KR100745680B1 - Method for time shifting in multiple channel screen, and multi-channel receiving apparatus using the same - Google Patents

Abstract

The present invention relates to a multi-channel broadcast receiving apparatus. The multi-channel broadcast receiving apparatus according to the present invention comprises: a display unit for dividing one screen into a plurality of windows and simultaneously outputting broadcast data of different channels to each of the windows; A user interface unit receiving channel selection information corresponding to each of the windows and a time shift request signal of broadcast data being output through the window; A plurality of channels corresponding to each of the plurality of windows, receiving broadcast data to be output through the corresponding window based on the channel selection information, and performing time shift for the broadcast data based on the time shift request signal A data processor; A control unit for activating a window corresponding to the selection information and transmitting the selection information to the channel data processing unit corresponding to the window when the channel selection information or the time shift request signal is input through the user interface unit; And an image synthesizer for synthesizing image signals of channel-specific data output through the plurality of channel data processors. Accordingly, the present invention has the effect of performing time-shifting on each of a plurality of channels while simultaneously outputting the multi-channel broadcast in the multi-channel broadcast reception device for outputting a multi-channel simultaneous picture.

Broadcast, Time Shift, Multi-Channel, PIP, PIP, PVR

Description

Time-shifting method for each channel in multi-channel simultaneous screen and multi-channel broadcast receiving device using same

1 illustrates an example of a screen for simultaneously displaying multiple channels in a multi-channel broadcast receiving apparatus according to the present invention.

2 is a schematic block diagram of a multi-channel broadcast receiving apparatus supporting time-shifting for each channel in a multi-channel simultaneous picture according to the present invention.

FIG. 3 is a schematic block diagram of a channel data processor of the broadcast receiving device illustrated in FIG. 2.

4 is a flowchart illustrating a multi-channel broadcast reception method for performing time-shifting for each channel in a multi-channel simultaneous picture according to an embodiment of the present invention.

5A is a schematic block diagram of a multi-channel broadcast receiving apparatus of the present invention for receiving terrestrial broadcast data.

5B is a schematic block diagram of a multi-channel broadcast receiving apparatus of the present invention for receiving IP broadcast data.

* Description of the symbols for the main parts of the drawings *

200: multi-channel broadcast receiving device 210: user interface unit

220: control unit 230: channel data processing unit

240: video synthesizer 250: A / V decoder

260: display unit 270: speaker

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-channel broadcast reception apparatus and method for supporting time-shifting for each channel in a multi-channel simultaneous picture, and more particularly, to a picture in picture (PIP) or a personal video recorder (hereinafter referred to as a personal video recorder) The present invention relates to a multi-channel broadcast receiving apparatus and method for supporting time shifting for each channel after receiving and storing a multi-channel broadcast stream to perform a function called 'PVR'.

'PIP' refers to a 'picture in screen' and is a small screen displayed on a screen viewed from a broadcast receiver screen such as a television (aka, 'TV'), and is a screen displaying broadcast data of a channel different from the screen. In order to implement the 'PIP' function, a broadcast receiver such as a television or a set-top box selects a high frequency signal of a plurality of desired channels from a plurality of high frequency signals derived from an antenna and converts the demodulated signal into an intermediate frequency signal. To simultaneously output broadcast data of multiple channels on the screen of the television.

By using the 'PIP' function, users can check the contents of other channels while watching a specific program. Thus, most recent televisions have built in the 'PIP' function. However, the 'PIP' function is not used much because the user's preference is not large.

The reason is that there is a problem that the size of a specific screen is reduced due to the 'PIP' or a certain part of the screen is hidden. In addition, the absence of additional functions provided with the 'PIP' function (for example, a time shift function for a specific channel being simultaneously output) may also be an important cause of lowering the utilization of the PIP.

Meanwhile, 'PVR' is also called DVR (Digital Video Recorder), and refers to a product that stores and plays back digital video streams in real time with a built-in hard disk drive (HDD). Unlike the existing analog VCR tape, the 'PVR' digitally stores audio and video information to ensure picture quality without loss of information even if the recording and playback are repeated.

