JPH01288190A - Information transmitter - Google Patents

Abstract

PURPOSE:To watch other channel continuously even during override from other terminal equipment by using an address signal included in a control signal sent from a central control unit so as to designate a terminal equipment and using only the terminal equipments to attain override reception. CONSTITUTION:In an information transmitter sending plural channels of video signals (or audio signals) from a central control unit 1 to plural terminal equipments 6a, 6b, 6c,..., a prescribed control signal including an address signal from the central control unit 1 is sent to switch the video signal (or audio signal) channel received by any of a terminal equipment designated by the address signal forcibly into a specific channel. When all plural terminal equipments are designated by the address signal, the equipments 11-13 of the video signals (or audio signals) other than the received specific channel are brought into pause or stop state. When a part of the plural terminal equipments is designated by the address signal, the equipments 11-13 of the video signal (or audio signal) other than the specific channel to be received are brought into the reproduction state.

Description

[Detailed description of the invention] The present invention will be explained in the following order.

A. Field of industrial application B. Overview of the invention C. Prior art D. Problem to be solved by the invention E. Means for solving the problem F. Effect G. Example G1. Description of central control unit G, description of terminal device G, terminal Explanation G when operating the device, Explanation H when overriding H Effect of the invention A Industrial field of application The present invention provides a method for controlling multiple terminals from a central control device to terminal devices provided for each passenger seat of an aircraft, train, bus, etc. The present invention relates to an information transmission device suitable for use in transmitting channel video signals and the like.

B. Summary of the Invention The present invention provides video signals (or audio signals) of multiple channels from a central control device installed in a crew cabin etc. to multiple terminal devices installed in each passenger seat of an aircraft, train, bus, etc.
In an information transmission device that transmits information, by transmitting a predetermined control signal including an address signal from the central control device, the channel designated by this address signal and received by the terminal device is forcibly switched to a specific channel, and the central control device When this forced channel switching by the device is performed by specifying all of a plurality of terminal devices, the transmitter of the signal of the channel other than the specific channel to be received is placed in a pause or sped state, and central control is performed. When this forced channel switching by the device is performed by specifying some of the plurality of terminal devices, by setting the transmitter of the signal of the channel other than the specific channel to be received to the reproduction state, The central control unit finely controls forced reception at each terminal, improving service to passengers.

C. Prior Art For example, U.S. Pat. No. 4,647,980 teaches providing separate video displays for passenger seats in vehicles such as aircraft. That is, video displays as terminal devices are individually installed in the passenger seats, and a plurality of video signals are transmitted in parallel from a central control unit to these video displays, and each video display side:
One of the signals is selected and displayed.

In this case, the video signals transmitted from the central control unit may include entertainment programs such as movies, as well as information that must be conveyed to passengers, such as various in-flight instructions such as how to put on a life jacket. . When transmitting information that must be conveyed to passengers, the reception channel on the video display side of each seat is forcibly switched to a channel from which this information can be obtained under control from the central control unit. So-called override reception was used to force reception.

D. Problems to be Solved by the Invention In the conventional system, this override reception was performed by forcing the video displays of all seats to perform forced reception at the same time. However, in reality, it is often the case that you only want to send a message to some passengers, and if you try to send a message to some passengers by using this override reception for all seats, you may want to send a message to some passengers who do not need this message. had the inconvenience that viewing a movie or the like would be interrupted by override reception.

In view of the above, it is an object of the present invention to provide an information transmission device of this type that can finely control override reception and improve serviceability.

E Means for Solving the Problems The information transmission device of the present invention, as shown in FIG. 1, for example, has a central control device (1) to a plurality of terminal devices (6a).

(6b), (6c) ... In an information transmission device that transmits video signals (or audio signals) of multiple channels, transmitting a predetermined control signal including an address signal from the central control device (1). Therefore, the terminal devices (6a), (6b), (6C
)... Video signal channel (
or audio signal channel) to a specific channel, and this forced channel switching by the central controller (1) is performed by the plurality of terminal devices (6a), (6b).
.

