JPH0767172B2 - Vehicle information receiving system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention displays a character broadcast or various information transferred from a ground station on a display device in each vehicle of a moving body, such as a train, and displays various information to passengers. The present invention relates to a new vehicle information receiving system provided.

[Conventional example] In recent years, teletext of various kinds of information has been multiplexed in television broadcasting, and this teletext can be received by a normal television receiver if a teletext adapter is provided. But now it can be used. On the other hand, various advertisements and the like are posted on the train, and these various advertisements and the like are also a kind of information source. In addition, as a service for passengers on recent trains, various information is provided to passengers by displaying, for example, a satellite broadcast received by a parabolic antenna on the television receiver (liquid crystal television) of each vehicle, which has never existed before. Some provide services.

[Problems to be Solved by the Invention] By the way, in a train which is a moving body, it is difficult to directly receive a teletext due to fading and the like, which is technically problematic.

Therefore, it is possible to receive the above-mentioned teletext while the train is stopped. However, since data for one page of teletext is transmitted in about 20 seconds, waiting time of about all pages x 20 seconds is required to receive all pages of a program. It is difficult to receive arbitrary all programs / pages of the teletext within the stop time of about one minute.

The present invention has been made in view of the above points, and an object thereof is to improve the processing efficiency of transfer data and the efficiency of data transfer, and to improve the service to passengers. To provide a receiving system.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a fixed station installed at a fixed position such as in a station yard and a train as a mobile station. Is a teletext receiving means for receiving teletext via a television antenna, a reservation memory for storing reservation information for obtaining a predetermined program from the teletext received by the teletext receiving means, and its reservation. A clock for obtaining the reception time of the program, a program memory for storing the data of all programs / all pages based on the above reservation information, an edit processing means for editing the data of the program / page, and an editing processing means. Control means for giving an individual number, reception time and address code to the train side storage means for each edited program / page, and program / page data obtained by the control means A transmitting means for transmitting an electric wave within the stop time of the train is provided, and on the train side, a receiving means for receiving the data from the fixed station and an individual number and an address code included in the received data. Storage means for storing the data of the edited program / page and the reception time in a predetermined area, and the data read from the storage means is converted into the format of the teletext standard, and The signal conversion means that superimposes the signal on the NTSC standard signal and this NTSC
The same as the transmission means that RF-modulates and transmits the standardized signal.
In a vehicle information receiving system provided with a monitor for receiving an RF modulated signal and displaying its character, reception time, etc., the edit processing means is received by the teletext receiving means based on the reservation information. The control means has a function of determining whether or not the teletext is new program / page data (new data) or updated program / page data (updated data). Each new data or update data is given an individual number of a program / page, a reception time and an address code for the train side storage means, and when transmitting from the transmission means to the train side, only the new data or update data is transmitted. It is characterized by doing so.

[Operation] With the above configuration, at the ground fixed station, while the teletext is received, the data of all the programs and pages of the station are edited, and the individual numbers are added to the edited data, respectively. The reception time and the address code of the internal memory on the receiving side of the train are added. The data of the program / page including various information is transferred to the train arriving at the station. At this time, when the above-mentioned data is edited, newly received program / page data (new data) or updated program / page data (updated data)
Is determined. Then, at the time of data transfer, only new data or updated data is transferred. In other words, data transfer can be completed in a short time,
Good transfer efficiency.

On the other hand, in the train on the receiving side, when the transfer data is received, the transferred program / page data and time data are predetermined by the individual number and address code included in the transfer data. Is stored in a predetermined area. Therefore, when only the update data is received, rewriting of the internal memory is executed in a short time. Further, the reading order of the program / page data stored in the internal memory can be arbitrarily determined. Based on the data thus read out, the character broadcasting is displayed on the monitor device provided in each car of the train, and the reception time of the character broadcasting is also displayed, so that the real-time property is important. This is useful for programs.

EXAMPLES Examples of the present invention will be described below with reference to the drawings.

In FIG. 1, a vehicle information receiving system is a ground fixed station (hereinafter referred to as a ground station) that is fixedly installed, for example, in a station yard and serially converts received data such as information received via a teletext or a telephone line and transmits it. 1) and a train 2 that receives a signal from the ground station 1, stores the received data, and displays teletext or predetermined information on a display device based on the stored data. It is configured.

The ground station 1 receives a character broadcast received via the TV anthere 3, stores data of all arbitrary programs / pages, edits the stored programs / pages, and edits the edited programs.・ A teletext receiver 4 that adds individual numbers, reception times and addresses to pages to convert it into serial transfer data (“1”, “0” signals) in a predetermined format, and this serial transfer data via radio waves or Various control instructions for the signal transmitting / receiving device 5 for transmitting by light, the monitor device (liquid crystal display device) 6 for displaying the received character broadcast or the character broadcast based on the edited data, and the character broadcast receiver 4. And a remote controller 7 for sending out.

