Audio system, audio system control method, audio device, speaker, and distribution device

Abstract

Provided is an acoustic system that achieves appropriate coordination in accordance with the power supply state of acoustic apparatuses.　An acoustic system in which a first acoustic apparatus and a second acoustic apparatus are connected. The first acoustic apparatus comprises a first control unit which, in response to a power supply-on or standby operation, transmits an instruction for transitioning to a power supply-on state or a standby state to the second acoustic apparatus, and transitions to the power supply-on state or the standby state. The second acoustic apparatus comprises a second control unit which, upon receiving the instruction when receiving external feeding of power, transitions to the power supply-on state or the standby state in accordance with the instruction, and which, when not receiving the external feeding of power, maintains a current state.

Description

[Technical field]

[0001] An embodiment of the present invention relates to an audio system, an audio system control method, an audio device, a speaker, and a distribution device. [Background technology]

[0002] Patent document 1 discloses an audio reproduction method that can control the power on / off of an audio playback device in conjunction with a portable music playback device when sound played on a portable music playback device in a user's hand is also played on an audio playback device in a remote location. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-62580 A Summary of the Invention [Problem to be solved by the invention]

[0004] The sound reproduction method of Patent Document 1 simply controls the power supply of the sound reproduction device to be turned on and off in conjunction with the portable music reproduction device.

[0005] An object of one embodiment of the present invention is to provide an audio system that realizes appropriate interlocking according to the power supply state of audio devices. [Means for solving the problem]

[0006] An audio system according to one embodiment of the present invention is an audio system to which a first audio device and a second audio device are connected, wherein the first audio device is provided with a first control unit that, when a power-on or standby operation is received, sends an instruction to the second audio device to transition to a power-on state or a standby state, and transitions to the power-on state or the standby state, and the second audio device is provided with a second control unit that, when receiving the instruction while receiving external power, transitions to the power-on state or the standby state in accordance with the instruction, and when receiving the instruction while not receiving external power, maintains the current state.

[0007] Alternatively, an audio system according to one embodiment of the present invention is an audio system to which a first audio device and a second audio device are connected, wherein the first audio device is provided with a first control unit that, when a power-on or standby operation is received, sends an instruction to the second audio device to transition to a power-on state or a standby state, and transitions to the power-on state or the standby state, and the second audio device is provided with a second control unit that, when receiving the instruction when the remaining battery level is equal to or greater than a threshold level, transitions to the power-on state or the standby state in accordance with the instruction, and maintains the current state when the remaining battery level is less than the threshold level. Effect of the Invention

[0008] According to one embodiment of the present invention, it is possible to realize appropriate interlocking according to the power supply state of the audio equipment. [Brief description of the drawings]

[0009] [Figure 1] 1 is a block diagram showing a configuration of an audio system 1. FIG. [Diagram 2] 1 is a block diagram showing a configuration of a distribution device 10. FIG. [Diagram 3] 2 is a block diagram showing the configuration of a speaker 11. FIG. [Figure 4] 4 is a flowchart showing the operation of the speaker 11 and the distribution device 10. [Diagram 5] 4 is a flowchart showing the operations of the speaker 11 and the distribution device 10. [Figure 6] 4 is a flowchart showing the operations of the speaker 11 and the distribution device 10. [Figure 7] 4 is a flowchart showing the operations of the speaker 11 and the distribution device 10. [Figure 8] 1 is a block diagram showing a configuration of a distribution device 10. FIG. [Figure 9] 4 is a flowchart showing the operations of the speaker 11 and the distribution device 10. [Figure 10] 4 is a flowchart showing the operation of the speaker 11 and the speaker 12. [Figure 11] 4 is a flowchart showing the operations of the speaker 11 and the distribution device 10. [Figure 12] 13 is a table showing an allocation of playback roles of speakers 11 to 14 stored in flash memory 114 of distribution device 10. [Figure 13] 4 is a flowchart showing the operation of the speaker 11 and the distribution device 10 in a multi-channel mode. [Figure 14] 11 is a flowchart showing an operation of distribution device 10 when it transitions from a standby state to a power-on state in the multi-channel mode. [Figure 15] FIG. 1 is a block diagram showing a configuration of an audio system 1. [Figure 16] FIG. 1 is a block diagram showing a configuration of an audio system 1. [Figure 17] FIG. 1 is a block diagram showing a configuration of an audio system 1. [Figure 18] 4 is a flowchart showing the operation of the speaker 11. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Fig. 1 is a block diagram showing the configuration of an audio system 1 according to an embodiment of the present invention. The audio system 1 includes a distribution device 10 and multiple speakers 11-14. The distribution device 10 and the multiple speakers 11-14 are connected via wireless communication. However, the distribution device 10 and the multiple speakers 11-14 may be connected via a wired connection using an audio cable or the like. The distribution device 10 is an example of a first audio device of the present invention, and the speakers 11-14 are an example of a second audio device of the present invention.

