JP2006279523A - Audio signal output device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an audio signal output device which is equipped with an output terminal capable of outputting an audio signal to loudspeakers arranged in a plurality of rooms and can securely output an emergency alarm broadcast to the plurality of rooms by itself. <P>SOLUTION: The audio signal output device is equipped with a 1st input terminal inputting a signal from an emergency alarm broadcast transmitting and receiving device, a 2nd input terminal inputting a signal from a device other than the emergency alarm broadcast transmitting and receiving device, 1st and 2nd input switching parts which switch a signal inputted from the 1st or 2nd input terminal, an emergency alarm signal detection part which detects the emergency alarm signal, and a control part which performs control for switching the 2nd input switching part from the 2nd input terminal to the 1st input terminal when a detection signal is inputted from the emergency alarm signal detection part while the 1st input switching part is connected to the 1st input terminal and the 2nd input switching part is connected to the 2nd input terminal. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an audio signal output device that outputs an audio signal input from a television receiver or an optical disk playback device to a speaker or the like.

  Conventionally, when an emergency disaster such as an earthquake or a tsunami occurs or is likely to occur, an emergency warning broadcast is performed through a television broadcast or a radio broadcast. This emergency alert broadcasting system is disclosed in Non-Patent Document 1.

  The emergency warning broadcast is broadcast superimposed on the audio signal of the television broadcast or radio broadcast. As an apparatus for receiving an emergency alert broadcast, there is an emergency alert broadcast receiving apparatus as disclosed in Patent Document 1, Patent Document 2, and Patent Document 3.

  The composite audio device disclosed in Patent Document 1 is a device in which a playback device such as a cassette player or a compact disk (CD) player and a radio receiver are integrated, and the playback device is a cassette tape or CD. If the radio receiver receives an emergency warning broadcast even during playback of the audio signal recorded in, the playback of the audio signal by the playback device is stopped and switched to the emergency warning broadcast of the radio receiver for output. The emergency alert broadcast receiver disclosed in Patent Document 2 does not require a power cord and connects the main body directly to a power outlet. In the emergency broadcast receiving system disclosed in Patent Document 3, when the emergency broadcast processing unit receives an emergency warning broadcast even if the main power of the TV receiver is off, the main power of the TV receiver is turned off. Turn on and output emergency alert broadcast.

Emergency warning broadcasting system (http://www.nhk.or.jp/res/tvres5/h50100.htm) JP-A-6-21840 JP-A-10-98404 JP 2004-23591 A

  The emergency broadcast receiving devices disclosed in Patent Documents 1 to 3 described above do not include means for notifying emergency broadcasts simultaneously to a plurality of rooms when an emergency alert broadcast is received. For this reason, for example, when an emergency alert broadcast receiver is installed in a living room and the user is sleeping in a bedroom, there is an emergency alert broadcast at midnight, the emergency alert broadcast receiver receives an emergency alert signal and Even if the broadcast is output from the speaker, the user may not be able to hear the emergency alert broadcast.

  In addition, when the emergency alert broadcast receiving device is arranged in each room, the emergency alert broadcast receiving devices corresponding to the number of rooms are necessary and expensive.

  Also, depending on the location of the room, such as a room with poor reception of television broadcasts or radio broadcasts, the emergency alert broadcast cannot be received and the emergency alert broadcast may not be known to the user.

  The present invention relates to an audio signal output device having an output terminal capable of outputting an audio signal to speakers arranged in a plurality of rooms, and reliably outputs an emergency warning broadcast to a plurality of rooms by a single device. An object of the present invention is to provide an audio signal output device that can perform the above-described operation.

  The present invention provides an audio signal output device having an output terminal capable of outputting an audio signal to a plurality of speakers arranged in a plurality of rooms, from a broadcast receiving circuit capable of receiving an emergency warning broadcast. A first input unit that inputs a signal from the first input unit, a second input unit that inputs a signal from an audio device, and a first input switching unit that switches and outputs signals input from the first input unit and the second input unit. And a second input switching unit, a first output unit for performing signal processing on the signal output from the first input switching unit, amplifying and outputting the signal, and a signal processing for the signal output from the second input switching unit. A second output unit that performs amplification and output; a first output terminal that outputs a signal output from the first output unit; a second output terminal that outputs a signal output from the second output unit; Input from the first input section An emergency warning signal detection unit that outputs a detection signal when an emergency warning broadcast signal is detected from the signal, the first input switching unit is connected to the first input unit, and the second input switching unit is the second input unit. The second input switching unit is connected to the input unit, and the second input switching unit is configured to output the signal input from the first input unit from the second output terminal when a detection signal is input from the emergency warning signal detection unit. And a control unit for performing control to switch from the first input unit to the first input unit.

