JP2002044029A - Indoor talking system and indoor talking terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep the secrete of talking contents and raise the degree of freedom of the location or the direction of an indoor talking terminal. SOLUTION: An infrared radiator 36 at the indoor talking terminal 30 is composed of a plurality of infrared radiator elements mounted with their direction axes shifted by at direction angles, an infrared photoreceiver 38 at the terminal is composed of a plurality of infrared photoreceiver elements mounted with their direction axes shifted lengthwise and crosswise by at direction angles, and each is mounted on the top of a headphone 34. A controller 60 has an infrared radiator 66 and an infrared photoreceiver 68 at the terminal. The radiator 66 is composed of a plurality of infrared radiator elements mounted with their direction axes shifted lengthwise and crosswise by at direction angles, the infrared photoreceiver 68 is composed of a plurality of infrared photoreceiver elements mounted with their direction axes shifted lengthwise and crosswise by at direction angles, and each is mounted on the ceiling of a talking room 10. Infrared rays are used and the talking content never leaks. The direction angle is substantially wide enough to raise the degree of freedom of the location or direction of the terminal 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor communication system and an indoor communication terminal used therein, and more particularly, to a portable indoor communication terminal and a management device for managing indoor communication. The present invention relates to an indoor conversation system and an indoor conversation terminal used in the system.

[0002]

2. Description of the Related Art Hitherto, as this type of indoor conversation system, a system in which voice signals from an indoor conversation terminal and a management device are transmitted and received using radio waves has been proposed. In this device, the indoor conversation terminal transmits a terminal microphone, a terminal transmitter that transmits an audio signal input from the terminal microphone as a radio wave of a predetermined frequency as a carrier, and transmits a radio wave of a predetermined frequency as a carrier. A terminal receiver capable of receiving the audio signal, and a headphone-type speaker that outputs an audio signal received by the terminal receiver,
The management device is a device receiver capable of receiving an audio signal transmitted from the terminal transmitter of the indoor conversation terminal, a speaker that outputs the audio signal received by the device receiver, and a device microphone. A device transmitter for transmitting an audio signal input from the device microphone as a carrier wave of a predetermined frequency.

[0003]

However, in such an indoor conversation system that transmits and receives a voice signal using a radio wave as a carrier, it is difficult to keep the conversation contents secret. The radio waves are reflected by walls forming the inside and outside of the room, but a part thereof is radiated to the outside as leaked radio waves. By receiving this leaked radio wave, the conversation contents are leaked. On the other hand, in order to prevent leaked radio waves, it is conceivable to form the walls forming the inside and outside of the room with a material having a high radio wave blocking effect, but in this case, the cost of forming the walls is increased.

[0004] It is an object of the indoor conversation system of the present invention and the indoor conversation terminal used therefor to maintain the secrecy of the conversation contents. Another object of the indoor communication system of the present invention and the indoor communication terminal used for the same are to increase the degree of freedom of the indoor position and the direction of the indoor communication terminal.

[0005]

Means for Solving the Problems and Their Functions and Effects The indoor conversation system according to the present invention and the indoor conversation terminal used therein employ the following means in order to achieve at least a part of the above object.

A first indoor conversation system according to the present invention is an indoor conversation system comprising at least one portable indoor conversation terminal and a management device for managing indoor conversation.
The indoor conversation terminal includes a terminal-side voice receiving unit that receives voice and converts it into a voice signal, and a terminal that generates a voice high-frequency signal by frequency-modulating a high-frequency signal with a voice signal from the terminal-side voice receiving unit. Frequency modulating means, comprising a terminal-side infrared radiating means for converting an audio high-frequency signal generated by the frequency modulation into infrared radiation and radiating the infrared radiation;
The gist includes a device-side infrared light receiving unit that is installed at a predetermined position in a room and can receive infrared rays, and a device-side demodulation unit that demodulates the received infrared rays into an audio signal.

In the first indoor conversation system according to the present invention, the transmission of the audio signal from the indoor conversation terminal to the management device is performed using infrared rays, so that the sound signal is transmitted through the walls forming the inside and outside of the room. No leakage to the outside. As a result, confidentiality of the conversation contents can be maintained.

