JPS63219289A - Information transmission equipment - Google Patents

Abstract

PURPOSE:To simplify an equipment and to improve the operability of a user, by outputting a video signal or a voice signal selected at one selection operating part in plural terminal equipments from another device other than the plural terminals. CONSTITUTION:Plural video signals and voice signals, etc., are frequency- multiplexed on a transmission side, and are supplied to the terminal equipments 20F and 20B on a reception side via a reeky cable. Control data from the equipments 20F and 20B are supplied to the transmission side via the reeky cable. When a television channel is selected by the key operation of the selection operating part 25 in the equipment 20F arranged at the front of a seat where the user is seated, the user can observe an image on a display device 28 in the equipment 20F. Simultaneously, the user can listen to a corresponding voice by connecting a head phone 30 to the voice output terminal 29 of the equipment 20B where the user is seated. In such a way, it is possible to simplify wiring, and to evade inconvenience to prepare the phone 30 with a different lead wire, etc., at every change of a sead pitch.

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 B point of view (Fig. 1) F. Effect G. Example G. Explanation of the transmitting side G2 Explanation of the receiving side H Effect of the invention A Industrial field of application The present invention is applicable to a plurality of video displays and audio generators installed individually in or near the passenger seats of airplanes, train cars, lotuses, etc. The present invention relates to an information transmission device suitable for use in transmitting signals and audio signals in parallel.

B. Summary of the invention In the present invention, a plurality of video signals are transmitted from the transmitting side to the receiving side.

In an information transmission device that transmits audio signals in parallel, a plurality of video signals and audio signals are multiplexed and transmitted by a single signal transmission means, and a video signal or audio signal selected by - of a plurality of terminal devices is multiplexed and transmitted by a single signal transmission means. By outputting the information from other than the plurality of terminal devices, it is possible to simplify the device and improve usability for the user.

C. Prior Art For example, U.S. Pat. No. 4,584,603 shows the provision of individual video displays in passenger seats of vehicles such as aircraft. That is, video displays are individually provided in the passenger seats, a plurality of video signals are transmitted in parallel to these video displays, and each video display selects and displays one of the signals.

D. Problems to be Solved by the Invention In this conventional device, multiple video signals are transmitted to each video display using independent transmission lines, and many transmission lines are required. It is.

Therefore, there is a problem that the wiring becomes complicated and the device becomes complicated.

In view of these points, the present invention aims to simplify the device and improve usability for the user.

E Means for solving the problem (Fig. 1) The present invention has the following features:
On the transmission side, a plurality of video signal sources (18) to (lc), a plurality of audio signal sources (2a) to (2d), a computer (4), and a plurality of video signal sources (1a) to (1c). video signals from the computer, audio signals from the multiple audio signal sources (2a) to (2d), and control data DC from the computer (4).
I, and send this multiplexed signal to a bidirectional signal transmission means (
11).

(5a) to (5d), (61 and control data D from the receiving side supplied from the bidirectional signal transmission means (11)
A receiving unit (
8), and selects a predetermined video signal and audio signal from the multiplexed signal supplied from the bidirectional signal transmission means (11) on the receiving side.

(24), (26) and this selection part (23),
C24).

The video display section (28) and the audio generation section (30) to which the video signal and audio signal selected in (26) are supplied, and the two-way signal transmission means (11) transmit 4J (multiplexed signal) Separation unit that separates control data DCI from the side (
26), the unique address generation section (31), the selection operation section (25), and the control data D separated by the separation section (26).
Signals from the Cz and M selection operation section (25) and address data from the unique address generation section (31) are supplied to control the selection sections (23), (24), and (26), and also to control the selection section (23), (24), and (26). A plurality of terminal devices (20F ), (20B'), and a plurality of terminal devices (20F), (20
The video signal or audio signal selected by the selection operation section (25) of 8') is transmitted to a plurality of terminal devices (20F), (
20B).

F Function In the above-described configuration, a plurality of video signals, audio signals, etc. are multiplexed in the transmitting sections f3), (5a) to (5d), (61) and sent to the receiving side via the bidirectional signal transmission means (11). Since the signals are supplied to the terminal devices (20F>, (20B)), a predetermined video signal and audio signal can be selected by operating the selection operation section (25).