  The present invention provides an audio signal output device having an output terminal capable of outputting an audio signal to a plurality of speakers arranged in a plurality of rooms, from a broadcast receiving circuit capable of receiving an emergency warning broadcast. A first input unit that inputs a signal from the first input unit, a second input unit that inputs a signal from an audio device, and a first input switching unit that switches and outputs signals input from the first input unit and the second input unit. And a second input switching unit, a first output unit for performing signal processing on the signal output from the first input switching unit, amplifying and outputting the signal, and a signal processing for the signal output from the second input switching unit. A second output unit that performs amplification and output; a first output terminal that outputs a signal output from the first output unit; a second output terminal that outputs a signal output from the second output unit; Input from the first input section An emergency warning signal detection unit that outputs a detection signal when an emergency warning broadcast signal is detected from the signal, a power supply unit that supplies power to the first output unit and the second output unit, and the power supply unit is in a standby state When the first input switching unit is connected to the first input unit, the second input switching unit is connected to the second input unit, and a detection signal is input from the emergency warning signal detection unit, the power supply A control unit that controls the second input switching unit to be switched from the second input unit to the first input unit so that the signal input from the first input unit is output from the second output terminal by turning the unit on. It is characterized by providing.

  The audio signal output device according to the present invention includes a first input terminal for inputting a signal from a broadcast receiving device capable of receiving an emergency alert broadcast, and a first input terminal for inputting a signal from a device other than the broadcast receiving device. Two input terminals, a first input switching section and a second input switching section for switching and outputting signals input from the first input terminal and the second input terminal, and a signal output from the first input switching section. A first output unit that performs signal processing and amplifies and outputs, a second output unit that performs signal processing and amplifies and outputs the signal output from the second input switching unit, and is output from the first output unit When an emergency warning broadcast signal is detected from a first output terminal that outputs a signal, a second output terminal that outputs a signal output from the second output unit, and a signal that is input from the first input terminal Output detection signal An emergency warning signal detection unit and the first input switching unit are connected to the first input terminal, the second input switching unit is connected to the second input terminal, and a detection signal is input from the emergency warning signal detection unit A control unit for controlling the switching of the second input switching unit from the second input terminal to the first input terminal so that a signal input from the first input terminal is output from the second output terminal. It is characterized by that.

  The audio signal output device according to the present invention includes a first input terminal for inputting a signal from a broadcast receiving device capable of receiving an emergency alert broadcast, and a first input terminal for inputting a signal from a device other than the broadcast receiving device. Two input terminals, a first input switching section and a second input switching section for switching and outputting signals input from the first input terminal and the second input terminal, and a signal output from the first input switching section. A first output unit that performs signal processing and amplifies and outputs, a second output unit that performs signal processing and amplifies and outputs the signal output from the second input switching unit, and is output from the first output unit When an emergency warning broadcast signal is detected from a first output terminal that outputs a signal, a second output terminal that outputs a signal output from the second output unit, and a signal that is input from the first input terminal Output detection signal An emergency warning signal detection unit, a power supply unit that supplies power to the first output unit and the second output unit, the power supply unit is in a standby state, and the first input switching unit is connected to the first input terminal. The second input switching unit is connected to the second input terminal, and when a detection signal is input from the emergency warning signal detection unit, the power supply unit is turned on and a signal input from the first input terminal is input to the second input terminal. And a control unit that performs control to switch the second input switching unit from the second input terminal to the first input terminal so as to output from two output terminals.

  The invention of the present application is an audio signal output device, an input terminal for inputting a signal from a broadcast receiving device capable of receiving an emergency warning broadcast, and a signal input to the input signal from the input terminal for amplification and output. An output switching unit, an input switching unit that switches an output destination of the signal output from the output unit, a first output terminal and a second output terminal that output a signal output from the input switching unit, and the input terminal An emergency warning signal detection unit that outputs a detection signal when an emergency warning broadcast signal is detected from the input signal, and a signal that is input from the input terminal when the detection signal is input from the emergency warning signal detection unit. And a control unit that controls the input switching unit to output from one output terminal and the second output terminal.

