JP2745609B2 - Information transmission equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in the following order.

A Industrial Fields B Overview of the Invention C Prior Art D Problems to be Solved by the Invention E Means for Solving the Problems F Function G Example G ₁ Description of Central Controller G ₂ Description of Terminal Device G ₃ Description of operation at the time of address setting H Effect of the invention A Industrial application field The present invention is to transmit a video signal or the like from a central control device to a terminal device provided for each passenger seat such as an aircraft, a train, and a bus. The present invention relates to an information transmission device suitable for use in a computer.

B SUMMARY OF THE INVENTION The present invention relates to an information transmission device for transmitting information from a central control device to a terminal device provided for each passenger seat such as an aircraft, a train, a bus, and the like. If information can be transmitted from the central controller using the zone address only to terminals within the group, a command signal is transmitted from the central controller to the terminal in a specific zone, and only the terminals in this group are zone addresses. In this state, a signal can be fetched, the zone address signal is transmitted, and the terminal device fetches the zone address signal, so that the zone address can be automatically set with a simple configuration.

C. Prior Art For example, Japanese Patent Application Laid-Open No. Sho 62-168794 discloses that a video display is individually provided on a passenger seat of a vehicle such as an aircraft. That is, a video display as a terminal device is separately provided in the passenger seat, and a plurality of video signals are transmitted to the video displays from the central control unit in parallel, and each video display selects one of the signals. Is displayed.

D Problems to be Solved by the Invention By the way, the video display for each seat includes:
It is proposed that individual addresses corresponding to seat numbers are assigned, and that the central control device side designates an address and selectively transmits only necessary signals to a desired video display (terminal device). Have been.

In this case, each video display corresponding to each seat is provided with an address signal generator in which a different address is set, and addressing is performed based on an address signal obtained from this address signal generator. 2. Description of the Related Art In recent years, aircraft have been increasing in size. For example, setting an address signal generator of a video display corresponding to each seat of an aircraft having 500 or more seats has a disadvantage that it is very troublesome.

In order to solve this inconvenience, the present applicant has previously proposed various types of information transmission apparatuses in which addresses are automatically set. For example, an address signal is sequentially supplied from the central control device to each terminal device in a predetermined method, and an address setting completion signal is returned from the addressed terminal device to the central control device, and the set address is centrally controlled. This is to check with the device.

According to this address setting method, addressing is automatically performed, which is convenient. However, in order to confirm the set address, an uplink line from each terminal device to the central control device is required. There is an inconvenience that cannot be applied to a relatively simple system connected only by a so-called down line for transmitting a video signal or the like to the device.

In view of the above, an object of the present invention is to provide an information transmission apparatus of this kind in which an address is automatically set even when there is no uplink.

E Means for Solving the Problem The information transmission apparatus of the present invention is, for example, as shown in FIG.
A central control device (1) for transmitting information, and a plurality of zoned terminal devices (6a) and (6b) connected to receive information transmitted from the central control device (1);
And address setting means provided for each zone constituted by the plurality of terminal devices so as to perform address setting control of terminal devices in the zone and to receive information from the central control device (1). 7a) and (7b)}, when setting a zone address for a terminal device in a specific zone, the central control device (1) sends an address in the first state to the address setting means of the specific zone. In addition to sending the setting signal, the central control unit (1) sends the address setting signal in the second state to the address setting means other than the specific zone, and then the address data set from the central control unit (1) is transmitted. In the address setting means which has transmitted the address setting signal in the first state, the terminal device in the own zone is set in a state where the zone address can be taken in, and the zone address transmitted at this time is set to Perform the control to be imported by the terminal device,
The address setting means to which the address setting signal in the second state is transmitted sets the terminal devices in the own zone to a state in which the zone address cannot be taken.

According to the present invention, an address setting signal is supplied from the central control device (1) to the address setting means (7a), (7b) #, and the address setting signal is supplied to each terminal device (6a), (6b) #. Just by supplying the zone address signal, the address is set for each zone,
Central control unit (1) from each terminal unit (6a), (6b) ‥‥
The zone address is automatically set without transmitting a signal to the side, and the present invention can be applied to a transmission device without an uplink.

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

This example is applied to a transmission device for transmitting a video signal, an audio signal, and the like in an aircraft.

