JPS63193683A - Information transmitter - Google Patents

Abstract

PURPOSE:To simplify an equipment and to improve operability by multiplexing plural video signals and voice signals and simultaneously transmitting it with a single transmission means, and displaying handling procedure or the like on the terminal equipment at a receiving side. CONSTITUTION:Video signals from video signal sources 1a-1d, 2, 3, voice signals from voice signal source 1a-1d, 4a, 4b, computer software data 9a-9h, and control data SC2 from a master controller 8 are inputted in parallel to CADA encoders 6, 7 via a controller 5, and subjected to dime-division multiplexing, then outputted in series. Resulting signals are transmitted through a modulator 11 and transmitted to a terminal equipment 30 through a leaky cable 21. Thus received video signal, voice signal, and software data are separated from each others by tuners 33, 34, and a decoder 36, selected by a selector 35, and respectively transmitted to a video displayer 35a, a voice generator 35c, and a computer 37.

Description

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

A. Field of industrial application B. Overview of the invention C. Prior art D. Problem to be solved by the invention E. Means for solving the problem (Fig. 1) F. Effect G. Embodiment G1 Explanation of transmitting side G2 Receiving side Description G3 Description of other embodiments H Effects of the invention A Industrial field of application The present invention is applicable to a video display device or an audio generation device that is individually provided in or near a passenger seat of an aircraft, train, bus, etc. The present invention relates to an information transmission device suitable for use in parallel transmission of a plurality of video signals, audio signals, etc.

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,
By multiplexing multiple video signals, audio signals, etc. and transmitting them using a single signal transmission means, and by forcibly displaying the handling information on the terminal device on the receiving side, the device is simplified. In addition, the purpose is to improve usability for users.

C. Prior Art For example, U.S. Pat. No. 4,584,603 shows the provision of separate video displays in passenger seats of 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 a plurality of video signal sources (1a) to (ld).

(2), video signals from (3), multiple audio signal sources (1a) to (ld), +21. (31, (4a)
, (4b) and a plurality of computer software data (9a) to (9h), and a signal transmission means (21) for transmitting the multiplexed signal output from the transmitting device. ), and separation devices (33), (34), (3) that separate video signals, audio signals, and computer software data from the multiplexed signal transmitted by this signal transmission means (21).
6) , this separation device (33) , (34) ,
A computer (37) to which the computer software data separated in (36) is supplied, a separation device (
A desired video signal from the video and audio signals from 33), (34), and (36) and the video and audio signals from the computer (37).

a selection device (35) for selecting an audio signal; a video display device (35) to which the selected video and audio signals are supplied;
5a) and a terminal device (30) having a voice generator (35c).

Then, the control data controls the computer (
The computer software data used in step 37) is related to the handling of the terminal device (30), and the selection device (35) is configured to select the video signal and audio signal from the computer (37). .

In this case, the control data is formed, for example, on the transmitting side, multiplexed with video signals, audio signals, etc., and transmitted to the terminal device (30), or is transmitted to the terminal device (30) by a key operation by the user of the terminal device (30). It is formed on the (30) side.

F. Effect In the above-described configuration, a plurality of video signals, audio signals, etc. are multiplexed by the transmitting device and supplied to the terminal device (30) on the receiving side via the signal transmission means (21).
In 30), desired video and audio signals can be viewed and viewed by selectively extracting desired video and audio signals using the selection device (35). In addition, in the above configuration, the computer (37) outputs video signals and audio signals related to the handling of the terminal device (30), etc. according to the control data, and the selection device (35) outputs the video signals and audio signals. is forcibly removed, so the terminal device (
30) is in a state where the video and audio based on the video signal and audio signal can be 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, (la) 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)
~(ld) is loaded with a cassette tape on which a movie is recorded. These video tape recorders (1a) to (
1d) is provided with a terminal (2) 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 (ld) are bilingual, terminals R and R are output terminals for the left audio signal and right audio signal in the language of the first country, respectively, and terminal A is the output terminal for the left audio signal and right audio signal in the language of the first country. This is an output terminal for a monaural audio signal in the language of the first or 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 volume 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 pause 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, and these output terminals V
In addition, R and A are equipped with a video tape recorder (1b).
), the video signal obtained at terminal V and the audio signal obtained at terminals R and A are output, but if the override key (
When pressing 5d) to turn on the override, the video signal obtained at terminal (3) and the 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, the microphone (5C) is connected to the output terminal A.
The audio signal from a) is output.

