KR20090018368A - Method for receiving dmb signal capable of dual-dispaly and dmb receiver using the same - Google Patents

Method for receiving dmb signal capable of dual-dispaly and dmb receiver using the same Download PDF

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Publication number
KR20090018368A
KR20090018368A KR1020070082763A KR20070082763A KR20090018368A KR 20090018368 A KR20090018368 A KR 20090018368A KR 1020070082763 A KR1020070082763 A KR 1020070082763A KR 20070082763 A KR20070082763 A KR 20070082763A KR 20090018368 A KR20090018368 A KR 20090018368A
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KR
South Korea
Prior art keywords
broadcast signal
dmb
dmb broadcast
signal
video signal
Prior art date
Application number
KR1020070082763A
Other languages
Korean (ko)
Inventor
주행식
Original Assignee
주식회사 대우아이에스
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Priority to KR1020070082763A priority Critical patent/KR20090018368A/en
Publication of KR20090018368A publication Critical patent/KR20090018368A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
    • H04N5/45—Picture in picture, e.g. displaying simultaneously another television channel in a region of the screen
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/455—Demodulation-circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/46—Receiver circuitry for the reception of television signals according to analogue transmission standards for receiving on more than one standard at will
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/50—Tuning indicators; Automatic tuning control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H2201/00—Aspects of broadcast communication
    • H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
    • H04H2201/11—Aspects of broadcast communication characterised by the type of broadcast system digital multimedia broadcasting [DMB]

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

Abstract

A DMB receiving method which is possible for dual display capable of watching the DMB broadcast of a first channel and a second channel and a DMB receiver using the same are provided to watch the DMB broadcast of the first channel and the second channel by using a tuner unit. A tuner unit(210) receives a DMB(Digital Multimedia Broadcasting) broadcast signal corresponding to a tuning frequency through an antenna. A controller controls the tuner unit to alternatively receive a first DMB broadcast signal and a second DMB broadcast signal. A baseband processing unit(230) demodulates the first DMB broadcast signal and the second DMB broadcast signal received in the tuner unit. A video signal processing unit(240) performs the signal processing of the demodulated first and second DMB broadcast signals and respectively produces a first video signal and a second video signal suitable for a display.

Description

DMB reception method with dual display and DMB receiver using the same {METHOD FOR RECEIVING DMB SIGNAL CAPABLE OF DUAL-DISPALY AND DMB RECEIVER USING THE SAME}

The present invention relates to a DMB reception method capable of dual display and a DMB receiver using the same, and in particular, by dividing a DMB broadcast signal received through an antenna into a first DMB broadcast signal and a second DMB broadcast signal and alternately receiving the data in units of frames. The present invention relates to a DMB receiving method capable of dual display capable of watching DMB broadcasts of a first channel and a second channel using one tuner, and a DMB receiver using the same.

DMB (Digital Multimedia Broadcasting) is a next generation digital radio broadcasting technology that can replace AM and FM analog radio broadcasting for listening to music.

When using the DMB technology, it is possible to provide various additional data services such as securities, traffic information, weather, as well as CD (Compact Disc) level audio service.

In addition, since the DMB method uses a transmission method of digital video broadcasting and orthogonal frequency division multiplexing (OFDM), which is used in a wireless LAN, it is possible to stably receive additional data service even at high speed. Can be.

In particular, since the DMB method can simultaneously service data to a plurality of users, users can use the service at a much lower price than existing mobile communication networks. In addition, the DMB method is capable of developing applications such as MP3 players and telematics systems, and many companies are accelerating the development of systems required for DMB services such as receiving modules and sets.

1 is an exemplary block diagram illustrating a DMB receiver according to the prior art.

