JP2016174226A - Voice radio transmission system, speaker apparatus, and source apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a voice radio transmission system that transmits a voice signal from a source apparatus to a plurality of speaker apparatuses by radio communication and that divides the plurality of speaker apparatuses into a plurality of groups, and can individually change voice per group by operation at a speaker apparatus side when a voice signal is reproduced per group.SOLUTION: In a system of the present invention, a speaker apparatus 2 accepts user operation to operate a source apparatus 1, and transmits an operation signal indicated by the user operation to the source apparatus 1; and on the basis of the operation signal received from the speaker apparatus, the source apparatus 1 changes a voice signal or voice signal processing parameter for causing a speaker group to which the speaker apparatus 2, the transmission source of the operation signal, belongs of all the speaker apparatuses 2 included in the system to output.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a voice wireless transmission system that wirelessly transmits a voice signal, a speaker device in the system, and a source device.

  2. Description of the Related Art Conventionally, some speaker devices are provided with an adjustment knob for adjusting the volume or the like of output sound. In addition, as a technique for operating the speaker device, Patent Document 1 discloses a speaker device including a light receiving element that receives an operation signal from a remote controller (remote controller). In this speaker device, it is possible to select (switch) the source device that inputs the audio signal, adjust the sound quality in the built-in signal processing unit, and adjust the volume in the built-in audio amplifier based on the operation from the remote control. ing.

  Patent Document 2 discloses a speaker device (that is, a speaker array device) in which a plurality of speaker units are arranged and includes a light receiving unit that receives an operation signal from a remote controller. In this speaker array device, an operation for changing the angle and focal length of the sound beam is received by the remote controller, and the delay amount of the sound signal output from each speaker unit and the level of the sound signal are changed according to the operation. . Also, with this technology, it is possible to accept volume adjustment and content selection operations at an operation unit provided in a content reproduction apparatus connected to the speaker array device.

  On the other hand, in recent years, the number of devices utilizing wireless communication in AV (Audio Visual) devices has increased, and for audio, WiFi (registered trademark, the same applies hereinafter), ZigBee (registered trademark, the same applies hereinafter), Bluetooth (registered trademark). The same shall apply hereinafter), Wireless Speaker and Audio (WiSA; registered trademark, the same shall apply hereinafter), and the like. By using wireless communication for audio signal transmission, a speaker device and a source device such as a player or an amplifier are connected wirelessly, which is convenient because there is no need to route a cable.

JP 2014-216985 A JP 2008-35252 A

  However, in a conventional system in which audio signals are transmitted from a source device to a plurality of speaker devices by wireless communication, the speaker device is placed in a room other than the room where the source device is located, taking advantage of the wireless characteristics, and the plurality of rooms If you try to create a listening environment that allows you to listen to content individually, the change operation that changes the content, audio characteristics, volume, etc., basically goes to the installation location (installation room) of the source device, Will be done. That is, when a plurality of speaker devices wirelessly connected to the source device are divided into a plurality of groups and the content is reproduced for each group, the change operation is basically performed on the source device.

  Even if the technology described in Patent Documents 1 and 2 is applied and the above change operation can be performed on the speaker device by operating a remote controller or the like from a room where the source device is not installed, only the speaker device is configured. Will reflect such changes. In this case, it is necessary for the user to perform the changing operation such as adjusting the volume based on his / her sense on each speaker device.

  In the technique described in Patent Document 2, the sound signal level output from the signal processing unit in the speaker array device is adjusted by mounting the light receiving unit that receives the operation signal from the remote control in the speaker array device. However, it is only possible to adjust the audio signal level of each speaker unit in one speaker array device installed in one place.

  The present invention has been made in view of the above situation, and an object of the present invention is to provide a plurality of speaker devices in an audio wireless transmission system that transmits audio signals from a source device to a plurality of speaker devices by wireless communication. When audio signals are reproduced for each group divided into a plurality of groups, the audio can be changed for each group by an operation on the speaker device side.

  In order to solve the above problems, a first technical means of the present invention includes a plurality of grouped speaker devices, and a source device that transmits an audio signal to the plurality of speaker devices by wireless communication. An audio wireless transmission system provided, wherein the speaker device receives a user operation for operating the source device, transmits an operation signal indicated by the user operation to the source device, and the source device transmits the speaker Based on the operation signal received from the device, the audio signal or the parameter for processing the audio signal to be output to the speaker group to which the speaker device that is the transmission source of the operation signal of the plurality of speaker devices belongs is changed. It is characterized by that.

  According to a second technical means of the present invention, in the first technical means, the user operation includes an operation of changing a characteristic of an audio signal indicated by the audio signal, an operation of selecting content to be output as the audio signal, One of operations for changing the reproduction state is included.

  According to a third technical means of the present invention, in the first or second technical means, the speaker device includes a receiving unit that receives a signal transmitted from a remote controller, and the user operation is performed by receiving the signal. It is characterized by being able to accept.

  According to a fourth technical means of the present invention, in any one of the first to third technical means, the speaker device transmits the operation signal to the source device by wireless communication. .

  According to a fifth technical means of the present invention, in any one of the first to fourth technical means, the audio signal transmitted from the source device is an uncompressed signal. .

  According to a sixth technical means of the present invention, one speaker among the plurality of speaker devices that receives the audio signal from the source device that transmits the audio signal to the grouped plurality of speaker devices by wireless communication. The speaker device receives a user operation for operating the source device, transmits an operation signal indicated by the user operation to the source device, and is changed by the source device based on the operation signal. In addition, the audio signal or the audio signal processing parameter for the speaker group to which the speaker device belongs is received from the source device by wireless communication.

  A seventh technical means of the present invention is a source device that transmits an audio signal by wireless communication to a plurality of grouped speaker devices, for operating the source device transmitted from the speaker device. An audio signal or an audio signal for receiving an operation signal indicating a user operation of the user and outputting the operation signal to a speaker group to which the speaker device that is the transmission source of the operation signal belongs among the plurality of speaker devices based on the operation signal The processing parameter is changed.

  According to the present invention, in an audio wireless transmission system that transmits audio signals from a source device to a plurality of speaker devices by wireless communication, when the plurality of speaker devices are divided into a plurality of groups and audio signals are reproduced for each group. The sound can be changed for each group by an operation on the speaker device side.

