JP2005203911A - In-train broadcast system and broadcast method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an in-train broadcast system for carrying out unique broadcasting for mobile terminals existing in a train, capable of supplying newest program data at all times, and allowing possessors of the mobile terminals to attain the reception of broadcast without the need for channel selection even when a broadcast area is moved. <P>SOLUTION: The in-train broadcast system includes: a center station 10 for storing program data; principal stations 40 or train sheds 30 for receiving the program data from the center station; and the trains 60 for receiving and storing the program data from the principal stations or the train sheds and transmitting the stored program data to the mobile terminals 67, and each of the principal stations or train sheds includes a station office server 41 or a train shed server 31 for updating the program data which the trains have. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an in-train broadcasting system and a broadcasting method thereof, and more particularly, to an in-train broadcasting system and an broadcasting method for performing independent broadcasting on a mobile terminal existing in a train.

  An example of this type of prior art is described in Patent Document 1. The technology is to receive a television broadcast or the like with a portable receiver in a railway vehicle. This is an example of a retransmission system in a railway vehicle.

  Another example is described in Patent Document 2. The technology amplifies a television signal received by a railway vehicle and sends it into the vehicle.

  Another example is described in Patent Document 3. The technology distributes information that suits individual passengers' preferences on trains and the like.

  Another example is described in Patent Document 4. In the technology, constantly distributed data is broadcast from the train data server to the vehicle data relay device, and the vehicle data relay device extracts the distribution data specified by the data distribution request from the portable information terminal from the constantly distributed data, This is returned to the portable information terminal.

  Another example is described in Patent Document 5. The technology is to distribute television broadcasts from the center system to the vehicle broadcast system via the station broadcast system.

Japanese Patent Laid-Open No. 6-252781 (paragraph 0008, FIG. 3) JP 2002-111609 (paragraphs 0031 and 0032, FIG. 1) JP 2002-190764 (paragraphs 0022 to 0025, FIGS. 3 and 4) JP 2001-77774 A (paragraph 0008, FIG. 1) Japanese Patent Laying-Open No. 2003-179899 (paragraph 0031, FIG. 1)

  However, the technique described in Patent Document 1 may not be able to be seen when a train enters a tunnel or when the train moves.

  In addition, as in the technique described in Patent Document 1, the technique described in Patent Document 2 may not be able to be broadcast when the train enters the tunnel.

  In addition, the technique disclosed in Patent Document 3 is personal information distributed, not broadcasted.

  Further, as in the technique described in Patent Document 3, the technique described in Patent Document 4 is distributed as personal information, not broadcasted.

  Further, the technique described in Patent Document 5 has no description regarding update of program data.

  In other words, the conventional in-train broadcasting service retransmits programs from existing broadcasting stations, which is costly for railroad companies, and if the train moves, it will be outside the broadcasting area of the program being watched. Sometimes. On the other hand, a service for browsing stored data, such as that performed on an aircraft, involves the introduction cost of a receiving terminal installed in the vehicle, and also cannot cope with programs that frequently update information such as news programs. was there.

  Therefore, an object of the present invention is to perform independent broadcasting to mobile terminals existing in the train, always supply the latest program data, and the owner of the mobile terminal performs channel selection work even if the broadcasting area moves. It is an object of the present invention to provide an in-train broadcasting system and a broadcasting method thereof that can receive broadcasting without performing it.

  In order to solve the above problems, an in-train broadcasting system according to the present invention is an in-train broadcasting system that performs independent broadcasting to a mobile terminal existing in a train, and includes a center station that stores program data, and the center station. A main station or garage that receives the program data, and a train that receives and accumulates the program data from the main station or garage and transmits the accumulated program data to the mobile terminal. The garage includes update means for updating program data of the train.

  The in-train broadcasting method according to the present invention is an in-train broadcasting method for performing independent broadcasting to a mobile terminal existing in a train, the center station having a step of storing program data, and the program data from the center station. A main station or garage having a step of receiving the program data, and a train having a step of receiving and storing the program data from the main station or garage and transmitting the stored program data to the mobile terminal, The main station or garage includes an update step for updating program data of the train.

  According to the present invention, the mobile terminal existing in the train is uniquely broadcast, the latest program data can always be supplied, and the owner of the mobile terminal performs channel selection work even when the broadcast area moves. The broadcast can be received without any problem.

