KR100754618B1 - Digital broadcasting system and method thereof - Google Patents

Abstract

The present invention provides a digital broadcast system, requesting broadcast data for the digital broadcast to a streaming server that provides image information in real time when the current location is a weak electric field when performing a preset recording mode for a predetermined digital broadcast. A digital broadcast receiving terminal for receiving and recording the requested broadcast data in real time from a streaming server, and when the broadcast data request for a predetermined digital broadcast is received from the digital broadcast receiving terminal, the corresponding broadcast data to the digital broadcast receiving terminal through a mobile communication network. It is characterized by including a streaming server for real-time transmission. Therefore, in the present invention, even if the digital broadcasting receiving terminal having reserved recording is located in the weak electric field area while performing the reserved recording mode, the reservation service can be performed by receiving the broadcasting service continuously through the streaming server, thereby effectively making a reservation regardless of the weak electric field area. Recording can be performed.

Digital broadcasting system, scheduled recording

Description

DIGITAL BROADCASTING SYSTEM AND METHOD THEREOF

1 is a diagram schematically illustrating a digital broadcasting system according to an embodiment of the present invention.

2 is a block diagram of a streaming server included in a digital broadcasting system according to an embodiment of the present invention.

3 is a block diagram illustrating a digital broadcast receiving terminal according to an embodiment of the present invention.

4 is a flowchart illustrating a broadcast service providing process between a digital broadcast receiving terminal and a streaming server according to an exemplary embodiment of the present invention.

The present invention relates to digital broadcasting services, and more particularly, to a digital broadcasting service system and a method thereof.

In general, digital broadcasting refers to a broadcasting service that provides a user with high quality, high sound quality, and higher service in place of a conventional analog broadcasting, and is classified into satellite digital broadcasting and terrestrial digital broadcasting.

Satellite digital broadcasting is mainly intended for mobile services, and is a broadcast capable of watching multi-channel multimedia broadcasting anytime, anywhere through a portable receiver (mobile phone, personal digital assistant) or a vehicle receiver.

Terrestrial digital broadcasting, which is based on DAB (Digital Audio Broadcasting), is a concept of performing multimedia broadcasting for mobile reception using the VH channel 12, which is currently empty, and using TV, radio and data broadcasting using multiple channels. Means a broadcast that transmits a combination of the two.

Recently, with the development of digital broadcasting technology and mobile communication technology, interest in digital broadcasting service for allowing digital broadcasting to be watched on the go has increased. In particular, interest is increasing in digital-multimedia-broadcast (DMB) services using mobile communication terminals.

Meanwhile, the digital broadcast reception terminal directly receives broadcast data retransmitted from the satellite or receives it through a terrestrial repeater. The terrestrial repeater is installed at a place where satellite signals such as a shadow area or a basement cannot be reached due to a high-rise building and transmits digital broadcast data from the satellite.

Accordingly, the digital broadcast receiving terminal can receive digital broadcast data even where the satellite signal cannot be reached regardless of the direction of the satellite and the satellite signal directly transmitted from the satellite through the terrestrial repeater.

However, in the case of terrestrial digital broadcasting, mobile reception is possible on the ground, but whether digital broadcasting can be received in a building or basement is unclear. Therefore, it is necessary to install a repeater (50 ~ 70km) and a cap filler (Gap Filler) to solve the shadow area as described above.

In addition, in the case of satellite digital broadcasting, it is necessary to additionally install a cap filler to solve the shadow area as described above.

As a result, it is expected that the astigmatism and the weak electric field will exist until the shade area of the digital broadcast is completely eliminated by installing a repeater or a cap filler as described above. Therefore, when the user enters the astigmatism zone and the weak electric field while moving while receiving digital broadcasting, there is a high possibility that the digital broadcasting cannot be temporarily received, which acts as a burden for providing a seamless and seamless broadcasting service. have.