In addition, the 'PVR' provides a function (eg, a time-shift function) to store and re-display broadcast data in a hard disk in real time. Therefore, the user can stop the real-time broadcasting by using the 'PVR' or return the missed scene. For example, if a call is received while watching a specific broadcast program, the user may pause the broadcast program and then watch it. That is, the 'PVR' stores the broadcast stream received after the pause request in the hard disk in response to the user's pause request, and outputs the broadcast stream stored in the hard disk in response to the play request. . This allows the user to pause the broadcast stream being viewed and subsequently watch the broadcast stream after the paused screen at a desired time. In addition, the 'PVR' has a feature that enables reverse-playback and random-speed playback for live broadcasting by using the 'time shift' function.

However, since the 'PVR' cannot watch more than two channels at the same time, when the user changes the channel to be watched, all the existing broadcast channel data stored in the buffer are initialized and stored again, or the buffer corresponding to the plurality of channels. In order to store the data of each broadcasting channel in a corresponding buffer using multiple buffers, the buffers had to be switched in response to a channel change request.

As such, there is no conventional method of supporting time-shifting for each of the channels while simultaneously outputting the broadcast of the multi-channels. That is, in the related art, it is not possible to support time-shifting of a plurality of channels while outputting broadcast of multiple channels. This prevented users from time-shifting one or more channel data per channel. For example, in the related art, a user who is simultaneously watching a multi-channel broadcast cannot perform reverse playback and double speed playback for each channel.

In order to solve the above problems, the present invention provides a broadcast receiving apparatus and a method for performing time-shifting for each of a plurality of channels while simultaneously outputting multiple channels of broadcasts.

In addition, the present invention is to provide a broadcast receiving apparatus and a method capable of performing reverse playback and double speed playback for each of a plurality of channels being broadcasted while simultaneously outputting a multi-channel broadcast.

In order to achieve the above object, the multi-channel broadcast receiving apparatus provided by the present invention comprises: a display unit for dividing one screen into a plurality of windows and simultaneously outputting broadcast data of different channels to each of the windows; A user interface unit receiving channel selection information corresponding to each of the windows and a time shift request signal of broadcast data being output through the window; A plurality of channels corresponding to each of the plurality of windows, receiving broadcast data to be output through the corresponding window based on the channel selection information, and performing time shift for the broadcast data based on the time shift request signal A data processor; A control unit for activating a window corresponding to the selection information and transmitting the selection information to the channel data processing unit corresponding to the window when the channel selection information or the time shift request signal is input through the user interface unit; And an image synthesizing unit for synthesizing image signals of channel-specific data output through the plurality of channel data processing units.

In this case, it is preferable that the display unit displays a time index area for displaying current broadcasting time information compared to the total broadcasting time of the broadcasting program currently being output for each window in a predetermined region of the window.

The channel data processor may further include a broadcast data receiver configured to receive broadcast data corresponding to a corresponding channel based on pre-stored received channel information; A buffer unit for storing the received broadcast data and performing a time shift function on the broadcast data being output through a corresponding window based on a user's time movement request signal; And an MPEG decoder to decode broadcast data output from the buffer into MPEG data.

In addition, the broadcast data receiver is preferably composed of a tuner for receiving terrestrial broadcast data or a protocol processing module (IP / UDP / RTP) for receiving IP broadcast data.

In addition, the buffer unit stores time index information and time index information in the display area of the corresponding window, and based on the position change information of the time index in the time index area, the current reproduction of the broadcast data being output through the corresponding window. It is desirable to change the location or storage location.

In addition, the multi-channel broadcast reception method provided by the present invention in order to achieve the above object in the time-shifting method for each channel in the multi-channel simultaneous screen, initializes a variable for performing the time-shifting for each channel in the multi-channel simultaneous screen An initialization process; A channel and time index information management process of storing / managing channel and time index information for each window by using the initialized variable; A synthetic data output process of receiving broadcast data for each of the plurality of channels and synthesizing and outputting a video signal included in the broadcast data; A window selection information detecting process of detecting window selection information from the selection information when the channel selection information on the specific window or the time index selection information on the specific window is input; An activation process of activating a window corresponding to the window selection information; Changing a channel corresponding to the activated window if the input selection information is channel selection information; And a time index changing process of changing a time index corresponding to the activated window if the input information is time index selection information.

