JP2005318049A - Communication apparatus and communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To distribute emergency broadcast to a commercially available portable AV device. <P>SOLUTION: An apparatus is configured with a radio receiving unit for receiving external data such as emergency contact, a viewing data input unit from the portable AV device, a switching processing unit for switching between viewing data and the external data, and a voice outputting unit for outputting the viewing data or the external data which are switched to the portable AV device. This configuration enables easily connecting to the portable AV device owned by a user, the switching processing unit to switch the external data received by the radio receiving unit and the viewing data from the viewing data input unit, and distributing the external data such as emergency contact by outputting from the voice outputting unit. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a communication apparatus that can receive an emergency call or a specific service even when a user uses a commercially available AV device in an airplane or the like.

  In recent years, with the spread of portable AV equipment, not only listening to radio broadcasts and music, but also watching TV and DVDs can be enjoyed while traveling in a vehicle or on foot.

  However, when such a portable AV device is used, since it is cut off from information from the outside, there is a possibility that someone will not notice even if someone speaks and may miss an emergency broadcast.

  Note that a dedicated AV device installed in a specific place, such as an airplane or a bullet train, is set in advance so that a guide broadcast including an emergency broadcast is interrupted. If you are listening to the broadcast, you will not miss the guidance broadcast. However, such interruptions are possible only in dedicated AV equipment (headphone stereo) prepared in advance in the vehicle, and a commercially available headphone stereo owned by a general user is used. In such a case, such a function could not be realized.

 In view of such a situation, as a conventional example that allows audio from outside to be easily interrupted in a wider range, even when listening to music or radio broadcasting with headphones stereo in any place For example, there is Patent Document 1.

An information reproduction apparatus disclosed in Patent Document 1 includes a connection unit that performs a connection procedure with a communication device, a reception unit that receives data transmitted from the communication device based on a result of the procedure performed by the connection unit, and a connection unit Based on the result of the procedure by the transmission means for sending the notification information for notifying the acceptance of the connection to the communication device, and when the transmission of the notification information is completed by the transmission means, the output data is reproduced from the recording medium. To switching means for switching to data received by the receiving means.
JP 2001-197019 A

  However, in the invention of Patent Document 1, it is necessary to add a processing unit for switching between viewing data and external data to all portable AV devices owned by the user. Price increases. In addition, when a processing unit that switches between viewing data and external data is installed in some devices, it becomes a dedicated device, so it is inevitable that the unit price of the device will increase, and it is likely that the device will be avoided and the spread of the device will be hindered Had problems.

  Furthermore, the invention of Patent Document 1 has a problem that viewing is interrupted by information that the user does not need because the viewing data and the external data are always switched when an interruption from the communication unit (external data transmitter) occurs. It was.

  Further, the invention of Patent Document 1 has a problem that viewing data is lost because switching between viewing data and external data is always performed when an interruption from a communication unit (external data transmitter) occurs.

  In order to solve the above problem, a communication apparatus according to claim 1 of the present invention includes an antenna that receives external data such as an interrupt command, a wireless reception unit that receives and processes wireless data, and audio from a portable AV device. A viewing data input unit that inputs viewing data of video and video, a switching processing unit that switches and outputs the viewing data and the external data, and audio that outputs viewing data or external data output from the switching processing unit And an output unit.

  With this configuration, it is possible to easily connect to a portable AV device owned by the user, and the external data received by the wireless reception unit and the viewing data from the viewing data input unit are switched by the switching processing unit and output from the audio output unit. Thus, it is possible to distribute external data such as emergency contact.

  The communication device according to claim 2 of the present invention is the communication device according to claim 1, wherein the wireless reception unit includes a data reception unit that receives data from a transmission server, and a command of the received data. A command priority confirmation processing unit that checks and compares priorities, a data buffer unit that stores data when the priority is low, and a switching command processing unit that transmits a switching command and data when the priority is high And a command transmission processing unit for transmitting a command for reading the data stored from the data buffer unit when the output data of the portable AV device is finished.

  With this configuration, it is possible to prevent the user from blocking viewing data due to external data having a low priority. Furthermore, since external data having a low priority is buffered, it is possible to listen when viewing data is over.

  A communication system according to claim 7 of the present invention is connected to a transmission server, which is a device for transmitting external data such as an entertainment environment and emergency communication, a portable AV device for viewing AV data, and the portable AV device. And a communication device that receives and determines the signal of the transmission server and switches external data such as emergency communication.