[0011] The distribution device 10 is, for example, a set-top box, a personal computer, an audio receiver, a wireless access point, or a speaker device. The distribution device 10 receives content data from a content playback device such as a television or a player. The distribution device 10 may also receive content data from a server or the like via the Internet.

[0012] The distribution device 10 decodes the received content data and extracts audio signals of multiple channels. However, the distribution device 10 may receive decoded audio signals of multiple channels. The distribution device 10 distributes the audio signals of multiple channels to speakers 11 to 14.

[0013] Fig. 2 is a block diagram showing the configuration of distribution device 10. Fig. 3 is a block diagram showing the configuration of speaker 11. Note that since speakers 11 to 14 all have the same configuration and function, Fig. 3 shows the configuration of speaker 11 as a representative.

[0014] The distribution device 10 includes a display 101, a user interface (I / F) 102, a CPU 103, a flash memory 104, a RAM 105, a wireless communication unit 106, and an HDMI (registered trademark) interface (I / F) 107.

[0015] The display 101 is made up of a plurality of LEDs, and displays, for example, a standby state / power-on state. The user I / F 102 is made up of, for example, a power button. The power button is an example of a user interface for accepting a power-on or standby operation.

[0016] CPU 103 is an example of a first control unit, and reads out a program stored in flash memory 104, which is a storage medium, into RAM 105 to realize a predetermined function. For example, CPU 103 decodes content data received from HDMI (registered trademark) I / F 107 and extracts audio signals of multiple channels. CPU 103 accepts a power-on or standby operation via the power button of user I / F 102. For example, when CPU 103 accepts a power button operation while the current state is a power-on state, it transitions from the power-on state to the standby state. When CPU 103 accepts a power button operation while the current state is a standby state, it transitions from the standby state to the power-on state.

[0017] The wireless communication unit 106 is a wireless communication unit conforming to standards such as Wi-Fi (registered trademark) or Bluetooth (registered trademark). The wireless communication unit 106 communicates with the speakers 11 to 14 by wireless communication such as Wi-Fi (registered trademark) or Bluetooth (registered trademark). The CPU 103 distributes sound signals of multiple channels to the speakers 11 to 14 via the wireless communication unit 106.

[0018] The speaker 11 includes a display 111 , a user interface (I / F) 112 , a CPU 113 , a flash memory 114 , a RAM 115 , a wireless communication unit 116 , a DSP 117 , a playback unit 118 , a power supply unit 119 , and a battery 120 .

[0019] The display 111 is made up of a number of LEDs and displays, for example, a standby state / power-on state. The display 111 may also display the current playback mode. The playback modes will be described later.

[0020] The user I / F 112 is, for example, a power button. The power button is an example of a user interface for accepting a power-on or standby operation. The user I / F 112 may also have a mode change button for accepting a change in the playback mode.

[0021] CPU 113 is an example of a second control unit, and reads out a program stored in flash memory 114, which is a storage medium, into RAM 115 to realize a predetermined function. For example, CPU 113 inputs an audio signal received via wireless communication unit 116 to DSP 117. DSP 117 performs various signal processing on the input audio signal. Reproducing unit 118 has a DA converter, an amplifier, and a speaker unit, which are not shown. Reproducing unit 118 reproduces the audio signal after signal processing by DSP 117 and emits the sound.

