JPS63189089A - Information transmitting equipment - Google Patents

Abstract

PURPOSE:To simplify an information transmitting device which transmits plural signals by multiplexing plural video signals, sound signals and so on and transmitting them with the aid of a single signal transmitting means. CONSTITUTION:As the plural video signals, the plural sound signals and data for computer software are multiplexed by a transmitting device and supplied to the terminal equipment 30 of a receiver side through the signal transmitting means 21, a desired video and sound can be looked and listened by optionally taking out the video signal and the sound signal among the video signals and the sound signals, which are obtained from the plural video signals and the plural sound signals taken out from the multiplexed signals and a computer 37, with the aid of selecting devices 33-36. Then control data SC1 is multiplexed by the transmitting device and supplied to the terminal equipment 30 of the receiving side. As the selection by the selection devices 33-36 is forbidden by this control data SC1 and one video signal and one sound signal are compulsorily selected, the reception state of the terminal equipment 30 can be compulsorily controlled in a fixed state by a transmitting side.

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. Problems to be solved by the invention E. Means for solving point H8 (Fig. 1) F. Effect G. Example G1 Explanation of transmitting side G2 Receiving side Description H Effect of the Invention A Industrial Application 1 The present invention provides a method for displaying a plurality of images on a video display device, an audio generator, etc., which are individually installed in or near the passenger seats of, for example, airplanes, trains, and buses. The present invention relates to an information transmission device suitable for use in transmitting signals, audio signals, etc. 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 etc. in parallel,
The apparatus is simplified by multiplexing a plurality of video signals, audio signals, etc. and transmitting them using a single signal transmission means. In addition, control data can be transmitted along with video and audio signals to control the reception status of the terminal device, and when controlling reception, the output operation of unnecessary video and audio signal sources is temporarily stopped, and after the control is released, By canceling the temporary stop of the signal source, the user's usability is improved.

C. Prior Art For example, U.S. Pat. No. 4,584,603 teaches providing separate video displays for passenger seats in vehicles such as aircraft. That is, video displays are individually provided in 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 to solve the problem The present invention provides (1) a plurality of video signal sources (1a) to (ld).

Video signals from (2), (3), multiple audio signal sources (1a) to (ld), (2), (3), (4
a), audio signals from (4b), data for a plurality of computer software (9a) to (9h) and control data SCt t ! ; a transmitting device that multiplexes and transmits C2; a signal transmitting means (21) that transmits the multiplexed signal output from this transmitting device; and computer software from the multiplexed signal transmitted by this signal transmitting means (21). A device a (36) for extracting the data (9a) to (9h) for the combiator software, a computer (37) to which the data (9a) to (9h) for the combiator software extracted by this device are supplied, and a computer (37) for extracting the data for the combiator software from the multiplexed signal. Multiple video signals, audio signals and computers (37)
A desired video signal from the video signal and audio signal obtained from the
Selection devices (33) to (36) for selectively extracting audio signals
), control data SCI from the multiplexed signal! S
It has a device (36) for extracting C2, a video display device (35a) to which selected video signals and audio signals are supplied, and an audio generator (35c), and controls data SCL.
This is an information transmission device consisting of a plurality of terminal devices (30) in which some or all of the selections by the selection devices (33) to (36) are prohibited and one video signal or audio signal is forcibly selected. . Further, the present invention provides video signal sources (la) to (l) that output other video signals and audio signals when one video signal and audio signal are forcibly selected in the terminal device (30).
d), (2), (3) Audio signal source (la) ~(
ld), (2), (3), (4a),
(4b) and a part or all of the output operation of the combiator (37) is temporarily stopped, and when the forced selection by the control data SC1 is canceled, the video signal source (4b) that outputs other video signals and audio signals ( 1a) ~ (ld)
, (2) , (3) , Audio signal source (la) ~
(ld), (2).

(3), (4a), (4b) and the output operations of the computer (37) are restarted.