It is a block diagram which shows the example of 1 structure of the audio | voice radio | wireless transmission system which concerns on the 1st Embodiment of this invention. It is a schematic diagram which shows an example of apparatus arrangement | positioning in the audio | voice radio transmission system of FIG. It is a figure which shows each apparatus in the apparatus arrangement | positioning of FIG. 2A. It is a figure which shows an example of the channel of the audio | voice signal transmitted and reproduced | regenerated in the audio | voice radio | wireless transmission system of FIG. It is a figure which shows the other example of the channel of the audio | voice signal transmitted and reproduced | regenerated in the audio | voice radio transmission system of FIG. It is a figure which shows the other example of the channel of the audio | voice signal transmitted and reproduced | regenerated in the audio | voice radio transmission system of FIG. It is a sequence diagram for demonstrating an example of the volume reduction process sequence in the audio | voice radio | wireless transmission system of FIG. It is a sequence diagram for demonstrating the other example of the volume reduction process sequence in the audio | voice radio | wireless transmission system of FIG. It is a sequence diagram for demonstrating an example of the content switching process procedure in the audio | voice radio | wireless transmission system which concerns on the 2nd Embodiment of this invention. It is a sequence diagram for demonstrating the 1st communication system used for the communication process in the audio | voice radio | wireless transmission system which concerns on the 3rd Embodiment of this invention. It is a sequence diagram for demonstrating the 2nd communication system used for the communication process in the audio | voice radio | wireless transmission system which concerns on the 3rd Embodiment of this invention. It is a sequence diagram for demonstrating the 3rd communication system used for the communication process in the audio | voice radio | wireless transmission system which concerns on the 3rd Embodiment of this invention. It is a figure which shows an example of the packet used for the communication process in the audio | voice radio | wireless transmission system which concerns on the 3rd Embodiment of this invention. It is a figure which shows an example of the content described in each section in the packet of FIG. 8A. It is a figure which shows an example of the packet used for the instruction | indication in the 1st communication system of FIG. 7A. FIG. 9B is a diagram showing an example of an ID (command type) described in the packet of FIG. 9A and parameters defined for each ID. It is a figure which shows an example of the packet used for the instruction | indication response in the 1st communication system of FIG. 7A. FIG. 9D is a diagram illustrating an example of an ID (instruction type) described in the packet of FIG. 9C and parameters defined for each ID. It is a figure which shows an example of the packet used for the request | requirement in the 2nd communication system of FIG. 7B. FIG. 10B is a diagram showing an example of an ID (request type) described in the packet of FIG. 10A and parameters defined for each ID. It is a figure which shows an example of the packet used for the request response in the 2nd communication system of FIG. 7B. It is a figure which shows an example of the parameter prescribed | regulated for every ID (request | requirement response classification) described in the packet of FIG. 10C, and ID. It is a figure which shows an example of the packet used for the notification in the 3rd communication system of FIG. 7C. It is a figure which shows an example of the parameter prescribed | regulated for ID (notification classification) described in the packet of FIG. 11A, and ID.

  The audio wireless transmission system according to the present invention is a system including a speaker device and a source device, and can be said to be a wireless audio system, a wireless speaker system, or the like. Although this source device has a wireless communication unit for transmitting an audio signal by wireless communication, the wireless communication unit may be configured as a separate casing.

  The source device includes various audio playback devices such as a CD (Compact Disc) player, an SACD (Super Audio CD) player, a BD (Blu-ray Disc; registered trademark) player, an HDD (Hard disk drive) player, TV apparatus, PC (Personal Computer), etc. are mentioned. Here, examples of the audio playback device include a network player that receives a music file stored in a server on the network via the network and wirelessly transmits it to the speaker device. In addition, in any source device, a part of the speaker device may be incorporated (in addition, the built-in speaker device may be configured to transmit various data by wire). For example, the center speaker can be provided in the housing of the display unit of the television device, and the speakers for other channels can be arranged in a separate housing as the speaker device. Hereinafter, a voice radio transmission system according to the present invention will be described with reference to the drawings.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a block diagram showing a configuration example of a voice radio transmission system (hereinafter, this system) according to the present embodiment.

  The system includes a plurality of grouped speaker devices 2 and a source device 1 that transmits audio signals to the plurality of speaker devices 2 by wireless communication. In FIG. 1, only one of the plurality of speaker devices 2 is illustrated, but the source device 1 and the speaker device 2 may be provided in a one-to-many relationship.

  The source device 1 is a wireless transmitter including a control unit 10 that controls the entire device and a wireless communication unit 15. The control unit 10 is configured by, for example, a CPU (Central Processing Unit). By providing the wireless communication unit 15, the source device 1 is caused to function as a wireless transmitter that transmits an uncompressed audio signal (an original audio signal) or a compressed audio signal to the speaker device 2 by wireless communication. Can do. Hereinafter, an example in which an audio signal is wirelessly transmitted without compression will be described. It can be said that it is preferable that the audio signal transmitted from the source device 1 is an uncompressed signal because high-quality audio can be output from the speaker device 2.

  Further, the source device 1 of this configuration example includes an audio input unit for inputting audio content (audio signal) to be output. As an example of the voice input unit, an example in which the voice input terminal 11, the communication unit 12, and the voice input processing unit 13 are provided is given here. However, if one of the voice input terminal 11 and the communication unit 12 is provided. Good.

  As the audio input terminal 11, input terminals of various standards such as a High-Definition Multimedia Interface (HDMI; registered trademark, the same applies hereinafter) terminal can be applied. The communication unit 12 is a part for receiving audio content by communicating with the outside based on a standard such as LAN (Local Area Network), WiFi, Bluetooth, etc., regardless of wired or wireless. The communication unit 12 may be configured to receive, for example, an Internet radio broadcast. Of course, both the communication unit 12 and the wireless communication unit 15 can use the same standard, such as adopting the WiFi standard, but in that case, in order to avoid interference between reception and transmission of the audio signal, the MAC (Media Access) Control address) Different identifiers such as addresses may be used.

  The audio input processing unit 13 is a part that converts an audio signal input from the audio input terminal 11 or the communication unit 12 so as to match a processing format in the signal processing unit 14 described later. For example, an analog signal is converted into a digital signal. (Or reverse conversion thereof), a process of multiplexing signals of a plurality of channels included in the audio signal (or the reverse demultiplexing process), and the like. In addition to the audio input terminal 11 and the communication unit 12, or in place of one or both of them, the source device 1 reads out the audio content from the storage device and plays back the audio content. And an audio reproducing unit that performs the operation.