In the first indoor conversation system of the present invention, the terminal-side infrared radiating means includes a plurality of infrared radiating elements having a predetermined directional angle for each predetermined angle within the range of the predetermined directional angle. It can be. In this way, the directivity angle of the indoor communication terminal for infrared radiation can be substantially increased, so that the degree of freedom of the indoor position and the direction of the indoor communication terminal can be increased.

In the first indoor conversation system of the present invention, the device-side infrared light receiving means includes a plurality of infrared light receiving elements having a predetermined directional angle for each predetermined angle within a range of the predetermined directional angle. May be used. This makes it possible to substantially increase the directivity angle of the management device in receiving infrared light, so that the degree of freedom in the indoor position and the direction of the indoor communication terminal can be increased.

Further, in the first indoor communication system of the present invention, the indoor communication terminal includes a terminal-side infrared light receiving means capable of receiving infrared light, a terminal-side demodulation means for demodulating the received infrared light into an audio signal, and A terminal-side audio output unit for outputting a demodulated audio signal as audio, wherein the management device receives the audio and converts the audio signal into an audio signal; Device-side frequency modulating means for generating a voice high-frequency signal by performing frequency modulation by the apparatus, and device-side infrared radiation which is installed at a predetermined position in a room and converts the voice high-frequency signal generated by the device-side frequency modulating device into infrared radiation and radiates Means may be provided. In this case, the audio signal can be transmitted and received bidirectionally using infrared rays.

In the first indoor communication system of the present invention capable of bidirectional transmission and reception, the terminal-side infrared light receiving means includes an infrared light receiving element having a predetermined directional angle for every predetermined angle within a range of the predetermined directional angle. May be provided as a plurality of means. This makes it possible to substantially increase the directivity angle of the indoor communication terminal in receiving infrared light.
The degree of freedom in the indoor position and the direction of the indoor conversation terminal can be increased.

Further, in the first indoor communication system of the present invention capable of bidirectional transmission / reception, the apparatus-side infrared radiating means includes an infrared radiating element having a predetermined directional angle having a predetermined angle within a range of the predetermined directional angle. A plurality of means may be provided for each. By doing so, the directivity angle of the management device for infrared radiation can be substantially widened, so that the degree of freedom in the indoor position and the direction of the indoor conversation terminal can be increased.

[0013] A second indoor conversation system according to the present invention is an indoor conversation system comprising at least one portable indoor conversation terminal and a management device for managing indoor conversation.
The indoor conversation terminal includes a terminal-side infrared light receiving means capable of receiving infrared light, a terminal-side demodulation means for demodulating the received infrared light into an audio signal, and a terminal-side audio output means for outputting the demodulated audio signal as audio. The management device includes a device-side voice receiving unit that receives a voice and converts it into a voice signal, and generates a voice high-frequency signal by frequency-modulating a high-frequency signal with a voice signal from the device-side voice receiving unit. The gist comprises a device-side frequency modulating unit and a device-side infrared radiating unit that is installed at a predetermined position in a room and converts an audio high-frequency signal generated by the device-side frequency modulating unit into infrared rays and radiates the infrared rays.

In the second indoor conversation system according to the present invention, the transmission of the audio signal from the management device to the indoor conversation terminal is performed using infrared rays, so that the sound signal is transmitted through the walls forming the inside and outside of the room. No leakage to the outside. As a result, confidentiality of the conversation contents can be maintained.

In the second indoor conversation system according to the present invention, the terminal-side infrared light receiving means includes a plurality of infrared light receiving elements having a predetermined directional angle for each predetermined angle within the range of the predetermined directional angle. It can be. This makes it possible to substantially widen the directivity angle of the indoor communication terminal in receiving infrared light, so that the degree of freedom of the indoor position and the direction of the indoor communication terminal can be increased.

In the second indoor conversation system of the present invention, the device-side infrared radiating means includes a plurality of infrared radiating elements having a predetermined directional angle for each predetermined angle within the range of the predetermined directional angle. May be used. By doing so, the directivity angle of the management device for infrared radiation can be substantially widened, so that the degree of freedom in the indoor position and the direction of the indoor conversation terminal can be increased.

A first indoor conversation terminal according to the present invention is an indoor conversation terminal capable of constituting an indoor conversation system, comprising: a voice receiving means for receiving a voice and converting it into a voice signal; A frequency modulation means for frequency-modulating an audio signal from a receiving means to generate an audio high-frequency signal, and an infrared radiation means for converting the audio high-frequency signal generated by the frequency modulation into infrared radiation and emitting the infrared signal And

In the first indoor conversation terminal of the present invention, the transmission of the voice signal from the indoor conversation terminal can be performed using infrared rays. Since infrared rays do not leak through the walls forming the inside and outside of the room and leak to the outside, confidentiality of conversation contents can be achieved.