  With this configuration, it is possible to easily connect to a portable AV device owned by the user, and by switching between the external data received by the communication device and the viewing data from the portable AV device according to priority and viewing, emergency communication or the like can be performed. External data can be distributed.

  As described above, according to the communication device and the communication system of the present invention, it is possible to realize a mechanism for switching between viewing data and external data by connecting a communication adapter to a commercially available AV device.

 In addition, by assigning priorities to external data, it is possible to realize a mechanism for switching between viewing data and external data only for information necessary for the user.

 Furthermore, by assigning priorities to the external data, it is possible to realize a mechanism for switching between the external data and the viewing data buffered when the viewing data is separated or terminated.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a configuration diagram of a communication apparatus and a communication system according to the present invention.

 In FIG. 1, reference numeral 100 denotes a portable AV device, and in this embodiment, an example of a commercially available product that reproduces viewing data such as audio and video. Reference numeral 101 denotes a communication device (hereinafter referred to as a communication adapter), which is a device that is connected to a portable AV device in this embodiment and switches between viewing data and external data such as emergency communication. Reference numeral 102 denotes a person who is viewing audio or video on a portable AV device, and in this embodiment is assumed to be a passenger in an aircraft. Reference numeral 103 denotes a device that transmits an entertainment environment such as an AV service or a game and external data such as emergency communication to passengers in the aircraft, and is a transmission server. Reference numeral 104 denotes a person who makes an announcement such as an emergency broadcast. In the present embodiment, it is a crew member in the aircraft.

  The communication adapter and communication system of the present invention will be described with reference to FIG.

  Usually, the passenger 102 enjoys viewing of AV by playing back audio and video using the portable AV device 100. However, if there is a risk that the aircraft will fluctuate greatly due to airflow during the flight, the crew member 104 will make an announcement to urge the user to sit on the seat or wear the seat belt. An interrupt command is transmitted by the power supply or SW, and the announcement is started. Upon receiving the interrupt command and announcement, the transmission server 103 immediately transmits the interrupt command and announcement to the communication adapter 101. The communication adapter 101 that has received the interrupt command and the announcement switches the audio / video viewing data being viewed by the passenger to external data such as an emergency call that is an announcement of the crew member according to the priority of the interrupt command, and the passenger's headphones Output to.

  As described above, a commercially available portable AV device is used by connecting a communication adapter to a commercially available portable AV device and issuing an interrupt command when an emergency call is made to switch between viewing data and external data. It becomes feasible to deliver emergency notifications to passengers who are traveling.

  FIG. 2 is a configuration diagram of the communication adapter 101 in the present invention. In FIG. 2, reference numeral 200 designates an IF (stereo mini jack) for inputting audio / video viewing data from a portable AV device as a viewing data input unit. Reference numeral 201 denotes an antenna that receives external data such as an interrupt command from a transmission server and a wireless reception unit that receives and processes wireless data. Reference numeral 202 denotes a switching processing unit that switches and outputs viewing data and external data. Reference numeral 203 denotes an IF (stereo mini jack) that outputs viewing data output from the switching processing unit or external data to headphones worn by passengers as a sound output unit.

  The communication adapter of the present invention will be described with reference to FIG.

  Usually, the passenger 102 views audio / video viewing data from a portable AV device input from the viewing data input unit 200. The data flow in this case is shown.

 The viewing data input from the portable AV device 100 to the viewing data input unit 200 is immediately transmitted to the switching processing unit 202. The switching processing unit 202 receives the data from the viewing data input unit 200 and confirms that there is no interrupt command such as an emergency contact, and then immediately transmits the viewing data to the audio output unit 203. The audio output unit 203 that has received the viewing data immediately outputs the viewing data to the passenger's 102 headphones.

  Next, the flow of data when an interrupt command occurs is shown.

  The viewing data input from the portable AV device 100 to the viewing data input unit 200 is immediately transmitted to the switching processing unit 202. On the other hand, when receiving external data such as an interrupt command from the transmission server 103, the wireless reception unit 201 immediately transmits a switching command and data (announcement) to the switching processing unit 202. The switching processing unit 202 switches the viewing data from the viewing data input unit 200 and the announcement from the wireless receiving unit 201 in accordance with a switching command from the wireless receiving unit 201 and transmits the announcement to the audio output unit 203. The audio output unit 203 that has received the announcement immediately outputs the viewing data to the passenger's 102 headphones.