  The invention of the present application is an audio signal output device, wherein an input terminal for receiving a signal from a broadcast receiving device capable of receiving an emergency alert broadcast is input, and a signal input from the input terminal is subjected to signal processing to be amplified and output. An output switching unit, an input switching unit that switches an output destination of the signal output from the output unit, a first output terminal and a second output terminal that output the signal output from the input switching unit to the outside, and the input An emergency warning signal detection unit that outputs a detection signal when an emergency warning broadcast signal is detected from a signal input from a terminal; a power supply unit that supplies power to the output unit; and When the detection signal is input from the alarm signal detection unit, the power supply unit is turned on and signals input from the input terminal are output from the first output terminal and the second output terminal. Characterized in that it comprises a control unit for controlling the fill-force changer.

  The invention of the present application is the above-described audio signal output device, wherein the emergency warning signal detection unit is an emergency warning broadcast of at least one of analog television broadcasting, radio broadcasting, terrestrial digital television broadcasting, and BS digital broadcasting. An emergency alert signal is detected from a signal input from an emergency alert broadcast receiving apparatus that receives the signal.

  According to the present invention, in an audio signal output device having an output terminal capable of outputting an audio signal to speakers arranged in a plurality of rooms, an emergency warning broadcast can be reliably transmitted to a plurality of rooms by one device. Can be output.

FIG. 1 is a block diagram showing a schematic configuration of an embodiment of an audio signal output apparatus of the present invention.
The audio signal output device of the present invention is, for example, an audio visual (AV) amplifier, and includes a plurality of input terminals for connecting a plurality of devices, and a plurality of input signals are output to different output destinations. Output terminal. For example, the AV amplifier outputs an audio signal input from a CD player to a speaker installed in a viewing room (zone A) and outputs an audio signal input from a mini disk (MD) player to a bedroom (zone). It can be output to the speaker installed in B). In the present embodiment, the audio signal output device is described as including three input terminals and including three output terminals. However, the present invention is not limited thereto, and includes two or four or more input terminals. You may provide the output part.

  The audio signal output device includes a first input terminal 1a to a third input terminal 1c, an emergency warning signal detection unit 2, a first input switching unit 3a to 3c, a first output unit 4a to a third output unit 4c, and a first output terminal. 5a to a third output terminal 5c, an operation unit 6, a power supply unit 7, and a control unit 8.

  The audio signal output device includes a plurality of input terminals (first input terminal 1a to third input terminal 1c). A disc player, a tape player, a television receiver, a radio receiver, an emergency warning broadcast receiver, and the like are connected to the first input terminal 1a to the third input terminal 1c. In this embodiment, the emergency alert broadcast receiver 9 is connected to the first input terminal 1a, the CD player 10 is connected to the second input terminal 1b, and the MD player 11 is connected to the third input terminal 1c.

  In the present embodiment, a dedicated emergency alert broadcast receiving device will be described as an example of a device that receives an emergency alert broadcast. The emergency alert broadcast is carried out by analog television broadcast, radio broadcast, terrestrial digital television broadcast, and BS (Broadcasting Satellite) digital broadcast. The emergency alert broadcast receiver of this embodiment receives the above-mentioned broadcast radio. Or a television receiver.

  The emergency alert signal detector 2 demodulates a signal input from the first input terminal 1a to which the emergency alert broadcast receiver 9 is connected, detects the emergency alert signal, and detects the emergency alert signal, the detection signal will be described later. Output to the control unit 8.

  The emergency alert signal is transmitted from a broadcasting station as an audio signal of radio broadcasting or television broadcasting in analog broadcasting. The analog emergency warning signal is a 64 bps (bit per second) FSK (frequency shift keying) signal, which is a combination of two signals of 640 Hz and 1024 Hz. The emergency alert signal includes a sound start signal and an end signal such as “Piropiro”, and the start signal and the end signal are paired and broadcast as an emergency alert broadcast. An announcement or telop of emergency alert information is inserted between the start signal and the end signal. When the emergency warning signal detection unit 2 detects the start signal of the emergency warning signal from the signal input from the input terminal 1a, the emergency warning signal detection unit 2 outputs a detection signal to the control unit 8 described later.