F. Function In the above configuration, a plurality of video signals, audio signals, and computer software data are multiplexed by the transmitting device and sent to the receiving terminal device (3) via the signal transmitting means (21).
0), the terminal device (30) selects devices (33) to (36) from a plurality of video signals and audio signals extracted from the multiplexed signal and video signals and audio signals obtained from the computer (37). By selectively extracting the video signal and the audio signal, desired video and audio can be viewed. In addition, in the above configuration, the control data S
Cs is multiplexed by the transmitting device and supplied to the receiving terminal device (30) via the signal transmission means (21), and the selection devices (33) to (36) are multiplexed by the control data SC1.
) is prohibited, and one video signal and one audio signal are forcibly selected.
It is possible to forcibly control the reception state of the receiver to a constant state. In addition, when the control data SCx prohibits selection by the selection devices (33) to (36) of the terminal device (30) and one video signal or audio signal is forcibly selected, other video signals or audio signals When the output operation of the signal source is temporarily stopped and its forced selection is canceled, the other video signal.

Since the output operation of the audio signal source is restarted, the terminal device (3
After the control of the reception state of 0) is released, the video and audio before the forced control can be continuously viewed.

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 (1d) are video tape recorders provided on the transmitting side, such as in the crew cabin. The videotape recorder (1a) is for override use, and is loaded with a cassette tape in which information on how to put on a life jacket, etc. is recorded. Also, a video tape recorder (1b)
~(1d) is loaded with a cassette tape on which a movie is recorded. These video tape recorders (1a) to (
1d) is provided with a terminal V to which a reproduced video signal is output, and terminals R and A to which a reproduced audio signal is output.

These video tape recorders (1a) to (1d) are compatible with two languages; terminals R and R are output terminals for left and right audio signals in the language of the first country, respectively, and terminal A is This is an output terminal for monaural audio signals in the language of the second country.

Further, (2) is a television tuner, and this television tuner (2) is provided with a terminal V to which a video signal is output, and a terminal R to which an audio signal is output. Terminals R and R are output terminals for the left audio signal and right audio signal, respectively.

In addition, (3) is a still image playback device, which plays compact discs, so-called CDs, on which maps, airport guide maps, etc. are recorded.
It is designed to play ROM. This still image reproducing device (3) is provided with a terminal V to which a still image video signal is output, and a terminal A to which an audio signal is output.

Further, (4a) and (4b) are audio playback machines each comprising three compact disc players (CD players) and three tape recorders;
) and (4b) are provided with six pairs of terminals R to which audio signals are output, respectively.

Terminals R and R are output terminals for the left audio signal and right audio signal, respectively.

Further, (5) is a control device, (5a) is a microphone, (5b) is a polyurethane that adjusts the level of the audio signal from the microphone (5a), (5c) is an announce key, (5d) is an override key, (5e)～
(5g) are video tape recorders (lb) to (1d), respectively.
) is a Bose key to put the cursor into a pause state. Video signals obtained at terminals (1) and audio signals obtained at terminals R and A of the video tape recorders (1a) and (1b) are respectively supplied to a control device (5). The control device (5) is provided with an output terminal V for a video signal and an output terminal -R, A for an audio signal.
The video signal obtained from the terminal ■ of b) and the audio signal obtained from the terminals R and A are output, but when the override key (5d) is pressed to turn on the override,
A video signal obtained at terminal V and an audio signal obtained at terminals R and A of the video tape recorder (1a) are output. Also, when pressing the announce key (5c) to turn on the announcement, connect the microphone (5a) to the output terminal A.
) is output.

Further, (6) and (7) are CAD^ encoders 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 (6MHz) of one vacant CATV TV channel.It allows music, etc. to be transmitted extremely efficiently without sacrificing sound quality. It is a system that can transmit data. The CAI) A encoders (6) and 7) are configured with an A/D converter and a shift register, convert a plurality of audio signals into digital signals with the A/D converter, and input the signals to predetermined positions of the shift register. The configuration is such that time division multiplexing is performed by inputting the signals in parallel and outputting them serially at high speed from this shift register. Note that not only digital audio but also control data and data for computer software can be multiplexed.

Output terminal R of the above-mentioned control device (5).

The audio signal obtained at A is supplied to an encoder (6). In addition, the audio signals obtained at the output terminals R and A of the video tape recorders (1c) and (1d) are transmitted to the encoder (
6). Furthermore, the audio signals obtained at the output terminals R and R of the chainer (2) and the output terminal A of the still image player (3) are supplied to an encoder (6).