On the other hand, recently, the function of pre-recording the broadcast program is added to the digital broadcasting terminal has been eliminated the inconvenience that the user has to record in accordance with the start time of the digital broadcast program.

However, if the user of the digital broadcasting receiving terminal is located in the shadow area, that is, the weak electric field area, or enters the weak electric field area while moving, the scheduled recording mode may not receive the digital broadcast signal. The problem of not being able to effectively record the video will occur.

Accordingly, an object of the present invention is to provide a digital broadcasting system and a method thereof, in which a digital broadcasting receiver terminal having reserved recording for digital broadcasting can effectively perform reservation recording regardless of a weak field.

Another object of the present invention is to provide a digital broadcasting system and method for effectively providing a broadcast service in a weak electric field section.

In order to achieve the above object, the present invention provides a streaming server that provides video information in real time when a current location is a weak electric field when performing a preset recording mode for a predetermined digital broadcast. A digital broadcast receiving terminal for requesting broadcast data and receiving and recording the requested broadcast data in real time from the streaming server; and a broadcast data request for a predetermined digital broadcast from the digital broadcast receiving terminal. It characterized in that it comprises a streaming server for transmitting in real time to the digital broadcast receiving terminal.

Preferably, the digital broadcasting system further comprises a broadcasting station for transmitting digital broadcast data.

In addition, the present invention provides a digital broadcast service providing method of a digital broadcasting system, the digital broadcast receiving terminal requests broadcast data for digital broadcasting to a streaming server that provides the video information in real time when the preset recording mode is performed in the weak field area And transmitting, by the streaming server, the broadcast data in real time to the digital broadcast receiving terminal through a mobile communication network in response to a broadcast data request of the digital broadcast receiving terminal, and the digital broadcast receiving terminal from the streaming server. And recording the broadcast data received in real time.

Preferably, when the digital broadcasting service providing method of the digital broadcasting system leaves the weak electric field area while the digital broadcasting receiving terminal records the broadcasting data received from the streaming server, request the transmission of the broadcasting data to the streaming server. And receiving and recording digital broadcast data from a broadcasting station transmitting the digital broadcast.

More preferably, the digital broadcasting service providing method of the digital broadcasting system further includes the step of requesting the broadcasting data to the streaming server when the digital broadcasting receiving terminal receives the digital broadcasting data and enters the weak electric field area during recording. It is characterized by.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the same elements in the figures are represented by the same numerals wherever possible. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

1 is a diagram schematically illustrating a configuration of a digital broadcasting system according to an exemplary embodiment of the present invention.

The illustrated digital broadcasting system includes a broadcasting server 100 that broadcasts multimedia data composed of digital broadcasting data, a streaming server 200 providing image information in real time, and a digital broadcasting receiving the digital broadcasting data and outputting the multimedia data. It includes a receiving terminal 300.

The broadcast station 100 outputs broadcast data to the digital broadcast receiving terminal 300 and the streaming server 200. The broadcast data output to the digital broadcast reception terminal 300 is transmitted to the digital broadcast reception terminal 300 by the satellite 30 or the terrestrial repeater 40. Meanwhile, the broadcasting station 100 may include a streaming server 200.

The streaming server 200 receiving broadcast data from the broadcasting station 100 transmits the broadcast data to the digital broadcast receiving terminal 300 in real time through the mobile communication network 50 when a broadcast data request is received from the digital broadcast receiving terminal 300. do.

The mobile communication network 50 is provided with a plurality of exchanges (not shown) for switching the call path, each exchange is coupled with a plurality of base station controllers (BSC), each base station controller (BSC) a plurality of base stations (BS) is bound.

In addition, each base station (BS) is coupled to a plurality of terminals (MS) through the airwave transmission network, wherein the base station (BS) and the terminal (MS) can be combined in a TDMA or CDMA scheme and transmit packet data such as SMS messages have. In addition, each switch (EX) is coupled to a public switched telephone network (PSTN), an integrated services digital network (ISDN), or another mobile communication network through a predetermined gateway, and interworking function (IWF) and WAP. It can be connected to the Internet through a gateway.