[0022] Furthermore, CPU 113 accepts a power-on or standby operation via a power button of user I / F 112. For example, when CPU 113 accepts a power button operation when the current state is a power-on state, it transitions from the power-on state to the standby state. When CPU 113 accepts a power button operation when the current state is a standby state, it transitions from the standby state to the power-on state.

[0023] Power supply unit 119 receives power from the outside or battery 120. Power supply unit 119 has an AC / DC converter or a DC / DC converter, and supplies the power required for each hardware configuration from display 111 to playback unit 118. In the power-on state, power supply unit 119 supplies the power required for all hardware configuration. In the standby state, power supply unit 119 mainly supplies power to CPU 113 and wireless communication unit 116, and stops the power supply to the configuration related to sound playback such as playback unit 118. The configuration related to sound playback is a configuration that consumes a large amount of power, such as amplification. In the standby state, power supply unit 119 stops the power supply to the configuration related to sound playback, thereby setting the device in a power-saving state. However, power supply unit 119 supplies power to CPU 113 and wireless communication unit 116 even in the standby state. Therefore, speaker 11 can transmit and receive information via the network.

[0024] When there is an external power supply, the power supply unit 119 supplies the externally supplied power to each hardware configuration. When there is an external power supply, the power supply unit 119 charges the battery 120. When there is no external power supply, the power supply unit 119 supplies the power of the battery 120 to each hardware configuration.

[0025] In the present embodiment, the speakers 11 to 14 transition to a power-on state or a standby state in conjunction with the transition of the distribution device 10 to a power-on state or a standby state.

[0026] Fig. 4 is a flowchart showing the operations of the speaker 11 and the distribution device 10. Although Fig. 4 shows the operation of the speaker 11 as a representative, the other speakers 12 to 14 also perform the same operations.

[0027] When the distribution device 10 receives a power operation via the user I / F 102 (S11), it transmits an instruction to all currently connected speakers to switch to a power-on state or a standby state (S12). After that, the distribution device 10 switches to a power-on state or a standby state (S13). Note that the distribution device 10 can also transmit and receive information via the network in the standby state.

[0028] When the distribution device 10 receives a power operation while the current state is the power-on state, the distribution device 10 transmits an instruction to all speakers to transition to the standby state, and transitions to the standby state. When the distribution device 10 receives a power operation while the current state is the standby state, the distribution device 10 transmits an instruction to all speakers to transition to the power-on state, and transitions to the standby state.

[0029] The speaker 11 receives an instruction to transition to a power-on state or a standby state from the distribution device 10 (S21). When the speaker 11 receives the instruction, it determines whether or not there is external power supply (S22). When it determines that there is external power supply, the speaker 11 transitions to a power-on state or a standby state (S23). When the speaker 11 receives an instruction to transition to a power-on state from the distribution device 10, it transitions to the power-on state. Also, when the speaker 11 receives an instruction to transition to a standby state from the distribution device 10, it transitions to the standby state. On the other hand, when the speaker 11 determines that there is no external power supply, it maintains the current state (S24).

[0030] Note that distribution device 10 may extract speakers with external power supply and transmit an instruction to switch to a power-on state or a standby state only to the speakers with external power supply. In this case, speakers 11-14 periodically transmit information indicating whether or not there is external power supply to distribution device 10. An instruction to switch to a power-on state or a standby state is transmitted only to speakers with external power supply. Therefore, when speakers 11-14 receive an instruction to switch to a power-on state or a standby state, they switch to a power-on state or a standby state. When there is no external power supply, speakers 11-14 maintain their current state.

[0031] The speakers 11 to 14 may be linked with the distribution device 10 only when the speakers are shifted from a power-on state to a standby state. That is, the distribution device 10 may not transmit an instruction when the speakers are shifted from a standby state to a power-on state, but may transmit an instruction only when the speakers are shifted from a power-on state to a standby state. Alternatively, even if the speakers 11 to 14 receive an instruction to shift to the power-on state, the speakers 11 to 14 may maintain the current state if there is no external power supply, and shift to the power-on state only when there is external power supply.

