KR100830430B1 - Multi mode service receiver used sub-image of digital television - Google Patents

Abstract

An MMS(multi mode service) receiver of a digital TV is provided to show MMS through a sub image while displaying a main image and to rapidly switch MMS of the sub image into the main image if desired. An MMS receiver a digital TV having a first tuner and a second tuner(20) comprises an MMS broadcasting information receiver(32), an MMS processing unit(34), a PIP(picture in picture) processor(24), a storage(36), and a control unit(12). The MMS broadcasting information receiver receives MMS broadcasting information from the broadcasting signal received from the second tuner. The PIP processor processes the multimedia information on the sub image. The control unit receives the broadcasting signal through the MMS broadcasting information receiver, outputs the broadcasting signal on the sub image, and stores the multimedia information in the storage. A GUI(Graphical User Interface) unit(38) outputs the multimedia information to the PIP processor when the information is text information.

Description

MMS service receiver through sub-screen of digital television {MULTI MODE SERVICE RECEIVER USED SUB-IMAGE OF DIGITAL TELEVISION}

1 is a block diagram schematically illustrating an image processing system of a television having a sub-screen display function by a general picture-in-picture (PIP) mode.

2 is a block diagram illustrating an MMS service receiving apparatus through a sub-screen of a digital television according to an embodiment of the present invention.

   -Explanation of symbols for the main parts of the drawings-

10: remote controller 12: control unit

14: Tuning data memory 16,20: 1st, 2nd tuner

18, 22: first and second video / audio IF processing unit

24: PIP processing section 26: PIP switching output section

28: video / audio processor 30: CRT device

32: MMS broadcast information receiver 34: MMS service processor

36: storage unit 38: GUI unit

The present invention relates to an MMS service receiving apparatus through a sub-screen of a digital television, and more particularly, through a sub-screen by grasping an MMS service reception state through a separate tuner for a sub-screen while watching a main screen on a digital television. The present invention relates to an MMS service receiving apparatus through a sub-screen of a digital television that not only provides an MMS service but also quickly switches to a corresponding MMS service based on decoded information when switching to a main screen.

The digitalization of information spread from the computer industry to the information and communication industry has recently been extended to television broadcast signals. Digitization of television broadcast signals will realize a two-way multimedia era in which a new paradigm that is fused with technology in the computer and communication fields is realized.

Digital broadcasting is centered around the European Digital Video Broadcasting (DVB) standard and the ATV (Advanced TV) standard of the US FCC. It complies with the ATSC standard that the United States decided as the next generation TV method, replacing the NTSC standard that symbolizes the existing analog TV.

The difference between digital television and traditional analog television is divided into picture quality, sound quality, aspect ratio and others as follows.

First, in terms of image quality, an analog TV using 525 horizontal scanning lines has a horizontal resolution of about 330 lines that determines viewing quality, whereas a high definition (HD) digital TV has a horizontal resolution of about 700 lines. It is more than twice as clear as the TV.

In terms of sound quality, conventional analog TVs provide only two channels of stereo sound, while digital TVs using AC3 technology provide 5.1 channels of stereo sound that can be enjoyed in theaters.

In terms of the aspect ratio, the conventional analog TV has an aspect ratio of 4 to 3, whereas digital TVs have a wide aspect ratio of 16 to 9, similar to a theater screen.

What distinguishes digital TV from analog TV is not only a dramatic change in picture quality and sound quality. Digital TVs are data compatible with serial interfaces implemented via IEEE 1394 interface technology, such as digital versatile disc (DVD) players, digital camcorders, and digital VCRs that process digital signals as well as PCs.

Therefore, digitalization of broadcast signal will accelerate the convergence of communication, computer, and broadcasting due to the spread of media using the compressor method, and will be internationalized and multi-channel as a single media with complex functions. Above all, introducing a digital system to a broadcast signal can provide various data services that could not be realized in analog. In addition, the digitization of the broadcast signal may be performed by multiplexing and transmitting information in the vertical retrace period of the TV video signal or by using a separate channel, such as character information, image information, product information, and broadcast program information for a television or computer owner (aka electronic). Data broadcasting, a new media service that provides multimedia information such as an Electronic Program Guide (EPG), can be implemented.

On the other hand, PIP (picture in picture) which adopts a plurality of tuners and displays a small screen (sub picture) at the same time separately from the screen (main screen) which saw the video signal of each channel tuned by the tuner. The function is commonly used.

1 is a block diagram schematically illustrating an image processing system of a television having a sub-screen display function by a general picture-in-picture (PIP) mode.

As shown here, the remote control unit 10 transmits a remote control signal for selectively executing the overall functions of the television, and the control unit 12 controlling the execution of a function corresponding to the remote control signal transmitted from the remote control unit 10. ), And tuning data for the entire channel selectable from the television is stored and accessed by the control section 12.