  The source device 1 further includes a signal processing unit 14 that performs predetermined signal processing on the audio signal output from the audio input processing unit 13. As predetermined signal processing in the signal processing unit 14, for example, processing of changing the sound quality according to a user operation, processing of creating a sound field, or the like for the input sound signal before transmitting the sound signal of each channel. Examples of correction processing include correction. Of course, the signal processing in the signal processing unit 14 is different from the predetermined signal processing in the signal processing unit 22 described later. The signal processing unit 14 and the signal processing unit 22 described later are often configured by a DSP (Digital Signal Processor).

  The signal processing unit 14 passes the audio signal after the signal processing to the wireless communication unit 15 and causes the wireless communication unit 15 to perform wireless transmission. Of course, such control may be performed by the control unit 10. The wireless communication unit 15 transmits the audio signal of each channel input from the signal processing unit 14 to each speaker device 2 by wireless communication without being compressed.

  Furthermore, the source device 1 of this configuration example includes an operation unit 16 that receives a user operation and passes the operation signal to the control unit 10, and a display unit 17 that displays various types of information. As the operation unit 16, a button provided on the body of the source device 1, a receiving unit that receives an infrared signal from a remote controller or a short-range wireless signal such as Bluetooth, a wireless communication from a terminal device such as a tablet, a smartphone, or a portable information terminal Examples include a receiving unit that receives a control signal by communication. The communication unit 12 may be used as these receiving units. In the display unit 17, information related to the operation in the operation unit 16 (for example, information such as content and input source to be selected, volume and sound quality to be changed) and operation results in the operation unit 16 are displayed. Further, the function of the source device 1 can be mounted on the terminal device. In this case, the receiving unit as described above may not be provided, and the operation unit 16 and the display unit 17 may be configured with a touch panel. .

  The control unit 10 controls the speaker device 2 from the source device 1 side by transmitting the control signal corresponding to the operation signal to the speaker device 2 side, for example, by superimposing the control signal on the wireless carrier wave by the wireless communication unit 15. Can do.

  On the other hand, the speaker device 2 is a wireless receiver including a control unit 20 that controls the entire device and a wireless communication unit 21. The control unit 20 is composed of, for example, a CPU. By providing the wireless communication unit 21, the speaker device 2 can function as a wireless receiver that receives an audio signal transmitted from the source device 1 by wireless communication. The wireless communication between the wireless communication unit 15 and the wireless communication unit 21 is preferably bidirectional communication, and various parameters are also transmitted and received in addition to control data (commands) such as audio signal data and the above control signals. It is preferred that

  Here, an example is given of wireless communication between the wireless communication unit 15 and the wireless communication unit 21. An example of this wireless communication is wireless communication based on the WiSA (Wireless Speaker and Audio) standard. In this case, as the wireless communication unit 15 and the wireless communication unit 21 on the speaker device 2 side, modules on the transmission side and the reception side that are being standardized by WiSA Association can be applied, respectively. The WiSA standard is one of the standards for wirelessly transmitting audio signals by non-compressed PCM (pulse code modulation). Both the source device and the speaker device have wireless communication devices, and the uncompressed audio is transmitted from the source device to the speaker device using uncompressed PCM using a communication protocol compliant with WiFi. Further, parameters such as specification information of the speaker device can be transmitted from the speaker device to the source device.

  One specification (mounting method) using the WiSA standard will be described by applying to this configuration example. The source device 1 incorporates an equalizer in the signal processing unit 14, and performs frequency equalization processing (or room equalization processing) in the source device 1 to adjust and correct the sound characteristics. Such correction is preferably performed so as to match the speaker characteristics of each speaker device 2 (for example, which channel the speaker is for and what the frequency characteristics are). In order to match the speaker characteristics, the speaker characteristics may be stored in the source device 1 in advance, but the source device 1 makes an inquiry to each speaker device 2 or a separately provided server device. May be acquired.

  After the correction, the source device 1 wirelessly transmits to each speaker device 2 the audio signal of each channel after the equalizing process (this becomes the original sound) as uncompressed audio data. The speaker device 2 outputs the received audio signal without being processed. Alternatively, the data is multiplexed and wirelessly transmitted to all speaker devices 2 by time division or the like as common data (audio signal data for all channels). That is, the wireless transmission may be performed as broadcast data or multicast data as common data without being divided. In this case, the speaker device 2 side extracts the data of its own channel from the received data for all channels.

  In the WiSA standard, another specification (mounting method) can be adopted. In this specification, the audio signals of all channels to be used are wirelessly transmitted in a broadcast or multicast manner as described above, with no compression and no correction (as the original sound). The speaker device 2 side extracts the data of its own channel from the received data for all channels. In such a transmission method, since the amount of channel selection and correction (including frequency equalization processing or room equalization processing) is arbitrarily determined on the speaker device 2 side, setting with a higher degree of freedom is possible. Such a setting can be executed by an instruction specifying a parameter from the source device 1 side. The speaker device 2 includes an equalizer that performs frequency equalization processing or room equalization processing in a signal processing unit 22 described later, and performs equalization processing (sound quality adjustment) according to the received parameters on the received audio signal. The sound indicated by the processed sound signal is output.

  It is also possible to apply both of the mounting methods so as to correct the sound at the source device 1 and to instruct the speaker device 2 to specify the parameters for each speaker device 2. Further, even when the WiSA standard module is not adopted, the wireless communication unit 15 may multiplex the audio signals of the respective channels and then wirelessly transmit them to all the speaker devices 2, or may wirelessly transmit the wireless signals of the speaker devices 2. Only the audio signal of the target channel may be wirelessly communicated with the communication unit 21 on a one-to-one basis.

  The speaker device 2 of this configuration example includes a speaker unit 25 and also includes a signal processing unit 22, a volume adjustment unit 23, and an amplifier unit (AMP) 24. The signal processing unit 22 performs predetermined signal processing such as various filter processes on the audio signal received by the wireless communication unit 21 and outputs the processed signal to the volume adjustment unit 23. Further, the signal processing unit 22 has a D / A converter (DAC) for converting the audio signal from a digital signal to an analog signal before or after the predetermined signal processing. The DAC may be provided on the volume adjustment unit 23 side.