Further, (6) and (7) are CADA encoders used in a conventionally known cable single digital audio/data transmission system (CADA system).

A CADA system, for example, is a system that time-division multiplexes multiple digital audio signals and transmits them using the band (6MHz) of one vacant TV channel of CATν.
This is a system that can transmit music etc. extremely efficiently without sacrificing sound quality. CADA encoder (6) and (7)
is configured with an A/D converter and a shift register,
Time division multiplexing is performed by converting multiple audio signals into digital signals using an A/D converter, inputting them in parallel to predetermined positions of a shift register, and outputting them serially at high speed from this shift register. configured so that 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 output from the encoder +
61. Furthermore, the audio signals obtained at the output terminals R of the tuner (2) and the output terminal A of the still image player (3) are supplied to an encoder (6).

In addition, the audio signals obtained at 6 pairs of output terminals of the audio player (4a), 3 pairs of output terminals of R and the audio player (4b), and H are transmitted to the encoder (6) via the control device (5). ) and (7).

In addition, the override key of the control device (5)
(5d), announce key (5c), pause key (
When keys 5e) to 5g are pressed, the control device (5) generates control data SC1 corresponding to the pressed key, and this control data SC1 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 SC1, and the pause control signals obtained at these output terminals A to E cause the respective video tape recorders (1b )～(ld
), the audio players (4a) and (4b) are controlled. That is, the override key (5d) and the announce key (5d)
When c) is pressed, a pause control signal is output to the output terminals A-H, and the video tape recorders (1b) to (l
d) The audio players (4a) and (4b) are all in a pause state. Furthermore, when the Bose keys (5e) to (5g) are pressed, pause control signals are output to the output terminals A to C, respectively, and the video tape recorders (lb) to (1d
) are each put into a pause state.

Further, (8) is a master controller consisting of a computer that performs in-flight management, and this master controller (8) generates control data SC2 that controls the terminal device on the receiving side.
C2 is supplied to the encoder (6).

This control data SC2 is, for example, data that controls the brightness of the display device of the terminal device, data that requests data indicating the status of the terminal device, data that controls the terminal device to display information on how to handle the terminal device, etc. be.

Moreover, (9a) is data indicating the handling of the terminal device.

Data indicating the contents of the video signals from the video tape recorders (1b) to (ld), and an audio reproducing device (4a).

(4b) is a ROM in which so-called menu data, such as data indicating the content of the audio signal and data indicating the content of the game, is written, and (9b) to (9h) are ROMs in which different game data is written respectively. . This ROM (9
The computer software data SD read from a) to (9h) is supplied to the signal processing circuit (10),
After adding an error correction code, etc., the encoder (7
).

The control data SC1 and SC2 are also supplied from the encoder (6) to the encoder (7).

Further, the output terminal 0 of the encoder (6) is supplied with a signal 5C that is a digitally converted version of the supplied audio signals and a time-division multiplexed version of the control data SC1 and SC2.
AI is obtained and this signal 5CAI is sent to the modulator (llf)
and is AM modulated using the VSB (vestigial sideband) method. Further, at the output terminal 0 of the encoder (7), a signal 5CA2 obtained by time division multiplexing of the digitally converted plurality of supplied audio signals, control data SC1, SC2, and computer software data SD is obtained, This signal SCA2 is supplied to a modulator (l1g) and subjected to AM modulation using the VSB method.

Further, the video signal obtained at the output terminal V 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. Modulator (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 (11a) to (Ilg) 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. and,
The frequency-multiplexed signal SMF from the adder (12) is supplied via a duplexer (13) to one end of a key cable (leaky cable) (21) that constitutes 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 SMP leaking from the leaky cable (21). The frequency multiplexed signal SMp captured by this antenna (31) is supplied to a television tuner (33) and a CADA tuner (34) via a duplexer (32). The tuner (33) has modulators (lla) to (l
The tuner (34) is configured to be able to selectively receive channels in the output frequency band of the
lf) and (l1g) output frequency bands.
) and (34) are controlled by a selection display (35).