As shown in FIG. 1, the DMB receiver 100 according to the related art decodes and outputs a DMB broadcast signal received through a channel tuned in response to a frequency tuned signal input from the controller 50. 2 selector switch for switching the signal processing means 10 and 20 and the decoded DMB broadcast signal output from the first and second signal processing means 10 and 20 selectively according to a user's operation. 30, a video processing / graphics processing unit 40 for converting the decoded moving image data input through the selection switch 30 into an analog signal and outputting the analog signal, and a frequency corresponding to the input key signal according to a user's intention. Output the selected signal to the first signal processing means 10 or the second signal processing means 20 to provide the user with moving picture, data, and audio signals included in the received DMB broadcast signal. A control unit 50 for controlling the entire system, a display unit 60 for outputting a video signal output from the video processing / graphic processing unit 40 under the control of the control unit 50, and the control unit 50; The first storage unit 70 stores an operation program for operating the entire system of the digital multimedia broadcasting receiving apparatus 100, and the moving image data processed by the video processing / graphic processing unit 50. It consists of a second storage unit 80.

When the user turns on the power of the DMB receiving apparatus 100, the controller 50 reads an operation program stored in the first storage unit 70 and controls the entire system so that the entire system is operated by the operation program. .

When the user selects a channel using key input means (not shown), the controller 50 receives a key signal corresponding to the channel, and tunes the tuner 11 to a frequency tuning signal corresponding to the key signal. Output to 21 to allow tuners 11 and 21 to tune into the channel.

The channels tuned by the tuners 11 and 21 are output to the main screen of the display unit 60 and the sub-screens configured on the main screen, respectively, so that two DMB broadcast signals can be simultaneously viewed.

However, the DMB receiver 100 according to the related art, in order to receive two DMB broadcast signals, not only the first signal processing means 10 and the second signal processing means 20, but also the tuner 11 and 21. In addition, since the components provided in the DMB receiving apparatus 100, such as the decoders 12 and 21 and the audio processor 13 and 32, must be used two by two, respectively, they are disadvantageous.

Literature Information of the Prior Art

KR 10-2003-0032397, May 21, 2003

The present invention has been made to solve this problem, and by dividing the DMB broadcast signal received from the antenna into the first DMB broadcast signal and the second DMB broadcast signal alternately in frame units, the first channel and The present invention provides a DMB receiving method capable of dual display capable of watching DMB broadcasting of a second channel and a DMB receiver using the same.

DMB receiver capable of dual display according to the present invention comprises a tuner unit for receiving a DMB broadcast signal corresponding to a preset frequency through an antenna; A control unit controlling the tuner unit to alternately receive a first DMB broadcast signal and a second DMB broadcast signal; A baseband processor which demodulates the first DMB broadcast signal and the second DMB broadcast signal received by the tuner; And a video signal processor configured to generate a first video signal and a second video signal to display the demodulated first DMB broadcast signal and the second DMB broadcast signal, respectively.

In this case, the controller may control to time-divided and receive the first DMB broadcast signal and the second DMB broadcast signal respectively received by the tuner, and the controller may control the first DMB broadcast signal and the second DMB broadcast. It is preferable to control the tuner to receive a signal in units of frames.

The DMB receiver capable of dual display according to the present invention may receive the first DMB broadcast signal and the second DMB broadcast signal by 15 frames per second, respectively, and the first video generated by the video processor Preferably, the apparatus further includes a display device for displaying the signal and the second video signal.

The video signal processor may generate the first video signal and the second video signal in the form of a picture in picture (PIP), and the first video signal is displayed on a main screen of the display device. The signal is preferably displayed in the form of PIP on the display device. The first DMB broadcast signal and the second DMB broadcast signal may be selected by a user.

DMB reception method capable of dual display according to the present invention comprises the steps of (a) receiving a first DMB broadcast signal and a second DMB broadcast signal through the antenna; (b) demodulating the first DMB broadcast signal and the second DMB broadcast signal; (c) signal processing the demodulated first DMB broadcast signal and the second DMB broadcast signal to generate a video signal, respectively; And (d) displaying a first video signal and a second video signal generated from the first DMB broadcast signal and the second DMB broadcast signal.

The step (a) may further include (e) selecting the first DMB broadcast signal and the second DMB broadcast signal according to a user input signal, and the step (a) may include the first DMB. A broadcast signal and the second DMB broadcast signal may be time-divided and received in frame units. In this case, preferably, the first DMB broadcast signal and the second DMB broadcast signal are received in units of the frame at 15 frames per second.