In this case, the initialization process may include a first variable CH_w including window identification information and channel information for setting a channel for each window; And the second variable TS_w including the window identification information and the time movement information for time movement by window.

In the process of outputting the synthesized data, it is preferable to combine the video signals included in the broadcast data so as to divide one screen into a plurality of windows and simultaneously display broadcast data of different channels in each of the windows.

In addition, the synthesis data output process preferably outputs only audio data included in broadcast data of a channel being output through one of the plurality of windows activated.

In the process of outputting the synthesized data, it is preferable to simultaneously display a time index area for displaying current broadcast time information with respect to the total broadcast time of the broadcast program currently being output for each window in a predetermined area of the window.

In the time index changing process, it is preferable to change the current playback position or the storage position of the broadcast data being output through the corresponding window based on the position change information of the time index in the time index region.

DETAILED DESCRIPTION A detailed description of preferred embodiments of the present invention will now be described with reference to the accompanying drawings. It should be noted that the same reference numerals and the same elements among the drawings are denoted by the same reference numerals and symbols as much as possible even though they are shown in different drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a diagram illustrating an example of a screen for simultaneously displaying multiple channels in a multi-channel broadcast receiving apparatus according to an embodiment of the present invention. Referring to FIG. 1, in the multi-channel broadcast receiving apparatus according to an exemplary embodiment, a single screen 100 may be divided into a plurality of partial display areas (for example, windows, hereinafter referred to as windows) 110. The broadcast data of the multi-channel is output at the same time by dividing the channels into 120, 130, and 140 and by mapping different channels to the respective windows. For example, four user defined channels are simultaneously output through the respective windows 110, 120, 130, and 140.

In addition, each of the windows 110, 120, 130, and 140 displays the time index regions 115, 125, 135, and 145 in a portion of the corresponding region. At this time, the time index area is an area for displaying current broadcast time information compared to the total broadcast time of the currently output broadcast program. In other words, the time index region indicates a current playback position or storage position among all broadcast data. To this end, each of the time index regions 115, 125, 135, and 145 displays time indexes 115a, 125a, 135a, and 145a for indicating the current playback position or storage position. Users can change the playback position of each channel by moving the time indexes 115a, 125a, 135a, and 145a within the time index regions 115, 125, 135, and 145.

As described above, the present invention simultaneously outputs multi-channel broadcast data through a plurality of windows 110, 120, 130, and 140, and displays the time indexes 115a displayed in the time index regions 115, 125, 135, and 145. , 125a, 135a, and 145a to display the current playback position and storage position of the channel.

Accordingly, users can simultaneously watch broadcast data of multiple channels using the broadcast receiving device of the present invention and control playback positions, speeds, and directions of respective channels. Meanwhile, a user must first assign a channel to each of the windows 110, 120, 130, and 140, or first select an active window among the windows 110, 120, 130, and 140 to use a time shift function.

2 is a schematic block diagram of a multi-channel broadcast receiving apparatus supporting time-shifting for each channel in a multi-channel simultaneous picture according to an embodiment of the present invention.

Referring to FIG. 2, the multi-channel broadcast receiving apparatus 200 according to an exemplary embodiment of the present invention may include a user interface unit (hereinafter referred to as “I / F”) 210, a controller 220, and a plurality of channel data. Channel data processor 230 and image synthesizer 240 including processing units (channel data processor 1 230a, channel data processor 2 230b, channel data processor 3 230c and channel data processor 4 230d). ), An audio / video decoder (hereinafter referred to as an 'A / V decoder') 250, a display unit 260, and a speaker 270.

The user I / F 210 provides an interface between the multi-channel broadcast receiving device 200 and the user. For example, it receives a user's operation signal for controlling the operation of the multi-channel broadcast receiving device 200 and transmits it to the controller 220. In particular, the user I / F 210 may use the multi-channel broadcast receiving apparatus 200 to display channel selection information of a user for channels to be received and a partial display area (eg, a window) to output selected channel data. It is preferable to receive the selection information and transmit it to the control unit 220. In addition, the controller receives the user's selection information (eg, window identification information and time index position information) for changing the playback position of the broadcast data for each channel in the time index region included in a part of the screen output through the windows. It is preferred to deliver to 220.