Then, the configuration of the streaming server 200 will be described.

2 is a block diagram of a streaming server according to an embodiment of the present invention.

The illustrated streaming server 200 includes a decoder 210, an encoder 220, a server controller 230, a packetizer 240, and a transceiver 250.

1 and 2, the decoder 210 decodes broadcast data output from the broadcasting station 100 and outputs the decoded broadcast data to the server controller 230.

The encoder 220 encodes the decoded broadcast data under the control of the server controller 230.

The server controller 230 controls the overall operation of the streaming server 200 according to the embodiment of the present invention. In addition, the server controller 230 controls to transmit the broadcast data in real time according to the broadcast data request of the digital broadcast receiving terminal 300, and transmits the corresponding broadcast data when there is a request to stop broadcasting data transmission from the digital broadcast receiving terminal 300. Stop.

In addition, the server controller 230 controls to encode, packetize, and transmit broadcast data from a specific time point among broadcast data stored in the buffer 260 when a broadcast data request is received from a specific time point from the digital broadcast reception terminal 300. .

The packetizer 240 packetizes the broadcast data encoded by the encoder 220.

The transceiver 250 transmits the packetized broadcast data to the digital broadcast receiver terminal 300 under the control of the server controller 230. Also, the transceiver 250 transmits a message for requesting broadcast data from the digital broadcast reception terminal 300 to the server controller 230.

The buffer 260 stores digital broadcast data transmitted from the broadcasting station 100 in real time for a predetermined time under the control of the server controller 230.

3 is a block diagram of a digital broadcast receiving terminal according to an embodiment of the present invention.

The illustrated digital broadcast receiving terminal 300 includes a digital broadcast receiving unit 310, a digital broadcast signal measuring unit 320, a key input unit 330, a control unit 340, a memory 350, a wireless transmitting and receiving unit 360, and audio. The processor 370 and the display 380 are included.

The digital broadcast receiver 310 receives and demodulates a predetermined digital broadcast frame under the control of the controller 340, and outputs the demodulated digital broadcast frame to the controller 340.

Although not shown in FIG. 3, the digital broadcast receiver 310 may include a demodulator (not shown) for demodulating the received digital broadcast frame into a digital data stream.

The digital broadcast signal measurement unit 320 measures the strength or bit error rate (BER) of the digital broadcast signal received by the digital broadcast receiver 310 under the control of the controller 340.

The key input unit 330 receives a user manipulation signal such as a key input or a voice input and transmits it to the controller 340.

The controller 340 controls the overall operation of the digital broadcast receiving terminal 300 according to the embodiment of the present invention. In addition, the controller 340 decodes the digital broadcast stream demodulated by the digital broadcast receiver 310 to output the audio processor 370 and the display unit 380 through a video signal processor (not shown) and an audio signal processor (not shown). )

The controller 340 sets a reserved recording function for a predetermined digital broadcasting program according to a user's request, and when the reserved recording mode is performed according to the set reserved recording function, the digital broadcasting receiving terminal 300 is located in the weak electric field area. Determine if there is. At this time, the controller 340 determines whether the current location of the digital broadcast receiving terminal 300 is a weak electric field through the digital broadcast signal measuring unit 320. That is, the controller 340 determines the weak electric field area when the signal strength or bit error rate measured by the digital broadcast signal measuring unit 320 is less than or equal to a preset threshold.

The controller 340 is a streaming server 200 that provides image information in real time when the current location of the digital broadcast receiving terminal 300 is a weak electric field when the reserved recording mode is executed, and broadcast data (eg, Video data on demand). At this time, the controller 340 requests broadcast data by transmitting a message including broadcast information of the digital broadcast to the streaming server 200. The broadcast information includes channel name and broadcast time information of a digital broadcast, and the message may be a Real-Time Streaming Protocol (RTSP) message.