  Next, the operation of the wireless reception unit 201 will be described in detail.

  FIG. 3 is a configuration diagram of the wireless reception unit 201 in the present invention. FIG. 4 is a priority table held inside. In FIG. 3, reference numeral 300 denotes an antenna that receives external data such as an interrupt command from the transmission server 103 and a data receiving unit that receives wireless data. A command priority confirmation processing unit 301 confirms the priority of the external data interrupt command. A command priority confirmation processing unit 302 is a data buffer for buffering external data when it is determined that the interrupt priority is low. A command priority confirmation processing unit 303 is a switching command processing unit that transmits a switching command to the switching processing unit 202 when it is determined that the priority is high. When the viewing data ends from the switching processing unit 202, 304 receives a data end flag to be transmitted, and accumulates the switching command processing unit 303 from the switching command and the data buffer via the command priority confirmation processing unit 301. The command transmission processing unit outputs the external data that has been stored.

  The flow of data when an interrupt command is generated in the wireless receiver of the present invention will be described with reference to FIG.

  The data receiving unit 300 that has received external data such as an interrupt command from the transmission server 103 immediately transmits the received external data to the command priority confirmation processing unit 301.

  The command priority confirmation processing unit 301 that has received the external data separates the external data from the command and the data (announcement), refers to a table (FIG. 4) held therein, and sets the priority level set in advance. In this embodiment, if the priority level of the command is equal to or higher than the preset level (priority 1) according to the assumption (priority is set to 1), the switching command transmission command is immediately sent to the switching command processing unit 303. And send data. The switching command processing unit 303 that has received the command and data for transmitting the switching command immediately transmits the received switching command and data to the switching processing unit 202.

On the other hand, in the command priority confirmation processing unit 301, when the received command refers to the internally held table (FIG. 4), the command priority level is not higher than a preset level (for example, Priority 3) Immediately writes data in the external data to the data buffer 302. When the command priority confirmation processing unit 301 receives a switching instruction and a command for outputting the external data accumulated from the data buffer from the command transmission processing unit 304, the command is read from the data buffer 302 and the switching processing unit 202. The switching command and data read from the buffer are transmitted to the switching processing unit 202. Next, the operation of the switching processing unit 202 will be described in detail.

  FIG. 5 is a configuration diagram of the switching processing unit 202 in the present invention. In FIG. 5, reference numeral 500 denotes a viewing data receiving unit that receives viewing data such as audio and video from the portable AV device 100. Reference numeral 501 denotes an external data receiving unit that receives a switching command and data from the wireless receiving unit. Reference numeral 502 denotes a data switching processing unit that switches and outputs the viewing data when receiving a switching command from the external data receiving unit. Reference numeral 503 denotes a viewing data buffer for accumulating input viewing data when data is switched by a switching command from the external data receiving unit. Reference numeral 504 denotes a data output unit that receives data from the data switching processing unit 202 and outputs the data to the audio output unit.

  The flow of data when no switching command is generated in the switching processing unit of the present invention will be described with reference to FIG.

  The viewing data receiving unit 500 that has received viewing data such as audio and video from the portable AV device 100 immediately transmits the viewing data to the data switching processing unit 502.

  The data switching processing unit 502 that has received the viewing data immediately transmits the viewing data to the data output unit 504. The data output unit 504 that has received the viewing data immediately transmits the viewing data to the audio output unit 203 that outputs the viewing data to the passenger's headphones.

 The audio output unit 203 that has received the viewing data immediately transmits the viewing data to the passenger's headphones to the output.

  On the other hand, the flow of data when a switching command is generated in the switching processing unit of the present invention will be described with reference to FIG.

  The viewing data receiving unit 500 that has received viewing data such as audio and video from the portable AV device 100 immediately transmits the viewing data to the data switching processing unit 502.

  In addition, when input of viewing data such as audio and video from the portable AV device 100 is completed (for example, when a blank signal or blanking continues for a certain time), the viewing data receiving unit 500 stores the data in the data buffer 302 of the wireless receiving unit 201. In order to read data, a data end flag is transmitted to the command transmission processing unit 304 of the wireless reception unit 201. When there is data in the data buffer 302, a switching command and data are transmitted from the wireless reception unit 201. Subsequent processing is similar to the following.

  On the other hand, the external data receiving unit 501 that has received the switching command and data from the wireless receiving unit 201 immediately transmits data such as the switching command and emergency contact to the data switching processing unit 502.