In this case, for example, the selection operation section (25) of the terminal device (20F) placed on the seat in front of the seat where the user is seated.
When a TV channel is selected using the
A video signal is selected in step 3). In addition, this selection operation section (
25) according to the operation of the microcomputer (260>
Control data DC2 (including address data ADF and selection data C11 from the unique address generation section (31)) is generated, and this is supplied to the bidirectional signal transmission means (11) via the transmission section (32). Then, the signal is supplied from this bidirectional signal transmission means (11) to the computer (4) via the receiving section (8) on the transmitting side.
4), the address data ADs of the seat where the user is seated is calculated from the address data ADp, and this computer (4) selects the control data DC1 (address data ^D).
B and selection data CH) is generated, multiplexed with the video signal and the audio signal, and supplied to the bidirectional signal transmission means (11). Then, each terminal device (20F>
.

The control data DC1 is separated by the separation unit (26) of (20B), and compared in the microcomputer (260) to see if it matches the address data from the unique address generation unit (31). Then, the terminal device (20B) arranged on the seat where the user is seated matches the selection section (20B).
In 6), an audio signal is selected based on the selection data CI included in the control data DC2.

Thereby, for example, the audio output terminal (29) to which the headphones (30) are connected can be placed on the seat where the user is sitting.

G. Example Hereinafter, an example of the present invention will be described with reference to FIG. This example is a video signal inside an aircraft.

This is applied to the transmission of audio signals, etc.

G1 Description of the Transmitting Side In FIG. 1, (1a) to (lc) are video tape recorders installed on the transmitting side, such as in the crew cabin of an aircraft. The video tape recorders (1a) and (1b) have terminals ■ to which the video signal is output, terminals R and R to which the left audio signal and right audio signal in the language of the first country are output, and A terminal is provided to output a monaural audio signal in a language. In addition, a video tape recorder (LC)
) is provided with a terminal V to which a video signal is output, and terminals R and R to which a left audio signal and a right audio signal are output.

Further, (2a) to (2d) are compact disc players (CD players), and these compact disc players (2a) to (2d) have terminals and R to which the left audio signal and the right audio signal are output. It is provided.

Further, (3) is a CADA encoder used in a conventionally well-known cable digital audio/data transmission system (CADA system). A CADA system is, for example, a system that time-division multiplexes multiple digital audio signals and uses the bandwidth of one vacant CATV TV channel (
6MIIz), and is a system that can transmit music etc. extremely efficiently without sacrificing sound quality. The CADA encoder (3) is configured with an A/D converter and a shift register, and converts multiple audio signals into A/D converters.
The digital signals are converted into digital signals by a D converter, inputted in parallel to predetermined positions of a shift register, and serially outputted from the shift register at high speed, thereby performing time division multiplexing. Note that not only digital audio but also control data can be multiplexed.

Video tape recorders (1a) and (1b) as described above
Audio signals obtained at the terminals R and A of the video tape recorder (IC), audio signals obtained at the terminals R of the compact disc players (2a) to (2d), and audio signals obtained at the terminals R of the compact disc players (2a) to (2d). are each encoder (3)
supplied to

Further, (4) is a master controller consisting of a computer that performs in-flight management. As described later, the receiving side receives control data DC2 (address data indicating the seat ^D
, when channel selection data CI (and volume data VR included) are supplied, address data AD' indicating the seat after the seat indicated by address data AD is calculated, and from this master controller (4) address data AD
', channel selection data C)1 and volume data VR
Control data DC1 containing the following is generated. This control data DC1 is supplied to the encoder (3).

In the end, the output terminal O of the encoder (3) receives a digitally converted signal of the plurality of audio signals supplied and a time-division multiplexed signal Sc8 of the control data DC1, and each signal Sc8 is changed. is supplied to the frequency generator (5d), and vsn <
It is modulated to M using the vestigial sideband) method.

Further, the video signals obtained at the terminals V of the video tape recorders (1a) to (1c) are transmitted to the video modulators (5a) to (5c).
), and is AM-modulated using the VSB method. The modulators (5a) to (5d) are designed to sequentially modulate frequency bands every two channels to prevent cross-modulation, for example, on 60 or more television broadcast channels.