Description in G ₁ central control unit will be described first central controller. In FIG.
(1) shows a central control device provided in a crew room or the like,
This central control device (1) includes four video tape recorders (hereinafter, referred to as VTRs). That is, first, second and third VTRs (11), (12) and (13) in which tape cassettes mainly recording entertainment programs such as movies are loaded;
An override VTR (14) into which a tape cassette in which a life vest is worn is recorded. Also,
Still image recording media (CD such as maps and airfield guide maps)
ROM) and a still image transmitter (15), and a TV tuner (16) that receives normal television broadcasts during waiting time at an airport or receives television broadcasts from broadcast satellites during flight And a video camera (17) installed in the cockpit to capture the state of takeoff and landing, a microphone (18) for guiding passengers, and control of each device such as playback control of each VTR (11) to (14) , Master controller for in-flight management that creates character information to be supplied to each terminal device (19)
And a keyboard (20) connected to the master controller (19) and instructing various operations to be described later; and a control state connected to the master controller (19), the control state of the master controller (19), and the transmission image of each VTR, etc. A monitor receiver (21) for displaying. Equipment (11)-(2
1) is connected to the system controller (10) of the central control unit (1), and each VTR is transmitted from the master controller (19) via the system controller (10) in response to an operation command from the keyboard (20). (11)-(14), CD
A control signal is supplied to the ROM drive device (15), the television tuner (16) and the video camera (17), and the VTRs (11) to (14) supply reproduced video signals and audio signals by the control signals. , A CD ROM drive (15) supplies a video signal of a still image, a TV tuner (16) supplies a TV broadcast signal (video signal and audio signal), and a video camera (17) supplies a captured video. A signal is provided. Further, time data, character information, and the like are supplied from the master controller (19) to the system controller (10).

Further, seven ROM cartridges can be mounted on the central control device (1), and in this case, seven game ROM cartridges (23a) and (23b) each storing a different video game program. ‥ Attach (23g). The computer program data read from these ROM cartridges (23a) to (23g) is supplied to a data transmitter (27) described later.

Reference numeral (24) denotes a floppy disk drive connected to the master controller (19). Data such as a meal menu stored in a floppy disk mounted on the floppy disk drive (24) is transferred to the master controller (19). ) Via the system controller (10)
And new data can be stored or the stored data can be corrected by operating the keyboard (20). At the time of the storage operation or the correction operation, data can be confirmed by the monitor receiver (21).

Also, (25) and (26) show audio reproducers each including three compact disk players and three tape reproducers (total of six), and these audio reproducers (25) and (2)
6) simultaneously reproduces six sets of stereo audio signals (i.e., 12-channel audio signals) from six units by supplying a control signal from the system controller (10), and outputs the six sets of reproduced stereo audio signals to CADA described later. Supply to the encoder (28).

Reference numeral (27) denotes a data transmitter, and the RO is supplied by a control signal from the system controller (10).
Data such as a video game program is read from the M cartridges (23a) to (23g), the read data is subjected to a predetermined process, and then supplied to the CADA encoder (28).

(28) is a CADA encoder used in a conventionally known cable digital audio / data transmission system (CADA system). CADA system is, for example, time-division multiplexing multiple digital audio, CATV
This is a system that transmits using the band (6 MHz) of one available TV channel, and can transmit music and the like very efficiently without deteriorating sound quality. The CADA encoder (28) includes an A / D converter and a shift register, converts a plurality of audio signals into digital signals by the A / D converter, and inputs the digital signals to predetermined positions of the shift register in parallel. At the same time, time-division multiplexing is performed by serially outputting high-speed signals from the shift register. Note that not only digital audio but also various transmission data such as control data and computer program data are multiplexed together.

Then, the above-mentioned audio signal and character information such as a meal menu and data such as a video game program data supplied to the system controller (10) are supplied to the CADA encoder (28), and the audio signal and the data are timed. The signal is multiplexed by division and output as a multiplexed signal _SCA .

In this case, various data supplied from the above-mentioned master controller (19) are transmitted using predetermined data bits in the multiplex signal _SCA . The signal format of the multiplex signal will be described below. This signal format is an improvement of the signal format proposed in Japanese Patent Application Nos. 58-210356 and 59-170925.

That is, this multiplex signal is, as shown in FIG.
A serial binary signal St composed of a number of superframes, one superframe of which is 256 frames F1
F256, one frame of which is composed of 168 bits and has a cycle of 1 as shown in FIG. 4B.
/ 32kHz. Each frame has, in order, an 8-bit motivation code SYNC, 4-bit service bits SB, 32-bit × 4 data packets PCTA to PCTD, and 7-bit × 4 error correction bits ECC. .

