KR20090129159A - Method and apparatus for receiving seamless media data in broadcasting system - Google Patents

Abstract

PURPOSE: A method and an apparatus for receiving seamless image data in a broadcasting system are provided to receive data in advance by predicting a section that can not receive image contents, thereby providing image contents without disconnection. CONSTITUTION: A GPS receiving module(201) predicts a current position and a movement route of an image receiving device. If a service disable section exists in the movement route, a controller(207) requests image data corresponding to a section that can not receive image contents. An image storage unit(211) pre-stores the requested image data.

Description

Apparatus and method for receiving seamless video data in a broadcasting system {METHOD AND APPARATUS FOR RECEIVING SEAMLESS MEDIA DATA IN BROADCASTING SYSTEM}

The present invention relates to an apparatus and method for receiving image data in a broadcasting system, and more particularly, to an apparatus and method for receiving seamless image data using a Global Positioning System (GPS) signal in a broadcasting system.

Currently, portable broadcasting systems that can receive images on the move, such as DMB and satellite broadcasts, are widely used. Also, navigation and portable broadcasting devices that can receive GPS signals can receive images at high speed. Such portable broadcasting systems are rapidly increasing in recent years, and technology is also rapidly developing.

When the mobile broadcasting system receives the image information directly from the satellite or the image through the DMB when the user moves through the vehicle together with the terminal for playing the image in the portable broadcasting system, the data is restricted due to the geographical limitation such as tunnel or overpass. It may pass through an area where the signal cannot be received or the signal strength is weak.

In this case, a problem may occur that the reception strength of the image data is fine and may interfere with viewing.

Accordingly, an object of the present invention is to provide an apparatus and method for providing a seamless broadcasting service even when a video receiving apparatus moves in a broadcasting system.

Another object of the present invention is to provide an apparatus and method for providing a seamless broadcast service in an area where a video receiving device is not available in a broadcast system.

According to an aspect of the present invention, there is provided an image receiving apparatus for receiving seamless image data in a broadcasting system including a transmitting station, comprising: a GPS receiving module for predicting a current position and a moving path of the image receiving apparatus; Requesting the transmitting station for an electronic map including information on an unreceivable area of the data and the image data corresponding to the unreceivable section when the unserviceable section exists in the predicted moving path of the image receiving apparatus, And a control unit for controlling to receive the requested image data in advance, an image storage unit for storing the requested image data in advance, and a communication module for requesting and receiving the image data with the transmitting station. do.

The apparatus for receiving an image further includes a navigation system, and when there is a predetermined destination in the navigation, the image receiving apparatus predicts a directions path of the destination as a movement route.

The time point at which the controller requests the transmitting station for the image data corresponding to the unreceivable period may include a time between a current position of the video receiving apparatus and a start point of the unreceivable period, a time within the unreceivable period, And calculating the amount of data to be played within the unreceivable section.

The example of the requested image data is characterized in that the video receiving device is currently receiving broadcast data.

One example of the requested image data is predetermined advertisement image data.

According to an aspect of the present invention, there is provided a method for receiving seamless video data in a broadcasting system including a video receiving apparatus including a GPS receiving module and an image receiving module and a transmitting station providing a broadcast image. A first process of determining a location and a moving path of the image receiving apparatus using a second signal; a second process of determining whether a service unavailable section exists in the predicted moving path using an electronic map; If present, it is characterized in that it comprises a third step of receiving in advance the image data corresponding to the unreceivable period.

If a destination of the image receiving apparatus is designated, the method may further include a step of predicting a directions path of the destination as a movement route.

The third process may include calculating a current position of the image receiving apparatus and a time to a start point of the unreceivable section, a time within the unreceivable section, and an amount of data to be played within the unreceivable section. And a process of requesting the transmitting station in consideration of the time required for receiving the data amount, and receiving the corresponding video data from the transmitting station.

The example of the requested image data is characterized in that the video receiving device is currently receiving broadcast data.

One example of the requested image data is predetermined advertisement image data.