[0032] The standby state may include a network standby state in which power is supplied mainly to CPU 113 and wireless communication unit 116 and information can be transmitted and received via a network, and an eco standby state in which power supply to wireless communication unit 116 is also stopped. In the eco standby state, speakers 11 to 14 also stop transmitting and receiving information via the network.

[0033] When switching from a power-on state to a standby state, power supply unit 119 switches to a network standby state if there is external power supply, and switches to an eco standby state if there is no external power supply. Also, when power supply unit 119 receives external power supply in the eco standby state, it switches to the network standby state.

[0034] In the eco standby state, the transmission and reception of information via the network is stopped. Therefore, when there is no external power supply, the speakers 11 to 14 maintain their current state (eco standby state) even if the distribution device 10 transitions to a power-on state. Also, when there is external power supply, the speakers 11 to 14 enter a network standby state and transmit and receive information via the network. Therefore, when there is external power supply, when the distribution device 10 transitions to a power-on state, the speakers 11 to 14 transition to a power-on state in conjunction with the distribution device 10.

[0035] Furthermore, when the power supply unit 119 transitions from the power-on state to the standby state, the power supply unit 119 may transition to the network standby state if the remaining charge of the battery 120 is equal to or greater than the threshold, and transition to the eco standby state if the remaining charge of the battery 120 is less than the threshold. In this case, the speakers 11 to 14 maintain the current state (eco standby state) even if the distribution device 10 transitions to the power-on state if the remaining charge of the battery 120 is less than the threshold. Furthermore, the speakers 11 to 14 transition to the network standby state and transmit and receive information via the network if the remaining charge of the battery 120 is equal to or greater than the threshold. Therefore, when the distribution device 10 transitions to the power-on state if the remaining charge of the battery 120 is equal to or greater than the threshold, the speakers 11 to 14 transition to the power-on state in conjunction with the distribution device 10.

[0036] Of course, the standby state may be only the network standby state. In this case, the speakers 11 to 14 judge whether to link with the distribution device 10 depending on the remaining battery power. The operation when judging whether to link with the distribution device 10 depending on the remaining battery power will be described with reference to FIG. 5. FIG. 5 is a flowchart showing the operation of the speaker 11 and the distribution device 10. Although the operation of the speaker 11 is shown as a representative in FIG. 5, the other speakers 12 to 14 perform the same operation. The same processes as those in FIG. 4 are denoted by the same reference numerals, and the description will be omitted.

[0037] In this example, when the speaker 11 receives an instruction from the distribution device 10 to transition to a power-on state or a standby state, the speaker 11 determines whether the remaining charge of the battery 120 is equal to or greater than a threshold (S202). When the speaker 11 determines that the remaining charge of the battery 120 is equal to or greater than the threshold, the speaker 11 transitions to a power-on state or a standby state (S23). On the other hand, when the speaker 11 determines that the remaining charge of the battery 120 is less than the threshold, the speaker 11 maintains the current state (S24).

[0038] 6, speaker 11 may determine whether or not there is an external power supply even if the remaining charge of battery 120 is less than a threshold (S204). If there is an external power supply, speaker 11 transitions to a power-on state or a standby state (S23) even if the remaining charge of battery 120 is less than a threshold.

[0039] 7, speaker 11 may determine whether or not there is an external power supply even if the remaining charge of battery 120 is equal to or greater than a threshold (S205). If there is no external power supply even if the remaining charge of battery 120 is equal to or greater than a threshold, speaker 11 maintains the current state (S24).

[0040] Distribution device 10 may periodically receive information on remaining battery power from speakers 11-14, and transmit an instruction to switch to a power-on state or a standby state only to speakers whose remaining battery power is equal to or greater than a threshold. Distribution device 10 may periodically receive information indicating whether or not there is external power supply from speakers 11-14, and transmit an instruction to switch to a power-on state or a standby state only to speakers whose remaining battery power is equal to or greater than a threshold and that have external power supply.