In this case, as shown in FIG. 4A, the synchronization key SYNC is a superframe sync SS in the first frame F1 of the superframe, and the following 255 frames F2 to F25
In FIG. 6, the frame sync is FS, and the bit pattern is different between the superframe sync SS and the frame sync SS.

As will be described later in detail, the service bit SB has data of commands, seat numbers, etc., with 77 frames as one unit.

Furthermore, each of the data packets PCTA to PCTD is 32
It is composed of bits and independently constitutes four packets PCTA to PCTD. And
The packet PCTA~PCTD, as shown in FIG. 4 C, respectively divided into four channels M ₁ ~M ₄ 8 bits, the respective channels M ₁ ~M ₄ is an audio signal (sound signal) It is a PCM signal sampled at a frequency of 32 kHz.

Therefore, in one frame, four packets PCTA
~ PCTD and each packet has 4 channels
Since it has M _{1 to} M ₄ , one signal St makes 16
The audio signals of the channels can be transmitted simultaneously in a time-division manner.

Further, data such as a video game program from the ROM cartridges (23a) to (23g) is a bit-sequential time-division signal, and this signal is used as it is as one of the 16-channel signals. When the data has been sent out to the last bit, it is sent out from the first bit again.

Further, the error correction code ECC is used to correct errors for each of the packets PCTA to PCTD.

Then, since the signal St has the above format, the transmission bit rate is 168 bits × 32 kHz 5.4 Mbps, and 1/2 of the transmission bit rate is the Nyquist frequency. It can be transmitted.

Therefore, as described above, the CADA encoder (28) can time-division multiplex each of the 16-channel audio signals, and the time-division multiplex signals together with other video signals,
Frequency multiplexing can be performed.

The service bit SB is used, for example, in the format shown in FIG. That is, the service bits SB are 4 bits per frame and the 4-bit and sequentially bit B ₁ .about.B _4. Then, as shown schematically in FIG. 5A, a set of 77 consecutive frames and the 77 frames are arranged vertically in frame units, the service bits have a size of 77 bits vertically × 4 bits horizontally. Become.

Therefore, as shown in FIG. 5B, if the service bit SB is taken out in the vertical direction and the 77 bits are regarded as one channel, the first channel CHNA is formed by 77 bits B ₁ , and similarly, the bit B ₂ second to fourth channel CHNB~CHND is formed by the 77 amino .about.B _4.

Then, as shown in FIG. 5B, channels CHNA-CH
Each of the NDs consists of 7 words WRDA ~
WRDG, and as shown in FIG. 5C, in each word, the first bit is a start bit ST of “0” level.
RT is set, the next 8 bits are set as data bits DTBT, the next 1 bit is set as parity bit PRTY, and the last 1 bit is set as stop bit STOP of “0” level.

And the data bits DTBT, but the channel CHNA
In each of ~ CHND, there is one data bit DTBT per word and seven words per 77 frames, so there will be seven data bits DTBT per 77 frames (7 bytes), and thus, as a whole The data bit DTBT has 8 bytes × 4 channels.

Then, among the data bits DTBT, the data bits DTBT of the second channel CHNB are, as shown in FIG.
The first byte is a predetermined bit pattern (hexadecimal value "AA")
And the second byte is the command CMD,
Used to identify at most 256 types of instructions. further,
The third and fourth bytes are the seat number (end device address)
, The fifth byte and the sixth byte are status information STTS indicating data or parameters accompanying the command CMD, and the last byte is an error check code ECC.

Therefore, the data bits DTBT of this channel CHNB
Accordingly, it is possible to specify a terminal device to be transmitted and to control a predetermined operation.

In this case, in this example, the address setting designation of each of the terminal devices (6a) and (6b) described below can be transmitted by the data bit DTBT. That is, at the time of this address setting, the command CMD of the data bit DTBT is set as an address setting command, and the address ADRS is set as the address number set. In this example, a common number is set for each zone in the guest room. That is, a first class zone, a business class zone,
The zone is divided into three zones, the economy class zone, and the same address numbers are set to the terminal devices (6a) and (6b)} in each zone so that zone addresses can be assigned.

Then, the multiplexed signal _SCA is supplied to a modulator (29),
The signal is modulated into a signal of a band of a predetermined channel and output. The video signals from the first to third VTRs (11) to (13), the television tuner (16), and the video camera (17) supplied to the system controller (10) are respectively modulated by modulators (29).
, And modulates the signals into bands of different channels and outputs the signals. The video signal from the override VTR (14) is modulated into a signal of the same channel as the video signal from the first VTR (11). Controller (1
Under the control of 9), the first VTR (11) is brought into a pause state.

