JPS63199584A - Information transmitter - Google Patents

Abstract

PURPOSE:To simplify an equipment and to improve the convenience of use at a terminal side, at the equipment transmitting plural signals from the plural VTRs of a transmitting side to a receiving side by transmitting the plural signals by multipliexing them and simultaneously displaying them on a terminal equipment when the VTR is not in an ordinary reproducing state. CONSTITUTION:The titled equipment is constituted of a transmitter comprised of CADA encoders 6, 7 and a modulator 11 by multiplexing and transmitting a video signal and a voice signal from the VTRs 1b-1d and a leakage cable 21, which transmits this multiplex signal, and selecting devices 33-36 which select the desired signal out of this multiplex signal and a terminal equipment 30 which has a video display device 35a to which the selected signal is supplied and a voice generating device 35c. Besides, a signal generator 57, which generates the video signal or the voice signal showing that the VTR is not in the ordinary reproducing state, is provided and when the VTR selected by the selecting devices 33-36 is not in the ordinary reproducing state, the signal from the signal generator 53 is supplied to the display devices 35a or 35c. Changeover switches 51-53, 54-56 are switched and connected according whether the VTR is in the ordinary reproducing state or not.

Description

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

Amm Field of application B Summary 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 the sending side G2 Description of the receiving side Explanation G3 Description of other embodiments H Effect of the invention A Industrial field of application The present invention is applicable to, for example, a video display device, a sound generation device, etc. 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 transmitting a plurality of video signals, audio signals, etc. in parallel.

B. Summary of the Invention The present invention provides an information transmission device that transmits a plurality of video signals and audio signals in parallel from a plurality of video tape recorders on the transmitting side to a receiving side. In addition to transmitting signals using a single signal transmission means, when the video tape recorder is not in a normal playback state such as when rewinding, a message to that effect is displayed on the terminal device, thereby simplifying the device. At the same time, it is intended to improve usability for terminal users.

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 something.

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

The present invention addresses this point and aims to simplify the device and improve usability for terminal users.

Means for Solving the R Problems The present invention provides a means for solving the R problem.
a transmitting device that multiplexes and transmits the video signal and audio signal from d), a signal transmitting means (21) that transmits the multiplexed signal output from this transmitting device, and this signal transmitting means
selection devices (33) to (36) for selecting a desired signal from the multiplexed signals transmitted by 21), this selection device (33);
A video display device (35a) and an audio generator (35c) to which the video signal and audio signal selected in ~(36) are supplied.
) and a terminal device (30). The present invention also provides a video tape recorder (11
3) A signal generator is provided to generate a video signal or an audio signal indicating that the terminals (ld) are not in the normal playback state, and the selection devices (33) to (36) of the terminal device (30)
) selected video tape recorders (1b) to (1d
) is not in the normal playback state, the video display device (35a)
Alternatively, a video signal or an audio signal from a signal generator is supplied to the audio generator (35c).

For example, the fa destination address is provided on the transmitting device side, and when the video tape recorders (1b) to (1d) are not in the normal playback state, the video signal or audio signal from the signal generator is transmitted to the signal transmission means (21). The signal is supplied to the video display device (35a) or the audio generator (35c) of the terminal device 2 (30) via the signal. For example, the signal generator is a terminal device (30)
video tape recorders (1b) to (ld)
) is not in the normal playback state, control data SC2 indicating this is supplied from the transmitter side to the terminal device (30) (Ill) via the signal transmission means (21), and based on this control data SC2, control data SC2 indicating this is supplied from the signal generator to The video signal or audio signal is supplied to the video display device (:15A) or the audio generator (35c) of the terminal device (30).

F Function In the above configuration, a plurality of video tape recorders (1
The video signals and audio signals from b) to (ld) are multiplexed and sent to the receiving terminal device (3) via the signal transmission means (21).
0), the terminal device (30) can view and listen to the desired video and audio by selectively extracting the desired video and audio signals using the selection devices (33) to (36). Further, in the above configuration, the selection devices (33) to
Video tape recorder (lb) selected in (36) ~
When (1d) is not in the normal playback state, such as when S urinates, for example, the video display bag of the terminal device (30); At this time, the video display device (35a) displays that the video tape recorder is not in the normal playback state.

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

It is commonly used for transmitting audio signals, etc.