(6C)... When all of the above are specified by the address signal, the transmitters (11) to (13) of the video signal (or audio signal) other than the specific channel to be received.
) into a pause or stop state, and the central control unit (1)
When this forced channel switching is performed by specifying some of the terminal devices (6a), (6b), (6c), etc. by the address signal, the Video signal (or audio signal)
The transmitters (11) to (13) are placed in a reproducing state.

F. Effect According to the information transmission device of the present invention, by specifying the terminal device to which the override reception is to be performed by the address signal included in the control signal transmitted from the central control device (1), this terminal device to which the message etc. is to be transmitted can be sent. Override reception is performed. And all the terminal devices (6a),
When override reception is performed in (6b), (6c)...-, the video signal transmitters (11) to (13) of other channels are put into a pause or stop state, so when this override reception is completed, On each terminal device (6a), (6b), (6c), etc., it is possible to view the continuation of the video that was being viewed immediately before override reception started. In addition, when override reception is performed only in some terminal devices (for example, terminal device (6a)), the video signal transmitter (11) of the other channel
~(13) continues playback, so another terminal device (6b)
, (6c)..., you can continue to watch other channels even during this override.

G. Embodiment Hereinafter, one embodiment of the information transmission device of the present invention will be described with reference to the accompanying drawings.

This example is a transmission device that transmits video signals, audio signals, etc. in an aircraft.

G. Description of Central Control Unit First, the central control unit will be explained. In Figure 1, (1
) indicates a central control device installed in the crew cabin, etc., and this central control device (1) is connected to four video tape recorders (
(hereinafter referred to as VTR). That is, the first, second and third tape cassettes on which the movie is recorded are loaded.
T R (11), (12) and (13),
An override V-T loaded with a tape cassette containing necessary instructions during flight, such as how to put on a life jacket.
R(14). In this example, each of these V
TRs (11) to (14) use a reproduction signal that can provide a video signal and 3 channels (3 types) of audio signals synchronized with the video signal. As for the audio signals of these three channels, it is possible to obtain monaural audio of the three national languages corresponding to the movie, or to obtain stereo audio of one of the three national languages and monaural audio of the other national languages. It will be done.

In addition, a still image transmitter (15
), a television tuner (16) that receives regular television broadcasts during waiting times at the airport, and a video camera (16) installed inside the cockpit that records takeoff and landing.
17), a microphone (18) for guiding passengers, and an in-flight device that controls the operation of each device, controls overrides (described later), aggregates data from each terminal device, creates text information to be supplied to each terminal device, etc. Master controller for management (19
), a keyboard (20) that is connected to this master controller (19) and instructs various operations to be described later, and a monitor receiver that is connected to this master controller (19) and displays the total results etc. of this master controller (19). (21). Equipment (11) to (21) such as
is the system controller (
10), and each VTR (11) is connected to the master controller (19) via the system controller (10) in response to operation commands from the keyboard (20).
~ (14), still image transmitter (15), TV tuner (
A control signal is supplied to each VTR (16) and a video camera (17), and this control signal causes each VTR (1
1) to (14) supply video and audio signals from playback, the still image transmitter (15) supplies a still image video signal, and the TV tuner (16) supplies a TV broadcast signal (video signal). and audio signals), and a video signal taken from the video camera (17) is supplied.

Furthermore, an audio signal is supplied from the microphone (18). Furthermore, character information is supplied from the master controller (19) to the system controller (10). and,
By operating the keyboard (20), the video signal supplied to the system controller (10) mentioned above and the character information sent from the master controller (19), data transmitter (27), etc. are confirmed on the monitor receiver (21). can.

(22) indicates a printer connected to the master controller (19);
Print out the aggregated data etc.
It can be converted into a copy.