  In other words, according to the present invention, since the railway company uses a portable television receiving terminal etc. possessed by the passenger and performs the program production cost with commercial advertisement revenue, the broadcasting service is provided to the passenger without incurring costs. There is an effect that the train service can be improved.

  In addition, there is an effect that the passenger can watch the same program stably without being affected by a location where a normal television broadcast cannot be received such as in a tunnel, or a change in broadcast contents accompanying a train movement. In particular, the latest information such as news programs can be obtained by updating data at major stations.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a configuration diagram of an example of an in-train broadcast system according to the present invention. Referring to the figure, the in-train broadcast system includes a center station 10, a garage 30, a main station 40, and a train 60.

  The center station 10 is provided with a video tape recorder (hereinafter referred to as VTR) 11, an encoder (hereinafter referred to as ENC) 12, and a center server 13. The VTR 11 is a deck that plays the VTR tape 1. The ENC 12 is a device that encodes the program video and audio contained in the VTR tape 1 into a simple moving picture transport stream (hereinafter referred to as TS), and the center server 13 is a program data in the TS file format that has become a simple moving picture. Is stored and transferred.

  A garage server 31 and a garage access point (hereinafter referred to as AP) 32 are installed in the garage 30, and a station building server 41 and a station building AP 42 are installed in the main station 40.

  The center server 13, the garage server 31, and the station building server 41 are connected to the Internet or the like via a LAN (local area network) 20, and broadcast program data transmitted from the center server 13 is received by the garage server 31 and the station building server 41. And can be accumulated.

  The train 60 includes a train AP 61, a program operation terminal 62, an in-car server 63, a multiplexer (hereinafter referred to as MUX) 64, an OFDM (optical frequency division multiplexing) modulator 65, and a U / C PA (up converter). and power amplifier) 66 are installed.

  The train AP 61 is network-connected to the garage AP 32 and the station building AP 42 via the ultrahigh-speed wireless LAN 50, and can transfer the program list and program data from the garage server 31 and the station building server 41 to the program operation terminal 62 and the in-vehicle server 63 via the network 70. It is like that. The program operation terminal 62 has a function of knowing the train operation position.

  In accordance with an instruction from the program operation terminal 62, the in-vehicle server 63, the MUX 64, and the OFDM modulator 65 perform transmission, multiplexing, and modulation of the program. The modulated wave is transmitted into the train using an IF (intermediate frequency) transmission line 80 such as a coaxial cable or an optical cable laid in the train, and broadcasts with a weak radio wave 90 from the U / C PA 66 installed in each vehicle. carry out. The portable terminal 67 with a terrestrial digital TV reception function carried by the passenger receives the weak radio wave 90 and operates.

  In this embodiment, a portable terminal with a terrestrial digital TV reception function or a portable telephone with the above function will be described as an example of a portable terminal, but the present invention is not limited to this. For example, a portable terminal with a digital radio receiver function ( The present invention can also be applied to a PDA (personal digital assistant) or a mobile phone with the above functions. It goes without saying that the U / C PA 66 performs broadcasting using a frequency that can be received by the portable terminal 67 with a terrestrial digital TV reception function.

  Next, the operation of this embodiment will be described in detail with reference to FIGS. FIG. 2 is an operation flowchart showing an operation for transmitting program data from the encoder 12 to the in-vehicle server 63, and FIG. 3 is an operation flowchart showing an operation for transmitting program data from the program operation terminal 62 to the portable receiving terminal 67.

  First, the program producer plays the VTR tape 1 containing the program material on the VTR 11 and encodes it into a simple moving image on the ENC 12 (step A1). The program data that has become a simple moving image file is stored in the center server 13 (step A2) and then transferred to each garage server 31 and station building server 41 as necessary (step A3). The garage server 31 and the station building server 41 receive and store the received program data (step A4), and create a program list that is a list of program data stored in its own server (step A5).

  When the train 60 returns to the garage 31 or stops at the main station 40 during operation and enters the area of the garage AP32 and the station building AP42, the garage server 31 and the station building server 41 recognize this (step A6). The garage server 31 and the station building server 41 request the program operation terminal 62 to transmit the program list possessed by the program operation terminal 62 (step A7). The program operation terminal 62 that has received the request transmits a program list (step A8), and the garage server 31 and the station building server 41 receive the request and check the difference from the latest program list in its own server (step A9). . Information on the program list data that needs to be updated is transmitted to the program operation terminal 62 (step A10), and the corresponding program data is transmitted to the in-vehicle server 63 (step A12). The program operation terminal 62 and the in-vehicle server 63 receive the updated latest program list and the latest program data, respectively, and update the data (step A11 and step A13).

