KR20070016410A - Digital multimedia broadcasting receiver and method for controlling at moving mode in the same - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital multimedia broadcasting receiver and a control method in a mobile mode thereof. When viewing a TV in a mobile mode through a digital multimedia broadcasting receiver, audio decoding is performed without performing video decoding to prevent an accident due to dispersion of view. Only by providing audio-centric services, you can prevent accidents by preventing the dispersion of the field of vision, and stop the video and audio synchronization procedures and output of the video to reduce performance and power consumption. In the case of the mode, there is an advantage that efficient broadcasting can be viewed by storing the broadcasted broadcast stream and watching again in the future.

DMB, Terrestrial, Receiver, Transmitter, Broadcast Frequency, Local Shift, Channel Setting, Auto Search

Description

DIGITAL MULTIMEDIA BROADCASTING RECEIVER AND METHOD FOR CONTROLLING AT MOVING MODE IN THE SAME

1 is a block diagram showing a digital multimedia broadcasting receiver according to the present invention.

2 is a flowchart illustrating a control method in a mobile mode of a digital multimedia broadcasting receiver according to the present invention.

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

10: tuner portion 12: demultiplexer

14: Video Decoder 16: Audio Decoder

18: data processor 20: MUSICAM audio decoder

22; Control unit 24: output processing unit

26: display 28: DAC

30: speaker 32: user interface

34: storage unit

The present invention relates to a digital multimedia broadcasting receiver and a control method in a mobile mode thereof, and more particularly, to perform video decoding to prevent an accident due to dispersion of view when watching TV in a mobile mode through a digital multimedia broadcasting receiver. Not only can audio decoding be performed, but also accidents can be prevented, and video and audio synchronization procedures can be avoided, reducing performance and power consumption. The present invention relates to a digital multimedia broadcasting receiver and a control method in a mobile mode thereof.

Digital Multimedia Broadcasting (DMB) is an audio-centric method of digital audio broadcasting (DAB), a unique name for the joint project Eureka-147 (European REserch Coordination Agency project-147), which was formed in Europe since 1987. Is a video-named term that is a broad concept that encompasses audio, video, and data services.

Digital multimedia broadcasting is largely divided into terrestrial DMB and satellite DMB. Terrestrial DMB provides high quality audio, video, and data multimedia services. It is a new concept satellite broadcasting service that can watch multi-channel multimedia broadcasting anytime and anywhere through mobile phone, PDA) or car receiver.

Such digital multimedia broadcasting is Eureka-147 standard, and the transmission method uses COFDM (Coded Orthogonal Frequency Division Multiplexing) method. Service providers), and each service provider transmits various additional information data as well as television broadcasts and radio broadcasts by dividing the 1.2Mbps bandwidth into multiple video and audio channels and multiplexing them.

When a user carrying a digital multimedia broadcasting receiver for receiving such a digital multimedia broadcasting service wants to watch TV while walking, biking, or driving a vehicle, the user cannot concentrate on the TV broadcasting for movement, and thus, the program that is broadcasted is normally viewed. In addition, there is a problem that can not be efficiently watching TV broadcasts, as well as because the field of view is dispersed due to driving or moving, there is a problem that the risk of accidents increase due to the safety drop.

In addition, there is a problem in terms of power consumption because the video signal is output despite the normal TV broadcast watching due to the movement.

The present invention has been made to solve the above problems, and an object of the present invention is to perform video decoding to prevent an accident due to dispersion of view when watching TV in a mobile mode through a digital multimedia broadcasting receiver. Not only does audio decoding prevent accidents, but it also eliminates the need for video and audio synchronous procedures, reducing performance and power consumption, while storing broadcast streams for future viewing in mobile mode. The present invention provides a digital multimedia broadcasting receiver and a control method in a mobile mode thereof.

A digital multimedia broadcasting receiver according to the present invention for realizing the above object comprises a tuner section for demodulating a baseband signal of a predetermined frequency band from a digital multimedia broadcasting signal and outputting a transport stream, and a transport stream received from the tuner section. A demultiplexer for demultiplexing the video element into a video and audio element stream, a video decoder for decoding the video element stream output from the demultiplexer as video data, and an audio for decoding the audio element stream output from the demultiplexer as audio data. A decoder, a storage unit for storing video and audio element streams output from the demultiplexer, a data processor for processing data signals received from the tuner unit, and a MUSICAM audio for processing MUSICAM audio signals received from the tuner unit An output processor for synchronizing the outputs of the O decoder, the video decoder and the audio decoder with each other, synchronizing the output of the data processor and the output of the MUSICAM audio decoder with each other, outputting the video signal to the display, and outputting the audio signal to the speaker through the DAC. And control the tuner unit according to the user's selection through the user interface to control the broadcast signal received from the video decoder, the audio decoder, the data processor, the MUSICAM audio decoder, and the output processor so that the user can watch the broadcast. And a control unit for selectively operating the decoder and the audio decoder and controlling the demultiplexer to store the demultiplexed video and audio element streams in the storage unit.

