of the present invention is to provide a broadcast receiving apparatus and method for receiving a broadcast signal of an SD type broadcast channel providing the same broadcast program and providing it as a sub picture when the broadcast channel selected for the sub picture is an HD type broadcast channel. It is.

The broadcast receiving apparatus according to the embodiment of the present invention for solving the technical problem, the broadcast receiving unit for receiving the broadcast signal of the main screen channel and the sub-screen channel, the first resolution type broadcast channel and the second broadcast program providing the same broadcast program A storage unit for storing a channel list including connection information of a resolution type broadcast channel; and when the broadcast channel selected for the sub-screen from the user is the first resolution type broadcast channel, the second resolution type broadcast is referred to with reference to the channel list. And a control unit controlling the broadcast receiving unit to select and receive a channel as a sub picture broadcast channel, and a decoding unit decoding the broadcast signal of the main picture channel and the broadcast signal of the sub picture channel.

The video processing unit may further include an image processor configured to generate and output a video signal of a main screen channel broadcast signal output from the decoding unit as a main screen and a sub picture channel broadcast signal.

The first resolution may be higher resolution than the second resolution.

The first resolution may be high definition (HD), and the second resolution may be standard definition (SD).

The decoding unit may include an HD decoder for decoding the broadcast signal of the main picture channel, and an SD decoder for decoding the broadcast signal of the sub picture channel.

The list indicates a node including information of a first resolution type broadcast channel and a second resolution type broadcast channel that provides the same broadcast program as the first resolution type broadcast channel in the form of a circular linked list. Can be.

When the main screen and the sub-screen are switched with each other, the controller selects and receives a second resolution type broadcast channel that provides the same broadcast program as the main screen channel before switching as the sub-screen broadcast channel with reference to the channel list. The broadcast receiver may be controlled.

According to an embodiment of the present invention, a broadcast receiving method includes receiving broadcast signals of a main picture channel and a sub picture channel, and connecting information of a first resolution type broadcast channel and a second resolution type broadcast channel for providing the same broadcast program. Storing a channel list that includes a second list, if the broadcast channel selected for the sub-screen from the user is the first resolution type broadcast channel, selecting the second resolution type broadcast channel as the sub-screen broadcast channel with reference to the channel list; And receiving the received signal, and decoding the broadcast signal of the main picture channel and the broadcast signal of the sub picture channel.

The method may further include generating and outputting a video signal in which the broadcast signal of the main picture channel decoded in the decoding step is used as the main picture and the broadcast signal of the sub picture channel is used as the sub picture.

The first resolution may be higher resolution than the second resolution.

The first resolution may be HD and the second resolution may be SD.

The decoding may include decoding a broadcast signal of the main picture channel, and decoding a broadcast signal of the sub picture channel.

The list indicates a node including information of a first resolution type broadcast channel and a second resolution type broadcast channel that provides the same broadcast program as the first resolution type broadcast channel in the form of a circular linked list. Can be.

If the main screen and the sub-screen are switched with each other, referring to the channel list, controlling to select and receive a second resolution type broadcast channel that provides the same broadcast program as the main screen channel before switching as the sub-screen broadcast channel; It may further include.

A computer-readable medium according to an embodiment of the present invention records a program for causing a computer to execute any one of the above methods.

As described above, according to the present invention, a channel in which all HD and SD type broadcast channels are received is connected with HD type broadcast channel information in the channel list and SD type broadcast channel information, so that the broadcast channel selected for the sub picture from the user is HD type broadcast. In the case of a channel, a broadcast signal of a corresponding SD type broadcast channel may be received and provided as a sub picture with reference to a channel list.

In addition, when the main screen and the sub-screen are switched with each other, if the main screen channel before the switching is an HD channel by referring to the channel list, the broadcast signal of the SD type broadcast channel providing the same broadcast program may be received and provided as the sub-screen. .

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

First, a broadcast system including a broadcast reception device according to an embodiment of the present invention will be described in detail with reference to FIG. 1.

1 is a block diagram illustrating a broadcast system including a broadcast reception device according to an embodiment of the present invention.