  In emergency alert broadcasting, test broadcasting is performed at a predetermined time (for example, midnight), and only an end signal is transmitted for the test broadcasting. The emergency warning signal detection unit 2 does not output the detection signal to the control unit 8 when receiving only the end signal of the emergency warning signal. As a result, the emergency alert signal detector 2 can detect an emergency alert signal excluding the emergency alert broadcast test broadcast and notify the controller 8 described later.

  The digital emergency alert signal uses TMCC (Transmission and Multiplexing Configuration and Control) data structure related to digital broadcasting. Descriptor tag (0xFC) indicating emergency alert information, emergency alert information (announcement and telop) ) Start / end flags indicating the start of transmission, during transmission, and the end of transmission. Also in the case of digital broadcasting, an emergency warning signal such as “Piropiro” is recorded in the data stream and transmitted from the broadcasting station. When the emergency warning signal detection unit 2 detects the descriptor tag from the signal input from the input terminal 1a, the emergency warning signal detection unit 2 outputs a detection signal to the control unit 8 described later.

  The first input switching unit 3a to the third input switching unit 3c output signals to be output to the first output unit 4a to the third output unit 4c in the subsequent stage under the control of the control unit 8 to be described later. Switching is performed from among a plurality of audio signals input from the three input terminals 1c.

  The first output unit 4a to the third output unit 4c include a first signal processing unit 12a to a third signal processing unit 12c, and a first amplification unit 13a to a third amplification unit 13c, respectively. The first signal processing unit 12a to the third signal processing unit 12c perform signal processing such as encoding and expansion processing on the input audio signal under the control of the control unit 8 described later, and output the result. The first amplifying unit 13a to the third amplifying unit 13c amplify the signals input from the first signal processing unit 12a to the third signal processing unit 12c, respectively, and the amplified audio signals are respectively output to the first output terminal 4a to the third output. Output to terminal 4c.

  The first output terminal 5a to the third output terminal 5c output the signals output from the first output unit 4a to the third output unit 4c, respectively, to the speakers.

  The audio signal output device is input from a plurality of devices (emergency warning broadcast receiver 9, CD player 10, MD player 11) via a plurality of input terminals (first input terminal 1a to third input terminal 1c). A plurality of input switching units (first input switching unit 3a to 3rd) corresponding to each input terminal so that a plurality of audio signals can be output to speakers of different output destinations (zone 1, zone 2, zone 3). Input switching unit 3c), a plurality of output units (first output unit 3a to third output unit 3c) and a plurality of output terminals (first output terminal 5a to third output terminal 5c).

  The audio signal output device controls, for example, an audio signal input from the emergency warning broadcast receiver 9 through the first input switching unit 3a, the first output unit 4a, and the first output terminal 5a under the control of the control unit 8 described later. A signal input to the speaker (first speaker 14a) installed in the living room (zone 1) and input from the CD player 10 is passed through the second input switching unit 3b, the second output unit 4b, and the second output terminal 5b. A signal input to the speaker (first speaker 14b) installed in the viewing room (zone 2) and input from the MD player 11 is passed through the third input switching unit 3c, the third output unit 4c, and the third output terminal 5c. It can output to the speaker (1st speaker 14c) installed in the bedroom (zone 3).

  The operation unit 6 is a power switch for switching on / off / standby (standby) of the power source, and the audio signal input from the first input terminal 1a to the third input terminal 1c to which output destination (first output terminal 5a (first speaker) 14 a) to third output terminal 5 c (third speaker 14 c)), an input / output setting switch for setting whether to output, a volume adjustment volume for adjusting the output volume of the audio signal, and the like. The operation unit 6 outputs an instruction signal to the control unit 8 to be described later based on switching of each switch and volume setting switch.

  The power supply unit 7 supplies power supplied from a commercial AC power supply or the like to each circuit. The power supply unit 7 has an on state, an off state, and a standby state. When the power supply unit 7 is in an off state, the supply of power to all the circuits inside the apparatus is stopped. When the power supply unit 7 is in a standby state, power is not supplied to circuits such as an output unit, but power is supplied to a control unit and a remote control receiving unit (not shown). When a power-on instruction is input from the remote controller, when a power-on instruction signal is input from the remote control receiving unit to the control unit 8, the control unit 8 supplies power to other circuits (output unit, etc.) with respect to the power source unit 7. Control to supply. When the power supply unit 7 is in the off state, the supply of power to all circuits including the control unit 8 and the remote control reception unit is stopped. Based on on / off / standby of the power switch of the operation unit 6, the supply of power to each circuit or the stop of the supply is switched. The power supply unit 7 supplies power to the control unit 8 and the emergency warning signal detection unit 2 described later even in the standby state.

