JP6149643B2 - Audio processing device - Google Patents

Description

  The present invention relates to an audio processing apparatus that outputs audio signals input from an audio input terminal to a plurality of output units.

  As an audio processing device, for example, an AV amplifier that amplifies an audio signal and outputs it to a speaker is known. The AV amplifier described in Patent Document 1 includes a main output unit that is an audio signal output unit to a main speaker arranged in a main room (first room), and a Zone 2 speaker arranged in a Zone 2 room (second room). A Zone 2 output unit that is an audio signal output unit, a Zone 3 output unit that is an audio signal output unit to a Zone 3 speaker arranged in the Zone 3 room (third room), a plurality of audio input terminals, and a plurality of audio input terminals. A selector that outputs an audio signal selected from the audio signals input from the audio input terminal to the main output unit, the Zone 2 output unit, and the Zone 3 output unit, and a microcomputer that controls each unit constituting the AV amplifier (hereinafter referred to as “microcomputer” And so on). Each of the plurality of output units includes a volume controller that adjusts the volume level of the audio signal, an amplification unit that amplifies the audio signal, and the like.

  Some conventional AV amplifiers have a normal operation mode (normal mode) and a standby mode that consumes less power than the normal mode. In such an AV amplifier, in the normal mode, the microcomputer detects the signal level of the audio signal output to the main output unit. When the functions of the Zone 2 output unit and the Zone 3 output unit are off and the signal level of the audio signal output to the main output unit is less than a predetermined value (for example, zero (silence)) The AV amplifier is shifted from the normal mode to the standby mode. Thereby, when the level of the audio signal of the main output unit is less than a predetermined value, the power consumption of the AV amplifier can be suppressed.

JP 2013-046265 A

  In the conventional AV amplifier, when the signal level of the audio signal output to the main output unit is less than a predetermined value, it is possible to shift to the standby mode and suppress power consumption. There is a problem that the power consumption of the AV amplifier cannot be suppressed when the level of the audio signal of the other output unit is less than a predetermined value.

  An object of the present invention is to make it possible to suppress the power consumption of an apparatus even when the signal level of an audio signal of an output unit other than the main output unit is less than a predetermined value.

  According to a first aspect of the present invention, there is provided an audio processing device comprising: a plurality of audio input terminals to which audio signals are respectively input; a first output unit and a second output unit to which audio signals input from the plurality of audio input terminals are output; A receiving unit that accepts a selection of an output unit that outputs audio signals input from the plurality of audio input terminals, and a first output unit that connects any of the plurality of audio input terminals to the first output unit. A connection unit; a second connection unit that connects any one of the plurality of audio input terminals to the second output unit; a first detection unit that is connected to the first output unit and detects a signal level of the audio signal; The control unit controls the first connection unit and the second connection unit based on the selection received by the reception unit, and controls the supply of power supply voltage to the first output unit and the second output unit. A speech processing apparatus comprising: The control unit is connected to the second output unit by the first connection unit when the function of the first output unit is off and the function of the second output unit is on. An audio input terminal and the first output unit are connected, and when the signal level of the audio signal detected by the first detection unit is less than a predetermined value, the supply of the power supply voltage to the second output unit is cut off. It is characterized by that.

  In the present invention, the control unit is configured such that when the function of the first output unit is off and the function of the second output unit is on, the audio connected to the second output unit by the first connection unit. The input terminal and the first output unit are connected. At this time, the control unit cuts off the supply of the power supply voltage to the second output unit when the signal level of the audio signal detected by the first detection unit is less than a predetermined value. Thereby, even when the signal level of the audio signal of the second output unit other than the first output unit which is the main output unit is less than a predetermined value, the power consumption of the apparatus can be suppressed.

  In addition, since the signal level of the audio signal output to the second output unit is detected using the first detection unit that is connected to the first output unit and detects the signal level of the audio signal, There is no need to provide means for detecting the signal level of the audio signal output to the second output unit.

  According to a second aspect of the present invention, there is provided a speech processing apparatus according to the first aspect, wherein any one of the third output unit that outputs the speech signals input from the plurality of speech input terminals and the plurality of speech input terminals. And a third connection unit that connects the third output unit, and the control unit further controls the third connection unit based on a selection received by the reception unit, and The power supply voltage supply to the third output unit is controlled, and the function of the first output unit is off and the function of the second output unit and the third output unit is on. In this case, the voice input terminal connected to the second output unit, the first output unit, and the voice input terminal connected to the third output unit and the first connector are connected by the first connection unit. 1 output part is switched and connected, and the first connection part is the second output. The second output is connected when the audio input terminal connected to the first output unit is connected to the first output unit, and the signal level of the audio signal detected by the first detection unit is less than a predetermined value. The supply of the power supply voltage to the unit is cut off, the first connection unit connects the audio input terminal connected to the third output unit and the first output unit, and the first detection The power supply voltage supply to the third output unit is cut off when the signal level of the audio signal detected by the unit is less than a predetermined value.

  In the present invention, the first connection unit connects the audio input terminal connected to the third output unit and the first output unit, and the signal level of the audio signal detected by the first detection unit is a predetermined value. When it is less, the control unit cuts off the supply of the power supply voltage to the third output unit. Thereby, in addition to the 2nd output part, also when the signal level of the audio signal of the 3rd output part is less than a predetermined value, the power consumption of an apparatus can be controlled.

  According to a third aspect of the present invention, there is provided the speech processing apparatus according to the second aspect, wherein a sum of signal levels of the speech signals output to the first output unit, the second output unit, and the third output unit is calculated. A second detection unit for detecting, wherein the control unit is configured such that the total value detected by the second detection unit is less than a predetermined value, the function of the first output unit is off, and the first When the functions of the second output unit and the third output unit are on, the voice input terminal connected to the second output unit, the first output unit, and the first connection unit are connected by the first connection unit. The voice input terminal connected to the three output units and the first output unit are switched and connected.

  When the first connection unit switches and connects the audio input terminal and the first output unit connected to the second output unit, and the audio input terminal and the first output unit connected to the third output unit, There is a possibility that the signal levels of the audio signals of the second output unit and the third output unit are erroneously detected due to an error in the switching timing. In the present invention, the control unit detects that the detected signal level is predetermined only when the total value of the signal levels of the audio signals output to the first output unit, the second output unit, and the third output unit is less than a predetermined value. Since it is determined whether or not the value is less than the value, occurrence of a problem of determining whether or not the signal level is less than the predetermined value based on the signal level detected in error is suppressed.