The controller 220 transmits the user's selection information input through the user I / F 210 to the channel data processor 230. In particular, the controller 220 may receive the channel selection information on the specific window or the time index selection information on the specific window through the user I / F 210, analyze the selection information, and transmit the selected information to the corresponding channel data processing unit. . For example, the controller 220 analyzes window identification information transmitted together with channel selection information or time index position information, determines a window to which display information is changed by the corresponding selection information, and then determines a channel data processing unit corresponding to the window. do. Preferably, the selection information is transmitted to the channel data processor.

The channel data processor 230 includes channel data processors having a maximum number of channels that can be simultaneously received by the multi-channel broadcast receiver 200. Each of the plurality of channel data processors includes one channel and its channel data. Corresponds to the window for output. The display information of the corresponding window is changed based on the control command transmitted through the control unit 220. For example, the channel data processor 230 changes the channel of the broadcast data being output through the corresponding window based on the channel selection information transmitted through the controller 220. In addition, when time index position information is transmitted through the controller 220, the channel data processor 230 changes the position of the time index of the corresponding window. The display information of the corresponding window is changed based on the change information.

FIG. 2 illustrates an example of the multi-channel broadcast receiving apparatus 200 that simultaneously receives four channel data and outputs the same through four windows. In this case, the multi-channel broadcast receiving apparatus 200 outputs data processed through each channel data processor through each of four divided screens as illustrated in FIG. 1.

1 and 2, the channel data processor 1 230a receives and processes broadcast data of a channel to be displayed through the first window 110 corresponding to the first window 110 of FIG. The processor 2230b receives and processes broadcast data of a channel to be displayed through the second window 120 corresponding to the second window 120 of FIG. 1, and the channel data processor 3230c of FIG. Receives and processes broadcast data of a channel to be displayed through the third window 130 in correspondence with the three windows 130, and the channel data processor 1230d corresponds to the fourth window 140 of FIG. The broadcast data of the channel to be displayed through the window 140 is received and processed.

The image synthesizer 240 downsizes the data for each channel processed through each of the channel data processors 230a, 230b, 230c, and 230d, and then synthesizes the corresponding images to generate one MPEG image. . In this case, the image synthesizing unit 240 may be manufactured as a separate module for downsizing the input images and composing them.

The A / V decoder 250 decodes an MPEG image output through the image synthesizing unit 240 and converts the MPEG image into a signal reproducible on a television. The converted signal is output through the display unit 260 or the speaker 270. In this case, the A / V decoder 250 preferably outputs multi-channel broadcasting video data synthesized into one video signal and audio data of one channel output through an activated window among the multi-channel broadcasting data.

The display unit 260 outputs video data output through the A / V decoder 250 (that is, video data obtained by combining a multi-channel video signal into one), and the speaker 270 is an A / V decoder 250. It outputs the audio data output through the (that is, audio data of one channel output through the active window).

FIG. 3 is a schematic block diagram of a channel data processor of the broadcast receiving device illustrated in FIG. 2. Referring to FIG. 3, the channel data processor 230 transmits broadcast data to a broadcast data receiver 231, a buffer 232, an MPEG decoder 233, a channel manager 234, and a time index manager 235. The control signal receiver 236 is included.

The broadcast data receiving unit 231 receives broadcast data corresponding to the reception channel among the data broadcast with the reception channel information and outputs the broadcast data. In this case, the broadcast data receiver 231 may be configured as a corresponding receiver according to the type of broadcast data to be received. For example, if the received broadcast data is terrestrial broadcast data, the broadcast data receiver 231 is configured as a tuner unit. If the received broadcast data is IP broadcast data, the broadcast data receiver 231 is configured as an RTP / UDP module.

In addition, the broadcast data receiver 231 may set or change the reception channel information based on channel information transmitted through the channel manager 234.

The buffer 232 stores broadcast data received through the broadcast data receiver 231. The buffer 232 preferably includes a time index processing module for performing a time shift function on the broadcast data. For example, the time index processing module stores time index area and time index information for each window, and displays a time index area for each window as illustrated in FIG. 1 and sets a time in the time index area based on user's selection information. Move the index. In addition, the buffer unit stores / manages the current playback position or storage position in the buffer for pausing and double-speed playback of the broadcast being output through the corresponding window based on the user's selection information.