The broadcast receiving device 300 according to the embodiment of the present invention is connected to the broadcasting station 100 through the broadcasting network 200 to transmit and receive various broadcast signals, and is connected to the video reproducing apparatus 400 by wire or wireless to transmit and receive various signals. . Of course, the broadcast receiving device 300 and the image reproducing device 400 may be implemented in one form.

The broadcast receiving device 300 supports a picture in picture (PIP) function for simultaneously displaying a small screen separately from this screen and may be implemented as a set-top box. That is, the broadcast receiving device 300 may generate a video signal by simultaneously receiving broadcast signals of a plurality of broadcast channels selected by the user and by appropriately processing the user to simultaneously view the plurality of broadcast channels. Hereinafter, it is assumed that the broadcast reception device 300 displays two broadcast channels simultaneously on the screen. Among the two screens displayed on the screen, the entire screen is called the main screen, and the small screen included in the entire screen is called the subscreen.

The broadcasting network 200 is a communication network through which various broadcast signals are transmitted and received via wired or wireless, and include a cable network, a communication network used for terrestrial / airwave transmission, and a satellite communication network.

The broadcasting station 100 is a system for transmitting various broadcast contents, and transmits a terrestrial / airwave broadcasting signal, a cable broadcasting signal, a satellite broadcasting signal, and the like through the broadcasting network 200.

The image reproducing apparatus 400 represents a display apparatus such as a digital television or a monitor, and reproduces various signals transmitted from the broadcast receiving apparatus 300.

Next, a broadcast reception device according to an embodiment of the present invention will be described in more detail with reference to FIG. 2.

FIG. 2 is a block diagram illustrating the broadcast receiving apparatus shown in FIG. 1 in more detail.

The broadcast receiving device 300 includes a broadcast receiving unit 310, a control unit 330, a decoding unit 350, a storage unit 370, and an image processing unit 390.

The broadcast receiver 310 receives a broadcast signal such as a terrestrial / airwave broadcast signal, a cable broadcast signal, a satellite broadcast signal, and the like through the broadcast network 200. In particular, the broadcast receiving unit 310 according to an embodiment of the present invention includes at least two tuners (not shown), and may simultaneously receive broadcast signals of a main screen and a sub-screen channel selected by a user. Here, the main screen channel represents a broadcast channel displayed on the main screen and the sub screen channel represents a broadcast channel displayed on the sub screen.

The decoding unit 350 includes an HD decoder 351 and an SD decoder 355, and decodes the broadcast signals of the main picture and sub picture channels compressed by MPEC-21, H.264, VC-1, and the like. To print.

The HD decoder 351 decodes the broadcast signal of the main picture channel. That is, the HD decoder 351 performs appropriate processing on the broadcast signal of the HD (High Definition) or SD (Standard Definition) type broadcast channel displayed on the main picture and decodes it.

The SD decoder 355 decodes the broadcast signal of the sub picture channel. That is, the SD decoder 355 performs appropriate processing on the broadcast signal of the SD type broadcast broadcast channel displayed on the sub picture and decodes it.

The image processor 390 generates and outputs a video signal in which the broadcast signal of the main picture channel decoded by the decoder 350 is the main picture and the broadcast signal of the decoded sub picture channel is the sub picture.

The controller 330 controls the overall operation of the broadcast receiving device 300 and controls the broadcast receiving unit 310 to receive a broadcast signal of a broadcast channel selected by the user. In addition, the controller 330 decodes the broadcast signal received through the decoder 350, generates an image signal based on the broadcast signal decoded by the image processor 390, and transmits the image signal to the image reproducing apparatus 400.

When the broadcast receiving device 300 is driven for the first time, the controller 330 searches for a receivable channel to construct a channel database, generates a channel list using the constructed channel database, and stores a channel database and a channel list. . Here, the channel database represents a list of receivable channel information, and the channel list includes connection information between an HD type broadcast channel and an SD type broadcast channel providing the same broadcast program. The channel database and channel list are described in detail below.