G1 Description of the Transmitting Side In FIG. 1, (18) 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 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 monaural audio signals in the language of the second country. In addition, video tape recorders (lb) ~ (
1d) is an auto-rewind system, which detects the end of the magnetic tape or a control signal recorded on the tape, enters the rewind state from there, and enters the playback state after completing rewinding to the beginning of the magnetic tape. It is said to be configured to fit in.

The video signals obtained at the terminals V of these video tape recorders (1h) to (ltl) are connected to respective changeover switches (51).
~ (53) is supplied to the end f-N. In addition, the terminals I and IRI of the video tape recorders (1b) to (1d) are
The audio signals to be q are transmitted through the changeover switches (54) to (5
6) is supplied to terminal N. This changeover switch (54)
~(56) are of a three-circuit, two-contact structure. Further, (57) is a signal generator, and from this signal generator Wi (57), there is a message indicating that the video tape recorder is not in the normal playback state, such as [Please wait for a while. A video signal SV for displaying ", etc." and an audio signal SA for generating audio of the content are generated.

The video signal SV from this signal generator (57) is supplied to the glasses R of the changeover switches (51) to (53), and the audio signal S from this signal generator (57) It is supplied to terminals R of switches (54) to (56).

In addition, changeover switches (51) to (53), (54
) to (56) are respectively video tape recorders (1b) to
Switching is controlled by the signal from (1d) indicating whether or not it is in the normal playback state. That is, the changeover switches (51) to (5
3), (54) to (56) are switched and connected to the terminal N side when the video tape recorders (1b) to (1d) are in the normal playback state, respectively, and are connected to the terminal N side, respectively. ) are switched and connected to the terminal R side when they are not in the normal playback state, such as when rewinding or stopping, respectively.

Further, (2) is a television chainer, and this television chainer (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, and a so-called CF, which is a compact disc containing maps, airport guide maps, etc.
) It is designed to play 170M. This still image reproducing device (3) is provided with a terminal V to which a video signal for both still use is output and a terminal to which an audio signal is output.

Further, (4a) and (4h) are audio playback machines each equipped with 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 (1b) to (1d), respectively.
) is a pause key to put the cursor into a pause state. The video signal sent to the terminal V of the video tape recorder (1a), the audio signal sent to the terminals R and A, and the video signal obtained at the output side of the changeover switch (51), the changeover inch (54) The audio signals obtained at the output side of are respectively supplied to a control device (5).Control device (5)
has a video signal output terminal V and an audio signal output terminal,
R and A are provided, and these output terminals V and R,
, A, the video signal obtained at the output side of the changeover switch (51) and the audio signal obtained at the output side of the changeover switch (54) are outputted to the override key (5d).
) is pressed to turn on the override, the video signal 1= obtained at the terminal (3) and the audio signal obtained at the terminals R, A of the video tape recorder (1a) are output.

Furthermore, when the announce key (5c) is pressed to turn on the announcement, an audio signal from the microphone (5a) is output to the output terminal.

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

The CAD^ system, for example, is a system that time-division multiplexes multiple digital audio signals and transmits them using the band (6MHz) of one vacant CATV TV channel.
It is a system that can transmit music etc. extremely efficiently without sacrificing sound quality. CAD＾Encoder (6) and (7
) is configured with an A/D converter and a shift register, and converts a plurality of audio signals into digital signals with the A/D converter, and manually inputs the signals to predetermined positions of the shift register in parallel. It is configured to perform time division multiplexing by serially outputting from a register at high speed. 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). Furthermore, the audio signals obtained at the output sides of the changeover switches (55) and (56) are supplied to the encoder (6). Furthermore, output terminal 1 of chainer (2). , R and the audio signals obtained at the output terminal A of the still image player (3) are supplied to an encoder (6). In addition, there are six pairs of output terminals of the audio player (4a), three pairs of output terminals of R and the audio player (4h), and the audio signal obtained at R is sent 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, control data SC1 corresponding to the pressed key is generated from the second control device (5), and this control data SCz 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 SCt, and the pause control signals sent to these output terminals A to E cause the video tape recorder (lb ) ~(l
d) The audio players (4a) and (persimmon) are controlled.

That is, the override key (5d) and the announce key (
When 5c) is pressed, a pause control signal is output to output terminals A-E, and the Video Cheap Play! -da (1b)~
(Id), the audio playback devices (4a) and (4b) are all in a pause state. Also, pause keys (5e) to (5g)
When is pressed, pause control signals are output to output terminals A to C, respectively, and video tape recorders (lb) to (I
d) 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 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.