  According to a fourth aspect of the present invention, there is provided the speech processing apparatus according to the first aspect, wherein the control unit further includes a normal mode including a power supply voltage being supplied to the first output unit; Controlling the device itself to a standby mode that consumes less power than the normal mode, including the supply of power supply voltage to the output unit and the second output unit being cut off, and the control unit If the function of one output unit is off, the function of the second output unit is on, and the signal level of the audio signal detected by the first detection unit is less than a predetermined value, It is characterized by being in standby mode.

  In the present invention, when the signal level of the audio signal of the second output unit other than the first output unit which is the main output unit is less than a predetermined value, the control unit shifts its own device to the standby mode. Compared with the case where only the supply of the power supply voltage to is interrupted, the power consumption of the apparatus can be further suppressed.

  In the present invention, the control unit is configured such that when the function of the first output unit is off and the function of the second output unit is on, the audio connected to the second output unit by the first connection unit. The input terminal and the first output unit are connected. At this time, the control unit cuts off the supply of the power supply voltage to the second output unit when the signal level of the audio signal detected by the first detection unit is less than a predetermined value. Thereby, even when the signal level of the audio signal of the second output unit other than the first output unit which is the main output unit is less than a predetermined value, the power consumption of the apparatus can be suppressed.

1 is a block diagram showing a configuration of an AV amplifier according to an embodiment of the present invention. It is a block diagram which shows the internal structure etc. of a selector. It is a figure which shows an example of operation | movement of a selector. It is a figure which shows an example of operation | movement of a selector. 6 is a flowchart showing processing operations of the AV amplifier when shifting from a normal mode to a standby mode. It is a flowchart which shows the processing operation of AV amplifier in the case of turning off the function of a main output part, Zone2 output part, and Zone3 output part. It is a flowchart which shows the processing operation of AV amplifier in the case of turning off the function of a main output part, Zone2 output part, and Zone3 output part. It is a flowchart which shows the processing operation of AV amplifier in the case of turning off the function of a main output part, Zone2 output part, and Zone3 output part. It is a flowchart which shows the processing operation of AV amplifier in the case of turning off the function of a main output part, Zone2 output part, and Zone3 output part.

  Hereinafter, embodiments of the present invention will be described. FIG. 1 is a block diagram showing a configuration of an AV amplifier 1 (audio processing apparatus) according to the present embodiment. The AV amplifier 1 is connected to, for example, a DVD player 100a, a CD player 100b, a TV receiver 100c, and a BD (Blu-ray disc) player 100d, which are content playback devices. The AV amplifier 1 is connected to the main speaker 200a, the Zone2 speaker 200b, and the Zone3 speaker 200c. The AV amplifier 1, the DVD player 100a, the CD player 100b, the TV receiver 100c, and the BD player 100d are arranged in the main room. The Zone 2 speaker 200b is disposed in the Zone 2 room, which is a room different from the main room. The Zone 3 speaker 200c is arranged in the Zone 3 room, which is a separate room from the main room. The AV amplifier 1 amplifies an audio signal input from a DVD player 100a or the like arranged in the main room, and the amplified audio signal is a main speaker 200a arranged in the main room or a Zone 2 speaker arranged in the Zone 2 room. 200b has a function of outputting to the Zone 3 speaker 200c arranged in the Zone 3 room.

  The main speaker 200a is, for example, 5.1 channels (front left audio signal FL, front right audio signal FR, center audio signal C, surround left audio signal SL, surround right audio signal SR, subwoofer audio signal SW) or 7. Includes speakers for one channel. Each of the Zone2 speaker 200b and the Zone3 speaker 200c includes, for example, speakers for two channels (a front left audio signal FL and a front right audio signal FR).

  Hereinafter, the AV amplifier 1 will be described in detail. The AV amplifier 1 can output an input video signal to a display (not shown) in addition to an audio signal, but only the configuration for outputting the input audio signal to the speaker 200 for simplicity of explanation. Will be described. As shown in FIG. 1, the AV amplifier 1 includes a microcomputer 2, a display unit 3, an operation unit 4, analog audio input terminals 5 (5 a to 5 c), a digital audio input terminal 6, a main output unit 7, and a Zone 2 output unit 8. , A Zone3 output unit 9, an analog audio output terminal 10 (10a to 10c), a selector 11, an A / D converter 12, a DSP 13, a D / A converter 14, and the like.

  The microcomputer 2 (hereinafter referred to as “microcomputer”) includes hardware such as a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and an input / output interface. The CPU controls the hardware constituting the microcomputer 2 so as to function as each functional unit of the control unit 23 and the like (see FIG. 2) according to a program stored in the ROM. Note that each functional unit such as the control unit 23 may be configured by an electronic circuit or the like specialized for arithmetic processing in each functional unit, or may be other configurations. Details of the microcomputer 2 will be described later.

  The display unit 3 displays a setting screen, a volume level, and the like, and is an LCD (liquid crystal display), a fluorescent display tube, or the like. The operation unit 4 is for accepting a user operation, and is an operation button or a remote controller provided on the housing of the AV amplifier 1. The user operates the operation unit 4 so that audio signals input from the DVD player 100a, the CD player 100b, the television receiver 100c, and the BD player 100d are transmitted to any of the main speaker 200a, the Zone2 speaker 200b, and the Zone3 speaker 200c. It is possible to instruct the AV amplifier 1 to output.

  A DVD player 100a, a CD player 100b, and a TV receiver 100c are connected to the analog audio input terminals 5a to 5c, respectively, and an analog audio signal output from the connected content reproduction device is input. The digital audio input terminal 6 is connected to a BD player 100d, and receives a digital audio signal output from the BD player 100d. Note that the number of analog audio input terminals 5 and digital audio input terminals 6 included in the AV amplifier 1 is not limited to the numbers exemplified in this embodiment.