In addition, the audio signal obtained at R is sent to the encoder (6) via the control device (5) through the 6 pairs of output terminals of the audio player (4a), and the 3 pairs of output terminals of the R and audio player (4b). ) and (7).

In addition, the override key (
5d), announce key (5c), pause key (5e
)~(5g) is pressed, this control device (
5), control data SCr with contents corresponding to the pressed key is generated, and this control data SC
1 is supplied to the encoder (6).

The encoder (6) is provided with output terminals A to E from which pause control signals are output in accordance with the control data SCL, and the pause control signals obtained at these output terminals A to E cause the video tape recorder (lb ) ~(l
d) The audio players (4a) and (4b) are controlled. That is, when the override key (5d) and the announce key (5c) are pressed, a pause control signal is output to the output terminals A-E, and the video tape recorder (lb) to
(ld), the audio playback devices (4a) and (4b) are all in a pause state. Also, pause key (5e) ~ (5g
) is pressed, pause control signals are output to output terminals A to C, respectively, and video tape recorders (1b) to (
1d) are each put into a pause state. Note that when the override key (5d), announce key (5c), and pause keys (5e) to (5g) are pressed again, the override is turned off, the announcement is turned off, etc., and the above-mentioned video tape recorders (1b) to (ld) are pressed. , the pause control of the audio players (4a) and (4b) is canceled.

Further, (8) is a master controller consisting of a computer that performs in-flight management, and this master controller (8) generates control data SCz that controls the terminal device on the receiving side, and this control data S
C2 is supplied to the encoder (6).

This control data SC2 is, for example, data for controlling the brightness of the display device of the terminal device, data for requesting data indicating the status of the terminal device, and the like.

Also, (9-) is a ROM in which menu data is written.
, (9b) to (9h) are ROMs in which different game data is written. This ROM (9a) to (9h)
Computer software data S read out from
D is supplied to a signal processing circuit (10), and after addition of an error correction code, etc., is supplied to an encoder (7).

The control data SCr and SC2 are also supplied from the encoder (6) to the encoder (7).

Further, at the output terminal O of the encoder (6), a signal 5CAI obtained by time-division multiplexing of the digitally converted plurality of supplied audio signals and the control data SCr and SC2 is obtained, and this signal Sc type is Modulator (llf
) and AM modulated using the VSB (vestigial sideband) method. Furthermore, the output terminal 0 of the encoder (7) receives a signal Sc obtained by digitally converting the plurality of supplied audio signals, time-division multiplexed control data SCI + SC2, and computer software data S0.
^2 is obtained, and this signal 5CA2 is supplied to the modulator (l1g) and subjected to AM conversion using the VSB method.

Furthermore, the video signal obtained at the output terminal (■) of the control device (5) is supplied to the modulator (lla), and the audio signal obtained at the output terminal A of the control device (5) is supplied to the modulator (lla). be done. Weird 1llll device (lla
), the audio signal is FM modulated and frequency multiplexed with the video signal to make it similar to a normal television signal, and then AM modulated using the VSB method.

Also, video tape recorders (LC), (LD)
.

Tuner (2) and still image player (3) output terminal■
The video signals obtained are transmitted through modulators (llb) to (li
e) and is AM modulated using the VSB method.

Here, the modulators (lla) to (l1g) are configured to sequentially modulate frequency bands every two channels to prevent cross-modulation, for example, on 60 or more television broadcast channels.

Further, the output signals of the modulators (lla) to (l1g) are supplied to an adder (12) and frequency multiplexed. The frequency-multiplexed signal SMF from the adder (12) is supplied via a duplexer (13) to one end of a leaky cable (21) constituting a bidirectional signal transmission means. The other end of this leaky cable (21) is connected to a terminating resistor (22) for termination. This leaky cable (21) is, for example, a coaxial cable with a spiral cutout around it to increase the amount of signal leakage.