In addition, the controller 340 may alarm the user if the current location of the digital broadcast receiving terminal 300 is a weak electric field.

When the broadcast data is received from the streaming server 200 in response to the request, the controller 340 records the received broadcast data.

The control unit 340 receives the broadcast data transmitted by the streaming server 200, if leaving the weak field during recording, and controls the wireless transmitter and receiver 360 to request the streaming server 200 to stop transmitting the broadcast data, The broadcast station 100 receives digital broadcast data transmitted in real time.

If the controller 340 enters the weak electric field while recording digital broadcast data received from the broadcasting station 100 in real time, the controller 340 requests the streaming data from the streaming server 200 again. At this time, when the broadcast data request, the controller 340 preferably transmits to the streaming server 200 information indicating a time when the weak field is entered. This is for the digital broadcast reception terminal 300 to receive broadcast data from a weak electric field entry time from the streaming server 200. For example, if the time when the digital broadcasting reception terminal 300 enters the weak electric field region during one hour of recording of the digital broadcasting program is 20 minutes from the broadcast time, the streaming server 200 is 20 minutes after the broadcast start time. Is to transmit the broadcast data to the digital broadcast receiving terminal 300.

The memory 350 stores various information necessary for controlling the operation of the digital broadcast receiving terminal 300 according to the embodiment of the present invention.

The wireless transmitter / receiver 360 is responsible for the transmission and reception of voice data, text data, image data, and control data under the control of the controller 340, and an RF transmitter (not shown) which upconverts and amplifies the frequency of the transmitted signal. And an RF receiver (not shown) for low noise amplifying the received signal and converting the frequency down. Although not shown in FIG. 3, the wireless transmitter / receiver 360 may include a modem including a transmitter for encoding and modulating a transmitted signal and a receiver for demodulating and decoding the received signal. have.

The audio processor 370 modulates the electrical signal input from the microphone and converts the electrical signal into voice data. The audio processor 370 demodulates the encoded voice data input from the wireless transmitter / receiver 360 into the electrical signal and outputs the electrical signal to the speaker. . In addition, the audio processor 370 may include a codec for converting and reproducing a digital audio signal received by the wireless transmitter / receiver 360 into an analog signal or converting an analog audio signal generated from a microphone into a digital audio signal. desirable. The codec may include a data codec for processing packet data and an audio codec for processing an audio signal such as voice, and may be included in the controller 340.

The display unit 380 outputs various display data generated by the digital broadcast receiving terminal 300, and preferably includes a liquid crystal display (LCD) or the like capable of sufficiently supporting the resolution of the digital broadcast data. In this case, when the LCD is implemented using a touch screen method, the display unit 380 may operate as an input unit.

4 is a flowchart illustrating a broadcast service providing process between a digital broadcast receiving terminal and a streaming server according to an exemplary embodiment of the present invention.

Referring to FIGS. 1 to 3, FIG. 4 is as follows.

The digital broadcast receiving terminal 300 sets a reserved recording function for a predetermined digital broadcast based on a user's request (S110).

The digital broadcast receiving terminal 300 checks whether the scheduled recording mode is started (S115). That is, when the reserved recording function is set, the digital broadcast receiving terminal 300 checks whether the reserved recording time is performed by driving a timer (not shown).

If the scheduled broadcast recording time is set, the digital broadcast receiving terminal 300 switches the operation mode to the reserved recording mode and checks whether the current position is a weak electric field (S120). The digital broadcast reception terminal 300 may determine whether the area is a weak field based on the strength or error bit rate (BER) of the digital broadcast signal received at the current location.