[0041] In the above embodiment, the distribution device 10 is always powered by an external power supply. However, as shown in Fig. 8, the distribution device 10 may also include a power supply unit 108 and a battery 109. In this case, as shown in Fig. 9, at least one of the speakers 11 to 14 may perform the same operation as the distribution device 10 shown in Fig. 4, and the distribution device 10 may perform the same operation as the speaker 11 shown in Fig. 4.

[0042] Also, as shown in FIG. 10, at least one of speakers 11 to 14 (for example, speaker 11) may perform the same operation as distribution device 10 shown in FIG. 4, and another speaker (for example, speaker 12) may perform the same operation as speaker 11 shown in FIG. 4.

[0043] That is, the distribution device 10 or any one of the speakers 11 to 14 is assigned to the first audio device. At least any one of the speakers 11 to 14 may be the first audio device in the present invention, and the distribution device 10 may be the second audio device. A user can assign the distribution device 10 to the first audio device by operating the user I / F 102 of the distribution device 10. Also, a user can assign the speakers 11 to 14 to the first audio device by operating the user I / F 112 of the speakers 11 to 14. For example, the user I / F 102 or the user I / F 112 includes a "master switch." The distribution device 10 or the speakers 11 to 14 that have the master switch turned on are assigned to the first audio device.

[0044] Furthermore, among the speakers 11 to 14, speakers that are paired in the playback role in the multi-channel mode may perform linked operations as shown in Fig. 10. The playback mode will be described below.

[0045] 11 is a flowchart showing the operation of speaker 11 and distribution device 10 when the mode is changed. Although the operation of speaker 11 is shown as a representative in FIG. 11, the other speakers 12 to 14 also perform the same operation.

[0046] The speaker 11 accepts a change in the playback mode via the user I / F 112 (S71). The playback mode is set to any one of the multi-channel mode, the synchronous playback mode, and the solo mode. The speaker 11 transmits mode change information corresponding to the accepted playback mode to the distribution device 10 (S72). The distribution device 10 receives the mode change information (S81) and performs an operation corresponding to the received mode change information (S82).

[0047] The multi-channel mode is a mode in which sound signals of different channels are reproduced on each of a plurality of speakers. When the distribution device 10 receives a mode change to the multi-channel mode, the distribution device 10 distributes sound signals to the plurality of speakers according to the allocation of playback roles of the speakers set in the multi-channel mode (S83).

[0048] 1, the distribution device 10 distributes an L channel sound signal to the speaker 11, an R channel sound signal to the speaker 12, an SL (surround L) channel sound signal to the speaker 14, and an SR (surround R) channel sound signal to the speaker 13. The speakers 11 to 14 each play back the sound signals of the received channels. As a result, the audio system 1 performs surround playback.

[0049] The synchronous playback mode is a mode in which audio signals of the same content and the same channel are synchronously played back on multiple speakers. When the distribution device 10 receives mode change information for the synchronous playback mode, the distribution device 10 distributes the same audio signal to all connected speakers 11 to 14 (S84).

[0050] 1, for example, distribution device 10 distributes audio signals of the L channel and the R channel to speakers 11 to 14. Each speaker reproduces the received audio signals of the L channel and the R channel. This allows a user to carry speakers 11 to 14 to different rooms, respectively, and listen to the same content in one place (e.g., the living room) in another place (e.g., the bedroom).

[0051] The solo mode is a mode in which an audio signal of a content different from that of other speakers is played. In the solo mode, the distribution device 10 distributes a specified audio signal to the speaker in the solo mode. The speaker receives an audio signal of any content from the distribution device 10. Alternatively, the speaker in the solo mode may receive and play an audio signal of any content from a host device other than the distribution device 10.

[0052] The user sets at least one of the speakers 11 to 14 to the solo mode and specifies the content to be played on the speaker set to the solo mode. The user specifies the content to be played on the speaker set to the solo mode using an information processing device (not shown) such as a smartphone connected to the distribution device 10 and the speakers 11 to 14 via a network.

[0053] This allows a user to carry the speaker from one location (eg, the living room) to another location (eg, the bedroom) and listen to different content than the content he or she was listening to in the living room.

