JP4018588B2 - Satellite broadcast system and satellite broadcast receiver - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a satellite broadcasting system that provides broadcasting services such as video, audio, and data using broadcasting or communication satellites placed in geostationary orbit, and in particular, other communication and broadcasting media in addition to satellite broadcasting media. The present invention relates to a satellite broadcast receiving device that realizes fusion with.
[0002]
[Prior art]
In recent years, satellite broadcasting systems for mobiles using broadcasting satellites or communication satellites in geostationary orbit have been proposed. This type of system employs MPEG4 (Moving Picture Coding Experts Group 4) as an encoding method and uses the S band for the downlink from the satellite to the mobile terminal device, so that an in-vehicle terminal device, a portable information terminal device, etc. This mobile terminal device has received much attention because it can receive multimedia information consisting of video, audio, text, and the like.
[0003]
By the way, this type of system assumes the use of MPEG4 as described above. MPEG4 is based on the fact that the conventional moving image encoding method simply encodes an image as one scene, whereas a plurality of AVOs (Audio / Visual Objects: components represented by people and backgrounds) The scene is expressed by synthesizing the hierarchized video / sound signal. Each hierarchical component may be a natural image / sound or a composite image / sound. Further, it may represent the entire scene or may represent a part. Furthermore, there is a great degree of freedom in the degree of overlap of components and temporal / spatial relationships.
[0004]
That is, in a system using MPEG4, on the transmission side, a plurality of objects constituting one scene and scene description data for synthesizing these objects are encoded into elementary streams using an optimal algorithm. Then multiplex and send. On the receiving side, after each received object and scene description data are decoded, each object is synthesized according to the contents of the scene description data and output to a presentation device such as a display or a speaker.
[0005]
[Problems to be solved by the invention]
By the way, in the new satellite broadcasting system as described above, it is proposed that a plurality of broadcasting stations independently specify a broadcasting service area so that national broadcasting and regional broadcasting can be arbitrarily selected. Has been. In this case, in a mobile device-equipped terminal device, it is meaningful for the user if the necessary broadcast service can be received simultaneously with movement. Also, if integration with existing media such as terrestrial broadcasting (television broadcasting, radio broadcasting) and communication means through public communication networks can be achieved, it will provide users with a new living environment, It can contribute to development.
[0006]
Therefore, the present invention takes into consideration the above-mentioned demands, and provides a broadcasting service from a new viewpoint by fusing a plurality of broadcasting services and further fusing with existing media, and developing an information society. It is an object to provide a satellite broadcast system and a satellite broadcast receiver that can contribute to the above.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a broadcasting service that uses a broadcasting satellite arranged in a geostationary orbit and provides a broadcasting service including information on at least one of video, audio, and data on each of a plurality of channels. In a broadcasting system, among a plurality of channels of broadcast signals transmitted from the broadcasting satellite, a plurality of channels providing a broadcasting service related to each other between arbitrary channels and a channel providing a broadcasting service related to each other on a receiving side are provided. By receiving and synthesizing, the integration of multiple broadcasting services is realized.
[0008]
At this time, the related broadcasting service provides information related to communication / broadcast information other than the satellite broadcast, thereby realizing integration with other media.
[0009]
Further, in the satellite broadcast receiving apparatus used in the satellite broadcast system, the satellite broadcast that receives a plurality of broadcast services related to each other among arbitrary channels among the broadcast signals of the plurality of channels transmitted from the broadcast satellite. A receiving unit, information synthesizing means for synthesizing a plurality of mutually related broadcasting service information received by the satellite broadcasting receiving unit and presenting the information as one broadcasting service, and video and audio of the broadcasting service presented by the means By providing a display device and a sound reproduction device that presents information, information provision that combines a plurality of broadcast services is realized.
[0010]
At this time, when information related to communication / broadcast information other than satellite broadcast is provided in the satellite broadcast service, other communication / broadcast information can be acquired and presented based on the related information. By doing so, we will provide information fused with other media.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0012]
FIG. 1 is a schematic configuration diagram of a satellite broadcasting system according to the present invention. This satellite broadcasting system includes a plurality of transmission stations 10, a satellite control station 20, and a geostationary satellite 30.