In the first indoor conversation terminal of the present invention, the infrared radiating means includes a plurality of infrared radiating elements having a predetermined directional angle for each predetermined angle within the range of the predetermined directional angle. It can also be. This way,
Since the directivity angle of the infrared radiation can be substantially widened, the audio signal can be more reliably transmitted to the receiver.

Further, in the first indoor communication terminal of the present invention, infrared receiving means capable of receiving infrared light, demodulating means for demodulating the received infrared light into a voice signal, and outputting the demodulated voice signal as voice. And an audio output unit that performs the operation. In this way, the audio signal can be bidirectionally transmitted and received using infrared rays. In the first indoor conversation terminal of the present invention of this aspect, the infrared light receiving means is a means provided with a plurality of infrared light receiving elements having a predetermined directivity angle for each predetermined angle within a range of the predetermined directivity angle. You can also. This makes it possible to substantially widen the directional angle in infrared light reception, so that a sound signal can be received more reliably.

The first aspect of the present invention capable of such bidirectional transmission and reception.
In the indoor conversation terminal, the voice output means may be a headphone type means, and the infrared radiation means and the infrared light reception means may be arranged on a head of the voice output means.

A second indoor communication terminal according to the present invention is an indoor communication terminal capable of forming an indoor communication system, comprising infrared receiving means capable of receiving infrared light, and demodulating the received infrared light into a voice signal. The present invention comprises a demodulation unit for performing the demodulation and an audio output unit for outputting the demodulated audio signal as audio.

The second indoor conversation terminal of the present invention can receive a voice signal transmitted using infrared rays. Since infrared rays do not leak through the walls forming the inside and outside of the room and leak to the outside, confidentiality of conversation contents can be achieved.

[0024] In the second indoor conversation terminal of the present invention, the infrared light receiving means includes a plurality of infrared light receiving elements having a predetermined directional angle for each predetermined angle within the range of the predetermined directional angle. It can also be. This makes it possible to substantially widen the directional angle in infrared light reception, so that a sound signal can be received more reliably.

[0025]

Next, embodiments of the present invention will be described with reference to examples. FIG. 1 is a configuration diagram schematically illustrating the configuration of an indoor conversation system 20 according to an embodiment of the present invention. As shown in the drawing, the indoor conversation system 20 of the embodiment includes an indoor conversation terminal 30 movable in the conversation room 10 and a management device 6 installed in a management room 12 different from the conversation room 10.
0.

The indoor conversation terminal 30 includes a microphone 32 attached to a headphone 34 and a terminal-side infrared radiating unit 3 attached near the top of the headphone 34.
6, a terminal-side transmitter 40 having a headphone 34 and a terminal-side receiver 50 having a terminal-side infrared receiver 38 attached near the top of the headphone 34;
It is configured as a mobile terminal capable of transmitting and receiving voice signals by infrared communication.

FIG. 2 is a configuration diagram schematically illustrating the configuration of the terminal-side transmission unit 40 of the indoor conversation terminal 30. As illustrated, the terminal-side transmitting unit 40 of the indoor conversation terminal 30 includes a microphone 32, an audio signal amplifying circuit 42 for amplifying an audio signal input from the microphone 32, a high-frequency signal generation circuit 44, and a high-frequency signal generation circuit. A frequency modulation circuit 46 for frequency-modulating a high-frequency signal from 44 with an audio signal amplified by the audio signal amplification circuit 42, and a terminal-side infrared radiation for converting the high-frequency signal frequency-modulated by the frequency modulation circuit 46 to infrared and radiating the same And a unit 36. As illustrated in FIG. 3, the terminal-side infrared radiating unit 36 includes N infrared radiating elements 3 that radiate infrared rays at a directional angle θ1.
7 is attached with the directional axis shifted by an angle α1 substantially the same as the directional angle θ1. Therefore, the substantial directivity angle of the infrared radiation radiated from the terminal-side infrared radiation section 36 is substantially N
× θ1, and infrared rays can be radiated over a wide range even if the speaker carrying the indoor speaker terminal 30 moves in the speaker chamber 10.