  Broadcasting in the train is operated by an instruction from the program operation terminal 62. First, the program operation terminal 62 confirms the train operation position (step B1). The program operation terminal 62 confirms the broadcast start time and program length from the program list (step B2), determines an appropriate frequency (broadcast channel) that is not affected by external radio waves during the program broadcast from the train position, and broadcasts at that frequency. The U / C PA 66 is instructed to do so (step B3). Thereafter, the program operation terminal 62 instructs the in-vehicle server 63 of setting values such as program start time, corresponding program data, and PSI (program specific information) necessary for broadcasting (step B4). The in-vehicle server 63 sends the program to the MUX 64 using the instructed value (step B5), and the MUX 64 multiplexes the program data (step B6) and sends it to the OFDM modulator 65 (step B7). The OFDM modulator 65 ODFM modulates the multiplexed program data and transmits it (step B8). The U / C PA 66 up-converts the received signal to the frequency designated by the program operation terminal 62 (step B9) and broadcasts it with weak radio waves (step B10). Passengers in the train can watch programs broadcast on the mobile terminal 67 with a terrestrial digital TV reception function such as a mobile phone that they have (step B11).

  If the broadcast channel of the program is changed due to movement of the train during the same program broadcast, the channel hopping function of the portable terminal 67 with digital terrestrial TV reception function (the program data transmission frequency has been changed) In this case, the channel is automatically tracked without the viewer's operation using a frequency tracking function that automatically tracks the changed frequency.

  As described above, according to the first embodiment, passengers in the train can receive the latest information using the mobile terminal, whether the train is moving or entering the tunnel.

  The second embodiment differs from the first embodiment described above in terms of broadcasting in a fixed station, not in a moving train.

  FIG. 4 is a block diagram of an example of a station premises broadcasting system according to the present invention. In the figure, the same components as those in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted. Referring to FIG. 4, the station premises broadcasting system includes a center station 10 and a main station 40.

  Since the configuration of the center station 10 is the same as that of the first embodiment, its description is omitted.

  In the main station 40, a station building server 41, a station building AP 42, a station program operation terminal 43, a station broadcasting server 44, a station MUX 45, a station OFDM modulator 46, and a station U / C PA 47 are installed.

  The center server 13 and the station building server 41 are connected to the Internet or the like via the LAN 20 so that broadcast program data sent from the center server 13 can be received and stored by the station building server 41.

  The station building server 41 can transfer a program list and program data to the station program operation terminal 43 and the station broadcasting server 44 via the local network 100.

  In response to an instruction from the station program operation terminal 43, the station broadcast server 44, the station MUX 45, and the station OFDM modulator 46 transmit, multiplex, and modulate the program. The modulated wave is transmitted to the station U / C PA 47 using the IF transmission path 101 such as a coaxial cable or an optical cable installed in the station premises, and the station U / C PA 47 broadcasts with the weak radio wave 102. The portable terminal 48 with a terrestrial digital TV reception function possessed by a customer in the station premises receives the weak radio wave 102 and operates.

  Next, the operation of this embodiment will be described in detail with reference to FIG. FIG. 5 is an operation flowchart showing an operation of transmitting program data from the station building server 41 to the portable receiving terminal 48.

  Since the operations up to step A5 in FIG. 2 are the same as those in the first embodiment, the description thereof will be omitted, and the operations from the next step will be described below.

  First, the station building server 41 requests a program list from the station program operation terminal 43 (step C1), and the station program operation terminal 43 returns the list (step C2). The station building server 41 collates the list (step C3) and then transmits the difference (step C4). The station program operation terminal 43 updates the list (step C5). Further, since the station building server 41 transfers the program data to the station broadcasting server 44 (step C6), the station broadcasting server 44 updates the data (step C7).

  The station program operation terminal 43 confirms the broadcast start time and the program length from the program list (step C8), and then instructs the station broadcast server 44 to set the program start time, the corresponding program data, and the PSI necessary for broadcasting. (Step C9). The station broadcasting server 44 sends the program to the station MUX 45 using the instructed value (step C10), and the station MUX 45 multiplexes the program data (step C11) and sends it to the station OFDM modulator 46 (step C12). ). The station OFDM modulator 46 ODFM-modulates the multiplexed program data and transmits it (step C13). The station U / C PA 47 up-converts the received signal to a predetermined fixed frequency (step C14) and broadcasts it with weak radio waves (step C15). A customer in the station can watch a program broadcast on the portable terminal 48 with a terrestrial digital TV reception function such as a cellular phone held by the customer (step C16).