[0013]
Each transmitting station 10 receives program information created / edited by a plurality of program providers, channel-multiplexes the program information, and then converts it into a broadcast signal. For example, an upstream transmission path of Ku band (12.5 to 18 GHz) Is transmitted to the geostationary satellite 30 via. As the channel multiplexing method, for example, a CDM (Code Division Multiplex) method is used. At this time, each channel is allocated to each service area, and the transmitting station 10 can select an arbitrary service area by selecting and transmitting the channel.
[0014]
The geostationary satellite 30 includes a Ku-band antenna 31 having a diameter of, for example, 2.5 m and an S-band (for example, 2.6 GHz) antenna 32 having a diameter of 15 m. The broadcast signals transmitted from the plurality of transmitting stations 10 are received by the Ku band antenna 31 and then converted into S band signals by a transponder. The converted broadcast signal is transmitted from the S-band antenna 32 to the service area designated in advance for each broadcast station via the S-band downlink transmission path. The monitoring control of the operation state of the geostationary satellite 30 is performed by the satellite control station 20.
[0015]
The diameter of the uplink transmission antenna 31 mounted on the geostationary satellite 30 may be smaller than 2.5 m class, and the diameter of the S-band antenna 32 is not limited to 15 m class but may be 8 m class.
[0016]
In the service area, for example, not only a broadcast receiving device (not shown) fixedly installed in an office or home, but also an in-vehicle or portable movable receiving terminal device 40 transmits from the stationary satellite 30 in the S band. Broadcast signals can be received. Note that a plurality of channels (for example, 30 channels) having a transmission capacity of 256 Kbps are multiplexed in the S-band downlink transmission path. MPEG4 is used as a transmission information encoding method.
[0017]
Here, the automobile equipped with the receiving terminal 40 receives a GPS signal from a GPS satellite (GS1, GS2) and acquires its current position from the terrestrial television broadcasting station 100. A terrestrial TV receiver that receives terrestrial TV broadcasts, an ITS receiver that receives ITS information from an ITS (Advanced Traffic Control Information Communication) system, and mobile communication that connects and communicates with the response server 310 via the mobile public network 300 It shall be equipped with a device.
[0018]
The configuration of the in-vehicle receiving terminal device 40 is shown in FIG. In FIG. 2, the satellite broadcast wave from the geostationary satellite 30 is received by the satellite broadcast receiver 42 via the antenna 41. The receiving unit 42 can select and receive at least two channel broadcasting services, one being sent to the first selected channel data processing unit 43 and the other being sent to the second selected channel data processing unit 44. Each of the data processing units 43 and 44 demodulates the information of the selected broadcast service, and the information obtained here is combined through an area selection unit 45 and an in-area service information selection unit 46, which will be described later, respectively. 47 to be combined into one piece of service information. Of the service information obtained here, video information is displayed on the display unit 48, and audio information is acoustically reproduced by the acoustic reproduction unit 49.
[0019]
A touch panel sensor (not shown) is provided on the display screen of the display unit 48, and a touch panel selection control unit 50 that determines user designation information from the sensor output and instructs the synthesis unit 47 to present information. Is provided. In addition, when the user designation information is connection with the response server 310, the touch panel selection control unit 50 notifies the mobile communication control device 51 of the user designation information. At this time, the mobile communication control device 51 acquires the address information of the communication destination (response server 310) from the in-area service information selection unit 46, controls the mobile communication device 58 to connect to the response server 310, and the necessary data Download or upload.
[0020]
On the other hand, the current position information by GPS obtained by the GPS receiver 53 is input to the area selection unit 45 via the antenna 52. The in-area service information selection unit 46 receives ITS information obtained by the ITS receiver 55 via the antenna 54 and terrestrial TV broadcast program information obtained by the terrestrial TV receiver 57 via the antenna 56. Is done. The ITS information and terrestrial TV program information may be input to the combining unit 47.
[0021]
In the on-vehicle receiving terminal device 40 having the above configuration, the fusion of a plurality of broadcast services will be described below.
[0022]
Now, it is assumed that a broadcast service for map information is provided through one channel, and a local broadcast service for facilities and regions is provided through another channel.
[0023]
Here, in the map information broadcasting service, as shown in FIG. 3A, the map in the service area is divided into meshes (may be a circular zone), and area numbers (1 to N) are assigned to the divided areas. In addition, as shown in FIG. At this time, the range (area) of each divided area is designated by upper left coordinates and lower right coordinates expressed by north latitude and east longitude. FIG. 4 shows the type of information and the content of information in each divided area number (area No.) of the map information. When this map information broadcast service is selected, it is demodulated by the first channel data processor 43 and sent to the area selector 45.