  Here, the parameters required for the predetermined signal processing are stored in a memory or the like inside the signal processing unit 22 (or the control unit 20), and are read out as necessary. Further, the control unit 20 or the signal processing unit 22 rewrites the above parameters based on a control signal corresponding to the operation signal from the source device 1 and / or based on a user operation received by the operation unit 26 described later. May be configured to be possible.

  The volume adjusting unit 23 passes the input audio signal to the AMP 24 and adjusts the volume of the audio output from the speaker unit 25 by adjusting the AMP 24. The AMP 24 amplifies the audio signal output from the signal processing unit 22 via the volume adjustment unit 23 and outputs the amplified audio signal to the speaker unit 25.

  The speaker device 2 includes an operation unit 26 that receives a user operation and passes the operation signal to the control unit 20. Examples of the operation unit 26 include a button provided on the main body of the speaker device 2 and a communication unit 27. The communication unit 27 refers to a receiving unit that receives an infrared signal from a remote control or a short-range wireless signal such as Bluetooth, a receiving unit that receives a control signal by wireless communication from a terminal device such as a tablet, a smartphone, or a portable information terminal. . The device such as the remote controller 3 on the side that transmits the signal received by the communication unit 27 is the same as the device such as the remote controller or the like that transmits the signal received by the receiving unit exemplified as the operation unit 16 on the source device 1 side. You may make it common.

  Moreover, it is preferable that the speaker device 2 is also provided with a display unit that displays various types of information in the same manner as the display unit 17. As a result, it is possible to display information related to operations on the operation unit 26 (for example, information such as content and input source to be selected, volume and sound quality to be changed), and operation results on the operation unit 26. .

  As a main feature of the present invention, the speaker device 2 accepts a user operation for operating the source device 1 (hereinafter referred to as “source device operation” for distinction), and an operation signal indicated by the source device operation. Can be transmitted to the source device 1. That is, the operation unit 26 can accept at least a source device operation as a user operation. Considering operability in particular, the speaker device 2 has a receiving unit that receives a signal transmitted from the remote controller 3 as described as an example of the communication unit 27, and can accept source device operation by receiving the signal. It is preferable that

  The transmission of the operation signal will be specifically described. The operation unit 26 receives the source device operation, and the control unit 20 interprets an operation signal indicating the operation of the source device, and converts the operation signal into an operation signal to be passed to the source device 1 as it is or as necessary. To the source device 1. This transmission is preferably carried out by superimposing it on a wireless carrier wave using the wireless communication unit 21, but a communication unit that performs wired or wireless communication is separately provided in the speaker device 2 and the source device 1, and the communication unit You may send it with As the communication unit, the communication unit 27 or the communication unit 12 can be used. However, it can be said that the speaker device 2 preferably transmits the operation signal to the source device 1 by wireless communication for reasons such as ease of arrangement of the speaker device 2.

  The source device 1 receives the operation signal indicating the source device operation transmitted from the speaker device 2. Based on the received operation signal, the signal processing unit 14 of the source device 1 outputs the signal to the speaker group to which the speaker device 2 that is the transmission source of the operation signal among the plurality of speaker devices 2 in the system belongs. Therefore, the sound signal or the sound signal processing parameter is changed. The audio signal processing parameter refers to a parameter used for predetermined signal processing in the signal processing unit 22, and at least one of the plurality of parameters may be changed. The wireless communication unit 15 of the source device 1 transmits the audio signal or the audio signal processing parameter thus changed to the speaker group by wireless communication. For the speaker devices 2 belonging to other speaker groups, the audio signal and the audio signal processing parameter are not changed depending on the operation signal.

  The wireless communication unit 21 of the speaker device 2 belonging to the speaker group receives the sound signal or the sound signal processing parameter for the speaker group thus changed from the source device 1 by wireless communication. In the speaker device 2, the sound indicated by the received sound signal is output from the speaker unit 25.

  When adopting a configuration in which what is changed in the source device 1 is an audio signal, the speaker device 2 may output the audio signal as it is. On the other hand, when adopting a configuration in which the changed one is an audio signal processing parameter, the speaker device 2 uses the audio signal processing parameter to store the parameter stored in the memory in the signal processing unit 22 or the control unit 20. And using the parameters after rewriting, predetermined signal processing may be performed on the audio signal received thereafter (or simultaneously). As a result, the same audio output as when the audio signal is changed is possible.

  A more specific example of this system will be described with reference to FIGS. 2A is a schematic diagram showing an example of device arrangement in the system, FIG. 2B is a diagram showing devices in the apparatus arrangement of FIG. 2A, and FIGS. 3A to 3C are examples of channels of audio signals transmitted and reproduced in the system FIG.

  In the system illustrated in FIGS. 2A and 2B, six speaker devices SP1 to SP6 are installed in a room (audio room) where the source device 1 is installed, and two speaker devices SP7 and SP8 are installed in a remote room (living room). is set up. SP1 to SP8 are all speaker devices 2, but their speaker characteristics are different. Of course, speaker devices having the same speaker characteristics may also be included. In this example, each of the speaker devices SP1, SP2, SP3, SP4, SP5, SP6, SP7, SP8 is center (C), front left (L), front right (R), surround left (LS), It is assumed that the speaker device is for subwoofer (LFE), surround right (RS), left (L), and right (R) channels.

  The speaker devices SP1 to SP6 are speaker groups (hereinafter also simply referred to as “groups”) No. 0 (2a), speaker devices SP7 and SP8 are group Nos. 1 (2b). By storing the classified information in a memory or the like in the control unit 10 (or the signal processing unit 14 or the like) of the source device 1, the source device 1 belongs to which group 2a or 2b a certain speaker device belongs. Can be recognized. Therefore, even when the source device 1 receives the operation signal indicating the source device operation, it is possible to determine which group the speaker device 2 belongs to only by including information specific to the speaker device 2 that has transmitted the operation signal. Can be identified. The classified information may be stored as a channel map (channel map table), for example. Only examples divided into two groups are given, but the same idea can be applied to three or more groups.

  In this system, a case where the source device 1 transmits common data (audio signal data for all channels) to all of the eight speaker devices SP1 to SP8 as illustrated in FIG. 3A will be described. In this case, the speaker devices SP1, SP2, SP3, SP4, SP5, and SP6 belonging to the group 2a extract the audio signals of the channels C, L, R, LS, LFE, and RS, respectively, and output the audio to the group 2b. The speaker devices SP7 and SP8 to which they belong extract the audio signals of the channels LS, L, C, and channels C, R, and RS, respectively, and generate the left (La) and right (Ra) audio signals from these audio signals ( Downmix) and output.