In addition, this central control unit (1) can be equipped with seven ROM cards (IJ), and in this example, seven game ROMs each storing a different video game program.
Cartridge (23a), (23b) - (23g)
Attach. And such ROM cartridge (23
a) The computer program data read from (23g) is sent to a data transmitter (27), which will be described later.
supplied to

Further, (24) indicates a floppy disk drive device connected to the master controller (19), and the data stored in the floppy disk attached to this floppy disk drive device (24) is transferred to the master controller (24).
19) to the system controller (10), and new data can be stored or stored data can be modified by operating the keyboard (20).

During this memory operation or correction operation, the monitor receiver (21
) so that the data can be confirmed. In this example, a floppy disk storing data such as a meal menu is attached to the drive device (24).

Further, (25) and (26) indicate audio playback machines each equipped with three compact disc players and three tape playback devices (six in total); these sound playback machines (25) and (26) are system By supplying control signals from the controller (10), six sets of stereo audio signals (i.e., 12 channels of audio signals) are simultaneously played from six units, and the six sets of reproduced stereo audio signals are transferred to the CAD, which will be described later.
The signal is supplied to the A encoder (28).

Further, (27) indicates a data transmitter, and by supplying a control signal from the system controller (10),
Data such as a video game program is read from the ROM cartridges (23a) to (23g), and after the read data is subjected to predetermined processing, it is supplied to the CADA encoder (28).

Further, (28) is a CADA encoder used in a conventionally well-known cable digital audio/data transmission system (CADA system). The CADA system, for example, time-division multiplexes multiple digital audio signals and transmits them using the band (6M) lz) of one vacant CATV TV channel.It allows music, etc., to be transmitted in extremely high quality without sacrificing sound quality. It is a system that can transmit data efficiently. In this example, the bandwidth of two television channels is used to increase the amount of transmission. CA
The D^encoder (28) is configured with an A/D converter and a shift register, converts a plurality of audio signals into digital signals with the A/D converter, and manually inputs each signal to a predetermined position of the shift register in parallel. At the same time, the shift register is configured to perform time division multiplexing by serially outputting signals at high speed. Note that not only digital audio but also control data and computer program data are multiplexed.

The above-mentioned audio signal and text information such as a meal menu are supplied to the system controller (10).

Data such as a video game program and an override control signal to be described later are supplied to this CADA encoder (28), and the audio signal and data are multiplexed in a time division manner and output as a multiplexed signal SCA.

That is, as audio signals supplied to the system controller (10), for example, three channels (total one
2 channels) of audio signals, 6 sets of stereo audio signals (12 channels of audio signals) from the audio players (25) and (26), and 1 channel each from the TV tuner (16) and microphone (18). total of 2 with the audio signal of
There are 6 channels of audio signals. These 26 channels of audio signals are time-division multiplexed with other character information, data signals, etc. obtained by the CADA encoder (28) to produce a multiplexed signal S. Let it be A.

Note that when this transmission device starts up (when the power is turned on),
Audio and video channel allocation information (total number of channels, correspondence between audio channels and video signal channels, etc.) is transmitted by the signal from the master controller (19).
is transmitted as a data signal in the multiplex signal SCA.

This multiplexed signal SCA is then supplied to a modulator/demodulator (29), which modulates the signal into a predetermined two-channel band signal and outputs the signal. In addition, the signals from the first to third VTRs (11) to (13), override VTR (14), television station (16), and video camera (17) supplied to the system controller (10) are The video signals are each supplied to a modulator/demodulator (29), and modulated into signals in the band of each channel, that is, signals of six channels, and output.

The modulation frequency of this modulator/demodulator (29) is 60 or more television broadcast channels, and in order to prevent cross-modulation, the modulation frequency is sequentially modulated every two channels.

Then, this modem (29) outputs a two-channel multiplexed signal S. The video signals of A and 6 channels are frequency-multiplexed as a transmission signal 5IIF, and a leaky cable (leaky cable) (2
) at one end. The other end of this leaky cable (2) is connected to a terminating resistor (2a) for termination.