In addition, (9a) 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
O is supplied to a signal processing circuit (10), where an error correction code is added, etc., and then supplied to an encoder (7).

Further, the control data SCz and SC2 are also supplied from the encoder (6) to the encoder (7).

Furthermore, the output terminal O of the encoder (6) receives digitally converted signals of the plurality of supplied audio signals and a time-division multiplexed signal S of the control data SC1+SCx.
c^1 is obtained, and this signal Sc^1 is supplied to the modulator (111) where it is AM modulated using the VSB (vestigial sideband) method. A time-division multiplexed signal Sc82 of a plurality of digital audio signals, control data SCt + SC2, and combiator software data SD.
is obtained, and this signal Sc82 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. In the 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 the VS
AM modulated using the R method.

Also, the output side of the changeover switches (52) and (53).

Output terminal V of tuner (2) and still image player (3)
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 SNF leaking from the leaky cable (21). The frequency multiplexed signal SMF captured by this antenna (31) is supplied to a television tuner (33) and a CAD^chner (34) via a demultiplexer (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
The tuner (33) is configured to be able to selectively receive channels in the output frequency bands of lf) and (l1g).
The channel selection in (34) and (34) is performed using the selection display device (
35).

Further, the video signal and audio signal output from the tuner (33) are supplied to the selection display device (35), and the time division multiplexed signal Sc^1 output from the tuner (34)
Alternatively, SCA2 is supplied to the C^0^ decoder (36). The CAD decoder (36) is configured to operate almost in reverse to the above-mentioned encoder +6), (?), and outputs the time-sharing child car signal Sc formula 1 or Sc8).
The control data SC1, SC2, the desired audio signal under the control of the selection display device (35), and the data for computer software are extracted.
The A decoder (36) is configured with a shift register and a D/A converter, and receives the time division multiplexed signal Sc^1 or S
C8 is manually inputted in series to a shift register, and control data SCI is input from a predetermined position of this shift register.
, SC2 are taken out in parallel, and 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 selection display device (35).

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 CAD decoder (36) is supplied to a selection display device (35). Also, this C^mouth^ 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, 1&crystal display device, etc., (35b) is an audio output terminal to which headphones (35c) are 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, (35e) 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 (35j) in sequence, the television channels can be changed in sequence. That is, the reception channel at the TV tuner (33) and the C^DA decoder (3)
6) The audio signal output from the display device (3) is changed.
5a) includes video tape recorders (1h) to (ld
), tuner (2), and still image player (3), both sides of the video signals are sequentially displayed, and the corresponding audio signals are output to the audio output terminal (35b). Here, when there are audio signals in two languages, one video f1
Two channels are assigned to both sides of the two signals,
The first channel outputs an audio signal in the language of the first country, and the second channel outputs an audio signal in the language of the second country. Further, by pressing the music selection key (35g), the channel down key (35i), and the channel up key (35j) in sequence, the entertainment channel can be changed in sequence. That is, the audio No. 16 output from the CAD decoder (36) is changed and the audio signal output terminal (35
b) is an audio player (4a).

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

Also, (35k) is the menu display key, (351 is the cursor down key, (35m) is the cursor amplifier key,
(35n) is the enter key. In this case, each time the menu display key (35k) is pressed, 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.

Then, by moving the cursor on the display screen using the cursor down key (354') and the cursor amplifier key (35m) to select a game, and then pressing the enter key (35n), the selected game is selected from the personal computer (37). A display device (35) selects video and audio signals based on data from the ROMs (9b) to (9h).
Both sides of the game are displayed on the display device (35a), and a game audio signal is output to the audio output terminal (35b).

Further, in FIG. 2, (35p) is a stewardess call key, (35q) is a reading light key, and (35r) is a polyurethane for sounds ff1-J)14.

Also, based on the control data SCs and SCy extracted by the CAI'l^ decoder (36), the CAD
The selection display device (35) and the like are controlled by a CPU (not shown) in the eighth data header (36). For example, when the override key (5d) of the transmitting side control device (5) is pressed to turn on the override based on the control data SCr, the tuner (33)
is the reception state of the channel in the output frequency band of the modulator (lla), and the display device (35) of the selection display device (35)
In a), the video @! is output to the output terminal V of the video tape recorder (1a). An image of the signal is displayed, and an audio signal to be output to the output terminal of the video tape recorder (1a) is obtained at the audio output terminal (35b).