For this purpose, the buffer 232 preferably uses time index management information transmitted through the time index manager 235.

The MPEG decoder 233 converts broadcast data stored in the buffer 232 into MPEG data and outputs the MPEG data. This is to be processed by the image synthesizer 230 described with reference to FIG. 2. That is, the image synthesizing unit 230 may combine the broadcast data received through other channels into a single image.

The control signal receiver 236 receives the control signal transmitted through the controller 220 illustrated in FIG. 2. If the control signal is a channel change signal, the control signal is transmitted to the channel manager 234. When the control signal is a time shift request signal, the control signal is transmitted to the channel manager 234. The control signal is transmitted to the time index manager 235.

The channel manager 234 detects channel information from the channel change signal received through the control signal receiver 236 and sets the channel information as a reception channel of the broadcast data receiver 231.

The time index manager 235 detects time index position information from the time shift request signal received through the control signal receiver 236, and then uses the position information to determine a reproduction or storage position of the broadcast data stored in the buffer 232. Manage.

4 is a flowchart illustrating a multi-channel broadcast reception method for performing time-shifting for each channel in a multi-channel simultaneous picture according to an embodiment of the present invention. That is, the process flow of the multi-channel broadcast receiving method using the multi-channel broadcast receiving apparatus of the present invention illustrated in FIGS. 2 and 3.

2 to 4, a method for receiving a multi-channel broadcast according to an embodiment of the present invention is as follows.

First, the control unit 220 of the multi-channel broadcast receiving apparatus 200 of the present invention sets parameters for channel setting and time shift for each window (S305). For example, the variable for setting channel per window is set to 'CH_w' and the variable for time shift is set to 'TS_w'. In this case, 'w' indicates window identification information, 'CH' indicates reception channel information of a corresponding window, and 'TS' indicates time movement information (ie, time index position information, etc.) of a corresponding window. .

In operation S310, a plurality of channel data are received and stored through the plurality of channel data processing units configured as illustrated in FIG. 3. That is, after receiving the data for each channel through the broadcast data receiving unit 231, the received channel data is stored in the corresponding buffer 232. In addition, the plurality of channel data are synthesized into one image (S315). To this end, each of the MPEG decoders 233 included in the plurality of channel data processing units 230 converts and outputs the received channel-specific data after MPEG conversion, and the image synthesizer 220 displays the respective MPEG decoders 233. It is preferable to downsize the MPEG data output from the synthesized image into one image.

In addition, the A / V decoder 450 receives the synthesized image and performs A / V decoding (S320), and then outputs a plurality of channel data through the display unit 460 and the speaker 470 (S325).

On the other hand, when the channel selection information for the specific window or the time index selection information for the specific window is input from the user, the control unit 220 detects the window selection information from the selection information and then processes the corresponding channel data processing unit 230. Pass the command. To this end, the controller 220 preferably stores matching information of a channel and a channel data processing unit for the channel for each window, and transmits the processing command to the corresponding channel data processing unit based on the stored information.

That is, when user selection information for executing a specific command is input (S330), the controller 220 detects window identification information from the selection information and activates a window corresponding to the detected window identification information (S335). The selection information is transmitted to the channel data processor matched with the window.

Then, the control signal receiving unit 236 of the channel data processing unit analyzes the selection information and requests whether the selection information is a signal for changing the reception channel of the window corresponding to the window or the time data of the corresponding channel data. Determine recognition (not shown).

When the selection information received as a result of the determination is a signal for changing the reception channel of the corresponding window (S340), the control signal receiver 236 transmits the channel change signal to the channel manager 234, and the channel manager 234 The channel corresponding to the selected window is changed based on the channel change signal (S345).

In addition, when the selection information received as a result of the determination is a time shift request signal of the broadcast data being output through the corresponding window (S350), the control signal receiver 236 transmits the time shift request signal to the time index manager 235. The time index manager 235 changes the time index corresponding to the selected window based on the time movement request signal (S355). That is, the reproduction and storage positions of the broadcast data being output through the selected window are changed based on the time shift request signal. For example, the read point of the buffer 232 is changed based on the location information included in the time shift request signal.