  The main output unit 7 (first output unit), the Zone 2 output unit 8 (second output unit), and the Zone 3 output unit 9 (third output unit) have analog audio signals and digital audio output from the analog audio input terminal 5. An analog audio signal input from the input terminal 6 and D / A converted is output. The main output unit 7 includes a volume controller 71 that adjusts the signal level of the analog audio signal, and an amplification unit 72 that amplifies the analog audio signal. Similarly, the Zone 2 output unit 8 includes a volume controller 81 and an amplification unit 82, and the Zone 3 output unit 9 includes a volume controller 91 and an amplification unit 92. An analog audio output terminal 10a is connected to the main output unit 7, and an analog audio signal amplified by the main output unit 7 is output to the main speaker 200a via the analog audio output terminal 10a. An analog audio output terminal 10b is connected to the Zone2 output unit 8, and an analog audio signal amplified by the Zone2 output unit 8 is output to the Zone2 speaker 200b via the analog audio output terminal 10b. An analog audio output terminal 10c is connected to the Zone3 output unit 9, and an analog audio signal amplified by the Zone3 output unit 9 is output to the Zone3 speaker 200c via the analog audio output terminal 10c.

  In accordance with an instruction from the control unit 23 of the microcomputer 2 to be described later, the selector 11 includes analog audio input terminals 5a to 5c (DVD player 100a, CD player 100b, TV receiver 100c), digital audio input terminal 6 (BD player), The main output unit 7, the Zone2 output unit 8, and the Zone3 output unit 9 are connected. FIG. 2 is a block diagram showing an internal configuration of the selector 11 and the like. The selector 11 includes a main output unit switch 15 (15a, 15b, 15c) (first connection unit), a Zone2 output unit switch 16 (16a, 16b, 16c) (second connection unit), and a Zone3 output unit switch 17. (17a, 17b, 17c) (third connection portion). In addition, description about the connection between the digital audio input terminal 6, the main output unit 7, the Zone2 output unit 8, and the Zone3 output unit 9 is omitted here.

  The main output unit switch 15 connects one of the analog audio input terminals 5 to the main output unit 7. For example, when the analog audio input terminal 5a and the main output unit 7 are connected in accordance with an instruction from the control unit 23, the main output unit switch 15a is turned on and the other main output unit switches 15b and 15c are turned off. . The Zone 2 output unit switch 16 connects any one of the analog audio input terminals 5 to the Zone 2 output unit 8. For example, when the analog audio input terminal 5b and the Zone2 output unit 8 are connected in accordance with an instruction from the control unit 23, the Zone2 output unit switch 16b is turned on, and the other Zone2 output unit switches 16a and 16c are turned off. . The Zone 3 output unit switch 17 connects any one of the analog audio input terminals 5 and the Zone 3 output unit 9. For example, when the analog audio input terminal 5c and the Zone 3 output unit 9 are connected in accordance with an instruction from the control unit 23, the Zone 3 output unit switch 17c is turned on, and the other Zone 3 output unit switches 17a and 17b are turned off. .

  The A / D converter 12 is connected to the main output unit 7 via the selector 11, that is, by being connected to the signal line to the main output unit 7 of the selector 11, and is output to the main output unit 7. A / D conversion of the analog audio signal to be converted into a digital audio signal. Then, the A / D converter 12 outputs the A / D converted digital audio signal to the DSP 13. The A / D converter 12 may be connected to the main output unit 7 without using the selector 11. A DSP (Digital Signal Processor) 13 (first detection unit) is connected to the main output unit 7 via the A / D converter 12 and detects the signal level of the digital audio signal output from the A / D converter 12. To do. The DSP 13 executes sound field processing and the like on the digital audio signal input from the digital audio signal input terminal 6. The D / A converter 14 D / A converts the digital audio signal that has been subjected to sound field processing and the like by the DSP 13 into an analog audio signal.

  Next, the microcomputer 2 will be described. As shown in FIG. 2, the microcomputer 2 functions as a reception unit 21, a detection unit 22 (second detection unit), and a control unit 23. The reception unit 21 receives selection of which output units 7 to 9 to output the analog audio signal input from the analog audio input terminal 5 based on the operation of the operation unit 4 by the user. The receiving unit 21 receives selection of which output unit 7 to 9 is turned on or off based on the operation of the operation unit 4 by the user. In the present embodiment, “the function of the output unit is on” means that the function of the output unit is used. On the other hand, “the function of the output unit is off” means a setting that does not use the function of the output unit.

  The detection unit 22 detects the total value of the signal levels of the analog audio signals output to the main output unit 7, the Zone 2 output unit 8, and the Zone 3 output unit 9. Here, the signal levels of the analog audio signals output to the main output unit 7, the Zone 2 output unit 8, and the Zone 3 output unit 9 are added and supplied to the A / D port of the microcomputer 2. The detection unit 22 performs A / D conversion on the analog audio signal supplied to the A / D port and detects the signal level.

  The control unit 23 controls the main output unit switch 15, the Zone 2 output unit switch 16, and the Zone 3 output unit switch 17 based on the selection received by the reception unit 21. For example, when the reception unit 21 receives a selection of outputting an analog audio signal input from the analog audio input terminal 5a (DVD player 100a) to the main output unit 7, the control unit 23 uses the main output unit switch 15a. The analog audio input terminal 5a and the main output unit 7 are connected. The control unit 23 controls the functions of the main output unit 7, the Zone 2 output unit 8, and the Zone 3 output unit 9 to be turned on or off based on the selection received by the receiving unit 21. Specifically, the control unit 23 stores settings for turning on or off the functions of the main output unit 7, the Zone 2 output unit 8, and the Zone 3 output unit 9, and the selection received by the reception unit 21. Based on the above, the settings of the output units 7 to 9 are rewritten from on to off or from off to on. For example, when the reception unit 21 receives a selection to turn on the function of the Zone2 output unit 8 from off, the control unit 23 rewrites the setting of the Zone2 output unit 8 from off to on. For example, when the reception unit 21 receives a selection of turning on or off the function of the Zone2 output unit 8, the setting of the Zone2 output unit 8 is rewritten from on to off.

  Here, in this embodiment, a circuit for supplying a power supply voltage to the main output unit 7, the Zone 2 output unit 8, and the Zone 3 output unit 9 is shared. For example, there are two circuits for supplying power supply voltage: a circuit for supplying power supply voltage to the microcomputer 2 and its peripheral circuits, and a circuit for supplying power supply voltage to other components. And a standby mode in which the power supply voltage is supplied to the peripheral circuits, and a normal mode in which the power supply voltage is supplied to each part of the AV amplifier 1. In the normal mode, the power supply voltage is supplied to all of the main output unit 7, the Zone 2 output unit 8, and the Zone 3 output unit 9. In the standby mode, the power supply voltage is not supplied to all of the main output unit 7, the Zone 2 output unit 8, and the Zone 3 output unit 9. The standby mode consumes less power than the normal mode. The control unit 23 controls the AV amplifier 1 into a normal mode and a standby mode.