Based on the control data SC1, when the announce key (5c) of the transmitting side control device (5) is pressed to turn on the announcement, the tuner (3
3) is in the reception state of the channel in the output frequency band of modulation a (lla), and the audio output terminal (35b) is configured to receive an audio signal from the microphone (5a). In this case, the video signal is muted so that both sides are not displayed on the display device.

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

Furthermore, when the CAD encoder (6) or (7) does not function, the control data SCr 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. Ru.

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

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

When the announcement is turned off, the above-mentioned control is canceled and the original state is automatically restored. In this case, execution of the personal computer (37) is resumed so that the game can continue to be played. 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 CAD decoder (36) sends data indicating the status of the selected display device # (35), data indicating the status of the seat belt, reclining, etc. detected by the sensor (39). is generated. This data is supplied to the transmitter (38) and modulated to a frequency other than the output frequency band of the modulators (lla) to (fig), and then the duplexer (32) and the antenna (31).
) is supplied to the leaky cable (21). Then, this data is sent from the leaky cable (21) to the CAI (CAI) encoder (6) on the transmitting side via the duplexer (3).
) from this CADA encoder (6) to the master controller (8) for use.

Also, when the steward desk call key (35p) of the selection display device (35) is pressed, the CAD^ 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 C^encoder (6) on the transmitting side. and,
Based on this data, the C in the encoder (6) is sent to C60).
Switch box (40) by PU (not shown)
is controlled and the corresponding stewardess call light (4)
is made to emit light. In addition, a selection display device (35
)'s reading light key (35q) Press the key, CAD
A7': f-da (36) (7) Control data is generated by the CPU. This data is supplied to the transmitter (38) and modulated, and then sent to the duplexer (32) and the antenna (
31) to the key cable (21). Then, this data is sent from the leaky cable (21) to the CAD^encoder (
6).

Based on this data, a C/IOA encoder (6
The switch box (4o) is controlled by the CPU in ), and the corresponding reading light (42) is made to emit light.

Further, as shown by the broken line, when a keyboard (43) is connected to the game terminal (35d), control data is generated from c p tI of the CAD decoder (36). This data is supplied to the transmitter tJu (3B) and modulated, and then sent to the duplexer (32) and antenna (31).
is supplied to the leaky cable (21) via.

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 software data is supplied from the master controller (8) to the CAD^ encoders (6) and (7), and the frequency multiplier J'! ! The signal is supplied as a signal to the terminal device (30) via the leaky cable (21) and taken into the personal computer (37). In this state, when the user operates the keyboard (43), sentences etc. can be transferred to the personal combinator (37)
AM). In this case, the created text etc. are displayed on the display device (35a), and the user can perform f1 correction of the text etc. while looking at both sides of the display. When the end operation is performed using the keyboard (43), data such as text (ASCII code) is supplied from the memory of the personal computer (37) to the transmitter (38) via the CAD decoder (36). After being modulated, it is supplied to the leaky cable (21) via the duplexer (32) and antenna (31). Then, this data is transmitted from the key cable (21) to the CA via the duplexer (13).
It is supplied to a DA encoder (6), and from this CAD encoder (6) it is supplied to a 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. Further, the floppy disk or printed paper with the recorded information is received by the user when he or she gets off the airplane, for example.

This example is configured as described above, and the video tape recorder <
la) ~ (ld), tuner (2), still image player (
3) video signals output from video tape recorders (LA) to (LD), tuner +2), 7. The output signals Sc^1 of the CADA encoders (6) and (7) are time-division multiplexed with the audio signals output from the chill image playback device (3) and the audio playback devices (4a) and (4b). S.C.
^2 are respectively modulated by modulators (lla) to (l1g) and added to form a frequency multiplexed signal SMF. This frequency multiplexed signal SMF is transmitted to the leaky cable (21
) and transmitted to the receiving side. Then, the receiving side terminal device i! At (30), a desired one can be selected from a plurality of video signals, audio signals, etc. transmitted as the frequency multiplexed signal SMF by operating keys on the selection display device (35).