The controller 330 controls the broadcast receiver 310 to receive a broadcast signal of a corresponding broadcast channel by referring to a channel list and a channel database when a broadcast channel for a main screen or a sub-screen is selected through a remote controller (not shown). . The controller 330 updates main or sub picture channel history information when a main channel or sub picture broadcast channel is selected by the user. Here, the main picture channel history information indicates a channel number list of the main picture broadcast channel selected by the user, and the sub picture channel history information indicates a channel number list of the sub picture broadcast channel selected by the user. When the main screen and the sub screen are switched by the user, the controller 330 may exchange the main screen channel history information and the sub screen channel history information with each other.

In particular, when the broadcasting channel selected for the sub-screen from the user is an HD-type broadcasting channel, the controller 330 selects the SD type broadcasting channel providing the same broadcast program as the HD-type broadcasting channel as the sub-screen broadcasting channel with reference to the channel list. The broadcast receiver 310 may be controlled to receive the data. In addition, when the main screen and the sub-screen are switched with each other, the control unit 330 broadcasts the SD type broadcast channel that provides the same broadcast program as the main screen channel before switching as the sub-screen broadcast channel by referring to the channel list. The receiver 310 may be controlled. For example, if the main screen channel is 9 and the sub screen channel is 2 before the screen change occurs, if the main screen and the sub screen are switched with each other, the SD type broadcast channel of channel 9 is referred to as a sub-screen broadcast channel by referring to the channel list. Select to receive the broadcast signal and display it on the screen.

The storage unit 370 stores various programs and data necessary for the operation of the broadcast receiving device 300. In particular, the storage unit 370 according to an embodiment of the present invention stores a channel database, a channel list, main screen channel history information, sub-screen channel history information, and the like.

As described above, when the broadcast channel selected by the user for the sub picture is an HD type broadcast channel, since only the SD type broadcast channel can be displayed on the sub picture conventionally, no image can be displayed, but the broadcast according to the embodiment of the present invention is performed. The reception device 300 connects the SD type broadcast channel information to a corresponding node of the channel list to the channel where all the HD and SD type broadcast channels are received, so that when the broadcast channel selected for the sub picture is the HD type broadcast channel, A broadcast signal of the corresponding SD type broadcast channel may be received and displayed on the sub-screen.

Next, the channel database and the channel list will be described in detail with reference to FIG. 3.

3 is a diagram illustrating an example of a channel database, and FIG. 4 is a diagram illustrating an example of a channel list.

When the broadcast reception device 300 is driven for the first time, the broadcast reception apparatus 300 searches for a receivable channel while scanning a frequency, and builds a channel database composed of receivable channel information as shown in FIG. 3. Although the channel information includes a channel number and a channel type, as shown in FIG. 3, this is for convenience of description and the channel information may further include a program ID, a source ID, frequency information, and the like. Here, the channel type indicates the type of broadcast signal of the corresponding channel such as HD, SD, Analog, program ID is a code for identifying a broadcast program provided by the channel, and source ID identifies a broadcaster that produced the broadcast program. This code is for indicating, and the frequency information indicates a frequency band in which the broadcast signal of the channel is transmitted. Referring to FIG. 3, in the case of channel numbers 1, 2, and 9, HD type and SD type broadcasting channels can be received, in the case of channel number 7, only HD type broadcasting channels can be received, and in case of channel numbers 3 and 10, respectively. It can be seen that only the SD type broadcast channel can be received.

The broadcast receiving device 300 generates a channel list including connection information between the HD type broadcast channel and the SD type broadcast channel providing the same broadcast program as shown in FIG. 4 using the constructed channel database. That is, the broadcast reception device 300 may represent a node including a channel number and HD type broadcast channel information in the form of a circular linked list based on a channel database. In this case, the broadcast receiving device 300 may connect the SD type broadcast channel information to the corresponding node when all of the HD and SD type broadcast channels are received with the same channel number. Here, the HD and SD type broadcast channel information represents a link indicating corresponding channel information stored in a channel database. Meanwhile, although the channel list is in the form of an annular linked list, as shown in FIG. 4, the present invention is not limited thereto and may be implemented in other forms.