Furthermore, the output signals of the modulators (5a) to (5d) are transmitted to the adder (
6) and frequency multiplexed. And the adder (
The frequency multiplexed signal SMF from 6) is sent to a demultiplexer (7).
is supplied to one end of a leaky cable (11) constituting a bidirectional signal transmission means. The other end of this leaky cable (11) has a terminating resistor (
12) is connected and terminated. This leaky cable (11) is, for example, a coaxial cable with a spiral cutout around it to increase the amount of signal leakage.

Explanation of G2 Receiving Side In addition, each passenger seat of an aircraft is individually provided with a terminal device. The figure shows 21 [1i1 terminal devices (20
F), (20B) is shown.

In the terminal device (20F), (21) is an antenna for capturing the frequency multiplexed signal SMF leaking from the leaky cable (11). The frequency multiplexed signal SMF captured by this antenna (21) is passed through a splitter (22) to a TV tuner (23) and a CADA tuner (24).
). The tuner (23) is a modulator (5a) ~
(5c) is configured to be able to selectively receive channels in the output frequency band, and the channel selection is made in accordance with the key operations on the control panel (25). ) controlled by The video signal output from the tuner (23) is supplied via a signal processing circuit (27) to a display device (28) made of a flat cathode ray tube, liquid crystal display, or the like.

Further, the tuner (24) is configured to selectively receive channels in the output frequency band of the modulator (5d). Time division multiplexed signal SC output from this tuner (24)
A is supplied to the CADfl decoder (26). The decoder (26) is configured to operate almost in the opposite manner to the above-mentioned CADA encoder (3), and is controlled by a microcomputer within the decoder (26) to extract a desired audio signal from the time division multiplexed signal Sc8. , time division multiplexed signal S
Control data DCt is taken out from CA.

The audio signal extracted by this decoder (26) is supplied to headphones (30) via an audio output terminal (29).

Further, (31) is an address ROM, and unique address data ADF indicating the seat where this terminal device (20F) is arranged is written in this address ROM (31). ) is supplied to the microcomputer of the decoder (26). In the microcomputer, the control data DCz extracted from this address data ADF and the time division multiplexed signal Sc8
address data AD' included in the control data DC1, and when they match, the decoder (26) extracts the audio signal based on the channel selection data CH included in the control data DC1, and controls the volume based on the volume data VR. be done.

Also, when a reception channel is selected by key operation on the control panel (25), the decoder (26)
control data D including address data ADF, channel selection data CH, and volume data VR
C2 is generated, and this control data DC2 is sent to the transmitter (32
) and is modulated to a frequency other than the output frequency band of the modulators (5a) to (5d), and then supplied to the key cable (11) via the duplexer (22) and antenna (21). Ru.

Although not mentioned above, this data is supplied from the leaky cable (11) to the receiver (8) via the transmitting side duplexer (7), demodulated, and then sent to the master via the encoder [3]. It is supplied to the controller (4).

FIG. 3 shows the decoder (26) and control panel (25) in more detail. In FIG. 3, parts corresponding to those in FIG. 1 are denoted by the same reference numerals.

In the figure, a television tuner (23) is controlled by a microcomputer (260) of a decoder (26) in response to key operations on a control panel (25).

Further, the time division multiplexed signal ScΔ from the CADA tuner (24) is sent to the carrier regenerator (261) of the decoder (26).
and a command decoder (262).

It is supplied to shift registers (263) and (264).

From the carrier regenerator (261), the time division multiplexed signal SCA
A clock signal synchronized with is obtained, and this clock signal is supplied to the microcomputer (260), as well as the controller decoder (262) and shift register (263).
.