[0054] Next, the operation in the multi-channel mode will be described with reference to Fig. 12. As described above, in the multi-channel mode, the distribution device 10 assigns playback roles to the speakers 11 to 14 in advance, and distributes audio signals to the speakers 11 to 14 in accordance with the assignments.

[0055] Fig. 12 is a playback role assignment table for speakers 11 to 14 stored in flash memory 114 of distribution device 10. Distribution device 10 assigns playback roles to each of speakers 11 to 14. In the example of Fig. 12, distribution device 10 assigns the L channel to speaker 11, the R channel to speaker 12, the SL channel to speaker 13, and the SR channel to speaker 14.

[0056] The distribution device 10 identifies the speakers 11 to 14 using an IP address and a MAC address. The MAC address is an example of unique identification information of a speaker. The IP address is a local IP address, and is assigned by a router (not shown). If the distribution device 10 has a router function, the distribution device 10 assigns an IP address. The distribution device 10 stores the IP address, MAC address, and playback role of each speaker in association with each other in the flash memory 114.

[0057] Fig. 13 is a flowchart showing the operation of speaker 11 and distribution device 10 in the multi-channel mode. Although Fig. 13 shows the operation of speaker 11 as a representative, the other speakers 12 to 14 also perform the same operation.

[0058] As shown in Fig. 13, the speaker 11 connects to the distribution device 10 via a network (S51). Similarly, the distribution device 10 connects to the speakers 11 to 14 via a network (S61). As shown in Fig. 13, the distribution device 10 assigns a playback role to each connected speaker (S62). The playback role is set in advance by, for example, a user operating the distribution device 10 and the speakers 11 to 14. The user may set the playback role using an information processing device (not shown) such as a smartphone connected to the distribution device 10 via a network.

[0059] The distribution device 10 distributes the audio signals of the channels assigned to the speakers 11 to 14 (S63). The speakers 11 to 14 receive the audio signals of the respective channels (S52) and play back the audio signals (S63).

[0060] 14 is a flowchart showing the operation of the distribution device 10 when it transitions from standby to power-on in the multi-channel mode. When the distribution device 10 transitions to the power-on state, it refers to the playback role assignment table stored in the flash memory 114 and determines whether the corresponding speaker is currently connected (S90). When it determines that all speakers corresponding to the playback role assignment table are connected, the distribution device 10 performs a process of making each speaker play sound according to the playback role (S91). That is, the distribution device 10 refers to the playback role assignment table and distributes sound signals of the channels assigned to each speaker.

[0061] On the other hand, when the distribution device 10 determines that a speaker corresponding to the playback role assignment table is not connected, it performs processing to make a speaker that is a pair of the missing speaker in the playback role play the sound of the missing speaker (S92). A pair in the playback role is, for example, the L channel and the R channel. In addition, a front channel and a surround channel are also pairs in the playback role, such as the L channel and the SL channel, or the R channel and the SR channel.

[0062] For example, in the example of Fig. 15, speaker 11 plays the L channel, speaker 12 plays the R channel, speaker 13 plays the SR channel, and speaker 14 plays the SL channel. In this state, when the power is turned on, if speaker 11 is insufficient as shown in Fig. 16, distribution device 10 distributes sound signals of the L channel and the R channel to speaker 12, which is paired with speaker 11 in the playback role. Speaker 12 plays sound signals of the L channel and the R channel. Also, if speaker 14 is insufficient as shown in Fig. 17, distribution device 10 distributes sound signals of the L channel and the SL channel to speaker 11, which is paired with speaker 14 in the playback role. Speaker 11 plays sound signals of the L channel and the SL channel.

[0063] In this way, when the distribution device 10 transitions from the standby state to the power-on state, it refers to the allocation table and determines whether the corresponding speaker is connected. When there is a speaker that is insufficient in the allocation table, the distribution device 10 performs a process of having the speaker that is paired with the insufficient speaker in the playback role play the sound of the reduced speaker. Therefore, even if the number of speakers is insufficient when the audio system 1 transitions from the standby state to the power-on state, the channel of the reduced speaker is not lost by using the speaker that is paired with the playback role to play the channel of the insufficient speaker. Therefore, it is possible to maintain a multi-channel mode that does not feel strange to the user.