When the current location is a weak electric field, the digital broadcast receiving terminal 300 requests the streaming server 200 for broadcast data for the digital broadcast in which the reserved recording is set (S125). In this case, the digital broadcast receiving terminal 300 preferably transmits a message including the broadcast information of the digital broadcast to the streaming server 200 when the broadcast data request is made. The broadcast information includes a channel name and a broadcast time information of a digital broadcast, and the message may be a Real-Time Streaming Protocol (RTSP) message. Also, if the current location is a weak electric field, the digital broadcast receiving terminal 300 may alert the user.

Meanwhile, if the current location is not the weak electric field in step S120, the digital broadcast receiving terminal 300 receives and records the digital broadcast data in which the reserved recording is set from the broadcasting station 100 (S180). The digital broadcast receiving terminal 300 checks whether or not recording ends (S185), and when the recording ends, ends the execution of the reserved recording mode (S190).

When the streaming server 200 receives a broadcast data request, that is, a broadcast data request message including broadcast information, from the digital broadcast receiving terminal 300, the streaming server 200 checks whether the received message includes information indicating a weak electric field entry time. (S130).

The streaming server 200 detects broadcast information included in the message if the message does not include the information indicating the time of entry into the weak electric field (S135).

The streaming server 200 transmits the corresponding broadcast data according to the broadcast information in real time to the digital broadcast receiving terminal 300 requesting the broadcast data (S140). In this case, the streaming server 200 packetizes the digital broadcast data provided from the broadcasting station 100 in real time and transmits the packetized data to the digital broadcast receiving terminal 300.

On the other hand, if the streaming server 200 includes the information indicating the weak electric field entry time in the received message in step S130 detects the broadcast information and the information indicating the weak electric field entry time included in the message (S145).

The streaming server 200 reads and packetizes broadcast data from the weak electric field entry point in the buffer 260 and transmits the packetized broadcast data to the digital broadcast receiving terminal 300 in real time (S150).

The digital broadcast receiving terminal 300 records the requested broadcast data when it is received from the streaming server 200 (S155).

The digital broadcast receiving terminal 300 checks whether the recording ends (S160), and when the recording ends, ends the reserved recording mode execution (S190).

If the recording is not finished, the digital broadcast receiving terminal 300 checks whether the weak field is located (S165). The digital broadcast receiving terminal 300 continues the process of recording broadcast data received from the streaming server 200 (S155).

When the digital broadcast reception terminal 300 leaves the weak electric field area during the broadcast data recording, the digital broadcast reception terminal 300 requests the streaming server 200 to stop transmission of the broadcast data (S170).

If there is a broadcast data transmission stop request from the digital broadcast reception terminal 300, the streaming server 200 stops transmission of the corresponding broadcast data (S175).

The digital broadcast reception terminal 300 requests to stop transmission of the broadcast data, receives digital broadcast data immediately from the broadcast station 100, and records the received data (S180).

The digital broadcast receiving terminal 300 receives the digital broadcast data and checks whether recording ends during recording (S185). When the recording ends, the digital broadcast receiving terminal 300 ends performing the reserved recording mode (S190).

Meanwhile, if the digital broadcast data recording is not finished, the digital broadcast receiving terminal 300 returns to step S120 of checking whether the weak electric field is entered.

If the digital broadcast receiving terminal 300 does not enter the weak field until the recording of the digital broadcast data ends, the digital broadcast receiving terminal 300 ends the recording of the corresponding digital broadcast data after completing the recording (S190).

However, when the digital broadcast reception terminal 300 enters the weak electric field area during the digital broadcast data recording, the digital broadcast reception terminal 300 requests broadcast data from the streaming server 200 (S125). At this time, the digital broadcast receiving terminal 300 preferably transmits the information to the streaming server 200 including the information indicating the entry point of the weak electric field in the message including the broadcast information when the broadcast data request.

In the above 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 scope of the following claims, but also by the equivalents of the claims.