In this case, the TV selection key (3) of the selection display device (35)
5f) is pressed and the video tape recorders (1b) to (1
Assume that the video signal and audio signal from d) are selected. Video cheap play: l-da (1b) ~ (1d)
is in the normal playback state, the selector switch (51)
~(53), (54)~(56) are switched and connected to the terminal N side, so video tape recorders (1b)~(
The video and audio signals from 1d) are multiplexed and supplied to the terminal device (30) via the leaky cable (21). Also, video tape recorders (1b) to (1d)
is not in normal playback mode, such as when rewinding or stopping, selector switches (51) to (53), (54) to
(56) is switched and connected to the terminal R side, so instead of the video signal and audio signal from the video tape recorders (1b) to (1d), the video signal S is sent from the signal generation layer (57).
V and audio signal S^ are multiplexed and leaky cable (
21) to the terminal device (30). Therefore, when a video tape recorder in the normal playback state is selected by key operation on the selection display device (35), the video signal and audio signal from the video tape recorder are transmitted to the display device (35a) and the audio output terminal (35b).
and both sides are displayed based on the signal, and
Sound is generated. On the other hand, the selection display device (35
) When a video tape recorder that is not in the normal playback state is selected by key 1, the signal generator (57)
The video a signal and the audio signal from the display W, (35a
) and the audio output terminal (35b), for example, [Please wait for a while. Both sides of the content of "" are displayed, and the audio of the content is emitted.

In addition, data indicating that the terminal device rfl (30), color (Dilt light key (35q), steward desk call key (35p) has been pressed, data indicating the selection status of the selection display device (35), etc.) are sent to the transmitter (38). After being modulated by C, the data is supplied to the leaky cable (21) via the duplexer (32) and the antenna (31).Then, this data is sent from the leaky cable (21) to the C duplexer (13).
It is supplied to the AD^encoder (6). This data is then supplied to the Cr' LJ in the CAD encoder (6) and outputs the reading light (42) and the stewardess call light (4).
The light emission of 1) is controlled, or this data is supplied to the master controller (8) to collect audience rating statistics and the like.

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 C^0^ 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 transmitted through the CAnA 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. Further, according to this example, when the video tape recorders (1b) to (1d) selected by key operations on the selection display device (35) are not in the normal playback state, a message to that effect is displayed on the terminal device (30). Therefore, the user of the terminal device (30) can use the terminal device (30) with peace of mind and has the advantage of improved usability.

G] Description of other embodiments Next, FIG. 4 shows another embodiment of the present invention.
This is an example in which a video signal or the like indicating that the video tape recorder is not in the normal playback state is generated on the terminal device (30) side. 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 FIG. 1, a video tape recorder (1a) and (
The video signal and terminal obtained at the terminal (■) of lb).

The audio signals sent to R and A are respectively supplied to a control device (5). In this example, the output terminals V and R of this control device (5).

A is the terminal V of the normal video cheap player (1b).
A video signal input to terminal η and an audio signal input to terminal R, 8 are output.

Also, the output terminals of the video tape recorder (IC) and (LD) ■7. The audio signals obtained at R and A are encoded (
6), and is time-division multiplexed with other audio signals by this encoder (6).

Further, signals from the video tape recorders (1b) to (1d) indicating whether or not the video tape recorders are in the normal playback state are each supplied to the master controller (8). And this master two! The control data SC2 from the terminal 1-I-RA 1B) sends data indicating that the video tape recorder is not in the normal playback state, and the signal from the video tape recorder to the terminal device (3).
The data of the channel number selected at 0) is supplied to the encoders (6) and (71), and is time-division multiplexed with the audio signal and the like.

Further, the personal computer (37) of the receiving terminal device (30) generates a video signal or an audio signal with a message indicating that the video tape recorder is not in the normal playback state, for example, "Please wait for a while." A memory (ROM) in which data is written is provided.

And the CADA decoder (36) of the terminal device (30)
When the control data SC2 retrieved is data informing that the video tape recorder is not in the normal playback state, and the TV selection key (35f) of the selection display device (35) is pressed and a TV channel is selected. Sometimes, the CPU of the CAD decoder (36) selects the channel number indicated by the control data SC2 and the key operation of the selection display device (35).
ff is compared with the selected television channel number for non-match. If they do not match, no forced control is performed, but if they match, the execution of the selection display device (35) and the personal computer (37) is forcibly controlled by the CPU of the CAD decoder (36). That is,
When the above matches, the personal computer (37
), a video signal and an audio signal are generated to inform that the video tape recorder is not in the normal playback state. The video signal from this personal computer (37) is supplied to the display device (35a) of the selection display device (35), and the audio signal from this personal computer (37) is supplied to the selection display device 1.
The signal is supplied to the audio output terminal (35b) of i (35).

This example is constructed as described above, and the rest is the same as the example shown in FIG.