  The control unit 23 controls the function of the main output unit 7 from on to off when the function of the main output unit 7 is on but no analog audio signal is output to the main output unit 7. . As described above, the A / D converter 12 and the DSP 13 are connected to the main output unit 7. The A / D converter 12 performs A / D conversion on the analog audio signal output to the main output unit 7, and outputs the A / D converted digital audio signal to the DSP 13. The DSP 13 detects the signal level of the digital audio signal and outputs it to the control unit 23. The control unit 23 outputs an analog audio signal to the main output unit 7 when the signal level of the digital audio signal output from the DSP 13 is less than a predetermined value (for example, zero) over a predetermined time (for example, 60 seconds). The function of the main output unit 7 is turned off from on.

  In addition, when the total value of the signal levels detected by the detection unit 22 is equal to or greater than a predetermined value, the control unit 23 reduces the power supply voltage supplied to the main output unit 7, the Zone 2 output unit 8, and the Zone 3 output unit 9 from a high voltage to a low voltage. Switch to voltage. As a result, the signal level (amplitude value) of the analog audio signal from the amplification units 72, 82, and 92 becomes extremely large, and the amplification units 72, 82, and 92 may be damaged due to reasons such as heat, overvoltage, or overcurrent. Is prevented.

  A conventional AV amplifier uses an A / D converter and a DSP connected to the main output unit, and when the function of the main output unit is on and no analog audio signal is output to the main output unit, It has a function of cutting off the supply of power supply voltage to the main output section. However, in the conventional AV amplifier, when the functions of the Zone 2 output unit and the Zone 3 output unit are on, and an analog audio signal is not output to the Zone 2 output unit and the Zone 3 output unit, the Zone 2 output unit and the Zone 3 output unit It does not have a function to cut off the supply of power supply voltage to. Therefore, the AV amplifier 1 of the present embodiment has a configuration for cutting off the supply of the power supply voltage to the Zone 2 output unit 8 and the Zone 3 output unit 9. Hereinafter, the configuration will be described.

  The control unit 23 is connected to the Zone 2 output unit 8 by the main output unit switch 15 when the function of the main output unit 7 is off, the function of the Zone 2 output unit 8 is on, and the function of the Zone 3 output unit 9 is off. The analog audio input terminal 5 and the main output unit 7 are connected. For example, as shown in FIG. 3, when the analog audio input terminal 5a and the Zone 2 output unit 8 are connected by the Zone 2 output unit switch 16a, the control unit 23 turns on the main output unit switch 15a, The analog output terminal 5a connected to the Zone 2 output unit 8 and the main output unit 7 are connected by the main output unit switch 15a. As a result, the analog audio signal output to the Zone 2 output unit 8 is output to the main output unit 7, so that the A / D converter 12 connected to the main output unit 7 is also input to the Zone 2 output unit 8. The analog audio signal is output. Then, the A / D converter 12 performs A / D conversion on the analog audio signal, and outputs the A / D converted digital audio signal to the DSP 13. The DSP 13 detects the signal level of the digital audio signal and outputs it to the control unit 23. The control unit 23 outputs an analog audio signal to the Zone 2 output unit 8 when the signal level of the digital audio signal output from the DSP 13 is less than a predetermined value (for example, zero) over a predetermined time (for example, 60 seconds). The function of the Zone 2 output unit 8 is turned off from on. At this time, since the functions of all the output units 7 to 9 are turned off, the control unit 23 shifts the AV amplifier 1 from the normal mode to the standby mode.

  Further, the control unit 23 causes the main output unit switch 15 to switch the Zone 3 output unit 9 when the function of the main output unit 7 is off, the function of the Zone 2 output unit 8 is off, and the function of the Zone 3 output unit 9 is on. The analog audio input terminal 5 connected to the main output unit 7 is connected. For example, when the analog audio input terminal 5b and the Zone 3 output unit 9 are connected by the Zone 3 output unit switch 17b, the control unit 23 turns on the main output unit switch 15b and the main output unit switch 15b. The analog audio input terminal 5b connected to the Zone3 output unit 9 and the main output unit 7 are connected. And if the control part 23 judges that the analog audio | voice signal is not output to the Zone3 output part 9 similarly to the above, it will switch the function of the Zone3 output part 9 from ON to OFF. At this time, since the functions of all the output units 7 to 9 are turned off, the control unit 23 shifts the AV amplifier 1 from the normal mode to the standby mode.

  Further, the control unit 23 causes the main output unit switch 15 to switch the Zone 2 output unit 8 when the function of the main output unit 7 is off, the function of the Zone 2 output unit 8 is on, and the function of the Zone 3 output unit 9 is on. The analog audio input terminal 5 connected to the main output unit 7 and the analog audio input terminal 5 connected to the Zone 3 output unit 9 and the main output unit 7 are switched and connected. For example, as shown in FIG. 4, the analog audio input terminal 5b and the Zone2 output unit 8 are connected by the Zone2 output unit switch 16b, and the analog audio input terminal 5c and the Zone3 output unit 9 are connected by the Zone3 output unit switch 17c. Are connected, first, the analog output terminal 5b connected to the Zone 2 output unit 8 and the main output unit 7 are connected by the main output unit switch 15b. Next, the control unit 23 determines whether or not an analog audio signal is output to the Zone 2 output unit 8 as described above. When the control unit 23 determines that no analog audio signal is output to the Zone 2 output unit 8 and turns off the function of the Zone 2 output unit 8, the main output unit switch 15c then connects to the Zone 3 output unit 9. The connected analog audio input terminal 5c and the main output unit 7 are connected. And the control part 23 judges whether the analog audio | voice signal is output to the Zone3 output part 9 as mentioned above. If the control unit 23 determines that an analog audio signal is not output to the Zone 3 output unit 9 as described above, the control unit 23 switches the function of the Zone 3 output unit 9 from on to off. At this time, since the functions of all the output units 7 to 9 are turned off, the control unit 23 shifts the AV amplifier 1 from the normal mode to the standby mode.