As described above, according to the present invention, even when there is a section in which the video content being played on the user's terminal is not received in the moving path predicted to be moved by the user, the video content is provided to the user without fail by predicting the data in advance. Do it. Through this function, the present invention can continuously provide content to the user without interruption of service, so that the user can watch the image without being disturbed by the surrounding terrain. In addition, the contents of the contents provided from the point at which the service is interrupted may be selected, such as playing a video that was to be played at a corresponding point in the content currently being played or playing a separate content such as an advertisement intended by the content provider. As a result, you can present a separate business model.

DETAILED DESCRIPTION Hereinafter, detailed descriptions of preferred embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that the same components in the figures represent the same numerals wherever possible. Specific details are set forth in the following description, which is provided to aid a more general understanding of the invention. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

The present invention proposes a receiving apparatus that can seamlessly receive image data even in a shadowed area in a portable image system that provides image data such as TV, DMB, VOD service.

In the first place, a description will be given of a receiving apparatus and method after a schematic description of the present invention using a portable broadcasting system applied to the present invention.

1 is a diagram illustrating a portable broadcasting system of the present invention.

Referring to FIG. 1, the portable broadcasting system of the present invention includes a transmitter 110 for transmitting image data, a GPS satellite 120, and a receiver 130.

The transmitter 110 shows a transmitter according to a broadcast service, and various transmitters are possible according to a broadcast service received by a subscriber. For example, in the case of terrestrial DMB, it may be a terrestrial transmitting station, and in the case of satellite TV and satellite DMB, a satellite transmitting station may be possible.

 The GPS satellite 120 is a satellite used to predict the location of the reception device 130. In the present invention, the GPS satellite 120 transmits a signal for identifying a time and a location in the location and the shadow area of the reception device 130.

The reception device 130 includes an image receiver according to a broadcast service, a GPS receiver capable of receiving a GPS signal, and an electronic map indicating a shaded area, thereby providing a seamless image by identifying a received shadowed area. . The reception device 130 may be, for example, a navigation terminal equipped with a DMB.

When the receiving device 130 describes a method for providing seamless image data, the current location of the user is determined by using GPS, and the moving path is tracked by combining with the electronic map. Afterwards, when predicting the future route through the area where the electronic map cannot be provided, the image data is continuously provided by estimating the time to stay in the area. For example, when it is predicted that the receiving device 130 passes through the tunnel 140, the service 150 calculates the time remaining until the entrance of the tunnel 140 and the section 160 in which the service is unavailable, and then the service By downloading the image up to the impossible section in advance, it is possible to display the image data without interruption.

In FIG. 1, for example, although the receiving device 130 shows a moving means in the form of a car, it may be applied to other moving means such as a train or a foot.

Then, the image receiving apparatus 130 according to the present invention will be described in detail.

2 is a block diagram illustrating an image receiving apparatus 130 according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the image receiving apparatus 130 of the present invention includes a GPS receiving module 201 for receiving a GPS signal, an electronic map 203 including image receiving shadow area information, and information from the components. A control unit 207 for determining whether to download the image data in advance and a video communication module 209 for receiving the image data from the image transmitting station 110 and requesting the transmission of the image data in order to download the image data in advance. The image storage unit 211 stores pre-downloaded image data, and a display 213 for reproducing and displaying the currently downloaded image or the pre-downloaded image to the user. In addition, the image receiving apparatus 130 may further include a navigation system 205, in which case the electronic map 203 may use a map in the navigation system 205.

Referring to the components, the GPS receiving module 201 is a receiving module capable of receiving GPS signals, obtains its location through communication with GPS satellites, and transmits it to the controller 207.

The electronic map 203 is a map including received shadow area information. When the image receiving device 130 includes a navigation system 205 used in a car or the like, an electronic map in the navigation system 205 may be used. Here, the reception shadow area information refers to data indicating a region where broadcast reception is impossible for a shadow area and a terrain such as a tunnel that are difficult to receive an image with respect to a broadcast type (satellite broadcasting or DMB) supported by the image receiving device 130. do.