[0064] The distribution device 10 may execute a virtual sound image localization process that virtually localizes the channel to be reproduced by the missing speaker at the position where it should be originally localized. The virtual sound image localization uses a head-related transfer function (hereinafter referred to as HRTF) that indicates the transfer function between the position of the sound source and the ears of the listener. The HRTF is an impulse response that expresses the volume, arrival time, and frequency characteristics of the sound from a virtual speaker installed at a certain position to the left and right ears, respectively. For example, when the speakers 13 and 14 are insufficient, the distribution device 10 adds the audio signals of the SR channel and the SL channel to the audio signals of the FR channel and the FL channel, and imparts the HRTF from each sound source position to the left and right ears to the audio signals of the SR channel and the SL channel. This makes it possible to virtually localize the sound of the SL channel and the SR channel to the positions of the speakers 13 and 14.

[0065] In addition, when the number of speakers is insufficient, the distribution device 10 may increase the volume of the speaker that is paired with the insufficient speaker in the playback role. For example, when the speaker 11 is insufficient, the distribution device 10 transmits instruction information to the speaker 12 to increase the volume by 6 dB. The speaker 12 increases the volume of the sound to be reproduced by 6 dB based on the instruction information. In this way, the audio system of this embodiment can compensate for the decrease in volume caused by the reduction in the number of speakers.

[0066] Finally, the description of the present embodiment should be considered as illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims, not by the above-described embodiments. Furthermore, the scope of the present invention includes the scope equivalent to the claims.

[0067] For example, in the above embodiment, the speakers 11 to 14 receive an instruction to switch to a power-on state or a standby state from the distribution device 10 (S21). However, as shown in Fig. 18, the speakers 11 to 14 may switch to the standby state (S23) if the state where the speakers are not connected to the distribution device 10 has elapsed for a predetermined time or more (S500: Yes) and there is an external power supply (S22: Yes). [Explanation of symbols]

[0068] 1: Sound system 10: Distribution device 11: Speaker 12: Speaker 13: Speaker 14: Speaker 101:Display unit 102: User I / F 103: CPU 104: Flash memory 105: RAM 106: Wireless communication unit 107: HDMI (registered trademark) I / F 108: Power supply unit 109:Battery 111: Display 112: User interface 113: CPU 114: Flash memory 115: RAM 116: Wireless communication section 117: DSP 118: Playback section 119: Power supply unit 120:Battery

Claims

1. An audio system to which a first audio device and a second audio device are connected, When the first audio device receives a power-on or standby operation, Transmitting an instruction to the second audio device to switch to a power-on state or a standby state; transitioning to the power-on state or the standby state; A first control unit is provided. The second acoustic device includes: When the instruction is received while receiving external power supply, the device transitions to the power-on state or the standby state in accordance with the instruction; If the external power supply is not received, the current state is maintained. A second control unit is provided. Sound system.

2. An audio system to which a first audio device and a second audio device are connected, When the first audio device receives a power-on or standby operation, Transmitting an instruction to the second audio device to switch to a power-on state or a standby state; transitioning to the power-on state or the standby state; A first control unit is provided, The second acoustic device includes: When the instruction is received while the remaining battery level is equal to or greater than a threshold, the device transitions to the power-on state or the standby state in accordance with the instruction; If the battery level is less than a threshold, maintain the current state. A second control unit is provided. Sound system.

3. The second control unit of the second acoustic device Even if the remaining battery charge is equal to or greater than the threshold, if no external power supply is being received, the current state is maintained.

3. The audio system of claim 2.

4. The second control unit of the second acoustic device Even if the remaining battery level is less than the threshold, when the instruction is received while receiving external power supply, the device transitions to the power-on state or the standby state in accordance with the instruction.

4. The acoustic system according to claim 2 or 3.

5. The first audio device is a distribution device that distributes an audio signal to the second audio device.

5. An audio system according to claim 1.

6. the first audio device and the second audio device are a distribution device that distributes an audio signal or a speaker that receives the audio signal from the distribution device, Any one of the distribution device and the speaker is assigned to the first audio device.