Further, as shown in FIG. 2, the teletext receiver 4
Includes a TV tuner unit 8 for receiving a television broadcast of a predetermined channel via the television antenna 3, and a character signal of a character broadcast multiplexed in the received TV broadcast, and can be displayed on the monitor device 6. A decoder section 9 as a signal, a transmission program reservation memory section 10 for storing the reservation information of all programs / pages, and a program memory 11 for storing data of all programs / pages according to the reservation information,
There is provided a clock unit 12 for obtaining the reception time (hours and minutes) of the predetermined program by the decoder unit 9. In addition,
The decoder unit 9 includes a character signal separation unit 13 and an error correction unit.
14, buffer RAM15, program ROM16, work RAM17, C
RTC (controller) section 18, video RAM19, DRCS RAM20,
RGB encoder 21, RGB21 pin interface 22, interface circuit (for melody / remote control) 23, interface circuit (for printer) 24, and control unit (processing MP)
U) 25 are provided, which are connected via bus lines 26, 27. The CRTC unit 18, the video RAM 19 and the interface circuit 23 are used for displaying and confirming a program page based on the data stored in the program memory 11, for example. Further, the signal transmission / reception device 5, the transmission program reservation memory unit 10, the program memory 11 and the clock unit 12 are connected to the bus line 26, and are controlled by the control unit 25 according to an instruction from the remote controller 28.

The train 2 is composed of a plurality of connected vehicles A, ..., N, and the transfer data from the ground station 1 is received by radio waves at a predetermined portion of the train 2 and the data is serially restored. A receiver 29 is provided. In the passenger compartment 30 of the train 2, the data of the teletext program / page (data of the character signal) and the data of the reception time are obtained from the restored serial data and included in the serial data. Stored in a predetermined area of the internal memory that is predetermined based on the individual number and the address code, and read the stored data sequentially to form a data string (data packet) in the signal format of the teletext standard,
A character signal generator 31 that superimposes and outputs this data string on an NTSC standard video signal, and a transmitter that converts the video signal on which the data string of the character broadcast or other information is superposed into an RF signal and outputs it. (RF modulator) 32 and VTR device 3 for outputting a video signal from an ordinary video cassette or the like to the transmission unit 13 thereof
3 and are provided. In addition, each vehicle A, ..., N has its RF
A distributor 34 for distributing signals, a plurality of character receivers 35 for respectively decoding character broadcast, reception time or video of a video cassette by the distributed RF signal, and those character broadcasts, other information and video cassette A plurality of monitor devices 36 for respectively displaying images and the like are provided, and the distributor 34 and the transmitter 32 are connected via a cable (coaxial cable) 37 and a booster 38.

Next, the operation of the vehicle information receiving system having the above configuration will be described based on the flowchart of FIG.

First, in the ground station 1, assuming that a television broadcast of a predetermined channel is received via the antenna 3, the decoder unit 9 extracts a text broadcast multiplexed with the television broadcast (step ST1). . At this time, the control unit 25
At step ST2, the program memory 11 stores data of a predetermined program / page according to the reservation information stored in the transmission program reservation memory unit 10 (step ST2). Then, it is judged whether or not the train 2 has arrived at the station (step ST
3) If not arrived, the process returns to step ST1 and the above steps are repeated. In this way, until the train 2 arrives at the station, the program memory 11 stores predetermined all programs / all pages of data according to the reservation information stored in the transmission program reservation memory unit 10. In addition, all the predetermined programs
When storing the data of all pages, when a new program is received, the new program (new data) is stored, and when the program is already stored, the data is changed. Stored programs (updated data) are stored. Such an edit processing program is stored in the program ROM 16, and this edit processing is executed by the program using the work RAM 17. Further, in the clock unit 12, the reception time of the program stored in the program memory 11 is obtained.

Subsequently, in step ST3, when it is determined that the train 2 has arrived at the station (communication range), the train code transmitted from the train 2 or the code of a predetermined program of teletext is received. (Step ST4). As a result, the ground station 1 can identify what data is being transferred to the train 2 by the train code or the code of the predetermined program, and what program data should be transferred? You can judge.

Next, the edited data of the predetermined program / page is read from the program memory 11, and the individual number of the program / page, the reception time, and the address code of the internal memory of the character signal generator 31 are added to the data. (Step ST5). The signal transmitter / receiver 5 transfers the data including the individual number, the reception time data and the address code (step ST6). At this time, only the necessary data such as the new program / page (new data) and the updated program / page data (updated data) stored in the program memory 11 are transferred. At least, the efficiency of the data transfer can be improved.