In the example shown in Fig. 4, the TV channel of the video cheap player, which is not in the normal playback state due to rewinding, stopping, etc., is selected by key operation of the selection display bag 'FR (35). Sometimes C of CAD＾Deni 1-da (36)
The execution of the selection display device (35) and the personal computer (37) is forcibly controlled by the PU, and the personal computer (37) outputs a video signal and an audio signal that inform that the video tape recorder is not in the normal playback state. is generated and supplied to the display device (35a) and audio output terminal (35b) of the selection display device (35), respectively. Then, for example, both sides of the content ``Please wait for a while.'' are displayed and the audio corresponding to the content is generated.

In this way, the selection display device (35
) key operation selects the videotape recorder (
When 1b) to 1d are not in the normal playback state, a message to that effect is displayed on the terminal device (30), so that the same effects as in the example in FIG. 1 can be obtained.

In the above-mentioned embodiment, an example was described in which a screen informing that the video tape recorder is not in the normal playback state is displayed and at the same time the sound of the content is generated, but double-sided display or Only one of the voice generation may be performed. Furthermore, in the above embodiments, when the video tape recorder is not in the normal playback state, the screen with the same content is always displayed or the same sound is generated.
The content of the screen display or sound generation may be changed depending on the cause of the "normal reproduction normal biological state". In that case, in the example of FIG.
) to (1d), a control signal according to the cause is sent to the signal generator (
57), and the contents of the video signal and audio jfg signal from the signal generator (57) are switched depending on the cause. In the example shown in FIG. 4, the control data SC2 from the master controller (8) also has cause data based on control signals corresponding to the causes from the video tape recorders (1b) to (1d). The contents of the video signal and audio signal generated by the personal computer (37) are changed depending on the cause.

For example, when rewinding, the content is "Rewinding the tape. Please wait for a while." When stopping, the message is "
This channel is currently not broadcasting.''

Furthermore, although the present invention is applied to an information transmission device inside an aircraft in the above-described embodiment, 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.

11 Effects of the Invention According to the present invention described above, the video signals and audio signals from a plurality of video tape recorders are multiplexed and transmitted by a single signal transmission means, which simplifies the wiring and simplifies the device. It is possible to aim for Furthermore, when the video tape recorder is not in the normal playback state, such as when rewinding, a message to that effect is displayed on the terminal device, thereby improving usability for the terminal user. Therefore, it is suitable for use as an information transmission device in vehicles such as airplanes, trains, buses, theaters, etc.

[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. (la) - (ld) are video cheap re = 1 - da, (2
) is a TV tuner, (3) is a still image player, (4a
) and (4b) are audio playback devices, (5) are control devices, (6) and (7) are CAD encoders, (8)
is the master controller, (9a) to (91+) are l
guOM, (ll&) ~ (l1g) is a transformer,
(12) is an adder, (13) and (32) are demultiplexers, (
21) Beam-key cable, (30) terminal device, (3
1) is the antenna, (33) is the TV tuner, (34)
(35) is the selection display device, (35)
p) is the stewardess call key, (35q) is the reading light key, (36) is the CAD decoder, (37) is the personal:I ambiator, (38) is the transmitter, (51) ~
(56) is a changeover switch, and (57) is a signal generator.

Claims (1)

[Claims] 1. A transmitting device that multiplexes and transmits video and audio signals from a plurality of video tape recorders, a signal transmission means that transmits the multiplexed signal output from the transmitting device, and this signal. It consists of a selection device for selecting a desired signal from multiplexed signals transmitted by a transmission means, and a terminal device having a video display device and an audio generation device to which the video and audio signals selected by the selection device are supplied. The information transmission device is provided with a signal generator that generates a video signal or an audio signal indicating that the video tape recorder is not in a normal playback state, and the video tape recorder selected by the selection device of the terminal device is An information transmission device characterized in that, when not in a normal playback state, a video signal or an audio signal from the signal generator is supplied to the video display device or the audio generator. 2. The signal generator is provided on the transmitting device side, and when the video tape recorder is not in a normal playback state, the video signal or audio signal from the signal generator is transmitted to the terminal device via the signal transmission means. The information transmission device according to claim 1, characterized in that the information transmission device is supplied to a video display device or an audio generation device. 3. The signal generator is provided on the terminal device side, and when the video tape recorder is not in a normal playback state, control data indicating this is transmitted from the transmitting device side to the terminal device side via the signal transmission means. Information according to claim 1, characterized in that the video signal or the audio signal from the signal generator is supplied to the video display device or the audio generator of the terminal device based on the control data. Transmission device.