FIG. 4 is a configuration diagram exemplifying the outline of the configuration of the terminal-side receiving unit 50 of the indoor conversation terminal 30. As shown, the terminal-side receiving unit 50 of the indoor conversation terminal 30 includes a terminal-side infrared receiving unit 3 that receives infrared rays and converts them into a high-frequency signal.
8, a high-frequency amplifier circuit 52 for amplifying a high-frequency signal from the terminal-side infrared light receiving unit 38, an audio demodulation circuit 54 for demodulating an audio signal by frequency discrimination of the amplified high-frequency signal,
The audio signal amplification circuit 56 amplifies the audio signal from the audio demodulation circuit 54, and the headphone 34 outputs the audio signal from the audio signal amplification circuit 56 as audio. As illustrated in FIG. 5, the terminal-side infrared light receiving unit 38 includes L × J infrared light receiving elements 39 that receive infrared light at a directional angle γ1.
Are mounted so that the directivity axis is shifted vertically and horizontally at an angle φ1 substantially equal to the directivity angle γ1. Accordingly, the directional angle of the terminal-side infrared light receiving unit 38 with respect to infrared light reception is L in the horizontal direction.
× γ1 and J × γ1 in the vertical direction. Even if the speaker carrying the indoor speaker terminal 30 moves in the speaker room 10, infrared rays can be received in a wide range.

The management device 60 is a management console 14 of the management room 12.
62 and the conversation room 10 attached to the
A device-side transmitter 70 having a device-side infrared radiator 66 attached to the ceiling of the device and connected by a transmission line L1;
An indoor communication terminal including a speaker 63 and headphones 64 attached to the management console 14 and a device-side receiver 80 having a device-side infrared receiver 68 attached to the ceiling of the conversation room 10 and connected by a reception line L2. 30 is configured as a management device capable of transmitting and receiving a voice signal by infrared communication.

FIG. 6 shows the device-side transmission unit 70 of the management device 60.
1 is a configuration diagram illustrating an outline of the configuration of FIG. As illustrated, the device-side transmission unit 70 of the management device 60 includes a microphone 62, an audio signal amplification circuit 72 that amplifies an audio signal input from the microphone 62, and a high-frequency signal generation circuit 7.
4, a frequency modulation circuit 76 for frequency-modulating the high-frequency signal from the high-frequency signal generation circuit 74 with the audio signal amplified by the audio signal amplification circuit 72, and converting the high-frequency signal frequency-modulated by the frequency modulation circuit 76 into infrared light. And a device-side infrared radiation section 66 that radiates downward from the ceiling of the conversation room 10. The device-side infrared radiation section 66 is shown in FIG.
As shown in the example, k × j infrared radiating elements 67 that emit infrared rays at a directional angle θ2 from the ceiling of the conversation room 10 downward at a directional angle θ2 have a directional axis at every angle α2 substantially equal to the directional angle θ2. It is attached vertically and horizontally. Therefore,
The substantial directivity angles of the infrared rays radiated from the device-side infrared radiating section 66 are k × θ2 in the horizontal direction and j × θ2 in the vertical direction. Even when moving inside, the infrared light can be emitted to the indoor communication terminal 30.

FIG. 8 shows the device-side receiving unit 80 of the management device 60.
1 is a configuration diagram illustrating an outline of the configuration of FIG. As shown in the figure, the device-side receiving unit 80 of the management device 60 includes a device-side infrared receiving unit 68 that receives infrared rays and converts them into a high-frequency signal, and a high-frequency signal from the device-side infrared receiving unit 68 is sound-signaled by frequency discrimination. Demodulation circuit 82 for demodulating the audio signal, and an audio signal amplification circuit 84 for amplifying the audio signal from the audio demodulation circuit 82
And a speaker 63 and a headphone 64 for outputting a sound signal from the sound signal amplifying circuit 84 as sound. As illustrated in FIG. 9, the device-side infrared light receiving unit 68 shifts the directional axes of the M infrared light receiving elements 69 that receive infrared light at the directional angle γ2 at an angle φ2 substantially equal to the directional angle γ2. Installed. Therefore, the directivity angle of the device-side infrared light receiving section 68 with respect to infrared light reception is M × γ2, and even when a speaker carrying the indoor talk terminal 30 moves in the talk room 10, infrared light is received in a wide range. can do.