  Next, as illustrated in FIG. 3B, the source device 1 has common data of the first content audio signal for the six speaker devices SP1 to SP6 and the second content audio signal for the two speaker devices SP7 and SP8. A case of transmitting (audio signal data for all channels of two contents) will be described. For simultaneous distribution of such two contents, if there are two channels for the channel of the source device 1 for 5.1ch and for 2ch (there may be two for channels of 5.1ch or more), that is, This is possible if the processing capability of the control unit 10, the audio input processing unit 13, and the signal processing unit 14 and the processing capability (communication bandwidth, etc.) of the wireless communication unit 15 are compatible with the distribution of two contents.

  In this case, the speaker devices SP1, SP2, SP3, SP4, SP5 and SP6 belonging to the group 2a respectively extract the audio signals of the channels C, L, R, LS, LFE and RS of the first content and output the audio. The speaker devices SP7 and SP8 belonging to the group 2b extract the audio signals of the second content channels LS, L, and C and the second content channels C, R, and RS, respectively, and use the left contents of the second content from the audio signals. (La) and right (Ra) audio signals are generated (downmixed) and output.

  As illustrated in FIG. 3C, the source device 1 has an audio signal of the first content for the six speaker devices SP1 to SP6, and a left content (La) and a right content for the second content for the two speaker devices SP7 and SP8 ( The case where the common data of the audio signal of the channel Ra) is transmitted will be described. In this case, first, with respect to the second content, the above-described downmixing is performed on the source device 1 side to generate audio signals of the channels La and Ra of the second content. The audio output in the group 2a is the same as in FIG. 3B. The speaker devices SP7 and SP8 belonging to the group 2b extract the audio signals of the channels La and Ra of the second content, respectively, and output the audio.

In the example of FIGS. 3B and 3C, an example in which two contents are multiplexed and distributed has been described. However, these contents are not limited to those received by the source device 1 from one source. As described above, the source device 1 is configured to be able to acquire content from both the communication unit 12 and the audio input terminal 11, or configured to be able to acquire content from two types of sources by the communication unit 12. Also good. In any case, in order for the source device 1 to deliver two or more contents, not only the ability to multiplex channels in the wireless communication unit 15 but also the contents in the audio input processing unit 13 are multiplexed. Ability (that is, the ability to process multiple contents) is required.
Unlike FIGS. 3A to 3C, the source device 1 and each speaker device 2 can communicate one-on-one.

  The source device operation preferably includes an operation of changing the characteristic (feature) of the sound indicated by the audio signal output from the source device 1, and as an example of such an operation, the source device operation that lowers the volume level by one step. An example of processing when the above is performed will be described with reference to FIGS. 4 and 5 are sequence diagrams for explaining an example of a volume lowering process procedure in the present system. Of course, the following examples can be similarly applied to operations for changing other sound characteristics such as a volume increasing operation and an operation for changing frequency characteristics. The change of the frequency characteristic can also be realized by changing a plurality of prepared music modes.

  Based on FIG. 4, an example will be described in which the audio signal is corrected on the speaker device 2 side as shown in FIG. 3A and the volume reduction operation is received by the speaker device SP7. First, when the speaker device SP7 receives a source device operation for reducing the volume in the communication unit 27 with the remote control code from the remote control 3 (step S1), the control unit 20 receives the remote control code from the communication unit 27, Is determined to transmit a volume lowering command, and is transmitted from the wireless communication unit 21 to the source device 1 (step S2). Specific information of the speaker device SP7 itself is added to the command to be transmitted.

  In the source device 1, the wireless communication unit 15 receives the volume reduction command from the speaker device SP7, and the control unit 10 interprets the command (step S3). 1 (2b) is specified (confirmed) (step S4). Since the speaker device SP8 is also in the same room, it is possible to send the same command. However, when the same command is received from the speaker device in the same group, the device with the lowest ID is adopted. Arbitration may be performed such as ignoring other ID commands. Further, for example, by providing the communication unit 27 for only one master device among the speaker device groups belonging to the same group (or by not ignoring the operation of the source device from the remote controller 3), such arbitration is not performed. It will be over.

  Next, the control unit 10 causes the signal processing unit 14 to generate an instruction including a parameter for lowering the volume in the speaker devices SP7 and SP8 belonging to the group 2b, and transmits the instruction to the wireless communication unit 15 (step S5). In the speaker devices SP7 and SP8 that have received this instruction at the wireless communication unit 21, the control unit 20 receives the instruction, outputs an instruction to lower the volume level to the volume adjusting unit 23, and lowers the volume level at the AMP 24. (Steps S6 and S7). Thereby, the speaker devices SP7 and SP8 can output a sound whose volume level is lowered by one step. On the other hand, there is no change in volume for speaker devices SP1 to SP6 that do not belong to group 2b (step S8). As a result, the volume of only the speaker device group of group 2b is reduced, the volume of the speaker device group of group 2a is not changed, and the listener in a room other than the operated room is not operated, and the listener can listen without any sense of incongruity. Can be continued.

  Based on FIG. 5, an example will be described in which an audio signal is corrected on the source device 1 side as shown in FIG. 3C and a volume lowering operation is received by the speaker device SP7. First, the same processing as steps S1 to S4 is performed (steps S11 to S14). Next, the control unit 10 instructs the signal processing unit 14 to lower the volume level for the channels La and Ra of the second content to be transmitted to the speaker devices SP7 and SP8 belonging to the group 2b. Accordingly, the audio signals of the channels La and Ra are changed and transmitted to the wireless communication unit 15 (step S15). The speaker devices SP7 and SP8 that have received such an audio signal can output a sound whose volume level is lowered by one step by reproducing it as it is. On the other hand, there is no change in volume for speaker devices SP1 to SP6 that do not belong to group 2b (step S18). The result in this case also does not give the listener a sense of incongruity as in the example of FIG.

  As described above, in the system shown in FIG. 2A, a speaker group is constructed for each room, and the same content is listened to in a plurality of rooms. Therefore, the operation does not affect the sound output from the speaker group in another room. That is, in this system, the sound characteristics can be easily changed for each room. Although a room at home has been taken as an example, the present invention is not limited to this, and processing for each installation location of a speaker group (speaker system) is possible. For example, as a speaker group that is different for each private room of a restaurant, sound (or different content) having different characteristics for each private room can be output. Even when the function of the source device 1 is installed in the terminal device, the remote device or the like of both the source device 1 and the speaker device 1 may be shared. In that case, the source device 1 is carried around and will be described later. You can go to the location of the speaker group and change only the sound at that location.