Then, the multiplexed signal S _CA and the video signal of each different channel for outputting the modulator (29) is, as the transmission signal S _MF that is frequency-multiplexed, to one end of the coaxial cable that is spread around each zone (2) Supply.

In this example, a binary signal for address setting is sent from the master controller (19) to each of the terminal devices (6a) and (6b)} in each zone described later. A signal is supplied to a modulator (29) via a system controller (10), and the binary signal is supplied from the modulator (29) to one end of a signal line extending in each zone in parallel with the coaxial cable (2). Supply.

Description of G ₂ terminal Next, the configuration of the terminal side. As shown in FIGS. 1 and 2, the coaxial cables (2) drawn out from the central control unit (2) for each of the zones A, B, and C are separated into separate amplifiers (31a), (31b), (31). 31c) through each zone A, B, C
Reach below the floor of the room. And within each zone A, B, C,
The distributor (32) distributes the coaxial cable (2) to a plurality of cables according to the arrangement of the seats. In this case, the signal line for transmitting the address setting binary signal is also connected to the amplifier (31).
a), (31b) and (31c) are connected to the distributor (32) to perform amplification and distribution. Then, the splitters (33a), (33b), and (33c) are connected to the distributed coaxial cables (2).
‥‥ are connected in series, and each branching device (33a), (33b), (33
c) From (1), terminal devices (6a), (6b), (6c) for each seat
Supply the transmission signal to ‥‥.

In this case, for each passenger, for example, one set of seat units (9) is provided with seats (9a), (9b) and (9c) for three persons, and these seat units (9) will be described later. It is arranged in a predetermined state in the aircraft. A terminal device (6a), (6b), (6c)} is provided for each seat (9a), (9b), (9c) of each seat unit (9). And 1
Three terminal devices (for example, (6a), (6b), (6c)) provided in the set of seat units (9) receive transmission signals branched from the same branching device (for example, (33a)). .

These terminal devices (6a), (6b), (6c) ‥‥ are installed on the back of each passenger seat (9a), (9b), (9c) as shown in FIG. 2, and in FIG. Details are shown for only one terminal device (6a), but other terminal devices (6b), (6c)
‥‥ has the same configuration. The terminal device (6a), the branch unit and TV tuner transmission signal S _MF that is branched in (33a) (61)
The signal is supplied to the CADA tuner (62), and the TV tuner (61) determines a predetermined channel for transmitting a video signal among signals of a plurality of channels transmitted from the central control unit (1) to the leaky cable (2) as described below. The demodulated video signal is selected and demodulated based on the selected channel information, and the demodulated video signal is supplied to the monitor receiver (63) to receive the video signal. Also, according to a signal supplied from the personal computer (65) to the TV tuner (61), figures and characters such as maps are displayed on the monitor receiver (63).
Will be displayed.

Further, CADA tuner (62), the central control unit (1) of the plurality of channels of signals sent to a coaxial cable (2) from the multiplexed signal S _CA which multiplexes the audio signal and data
Demodulates the signal of the channel to be transmitted and converts the demodulated signal to CA
Supply to DA decoder (64). When the demodulated signal includes tuning information, the tuning information is transmitted to a TV tuner (6.
1) to supply. And this CADA decoder (64)
In accordance with the operation of the operation keys described below the terminal device (6a) (67), takes out the desired data (or audio signal) from the multiplexed signal S _CA, the retrieved personal computer (65) data or terminal controller ( 66).
This personal computer (65) has a memory (65
a) is connected. The operation key (67) is connected to the terminal-side controller (66), and an operation command from the operation key (67) is supplied to the controller (66). The terminal-side controller (66) has terminals (66
Headphones (68) and joysticks (69) can be connected via a) and (66b).