The indoor conversation system 2 of the embodiment described above
According to 0, transmission and reception between the indoor conversation terminal 30 and the management device 60 can be performed using infrared rays. Even if the wall of the communication room 10 is formed of a normal material, infrared rays
, The contents of the conversation can be kept confidential. Of course, since transmission and reception are performed by infrared rays, there is no need to connect the indoor conversation terminal 30 and the management device 60 by wire, and the degree of freedom of movement of the speaker carrying the indoor conversation terminal 30 can be increased.

According to the indoor communication terminal 30 used in the indoor communication system 20 of the embodiment, the terminal-side infrared radiating portion 36 in which the N infrared radiating elements 37 are attached with the directional axis shifted by the directional angle θ1 is attached. By using the terminal-side infrared light receiving unit 38 in which the L × J infrared light receiving elements 39 are shifted in the vertical and horizontal directions by the directivity angle γ1 and the L × J infrared light receiving elements 39 are used, The degree of freedom in position and direction can be increased.

According to the management device 60 used in the indoor conversation system 20 of the embodiment, the device-side infrared radiating section in which the k × j infrared radiating elements 67 are attached with the directional axis shifted vertically and horizontally by the directional angle θ2. By using the device-side infrared light receiving section 68 in which the M-shaped infrared light receiving elements 69 are displaced from the directivity axis by the directivity angle γ2, the position of the talker carrying the indoor talk terminal 30 and The degree of freedom in the direction can be increased.

In the indoor conversation system 20 of the embodiment, one indoor conversation terminal 30 and one management device 60 are used, but a plurality of indoor conversation terminals 30 and one management device 60 are used.
And may be configured by: In this case, the infrared frequency band may be divided and assigned to the plurality of indoor conversation terminals 30 or may be assigned by time division.

In the indoor conversation terminal 30 used in the indoor conversation system 20 of the embodiment, the terminal-side infrared radiation section 36 is constituted by N infrared radiation elements 37, but the number of infrared radiation elements 37 is one or more. Any number is acceptable. Further, in the indoor conversation terminal 30 of the embodiment, the N infrared radiating elements 37 are mounted with the directional axes shifted by an angle α1 that is substantially the same as the directional angle θ1, but the angle is within the range of the directional angle θ1. Any suitable angle may be used to shift the directional axis for attachment.

In the indoor communication terminal 30 used in the indoor communication system 20 of the embodiment, the terminal-side infrared light receiving section 38 is constituted by L × J infrared light receiving elements 39, but the number of infrared light receiving elements 39 is one. Any number is acceptable as long as it is above. In the indoor conversation terminal 30 of the embodiment, L × J
The number of infrared receiving elements 39 is set to an angle φ substantially equal to the directivity angle γ1.
The directional axis is shifted vertically and horizontally by one, but the directional angle γ
Any angle within the range of 1 may be used to shift the directional axis vertically and horizontally using any angle.

In the management apparatus 60 used in the indoor conversation system 20 of the embodiment, the apparatus-side infrared radiating section 66 is constituted by k × j infrared radiating elements 67, but the number of infrared radiating elements 67 is one or more. Any number is acceptable. Also, in the management device 60 of the embodiment, the k × j infrared radiation elements 67 are mounted by shifting the directional axes vertically and horizontally by an angle α2 substantially the same as the directional angle θ2, but the angle within the range of the directional angle θ2 is set. If so, the directional axis may be shifted vertically and horizontally using any angle.

In the management device 60 used in the indoor conversation system 20 of the embodiment, the device-side infrared light receiving section 68 is constituted by M infrared light receiving devices 69.
May be any number as long as it is one or more.
Further, in the management device 60 of the embodiment, the M infrared light receiving elements 69 are mounted with the directional axes shifted by an angle φ2 substantially the same as the directional angle γ2, but any angle within the range of the directional angle γ2 can be used. The directional axis may be shifted using the angle.

The indoor communication terminal 30 used in the indoor communication system 20 of the embodiment includes the terminal-side transmitting section 40 and the terminal-side receiving section 50. It is also possible to provide only the terminal-side transmitting unit 40 without including the terminal-side transmitting unit 40, or to provide only the terminal-side transmitting unit 50 without including the terminal-side transmitting unit 40. In this case, the management device 60 may include the device-side transmitting unit 70 and the device-side receiving unit 80, or may include the device-side transmitting unit 70.
May be provided without the device-side receiving unit 80, or may be provided with only the device-side transmitting unit 70 without the device-side receiving unit 80.