(264). And the command decoder (
262) from the time division multiplexed signal SCA.
C1 is taken out, and this control data DC1 is sent to the microcomputer (
260). In addition, the shift register (263
), (264) are supplied with a launch signal from the microcomputer (260) at a predetermined timing, and predetermined audio signals are taken out from the shift registers (263), (264). That is, as mentioned above, the address R
When the address data ADF supplied from the OM (31) and the address data AD' included in the control data DC+ match, the shift registers (263) and (2
64') is supplied with a launch signal at a timing corresponding to the channel selection data CI included in the control data DC1, and the audio signal is extracted. Note that the time division multiplexed signal SCA from the CADA tuner (24) is sent to the microcomputer (24).
60), and the above-mentioned launch signal is formed based on this.

In addition, the audio signals taken out from the shift registers (263) and (264) (in the case of stereo, the left signal and right signal, respectively, and in the case of monaural, the same signal) are respectively D/
A converter (265) and (266), volume adjustment volume (267), amplifier (26B) and (269)
The signal is supplied to audio output terminals (29) and (29) via.

In addition, in the control panel (25), (25a
) is the TV selection key, (25b) is the music selection key, (
25c) is the channel up key, (25d) is the channel down key, (25e) is the channel indicator,
(25f) is an operator for adjusting the volume, (25g) is a steward desk call key, and (25h') is a reading light key.

In this case, pressing the TV selection key (25a) will select the TV channel, and the channel up key (25c) will select the TV channel.
), press the channel down key (25d) to turn on the TV tuner (23) under the control of the microcomputer (260).
You can change the receiving channel. In addition, the microcontroller (2
60), control data DC2b including address data ADF, channel selection data CI+, and volume data Vl'l set with the volume adjustment operator (25f) is generated, and this control data DC2 is transmitted to the transmitter (32). after being modulated by the antenna (21) via the duplexer (22).
).

Also, press the music selection key (25b') to select the music channel, and press the channel up key (25c).
Press the channel down key (25d) and the microcontroller (
260), control data DC2 including address data ADF, channel selection data CI, and volume data Vl'l set with the volume adjustment operator (25f) is generated, and this control data DC2 is transmitted to the transmitter (32). After being modulated by the signal, the signal is supplied to the antenna (21) via the duplexer (22). In this case, for example, the signal processing circuit (27) is controlled by the microcomputer (260), and the video signal is muted.

Furthermore, when the stewardess call key (25g) is pressed, control data (including address data 8 DF and stewardess call data) is generated from the microcomputer (260), and this control data is supplied to the transmitter (32). After being modulated, the duplexer (22) and antenna (21)
is supplied to the leaky cable (11) via. This control data is supplied from the leaky cable (11) to the receiver (8) via the transmitting side branching filter (71), demodulated, and then supplied to the encoder (3).Then, based on this control data, The switch box (40) is controlled by a CPU (not shown) in the encoder (3),
The stewardess call light (41a) corresponding to the seat after the seat indicated by the address data ADF is made to emit light. When the reading light key (25h) is pressed, control data (including address data ADF and reading light data) is generated from the microcomputer (260), and this control data is supplied to the transmitter (32) and modulated. After that, it is supplied to the leaky cable (11) via the duplexer (22) and antenna (21). This control data is supplied from a leaky cable (11) to a receiver (8) via a duplexer (7) on the transmission side, demodulated, and then supplied to an encoder (3). Based on this control data, the switch box (40) is controlled by the CPU in the encoder (3), so that the reading light (42a) corresponding to the seat after the seat indicated by the address data ADF lights up. Ru.

The terminal device (20B) is also configured in the same manner as the above-mentioned terminal device (20F>).In this case, the address ROM (31)
has written unique address data ADB indicating the seat where this terminal device (20B) is located.
This address data ADB is supplied to the microcomputer of the decoder (26). In addition, (41b) and (42b)
are a stewardess call light and a reading light respectively corresponding to the seat after the seat indicated by the address data ADB.

In addition, other terminal devices are similarly configured although not shown.

In addition, most of the terminal devices are display devices (28).
, control panel (25), etc.) are placed on the back of the seat, and an audio output terminal (29) is placed on the armrest (see Figure 2).

This example is configured as described above, and the video tape recorder (
The encoder (3) time-division multiplexes the video signals output from the video tape recorders (1a) to (IC) and the audio signals output from the compact disc players (2a) to (2d). ) are modulated by modulators (5a) to (5d) and added to form a frequency multiplexed signal SMF.