This leaky cable (2) is, for example, a coaxial cable with a spiral cutout around it to increase the amount of signal leakage.・Also, the terminal device f (6a
), (6b) ... to leaky cable (2
) is demodulated by the modulator/demodulator (29) of the central control unit (1), then supplied to the CDA encoder (28), and from this CADA encoder (28) to the system controller (10). Master controller (
19) with data based on transmission signals from the terminal devices (6a), (6b), . . .

G. Description of Terminal Device Next, the configuration of the terminal side will be described. The above-mentioned leaky cable (2) is stretched throughout the cabin of the aircraft, as shown in Figure 2, and each passenger seat has, for example, one
Seats for three people (9a) in a set of seating units (9), (
9b) and (9C) are provided, and these seat units (9) are arranged in a predetermined state inside the aircraft as will be described later. And seats for these three people (9a), (9b)
.

To explain the seat unit (9) provided with (9C), each seat unit (9) has an antenna (4a) for capturing the transmission signal leaking from the key cable (2), ( 4b), (4c)...
... are provided, and each antenna (4a), (4b),
(4c) The signal captured by the distributor (5a),
(5b), (5c), etc., and the signals are distributed into three by the respective distributors (5a), (5b), (5C) ・=-, and the three divided signals are sent to the respective seat units (9). ) and each seat (9a), (9b).

(9C) Terminal devices (6a) and (6b) provided for each
, (6c) ...=.

This terminal bag! (6a), (6b), (6c) =
... is each passenger seat (9a), (
Although the details of only one terminal device (6a) are shown in FIG. 1, the other terminal devices (6b), (6c), etc. have the same configuration. It is. This terminal device (6a) supplies the transmission signal 5IIF distributed by the distributor (5a) to the TV china (61) and CADA -F-, -S (62), and TVf=
-Na (61) selects a predetermined channel to which a video signal is transmitted from among the multiple channel signals sent from the central control device (1) to the leaky cable (2) based on the channel selection information described later. It demodulates and supplies the demodulated video signal to a monitor receiver (63) to receive the video signal.

In addition, the CADA chines (62) has a central control unit (1
) to the leaky cable (2), demodulates the 2-channel signal in which the multiplexed signal ScA, which is a multiplexed audio signal and data, is transmitted;
The demodulated signal is supplied to the C^DA decoder (64).

Then, this CAD decoder (64) extracts desired data (or audio signal) from the multiplexed signal SCA in response to the operation of an operation key (67) of a terminal device (6a), which will be described later, and converts the extracted data into It is supplied to a personal computer (65) or a terminal side controller (66).

This personal computer (65) has a memo IJ (
65a) is the connection. Then, press the operation key (67
) is connected to the terminal side controller (66), and operation commands from the operation keys (67) are supplied to the controller (66). Further, headphones (68) and a joystick (69) can be connected to this terminal side controller (66) via terminals (66a) and (66b), respectively.

Furthermore, the terminal devices (6a), (6b), (6c) of this example
) ... can transmit data to the central control device (1) side. That is, each terminal device (6a).

(6b), (6c) ... The data obtained by the personal computer (65) is transferred to the CADA decoder (64).
) and from this CADA decoder (64) transmitter t4 (7) installed in each seat unit (9).
This data is supplied to a), (7b), (7c), and so on. These respective transmitters (7a), (7b).

(7C) ... is the ID where seat number data is stored
unit) (8a>, (8b), (8c)...
are connected, and the terminal devices (6a), (6b), (
After adding this seat number data to the data supplied from 6c)..., it is modulated into a signal of a predetermined band, and the demodulated signal is sent to the distributors (5a), (5b), (5c)...
Antenna (4a), (4b), (4c) via
Supply to... By doing this, the antenna (
4a), (4b).