[0024]
The processing content of the area selection unit 43 is shown in FIG. First, from the map information, the area No. The north latitude and east longitude information of the upper left and lower right coordinates of 1 to N are acquired, and the area of each area is specified (S1). Subsequently, GPS position data (current position) is acquired from the GPS receiver 53 at regular intervals (S2).
[0025]
Next, the area No. 1 (S3), the area No. It is determined whether the current position is included in 1 (S4). If not included, the next area No. Is specified to determine whether the current position is included, and thereafter, the process is repeated until an area including the current position is found (S5 to S8). If an area including the current position is found, it is monitored whether the current position is out of the area (S9). If the area is out of the area, a new area including the current position is searched (S10), and the process of step S4 is performed. Migrate to
[0026]
While the current position is included in the area, the bitmap of the area and the surrounding eight areas is acquired and updated (S11), and the bitmap of the nine areas is developed on the internal image memory (S12). Then, the bitmap data of the display area centered on the current position is output (S13). Here, not only the area including the current position but also the bit map of the surrounding area is acquired and updated because the current position is between t1 and t2, as shown in FIG. This is because the display area can be immediately shifted to the next display area as soon as the display area is removed. In the following, for the sake of simplicity, the area No. It is assumed that i is displayed as it is.
[0027]
On the other hand, if the location information and additional information of movie theaters, convenience stores, gas stations, financial institutions, administrative organizations, etc. are provided hierarchically as the local broadcast service, the information of the local broadcast service is stored in the second channel. Demodulated by the data processing unit 44 and sent to the in-area service information selection unit 46.
[0028]
Here, as shown in FIG. 7, as the local broadcast service, a number (No.) is assigned to each service information, and the service type, location, title, response server address, and additional data are required as the type of service. Prepare accordingly. For example, service no. 1, service type is cinema, location is north latitude XX degrees, east longitude xx degrees, title is cinema 1, server address is xxx-xxxx, and additional data is still image and audio , Service No. 2, service type is convenience store, location is north latitude xx degrees, east longitude xx degrees, title is A store 1, server address is xxx-xxxxxxx-xxx, and additional data is character data It has become a content. Here, the number of service information is M.
[0029]
The processing content of the in-area service information selection unit 46 is shown in FIG. First, the area number including the current position is selected from the area selection unit 45. i area information is acquired (S21). 1 is designated (S22), and the position is the area number. It is determined whether it is in the area of i (S23). If it is not within the area, the next service information is sequentially designated, and the area No. The service information in the i area is searched (S24 to S27). If it is within the area, the service information No. A display character is selected from one service type (S28), a display position is designated, and a display character is output (S29). Subsequently, it is determined whether there is a request for additional data (S30). If there is a request, the additional data is output (S31), and if there is no request, it is determined whether there is an area change (S32).
[0030]
If the area has not been changed, the process returns to step S24 to specify the next service information and repeat the above process. If there is an area change, the process returns to step S21 to execute the process from the beginning.
[0031]
As described above, the in-area map data selected by the area selecting unit 47 and the in-area service information (display character and additional data) selected by the in-area service information selecting unit 46 are both sent to the combining unit 47. FIG. 9 shows the processing contents of the synthesis unit 47.
[0032]
In FIG. 9, first, from the map data from the area selection unit 47, the area No. The map of i is drawn (S41), and a display character is superimposed on the designated position on the map drawn based on the service information from the in-area service information selection unit 46 (S42). Here, when there is a request for reproducing additional data from the user, the presence / absence of additional data is determined (S43). If there is additional data, it is reproduced and output (S44).
[0033]
A display example of the service information created by the synthesis unit 47 is shown in FIG. In this example, a character indicating a store or public facility as a facility and its title are superimposed on the road map, and when the user selects one of them with the touch panel, the character given as additional data is displayed in a balloon format. It shows a state.
[0034]
There are various ways of presenting the additional data. For example, if text data is read out by voice, the driver does not need to look at the screen, which is preferable for safety. Further, instead of the balloon format, the image may be displayed on the entire screen or displayed in the telop format. Further, if the additional data is video, sub-screen display, split display, screen switching display, and the like can be considered.
[0035]
Here, it is desirable that the additional data conforms to the MPEG4 format. As a result, composition with other objects can be freely set.