In addition, step (d) may include displaying the first video signal on a main screen of the display device, and displaying the second video signal in a PIP form.

DMB receiver capable of dual display according to the present invention can watch the DMB broadcast of the first channel and the second channel using a single tuner, there is an advantage that the system of the DMB receiver can be simply configured.

Preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram illustrating a DMB receiver capable of dual display according to the present invention.

As shown in FIG. 2, the DMB receiver 200 capable of dual display according to the present invention includes a tuner 210, a controller 220, a baseband processor 230, and a video signal processor 240. In addition, the DMB receiver 200 capable of dual display according to the present invention may further include a display device 300.

The tuner unit 210 performs a function of receiving a DMB broadcast signal corresponding to a preset frequency through an antenna.

The tuner 210 may alternately receive the first DMB broadcast signal and the second DMB broadcast signal selected by the user under the control of the controller 220, and the first DMB broadcast signal and the second DMB broadcast. The signal is preferably time-divided and received in units of frames.

The controller 220 controls the tuner 210 to alternately receive the first DMB broadcast signal and the second DMB broadcast signal.

The controller 220 may time-divide and receive the first DMB broadcast signal and the second DMB broadcast signal selected by the user, respectively, and the time-divided first DMB broadcast signal and the second DMB broadcast signal may be framed. Is preferably received.

For example, when the frame that can be received by the DMB receiver 200 is 30 frames per second, the controller 220 may control to alternately receive the first DMB broadcast signal and the second DMB broadcast signal by 15 frames per second. have. That is, when the tuner 210 receives the DMB broadcast signals of the first channel and the second channel selected by the user in the DMB receiver, the controller 220 assumes that the DMB receiver receives 30 frames per second. As shown in FIG. 3, the frames may be divided into respective control units so as to alternately receive broadcast signals of the first channel and broadcast signals of the second channel.

The baseband processor 230 demodulates the first DMB broadcast signal and the second DMB broadcast signal received by the tuner 210.

The video signal processor 240 generates a demodulated first DMB broadcast signal and the second DMB broadcast signal as a first video signal and a second video signal, respectively.

That is, the video signal processor 240 decodes the first DMB broadcast signal and the second DMB broadcast signal demodulated by the baseband processor 230 according to a preset format to decode the first video signal and the second video signal. Create

The first video signal and the second video signal generated by the video signal processor 240 may be displayed on the display device 300, and the first video signal may be displayed on the main screen of the display device 300. The second video signal may be displayed on the display device 300 in a picture in picture (PIP) form. That is, the first video signal may be displayed on the main screen of the display apparatus 300 according to the user's selection, and the second video signal may be displayed on a separate screen on the display apparatus 300, so as to display the first video signal. The video signal and the second video signal can be displayed simultaneously.

The display apparatus 300 performs a function of displaying the first video signal and the second video signal.

The display device 300 preferably has a PIP function. In addition, when the first video signal is displayed on the main screen, the second video signal is displayed on a separate screen in a PIP form, and the separate screen on which the second video signal is displayed is repositioned according to a user's selection. This is possible.

4 is a flowchart illustrating a DMB reception method capable of dual display according to the present invention.

As shown in FIG. 4, a first DMB broadcast signal and a second DMB broadcast signal are received through an antenna (S410). The first DMB broadcast signal and the second DMB broadcast signal may be selected according to a user's selection, and are preferably time-divided and alternately received in units of frames under the control of a controller. For example, assuming that a DMB receiver receives 30 frames per second, the first DMB broadcast signal and the second DMB signal are received by dividing the frame to receive the first DMB broadcast signal and the second DMB broadcast signal. The DMB broadcast signal can be alternately received by 15 frames.

The received first DMB broadcast signal and the second DMB broadcast signal are demodulated (S420).

The video signal processor generates the demodulated first DMB broadcast signal and the second DMB broadcast signal as a first video signal and a second video signal (S430). In this case, the generated first video signal and the second video signal may be signal processed to be displayed in a PIP form on a main screen of the display apparatus and a separate screen of the display apparatus.