The embodiments of the present invention have been described with reference to the embodiments. However, the present invention is not limited to these embodiments, and various embodiments may be made without departing from the scope of the present invention. Of course, it can be carried out.

[Brief description of the drawings]

FIG. 1 is an indoor communication system 2 according to an embodiment of the present invention.
FIG. 2 is a configuration diagram schematically illustrating a configuration of a zero.

FIG. 2 is a configuration diagram illustrating the outline of the configuration of a terminal-side transmission unit 40 of the indoor conversation terminal 30;

FIG. 3 is an explanatory diagram illustrating a state in which infrared light is emitted from a terminal-side infrared radiation section;

FIG. 4 is a configuration diagram illustrating an outline of a configuration of a terminal-side receiving unit 50 of the indoor conversation terminal 30;

FIG. 5 is an explanatory diagram illustrating a state in which a terminal-side infrared light receiving unit receives infrared light.

FIG. 6 is a configuration diagram exemplifying an outline of a configuration of a device-side transmission unit 70 of the management device 60.

FIG. 7 is an explanatory diagram illustrating a state in which infrared rays are emitted from a device-side infrared radiation section 66;

FIG. 8 is a configuration diagram exemplifying an outline of a configuration of a device-side receiving unit 80 of the management device 60.

FIG. 9 is an explanatory diagram illustrating a state in which infrared light is received by a device-side infrared light receiving unit 68;

[Explanation of symbols]

10 communication rooms, 12 control rooms, 14 control consoles, 20 indoor communication systems, 30 indoor communication terminals, 32 microphones, 34 headphones, 36 terminal-side infrared radiation parts, 37 terminal-side infrared radiation elements, 38 terminal-side infrared light-receiving parts, 39 infrared light receiving element, 40 terminal side transmission section, 42
Audio signal amplification circuit, 44 High frequency signal generation circuit, 46
Frequency modulation circuit, 50 terminal side receiving section, 52 high frequency amplification circuit, 54 audio demodulation circuit, 56 audio signal amplification circuit, 60 management device, 62 microphone, 63 speaker, 64 headphone, 66 device side infrared radiation section, 67 infrared radiation element , 68 device-side infrared light receiving unit, 69 device-side infrared light receiving element, 70 device-side transmitting unit, 72
Audio signal amplification circuit, 74 High frequency signal generation circuit, 76
Frequency modulation circuit, 80 device side receiving section, 82 audio demodulation circuit, 84 audio signal amplification circuit, L1 transmission line, L
2 Receive line.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kiyomi Kojima 781 Shin-Yoshida-cho, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Inside JR RC Special Machine Co., Ltd. (72) Inventor Shinji Ishida Shin-Yoshida, Kohoku-ku, Yokohama-shi, Kanagawa 781 Machi-cho JRC Special Machinery Co., Ltd. (72) Inventor Mitsuru Uejima 781 Shin-Yoshida-cho, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture JR JC Specialty Machinery Co., Ltd. (72) Inventor Soji Ito Kanagawa Prefecture 781 JR RC Toki Co., Ltd., Kohoku-ku, Yokohama City (72) Inventor Hironobu Takeuchi 1-1, Akunouramachi, Nagasaki City, Nagasaki Prefecture Mitsubishi Heavy Industries, Ltd. 72) Inventor Takuya Yamaguchi 1-1, Akunouramachi, Nagasaki City, Nagasaki Prefecture Mitsubishi Heavy Industries, Ltd. Design inside of a section F-term (reference) 5D005 BB11 5K002 AA05 FA03 GA02 GA06

Claims (16)