  As described above, the broadcasting of the second embodiment is almost the same as that of the first embodiment. However, since the station does not move, it is not necessary to check the train position and change the frequency. Therefore, the station U / C PA 47 broadcasts at a fixed frequency designated in advance.

  Thus, according to the second embodiment, customers in the main station can receive the latest information using the mobile terminal.

It is a lineblock diagram of an example of the in-train broadcasting system concerning the present invention. It is an operation | movement flowchart which shows the operation | movement which transmits program data from the encoder 12 to the in-vehicle server 63. It is an operation | movement flowchart which shows the operation | movement which transmits program data from the program operation terminal 62 to the portable receiving terminal 67. FIG. It is a block diagram of an example of the station premises broadcast system which concerns on this invention. It is an operation | movement flowchart which shows the operation | movement which transmits program data from the station building server 41 to the portable receiving terminal 48. FIG.

Explanation of symbols

10 Center station 11 VTR
12 Encoder 13 Center server 20 LAN
30 Garage 31 Garage Server 32 Garage AP
40 Main Stations 41 Station Building Server 42 Station Building AP
43 Station program operation terminal 44 Station broadcast server 45 Station MUX
46 Station OFDM modulator 47 Station U / C PA
48 Mobile terminal with digital terrestrial TV reception function 60 Train 61 Train AP
62 Program operation terminal 63 In-car server 64 MUX
65 OFDM modulator 66 U / C PA
67 Mobile terminal with terrestrial digital TV reception function 80 IF transmission path 101 IF transmission path

Claims (12)

An in-train broadcasting system that performs independent broadcasting to mobile terminals that exist in the train,
A center station that stores program data;
A main station or a garage that receives the program data from the center station;
Receiving and storing the program data from the main station or garage, and including a train that transmits the stored program data to the mobile terminal,
The in-train broadcasting system according to claim 1, wherein the main station or garage includes update means for updating program data of the train. 2. The train according to claim 1, further comprising transmission frequency changing means for changing a transmission frequency of the program data so as not to receive external radio wave interference while broadcasting the program data from a current train position. Broadcast system. The mobile terminal includes a function of receiving program data of an existing broadcast station, and the train transmits the stored program data using a frequency at which the program data of the existing broadcast station is transmitted. Or the in-train broadcasting system of 2. The in-train broadcast system according to any one of claims 1 to 3, wherein when the transmission frequency of the program data is changed, the portable terminal includes a frequency follow-up unit that automatically follows the changed frequency. . 5. The independent broadcasting is carried out for a mobile terminal existing in the main station in place of the mobile terminal existing in the train, including the function of the train in the main station. The in-train broadcast system described in Crab. The in-train broadcast system according to any one of claims 1 to 5, wherein the portable terminal includes a reception function for terrestrial digital television broadcasting. An in-train broadcasting method that performs independent broadcasting to mobile terminals existing in the train,
A center station having a step of storing program data;
A main station or a garage having a step of receiving the program data from the center station;
Receiving and storing the program data from the main station or garage, and including a train having a step of transmitting the stored program data to the mobile terminal,
The in-train broadcast method, wherein the main station or garage includes an update step of updating program data of the train. 8. The train according to claim 7, further comprising a transmission frequency changing step of changing a transmission frequency of the program data so as not to receive external radio wave interference during broadcasting of the program data from a current train position. Broadcast method. 8. The portable terminal includes a function of receiving program data of an existing broadcast station, and the train transmits the stored program data using a frequency for transmitting the program data of the existing broadcast station. Or the in-train broadcast method of 8. 10. The in-train broadcast method according to claim 7, further comprising: a frequency tracking step of automatically tracking the changed frequency when the transmission frequency of the program data is changed. . The function which the said train has in the said main station is replaced with the portable terminal which exists in the said train, and it independently broadcasts with respect to the portable terminal which exists in the said main station, Any one of Claim 8-10 characterized by the above-mentioned. The in-train broadcast method described in Crab. The in-train broadcasting method according to claim 7, wherein the portable terminal includes a reception function of terrestrial digital television broadcasting.

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