Then, the first tuner 16 which performs the tuning of the channel corresponding to the tuning data VT1 applied from the control unit 12 and the video signal component of the channel tuned by the first tuner 16 are predetermined. A first video IF processing unit 18 for IF conversion processing by frequency, a second tuner 20 for performing channel tuning corresponding to the channel selection data VT2 applied from the control unit 12, and a second tuner ( And a second video IF processing unit 22 for IF converting the video signal components of the channel selected by 20) by a predetermined intermediate frequency.

In addition, when the PIP mode is set, the video IF signal selected by the second tuner 20 in response to the PIP control signal applied from the control unit 12 and applied by the second video IF processing unit 22 may be compressed. The sub picture signal processed by the PIP processing part 24 by timing matching with the switching signal S / W of the sub picture signal applied from the controller 12 in the PIP mode and the PIP processing part 24 processing as the sub picture signal. PIP switching output section 26 for switching output.

Then, only the image IF signal processed by the first image IF processor 18 is reproduced and applied to the CRT device 30 so as to be reproduced or when the PIP mode is set, the image IF signal processed by the first image IF processor 18 is set. And an image processing unit 28 for mixing the sub picture signal outputted from the PIP switching output unit 26 to a predetermined position and applying the same to the CRT device 30 to reproduce it.

Therefore, when a specific channel number is designated by the remote controller 10 in the state where the PIP mode is not set by the remote controller 10, the control unit 12 selects the tuning data VT1 for the channel number of the tuning target. ) Is applied to, for example, the first tuner 16, so that the image signal component of the channel tuned by the first tuner 16 is IF converted by the first image IF processor 18 to perform image conversion. Is reproduced by the R / G / B color component, and the reproduced video signal is applied to the CRT device 30 for reproduction.

In this way, while the video signal of the channel tuned by the first tuner 16 is reproduced to the CRT device 30, the remote control signal for setting the PIP mode from the remote controller 10 and the channel number of the PIP mode are transmitted. The ground controller 12 accesses the tuning data VT2 corresponding to the channel number from the tuning data memory 14 to the second tuner 20 and applies the PIP control signal to the PIP processing unit 24. do. Therefore, the image signal component of the channel tuned by the second tuner 20 is IF converted by the second image IF processor 22 and applied to the PIP processor 24, and the PIP processor 24 is the second image. The image IF signal applied by the IF processor 22 is compressed to a sub-screen size and applied to the PIP switching output unit 26.

Then, the PIP switching output unit 26 is timing-matched to the switching signal S / W of the sub picture signal applied from the control unit 12 and outputs to the image processing unit 28. Accordingly, the image processing unit 28 The video signal of the channel tuned by the first tuner 16 is processed as a main picture signal, and the video signal of the channel tuned by the second tuner 20 is processed as a sub picture signal to be output to the CRT apparatus 30. do.

The process of receiving an image output from an external video device and displaying it as a sub-screen is also applied to the PIP processing unit 24 and compressed to the size of the sub-screen so that the main screen is processed by the PIP switching output unit 26 by the image processing unit 28. Overlaid and output.

On the other hand, in digital television, MMS (Multi Mode Service) is provided which splits one channel band (6MHz) for digital broadcasting into multiple channels to output high definition (HD) channels, standard definition (SD) channels, and audio channels. .

However, in order to watch the above MMS service, first, after switching to the basic channel and selecting the minor channel provided in the multi-channel in the basic channel to use the corresponding MMS service.

In other words, if a football live broadcast is provided on channel 9, soccer rebroadcast on 9-1, audio broadcast on channel 9-2, and data broadcast on channel 9-3, channel 9-2 is selected to select channel 9-2. You need to switch to 2 to watch.

However, the multimedia information and the channel up / down by the ever-changing MMS service can not confirm the existence of the channel was inconvenient to automatically search the channel every time.

In addition, when the MPEG decoder is not embedded in the second image IF processor 22 for the sub picture, there is a problem that MMS service cannot be provided through the sub picture.

The present invention was created to solve the above problems, and an object of the present invention is to grasp MMS service reception status through a separate tuner for sub-screen while watching the main screen on a digital television, and to receive the MMS service through the sub-screen. In addition, the present invention provides an MMS service receiving apparatus through a sub-screen of a digital television that is quickly switched to a corresponding MMS service based on decoded information when switching to a main screen.

The present invention for achieving the above object is a digital television having a first tuner for the main picture processing and a second tuner for the sub-screen processing, MMS in the broadcast signal received through the second tuner for the sub-screen processing Receiving broadcast information MMS broadcast information receiver, MMS service processor for processing multimedia information according to MMS broadcast information received from MMS broadcast information receiver, PIP for processing multimedia information processed by MMS service processor as sub-screen A processing unit, a storage unit for storing the multimedia information received by the MMS broadcast information receiver, and a MMS service processor according to the multimedia information by receiving a received broadcast signal through the MMS broadcast information receiver by outputting channel selection data to the second tuner. MMS service is processed through to control the output to the sub-screen through the PIP processing unit and MMS That comprising a controller for storing the multimedia information received via the transmitter information receiver in the storage unit is characterized.