[0036]
Further, when the access address to the response server 310 is described in the additional data and the access guide is included as the provided service information, this is presented to the user by video or audio. In this case, when the selection operation is received through the touch panel, the mobile communication device 58 is automatically connected to the response server 310 through the mobile communication control device 51, and necessary download (for example, regional information) or upload (for example, questionnaire or quiz). Replies, requests, etc.). In this way, fusion with mobile communication can be realized.
[0037]
Next, fusion with other broadcast media will be described.
[0038]
First, consider the integration with the ITS system. That is, in FIG. 2, when there is ITS information from the ITS receiver 55, the in-area service information selection unit 46 or the synthesis unit 47 identifies the traffic volume etc. from the ITS information. It is conceivable that display parts indicating the occurrence location and the like are superimposed on the drawn map and displayed on the display unit 48, or the distance to the road construction location and the location where the accident occurred and the detour guidance thereof are presented by voice. As an example, FIG. 10B shows a state in which a display component indicating a traffic jam range created from ITS information is displayed on a map created from data from the area selection unit 45 in an overlapping manner.
[0039]
Next, consider fusion with terrestrial TV broadcasting. As information that can be used as the current broadcast, text data or character data by text multiplex broadcasting can be considered. In this case, the terrestrial TV receiver 57 receives the text multiplex broadcast, and the character data is developed in a predetermined area on the screen by the in-area service information selection unit 46 or the synthesis unit 47 and is displayed on the display unit 48 in a telop format. indicate. As an example, FIG. 10C shows a state in which character data obtained by the TV receiver 55 is displayed in a telop format on a map created from data from the area selection unit 45.
[0040]
When regional information such as weather forecast is received by text multiplex broadcasting, it is more effective to decode this information and display characters on a map. Furthermore, digital broadcasting is being developed as next-generation TV broadcasting. If a program compliant with MPEG4 is provided at this time, the contents of the program can be freely and easily captured.
[0041]
In the above embodiment, the fusion with the TV broadcast has been described. Of course, the fusion with the radio broadcast can also be implemented in the same manner. In addition, if a high-definition television broadcast in other satellite broadcasts is broadcast at a low rate, the high-definition television broadcast is received and displayed while stopped or traveling at low speed, and from this satellite broadcast system during high-speed movement. Broadcasting can be received and displayed. If a mobile communication device is used, it is also possible to view a TV program distributed over the Internet or the like.
[0042]
Moreover, although the said embodiment demonstrated the case where a touch panel was utilized for a user's selection operation, a voice recognition apparatus, a remote controller, etc. can also be utilized for the selection instruction | indication input. In particular, if a voice recognition device is used, it is possible to give instructions without changing the viewpoint during driving, which is preferable for safety.
[0043]
Moreover, in the said embodiment, although all map information shall be provided in broadcast, you may make it provide the update information with respect to the map information which the existing car navigation system has.
[0044]
It is also conceivable to provide still images and text information in cooperation with radio broadcasting, or to provide program information in cooperation with television broadcasting.
[0045]
【The invention's effect】
As described above, according to the present invention, a broadcasting service from a new viewpoint is provided by contributing to the development of an information-oriented society by fusing a plurality of broadcasting services and further fusing with existing media. It is possible to provide a satellite broadcast system and a satellite broadcast receiving apparatus that can perform the above-described operation.
[Brief description of the drawings]
FIG. 1 is a system configuration diagram showing the overall configuration of a satellite broadcasting system according to an embodiment of the present invention.
FIG. 2 is a block configuration diagram showing a configuration when the satellite broadcast receiving apparatus according to the embodiment of the present invention is mounted on a moving body.
FIG. 3 is a view for explaining a method for providing map information according to the embodiment;
FIG. 4 is a diagram showing information types and information contents in each divided area number (area No.) of the map information.
FIG. 5 is an exemplary flowchart illustrating processing contents of an area selection unit according to the embodiment;
FIG. 6 is a diagram for explaining an information acquisition range of the map information.