The modulated signal is transmitted from (4C) to the central i-distribution device (1) via the leaky cable (2), and demodulated by the modem (29) of the central control device (1).

In addition, each terminal device (6a), (6b), (6c
)...'s personal computer (65), the respective transmitters (7a), (7b), (7
c) ...- is ID unit/t (8a), (8b
), (8c)... so that the seat number data can be sent to the personal computer (65), and the personal computer (65) always memorizes this data! J (65a), and the corresponding seat number (seat number data) is stored in each terminal bag U (6a), (6b), (6c) = =.

That is, the respective terminal devices (6a), (6b), (6c
)..., be sure to turn on each terminal device (6
a), (6b).

(6C) ... from the personal computer (65) to the transmitter (7a) via the CADA decoder (64).
, (7b), (7c), . . . to supply a request signal for seat number data. For example, when the terminal device (6a) is powered on and a request signal is supplied to the transmitter (7a),
This transmitter (7a) reads out the seat number data stored in the ID unit (8a).

Also, when the power is turned on, each terminal device (6a),
(6b), (6c)..., the multiplexed signal S supplied from the central controller (1) as described above. A CADA decoder (64) demodulates the information as a data signal in the channel ratio and sends it to the personal computer (65).
) l;: It is like supplying. Note that this channel assignment information is supplied to the personal computer (65)! J (65a) stores information at this channel ratio. And each terminal device (6a),
(6b), (6c)..., when selecting the TV channel and audio channel, the personal convenience store 9 (65) selects the video signal on the TV tuner (61) based on the information in this channel ratio. and C
Controls the selection of audio signals in the ADA decoder (64).

Next, Fig. 3 shows an example of the configuration of the panel surface of the terminal device (6a).
) are placed on the left side, and the operation keys (67) are on the right side.
is placed. This operation key (67) is a channel indicator (67a) and a channel up key (6?
b) and the channel down key (67c).
Game selection key (67d) and TV selection key (67d)
7e), menu selection key (67f), enter key (67g), and audio selection key (67h).
), a volume up key (67i), and a volume down key (67J).

In this case, the channel display (67a) consists of a 2-digit, 7-segment display, and can display numbers or some alphabets in 7 segments.

Then, for example, by pressing the TV selection key (67e) and then pressing the channel up key (67b) or channel down key (67C), the channel of the video signal to be received by the monitor receiver (63) can be changed to the desired one. Can be switched sequentially. However, this channel up key (67b) or down key (67
c), the override VTR (1
The channel from which the video signal from 4) can be obtained cannot be selected.

Similarly, the game selection key (67d), menu selection key (67f), or audio selection key (
67h), then press the channel up key (67b)
Alternatively, by pressing the channel down key (67c), the user can select a video game to be played on the monitor receiver (63), select a menu, or select an audio signal to listen to through headphones (68). Furthermore, when an override control signal (to be described later) is supplied, the monitor receiver (63) is forced to receive the video signal from the override VTR (14) regardless of the operation of these keys.

G3 Explanation of operations on terminal devices Next, each terminal device (6a), (6b), (6c
)..., for example, when a TV channel switching command is supplied from the operation key (67) to the terminal controller (66) through the above operation, the terminal controller (66) )
The key selection information is supplied to the TV tuner (61) via the personal computer (65), and the TV tuner (61)
In step 1), the channel of the video signal is switched to the specified channel, and the channel to be received by the monitor receiver (63) is switched, and the channel selection information is also supplied to the CADA decoder (64). ) to multiplex the audio signal of this channel into a signal S. A, the extracted audio signal is supplied to a terminal controller (66), and the audio is reproduced through headphones (68) connected to the terminal controller (66).

In addition, when selecting an audio channel, the TV channel switching command can be performed using the operation key (
67) to the terminal side controller (66), the terminal side controller (66) supplies the channel selection information to the CA[lA decoder (64), and the multiplexed signal supplied from the central control device (1) side. The audio signal in ScA is extracted based on this channel selection information and the terminal side controller (6
6) and reproduced through headphones (68).