In the present invention, the control unit selectively operates only the audio decoder when the movement mode is selected.

In the present invention, the control unit selectively operates the data processing unit and the MUSICAM audio decoder when the movement mode is selected.

In the present invention, the control unit limits the synchronization function of the output processing unit when the movement mode is selected.

In the present invention, the controller controls the video and audio element streams stored in the storage unit to be viewed and viewed when the moving mode is released.

In addition, according to the present invention, a method for controlling a digital multimedia broadcasting receiver in a mobile mode includes a first step of determining whether a mobile mode is selected in a control method of a digital multimedia broadcasting receiver, and video decoding when the mobile mode is selected in a first step. Stopping the display output and stopping the display output; and performing the second step, storing the demultiplexed video and audio element streams, and performing the third step. A fourth step of determining, a fifth step of stopping the storing of the video and audio element streams stored in the third step if the moving mode is released in the fourth step, and a stopping of the second step after the fifth step Characterized in that the sixth step of initializing the function.

In the present invention, the second step of stopping synchronization is characterized by stopping synchronization of video and audio and synchronization of MUSICAM audio and data.

According to the present invention, when the user moves to the digital multimedia broadcasting receiver and selects the mobile mode for watching TV, the output of the display is stopped as well as the video decoding and the synchronization of the audio can be provided to provide an audio-oriented service. This allows the user to listen to the audio only, and saves the video and audio element streams for future viewing.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. In addition, this embodiment is not intended to limit the scope of the present invention, but is presented by way of example only.

1 is a block diagram showing a digital multimedia broadcasting receiver according to the present invention.

As shown here, a tuner unit 10 for demodulating a baseband signal of a predetermined frequency band in a digital multimedia broadcasting signal to output a transport stream, and a transport stream received from the tuner unit 10 include a video and audio element. A demultiplexer 12 for demultiplexing into a stream, a video decoder 14 for decoding the video element stream output from the demultiplexer 12 into video data, and an audio element stream output from the demultiplexer 12 Audio decoder 16 for decoding the data into audio data, a storage unit 34 for storing video and audio element streams output from the demultiplexer 12, and a data signal received from the tuner unit 10, that is, BWS. From a data processing unit 18 and a tuner unit 10 for processing data signals such as Broadcasting Website Service (TPEG), Transport Protocol Experts Group (TPEG), and JPG. The MUSICAM audio decoder 20 for processing the received MUSICAM audio signal, and the output of the video decoder 14 and the audio decoder 16 are synchronized with each other, and the output of the data processor 18 and the output of the MUSICAM audio decoder 20 are synchronized. Are synchronized with each other to output a video signal to the display 26 and to output the audio signal to the speaker 30 through the digital to analog converter (DAC) (28) 24 and through the user interface 32 The tuner 10 controls the video decoder 14, the audio decoder 16, the data processor 18, the MUSICAM audio decoder 20, and the output processor 24 according to a user's selection. To control broadcast viewing and selectively operate the video decoder 14 and the audio decoder 16 when the moving mode is selected, and the demultiplexer 12 demultiplexes the video and audio elements. Control unit 22 for controlling the rim to be stored in the storage unit 34.

In the above, the control unit 22 stops the operation of the video decoder 14 and selectively operates only the audio decoder 16 for the audio-oriented service when the moving mode is selected, and operates the data processing unit 18 and the MUSICAM audio decoder 20. It can also be applied in the field of radio broadcasting which is selectively operated to provide multimedia data services.

When the mobile mode is released, the controller 22 controls the video and audio element streams stored in the storage 34 to be viewed and output.

The control method in the mobile mode of the digital multimedia broadcasting receiver according to the present invention made as described above will be described with reference to a flowchart for explaining the control method in the mobile mode of the digital multimedia broadcasting receiver shown in FIG. Same as

First, it is determined whether the movement mode is selected (S10). In this case, when the mobile mode is not selected, the digital multimedia broadcasting service is used in the general state and is serviced by the general method.

However, when the moving mode is selected, the user moves while walking, biking, or driving a vehicle, and thus, the user switches from a video-based service to an audio-based service.