  The data switching processing unit 502 that has received the viewing data from the viewing data receiving unit 500 and the data such as the switching command and emergency contact from the wireless receiving unit 201 immediately transmits external data such as emergency contact to the data output unit 504. Further, the data switching processing unit 502 writes the viewing data into the viewing data buffer 503 in order to store the viewing data received from the viewing data receiving unit 500 at the same time, and after the data output from the wireless receiving unit 201 is completed, the viewing data The viewing data is read from the buffer 503, and the read viewing data is transmitted to the data output unit 504. The data output unit 504 that has received the data immediately transmits the viewing data or the data to the audio output unit 203 that outputs the data to the passenger's headphones.

  When a switching command is generated even once, data is transmitted to the data output unit 504 via the viewing data buffer 503.

  As described above, a commercially available portable AV device is used by connecting a communication adapter to a commercially available portable AV device and issuing an interrupt command when an emergency call is made to switch between viewing data and external data. It becomes feasible to deliver emergency notifications to passengers who are traveling.

  In addition, by assigning priorities to external data, it is possible to realize a mechanism for switching between viewing data and external data only for information necessary for the user.

 Furthermore, by assigning priorities to the external data, it is possible to realize a mechanism for switching between the external data and the viewing data buffered when the viewing data is separated or terminated.

  In this embodiment, the data switching command and the emergency contact of the crew were received via wireless, but the present invention is not limited to wireless, and the same effect can be expected even when an equivalent command is received via wire. it can.

  In the present embodiment, the priority level setting in the priority table is described in advance. However, setting in advance is not limited to an aircraft company, and information that passengers want (priority 1 is essential). The same effect can be expected even when a mechanism that can set the priority level according to) is implemented.

  In this embodiment, the priority level setting in the priority table is explained. However, it is not always necessary to assign a priority, and the same effect can be obtained even when a mechanism for switching all external data is implemented. Can be expected.

  In the present embodiment, the viewing data is described as audio data. However, the present invention is not limited to audio, and even when the viewing data is video by setting the output destination of the data to headphones or a portable AV device. Similar effects can be expected.

  In addition, in this embodiment, the method of use in an aircraft is described as an example, but it is not limited to an aircraft, but is limited to a room such as an LL classroom, baseball, soccer, or a racetrack. The same effect can be expected even outdoors.

  In addition, in the present embodiment, a method for switching data output between viewing data such as audio and video and announcement information such as emergency broadcast is described as an example, but it is not limited to announcement information such as emergency broadcast. The same effect can be expected even in the case of various data such as audio, video and games as in-flight entertainment services. By using this invention, in-flight entertainment services using portable AV equipment owned by users and rental companies are possible. It becomes.

  In this embodiment, the wireless system is described as an emergency contact receiving method as an example. However, the present invention is not limited to the wireless system, and the same effect can be expected even in the wired system.

  In the present embodiment, the function of the present invention is described as a communication adapter. However, the mounting location of the function of the present invention is not limited, and the function of the present invention is mounted on an armrest of a headphone or a seat. Even in this case, the same effect can be expected.

(Embodiment 2)
FIG. 6 is a configuration diagram of a communication apparatus and a communication system according to the present invention.

 In FIG. 6, reference numeral 100 denotes a portable AV device, and in this embodiment, an example of a commercially available product that reproduces viewing data such as audio and video. Reference numeral 101 denotes a communication device (hereinafter referred to as a communication adapter), which is a device that is connected to a portable AV device in this embodiment and switches between viewing data and external data such as emergency communication. Reference numeral 102 denotes a person who is viewing audio or video on a portable AV device, and in this embodiment is assumed to be a passenger in an aircraft. Reference numeral 103 denotes a device that transmits an entertainment environment such as an AV service or a game and external data such as emergency communication to passengers in the aircraft, and is a transmission server. Reference numeral 104 denotes a person who makes an announcement such as an emergency broadcast. In the present embodiment, it is a crew member in the aircraft. Reference numeral 600 denotes a device that supplies power to a commercially available portable AV device, and is a power supply unit in the present embodiment.

  The communication adapter and communication system of the present invention will be described with reference to FIG.