In the present invention, the MMS broadcast information receiver is characterized in that the MPEG decoder.

In the present invention, the multimedia information stored in the storage unit is maintained even when switched to the main screen.

In the present invention, if the multimedia information received from the MMS broadcast information receiving unit under the control of the text information is characterized in that it further comprises a GUI for text processing to output to the PIP processing unit.

The present invention thus made can receive MMS broadcast information through a second tuner for the sub picture while watching the main picture, and can process the received multimedia information to provide the MMS broadcast to the sub picture without switching channels directly. In the sub screen, MMS service can be searched and easily switched.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings, and the same parts as in the prior art use the same reference numerals and names. In addition, the present embodiment is not intended to limit the scope of the present invention, but is presented by way of example only and those skilled in the art will be capable of many modifications within the technical spirit of the present invention.

2 is a block diagram illustrating an MMS service receiving apparatus through a sub-screen of a digital television according to an embodiment of the present invention.

The MMS service receiving apparatus through the sub-screen shown in the drawing receives the MMS service through the sub-screen of a general digital television having a first tuner 16 for main screen processing and a second tuner 20 for sub-screen processing. Configured to do so. ,

That is, the MMS broadcast information receiver 32 and the MMS broadcast information receiver 32 receive MMS broadcast information from the broadcast signal received through the second tuner 20 for sub-picture processing. The MMS service processor 34 for processing multimedia information, the PIP processor 24 for processing the multimedia information processed by the MMS service processor 34 as a sub picture, and the multimedia received from the MMS broadcast information receiver 32 A storage unit 36 for storing information and a broadcast signal received by outputting channel selection data to the second tuner 20 are received through the MMS broadcast information receiver 32, and according to the multimedia information, the MMS service processor 34 A control unit 12 for processing the MMS service and outputting the sub screen through the PIP processing unit 24 and storing the multimedia information received through the MMS broadcasting information receiving unit 32 in the storage unit 36; , Control If the multimedia information received from the MMS broadcast information receiving unit 32 under the control of the unit 12 is text information, a GUI unit 38 for text processing to output to the PIP processing unit 24 is included.

At this time, the MMS broadcast information receiver 32 is composed of an MPEG decoder, and the multimedia information stored in the storage unit 36 is maintained even when switching to the main screen so that it can be quickly switched when switching from the sub-screen to the main screen.

Therefore, when the channel is tuned through the first tuner 16 and the main screen is activated while the subscreen is activated to search for the MMS service through the subscreen, the channel tuner data is output to the second tuner 20 so as to retrieve the channel. After tuning, MMS broadcast information received through the MMS broadcast information receiver 32 is received.

According to the MMS broadcast information received as described above, the multimedia broadcast is processed through the MMS service processor 34 for a multimedia broadcast, an audio broadcast, or a text broadcast through a minor channel.

In this case, the text information by text broadcasting is displayed by reconfiguring the screen through the GUI unit 38 and outputting the text broadcasting to the PIP processing unit 24 by the controller 12.

The MMS broadcast received as described above is processed through the MMS service processor 34 and the PIP processor 24 outputs the sub-screen as a sub-screen.

In addition, when the received MMS broadcast information is stored in the storage unit 36 and the MMS service displayed on the sub-screen is to be switched to the main screen, the channel is quickly decoded through the data of the storage unit 36 which is already decoded and stored. do.

As described above, the present invention, while watching the main screen on the digital television, grasps the MMS service reception status through a separate tuner for the sub-screen, and provides the MMS service through the sub-screen as well as decoded information when switching to the main screen. Based on this, there is an advantage of being quickly switched to the corresponding MMS service.

Claims (4)

In a digital television having a first tuner for main picture processing and a second tuner for sub picture processing, An MMS broadcast information receiver for receiving MMS broadcast information from the broadcast signal received through the second tuner for the sub-screen processing; An MMS service processor for processing multimedia information according to the MMS broadcast information received by the MMS broadcast information receiver; A PIP processor configured to process the multimedia information processed by the MMS service processor as the sub-screen; A storage unit for storing the multimedia information received by the MMS broadcast information receiver; Outputs channel selection data to the second tuner and receives a received broadcast signal through the MMS broadcast information receiver to process an MMS service through the MMS service processor according to the multimedia information to the sub-screen through the PIP processor. A controller for controlling the output and storing the multimedia information received through the MMS broadcast information receiver in the storage unit; MMS service receiving apparatus through a sub-screen of a digital television, characterized in that made. The MMS service receiving apparatus of claim 1, wherein the MMS broadcast information receiver is an MPEG decoder. The apparatus of claim 1, wherein the multimedia information stored in the storage unit is maintained even when the main screen is switched to the main screen. The digital television of claim 1, further comprising a GUI unit configured to process text and output the text information to the PIP processor when the multimedia information received by the MMS broadcast information receiver is text information under the control of the controller. MMS service receiving device through sub-screen.

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