  Thus, the control unit 23 shifts the AV amplifier 1 from the normal mode to the standby mode when the functions of all the output units 7 to 9 are off. That is, the control unit 23 cuts off the supply of the power supply voltage to each unit constituting the AV amplifier 1 including the output units 7 to 9 except the microcomputer 2 and its peripheral circuits, and changes the AV amplifier 1 from the normal mode to the standby mode. To do.

  Next, the processing operation of the AV amplifier when shifting from the normal mode to the standby mode will be described based on the flowchart shown in FIG. Here, the case where the functions of all the output units 7 to 9 are on will be described. First, the control unit 23 determines whether the total value of the signal levels of the analog audio signals output to the main output unit 7, the Zone 2 output unit 8, and the Zone 3 output unit 9 detected by the detection unit 22 is less than a predetermined value. It is determined whether or not (S1). When the control unit 23 determines that the total value of the signal levels of the analog audio signals output to the main output unit 7, the Zone 2 output unit 8, and the Zone 3 output unit 9 is not less than a predetermined value, that is, greater than or equal to a predetermined value ( S1: No), the process of S1 is repeatedly executed. When the control unit 23 determines that the total value of the signal levels of the analog audio signals output to the main output unit 7, the Zone2 output unit 8, and the Zone3 output unit 9 is less than a predetermined value (S1: Yes), the main output In order to determine whether an analog audio signal is output to the unit 7, it is determined whether the signal level detected by the DSP 13 is less than a predetermined value (S2). When the control unit 23 determines that the signal level detected by the DSP 13 is not less than the predetermined value, that is, greater than or equal to the predetermined value (S2: No), the control unit 23 executes the process of S1.

  When it is determined that the signal level detected by the DSP 13 is less than the predetermined value (S2: Yes), the control unit 23 determines whether or not a predetermined time has passed while the signal level is less than the predetermined value. (S3). When it is determined that the predetermined time has not elapsed while the signal level is less than the predetermined value (S3: No), the control unit 23 executes the process of S2. Then, the control unit 23 repeatedly executes the processes of S2 and S3 until it is determined that the predetermined time has passed with the signal level being less than the predetermined value (S3: Yes). When the control unit 23 determines that the predetermined time has elapsed while the signal level is less than the predetermined value (S3: Yes), the control unit 23 determines that the analog audio signal is not output to the main output unit 7, and the main output The function of the unit 7 is turned off from on (S4).

  Next, the control unit 23 determines whether or not an analog audio signal is output to the Zone 2 output unit 8, and the analog audio input terminal 5 connected to the Zone 2 output unit 8 by the main output unit switch 15. Are connected to the main output unit 7 (S5). Next, the control unit 23 determines whether or not the signal level detected by the DSP 13 is less than a predetermined value (S6). When the control unit 23 determines that the signal level detected by the DSP 13 is not less than the predetermined value, that is, greater than or equal to the predetermined value (S6: No), the control unit 23 executes the process of S1.

  When it is determined that the signal level detected by the DSP 13 is less than the predetermined value (S6: Yes), the control unit 23 determines whether or not a predetermined time has passed while the signal level is less than the predetermined value. (S7). When the control unit 23 determines that the predetermined time has not elapsed while the signal level is less than the predetermined value (S7: No), the control unit 23 executes the process of S6. Then, the control unit 23 repeatedly executes the processes of S6 and S7 until it is determined that the predetermined time has elapsed while the signal level is less than the predetermined value (S7: Yes). When the control unit 23 determines that the predetermined time has elapsed while the signal level is less than the predetermined value (S7: Yes), the control unit 23 determines that no analog audio signal is output to the Zone 2 output unit 8, and outputs the Zone 2 output. The function of the unit 8 is turned off from on (S8).

  Next, the control unit 23 determines whether or not an analog audio signal is output to the Zone 3 output unit 9, and the analog audio input terminal 5 connected to the Zone 3 output unit 9 by the main output unit switch 15. Are connected to the main output unit 7 (S9). Next, the control unit 23 determines whether or not the signal level detected by the DSP 13 is less than a predetermined value (S10). When the control unit 23 determines that the signal level detected by the DSP 13 is not less than the predetermined value, that is, is equal to or higher than the predetermined value (S10: No), the control unit 23 executes the process of S1.

  When it is determined that the signal level detected by the DSP 13 is less than the predetermined value (S10: Yes), the control unit 23 determines whether or not a predetermined time has passed while the signal level is less than the predetermined value. (S11). When it is determined that the predetermined time has not elapsed while the signal level is less than the predetermined value (S11: No), the control unit 23 executes the process of S10. Then, the control unit 23 repeatedly executes the processes of S10 and S11 until it is determined that a predetermined time has elapsed with the signal level being less than the predetermined value (S11: Yes). When the control unit 23 determines that the predetermined time has passed while the signal level is less than the predetermined value (S11: Yes), the control unit 23 determines that no analog audio signal is output to the Zone 3 output unit 9, and outputs the Zone 3 output. The function of the unit 9 is turned off from on (S12). The control unit 23 shifts the AV amplifier 1 from the normal mode to the standby mode because the functions of all the output units 7 to 9 are off (S13).

  As described above, in this embodiment, the control unit 23 turns off the function of the main output unit 7 and then the analog audio input terminal 5 connected to the Zone 2 output unit 8 by the main output unit switch 15. Are connected to the main output unit 7. At this time, the control unit 23 turns off the function of the Zone 2 output unit 8 when the signal level of the audio signal detected by the DSP 13 is less than a predetermined value. Further, after turning off the function of the Zone 2 output unit 8, the main output unit switch 15 connects the analog audio input terminal 5 connected to the Zone 3 output unit 9 to the main output unit 7. At this time, the control unit 23 turns off the function of the Zone 3 output unit 9 when the signal level of the audio signal detected by the DSP 13 is less than a predetermined value. Then, after turning off the functions of all the output units 7 to 9, that is, when the signal level of the audio signal detected by the DSP 13 is less than a predetermined value, the control unit 23 moves to each unit including the Zone 2 output unit 8. Shut off the power supply. Thereby, even when the signal level of the audio signal of the Zone 2 output unit 8 other than the main output unit 7 is less than a predetermined value, the power consumption of the AV amplifier 1 can be suppressed.

  In the present embodiment, the signal level of the audio signal output to the Zone 2 output unit 8 and the Zone 3 output unit 9 is detected using the DSP 13 that is connected to the main output unit 7 and detects the signal level of the audio signal. Therefore, it is not necessary to provide means for detecting the signal level of the audio signal newly output to the Zone 2 output unit 8 and the Zone 3 output unit 9.