Explanation of G2 Receiving Side Further, (30) is a terminal device provided individually in the passenger seat of the aircraft, and only one terminal device is shown in the figure. In this terminal device (30), (31) is an antenna for capturing the frequency multiplexed signal SMF leaking from the leaky cable (21). The frequency multiplexed signal SMFI supplemented by this antenna (31) is supplied to a television tuner (33) and a CAD^chner (34) via a duplexer (32). The tuner (33) has modulators (lla) to (
The tuner (34) is configured to be able to selectively receive channels in the output frequency band of the modulator (34).
These tuners (33
) and (34) are controlled by a selection display (35).

Further, the video signal and the audio signal outputted from the tuner (33) are supplied to the selection display device (35), and the time division multiplexed signal 5CA1 outputted from the tuner (34).
Alternatively, 5CA2 is supplied to the CADA decoder (36). The CADA decoder (36) is connected to the above-mentioned CAD encoder (6), +? ), the control data SCz, SC2, a desired audio signal, and data for computer software are controlled by the selection display device (35) from the time division multiplexed signal Sc^1 or Sc^2. is taken out. That is, the CADA decoder (36) is configured with a shift register and a D/A converter, and receives the time division multiplexed signal 5CAI or 5cA.
2 is serially input to a shift register, and control data SCs,
SC2 is taken out in parallel, and the selection display device (
35) from a predetermined position of the shift register according to the control of the computer software data SD.
are retrieved in parallel.

In this case, the audio signal is converted into an analog signal via a D/A converter. This D/A converter has two
Since two pieces are used, two pieces in total are sufficient. The audio signal extracted by this CADA decoder (36) is supplied to a selection display device (35). Also, this CAD^decoder (
The computer software data SO retrieved at step 36) is supplied to the personal computer (37) and written into the RAM.

Further, FIG. 2 shows an example of the configuration of the panel surface of the selection display device (35), and this panel surface is arranged on the back of the passenger seat as shown in FIG. 3.

In Fig. 2, (35a) is a display device such as a flat cathode ray tube, liquid crystal display, etc., and (35b) is a headphone (
35c) is an audio output terminal to which is connected, and (35d) is a game terminal to which a joystick (35e) etc. for games (see FIG. 1) is connected.

Also, (35f) is the TV selection key, (35g) is the music selection key, (35h) is the channel display, (35i)
is a channel down key, and (35j) is a channel up key. In this case, the TV selection key (35f)
By pressing the channel down key (35i) and the channel up key (353) in sequence, the television channels can be changed in sequence. That is, a TV tuner (
33) and CADA decoder (36)
), the audio signal output from the display device (35
a) includes video tape recorders (1b) to (ld);
, the tuner (2), and the still image player (3) are sequentially displayed on the screen, and the corresponding audio signals are output to the audio output terminal <35b). Here, when the audio signal is in two languages, two channels are assigned to one video signal screen, the first channel is the audio signal in the language of the first country, and the second channel is the audio signal in the language of the second country. An audio signal in this language is output. Also, press the music selection key (35g), channel down key (35i), and channel up key (35i).
By pressing j) in sequence, the music channels can be changed in sequence. That is, the audio signal output from the CADA decoder (36) is changed, and the audio signal output terminal (35b) is connected to the audio player (4a).

The audio signals output from (4b) are sequentially output.

Also, (35k) is the menu display key, (35 father) is the cursor down key, (35m) is the cursor up key,
(35n) is the enter key. In this case, by pressing the menu display key (35k), a video signal based on data from the menu ROM (9a) is supplied from the personal computer (37) to the selection display device (35), and the menu is displayed on the display device (35a). The screen will be displayed.

After selecting a game by moving the cursor on the display screen using the cursor down key (35) and cursor up key (35), press the enter key (35n) to select the game selected from the personal computer (37). Video signals and audio signals based on data from the game ROMs (9b) to (9h) are supplied to the selection display device (35), and the game screen is displayed on the display device (35a), and the audio output terminal (35b) A game audio signal is output.

Further, in FIG. 2, (35p) is a stewardess call key, (35Q) is a reading light key, and (35r) is a volume control.