  The control unit 8 comprehensively controls the audio signal output device. Based on the instruction signal from the operation unit 6, the control unit 8 outputs signals input from the first input terminal 1 a to the third input terminal 1 c to the output destination (first output terminal 5 a (first output terminal) set by the operation unit 6. Control is performed to switch the first input switching unit 3a to the third input switching unit 3c so as to output to the speakers 14a) to the third output terminal 5c (third speaker 14c)). The control unit 8 controls the first signal processing unit 12a to the third signal processing unit 12c and the first amplification unit 13a to the third amplification unit 13c of the first output unit 4a to the third output unit 4c.

  When the detection signal is input from the emergency warning signal detection unit 2, the control unit 8 outputs the signal input from the emergency warning broadcast receiving device 9 from all of the first output terminal 5a to the third output terminal 5c. Controls switching of signals input to the 1-input switching unit 3a to the third input switching unit 3c.

  For example, the control unit 8 outputs the audio signal of the CD player 10 from the second output terminal 5b, outputs the audio signal of the MD player 11 from the third output terminal 5c, and the emergency warning signal detection unit 2 receives the emergency warning broadcast. When an emergency alert signal is detected from the signal of the device 9 and a detection signal is input from the emergency alert signal detection unit 2, the emergency alert broadcast receiving device 9 from all of the first output terminal 5a to the third output terminal 5c. The second input switching unit 3b and the third input switching unit 3c are controlled to switch the input signal to the emergency alert broadcast receiving device 9 side so as to output the input signal.

  Further, even when the power supply unit 7 is in the standby state, the control unit 8 detects that the emergency warning signal is input in the emergency warning signal detection unit 2, and when the detection signal is input from the emergency warning signal detection unit 2 Then, the power supply unit 7 is controlled to be turned on. Thereafter, the first input switching unit 3a to the third input switching unit 3c are controlled, and the switch is switched to the first input terminal 1a (emergency warning broadcast receiving device 9) side in all the input / output switching units, and the first output terminal The signals input from the emergency alert broadcast receiver 9 are output from the 5a to 3rd output terminals 5c, respectively.

  Thus, even when the audio signal output device is in the standby state, when the emergency alert broadcast receiving device 9 receives the emergency alert broadcast, the emergency alert is automatically sent from the first output terminal 5a to the third output terminal 5c. Since the broadcast is output, the user can surely listen to the emergency alert broadcast in a different room.

The operation of the audio signal output apparatus of this embodiment will be described with reference to FIGS.
FIG. 2 is a diagram for explaining the operation when an emergency warning signal is detected in the audio signal output device of this embodiment.
In FIG. 1, the audio signal output device has an emergency warning broadcast receiver 9 connected to a first input terminal 1a, a CD player 10 connected to a second input terminal 1b, and an MD player 11 connected to a third input terminal 1c. Has been.

  The operation unit 6 is set so that the signal of the emergency warning broadcast receiver 9 is output from the first speaker 14a (first output terminal 5a), and the CD player 10 is output from the second speaker 14b (second output terminal 5b). 2 is set to output the audio signal of the MD player 11 from the third speaker 14c (third output terminal 5c), as shown in FIG. The first input switching unit 3a has a switching switch connected to the emergency alert broadcast receiver 9 side, the second input switching unit 3b has a switching switch connected to the CD player 10 side, and the third input switching unit 3c has a switching switch. A switch connects to the MD player 11 side.

  The emergency warning signal detector 2 shown in FIG. 1 always monitors a signal input from the first input terminal 1a. When an emergency alert signal is output from the emergency alert broadcast receiver 9, the emergency alert signal detector 2 outputs an emergency alert signal from the signal input from the first input terminal 1a to which the emergency alert broadcast receiver 9 is connected. Detect and output a detection signal to the control unit 8.