  In this embodiment, the main output unit switch 15 is connected to the analog audio input terminal 5 connected to the Zone 2 output unit 8, the main output unit 7, and the analog audio input terminal connected to the Zone 3 output unit 9. 5 and the main output unit 7 are switched and connected. In such a case, there is a possibility that the signal levels of the audio signals of the Zone 2 output unit 8 and the Zone 3 output unit 9 are erroneously detected due to an error in switching timing. In this embodiment, only when the total value of the signal levels of the audio signals output to the main output unit 7, the Zone2 output unit 8, and the Zone3 output unit 9 is less than a predetermined value (S1: Yes), the control unit 23 is In order to determine whether or not the detected signal level is less than a predetermined value, there is a problem in that it is determined whether or not the signal level is less than a predetermined value based on the signal level detected in error. It is suppressed.

  In the present embodiment, the control unit 23 shifts the AV amplifier 1 to the standby mode when the signal levels of the audio signals of the Zone 2 output unit 8 and the Zone 3 output unit 9 other than the main output unit 7 are less than a predetermined value. Therefore, for example, the power consumption of the AV amplifier 1 can be further suppressed as compared with the case where only the supply of the power supply voltage to the output unit is cut off.

  As mentioned above, although embodiment of this invention was described, the form which can apply this invention is not restricted to the above-mentioned embodiment, As suitably illustrated in the range which does not deviate from the meaning of this invention so that it may illustrate below. It is possible to make changes.

  In the above-described embodiment, there are two circuits that supply the power supply voltage: a circuit that supplies the power supply voltage to the microcomputer 2 and its peripheral circuits, and a circuit that supplies the power supply voltage to the other units. A circuit for supplying a power supply voltage to the unit 7, the Zone2 output unit 8, and the Zone3 output unit 9 is shared. The AV amplifier 1 is not limited to this, and the power supply voltage may be individually supplied to the main output unit 7, the Zone 2 output unit 8, and the Zone 3 output unit 9. In the above-described embodiment, the state in which the function of the output unit is on is set to use the function of the output unit, and the state in which the function of the output unit is off is set in the output unit. This is a setting that does not use the function. Not limited to this, as described above, when the power supply voltage can be individually supplied to the main output unit 7, the Zone 2 output unit 8, and the Zone 3 output unit 9, the “output unit function is on” state is output. The power supply voltage may be supplied to the unit, and the amplifier unit and the volume controller may be operable. Further, the state where the function of the output unit is OFF may be a state where the supply of the power supply voltage to the output unit is cut off and the amplification unit and the volume controller are inoperable.

  In this modification, the control unit 23 supplies the main output unit 7, the Zone 2 output unit 8, and the Zone 3 output unit 9 with the power supply voltage or cuts off the supply of the power supply voltage to thereby output the main output unit 7 and the Zone 2 output. The function of the unit 8 and the Zone 3 output unit 9 is controlled to be on or off. Therefore, in this modified example, “turning on or off the function of the output unit” and “supplying power supply voltage to the output unit or shutting off supply of power supply voltage” are synonymous. Hereinafter, the processing operation of the AV amplifier 1 when the functions of the main output unit 7, the Zone2 output unit 8, and the Zone3 output unit 9 are turned off will be described based on the flowcharts shown in FIGS. First, the control unit 23 determines whether the total value of the signal levels of the analog audio signals output to the main output unit 7, the Zone 2 output unit 8, and the Zone 3 output unit 9 detected by the detection unit 22 is less than a predetermined value. It is determined whether or not (S101). When the control unit 23 determines that the total value of the signal levels of the analog audio signals output to the main output unit 7, the Zone 2 output unit 8, and the Zone 3 output unit 9 is not less than a predetermined value, that is, greater than or equal to a predetermined value ( S101: No), the process of S101 is repeatedly executed. When the total value of the signal levels of the analog audio signals output to the main output unit 7, the Zone2 output unit 8, and the Zone3 output unit 9 is equal to or greater than a predetermined value, the main output unit 7, the Zone2 output unit 8, and the Zone3 output unit 9 Since the analog audio signal is output to the main output unit 7, the function of turning off the functions of the main output unit 7, the zone 2 output unit 8, and the zone 3 output unit 9 is executed. 7. Since the functions of the Zone 2 output unit 8 and the Zone 3 output unit 9 may be turned off, no processing is performed.

  When the control unit 23 determines that the total value of the signal levels of the analog audio signals output to the main output unit 7, the Zone2 output unit 8, and the Zone3 output unit 9 is less than a predetermined value (S101: Yes), the main output It is determined whether or not the function of the unit 7 is on (S102). When it is determined that the function of the main output unit 7 is on (S102: Yes), the control unit 23 determines whether the signal level detected by the DSP 13 is less than a predetermined value (S103). When the control unit 23 determines that the signal level detected by the DSP 13 is not less than the predetermined value, that is, is equal to or higher than the predetermined value (S103: No), the control unit 23 executes the process of S101.

  When it is determined that the signal level detected by the DSP 13 is less than the predetermined value (S103: Yes), the control unit 23 determines whether or not a predetermined time has passed while the signal level is less than the predetermined value. (S104). When it is determined that the predetermined time has not elapsed while the signal level is less than the predetermined value (S104: No), the control unit 23 executes the process of S103. Then, the control unit 23 repeatedly executes the processes of S103 and S104 until it is determined that the predetermined time has elapsed while the signal level is less than the predetermined value (S104: Yes). If the control unit 23 determines that the predetermined time has elapsed while the signal level is less than the predetermined value (S104: Yes), the control unit 23 determines that the analog audio signal is not output to the main output unit 7, and the main output The function of the unit 7 is turned off (S105).

  When the control unit 23 determines that the function of the main output unit 7 is not on, that is, is off (S102: No), or after executing the process of S105, the function of the Zone2 output unit 8 is on. Whether or not (S106). When it is determined that the function of the Zone 2 output unit 8 is not on, that is, the control unit 23 is off (S106: No), the control unit 23 determines whether or not the function of the Zone 3 output unit 9 is on (S107). When the control unit 23 determines that the function of the Zone 3 output unit 9 is not on, that is, is off (S107: No), the functions of the main output unit 7, the Zone 2 output unit 8, and the Zone 3 output unit 9 are all off. Therefore, the process is terminated.