Further, the video signal and audio signal outputted from the tuner (33) are supplied to the selection display device (35), and the time division multiplexed signal 5CAI outputted from the tuner (34).
Alternatively, 5CA2 is supplied to the CADA decoder (36). The CADA decoder (36) is configured to operate almost inversely to the above-mentioned CAD^ encoders (61, (71), and receives control data SC1, SC2 from the time division multiplexed signal 5CAI or SCA2, and the selection display device (
35), desired audio signals and data for computer software are extracted. That is, the CADA decoder (36) is configured with a shift register and a D/A converter, and receives the time division multiplexed signal 5CA1 or 5CA2.
are serially input to a shift register, and control data SC1, SC2 is input from a predetermined position of this shift register.
are taken out in parallel, and a selection display device (35)
Desired audio signals and computer software data SD are taken out in parallel from predetermined positions of the shift register under the control of the shift register.

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 CADA decoder (
The computer software data SD 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 consisting of a flat cathode ray tube, liquid crystal display, etc., (35b) is an audio output terminal to which a hesodophone (35c) is connected, and (35d) is a joystick for games ( 35e) etc. (see FIG. 1) are connected to the game terminal.

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 (353) is a channel up key. In this case, the TV selection key (35f)
By pressing , then pressing the channel down key (35i) and channel up key (35j) in sequence, the television channels can be changed in sequence. That is, the TV tuner (33
) and the audio signal output from the CADA decoder (36) are changed, and the display device (35a
), screens of video signals output from video tape recorders (1b) to (ld), tuner (2), and still image player (3) are sequentially displayed, and the audio output terminal (
35b), a corresponding audio signal is output. here,
When there are audio signals 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 is output. Also, press the music selection key (35g), channel down key (35i), channel up key (35j)
The music channels can be changed in sequence by pressing . That is, the audio signal output from the CAD 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.

Further, (35k) is a menu display key, (3!M) is a cursor down key, (35m) is a cursor up key, and (35n) is an enter key. In this case, by pressing the menu display key (35k), a video signal based on data indicating the game content from the menu ROM (9a) is supplied from the personal computer (37) to the selection display device (35), and the display word fit (35a
) will display the menu screen. And cursor down key (351), cursor up key (35m)
By moving the cursor on the display screen to select a game and then pressing the enter key (3'5n), the game R selected from the personal computer (37) can be selected.
Video and audio signals based on the data from OM (9b) to (9h) are supplied to the selection display bag M (35), and the game screen is displayed on the display device (35a), as well as 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 polygon for adjusting the volume.

Also, the controller 1 taken out by the CADA decoder (36)
-1:l-)Ltchi7SC,,SC2&:, the selection display device (35) etc. are controlled by the CPU (not shown) in the CADA decoder (36). For example, when the override key (5d) of the control device W (5) on the transmitting side is pressed to turn on the override based on the control data SC1, the tuner (33) adjusts the output frequency band of the modulator (lla). The channel is in the receiving state, and the display device (35a) of the selection display device (35) displays an image of the video signal output to the output terminal V of the video tape recorder (1a), and the image of the video signal output to the audio output terminal (35b) is displayed. is a video tape recorder (1a)
The audio signal output to the output terminal A of the is obtained. Also, based on the control data SCz,
Announce key (5) on the transmitter control device (5)
When c) is pressed to turn on the announcement, the tuner (33) is in the reception state of the channel in the output frequency band of the modulator (lla), and the audio output terminal (35b) receives the signal from the microphone (5a). An audio signal is obtained. 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 SC1 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 playing a game 1. When controlled in this way, execution of the personal computer (37) is temporarily suspended.

In addition, the override key (5d) and the announce key (
When 5c) is pressed again to turn override off and announcement off, the above-mentioned control is canceled and the original state is automatically restored. In this case, the execution of the personal computer (37) is resumed, It is possible to continue playing the game. Also, when the reception status is forcibly controlled in this way, the channel indicator (35
h) indicates that the state 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) sends data indicating the state of the selection display bag fi (35) and data indicating the state of the seat belt, reclining, etc. detected by the sensor (39). generated. This data is supplied to the transmitter (38) and modulated to a frequency other than the output frequency band of the modulators (11a) to (l1g), and then sent to the duplexer (32) and the antenna (
31) to the leaky cable (21). Then, this data is transmitted from the leaky cable (21) to the CADA encoder (
6), and from this CADA encoder (6), it is supplied to the master controller (8) for use.