  When the detection signal is input from the emergency warning signal detection unit 2, the control unit 8 switches the switch of the second input switching unit 3b and the third input switching unit 3c to the emergency warning broadcast receiving device 9 (first input terminal 1a). Switch to the side. That is, as shown in FIG. 2B, in the second input switching unit 3b, the switching switch is switched from the CD player 10 side to the emergency warning broadcast receiving device 9 side, and in the third input switching unit 3c, the switching switch is switched. Is switched from the MD player 11 side to the emergency alert broadcast receiver 9 side.

  As a result, signals from the emergency alert broadcast receiver 9 side from all of the first output unit 4a to the third output unit 4c are transmitted to the bedroom (zone) via the first output terminal 5a to the third output terminal 5c, respectively. The first speaker 14a installed in 1), the second speaker 14b installed in the viewing room (zone 2), and the third speaker 14c installed in the living room.

  Therefore, even when the user is listening to the audio signal reproduced by the CD player or MD player, when the audio signal output device detects the emergency alert signal from the emergency alert broadcast receiver 9, the emergency alert broadcast is automatically received. It switches so that the signal of the apparatus 9 may be output from all the speakers. For this reason, when the emergency alert broadcast is broadcast, the user can surely listen to the emergency alert broadcast.

  In addition, when the audio signal output device detects an emergency warning signal, it automatically switches so that an emergency warning broadcast is output from all speakers. The user can surely listen to the emergency alert broadcast in the room.

  Further, even when the power supply of the audio signal output device is in the standby state, when the emergency warning signal detection unit 2 detects the emergency warning signal, the power source is switched from the standby state to the on state, and the first input switching unit 3a to the third input Since the switching unit 3c is switched, the user can surely listen to the emergency warning broadcast.

  In the embodiment described above, the emergency warning signal detection unit 2 detects the emergency warning signal only from the signal input from the first input terminal 1a to which the emergency warning broadcast receiver 9 is connected. The emergency warning signal may be detected from a signal input from the terminal. For example, when a television receiver or a radio receiver is connected to the audio signal output device in addition to the emergency alert signal receiving device, an input terminal or a radio receiver to which the television receiver is connected is connected. The emergency alarm signal is also detected from the input terminal. This makes it possible to detect an emergency alert signal from a television receiver or a radio receiver when the emergency alert broadcast receiver does not operate normally, and reliably for a plurality of users in different places (rooms). An emergency warning signal can be heard.

  In addition, when the audio signal output device of the present embodiment detects an emergency warning signal, the audio signal output device outputs an emergency warning signal from all speakers connected to the output terminals of the audio signal output device, but other than the television receiver. When a display device such as a monitor is connected to the display device, an emergency warning broadcast video signal may also be output to the display device.

  For example, a television receiver is connected to the first input terminal, a DVD player is connected to the second input terminal, a monitor is connected to the video output terminal, and a video signal reproduced by the DVD player is output from the video output terminal. In some cases, the video reproduced by the DVD player is displayed on the monitor. In this case, when the emergency warning signal detection unit detects the emergency warning signal from the signal input from the television receiver, all the audio signals input by the input switching unit are switched to the television receiver side and output to the video output terminal. The video signal input source is also switched to the television receiver side. Thus, when the emergency alert information is broadcast only with text information, the user viewing the monitor can view the emergency alert broadcast.

  The audio signal output apparatus described above has been described as including a plurality of input terminals and a plurality of output terminals. However, the present invention can be applied to an apparatus having a single input terminal and a plurality of output terminals. The audio signal output device includes an input terminal to which a signal from an external device is input, an output unit that performs signal processing on the audio signal input from the input terminal, and outputs the signal output from the output unit to the outside A first output terminal and a second output terminal, and an input switching unit disposed between the output unit and the first output terminal and the second output terminal. The input switching unit is controlled by the control unit, and performs switching by selecting an output destination (first output terminal, second output terminal) of a signal output from the output unit. The audio signal output unit includes the emergency warning signal detection unit described in the above-described embodiment.

  When the emergency warning signal detection unit detects an emergency warning signal from the signal input from the input terminal in a state where the signal input from the input terminal is output from the first output terminal, the detection signal is output to the control unit. When the detection signal is input, the control unit controls the input switching unit and switches the input switching unit so that the signal output from the output unit is output from the first output terminal and the second output terminal. As a result, a signal input from the input terminal is output from the first output terminal and the second output terminal.