 Usually, the passenger 102 enjoys viewing of AV by playing back audio and video using the portable AV device 100. However, if there is a risk that the aircraft will fluctuate greatly due to airflow during the flight, the crew member 104 will make an announcement to urge the user to sit on the seat or wear the seat belt. An interrupt command is transmitted by the power supply or SW, and the announcement is started. Upon receiving the interrupt command and announcement, the transmission server 103 immediately transmits the interrupt command and announcement to the communication adapter 101. The communication adapter 101 that has received the interrupt command and the announcement switches the audio / video viewing data being viewed by the passenger to external data such as an emergency call that is an announcement of the crew member according to the priority of the interrupt command, and the passenger's headphones Output to.

  In addition, since the portable AV device 100 normally operates with the battery activated, the accumulated power of the battery is consumed when the flight time is long. Therefore, as an in-flight service, power is supplied from a power supply unit 600 that supplies power in the machine.

  As described above, a commercially available portable AV device is used by connecting a communication adapter to a commercially available portable AV device and issuing an interrupt command when an emergency call is made to switch between viewing data and external data. It becomes feasible to deliver emergency notifications to passengers who are traveling.

  Furthermore, by supplying power from the power supply unit 600, the user does not need to worry about the remaining amount of power of the battery.

  FIG. 7 is a configuration diagram of a communication adapter according to the present invention. In FIG. 7, reference numeral 200 designates an IF (stereo mini jack) for inputting audio or video viewing data from a portable AV device as a viewing data input unit. Reference numeral 201 denotes an antenna that receives external data such as an interrupt command from a transmission server and a wireless reception unit that receives and processes wireless data. Reference numeral 202 denotes a switching processing unit that switches and outputs viewing data and external data. Reference numeral 203 denotes an IF (stereo mini jack) that outputs viewing data output from the switching processing unit or external data to headphones worn by passengers as a sound output unit.

  700 is a voltage (V) and current (A) set by the user according to the power supply specification of the portable AV device used by the user, or via a memory having the specification of the portable AV device, and the portable AV device and the communication adapter. Is a voltage / current selector unit that switches and outputs the set value of the power supply according to the set value of the voltage (V) and the current (A) acquired through communication.

 Reference numeral 701 denotes a power input IF from the power supply unit 600, which is a power input unit. Reference numeral 702 denotes a power supply conversion unit that converts the voltage and current from the power supply input unit according to the set value of the voltage / current selector unit. Reference numeral 703 denotes a power output unit that outputs power according to whether or not the power from the power conversion unit is output to the portable AV device.

  The communication adapter of the present invention will be described with reference to FIG.

  The procedure for switching between viewing data and external data is as described in the first embodiment. Here, the operation flow of the power supply process will be described.

  The power input unit 701 receives power supply from the power supply unit 600. Further, in the voltage / current selector unit 700, the user uses the selector means such as SW to supply power to the portable AV device owned by (or used by) the user, or to the portable AV device via the memory having the portable AV device specifications. The set voltage value (V) and current value (A) are transmitted to the power conversion unit 702 according to the set value of the power supply specification acquired through communication between the device and the communication adapter.

  The power conversion unit 702 receives the power transmitted from the power input unit 701 and receives the voltage value (V) and the current value (A) transmitted from the voltage / current selector unit 700. The power conversion unit 702 converts the power transmitted from the power input unit 701 in accordance with the set values of the voltage value (V) and the current value (A) transmitted from the voltage / current selector unit 700, and outputs a power output. Power is transmitted to the unit 703.

  In addition, the viewing data input unit 200 detects the presence or absence of input to the stereo mini jack of the AV output (via cable) of the portable AV device, and transmits the presence or absence of input (stereo mini jack presence / absence information) to the power output unit 703. .

  In the power output unit 703, when the stereo mini jack presence / absence information from the viewing data input unit 200 indicates that there is a stereo mini jack input, the power received from the power conversion unit 702 is immediately output to the power input unit of the portable AV device. On the other hand, when the stereo minijack presence / absence information from the viewing data input unit 200 indicates that there is no stereo minijack input, the power received from the power conversion unit 702 is not output to the power input unit of the portable AV device.

  As described above, a commercially available portable AV device is used by connecting a communication adapter to a commercially available portable AV device and issuing an interrupt command when an emergency call is made to switch between viewing data and external data. It becomes feasible to deliver emergency notifications to passengers who are traveling.

  Furthermore, by supplying power to the portable AV device according to whether or not there is an input to the stereo mini jack, it is possible to promote the use of the communication adapter and promote the opportunity for passengers to view the emergency broadcast.