In addition, when the control data SC2 is for controlling to display the handling of the terminal device, etc., the CAD
The CPU in the A decoder (36) controls the personal computer (37) and the selection display device (35), and the menu ROM (9) is controlled by the personal computer (37).
Data indicating the handling of the terminal device from a), data indicating the content of the video signal from the video tape recorders (1b) to (ld), data indicating the content of the audio from the audio playback devices (4a) and (4b) , a video signal and an audio signal based on data indicating the content of the game, etc. are output. In the selection display device (35), these video signals and audio signals are selected and supplied to the display device (35a) and the audio output terminal (35b). That is, the display device (3
5a) displays the handling of the terminal device, the contents of the video signals from the video tape recorders (1b) to (1d), the contents of the audio signals from the audio players (4a) and (4b), the contents of the game, etc. At the same time, the audio output terminal (35
In b), a corresponding audio signal is output.

Although not described above, the control data SC2 for controlling the display of the handling of the terminal device, etc. in this manner is generated, for example, by a crew member's operation after the passenger is seated.

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. Based on this data, the CADA encoder (6)
Switch box (40) by PU (not shown)
is controlled and the corresponding stewardess call light (41)
is made to emit light. 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). Then, this data is sent to the duplexer (13) from the leaky cable (21).
is supplied to the CAD^ encoder (6) on the transmitting side.

Then, based on this data, a CADA encoder (6)
The switch box (40) is controlled by the CPU in the switch box (40), 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 CAD encoder (6), and from this CADA encoder (6) to the master controller (8). When this data is supplied, the word processor soft data is supplied from the master controller (8) to the CADA encoder (61, Tel), and the leaky cable (2) is supplied as a frequency multiplexed signal.
1) to the terminal device (30) side, and is taken into the personal computer (37). In this state, when the user operates the keyboard (43), texts, etc. are stored in the memory (RAM) of the personal computer (37).
) is recorded. In this case, the created text etc. are displayed on the display device (35a), and the user can modify the text etc. while looking at the display screen. When a termination operation is performed using the keyboard (43), data such as sentences (
ASCII code) is supplied to the transmitter (38) via the CAD decoder (36) and modulated, and then the demultiplexer (3
2) and the leaky cable (
21). Then, this data is supplied from the key cable (21) to the CADA encoder (6) via the duplexer (13), and the CADA encoder (
6) is supplied 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 (
1a) to (ld), tuner (2), still image player (
3) Video signals output from video tape recorders (1a) to (ld), tuner (2), still image playback device (3), and audio signals output from audio playback devices (4a) and (4b). The output signals of time-division multiplexed CADA encoders (61, (71) 5CAI, 5CA2
are modulated by modulators (lla) to (l1g), respectively, and added to form a frequency multiplexed signal SMF. This frequency multiplexed signal Ssp is transmitted through a leaky cable (21
) and transmitted to the receiving side. The terminal device (30) on the receiving side can select a desired one from among the plurality of video signals, audio signals, etc. transmitted as the frequency multiplexed signal SMP by controlling the selection display device (35).

Also, a reading light key (35q) from the terminal device (30).

Data indicating that the stewardess call key (35p) was pressed, data indicating the selection status of the selection display device (35), etc. are modulated by the transmitter (38) and then sent to the duplexer (32) and antenna (31). Leaky cable through (21)
supplied to This data is then supplied from the leaky cable (21) to the CADA encoder (6) via the duplexer (13). And this data is CAD^
The reading light (42) is supplied to the CPU in the encoder (6).
), the illumination of the stewardess call light (41) is controlled, or this data is sent to the master controller (8).
The data is supplied to the website, and statistics on audience ratings, etc. are collected.

In addition, when the control data SC2 is for controlling to display the handling of the terminal device, etc., the CAD
The CPU in the A decoder (36) controls the personal computer (37) and the selection display device (35), and the menu ROM (9) is controlled by the personal computer (37).
The video signal and audio signal based on the data indicating the handling of the terminal device from a) are output, and the selection display device (35
), these video signals and audio signals are selected and supplied to the display device (35a) and the audio output terminal (35b).

That is, the display device (35a) displays the handling of the terminal device, etc., and a corresponding audio signal is output to the audio output terminal (35b).

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 is also supplied to the CADA decoder (3o) of the terminal device (3o) 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 transmitted to the CADA encoder (6
).

(7), the music is transmitted as a digital signal, so each terminal device (30) on the receiving side can listen to music with good sound quality. In addition, the master controller (8
), the terminal device (30) is configured to forcibly display the handling of the terminal device, the content of the video signal, etc., so it is convenient for the terminal user, and There is also the benefit of not needing a pamphlet or the like showing how to handle the device (30).