When playing a video game, the user first presses the game selection key (67d). By pressing this key (67d), the terminal side controller (66) instructs the CADA decoder (64) to extract game type information from the multiplexed signal SCA, and supplies the extracted data to the personal computer (65). . Based on this type information, the TV game ROM cartridge (23a) installed in the central controller (1) is sent from the personal computer (65) to the monitor receiver (63) via the TV tuner (61). ~(23g) A display signal indicating the type of video game is supplied to display the type of video game on the monitor receiver (63). At this time, seven types of ROM cartridges (23a) to (23g) are installed in the central controller (1).
) is attached, the numbers No. 1 to 1io7 are displayed, and the selected number is indicated by the position of the cursor.

Passengers seated at each seat then press the channel up key (67) while looking at the displayed game type display.
b) Or by pressing the channel down key (67c), the personal computer (
65) receives this operation command, and the position of the cursor changes. Then, by pressing the enter key (67g) when the displayed cursor position reaches a desired number, the game with this number is selected. That is, enter key (67g
) is pressed, the personal computer (65) outputs the data of the selected menu to the CADA decoder (64) based on the operation command from the operation key (67), and the data of the selected game number is Transmitter (7
From a), the seat number data is added and transmitted to the central controller (1).

Then, in the central control unit (1), this data is
^Encoder (28) and system controller (10)
) to the master controller (19).

When this video game program is selected, under the control of the master controller (19), this program is transferred from the ROM cartridge (for example, ROM cartridge (23a)) in which the designated video game program is stored to the data transmitter (27). Read and terminal device (6a)
After adding seat number data that specifies the seat corresponding to the
) and is multiplexed with other data from this CADA encoder (28) to form a multiplex signal SCA. After modulating this multiplex signal SCa with a modulator/demodulator (29), it is sent to a leaky cable (2) and downloaded as a download. It is transmitted to the terminal device (6a) side.

At this time, information indicating the length of the game program, ie, the data length, is first transmitted from the central control unit (1).

Transmission of this game program requires a transmission time of 10 seconds to several minutes depending on the length of the program.

Then, on the terminal device (6a) side, based on the seat number data, a CADA decoder (64) extracts a television game program from the transmitted multiplexed signal SCA, supplies it to the personal computer (65), and supplies it to the personal computer (65). This program is stored in the memory (65a) connected to the computer 65) over a transmission time (10 seconds to several minutes).

When the transmission of this program is complete, you will receive a memo for one video game program! Since the storage in J (65a) is completed, execution of the video game is started. In this state, the game is operated by supplying operation commands to the personal computer (65) in accordance with the operation of the joystick (69) connected to the terminal side controller (66).

In addition, when selecting a meal menu, by pressing the menu selection key (67d), the terminal side controller (66) instructs the CAD^ decoder (64) to extract meal menu data from the multiplexed signal SCA. The data is supplied to the personal computer (65). Based on this meal menu data, the personal computer (65) then sends the TV tuner (61) to the TV tuner (61).
A meal menu display signal is supplied to the monitor receiver (63) through the monitor receiver (63), and the meal menu is displayed in characters on the monitor receiver (63). At this time, a plurality of types of meal menus prepared as in-flight meals are displayed, and the selected menu is indicated by the position of the cursor. Then, while looking at the displayed meal menu, the passenger presses the channel up key (67b) or channel down key (67c), and then presses the operation key (67).
This operation command is received from the personal computer (65), and the position of the cursor changes. Then, when the displayed cursor position reaches the desired menu, this menu is selected by pressing the enter key (67g). That is, when the enter key (67g>) is pressed, the personal computer (65) outputs the data of the selected menu to the CAD decoder (64) based on the operation command from the operation key (67), and this selection is The data of the selected menu is sent from the transmitter (7a) to the central control unit (1) with seat number data added.Then, in the central control unit [1], this data is sent to the CA
DA encoder (28) and system controller (2
1) to the microcomputer (15), and the microcomputer (15) aggregates this data. Based on these aggregated results, the flight crew can decide which meals to hand out to each passenger.