  As in this example, according to this system, when a plurality of speaker devices 2 included in this system are divided into a plurality of groups and audio signals are reproduced for each group, the individual operation is performed on the group by the operation on the speaker device 2 side. Since the voice can be changed, user convenience can be improved.

  Although the present embodiment has been described with reference to the configuration example of FIG. 1, the present system is not limited to this, and for example, the following application examples can also be applied. For example, by providing both the operation buttons for all the speaker devices in the system and the operation buttons for all the speaker devices belonging to the group on the remote controller 3, the user can select and operate the sound change target. .

  Further, the description has been made on the assumption that one speaker device includes one speaker unit as the speaker unit 25, but one speaker device (including one wireless communication unit 21 inside) has a plurality of speaker units arranged. Such a speaker array device may be, for example, a speaker device having a plurality of speaker units such as three speaker units (tweeter, midrange, woofer) for high sound range, medium sound range, and low sound range. May be. Further, in one speaker device, the speaker unit 25 (or the AMP 24 and the speaker unit 25) may be configured as a separate housing from other parts. In this case, the operation unit 26 is attached to the speaker unit 25 side. It can also be configured to. When these configurations are adopted, the casings may basically be connected by wire. Of course, these application examples can be similarly applied to other embodiments described later.

(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIG. FIG. 6 is a sequence diagram for explaining an example of a content switching processing procedure in the voice radio transmission system according to the present embodiment. Although this embodiment will be described focusing on differences from the first embodiment, various examples of the first embodiment can be applied.

  The source device operation in the present embodiment includes any one of an operation for selecting content to be output as an audio signal from the source device 1 and an operation for changing the reproduction state of the content. That is, in the present embodiment, the speaker device 2 can accept an operation related to the content as the source device operation. Of course, the speaker device 2 may be configured to accept the operation of changing the sound characteristics described in the first embodiment. Further, the following example can be similarly applied to an operation for changing a content reproduction state (reproduction, stop, pause, fast forward, fast reverse, etc.).

  An example in which two contents are distributed from the source device 1 as shown in FIGS. 3B and 3C and a content switching operation is received by the speaker device SP7 will be described. Examples of the content selection operation include an operation of displaying a list of currently reproducible content on the display unit and selecting from the list, but here the simplest example is given here for the sake of simplicity. In this example, it is assumed that the content selection operation is an operation for skipping to the previous content or an operation for skipping to the subsequent content.

  First, when the speaker device SP7 receives a source device operation for switching contents in the communication unit 27 with the remote control code from the remote control 3 (step S21), the control unit 20 receives the remote control code from the communication unit 27, Is determined to transmit the content switching command, and is transmitted from the wireless communication unit 21 to the source device 1 (step S22). Specific information of the speaker device SP7 itself is added to the command to be transmitted.

  In the source device 1, the wireless communication unit 15 receives the content switching command from the speaker device SP7, and the control unit 10 interprets it (step S23). 1 (2b) is specified (confirmed) (step S24). The arbitration is the same as step S4.

  Next, the control unit 10 sends an instruction to switch the content to a new one for reproduction of the speaker devices SP7 and SP8 belonging to the group 2b to the audio input processing unit 13, and the content currently output by the audio input processing unit 13 Is instructed to switch contents via the audio input terminal 11 or the communication unit 12. In response to this instruction, the content after switching is reproduced (step S25), and distributed from the wireless communication unit 15 via the voice input processing unit 13 and the signal processing unit 14 (step S26). In the case of FIG. 3B, distribution is performed without downmixing, and in the case of FIG. 3C, distribution is performed after downmixing.

  The speaker devices SP7 and SP8 receive the distributed common data. In the case of FIG. 3B, the audio data for itself is extracted and then downmixed and output. In the case of FIG. 3C, the downmix for itself is output. Extracted voice data is extracted and output (steps S27 and S28). On the other hand, in the speaker devices SP1 to SP6, the content that has been conventionally reproduced is extracted and reproduced as it is (step S29). As a result, content switching occurs only in the group of speaker devices in group 2b, and the group of speaker devices in group 2a continues to output conventional content. Therefore, a listener in a room other than the operated room is not operating. You can continue listening without feeling uncomfortable.

  Here, it supplements about the audio | voice output in step S27, S28. Regardless of whether or not content switching is caused by source device operation as in the processing example of FIG. 6, there are scenes in which the number of channels is switched between contents when a plurality of contents are reproduced continuously. In this scene, since the sound quality changes in response to the change in the number of channels, the audio signal to be transmitted may be changed according to the speaker device 2 by correction processing such as downmixing even in the case of one-to-one communication. This correction process may be executed in accordance with the number of channels obtained by the source device 1.

  On the other hand, when distributing in a broadband or multicast manner, the channel extracted by the speaker device 2 itself is fixed so that the sound of a specific channel is extracted and output as it is on the speaker device 2 side. You can also. However, in order to cope with a change in sound quality, it is desirable in this case as well to generate a sound signal corresponding to the correction by downmixing or the like on the source device 1 side as necessary.

  As another method for dealing with a change in sound quality due to a change in the number of channels in the case of broadband or multicast distribution, the channel extracted by the speaker device 2 can be fixed. Such variable processing is particularly useful when correction processing such as downmixing is performed on the speaker device 2 side as in the speaker devices SP7 and SP8 to which the example of FIG. 3B is applied.

  The variable processing not only obtains information on the number of channels at the source device 1, but also transmits information on the number of channels to the speaker device, etc. (or information indicating the channel to be extracted) after switching. May be notified to the speaker devices SP7 and SP8 after step S24 or S25 and before step S26. Thereby, an appropriate sound can be output in steps S27 and S28.

  Also, the gap (noise) sound at the switching of the content can be eliminated by temporarily muting the audio output at the switching of the content. For example, first, a content switching notification is wirelessly transmitted to the speaker devices SP7 and SP8 after step S24 or S25, and the speaker devices SP7 and SP8 execute mute. Next, the source device 1 starts wireless transmission of new content in step S26, and thereafter, notifies the content switching completion, and the speaker devices SP7 and SP8 may cancel the mute. As a result, in steps S27 and S28, not only an appropriate sound can be output, but also the output of a gap sound can be prevented.