  When the control unit 23 determines that the function of the Zone 3 output unit 9 is on (S107: Yes), the function of only the Zone 3 output unit 9 is on, so the main output unit switch 15 causes the Zone 3 output unit 9 to be turned on. The analog audio input terminal 5 connected to the main output unit 7 is connected (S108). Next, the control unit 23 determines whether or not the signal level detected by the DSP 13 is less than a predetermined value (S109). When the control unit 23 determines that the signal level detected by the DSP 13 is not less than the predetermined value, that is, greater than or equal to the predetermined value (S109: No), the control unit 23 executes the process of S101. When the control unit 23 determines that the signal level detected by the DSP 13 is less than the predetermined value (S109: Yes), the control unit 23 determines whether or not a predetermined time has passed while the signal level is less than the predetermined value. (S110). When the control unit 23 determines that the predetermined time has not elapsed while the signal level is less than the predetermined value (S110: No), the control unit 23 executes the process of S109. Then, the control unit 23 repeatedly executes the processes of S109 and S110 until it is determined that the predetermined time has elapsed while the signal level is less than the predetermined value (S110: Yes). When the control unit 23 determines that the predetermined time has elapsed while the signal level is less than the predetermined value (S110: Yes), the control unit 23 determines that the analog audio signal is not output to the Zone3 output unit 9, and outputs the Zone3 output. The function of the unit 9 is turned off (S111), and the process is terminated.

  When the control unit 23 determines that the function of the Zone 2 output unit 8 is on (S106: Yes), the control unit 23 determines whether the function of the Zone 3 output unit 9 is on (S112). When the control unit 23 determines that the function of the Zone 3 output unit 9 is not on, that is, is off (S112: No), the function of only the Zone 2 output unit 8 is on, so the main output unit switch 15 The analog audio input terminal 5 connected to the Zone 2 output unit 8 and the main output unit 7 are connected (S113). Next, the control unit 23 determines whether or not the signal level detected by the DSP 13 is less than a predetermined value (S114). When the control unit 23 determines that the signal level detected by the DSP 13 is not less than the predetermined value, that is, greater than or equal to the predetermined value (S114: No), it executes the process of S101. When it is determined that the signal level detected by the DSP 13 is less than the predetermined value (S114: Yes), the control unit 23 determines whether or not a predetermined time has passed while the signal level is less than the predetermined value. (S115). When it is determined that the predetermined time has not elapsed while the signal level is less than the predetermined value (S115: No), the control unit 23 executes the process of S114. Then, the control unit 23 repeatedly executes the processes of S114 and S115 until it is determined that the predetermined time has passed while the signal level is less than the predetermined value (S115: Yes). When the control unit 23 determines that the predetermined time has passed while the signal level is less than the predetermined value (S115: Yes), the control unit 23 determines that the analog audio signal is not output to the Zone2 output unit 8, and outputs the Zone2 output. The function of the unit 8 is turned off (S116), and the process is terminated.

  When the control unit 23 determines that the function of the Zone 3 output unit 9 is on (S112: Yes), since the functions of both the Zone 2 output unit 8 and the Zone 3 output unit 9 are on, first, the main output unit switch 15, the analog audio input terminal 5 connected to the Zone 2 output unit 8 is connected to the main output unit 7 (S117). Next, the control unit 23 determines whether or not the signal level detected by the DSP 13 is less than a predetermined value (S118). When it is determined that the signal level detected by the DSP 13 is less than the predetermined value (S118: Yes), the control unit 23 determines whether or not a predetermined time has passed while the signal level is less than the predetermined value. (S119). When the control unit 23 determines that the predetermined time has not elapsed while the signal level is less than the predetermined value (S119: No), the control unit 23 executes the process of S118. Then, the control unit 23 repeatedly executes the processes of S118 and S119 until it is determined that a predetermined time has elapsed while the signal level is less than the predetermined value (S119: Yes). When the control unit 23 determines that the predetermined time has elapsed while the signal level is less than the predetermined value (S119: Yes), the control unit 23 determines that the analog audio signal is not output to the Zone2 output unit 8, and outputs the Zone2 output. The function of the unit 8 is turned off (S120).

  The control unit 23 determines that the signal level detected by the DSP 13 is not less than the predetermined value, that is, greater than or equal to the predetermined value (S118: No), or after executing the processing of S120, the main output unit switch 15 Thus, the analog audio input terminal 5 connected to the Zone 3 output unit 9 and the main output unit 7 are connected (S121). Next, the control unit 23 determines whether or not the signal level detected by the DSP 13 is less than a predetermined value (S122). When the control unit 23 determines that the signal level detected by the DSP 13 is not less than the predetermined value, that is, greater than or equal to the predetermined value (S122: No), the control unit 23 executes the process of S101. When it is determined that the signal level detected by the DSP 13 is less than the predetermined value (S122: Yes), the control unit 23 determines whether or not a predetermined time has passed while the signal level is less than the predetermined value. (S123). When it is determined that the predetermined time has not elapsed while the signal level is less than the predetermined value (S123: No), the control unit 23 executes the process of S122. Then, the control unit 23 repeatedly executes the processes of S122 and S123 until it is determined that a predetermined time has elapsed while the signal level is less than the predetermined value (S123: Yes). When the control unit 23 determines that the predetermined time has passed while the signal level is less than the predetermined value (S123: Yes), the control unit 23 determines that the analog audio signal is not output to the Zone3 output unit 9, and outputs the Zone3 output. The function of the unit 9 is turned off (S124), and the process is terminated.

  As described above, in the present modification, the control unit 23 is configured to output the main output unit 7 when the function of the main output unit 7 is off, the function of the Zone 2 output unit 8 is on, and the function of the Zone 3 output unit 9 is off. The analog audio input terminal 5 connected to the Zone 2 output unit 8 and the main output unit 7 are connected by the switch 15 for use. At this time, when the signal level of the audio signal detected by the DSP 13 is less than a predetermined value, the control unit 23 turns off the function of the Zone 2 output unit 8 (cuts off the supply of power supply voltage to the Zone 2 output unit 8). . Thereby, even when the signal level of the audio signal of the Zone 2 output unit 8 other than the main output unit 7 is less than a predetermined value, the power consumption of the AV amplifier 1 can be suppressed. Similarly, when the function of the main output unit 7 is off, the function of the Zone 2 output unit 8 is off, and the function of the Zone 3 output unit 9 is on, the function of the Zone 3 output unit 9 is turned off (to the Zone 3 output unit 9). By cutting off the supply of the power supply voltage, the power consumption of the AV amplifier 1 can be suppressed.