In the teletext receiver 4 of the ground station 1, the received teletext can be displayed on the monitor device 6 as in the conventional case, and the edited program stored in the program memory 11 can be displayed on the monitor device 6. Can be displayed on. Therefore, the teletext stored in the program memory 11 can be displayed and confirmed on the monitor device 6 before being transmitted to the train 2.

On the other hand, in the arriving train 2, the data by the radio wave is received, the serial data is restored from the received signal, and the data of the predetermined program / page and the reception time are written based on the individual number and the address code. Since it is stored in a predetermined area of the internal memory of the signal generator 31,
It is possible to prevent the same program page that has already been stored from being stored twice. Further, since data of a predetermined program / page is stored in a predetermined area of the internal memory of the character signal generator 31, when only update data of the program / data is transferred, it is included in the transfer data. Depending on the address code, the internal memory can be rewritten efficiently. Further, the order of reading program / page data can be arbitrarily determined by an instruction from the conductor or the like.

Subsequently, the data read from the internal memory of the character signal generator 31 is converted into a data string (data packet) in the signal format of the character broadcasting standard, and these data strings are NT
It is superimposed on the SC standard video signal. This video signal is RF
Modulated, each vehicle A, via cable 37, booster 38
…, Sent to N. Then, the character receiver of each vehicle A, ..., N
At 35, the RF modulated signal is received via distributor 34. Since these character receivers 35 have a built-in television tuner in addition to a character broadcasting decoder, the character broadcasting superimposed on the video signal is displayed on the monitor device 36 by channel switching. At this time, the monitor device 36
Since the reception time of the program / page is displayed in addition to the teletext program / page, it is useful in the case of a program that places importance on real-time property, and is extremely useful from the viewpoint of service to passengers.

[Effects of the Invention] As described above, according to the vehicle information receiving system of the present invention, the data transferred from the ground station to the train side is edited to, for example, new data or update data of a teletext program / page. And, since the new data and update data are added to the reception time of the program and the address code of the memory on the receiving side and transferred to the receiving side of the train, the data transfer time can be shortened, Moreover, it is possible to improve the data processing efficiency on the transmitting side and the receiving side. Further, since the reception time is displayed on the display device of the train together with the program / page, there is a useful effect in the case of a program of which real time is important.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of a vehicle information receiving system showing an embodiment of the present invention, FIG. 2 is a block diagram of a ground fixed station of the vehicle information receiving system, and FIG. 3 is an operation of the vehicle information receiving system. It is a flow chart figure for explaining. In the figure, 1 is a ground fixed station (ground station), 2 is a train (moving body), 3 is a television antenna, 4 is a teletext receiver, 5 is a signal transmitter / receiver, 6 and 36 are monitor devices, 7 is a remote controller, 9
Is a decoder unit, 10 is a reserved memory unit (for a transmitted program), 11 is a program memory, 12 is a clock unit, 29 is a receiving unit, 31 is a character signal generating unit, 32 is a transmitting unit (RF modulator), and 33 is a VTR. A device, 34 is a distributor, 35 is a character receiver, 37 is a cable (coaxial), and 38 is a booster.

Claims (1)

[Claims] 1. A teletext reception for receiving a teletext via a television antenna, which includes a fixed station installed at a fixed position such as in a station yard and a train as a mobile station. Means, a reservation memory for storing reservation information for obtaining a predetermined program in the teletext received by the same teletext receiving means, a clock for obtaining the reception time of the reserved program, and the reservation information. A program memory for storing data of all programs / pages based on the program, editing processing means for editing the data of the program / page, an individual number for each program / page edited by the editing processing means, a reception time and the above Control means for giving an address code to the train side storage means and transmission means for transmitting the program / page data obtained by the control means by radio waves during the train stop time are provided. The train side predetermines the receiving means for receiving the data from the fixed station and the edited program / page and reception time data by the individual number and address code included in the received data. Storage means for storing in the area, a signal conversion control means for converting the data read from the storage means into the above-mentioned teletext standard format and superimposing the signal on the NTSC standard signal, In the vehicle information receiving system, which is provided with a transmitting means for RF-modulating and transmitting a signal of NTSC standard, and a monitor for receiving the RF-modulated signal and displaying the characters and the reception time thereof, The means is a program for which the teletext received by the teletext receiving means is a new program based on the reservation information.
It has a function to determine whether it is page data (new data) or updated program / page data (updated data), and the control means adds the program to the new data or updated data, respectively. A feature that an individual number of a page, a reception time and an address code for the train side storage means are given and only new data or updated data is transmitted when the transmission means transmits to the train side. Vehicle information receiving system.