  Further, when a content switching operation is performed in a state where only one content is output as shown in FIG. 3A, the source device 1 acquires new content and uses the new channel slot in FIGS. 3B and 3C. For example, it may be distributed in addition to the common data.

  In addition, when the source device 1 is configured to be able to acquire content from two or more types of sources, skipping of content is performed by skipping forward and backward for the first and last content of one source, respectively. It may be possible to return to the end of the same source, but to switch to the first content of the previous and subsequent sources. The former may be adopted, and the latter operation may be separately defined as a source switching operation belonging to the content selection operation.

  As described above, in the system of FIG. 2A, a speaker group is constructed for each room, and the same content is listened to in a plurality of rooms. The device can be operated, and the operation does not affect the sound output from the speaker group in another room. That is, in this system, content can be easily changed for each installation location of the speaker system, such as for each room.

(Third embodiment)
As a third embodiment of the present invention, an example of communication control between a speaker device and a source device applicable to the first and second embodiments will be described with reference to FIGS. 7A to 11B. FIG. 7A, FIG. 7B, and FIG. 7C are sequence diagrams for explaining the first, second, and third communication methods used for communication processing in the voice radio transmission system according to the present embodiment, respectively. FIG. 8A is a diagram illustrating an example of a packet used for communication processing in the voice radio transmission system according to the present embodiment, and FIG. 8B is a diagram illustrating an example of contents described in each section of the packet in FIG. 8A.

  The minimum communication unit of signals related to control between the source device 1 (wireless transmitter) and the speaker device 2 (wireless receiver) includes the following three types (types) of communication methods, and a series of communication procedures ( Sequence) is a combination of these types. As described above, the audio signal is transmitted by wireless communication. However, this signal may be transmitted by wire.

  As a first communication method, when the wireless receiver is operated, the wireless receiver issues an instruction (Command), thereby requesting control from the wireless transmitter (step S41). In response to this instruction, the wireless transmitter returns an instruction response (Command Response) (step S42). As the second communication method, information or the like is requested by issuing a request (Request) from the wireless transmitter to the wireless receiver (step S43). In response to this request, the wireless receiver returns a request response (Request Response) (step S44). As a third communication method, the wireless transmitter issues a notification (Report) to the wireless receiver to notify the state change (step S45).

  As illustrated in FIG. 8A, the communication data format (packet) 41 used in these communication methods is a packet type (a type indicating which type of packet in steps S41 to S45), a packet ID, a self- The address, the address, the parameter length, the parameter, and a cyclic redundancy check value (CRC value) are included. Although the length and description of each section are not particularly described, they are as illustrated in Table 42 of FIG. 8B. Of course, not only the length and description of the packet, but also the parameter length and parameter description method for each packet type to be described later with reference to FIGS. 9A to 11B are not limited to those illustrated.

  The first communication method will be described. FIG. 9A is a diagram showing an example of a packet used for an instruction in the first communication method of FIG. 7A, and FIG. 9B is an example of an ID (command type) described in the packet of FIG. 9A and a parameter defined for each ID. FIG. 9C is a diagram illustrating an example of a packet used for an instruction response in the first communication method of FIG. 7A. FIG. 9D is defined for each ID (instruction type) and ID described in the packet of FIG. 9C. It is a figure which shows an example of a parameter.

  As shown in FIG. 9A, in the instruction packet 43 used in step S41, “00h” corresponding to the instruction is described in the packet type. The packet 43 is given an ID that means “description” in the table 44 of FIG. 9B, and a parameter (additional parameter) is added if necessary. For example, with respect to the instruction for lowering the volume value by one step (transmission in step S2) in the processing example of FIG. Further, the source device 1 can recognize that the instruction is from the speaker device SP7 by its own address. For the frequency change described as an application of the processing example of FIG. 4, an instruction for setting frequency characteristics with ID “0008” can be used.

  For example, for the content switching instruction (transmission in step S22) in the processing example of FIG. 6, the ID is “0004” and a value (not shown) indicating the previous skip (or subsequent skip) is added as an additional parameter. It will be. For the switching of the source input to the source device 1 described as an application of the processing example of FIG. 6, a sound source selection instruction with ID “0003” can be used.

  As shown in FIG. 9C, the instruction response packet 45 used in step S42 describes “01h” corresponding to the instruction response in the packet type. The packet 45 is given an ID indicating that it is described as “description” in the table 46 of FIG. 9D, and a parameter (additional parameter) is added as necessary. This ID is the same as the ID at the time of instruction. For example, as an instruction response (step S5) when the volume value is lowered by one level in the processing example of FIG. 4, the instruction execution result and the changed volume value are added as additional parameters with ID “0001”. .

  Further, for example, as an instruction response to the content switching instruction in the processing example of FIG. 6 (notification performed after step S26), the ID is “0004”, and an instruction execution result and a value (not shown) indicating the designation operation are added as additional parameters. Will be added. The value indicating the designation operation may be a value indicating that if the content is skipped before. As a result, not only the speaker device SP7 that performed the source device operation but also the speaker device SP8 can transmit this operation content and display it on the display unit.

  The second communication method will be described. 10A is a diagram illustrating an example of a packet used for a request in the second communication method of FIG. 7B, and FIG. 10B is an example of an ID (request type) described in the packet of FIG. 10A and a parameter defined for each ID. FIG. 10C is a diagram showing an example of a packet used for a request response in the second communication method of FIG. 7B. FIG. 10D is defined for each ID (request response type) and ID described in the packet of FIG. 10C. It is a figure which shows an example of a parameter.

  As shown in FIG. 10A, the request packet 51 used in step S43 describes “02h” corresponding to the request in the packet type. The packet 51 is given an ID that means “description” in the table 52 of FIG. 10B, and a parameter (additional parameter) is added as necessary. For example, when the frequency characteristic is set by an operation from the operation unit 16, the ID is “0004”, and the number of stations and four types of parameters are added as illustrated as additional parameters.

  As shown in FIG. 10C, the request response packet 53 used in step S44 describes “03h” corresponding to the request response in the packet type. The packet 53 is given an ID that means “description” in the table 54 of FIG. 10D, and a parameter (additional parameter) is added if necessary. This ID is the same as the ID at the time of instruction.