5A is a schematic block diagram of a multi-channel broadcast receiving apparatus 300 for receiving a terrestrial broadcast stream according to an embodiment of the present invention. Referring to FIG. 5A, the multi-channel broadcast receiving apparatus 300 receives a multi-channel terrestrial broadcast data and then performs a channel-specific data output unit 310 for performing channel-by-channel processing, and combines multi-channel image data into one. A synthesis unit 340, an A / V decoder 350 for A / V decoding the synthesized image data, a display unit 360 for outputting video data transferred from the A / V decoder 350, and an A / V decoder. And a speaker 370 for outputting audio data transmitted from the 350.

To this end, the channel-specific data output unit 310 is received from a plurality of tuners (311, 313, 315 and 317), each of the tuners (311, 313, 315 and 317) for receiving multi-channel terrestrial broadcast data MPEG decoders 331, 333 for MPEG conversion of a plurality of buffers 321, 323, 325, and 327 that store broadcast data and broadcast data output from the plurality of buffers 321, 323, 325, and 327, respectively. 335, 337).

In particular, in the example of FIG. 5A, the buffers 321, 323, 325, and 327 include a time index for indicating a playback position and a storage position of broadcast data stored therein. The read point is determined based on the index information, and the read data is transmitted to the MPEG decoder.

In the example of FIG. 5A, only components related to the flow of data among the multi-channel broadcast receiving apparatus 200 illustrated in FIGS. 2 and 3 are represented. That is, the components related to the transmission of the control signal are omitted. This is because the flow of the terrestrial broadcast stream is only described in FIG. 5A.

Meanwhile, the image synthesizer 340, the A / V decoder 350, the display 360, and the speaker 370 of FIG. 5A are the image synthesizer 240 and the A / V decoder 250 illustrated in FIG. 3, respectively. , Corresponding to each of the display unit 260 and the speaker 270, as described in the description with reference to FIG. 3. Therefore, detailed descriptions of the image synthesizer 340, the A / V decoder 350, the display 360, and the speaker 370 will be omitted.

5B is a schematic block diagram of a multi-channel broadcast receiving apparatus 400 for receiving an IP broadcast stream according to an embodiment of the present invention. Referring to FIG. 5B, the multi-channel broadcast receiving apparatus 400 receives a multi-channel IP broadcast data and then performs a channel-specific data output unit 410 for performing channel-by-channel processing, and combines the image data of the multi-channel into one. A synthesis unit 440, an A / V decoder 450 for A / V decoding the synthesized image data, a display unit 460 for outputting video data transferred from the A / V decoder 450, and an A / V decoder. And a speaker 470 for outputting audio data transmitted from 450.

To this end, the channel-specific data output unit 410 includes a plurality of RTP / UDP / IP modules 411, 413, 415, and 417 for receiving multi-channel terrestrial broadcast data, and the tuners 411, 413, 415, and 417. MPEG decoders for MPEG-converting broadcast data output from each of the plurality of buffers 421, 423, 425, and 427 and each of the plurality of buffers 421, 423, 425, and 427. (431, 433, 435, 437).

The multi-channel broadcast receiving apparatus 400 illustrated in FIG. 5B may recognize that only the channel data receiver differs from the multi-channel broadcast receiving apparatus 300 illustrated in FIG. 5A. And the operations of the corresponding devices are similar to each other. Therefore, a detailed description of the operation of each device will be omitted.

That is, in FIG. 5A, only a portion configured as a tuner for receiving terrestrial broadcast data is changed to an RTP / UDP / IP module in FIG. 5B to receive IP broadcast data. As described above, the present invention can be applied to all kinds of broadcast data by changing only the receiver of the channel data.

In the above detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims below, but also by those equivalent to the claims.

As described above, the present invention has the effect of performing time-shifting for each of a plurality of channels while simultaneously outputting the multi-channel broadcast in the multi-channel broadcast reception apparatus for outputting a multi-channel simultaneous screen. In particular, the present invention has the advantage that it is possible to perform reverse playback and double speed playback for each of a plurality of channels being broadcasted while simultaneously outputting multiple channels of broadcast. In addition, the present invention has the advantage that the input interface of the video signal can be mixed with the RF-tuner and IP-RTP / UDP can be applied to both the traditional cable set-top box and the current IP set-top box.