Further, the selection display device (35) and the like are controlled by a CPU (not shown) in the CADA decoder (36) based on control data SC1 and SC2 taken out by the CADA decoder (36). For example, based on the control data SCI, the transmitting side control device (5
) When the override key (5d) is pressed to turn on the override, the tuner (33) is placed in the reception state of the channel in the output frequency band of the modulator (lla), and the display value W1 of the selection display device (35) is (35a) displays an image of the video signal output to the output terminal V of the video tape recorder (1a), and the audio output terminal (35b)
) so as to obtain an audio signal to be output to the output terminal A of the video tape recorder (1a). Also,
Based on the control data SCz, when the announce key (5C) of the transmitting side control device (5) is pressed to turn on the announcement, the tuner (33) receives the channel in the output frequency band of the modulator (lla). state so that an audio signal from the microphone (5a) can be obtained from the audio output terminal (35b). In this case, the video signal is muted so that no screen is displayed on the display device.

Further, in these cases, the volume is kept constant, for example.

Further, when the CADA encoder (6) or (7) does not function, the control data SCz is obtained in the same way as when the override is on, and at this time, the same reception state as when the override is on is forced. .

When a game is being played, execution of the personal computer (37) is temporarily stopped when controlled in this manner.

In these cases, selection using the television selection key (35f), music selection key (35g), etc. of the selection display device (35), sound IT adjustment, etc. are prohibited.

Note that the override key (5d) and announce key (5C) are pressed again to turn off the override.

When the announcement key is activated, the above-mentioned control is canceled and the original state is automatically restored. In this case, as mentioned above, the video tape recorder (Ib
) to (ld), the pause control of the audio playback devices (4a) and (4b) is canceled, and the video and audio before the control can be continuously viewed. Moreover, when the execution of the personal combiator (37) is temporarily stopped, the execution of the personal computer (37) is also resumed, so that the game can be continued.

Further, when the reception state is forcibly controlled in this way, the channel indicator (35h) displays that it is different from the normal state. In this case, a dedicated display may be provided.

Furthermore, the brightness of the display device (35a) is controlled based on the control data SC2, and the brightness is automatically adjusted to match the brightness of the room. In addition, control data SC2
When requesting data, the CPU of the CADA decoder (36) generates data indicating the status of the selected display device (35) and data indicating the status of the seat belt, reclining, etc. detected by the sensor (39). be done. This data is supplied to the transmitter (38) and modulated to a frequency other than the output frequency band of the modulators (lla) to (l1g), and then sent to the duplexer (32) and the antenna (3).
1,) to the leaky cable (21). Then, this data is sent from the leaky cable (21) to the encoder (
6), and from this CAD^ encoder (6), it is supplied to the master controller (8) for use.

Also, when the steward desk call key (35p) of the selection display device (35) is pressed, the CADA decoder (36)
Control data is generated by the CPU. This data is supplied to a transmitter (38), modulated, and then supplied to a leaky cable (21) via a duplexer (32) and an antenna (31). This data is then supplied from the leaky cable (21) via the duplexer (13) to the CADA encoder (6) on the transmitting side. and,
Based on this data, the CP in the CAD^ encoder (6)
U (not shown) controls the switch box (40) so that the corresponding stewardess call light (41) is illuminated. In addition, a selection display device (35)
When the reading light key (35q) is pressed, control data is generated by the CPU of the CADA decoder (36). This data is supplied to a transmitter (38), modulated, and then supplied to a leaky cable (21) via a duplexer (32) and an antenna (31). This data is then supplied from the leaky cable (21) via the duplexer (13) to the CADA encoder (6) on the transmitting side.

Then, based on this data, CAD^ encoder (6)
The switch pocket (40) is controlled by the CPU inside, and the corresponding reading light (42) is made to emit light.

In addition, as shown in the broken line diagram, when the keyboard (43) is connected to the game terminal (35d), the CADA decoder (
Control data is generated by the CPU 36).

This data is supplied to a transmitter (38), modulated, and then supplied to a leaky cable (21) via a duplexer (32) and an antenna (31).