Therefore, video decoding is stopped so that decoding of the video element stream is not performed in the demultiplexed video and audio element stream (S12). At this time, the audio element stream is normally decoded and the audio is output through the speaker.

Since video decoding is not performed, an operation for synchronizing video and audio is not necessary (S14).

At this time, in the case of a radio broadcast provided with a multimedia data service, synchronization of data and audio is stopped.

Then, since there is no output of video, the output of the display is stopped (S16).

As such, video decoding required for video processing, synchronization for synchronizing with video, and outputting of a display for output of video are stopped, and audio-oriented services can be provided while reducing power consumption for video processing.

In addition, since video is not provided, it is possible to prevent dispersion of vision and to concentrate on the behavior required for movement, thereby preventing safety accidents.

Meanwhile, the video and audio element streams, which are broadcast streams, may be stored in the storage unit so that the video which has not been processed in the moving mode may be viewed in the future in order to be viewed again when the moving mode is not in the future (S18).

In this way, it is determined whether the movement mode is released while providing the audio-oriented service (S20).

At this time, if the mobile mode is not released, the audio-oriented service continues to be provided, but if the mobile mode is released, the storage of the stored video and audio element streams is stopped (S22).

Then, the video decoding for processing the video that has been stopped, the synchronization for synchronizing with the video, and the output function of the display for outputting the video are initialized so that they can be provided with video and audio-oriented services (S22).

As described above, the present invention provides an audio-oriented service by performing only audio decoding without performing video decoding to prevent an accident due to dispersion of view when watching TV in a mobile mode through a digital multimedia broadcasting receiver. In addition, there is an advantage that can prevent the accident in advance by preventing the dispersion of vision.

In addition, by providing an audio-centric service, there is an advantage that can reduce the performance and power consumption by stopping the video and audio synchronization procedure and output of the video.

In addition, in the mobile mode, there is an advantage that efficient broadcast viewing is possible by storing the broadcasted broadcast stream and watching again in the future.

Claims (7)

A tuner unit which demodulates a baseband signal of a predetermined frequency band from a digital multimedia broadcasting signal and outputs a transport stream; A demultiplexer which demultiplexes the transport stream received from the tuner into video and audio element streams; A video decoder for decoding the video element stream output from the demultiplexer into video data; An audio decoder for decoding the audio element stream output from the demultiplexer into audio data; A storage unit for storing the video and audio element streams output from the demultiplexer; A data processor for processing a data signal received from the tuner unit; A MUSICAM audio decoder for processing a MUSICAM audio signal received from the tuner unit; An output processor for synchronizing the outputs of the video decoder and the audio decoder with each other and synchronizing the output of the data processor and the output of the MUSICAM audio decoder with each other to output a video signal to a display and to output an audio signal to a speaker through a DAC; , Control the tuner unit according to a user's selection through a user interface to control the tuner to view a broadcast signal by controlling the video decoder, the audio decoder, the data processor, the MUSICAM audio decoder, and the output processor; A control unit for selectively operating the video decoder and the audio decoder when the movement mode is selected and controlling the demultiplexer to store the video and audio element streams demultiplexed in the storage unit; Digital multimedia broadcasting receiver, characterized in that consisting of. The digital multimedia broadcasting receiver as claimed in claim 1, wherein the controller selectively operates only the audio decoder when the movement mode is selected. The digital multimedia broadcasting receiver as claimed in claim 1, wherein the controller selectively operates the data processor and the MUSICAM audio decoder when a movement mode is selected. The digital multimedia broadcasting receiver as claimed in claim 1, wherein the controller restricts a synchronization function of the output processor when selecting a movement mode. The digital multimedia broadcasting receiver as claimed in claim 1, wherein the controller controls the video and audio element streams stored in the storage unit to be viewed when the mobile mode is released. In the control method of a digital multimedia broadcasting receiver, A first step of determining whether a movement mode is selected, A second step of stopping video decoding and synchronization and stopping display output when the moving mode is selected in the first step; A third step of storing the demultiplexed video and audio element streams after performing the second step; A fourth step of determining whether the movement mode is released after performing the third step; A fifth step of stopping storage of the video and audio element streams stored in the third step when the movement mode is released in the fourth step; A sixth step of initializing a function suspended in the second step after performing the fifth step; Control method in the mobile mode of the digital multimedia broadcasting receiver, characterized in that consisting of. The method of claim 6, wherein the stopping of the second step stops the synchronization of the video and the audio and the synchronization of the MUSICAM audio and the data.

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