Referring to FIG. 4, in the case of channel numbers 1, 2, and 9, since all HD and SD type broadcast channels can be received, the SD type broadcast channel information is connected to the corresponding node, but in the case of channel numbers 3 and 10, SD Since only the type broadcast channel can be received, the corresponding node consists only of the SD type broadcast channel information. In the case of channel number 7, only the HD type broadcast channel can be received. The reference sign MS is a main picture indicator indicating a channel selected by the user for the main picture. Channel 9 is selected as the main picture channel, and the reference sign SS is selected for the sub picture by the user. As the sub picture indicator indicating the channel, it can be seen that channel 2 is selected as the sub picture channel.

When the broadcast channel for the main screen or the sub-screen is selected through the remote controller or the like, the broadcast receiving device 300 searches for the corresponding channel information in the channel list using the channel number and updates the main screen or the sub-screen indicator. In particular, when a sub-screen broadcast channel is selected by the user, the broadcast reception device 300 may search for a corresponding SD type broadcast channel in a channel list using a channel number and receive a broadcast signal of the corresponding SD type broadcast channel. For example, if No. 1 is selected as the sub-screen broadcast channel, the node corresponding to the No. 1 channel is searched for in the channel list, the broadcast signal of the SD type broadcast channel connected to the corresponding node is received, and the sub-screen indicator is updated. .

As described above, the broadcast receiving apparatus 300 according to the embodiment of the present invention connects the SD type broadcast channel information to the corresponding node of the channel list to the channel where all HD and SD type broadcast channels are received, thereby allowing the sub-screen from the user. When the selected broadcast channel is an HD type broadcast channel, a broadcast signal of a corresponding SD type broadcast channel may be received with reference to a channel list. In addition, when the main screen and the sub-screen are switched with each other, the broadcast signal of the SD type broadcast channel providing the same broadcast program as the main screen channel before switching may be received with reference to the channel list.

Meanwhile, the decoder 350 has been described as including an HD decoder 351 and an SD decoder 355, respectively. However, according to an exemplary embodiment, the decoder 350 may determine the broadcast signal of the HD type broadcast channel and the SD type broadcast channel. One decoder may decode a broadcast signal at the same time. In this case, since the decoding unit 250 cannot simultaneously decode two HD type broadcast channels, the HD type broadcast channel is connected to the HD type broadcast channel and the SD type broadcast channel according to the present invention. If selected, it can be implemented to decode and output the broadcast signal of the SD type broadcast channel corresponding thereto.

Next, a broadcast reception method according to an embodiment of the present invention will be described with reference to FIG. 5.

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

First, when the broadcast reception device 300 is driven for the first time, the broadcast reception device 300 searches for a receivable channel to construct a channel database. The broadcast receiving device 300 generates a channel list including connection information between an HD type broadcast channel and an SD type broadcast channel providing the same broadcast program (S510). Here, the channel database represents a list of receivable channel information, and the channel list represents a node including a channel number and HD type broadcast channel information in the form of an annular connection list. Meanwhile, although the channel list has been described in the form of an annular linked list, the channel list is not limited thereto and may be implemented in other forms.

Subsequently, when a sub-screen broadcast channel is selected by the user through the remote controller (S520), the broadcast receiving device 300 determines whether the broadcast channel selected for the sub-screen from the user is an HD type broadcast channel in the case of an HD type channel. (S530-Y), the SD type broadcast channel providing the same broadcast program as the HD type broadcast channel is searched for with reference to the channel list (S540). The broadcast receiving device 300 receives the corresponding broadcast signal by selecting the searched SD type broadcast channel as a sub-screen broadcast channel (S550), decodes the broadcast signal of the received SD type broadcast channel (S560), and decodes the A video signal of the main picture channel as the main picture and the decoded sub picture channel of the broadcast signal as the sub picture is generated and output (S570).

On the other hand, if the broadcast channel selected for the sub picture from the user is not an HD type channel (S530-N), the broadcast signal of the corresponding broadcast channel is received and decoded (S550, S560), and the video is based on the decoded broadcast signal. A signal is generated and output (S570).

On the other hand, when the main screen and the sub-screen is switched by the user, the broadcast receiving device 300 performs the same steps (S530, S540, S550, S560, S570) described above.

So far, the HD type broadcast channel and the SD type broadcast signal have been described as an example. However, according to the development of technology, even when a broadcast signal having a higher resolution type than HD and SD is used, the broadcast reception device can be implemented by applying the concept according to the present invention. to be.