As described above, according to the present invention, even if the digital broadcast receiving terminal having the reserved recording is located in the weak electric field area during the reserved recording mode, the broadcast service is continuously received through the streaming server to perform the scheduled recording, so You can effectively perform scheduled recording without

Claims (19)

In the digital broadcast providing system, If the current location is a weak electric field when performing a preset recording mode for a predetermined digital broadcast, the broadcast server for the digital broadcast is requested to a streaming server providing image information in real time, and the requested broadcast data is real-time from the streaming server. Digital broadcast receiving terminal for receiving and recording with, And a streaming server that transmits the broadcast data to the digital broadcast receiving terminal in real time through a mobile communication network when a broadcast data request for a predetermined digital broadcast is received from the digital broadcast receiving terminal. The method of claim 1, And a broadcasting station for transmitting digital broadcasting data. The method of claim 2, And the broadcasting station includes the streaming server. The method of claim 1, The broadcast data is a digital broadcasting system, characterized in that the video (Video On Demand) data. The method of claim 1, wherein the digital broadcast receiving terminal And transmitting a message including the broadcast information of the digital broadcast to the streaming server when the broadcast data request for the digital broadcast is made. The method of claim 5, The broadcast information includes channel information and broadcast time information. The terminal of claim 1 or 2, wherein the digital broadcast receiving terminal is And when the weak field is moved out of the broadcast data transmitted by the streaming server, requesting the streaming server to stop transmission of the broadcast data, and receiving digital broadcast data. The method of claim 7, wherein the streaming server And stopping transmission of the corresponding broadcast data when a request for stopping broadcast data transmission is received from the digital broadcast receiving terminal. The method of claim 7, wherein the digital broadcast receiving terminal When entering the weak field during the reception of the digital broadcast data, a message including the broadcast information of the digital broadcast is transmitted to the streaming server to request broadcast data for the digital broadcast, wherein the message indicates a point of entry of the weak field. Digital broadcasting system comprising information. The method of claim 9, wherein the streaming server And a broadcast data request including information indicating a weak electric field entry time from the digital broadcast receiving terminal, transmitting broadcast data from the weak electric field entry time point to the digital broadcast receiving terminal. In the digital broadcasting service providing method of the digital broadcasting system, Requesting broadcasting data for digital broadcasting to a streaming server that provides video information in real time when the digital broadcasting receiving terminal performs a preset recording mode in a weak field; Transmitting, by the streaming server, corresponding broadcast data to the digital broadcast receiving terminal in real time through a mobile communication network in response to a broadcast data request of the digital broadcast receiving terminal; And recording, by the digital broadcast receiving terminal, broadcast data received in real time from the streaming server. The method of claim 11, And the broadcast data is video on demand data. The method of claim 11, wherein the requesting process is And transmitting a message including broadcast information of the digital broadcast to the streaming server when the digital broadcast receiving terminal requests broadcast data. The method of claim 13, And the broadcast information includes channel information and broadcast time information of a digital broadcast. The method of claim 11, Requesting to stop the transmission of the broadcast data to the streaming server when the digital broadcast receiving terminal leaves the weak field during recording of the broadcast data received from the streaming server; And receiving and recording digital broadcast data from a broadcasting station transmitting the digital broadcast. The method of claim 11, wherein the transmission process And stopping transmission of the corresponding broadcast data when there is a request to stop broadcasting data transmission from the digital broadcast receiving terminal. The method of claim 15, And requesting broadcast data from the streaming server when the digital broadcast reception terminal receives the digital broadcast data and enters a weak electric field area during recording. 18. The method of claim 17, wherein the requesting process is When the digital broadcast receiving terminal requests the broadcast data, the digital broadcast service providing method of the digital broadcasting system comprising transmitting information to the streaming server by including the information indicating the time of entry into the weak field in the message including the broadcast information. The method of claim 11 or 18, wherein the transmission process When a broadcast data request including information indicating a weak electric field entry time is received from the digital broadcast receiving terminal, broadcast data from the weak electric field entry time point is transmitted to the digital broadcast receiving terminal. How to Provide.

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