[Claims] 1. An indoor conversation system comprising at least one portable indoor conversation terminal and a management device for managing indoor conversation, wherein the indoor conversation terminal receives a voice and outputs a voice signal. Terminal-side audio receiving means, terminal-side frequency modulating means for frequency-modulating a high-frequency signal with an audio signal from the terminal-side audio receiving means to generate an audio high-frequency signal, and audio high-frequency generated by the frequency modulation Terminal-side infrared radiation means for converting a signal into infrared light and radiating the infrared light; the management device is installed at a predetermined position in a room and capable of receiving infrared light; An indoor conversation system including a device-side demodulation unit that demodulates a signal. 2. The indoor conversation system according to claim 1, wherein said terminal-side infrared radiating means includes a plurality of infrared radiating elements having a predetermined directional angle for each predetermined angle within a range of said predetermined directional angle. 3. The indoor conversation according to claim 1, wherein said device-side infrared light receiving means comprises a plurality of infrared light receiving elements having a predetermined directional angle for each predetermined angle within a range of the predetermined directional angle. system. 4. The indoor communication system according to claim 1, wherein said indoor communication terminal is a terminal-side infrared light receiving means capable of receiving infrared light, and demodulates the received infrared light into an audio signal. Terminal-side demodulation means, and terminal-side audio output means for outputting the demodulated audio signal as audio, wherein the management device receives the audio and converts the audio signal into an audio signal; A device-side frequency modulating means for frequency-modulating a sound signal from the device-side sound receiving means to generate a sound high-frequency signal; and a sound high-frequency signal installed at a predetermined position in a room and generated by the device-side frequency modulating means. Indoor communication system comprising: a device-side infrared radiating unit that converts a light into infrared light and emits the converted infrared light. 5. The indoor conversation system according to claim 4, wherein said terminal-side infrared light receiving means comprises a plurality of infrared light receiving elements having a predetermined directional angle for each predetermined angle within a range of said predetermined directional angle. 6. The indoor conversation according to claim 4, wherein said device-side infrared radiation means comprises a plurality of infrared radiation elements having a predetermined directivity angle for each predetermined angle within a range of said predetermined directivity angle. system. 7. An indoor conversation system comprising at least one portable indoor conversation terminal and a management device for managing indoor conversation, wherein the indoor conversation terminal is a terminal capable of receiving infrared rays. Infrared light receiving means, terminal-side demodulation means for demodulating the received infrared light into an audio signal, and terminal-side audio output means for outputting the demodulated audio signal as audio, wherein the management device receives audio. A device-side audio receiving unit that converts the high-frequency signal into an audio signal; a device-side frequency modulating unit that generates a high-frequency audio signal by frequency-modulating the high-frequency signal with the audio signal from the device-side audio receiving unit; And an apparatus-side infrared radiating means for converting an audio high-frequency signal generated by the apparatus-side frequency modulating means into infrared light and radiating the same. 8. The indoor conversation system according to claim 7, wherein said terminal-side infrared light receiving means comprises a plurality of infrared light receiving elements having a predetermined directivity angle for each predetermined angle within a range of said predetermined directivity angle. 9. The indoor conversation according to claim 7, wherein said device-side infrared radiation means comprises a plurality of infrared radiation elements having a predetermined directivity angle for each predetermined angle within a range of said predetermined directivity angle. system. 10. An indoor communication terminal capable of forming an indoor communication system, comprising: a voice receiving means for receiving a voice and converting it to a voice signal; and a frequency modulation using a voice signal from the voice receiving means. An indoor communication terminal comprising: frequency modulation means for generating an audio high-frequency signal by performing the above-mentioned operation; and infrared radiation means for converting the audio high-frequency signal generated by the frequency modulation into infrared light and emitting the infrared light. 11. The indoor conversation terminal according to claim 10, wherein said infrared radiation means comprises a plurality of infrared radiation elements having a predetermined directivity angle for each predetermined angle within a range of the predetermined directivity angle. 12. The indoor conversation terminal according to claim 10, wherein: an infrared light receiving means capable of receiving infrared light; a demodulation means for demodulating the received infrared light into an audio signal; An indoor communication terminal comprising: a voice output unit that outputs voice. 13. The indoor conversation terminal according to claim 12, wherein said infrared light receiving means comprises a plurality of infrared light receiving elements having a predetermined directional angle for each predetermined angle within a range of said predetermined directional angle. 14. The indoor conversation terminal according to claim 12, wherein said voice output means is a headphone type means, and said infrared radiation means and said infrared light reception means are heads of said voice output means. Indoor communication terminal arranged in the office. 15. An indoor communication terminal capable of forming an indoor communication system, comprising: infrared receiving means capable of receiving infrared light; demodulating means for demodulating the received infrared light into an audio signal; And a voice output means for outputting the voice as a voice. 16. The indoor conversation terminal according to claim 15, wherein said infrared light receiving means comprises a plurality of infrared light receiving elements having a predetermined directional angle for each predetermined angle within a range of said predetermined directional angle.