  In the present modification, the main output unit switch 15 is connected to the analog audio input terminal 5 and the main output unit 7 connected to the Zone 2 output unit 8 and the analog audio input terminal connected to the Zone 3 output unit 9. 5 and the main output unit 7 are switched and connected. In such a case, the signal level of the audio signal of the Zone 2 output unit 8 and the Zone 3 output unit 9 is erroneously detected due to an error in switching timing, and the function of the output unit whose signal level is a predetermined value or more is turned off (power supply voltage May be cut off). In this embodiment, only when the total value of the signal levels of the audio signals output to the main output unit 7, the Zone2 output unit 8, and the Zone3 output unit 9 is less than a predetermined value (S1: Yes), the control unit 23 is Since the functions of the Zone 2 output unit 8 and the Zone 3 output unit 9 are turned off, occurrence of a problem that the function of the output unit whose signal level is equal to or higher than a predetermined value is turned off is suppressed.

  In the above-described embodiment, the AV amplifier 1 includes the main output unit 7, the Zone2 output unit 8, and the Zone3 output unit 9, but the number of output units is not limited to three, and is four or more. Also good. Even when there are four or more output units, when the function of the main output unit 7 is off and the function of the other output unit is on, the control unit 23 can switch the other output by the main output unit switch 15. The analog audio input terminal 5 connected to the unit and the main output unit 7 may be switched and connected to determine whether an analog audio signal is input to the other output unit.

  In the embodiment described above, the main output unit 7 includes the volume controller 71 and the amplification unit 72. However, the present invention is not limited to this, and other devices for outputting an analog audio signal to the analog audio output terminal 10a may be included. The same applies to the Zone 2 output unit 8 and the Zone 3 output unit 9.

  In the above-described embodiment, when it is determined that the function of the main output unit 7 is on and no analog audio signal is output to the main output unit 7, the function of the main output unit 7 is turned off. In addition, the function of the main output unit switch 15 may be turned off. The same applies to the Zone 2 output unit switch 16 and the Zone 3 output unit switch 17.

  In the above-described embodiment, the selector 11 and the volume controller 71 of the main output unit 7 are separate circuits. Not limited to this, the selector 11 and the volume controller 71 of the main output unit 7 may be an integrated circuit.

  In the above-described embodiment, the DVD player 100a and the like are exemplified as the content playback device connected to the AV amplifier 1. Not only this but a radio receiver, a record player, etc. may be sufficient.

  In the above-described embodiment, the output units 7 to 9 connected to the analog audio output terminal 10 have been described as output units. Not limited to this, an output unit connected to a line-out output terminal whose output signal level is fixed, an output unit connected to a pre-out output terminal whose output signal level is variable by a volume controller, digital audio output An output unit connected to the terminal may be provided.

  The present invention can be suitably employed in an audio processing device such as an AV amplifier.

1 AV amplifier (audio processor)
2 Microcomputer 21 Reception unit 22 Detection unit (second detection unit)
23 Control part 5 Analog audio | voice input terminal 7 Main output part (1st output part)
8 Zone2 output section (second output section)
9 Zone3 output section (third output section)
10 Analog audio output terminal 11 Selector 12 A / D converter 13 DSP (first detector)
15 Main output switch (first connection)
16 Zone2 output section switch (second connection section)
17 Zone3 output part switch (third connection part)

Claims (4)

A plurality of audio input terminals to which audio signals are respectively input;
A first output unit and a second output unit for outputting audio signals input from the plurality of audio input terminals;
An accepting unit that accepts selection of an output unit to which the audio signals input from the plurality of audio input terminals are output;
A first connection unit that connects any one of the plurality of audio input terminals to the first output unit;
A second connecting portion for connecting any one of the plurality of audio input terminals and the second output portion;
A first detection unit connected to the first output unit for detecting a signal level of the audio signal;
A control unit that controls the first connection unit and the second connection unit based on the selection received by the reception unit, and controls supply of a power supply voltage to the first output unit and the second output unit. And a voice processing device comprising:
The control unit is connected to the second output unit by the first connection unit when the function of the first output unit is off and the function of the second output unit is on. When the audio input terminal and the first output unit are connected and the signal level of the audio signal detected by the first detection unit is less than a predetermined value, the supply of the power supply voltage to the second output unit is cut off. A voice processing apparatus characterized by: A third output unit for outputting audio signals input from the plurality of audio input terminals;
A third connecting portion for connecting any one of the plurality of audio input terminals and the third output portion;
The control unit further controls the third connection unit based on the selection received by the reception unit, and controls supply of a power supply voltage to the third output unit,
When the function of the first output unit is off and the function of the second output unit and the third output unit is on, the control unit causes the second output by the first connection unit. The voice input terminal connected to a part and the first output part, and the voice input terminal connected to the third output part and the first output part are switched and connected, and the first connection part Is connected between the audio input terminal connected to the second output unit and the first output unit, and the signal level of the audio signal detected by the first detection unit is less than a predetermined value. In addition, the supply of the power supply voltage to the second output unit is cut off, and the first connection unit connects the audio input terminal connected to the third output unit and the first output unit, And the signal level of the audio signal detected by the first detector is less than a predetermined value. A sound processing device according to claim 1, characterized in that to shut off the supply of power supply voltage to the third output section. A second detector for detecting a total value of signal levels of the audio signals output to the first output unit, the second output unit, and the third output unit;
The control unit is configured such that the total value detected by the second detection unit is less than a predetermined value, the function of the first output unit is off, and the second output unit and the third output unit When the function is ON, the audio connected to the audio output terminal connected to the second output unit, the first output unit, and the third output unit by the first connection unit. The audio processing apparatus according to claim 2, wherein an input terminal and the first output unit are switched and connected. The control unit further includes a normal mode including supply of power supply voltage to the first output unit, and supply of power supply voltage to the first output unit and the second output unit is interrupted. Control the device itself to a standby mode with lower power consumption than the normal mode,
In the control unit, the function of the first output unit is off, the function of the second output unit is on, and the signal level of the audio signal detected by the first detection unit is less than a predetermined value. 2. The audio processing apparatus according to claim 1, wherein in some cases, the apparatus is set to a standby mode.

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