This frequency multiplexed signal SMF is then supplied to the leaky cable (11) and transmitted to the receiving side. Then, in the terminal device on the receiving side, a desired one can be selected from the plurality of video signals and audio signals transmitted as the frequency multiplexed signal SMF according to key operations on the control panel (25).

In this case, for example, when the user presses the TV selection key (25a) on the control panel (25) of the terminal device (201') placed on the seat in front of the seat in which the user is seated, the TV channel is selected and , channel up key (
25c), press the channel down key (25d) to change the reception channel. Then, the video signal of the selected channel is output from the TV tuner (23), and is sent to the display device (28) via the signal processing circuit (27).
), and an image based on that video signal is displayed.

Also at this time, the microcomputer (260) of the decoder (26)
Address data ADF and channel selection data CH
Control data DC2 including volume data VR is generated, and this control data DC2 is modulated by a transmitter (32) and then supplied to the leaky cable (11) via a duplexer (22) and an antenna (21). , this data is supplied from the leaky cable (11) to the receiver (8) via the transmitting side duplexer (7), demodulated, and then sent to the encoder (
3) to the master controller (4). Then, in the master controller (4), address data ADFI indicating the seat after the seat indicated by the address data ADF included in the control data DC2 is calculated, and from this master controller (4) address data ADs and channel selection data are calculated. Control data DC1 including CI+ and volume data VR is generated. and,
This control data (lcx) is supplied to the encoder (3), multiplexed with the audio signal and video signal, and supplied to the leaky cable (11).Then, in each terminal device, the control data DCI is extracted by the decoder (26). Then, the address data supplied from the address ROM (31) and the address data ADR included in the control data DC1 are compared.In this case, the address data supplied from the address ROM (31) is compared with the address data ADR included in the control data DC1. Since the address data supplied from the address ROM (31) match in the ADH, the shift registers (263') and (264) of the decoder (26) of the terminal device (20B) are
0) is supplied with a latch signal at a timing corresponding to the channel selection data CI included in the control data DC1, an audio signal corresponding to the video signal output from the TV tuner (23) is extracted, and the audio signal is output from the audio output terminal (23). 29
). Further, the volume (267) is controlled by the microcomputer (260) according to the volume data VR included in the control data DC1, and the volume is adjusted.

Therefore, the control panel (20F) of the terminal device (20F) placed on the seat in front of the seat where the user is seated.
When selecting a TV channel using the key operation in step 5), the image of the selected channel can be observed on the display device (28) of the terminal device (20F), and the image of the selected channel can be observed on the terminal device (20B) placed on the seat where the user is seated. audio output terminal (2
You can listen to the corresponding audio by connecting headphones (3o) to 9).

Also, when selecting a music channel by operating the keys on the control panel (25) of the terminal device (20F) placed on the seat in front of the seat where the user is seated, the audio signal of the TV channel mentioned above is also used. By a similar operation, the audio signal of the selected channel is obtained at the audio output terminal (29) of the terminal device (20B) at the seat where the user is seated. Therefore, the headphones (30) can be connected to the audio output terminal (29) of the terminal device (20B) to listen to the audio.

At this time, the signal processing circuit (27) is controlled by the microcomputer (260) in the terminal device (20F), the video signal is muted, and a black screen is displayed on the display device (2nd).

In addition, the steward desk call key (25g) of the terminal device
), the control data indicating that the reading light key (25h) has been pressed is modulated by the transmitter (32) and then sent to the duplexer (22).
) and the leaky cable (1) via the antenna (21).
1). This data is then supplied from the leaky cable (11) to the duplexer (7) and IQ receiver (8) on the transmitting side, where it is demodulated and then supplied to the CPU of the encoder (3), where it is processed as described above. The corresponding stewardess call lights (41a), (41b) and reading lights (42a), (42b) are controlled to emit light in this manner.

In this way, according to this example, a plurality of video signals, audio signals, etc. are frequency multiplexed on the transmitting side, and the leaky cable (11
) to the receiving side terminal device (20F).

(20B), and the terminal device (20B) on the receiving side (
Since the control data from 20F) and 20B is supplied to the transmitting side via the leaky cable (11), the wiring becomes simple and the device can be simplified.