This data is then supplied from the leaky cable (21) via the duplexer (13) to the CADA encoder (6), and from this CAD encoder (6) to the master controller (8). When this data is supplied, the word processor software data is sent from the master controller (8) to the CADA encoder! 6) , (?
) and is supplied to the terminal device i! as a frequency multiplexed signal via the leaky cable (21). (30) is supplied to the side,
It is loaded into a personal computer (37). In this state, when the user operates the keyboard (43), texts, etc. are transferred to the memory (37) of the personal computer (37).
RAM). In this case, the display value! ! (35
The text etc. that have been created are displayed in a), and the user can make corrections to the text etc. while looking at the display screen. Then, when a termination operation is performed using the keyboard (43), data such as text (ASCII code) is transferred from the memory of the personal computer (37) to the CAD decoder (3).
6) is supplied to the transmitter (38), modulated, and then demultiplexed! (32) and the antenna (31) to the leaky cable (21). This data is then supplied from the leaky cable (21) to the CADA encoder (6) via the branch W (13), and this C^0^
The signal is supplied from the encoder (6) to the master controller (8).

Then, the data such as text is supplied to the disk drive (44) and recorded on, for example, a floppy disk, or the data such as text is supplied to the printer (45) and the text etc. is printed out, or the data such as text is is transmitted to the outside via the communication device (46). Which of these should be selected can be determined by, for example, the user's keyboard (
43), and the selection data is supplied to the master controller (8) together with data such as sentences. Note that the word processor software data may be written in the ROM of the personal computer (37) in advance and used. Incidentally, the floppy disk or printed paper on which the information has been recorded in this manner is received by the user when, for example, the user gets off the airplane.

This example is configured as described above, and the video tape recorder (
la) ~ (ld), tuner (2), still image player (
3) Video signals outputted from video tape recorders (1a) to (ld), tuner (2), still image playback device (3), and audio signals outputted from audio playback devices (4a) and (4b). The output signals Sc^ll5C^2 of the time-division multiplexed CAD^encoders (6) and (7) such as
The signals are respectively modulated by modulators (lla) to (l1g) and added to form a frequency multiplexed signal SMF. This frequency multiplexed signal SMF is then supplied to the leaky cable (21) and transmitted to the receiving side. Then, the terminal device on the receiving side (
In 30), a desired signal can be selected from a plurality of video signals, audio signals, etc. transmitted as frequency multiplexed signals SMF by controlling the selection display device (35).

In addition, data indicating that the reading light key (35q) or stewardess call key (<35p) has been pressed, data indicating the selection state of the selection display device (35), etc. from the terminal device (30) are modulated by the transmitter (38). After that, it is supplied to the leaky cable (21) via the duplexer (32) and the antenna (31). And this data is stored on a leaky cable (
21) is supplied to the CAD encoder (6) via the demultiplexer (13). Then, this data is supplied to the CPU in the CAD encoder (6) and the reading light (42)
The light emission of the stewardess call light (41) is controlled, or this data is supplied to the master controller (8) to collect statistics on audience ratings and the like.

In addition, control data SCz, SC2 from the control device (5) and master controller (8)
is the CAD^ encoder (6), (
7) and is multiplexed and supplied to the terminal device (30) on the receiving side. And this control data SCL, SC
2 controls the selection display device (35), and the terminal device (
The reception state of 30) is forcibly controlled to a constant state. For example, when override is turned on by the control device (5), the terminal device (30) is brought into a state of receiving video signals and audio signals output from the video tape recorder (1a) according to the control data SCx, and
The volume is also controlled at a constant level.

In addition, when the selection display device (35) is controlled by the control data S(d) when override is on or announcement is on, and the receiving state of the terminal device (30) is forcibly controlled to a constant state, unnecessary video signals, Audio signal sources (lb) to (ld), (4a).

(4b) and (37) are temporarily suspended. and,
When the reception control based on the control data SCs is released, the signal sources (1b) to (ld) are temporarily stopped.

The output operations of (4a), (4b), and (37) are restarted.

Therefore, the user of the terminal device (30) can view video and audio continuously as before the control, or play the game continuously as before the control.

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 (21
) to the terminal device (30) on the receiving side, and also to the CADA decoder (3) of the terminal device (30) on the receiving side.
Since the data from 6) is supplied to the transmitting side via the leaky cable (21), the apparatus can be simplified.