G3 Description of Other Embodiments Next, other embodiments of the present invention will be described with reference to FIG. In FIG. 4, parts corresponding to those in FIG. 1 are designated by the same reference numerals, and detailed explanation thereof will be omitted.

In this example, in addition to the menu ROM (9a), the menu R
AM (9a') is arranged, and this menu RAM M (
9a') includes video tape recorders (lb) to (l
d) The content of the video signal from the audio player (4a),
Data that may be changed, such as data indicating the content of the audio signal from (4b), is written, and this data is multiplexed and transmitted to the terminal device (30) in the same way as the data in the menu ROM (9a). used. This menu RAM (9a') is controlled by the master controller (8), and is connected to the video tape recorders (1b) to (1d).
Contents of the video signal from the audio player (4a).

When the content of the audio signal from (4b) changes, the data is arbitrarily rewritten.

Further, in this example, a help key (51) is provided on the selection display device (35) of the terminal device (30).

By pressing this help key (5I), the terminal device (
30) is in a state where the handling of the terminal device, etc. is displayed on the display device (35a) in the same way as when the control data SC2 for controlling the display of the handling of the terminal device, etc. is transmitted from the transmitting side. Ru.

The rest of the structure is the same as the example shown in FIG.

In this way, in this example, in addition to being able to obtain the same effects as the example in Figure 1, a menu RAM (9a') is provided in addition to the menu ROM (9a), and data can be rewritten arbitrarily. Since there is a videotape recorder (
Even if the contents of the video signals from 1b) to 1d) change, this can be easily handled. Further, according to this example, a help key (51) is provided on the selection display device (35) of the terminal device (30), and even when this key is pressed, the handling of the terminal device, etc. is displayed on the display device (35a). Since it is forcibly displayed, the user of the terminal device (30) can:
Contents such as how to handle the terminal device can be viewed at will, which is very convenient for the user.

Although the above-mentioned embodiment applies 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. Further, in the above embodiment, the terminal device (30) is provided on the back side of the seat, but it may also be provided near the seat, for example, on the armrest, on a table attached to the seat, or the like.

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

Audio signals, etc. are multiplexed and transmitted using a single signal transmission means, and data from the receiving side is transmitted to the transmitting side via the single signal transmission means mentioned above, which simplifies wiring and makes the device easier to use. can be simplified. Therefore, it is suitable for application to information transmission devices in vehicles such as airplanes, trains, and buses, theaters, and B-technical halls. Further, according to the present invention, the content of the handling of the terminal device, etc. is forcibly displayed on the terminal device by control data transmitted from the transmitting side or formed by the terminal device on the receiving side. This eliminates the need for pamphlets etc. that show how to handle the terminal device, etc., and it is very convenient for the user of the terminal device to view the content such as how to use the terminal device at any time. be.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, FIGS. 2 and 3 are diagrams for explaining the same, and FIG. 4 is a block diagram showing another embodiment of the present invention. (1a) to (1d) are video tape recorders, (2) is a television tuner, (3) is a still image player, (4a) and (4b) are audio players, (5) is a control device,
(6) and (7) are CAD encoders, (8) is a master controller, (9a) to (9h) are ROM, (
lla) to (l1g) are modulators, (12) is an adder, (13) and (32) are duplexers, (21) is a leaky cable, (30) is a terminal device, (31) is an antenna, ( 33) is the TV tuner, (34) is the CA[lA tuner, (35) is the selection display device, (35p) is the stewardess call key, (35q) is the reading light key, (3
6) is a CADA decoder, (37) is a personal computer, (38) is a transmitter, and (51) is a help key.

Claims (1)

[Claims] A transmitting device that multiplexes and transmits video signals from a plurality of video signal sources, audio signals from a plurality of audio signal sources, and data for a plurality of computer software, and a multiplexer output from the transmitting device. a signal transmission means for transmitting a multiplexed signal; a separation device for separating the video signal, audio signal, and computer software data from the multiplexed signal transmitted by the signal transmission means; and the computer software separated by the separation device. a computer to which the data is supplied, a selection device for selecting a desired video signal and audio signal from the video signal and audio signal from the separation device, the video signal and audio signal from the computer, and the selected video signal and audio. In an information transmission device comprising a terminal device having a video display device and an audio generating device to which signals are supplied, the control data specifies that the data for the computer software used by the computer is related to the handling of the terminal device, etc. An information transmission device characterized in that the selection device is configured to select a video signal and an audio signal from the computer.