The controller 207 determines its current location using the GPS signal received from the GPS receiving module 201 and determines a prediction progress direction at the current location. Thereafter, the controller 207 checks whether there is an unserviceable section in the prediction progress direction based on the road information and the reception shadow area information in the electronic map 203. If there is an unserviceable period, the video transmitting station 110 downloads an image data amount to be displayed in a corresponding region.

When the communication module 209 receives the image data transmitted from the image transmitting station 110 and receives a request for image data to be displayed in the non-service period from the controller 207, the image transmitting station or image transmitting Request from the satellite.

The image storage unit 211 stores image data downloaded by the control unit 207 for playback in an out of service interval.

The display 350 displays an image transmitted from the image receiving station 110 to the outside and displays a broadcast service and image data stored in the image storage unit 211.

As described above, in the present invention, if the reception shadow area exists in the determined prediction progress direction and a service unavailable section occurs, the time until the service unavailable section and the time within the service unavailable section are calculated to determine the amount of image data to be received in advance. Calculate. Detailed description thereof will be described in detail with reference to FIG. 3.

3 is a view showing down time and reproduction time of the amount of video data to be received in advance according to the present invention. Here, the horizontal axis represents the time axis.

Referring to FIG. 3, first, when the image receiving apparatus does not have a branch point or when the navigation path can be predicted by moving the navigation, when a reception shadow area such as a tunnel occurs, the controller 207 is connected with the GPS module 201. Based on the information of the electronic map 203, it can be seen that an unserviceable interval 307 occurs after a predetermined time as shown in (a). Accordingly, the controller 207 prevents the reproduction of the image from being interrupted by requesting the communication module 209 to play data 315 to be played during the service unavailable period 307 from which the service can be received.

When the non-serviceable interval occurs, first, the controller 207 assumes that the current speed is maintained and the time remaining until the user enters the non-serviceable interval 307 by the GPS information. Based on the current location and the distance information on the map, it can be determined as shown in Equation 1 below.

<Equation 1>

In addition, since the moving distance of the image receiving apparatus can be grasped in the unserviceable section 307 by the electronic map, the residence time in the unserviceable section 307 based on the current speed of the user is also simply as shown in Equation 2 below. Can be calculated as

<Equation 2>

When the two times are determined by the information obtained by the GPS signal and the electronic map, the control unit 207 stays in the unserviceable section from the time 323 when the image is stopped, the video data to be reproduced in the unserviceable section 307. 307, the amount of data to be played back is determined.

At this time, since the amount of data 311 to be transmitted is determined, an appropriate video transmission rate can be determined as shown in Equation 3 below, within the bandwidth allowance.

<Equation 3>

However, since there may be a limit in the available bandwidth, the final calculation is determined by the smaller of the maximum transmission rate by the available bandwidth and the required transmission rate calculated by Equation 3 as shown in Equation 4 below. .

<Equation 4>

The controller 207 determines to download in advance the image to be played in the non-service period, and when the final transmission rate is determined, the time required to receive all the data is calculated by Equation 5 below.

<Equation 5>

 Then, the download time point 321 of FIG. 3 (b) is after the time except for the estimated data reception time and the calculated spare time calculated from the remaining time until the unreceivable period passes.

In this case, when the download time 321 takes less time to receive data than the remaining time until the current image receiving apparatus is not available for service, only the original image is received after all necessary data has been received. If the remaining time is shorter than the time required for data reception, a service unavailable section occurs, but the time interval becomes shorter than before, thereby reducing the service unavailable section to a minimum.

In the above-described example, the case where the image receiving device 130 does not have a branch point or knows a moving path has been described. However, as a second example, even if at least two or more branch points exist in the moving path of the image receiving apparatus to determine the moving direction, the moving path may be determined after passing the branch points. After the movement path is determined, the operation can be performed in the same manner as the above-described example, and thus a detailed description thereof will be omitted.

Next, the overall flow of the image receiving method of the present invention will be described.