The generated first video signal and the second video signal are displayed (S440). Preferably, the first video signal is displayed on a main screen of the display device, and the second video signal is preferably displayed on a separate screen of the display device. In this case, the separate screen may be changed in location according to the user's selection.

Although the preferred embodiment according to the present invention has been described above, this is merely exemplary and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the protection scope of the present invention should be defined by the following claims.

Therefore, the embodiments disclosed herein are not intended to limit the present invention but to describe the present invention, and the spirit and scope of the present invention are not limited by these embodiments. It is intended that the scope of the invention be interpreted by the following claims, and that all descriptions within the scope equivalent thereto will be construed as being included in the scope of the present invention.

1 is an exemplary block diagram illustrating a DMB receiver in accordance with the prior art.

2 is a block diagram illustrating a DMB receiver capable of dual display according to the present invention.

3 is an exemplary diagram illustrating an embodiment of a frame setting method of a DMB receiver according to the present invention;

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

200: DMB receiver 210: tuner unit

220: control unit 230: baseband processing unit

240: video signal processor 300: display device

Claims (13)

A tuner unit configured to receive a DMB broadcast signal corresponding to a preset frequency through an antenna; A control unit controlling the tuner unit to alternately receive a first DMB broadcast signal and a second DMB broadcast signal; A baseband processor which demodulates the first DMB broadcast signal and the second DMB broadcast signal received by the tuner; And A video signal processor configured to signal-process the demodulated first DMB broadcast signal and the second DMB broadcast signal to generate a first video signal and a second video signal suitable for display; Dual display capable DMB receiver comprising a. The method of claim 1, And the controller controls the first DMB broadcast signal and the second DMB broadcast signal received by the tuner to be time-divided and received, respectively. The method of claim 1, And the control unit controls the tuner to receive the first DMB broadcast signal and the second DMB broadcast signal in units of frames. The method of claim 3, The DMB receiver capable of dual display, wherein the first DMB broadcast signal and the second DMB broadcast signal are received in units of 15 frames per second. The method of claim 1, And a display device configured to display the first video signal and the second video signal generated by the video processor. The method of claim 1, And the video signal processor generates the first video signal and the second video signal in the form of a picture in picture (PIP). The method of claim 5, And the first video signal is displayed on a main screen of the display device, and the second video signal is displayed on the display device in a PIP form. The method of claim 1, And the first DMB broadcast signal and the second DMB broadcast signal are selected based on a user input. (a) receiving a first DMB broadcast signal and a second DMB broadcast signal through an antenna; (b) demodulating the first DMB broadcast signal and the second DMB broadcast signal; (c) signal processing the demodulated first DMB broadcast signal and the second DMB broadcast signal to generate a video signal, respectively; And (d) displaying a first video signal and a second video signal generated from the first DMB broadcast signal and the second DMB broadcast signal; DMB receiving method capable of dual display, comprising a. The method of claim 9, The step (a) further comprises the step of (e) selecting the first DMB broadcast signal and the second DMB broadcast signal according to a user input signal. The method of claim 9, The step (a), wherein the first DMB broadcast signal and the second DMB broadcast signal comprises the step of time-divided and received in units of frames, DMB reception method capable of dual display, characterized in that. The method of claim 11, And receiving the first DMB broadcast signal and the second DMB broadcast signal by 15 frames per second, respectively, in units of frames. The method of claim 9, The step (d) may include displaying the first video signal on a main screen of a display device, and displaying the second video signal in a PIP form.
KR1020070082763A 2007-08-17 2007-08-17 Method for receiving dmb signal capable of dual-dispaly and dmb receiver using the same KR20090018368A (en)

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KR1020070082763A KR20090018368A (en) 2007-08-17 2007-08-17 Method for receiving dmb signal capable of dual-dispaly and dmb receiver using the same

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KR1020070082763A KR20090018368A (en) 2007-08-17 2007-08-17 Method for receiving dmb signal capable of dual-dispaly and dmb receiver using the same

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