  The third communication method will be described. FIG. 11A is a diagram illustrating an example of a packet used for notification in the third communication method of FIG. 7C, and FIG. 11B is an example of an ID (notification type) described in the packet of FIG. 11A and a parameter defined for each ID. FIG.

  As shown in FIG. 11A, the request packet 61 used in step S45 describes “04h” corresponding to the notification by packet type. The packet 61 is given an ID that means “description” in the table 62 of FIG. 11B, and a parameter (additional parameter) is added as necessary. For example, for the notification of the sound source information change as exemplified as the notification at the time of the variable processing in the processing example of FIG. 6, the ID is “0000”, and a value indicating the change of the sound source information such as the number of channels as an additional parameter ( (Not shown) will be added.

(Other)
The system according to each embodiment of the present invention has been described above. However, this system may not employ the technology premised on WiSA. For example, in WiSA, each speaker device is equipped with an IC (Integrated Circuit) chip that can receive an audio signal wirelessly, but a plurality of signal processing units may be provided in one speaker device.

  The parts other than the speaker unit in the source device and the speaker device illustrated in FIG. 1 include hardware such as a peripheral device such as a microprocessor (or DSP), a memory, a bus, an interface, and a remote controller, and the hardware. It can be realized with software that can be executed in A part of the hardware can be mounted as an IC / IC chip set. In that case, the software may be stored in the memory. Also, all the components of the present invention may be configured by hardware, and in that case as well, a part of the hardware can be mounted as an IC / IC chip set.

  Further, a recording medium in which a program code of software for realizing the functions in the various configuration examples described above is recorded is supplied to the source device and the speaker device, and the program code is executed by the microprocessor or DSP in each device. This also achieves the object of the present invention. In this case, the software program code itself realizes the functions of the above-described various configuration examples. Even if the program code itself or a recording medium (external recording medium or internal storage device) on which the program code is recorded is used. The present invention can be configured by the control side reading and executing the code. Examples of the external recording medium include various media such as an optical disk such as a CD-ROM or a DVD-ROM and a non-volatile semiconductor memory such as a memory card. Examples of the internal storage device include various devices such as a hard disk and a semiconductor memory. The program code can be downloaded from the Internet and executed, or received from a broadcast wave and executed.

  The audio wireless transmission system according to the present invention has been described above. As described in the processing procedure, the present invention provides a plurality of grouped speaker devices and audio signals to the plurality of speaker devices. A form as a voice radio transmission method in a voice radio transmission system including a source device that transmits by radio communication may be employed.

  In this audio wireless transmission method, the speaker device receives a user operation for operating the source device, transmits an operation signal indicated by the user operation to the source device, and the source device includes the speaker device. A step of changing an audio signal or an audio signal processing parameter to be output to a speaker group to which the speaker device that is the transmission source of the operation signal among the plurality of speaker devices belongs, based on the operation signal received from And having. Other application examples are the same as those described for the audio wireless transmission system, and the description thereof is omitted.

  In other words, the program code itself is a program for causing the computer on the source device side and the computer on the speaker device side to execute the audio wireless transmission method. That is, the program receives the operation signal indicating the user operation for operating the source device, transmitted from the speaker device, to the computer on the source device side, and the plurality of the plurality of programs based on the operation signal. A step of changing a sound signal or a sound signal processing parameter to be output to a speaker group to which the speaker device that is the transmission source of the operation signal of the speaker devices belongs. Further, the program is based on a step of receiving a user operation for operating the source device in a computer on the speaker device side, transmitting an operation signal indicated by the user operation to the source device, and the operation signal. Receiving a radio signal or audio signal processing parameters for the speaker group to which the speaker device belongs, changed by the source device, from the source device by wireless communication. Other application examples are the same as those described for the audio wireless transmission system, and the description thereof is omitted.

DESCRIPTION OF SYMBOLS 1 ... Source device, 2, SP1, SP2, SP3, SP4, SP5, SP6, SP7, SP8 ... Speaker device, 2a, 2b ... Speaker group, 3 ... Remote control, 10 ... Control device of source device, 11 ... Audio input terminal , 12 ... Source device communication unit, 13 ... Audio input processing unit, 14 ... Source device signal processing unit, 15 ... Source device wireless communication unit, 16 ... Source device operation unit, 17 ... Display unit, 20 ... Speaker Device control unit, 21 ... Wireless communication unit of speaker device, 22 ... Signal processing unit of speaker device, 23 ... Volume control unit, 24 ... Amplifier unit (AMP), 25 ... Speaker unit, 26 ... Operation unit of speaker device, 27: A communication unit of the speaker device.

Claims (7)

An audio wireless transmission system comprising a plurality of speaker devices grouped and a source device that transmits audio signals to the plurality of speaker devices by wireless communication,
The speaker device accepts a user operation for operating the source device, transmits an operation signal indicated by the user operation to the source device,
Based on the operation signal received from the speaker device, the source device outputs an audio signal or sound to be output to the speaker group to which the speaker device that is the transmission source of the operation signal of the plurality of speaker devices belongs. A voice radio transmission system characterized by changing a parameter for signal processing.   The user operation includes any one of an operation of changing a sound characteristic indicated by the audio signal, an operation of selecting content to be output as the audio signal, and an operation of changing a reproduction state of the content. 2. The voice radio transmission system according to claim 1, wherein   The voice according to claim 1, wherein the speaker device includes a receiving unit that receives a signal transmitted from a remote controller, and the user operation can be received by receiving the signal. Wireless transmission system.   The audio wireless transmission system according to claim 1, wherein the speaker device transmits the operation signal to the source device by wireless communication.   The voice radio transmission system according to claim 1, wherein the voice signal transmitted from the source device is an uncompressed signal. One speaker device among the plurality of speaker devices that receives the sound signal from a source device that transmits the sound signal by wireless communication to a plurality of speaker devices grouped,
The speaker device accepts a user operation for operating the source device, transmits an operation signal indicated by the user operation to the source device,
A speaker device that receives, by radio communication, an audio signal or an audio signal processing parameter for a speaker group to which the speaker device belongs, which has been changed by the source device based on the operation signal, from the source device. A source device that transmits an audio signal to a plurality of grouped speaker devices by wireless communication,
Receiving an operation signal transmitted from the speaker device and indicating a user operation for operating the source device;
Based on the operation signal, an audio signal or a parameter for audio signal processing to be output to a speaker group to which the speaker device that is the transmission source of the operation signal among the plurality of speaker devices belongs is changed. Source equipment.

Images