  When the power supply unit of the audio signal output device is in a standby state, the control unit receives a detection signal indicating that an emergency alarm signal has been detected from the emergency alarm signal detection unit, as in the above-described embodiment. The power supply unit is turned on, the input switching unit is controlled, and the input switching unit is switched so that the signal output from the output unit is output from the first output terminal and the second output terminal.

  Thus, even in an audio signal output device having one input terminal and a plurality of output terminals, when an emergency alarm signal is detected from a signal input from the input terminal, the signal input from the input terminal automatically. (Emergency warning signal) is switched to output from all output terminals (speakers). For this reason, when the emergency alert broadcast is broadcast, the user can surely listen to the emergency alert broadcast.

  In addition, when the audio signal output device detects an emergency warning signal, it automatically switches so that an emergency warning broadcast is output from all speakers, so even if the speakers are arranged in different rooms, The user can surely listen to the emergency alert broadcast in the room.

  When the power supply unit of the audio signal output device is in the standby state, when the emergency warning signal detection unit 2 detects the emergency warning signal, the power supply unit is switched from the standby state to the on state, and the input switching unit is switched. Since the signal is output from the output terminal to the outside, the user can surely listen to the emergency warning broadcast.

The block diagram which shows schematic structure of one Embodiment of the audio signal output device of this invention. The figure explaining operation | movement at the time of detecting an emergency warning signal in the audio signal output device of a present Example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1a ... 1st input terminal, 1b ... 2nd input terminal, 1c ... Input terminal, 2 ... Emergency warning signal detection part, 3a ... 1st input switching part, 3b ... 1st 2 input switching unit, 3c ... 3rd input switching unit, 4a ... 1st output unit, 4b ... 2nd output unit, 4c ... 3rd output unit, 5a ... 1st output terminal 5b ... 2nd output terminal, 5c ... 3rd output terminal, 6 ... Operation part, 7 ... Power supply part, 8 ... Control part, 9 ... Emergency warning broadcast receiver, DESCRIPTION OF SYMBOLS 10 ... CD player, 11 ... MD player, 12a ... 1st signal processing part, 12b ... 2nd signal processing part, 12c ... 3rd signal processing part, 13a ... 1st Amplifying unit, 13b ... second amplifying unit, 13c ... third amplifying unit, 14a ... first speaker, 14b ... second speaker, 14c ... third speaker Mosquitoes.

Claims (7)