6. An audio system according to any one of claims 1 to 5.

7. A method for controlling an audio system to which a first audio device and a second audio device are connected, comprising the steps of: When the first audio device receives a power-on or standby operation, Transmitting an instruction to the second audio device to switch to a power-on state or a standby state; transitioning to the power-on state or the standby state; The second acoustic device includes: When the instruction is received while receiving external power supply, the device transitions to the power-on state or the standby state in accordance with the instruction; If the external power supply is not received, the current state is maintained. A method for controlling an audio system.

8. A method for controlling an audio system to which a first audio device and a second audio device are connected, comprising the steps of: When the first audio device receives a power-on or standby operation, Transmitting an instruction to the second audio device to switch to a power-on state or a standby state; transitioning to the power-on state or the standby state; The second acoustic device includes: When the instruction is received while the remaining battery level is equal to or greater than a threshold, the device transitions to the power-on state or the standby state in accordance with the instruction; If the battery level is less than a threshold, maintain the current state. A method for controlling an audio system.

9. The second acoustic device includes: Even if the remaining battery charge is equal to or greater than the threshold, if no external power supply is being received, the current state is maintained. The method for controlling an audio system according to claim 8.

10. The second acoustic device includes: Even if the remaining battery level is less than the threshold, when the instruction is received while receiving external power supply, the device transitions to the power-on state or the standby state in accordance with the instruction.

10. A method for controlling an audio system according to claim 8 or 9.

11. The first audio device is a distribution device that distributes an audio signal to the second audio device. A method for controlling an audio system according to any one of claims 7 to 10.

12. the first audio device and the second audio device are a distribution device that distributes an audio signal or a speaker that receives the audio signal from the distribution device, Any one of the distribution device and the speaker is assigned to the first audio device. A method for controlling an audio system according to any one of claims 7 to 11.

13. A method for controlling an audio system to which a first audio device and a second audio device are connected, comprising: The first acoustic device includes: receiving information indicating whether or not an external power supply is present from the second audio device; When the power is turned on or the standby operation is received, Transmitting an instruction to switch to a power-on state or a standby state to the second audio device receiving external power; transitioning to the power-on state or the standby state; The second acoustic device includes: When the instruction is received, the power supply transitions to the power-on state or the standby state in accordance with the instruction. A method for controlling an audio system.

14. A method for controlling an audio system to which a first audio device and a second audio device are connected, comprising: The first acoustic device includes: receiving information on a remaining battery level from the second audio device; When the power is turned on or the standby operation is received, Transmitting an instruction to switch to a power-on state or a standby state to the second audio device having a remaining battery charge equal to or greater than a threshold; transitioning to the power-on state or the standby state; The second acoustic device includes: When the instruction is received, the power supply transitions to the power-on state or the standby state in accordance with the instruction. A method for controlling an audio system.

15. receiving an instruction to switch to a power-on state or a standby state from the audio device when a power-on or standby operation is received; When the instruction is received while receiving external power supply, the device transitions to the power-on state or the standby state in accordance with the instruction; maintain the current state when the external power supply is not received; A speaker with a control unit.

16. receiving an instruction to switch to a power-on state or a standby state from the audio device when a power-on or standby operation is received; When the instruction is received while the remaining battery level is equal to or greater than a threshold, transition to the power-on state or the standby state in accordance with the instruction; maintain the current state if the remaining battery charge is less than a threshold; A speaker with a control unit.

17. A distribution device that distributes an audio signal to a speaker, receiving an instruction to transition to a power-on state or a standby state from the speaker; When the instruction is received while receiving external power supply, the device transitions to the power-on state or the standby state in accordance with the instruction; maintain the current state when the external power supply is not received; A distribution device equipped with a control unit.

18. A distribution device that distributes an audio signal to a speaker, receiving an instruction to transition to a power-on state or a standby state from the speaker; When the instruction is received while the remaining battery level is equal to or greater than a threshold, transition to the power-on state or the standby state in accordance with the instruction; maintain the current state if the remaining battery charge is less than a threshold; A distribution device equipped with a control unit.

Images