Further, according to this example, the display device (28
), the image can be observed through the audio output terminal (29) of the terminal device (20B) placed on the seat where the user is seated.
), you can listen to the audio by connecting the headphones (30) to the headphone (3o), so the lead wire of the headphones (3o) will not get in the way of other passengers, or the seat distance (distance between the front and rear seats).
It is possible to avoid the inconvenience of having to prepare headphones (30) with different lead wires each time the headphones are changed.

In addition, apart from the above-mentioned embodiment, as shown in FIG.
, audio output terminal (29), etc.) may be disposed on the armrest portion of the seat, and the display device (28) may be disposed on the back of the seat. In this case, the user selects a TV channel or a music channel by operating the keys on the control panel (25) of the terminal device (20B) placed on the seat where the user is sitting. While observing the image on the display device (28) of the terminal device (20F) placed on the seat in front of the user, the user can also view the image on the audio output terminal (29) of the terminal device (20B) placed on the seat where the user is seated. Connect the headphones (30) and listen to the audio.

Therefore, in this case, the relationship between the video signal and the audio signal in the above embodiment is reversed. The control data DC2 from the terminal device does not need to include the volume data VR, and the master controller (4) on the transmitting side
Address data 8D' indicating the seat in front of the seat indicated by address data AD included in control data DC2 is calculated. Furthermore, in the terminal device on the receiving side, the address data A[l' and the address R of the control data DC1 from the sending side are
When the address data from OM (31) matches,
Channel selection data CB included in control data DCi
TV tuner (2) by microcontroller (260) based on
3) The reception channel is controlled.

The operation of this example in FIG. 4 is as follows. For example, the TV selection key (25a) on the control panel (25) of the terminal device (20B) placed on the seat where the user is seated.
) to select a television channel, and by pressing the channel up key (25c) or channel down key (25d) to change the receiving channel.

The microcomputer (260) then shifts the shift register (263) of the decoder (26).

(264) is supplied with a launch signal at a timing corresponding to the receiving channel, and the audio signal of the selected channel is extracted and supplied to the audio output terminal (29).

At this time, the polyum (267) is controlled by the microcomputer (260) based on the position of the operator (25f), and is set to a predetermined volume.

Also at this time, the microcomputer (260) of the decoder (26)
Address data ADB and channel selection data CH
control data DC2 is generated, and this control data D
C2 is modulated by the transmitter (32) and then sent to the demultiplexer (22)
and the leaky cable (11) via the antenna (21).
) and this data is fed to the leaky cable (11)
The signal is supplied to a receiver (8) via a duplexer (7) on the transmitting side, demodulated, and then supplied to a master controller (4) via an encoder (3). Then, in the master controller (4), address data ADF indicating the seat in front of the seat not indicated by the address data ADB included in the control data DC2 is calculated, and from this master controller (4), address data ADF and channel selection are calculated. Control data DCI (including data CI) is generated. Then, this control data DC□ is sent to the encoder (3).
audio signal.

Leaky cable multiplexed with video signal (11)
supplied to Then, each terminal device has a decoder (26
), the control data DC1 is taken out and stored in the address ROM (
31) Address data and control data DC supplied from
The address data ADF included in □ is compared. In this case, since the address data supplied from the address ROM (31) of the terminal device (20F) placed on the seat in front of the seat where the user is seated matches in the ADF, the TV of the terminal device (20F) The receiving channel of the tuner (23) is controlled by the microcomputer (260) based on channel selection data CH included in the control data DCz. Then, the video signal of the selected channel is output from the TV tuner (23), and the signal processing circuit (27)
) is supplied to the display device (28), and an image based on the video signal is displayed.

Therefore, when a user selects a TV channel by operating the keys on the control panel (25) of the terminal device (20B) arranged on the seat where the user is seated, the selected TV channel is selected on the display device (28) of the terminal device (20F). In addition to being able to observe the images of the selected channels, the user can listen to the corresponding audio by connecting headphones (30) to the audio output terminal (29) of the terminal device (20B) placed on the seat where the user is sitting.