Further, according to this example, the audio signal is sent to the CAD^ encoder (6
).

Since the music is transmitted as a digital signal using the method 7), each terminal device (30) on the receiving side can listen to the music with good sound quality. Further, according to this example, the reception state of the terminal device (30) on the reception side is forcibly controlled to be constant by the control data SCz transmitted from the transmission side, and the reception state is forcibly controlled to be constant. When controlled, the output operation of unnecessary signal sources is stopped at 2 o'clock, and after the control is released, the temporary stop of the signal source is canceled, and video and audio can be viewed continuously as before the control. Therefore, it is possible to improve usability for the user.

In addition, apart from the above-mentioned embodiment, a master controller (8
) from the personal computer (37).

Control and terminal equipment to select the audio signal! ! (30)
It is also possible to forcibly notify the user of the terminal device (3o) of information such as the handling of the video and the content of the video. In this case, the data is recorded, for example, in a ROM (9a), and from this ROM (9a), the leaky cable (2
1) to the personal computer (37) of each terminal device (3o).

Furthermore, although the present invention is applied to an information transmission device in an aircraft in the above-described embodiment, it can be similarly applied to an information transmission device in a vehicle such as a train or a bus, or in a theater or stadium. Moreover, the above embodiment is a terminal device! (30) is provided on the back side of the seat, but it may also be placed near the seat, for example on the armrest, on a table attached to the seat, etc. Also, in the above embodiment, the selection display device (35 ) has been described so that all reception control is prohibited, but only some (particularly necessary portions) may be prohibited.

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

Since the audio signals and the like are frequency-multiplexed and transmitted by a single signal transmission means, the wiring becomes simple and the device can be simplified. Furthermore, since the reception state of the terminal device on the receiving side is forcibly controlled to be constant by the control data transmitted from the transmitting side, it is possible to improve usability. In addition, during reception control, the output operation of the signal source of unnecessary video signals and audio signals is temporarily stopped, and after the control is canceled, the signal source is released from the temporary stop.
The user on the receiving side can view and listen continuously, which improves usability. Hence the aircraft.

It is suitable for use as an information transmission device in vehicles such as trains and buses, theaters, and stadiums.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing one embodiment of the present invention, and FIGS. 2 and 3 are diagrams for explaining the same. (1a) to (1d) are video tape recorders, (2) is a television tuner, (3) is a still image player, (4a) and (4h) are audio players, <5) is a control device,
(6) and (7) are CADA encoders, (8) is a master controller, (9a) to (9h) are ROM,
(lla) to (l1g) are transformers, (12) is an adder, (13) and (32) are duplexers, (21) beam key cable, (30) is a terminal device, (31) is Antenna, (33) is TV tuner, (34) is CADA tuner, (35) is selection display device, (35p) is stewardess call key, (35q) is reading light key, (36
) is a CADA decoder, (37) is a personal computer, and (38) is a transmitter.

Claims (1)

[Scope of Claims] A transmitting device that multiplexes and transmits video signals from multiple video signal sources, audio signals from multiple audio signal sources, multiple computer software data, and control data; and output from this transmitting device. a signal transmission means for transmitting the multiplexed signal transmitted by the signal transmission means; a device for extracting the computer software data from the multiplexed signal transmitted by the signal transmission means; and a computer to which the computer software data extracted by the device is supplied. , a selection device for selectively extracting a plurality of video signals and audio signals extracted from the multiplexed signal, and a video signal and audio signal obtained from the computer, and a selection device for selectively extracting a desired video signal and audio signal from the multiplexed signal, and the control data from the multiplexed signal. , a video display device and an audio generator to which the selected video signal and audio signal are supplied, and the control data prohibits some or all of the selections by the selection device, , in an information transmission device consisting of a plurality of terminal devices from which an audio signal is forcibly selected, when one video signal or audio signal is forcibly selected by the terminal device, the other video signal or audio signal is When the output operation of the video signal source, audio signal source, and some or all of the computer to be output is temporarily stopped, and the forced selection based on the control data is canceled, the other video signal and audio signal are output. An information transmission device characterized in that output operations of the video signal source, audio signal source, and computer are restarted.