In addition, one ID unit (7a), (7b)} is installed for each set of seat units (9), and each ID unit (7b)
The ID units (7a) and (7b)} are connected in series by a signal line for transmitting a binary signal for address setting. The connection order at this time is the same as the connection order of the branching devices (33a), (33b), (33c)} by the coaxial cable (2), for example. Each of the ID units (7a) and (7b)} stores a zone address set by a method described later, and the corresponding terminal device (6a),
(6b), (6c) The stored zone address signal is supplied to the CADA decoder (64). For example, the ID unit (7a) supplies a zone address signal to the terminal devices (6a), (6b), and (6c). In addition, each ID unit (7a),
(7b) ‥‥ is the CADA decoder (6) of one of the connected terminal devices (for example, terminal device (6a), (6b), (6c) ‥‥).
Address setting signal from the 4) is transmitted using the data bits DTBT in multiplexed signal S _CA is are then as supplied.
In each of the ID units (7a) and (7b)}, the binary signal for address setting supplied from the central control unit (1) through the above-described signal line is a low-level signal "0". Sometimes, the zone address indicated by the address setting signal supplied from the CADA decoder (64) is stored. When the address setting binary signal is a high level signal "1", the address transmitted at this time is not stored even if the address setting signal is supplied from the CADA decoder (64).

Then, each terminal device (6a), (6b), (6c) ‥‥
The personal computer (65) has an ID unit (7
(a), (7b) The zone address data supplied from (7) is stored in the memory (65a).

Next, FIG. 3 shows a configuration example of the panel surface of the terminal device (6a).
3) is arranged on the left side, and an operation key (67) is arranged on the right side. The operation keys (67) include a channel indicator (67a), a channel up key (67b), a channel down key (67c), a game selection key (67d),
TV selection key (67e), enter key (67g), audio selection key (67h), volume up key (67i)
And volume down key (67j) and monitor on key (67k)
And In this case, the channel indicator (67a)
High-order display section (67a ₁₎ and low-order display section (67a ₂₎ and become greater, the display portion of each _{(67a 1), (67a 2} ) is capable of displaying alphabetic numeric or a part in 7 segments.

Then, for example, after pressing the TV selection key (67e),
By pressing the channel up key (67b) or the channel down key (67c), the channel of the video signal received by the monitor receiver (63) can be sequentially switched to a desired one. Similarly, select the game selection key (67
d) or press the audio selection key (67h), then press the channel up key (67b) or the channel down key (6
By pressing 7c), it is possible to select a video game to be executed on the monitor receiver (63) or an audio signal to be listened to the headphones (68).

Description of operation when G ₃ address setting Next, each terminal (6a), a description will be given of the operation for setting the (6b) Zone address ‥‥. This address setting is performed when a seat is arranged at the time of manufacturing the airplane or when the seat is replaced. And
When performing this address setting, first, it is performed based on address setting information stored in advance in the master controller (19) of the central control device (1). The address setting information includes zoning information of the cabin of the airplane (a distinction between the first class, the business class, and the economy class). In this example, the ID unit (7a) provided for each seat unit (9) Set the zone address in, (7b) ‥‥. In this case, for example, the economy class is zone A, the business class is zone B, and the first class is zone C. FIGS. 1 and 2 show details of the economy class in zone A.

For example, considering that a zone-address indicating the economy class is set in the ID units (7a) and (7b)} in the economy class guest room of the zone A, the central control unit (1) The master controller (19) issues a command to transmit a low-level signal “0” to the address-setting binary signal line of the zone A, and sends a high-level signal to the address-setting binary signal lines of the other zones B and C. Command to transmit signal "1". With this command, the system controller (10) sends the signal through the modulator (29)
A low-level signal "0" is transmitted from a predetermined signal line, and the low-level signal "0" is sent to the ID units (7a) and (7b) # in the zone A via the amplifier (31a) and the distributor (32). And a high-level signal “1” is similarly supplied to ID units (not shown) in the zones B and C. At this time, the master controller (19) supplies an economy class address setting command to the CADA encoder (28) via the system controller (10). By supplying this command, the CADA encoder (28) creates an economy class address setting signal using the data bit DTBT as shown in FIG. 5D, and sends it from the modulator (29) via the coaxial cable (2). Terminal devices in all zones (6a),
(6b) A multiplexed signal including the data bit DTBT is transmitted in (1). The data bit DTBT at this time is
Is an address setting instruction, and the address ADSR is a zone number of the economy class.

The multiplexed signal including the data bit DTBT is supplied to each terminal device (6a), (6b)}, and the CADA decoder (64) of each terminal device (6a), (6b)} receives this address. A predetermined terminal device (6a), (6d), (6g) configured to demodulate the data bit DTBT including the setting command and to supply an address signal to the ID unit (7a), (7b).
The address setting command demodulated by {} is supplied to the corresponding ID unit (7a), (7b)}. At this time, only the ID units (7a) and (7b)} in the zone A are supplied with the low-level signal "0" as the binary signal for address setting. ), (7b) ‥‥
Only the zone address indicated by the address setting command from the CADA decoder (64), that is, the zone address of the economy class. And the IDs in other zones B and C
Similarly, the unit is supplied with an address setting command from the CADA decoder (64). However, since a high-level signal "1" is supplied as a binary signal for address setting, this unit
The ID units in B and C do not store addresses.