4 is a flowchart illustrating a seamless video receiving method in the video receiving apparatus 130 of the present invention.

Referring to FIG. 4, the GPS module 201 calculates a current position and a moving direction by receiving a GPS signal in step 401. Thereafter, the controller 207 checks whether the road guidance information exists in step 420. The road guide information indicates a case in which a moving path can be grasped using a navigation or the like.

If there is no road guide information in step 420, the process proceeds to step 430 to predict the moving route based on the road information of the electronic map 203. On the other hand, if there is the road guide information in step 420, proceeds directly to step 440.

In step 440, the controller 207 checks whether a service unavailable section exists in the predicted movement path. If the service unavailable section does not exist, the flow proceeds to step 410. However, if there is no serviceable section, the controller 207 calculates the remaining time until the entry of the corresponding section in step 450, and calculates a download time of image data corresponding to the serviceable section in step 460. Here, the download time of the image data is calculated in consideration of the data amount and the final transmission speed as mentioned in the above equation.

Thereafter, the control unit 207 requests the image transmitting station 110 for the image data in consideration of the download time in step 470. When the data is transmitted from the video transmitting station 110 by the request, the video data is stored in the video storage unit 211 in advance, and then reproduced when the service enters the service unavailable section.

The type of data transmitted in the present invention may vary according to the provision policy of the content provider. That is, data to be played at a corresponding point in time of the video content that the user is currently watching may be downloaded or may be implemented in the form of an advertisement.

 Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

1 is a diagram illustrating a portable broadcasting system of the present invention.

2 is a block diagram illustrating an image receiving apparatus according to an exemplary embodiment of the present invention.

3 is a view showing a down time point and a reproduction time point of a video data amount to be received in advance according to the present invention;

4 is a flowchart illustrating a seamless video receiving method in the video receiving apparatus of the present invention.

Claims (10)

A video receiving apparatus for receiving seamless video data in a broadcasting system including a transmitting station, A GPS receiving module for predicting a current position and a moving path of the image receiving device; An electronic map containing information on areas where image data cannot be received, A controller configured to request the transmitting station to request the image data corresponding to the unreceivable period and to receive the requested image data in advance when the unserviceable section exists in the predicted moving path of the image receiving apparatus; An image storage unit for storing the requested image data in advance; And a communication module for requesting and receiving the image data from the transmitting station. The image receiving apparatus of claim 1, And a navigation system, and when there is a predetermined destination in the navigation, predicting a route of the destination as a moving route. The method of claim 1, The time point for requesting the transmitting station for the image data corresponding to the unreceivable period may include a time between a current position of the video receiving apparatus and a start point of the unreceivable period, a time within the unreceivable period, and the reception. The video receiving device, characterized in that calculated using the amount of data to be played in the impossible section. The method of claim 1, wherein the requested image data, And the video data receiving device is broadcast data currently being received. The method of claim 1, wherein the requested image data, Image data receiving apparatus characterized in that the predetermined advertising image data. Claims [1] A method for receiving seamless image data in a broadcasting system comprising a video receiving device including a GPS receiving module and an image receiving module and a transmitting station providing a broadcast image. A first process of predicting a location and moving path of the image receiving apparatus using a GPS signal; A second process of checking whether there is an unserviceable section in the predicted moving path by using an electronic map; And a third process of receiving image data corresponding to the non-receivable section in advance when the non-receivable section exists. The method of claim 6, And if the destination of the image receiving apparatus is designated, predicting a directions path of the destination as a moving route. The method of claim 6, wherein the third process, Calculating a time between a current position of the image receiving apparatus and a start point of the unreceivable section, and a time within the unreceivable section; Calculating a data amount to be played within the unreceivable section; Requesting the transmitting station in consideration of the time for receiving the data amount; And receiving the corresponding video data from the transmitting station. The method of claim 6, wherein the requested image data, The image data receiving method according to claim 1, wherein the image receiving device is broadcast data being received. The method of claim 6, wherein the requested image data, Image data receiving method characterized in that the predetermined advertising image data.

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