G4 Explanation at the time of override Next, we will explain the case where each terminal device (6a), (6b), (6c) is forced to receive a ride based on instructions from the central controller (1). do.

When receiving this override, the flight crew operates the keyboard (20) of the central control unit (1) to specify the terminal device to be overridden, and then turns on the override VTR (14). Instructs to put it into play mode. After giving this instruction using the keyboard (20), the master controller (19) supplies an override control signal to the CADA encoder (28) via the system controller (10), and outputs the multiplexed signal S. A
As data inside, each terminal device (6a
).

(6b), (6c), etc.

In this case, an address signal indicating the address of the terminal device designated by the keyboard (20) is added as the override control signal. For example, a terminal device (6a),
If you want to convey something only to the passengers seated in the three seats corresponding to (6b) and (6C), based on the operation of the keyboard (20), this terminal device (6a), (
6b) and (6C) are added, and the override control signal to which this address signal is added is sent to all terminal devices (6a), (6b), (6c)...
・Supply to. At this time, the override V T is given a command from the master controller (19).
R (14) to the regeneration state, and other V T
The reproduction states of R(11) to (13) are continued as they are. In addition, the override VTR (14) has the following:
A tape cassette containing a video recording of the message you wish to transmit is loaded in advance.

This override control signal is sent to each terminal device (6a).

(6b), (6c) ..., the respective terminal devices (6a), (6b), (6c) =-
The CADA decoder (64) extracts an override control signal from the multiplexed signal SCA, and supplies the extracted override control signal to the personal computer (65). And each personal computer (6
In step 5), it is determined whether the address signal included in this override control signal indicates the address of the own seat. For example, when adding the address signal mentioned above,
It is determined that the terminal devices (6a), (6b), and (6c) indicate the address of one's own seat. When this self-address determination is performed, the personal computer (65)
is TV Chinina (VT for 61H Nioperlite)
An instruction is given to switch to a channel from which the video signal from R (14) can be obtained, and this override video is received on the monitor receiver (63). In addition, a command signal is supplied from the personal computer (65) to the CAD decoder (64), and the terminal devices (6a), (6b) and (6
The audio reproduced from the headphones connected to C) is also switched to the audio channel corresponding to this override video channel.

While override reception is being performed only by these terminal devices (6a), (6b), and (6C), the playback of other VTRs (11) to (13) continues. Since the remaining terminal devices (6d) and (6e
), (6f)..., viewing continues on the normal channel (channel other than the override channel).

Next, by operating the keyboard (20) of the central control unit (1), all the terminal devices (6a), (6b), (6
c) When instructing to perform override reception in ..., an address signal indicating that the instruction is for all seats is added as an address signal to the override control signal output from the master controller (19). Add. At this time, the master controller (19) commands the auto-ride V
While setting the TR (14) to the playback state, the other V T
R(11) to R(13) are placed in a reproduction pause state until this override reception is completed.

By doing this, this override control signal is transmitted to each terminal device (6a), (6b), (6c)...
When supplied to all terminal devices (6a), (6b)
, (6C)...'s personal computer (65
), it is determined that the address signal included in the override control signal extracted from the multiplex signal scA indicates its own address, and all terminal devices (6a), (6b),
<6c)...Lever override reception is performed.

Then, when this override reception is finished, each V T that was in the playback pause state when override reception started
Since this pause of R(11) to (13) is released and the playback state is entered, each terminal device (6a), (6tl),
In (6C)..., it is possible to continue viewing the program such as a movie that was being viewed immediately before the override reception was performed.