Embodiments of the invention include a computer readable medium containing program instructions for performing various computer-implemented operations. This medium records a program for executing the broadcast reception method described so far. The media may include, alone or in combination with the program instructions, data files, data structures, and the like. Examples of such media include magnetic media such as hard disks, floppy disks and magnetic tape, optical recording media such as CDs and DVDs, floppy disks and program commands such as magnetic-optical media, ROM, RAM and flash memory. Hardware devices configured to store and perform such operations. Alternatively, the medium may be a transmission medium such as an optical or metal wire, a waveguide, or the like including a carrier wave for transmitting a signal specifying a program command, a data structure, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

1 is a block diagram illustrating a broadcast system including a broadcast reception device according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating the broadcast receiving apparatus shown in FIG. 1 in more detail.

3 is a diagram illustrating an example of a channel database.

4 is a diagram illustrating an example of a channel list.

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

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

100: broadcasting station, 200: broadcasting network,

300: a broadcast receiving device, 310: a broadcast receiving unit,

330: control unit, 350: decoding unit,

351: HD decoder, 355: SD decoder,

370: a storage unit, 390: an image processing unit,

400: video playback device

Claims (15)

A broadcast receiver for receiving broadcast signals of a main screen channel and a sub-screen channel; A storage unit for storing a channel list including connection information between a first resolution type broadcast channel and a second resolution type broadcast channel providing the same broadcast program; If the broadcast channel selected from the user for the sub picture is the first resolution type broadcast channel, controlling the broadcast receiver to select and receive the second resolution type broadcast channel as the sub picture broadcast channel with reference to the channel list. Control unit, and A decoding unit for decoding the broadcast signal of the main picture channel and the broadcast signal of the sub picture channel; And the first resolution is higher resolution than the second resolution. In claim 1, And a video processing unit configured to generate and output a video signal of a main screen channel broadcast signal output from the decoding unit as a main screen and a sub picture of a broadcast signal of a sub picture channel. delete In claim 1, The first resolution is a high definition (HD), the second resolution is a standard definition (SD). In claim 1, The decoding unit, An HD decoder for decoding the broadcast signal of the main picture channel, and And a SD decoder for decoding the broadcast signal of the sub picture channel. In claim 1, The channel list may include a node including information of the first resolution type broadcast channel and a second resolution type broadcast channel that provides the same broadcast program as the first resolution type broadcast channel in the form of a circular linked list. The broadcast receiving device as shown. In claim 1, When the main screen and the sub-screen are switched with each other, the controller selects and receives a second resolution type broadcast channel that provides the same broadcast program as the main screen channel before switching as the sub-screen broadcast channel with reference to the channel list. And a broadcast reception device controlling the broadcast reception unit. Receiving broadcast signals of a main picture channel and a sub picture channel; Storing a channel list including connection information between a first resolution type broadcast channel and a second resolution type broadcast channel providing the same broadcast program; If the broadcast channel selected from the user for the sub picture is the first resolution type broadcast channel, controlling to select and receive the second resolution type broadcast channel as the sub picture broadcast channel with reference to the channel list; and Decoding the broadcast signal of the main picture channel and the broadcast signal of the sub picture channel; And the first resolution is higher than the second resolution. In claim 8, And generating and outputting a video signal of a main picture channel decoded in the decoding step as a main picture and a sub picture of a broadcast signal of a sub picture channel. delete In claim 8, And the first resolution is HD and the second resolution is SD. In claim 8, The decoding step, Decoding the broadcast signal of the main picture channel; and And decoding the broadcast signal of the sub picture channel. In claim 8, The channel list may include a node including information of the first resolution type broadcast channel and a second resolution type broadcast channel that provides the same broadcast program as the first resolution type broadcast channel in the form of a circular linked list. The broadcast receiving method as shown. In claim 8, If the main screen and the sub-screen are switched with each other, referring to the channel list, controlling to select and receive a second resolution type broadcast channel that provides the same broadcast program as the main screen channel before switching as the sub-screen broadcast channel; Broadcast receiving method further including. A computer readable medium having recorded thereon a program for causing a computer to execute the method of any one of claims 8, 9 and 11-14.

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