The zone address of the economy class is stored in the ID unit (7a), (7b)} installed in the seat unit (9) in the zone A, and each terminal device of the seat unit (9) in the zone A is stored. The zone address of this economy class is taken into the personal computer (65) of (6a) and (6b).

Similarly, when storing the zone addresses in the ID units of the other zones B and C,
After setting only the binary signal for address setting supplied to the low level signal to "0", the CADA encoder (28) sends out a multiplex signal including zone address setting information of the corresponding class. Then, a business class zone address or a first class zone address is stored in the ID unit in the zone B or the zone C, and the personal computer of the terminal device (6a) or (6b) # connected to each ID unit. In (65), a business class zone address or a first class zone address is stored.

In this way, the address of the zone installed in each terminal device (6a), (6b) ‥‥ is automatically taken in. Therefore, during the flight of this airplane, the data bits of the signal transmitted from the CADA encoder (28) By specifying a zone address with the DTBT address ADRS, various services can be performed only for passengers (terminal devices) in the corresponding zone (class). For example, if the receivable information of a specific video channel is transmitted with the data bit DTBT added with a first-class zone address, only the terminal device in which the first-class zone address is stored can select the specific video channel. The service will be available for first class passengers only.

As described above, according to the information transmission apparatus of the present example, the address is automatically set for each zone only by transmitting a unidirectional information signal from the central control unit (1) to each of the terminal devices (6a) and (6b) ‥‥. The advantage is that the zone address is automatically set even for a relatively simple system that is set up in a non-uplink manner.

In the above embodiment, a passenger aircraft has been described as an example.
It can also be applied to vehicles such as trains and buses, or theaters and stadiums.

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

H Advantageous Effects of the Invention According to the information transmission apparatus of the present invention, even in a relatively simple system without an uplink from a terminal apparatus to a central control apparatus, an advantage that an address can be automatically set for each zone is provided. is there.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of an information transmission apparatus of the present invention, FIG. 2 is a perspective view showing an arrangement state of one embodiment, FIG. 3 is a front view showing a terminal device of one embodiment, FIG. FIG. 4 and FIG. 5 are diagrams each for explaining one embodiment. (1) Central control unit, (2) Coaxial cable, (6
a), (6b), (6c) ‥‥ are terminal devices, (7a), (7
b) and (7c) are ID units, (10) is a system controller, (11) is a first VTR, (12) is a second VTR, (13)
Is the third VTR, (14) is the override VTR, (15) is the still image transmitter, (16) is the TV tuner, (17) is the video camera, (18) is the microphone, (19) is the master controller, (20) is a keyboard, (21) is a monitor receiver,
(23a) to (23g) are ROM cartridges, (24) is a floppy disk drive, (25) and 26) are sound players, (2
8) is a CADA encoder, (29) is a modulator, (31a), (31)
b) and (31c) are amplifiers, (32) is a distributor, (33
a), (33b), (33c) ‥‥ are switchers, (61) is a TV tuner, (62) is a CADA tuner, (63) is a monitor receiver,
(64) is a CADA decoder, (65) is a personal computer, (65a) is a memory, (66) is a terminal controller,
(67) is an operation key, and (69) is a joystick.

Claims (1)

(57) [Claims] 1. A central control device for transmitting information, a plurality of terminal devices connected to receive the information transmitted from the central control device and divided into zones, and the plurality of terminal devices. Address setting means for setting the address of a terminal device in the zone, receiving information from the central control device, and providing a zone address to a terminal device in a specific zone. When setting, the central control unit sends an address setting signal in a first state from the central control unit to the address setting unit in the specific zone, and transmits the second state from the central control unit to the address setting unit other than the specific zone. After sending the address setting signal in the state, the central control unit sends address data to be set, and the address setting signal in the first state is transmitted. In the address setting means, the terminal devices in the own zone are brought into a zone address fetching state, and control is performed so that each zone receives the zone address transmitted at this time. An information transmission device in which the transmitted address setting means sets a terminal device in the own zone to a state in which the zone address cannot be taken.