Furthermore, when the user selects a music channel by operating the keys on the control panel (25) of the terminal device (20B) placed on the seat where the user is seated, the same process as when selecting the TV channel described above is performed. Through the operation, the audio signal of the selected channel is obtained at the audio output terminal (29) of the terminal device (20B) of the seat where the user is seated, and the control data DCt is obtained at the terminal device (20F).
The signal processing circuit (27) is controlled by the microcomputer (260) based on the channel selection data CH included in the video signal, the video signal is muted, and a black screen is displayed on the display device (28). Therefore, the headphones (30) can be connected to the audio output terminal (29) of the terminal device (20B) to listen to the audio.

In this example in FIG. 4 as well, the user can listen to the audio by connecting the headphones (30) to the audio output terminal (29) of the terminal device (20B) on the seat where the user is seated.
The same effects as in the above embodiment can be obtained. Further, according to this example, even if the seat pitch is large (for example, first class), the control panel is located in the armrest, so there is the advantage that operation is easy.

In addition, in the above embodiment, the master controller (
Although the address data is processed in step 4), it may be processed when the control data DC2 is generated at the receiving terminal. Further, although the above-described embodiments apply the present invention to an information transmission device inside an aircraft, it can be similarly applied to an information transmission device inside a vehicle such as a train or a bus, or inside a theater or stadium. In addition, the above embodiment is a terminal device (20
F).

(20B) is provided for m1 M seats, but it may also be placed near the seats, for example, on a table attached to the trunk or appetizer seat.

Effect of H invention According to the present invention described above, a plurality of video signals.

Since audio signals and the like are multiplexed and transmitted by a single signal transmission means, the wiring becomes simple and the device can be simplified. Further, according to the present invention, the video signal or audio signal selected by - of the plurality of terminal devices is outputted from the other terminal devices, so that the video signal or the audio signal selected by For example, headphones can be connected to the terminal device, making it possible to avoid inconveniences such as the lead wires of the headphones interfering with other passengers, or having to prepare headphones with different lead wires each time the seat pitch is changed. It is possible to improve atoms.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing an embodiment of the present invention, FIG. 3 is a specific configuration diagram of main parts of a terminal device, FIG. 2 is a diagram for explaining one embodiment, and FIG. FIG. 7 is a diagram for explaining another embodiment. (1a) to (1c) are video tape recorders, (2a)
~(2d) is a compact disc player, (3) is a C
AIIA encoder, (4) is the master controller,
(5a) to (5d) are modulators, (8) are receivers, (1
1) is a leaky cable, (20F) and (20B) are terminal devices, (21) is an antenna, (23) is a TV tuner, (24) is a CADA tuner, (25) is a control panel, (26) is a CA[ lA decoder, (27
) is a signal processing circuit, (28) is a display device, (29) is an audio output terminal, (30) is a headphone, and (31) is an address ROM. (32) is a transmitter.

Claims (1)

[Claims] On the transmitting side, a plurality of video signal sources, a plurality of audio signal sources,
a computer, and a transmitter that multiplexes video signals from the plurality of video signal sources, audio signals from the plurality of audio signal sources, and control data from the computer, and supplies the multiplexed signal to the bidirectional signal transmission means. and a receiving section that receives control data from the receiving side supplied from the bidirectional signal transmission means and supplies it to the computer, and the receiving side receives control data from the bidirectional signal transmission means. a selection section that selects a predetermined video signal and audio signal from the supplied multiplexed signal; a video display section and an audio generation section to which the video signal and audio signal selected by the selection section are supplied; a separation unit that separates the control data from the transmitting side from the multiplexed signal supplied from the signal transmission means; a unique address generation unit; a selection operation unit; the control data separated by the separation unit; and the selection operation. A microcomputer is supplied with a signal from the unit and address data from the unique address generation unit, and controls the selection unit and generates control data to the transmission side, and a microcomputer that transmits the control data from this microcomputer to both of the above. a plurality of terminal devices each having a transmitting section that supplies a signal to a destination signal transmission means, and a video signal or an audio signal selected by one selection operation section of the plurality of terminal devices is transmitted to the other terminal devices. An information transmission device characterized in that an information transmission device outputs a