In this way, according to the transmission device of this example, multiple terminal devices (
tlia), (6b), (6c), etc. can be specified for override reception, which is convenient if, for example, there is a message that you want to send to only some passengers. . If only some of these terminal devices perform override reception, other terminal devices that do not receive override will continue to watch other video channels, so other terminal devices that do not receive override will continue to watch other video channels. Unable to prevent viewing on terminal devices,
Good service can be provided to each passenger.

In addition, all terminal devices (6a), (6b), (6c
) When the override reception is performed simultaneously, the playback of the first to third VTRs (11) to (13) is temporarily paused, so after the override reception is completed, It is possible to continue watching the continuation of the program that was being watched immediately before receiving the override, and it is possible to watch movies and other programs without any interruptions.This also allows for good service to each passenger even in the event of a simultaneous override. I can provide it.

Note that in the above embodiment, V
Although the video signal and audio signal reproduced from the TR (14) are received, the video channel may not be changed and only the audio from the microphone (18) etc. may be received by override. Further, the text information created by the master controller (19) may be overridden to be superimposed on the video being received by each terminal device.

Further, in the above embodiment, each terminal device (6a).

(6b)... are attached to the back of the seat, but the armrests of the seat may also be attached to the back of the seat. In this case, only the operation keys (67) are mounted on the armrest and the monitor receiver (67) is mounted on the armrest.
3) on the back of the seat or a monitor receiver (
63) may be placed inside the armrest. Also,
In the above-mentioned embodiments, the explanation has been given using a passenger plane as an example, but the present invention can also be applied to vehicles such as trains and buses, or to theaters and stadiums, as long as the service is provided to a large number of customers.

Furthermore, it goes without saying that the present invention is not limited to the above-described embodiments, and can take various other configurations without departing from the gist of the present invention.

Effects of the Invention According to the information transmission device of the present invention, each terminal device (6a) can be accessed by simply performing a predetermined operation on the central control device (1) side.

(6b), (6c) . . . There is an advantage that override reception can be precisely controlled for each time, and good service can be provided to each passenger.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing an embodiment of the information transmission device of the present invention, FIG. 2 is a perspective view showing the arrangement of the embodiment, and FIG. 3 is a front view showing the terminal device of the embodiment. . (1) is the central control unit, (2) is the leaky cable, (
4a), (4b), (4c) are antennas, (5a)
, (5b), (5c) are distributors, (6a), (6
b), (6c) ・--- is a terminal device, (7a),
(7b). (7C) is a transmitter, (8a), (8b), (8c)
is the ID unit, (10) is the system controller, (
11) is the first VTR, (12) is the second VTR, (1
3) is the third VTR. (14) is an override VTR, (15) is a still image transmitter, (16) is a TV china, (17) is a video camera, (18) is a microphone, (19) is a master controller, (20) is a keyboard , (21) is a monitor receiver, (22) is a printer, (23a) to (23g)
is a ROM cartridge, (24) is a floppy disk drive, (25) and (26) are audio playback devices, (
28) is a CAOA encoder, <29) is a modem, (
61) is a TV tuner, (62) is a CADA tuner,
(63) is a monitor receiver, (64) is a C to A decoder, (65) is a personal computer, (65a)
is a memory, (66) is a terminal side controller, (67) is an operation key, and (69) is a joystick.

Claims (1)

[Claims] In an information transmission device that transmits video signals or audio signals of multiple channels from a central control device to a plurality of terminal devices, by transmitting a predetermined control signal including an address signal from the central control device, , the video signal channel or the audio signal channel received by the terminal device specified by this address signal is forcibly switched to a specific channel, and this forced channel switching by the central control device is controlled by the plurality of channels. When all of the terminal devices are designated by the address signal, the sender of the video signal or audio signal other than the specific channel to be received is put into a pause or stop state, and the central control device performs this forced channel switching. When a part of the plurality of terminal devices is designated by the address signal to perform this, a transmitter of a video signal or an audio signal other than the specific channel to be received is put into a reproduction state. information transmission equipment.