FIG. 7 is an exemplary view showing service types and contents in each service information number of the local information service according to the embodiment;
FIG. 8 is a flowchart showing the processing contents of an in-area service information selection unit according to the embodiment;
FIG. 9 is a flowchart showing the processing content of a synthesis unit according to the embodiment;
FIG. 10 is a view showing a display example in fusion of related broadcasting services, fusion with ITS information, and fusion with terrestrial TV broadcasting according to the embodiment;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Transmitting station 20 ... Satellite control station 30 ... Geostationary satellite 40 ... Reception terminal device GS1, GS2 ... GPS satellite 100 ... Terrestrial television broadcasting station 300 ... Mobile public network 310 ... Response server 41 ... Satellite broadcast receiving antenna 42 ... Satellite Broadcast receiving unit 43 ... first selected channel data processing unit 44 ... second selected channel data processing unit 45 ... area selecting unit 46 ... in-area service information selecting unit 47 ... synthesizing unit 48 ... display unit 49 ... acoustic Saisei 50 ... touch panel Selection control unit 51 ... mobile communication control device 52 ... GPS reception antenna 53 ... GPS receiver 54 ... ITS reception antenna 55 ... ITS receiver 56 ... terrestrial TV reception antenna 57 ... terrestrial TV receiver 58 ... mobile communication device

Claims (3)

A satellite broadcasting system that uses a broadcasting satellite arranged in a geosynchronous orbit to provide a broadcasting service including information on at least one of video, audio, and data to each of a plurality of channels to a receiver mounted on a mobile body. ,
Of the broadcast signals of a plurality of channels transmitted from the broadcasting satellite, providing a broadcast service related to each other between arbitrary channels, and receiving a plurality of channels provided with a related broadcast service on the receiving side By combining, one broadcasting service shall be provided .
The broadcasting services related to each other are a broadcasting service that provides a map, and a broadcasting service that provides local information about a facility or a region located in the map,
The local information includes location data of the facility or region in the map,
The satellite broadcasting system , wherein the receiving device receives the broadcasting services related to each other while the mobile body is moving, and synthesizes and displays the map and a location of a facility or a region in the map . Utilizing the broadcast satellite to be placed in a stationary orbit, in each of a plurality of channels, video, audio, satellite television is that the mobile body-mounted using the satellite broadcasting system for providing a broadcast service including at least one information data A receiving device ,
Among the broadcast signals of a plurality of channels transmitted from the broadcast satellite, a satellite broadcast receiver that receives a plurality of broadcast services related to each other between arbitrary channels;
Information synthesizing means for synthesizing information of a plurality of related broadcasting services received by the satellite broadcasting receiving unit and presenting the information as one broadcasting service;
A display device and a sound reproduction device for presenting video and audio of the broadcast service presented by this means ;
Comprising current position information acquisition means for acquiring a current position of the mobile body,
The broadcast service related between the arbitrary channels is a broadcast service that provides a map, and a broadcast service that provides local information about a facility or a region located in the map, and the local information is the corresponding one in the map. When the broadcasting service including the location data of the facility or the area and providing the map is to subdivide the map of the entire broadcasting area and provide the location data, respectively,
The information synthesizing means includes
An area discriminating unit for discriminating a divided area of the map obtained by receiving the broadcast service of the map from the current location information obtained by the current location information obtaining unit;
Information selection means for selecting local information regarding a facility or area that falls within the area determined by the area determination means from information provided by a broadcast service of local information regarding the facility or area; and
An image composition unit that develops the map determined by the area determination unit and combines the local information related to the facility or area selected by the information selection unit in a predetermined format on the map; Satellite broadcast receiver. Receiving satellite broadcasting on mobile units used in satellite broadcasting systems that provide broadcasting services that include at least one of video, audio, and data information on multiple channels using broadcasting satellites placed in geostationary orbit A device,
Among the broadcast signals of a plurality of channels transmitted from the broadcast satellite, a satellite broadcast receiver that receives a plurality of broadcast services related to each other between arbitrary channels;
Information synthesizing means for synthesizing information of a plurality of related broadcasting services received by the satellite broadcasting receiving unit and presenting the information as one broadcasting service;
A display device and a sound reproduction device for presenting video and audio of a broadcast service presented by this means,
Public have a server that provides information related to the broadcast service through a communication network, wherein the access guidance is provided to the server in a broadcasting service Rutoki,
A communication means for communicating with the server through the public communication network;
Server access guidance presenting means provided in the information synthesizing means and presenting server access guidance provided by the broadcasting service to the user through the display device or the sound reproduction device ;
Server connection instruction detection means for detecting a server connection instruction of the user by presenting the server access guidance;
This means automatically the is connected to the server the communication unit when detecting a server connection instruction by said you characterized in that it comprises a communication control means for performing communication based on the contents of the server access guide satellite broadcasting Receiver device.

Images