  In this embodiment, it is described that the user sets the power supply and voltage. However, the setting person is not limited to the user, but is set by a third party in advance according to the rental equipment and boarding location (personal information). The same effect can be expected even with automatic setting.

 In this embodiment, the determination of whether or not to supply power is described based on whether or not there is an input to the stereo mini jack, but it is not limited to whether or not there is an input to the stereo mini jack. The same effect can be expected even if it is determined by whether or not there is an input.

  In the present embodiment, whether or not to supply power is described based on whether or not there is an input to the stereo mini jack, but the same effect can be expected when it is determined in advance according to the boarding class and service.

  The communication device and the communication system according to the present invention can be easily connected to a commercially available AV device and can switch between viewing data and external data. Useful.

Configuration diagram of communication apparatus and communication system of first invention Configuration diagram of communication apparatus of first invention Configuration diagram of wireless receiver in communication device of first invention The figure which shows an example of the command priority of 1st invention The block diagram of the switching process part in the communication apparatus of 1st invention Configuration diagram of communication apparatus and communication system of second invention Configuration diagram of communication apparatus of second invention

Explanation of symbols

100 Portable AV equipment 101 Communication device 102 Passenger (viewer)
103 Transmission Server 104 Crew 200 Viewing Data Input Unit (Headphone IF Unit)
201 wireless reception unit 202 switching processing unit 203 audio output unit (headphone IF unit)
DESCRIPTION OF SYMBOLS 300 Data receiving part 301 Command priority confirmation process part 302 Data buffer 303 Switching command processing part 500 Viewing data receiving part 501 External data receiving part 502 Data switching processing part 503 Viewing data buffer 504 Data output part 600 Power supply part 700 Voltage / current selector 700 701 Power input unit 702 Power conversion unit 703 Power output unit (ON / OFF)

Claims (8)

An antenna for receiving external data such as an interrupt command and a wireless receiving unit for receiving and processing wireless data;
A viewing data input unit for inputting audio and video viewing data from a portable AV device;
A switching processing unit that switches and outputs the viewing data and the external data;
Viewing data output from the switching processing unit, or an audio output unit that outputs external data;
A communication apparatus comprising: The wireless receiver is
A data receiving unit for receiving data from the transmission server;
A command priority confirmation processing unit for confirming and comparing command priorities of received data;
A data buffer for storing data when the priority is low;
When the priority is high, a switching command processing unit that transmits a switching command and data,
A command transmission processing unit for transmitting a command for reading data accumulated from the data buffer unit when the output data of the portable AV device is over;
The communication apparatus according to claim 1, further comprising: The switching processing unit
An external data receiver that receives data from the sending server;
A viewing data receiver for connecting the output of the portable AV device;
A data switching processing unit for switching and outputting the viewing data from the portable AV device and the data from the transmission server;
A data output unit for connecting the output of the data switching processing unit to a headphone or a display device;
The communication apparatus according to claim 1, further comprising: The switching processing unit
An external data receiving unit for receiving data from the transmission server and receiving a switching command and external data;
A viewing data receiver for connecting the output of the portable AV device;
A data switching processing unit that issues a command for switching the external data and the viewing data and storing the viewing data;
A viewing data buffer unit that stores viewing data in accordance with a viewing data storage command of the switching processing unit;
A data output unit for connecting the output of the data switching processing unit to a headphone or a display device;
The communication apparatus according to claim 1, further comprising: A power supply means;
The power supply means
A power input section for inputting an external power supply;
A voltage / current selector unit that matches the power supply specifications of the portable AV device;
A power conversion unit that converts power according to a set value of the voltage / current selector unit;
A power output unit that determines whether to output power from the presence or absence of viewing data input from the portable AV device, and outputs power to the outside when there is input;
The communication apparatus according to claim 1, further comprising: The command priority confirmation processing unit
3. A table relating to priority is held internally, and it is determined whether the priority is high or low according to the table, and if the priority is low, an instruction for storing data is issued. Communication device. A transmission server that is a device for transmitting external data such as an entertainment environment and emergency contact;
A portable AV device for viewing AV data;
A communication device that connects to the portable AV device and switches between viewing data and external data such as emergency communication by receiving and determining the signal of the transmission server;
A communication system comprising: A power supply unit;
The communication device
A function of determining whether or not viewing data is input from the portable AV device, and when there is an input, a function of outputting power from the power supply unit to the portable AV device;
The communication system according to claim 6, further comprising:

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