  In an audio signal output device having an output terminal capable of outputting an audio signal to a plurality of speakers arranged in a plurality of rooms, a signal from a broadcast receiving circuit capable of receiving an emergency warning broadcast is input. A first input unit; a second input unit that inputs a signal from the sound device; a first input switching unit that switches and outputs a signal input from the first input unit and the second input unit; and a second input switching unit. A first output unit that performs signal processing on the signal output from the first input switching unit, amplifies and outputs the signal, and performs signal processing on the signal output from the second input switching unit to output after amplification A second output unit that outputs a signal output from the first output unit, a second output terminal that outputs a signal output from the second output unit, and the first input unit Emergency from signal input from An emergency warning signal detection unit that outputs a detection signal when a broadcast signal is detected, and the first input switching unit are connected to the first input unit, and the second input switching unit is connected to the second input unit. The second input switching unit is connected from the second input unit so that a signal input from the first input unit is output from the second output terminal when a detection signal is input from the emergency warning signal detection unit. An audio signal output device comprising: a control unit that performs control to switch to the first input unit.   In an audio signal output device having an output terminal capable of outputting an audio signal to a plurality of speakers arranged in a plurality of rooms, a signal from a broadcast receiving circuit capable of receiving an emergency warning broadcast is input. A first input unit; a second input unit that inputs a signal from an audio device; a first input switching unit that switches and outputs a signal that is input from the first input unit and the second input unit; A first output unit that performs signal processing on the signal output from the first input switching unit, amplifies and outputs the signal, and performs signal processing on the signal output from the second input switching unit to output after amplification A second output unit that outputs a signal output from the first output unit, a second output terminal that outputs a signal output from the second output unit, and the first input unit Emergency from signal input from An emergency warning signal detection unit that outputs a detection signal when a broadcast signal is detected, a power supply unit that supplies power to the first output unit and the second output unit, and the power supply unit is in a standby state. The first input switching unit is connected to the first input unit, the second input switching unit is connected to the second input unit, and the power supply unit is turned on when a detection signal is input from the emergency warning signal detection unit. A control unit configured to control the switching of the second input switching unit from the second input unit to the first input unit so that a signal input from the first input unit is output from the second output terminal. An audio signal output device.   A first input terminal for inputting a signal from a broadcast receiving apparatus capable of receiving an emergency alert broadcast; a second input terminal for inputting a signal from an apparatus other than the broadcast receiving apparatus; the first input terminal; A first input switching unit and a second input switching unit that switch and output a signal input from the second input terminal, and a signal that is subjected to signal processing on the signal output from the first input switching unit to be amplified and output. An output unit, a second output unit that performs signal processing on the signal output from the second input switching unit, amplifies and outputs the signal, a first output terminal that outputs the signal output from the first output unit, A second output terminal that outputs a signal output from the second output unit; and an emergency warning signal detection unit that outputs a detection signal when an emergency warning broadcast signal is detected from a signal input from the first input terminal; , The first input switching unit is the The second input switching unit is connected to the second input terminal, and a signal input from the first input terminal when the detection signal is input from the emergency warning signal detection unit is connected to the second input terminal. An audio signal output device comprising: a control unit configured to control switching of the second input switching unit from the second input terminal to the first input terminal so as to output from an output terminal.   A first input terminal for inputting a signal from a broadcast receiving apparatus capable of receiving an emergency alert broadcast; a second input terminal for inputting a signal from an apparatus other than the broadcast receiving apparatus; the first input terminal; A first input switching unit and a second input switching unit that switch and output a signal input from the second input terminal, and a signal that is subjected to signal processing on the signal output from the first input switching unit to be amplified and output. An output unit, a second output unit that performs signal processing on the signal output from the second input switching unit, amplifies and outputs the signal, a first output terminal that outputs the signal output from the first output unit, A second output terminal that outputs a signal output from the second output unit; and an emergency warning signal detection unit that outputs a detection signal when an emergency warning broadcast signal is detected from a signal input from the first input terminal; The first output unit and the first output unit. A power supply unit for supplying power to the output unit; the power supply unit is in a standby state; the first input switching unit is connected to the first input terminal; and the second input switching unit is connected to the second input terminal. When the detection signal is input from the emergency warning signal detection unit, the second input switching unit is configured to turn on the power supply unit and output a signal input from the first input terminal from the second output terminal. An audio signal output device comprising: a control unit that controls switching from two input terminals to the first input terminal.   An input terminal for inputting a signal from a broadcast receiving device capable of receiving an emergency warning broadcast, an output unit for performing signal processing on the signal input from the input terminal, amplifying and outputting the signal, and outputting from the output unit An input switching unit that switches the output destination of the signal, a first output terminal and a second output terminal that output the signal output from the input switching unit, and a signal of an emergency warning broadcast from the signal input from the input terminal An emergency warning signal detection unit that outputs a detection signal when the detection signal is output, and a signal that is input from the input terminal when the detection signal is input from the emergency warning signal detection unit is output from the first output terminal and the second output terminal An audio signal output device comprising: a control unit that controls the input switching unit.   An input terminal for receiving a signal from a broadcast receiving device capable of receiving an emergency warning broadcast, an output unit for performing signal processing on the signal input from the input terminal, amplifying and outputting the signal, and outputting from the output unit An input switching unit for switching the output destination of the signal, a first output terminal and a second output terminal for outputting the signal output from the input switching unit to the outside, and an emergency warning broadcast signal from the signal input from the input terminal When an emergency warning signal detection unit that outputs a detection signal when detecting a power supply, a power supply unit that supplies power to the output unit, and when the power supply unit is in a standby state and a detection signal is input from the emergency warning signal detection unit And a control unit that controls the input switching unit to turn on the power supply unit and output a signal input from the input terminal from the first output terminal and the second output terminal. Audio signal output device according to symptoms.   7. The audio signal output device according to claim 1, wherein the emergency warning signal detection unit is an emergency of at least one of analog television broadcasting, radio broadcasting, terrestrial digital television broadcasting, and BS digital broadcasting. An audio signal output device for detecting an emergency alert signal from a signal input from an emergency alert broadcast receiving device for receiving an alert broadcast.

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