Claims (17)

A display unit for dividing one screen into a plurality of windows and simultaneously outputting broadcast data of different channels to each of the windows; A user interface unit receiving channel selection information corresponding to each of the windows and a time shift request signal of broadcast data being output through the window; A plurality of channels corresponding to each of the plurality of windows, receiving broadcast data to be output through the corresponding window based on the channel selection information, and performing time shift for the broadcast data based on the time shift request signal A data processor; A control unit for activating a window corresponding to the selection information and transmitting the selection information and the request signal to the channel data processing unit corresponding to the window when the channel selection information or the time shift request signal is input through the user interface unit; And And a video synthesizer for synthesizing video signals of data for each channel output through the plurality of channel data processors. The method of claim 1, And a speaker for outputting only audio data included in one broadcast data of each channel among the broadcast data for each channel output through the plurality of channel data processing units. The method of claim 2, wherein the speaker And outputs only audio data included in broadcast data of a channel being output through the activated one of the plurality of windows. The method of claim 1, wherein the display unit And displaying a time index area for displaying current broadcasting time information in relation to the total broadcasting time of the broadcasting program currently being output for each window, in a predetermined area of the window. The method of claim 1, wherein the channel data processing unit A broadcast data receiver configured to receive broadcast data corresponding to a corresponding channel based on previously received channel information; A buffer unit for storing the received broadcast data and performing a time shift function on the broadcast data being output through a corresponding window based on a user's time movement request signal; And And an MPEG decoder to decode broadcast data output from the buffer into MPEG data. The method of claim 5, wherein the broadcast data receiving unit A multi-channel broadcast receiving apparatus, characterized by comprising a tuner for receiving terrestrial broadcast data. The method of claim 5, wherein the broadcast data receiving unit And a protocol processing module (IP / UDP / RTP) for receiving IP broadcast data. The broadcast data receiving unit according to claim 6 or 7, wherein the broadcast data receiving unit And changing the reception channel information based on the channel selection information transmitted through the control unit. The method of claim 5, wherein the buffer unit  Stores the time index area and time index information among the display areas of the corresponding window, and stores or stores the current playback position of the broadcast data being output through the corresponding window based on the position change information of the time index in the time index area. A multi-channel broadcast reception device, characterized in that for changing the position. The method of claim 1, wherein the image synthesis unit And downsizing channel-specific data output through each of the plurality of channel data processing units and synthesizing the images included in each of the channel-specific data into a single image. An initialization process of initializing a variable for performing time-shifting for each channel in a multi-channel simultaneous picture; A channel and time index information management process of storing / managing channel and time index information for each window by using the initialized variable; A synthetic data output process of receiving broadcast data for each of the plurality of channels and synthesizing and outputting a video signal included in the broadcast data; A window selection information detecting process of detecting window selection information from the selection information when the channel selection information on the specific window or the time index selection information on the specific window is input; An activation process of activating a window corresponding to the window selection information; Changing a channel corresponding to the activated window if the input selection information is channel selection information; And And a time index changing process of changing a time index corresponding to the activated window if the input information is time index selection information. The method of claim 11, wherein the initialization process A first variable CH_w including window identification information and channel information for window-specific channel setting; And And a second variable (TS_w) including window identification information and time movement information for time movement by window. The method of claim 11, wherein the synthesis data output process is And dividing one screen into a plurality of windows and synthesizing the video signals included in the broadcast data so as to simultaneously display broadcast data of different channels in each of the windows. The method of claim 13, wherein the synthesizing data output process And downsizing the multi-channel broadcast data and synthesizing the images included in each of the broadcast data into a single image. The method of claim 13, wherein the synthesizing data output process And outputting only audio data included in broadcast data of a channel being output through the activated one of the plurality of windows. The method of claim 13, wherein the synthesizing data output process And displaying a time index area for displaying current broadcasting time information in relation to the total broadcasting time of the broadcasting program currently being output for each window in a predetermined area of the window. The method of claim 16, wherein the time index change process is performed. And changing the current playback position or the storage position of the broadcast data being output through the corresponding window based on the position change information of the time index in the time index region.

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