WO2015087729A1

WO2015087729A1 - Voice radio transmission system, speaker device, and source device

Info

Publication number: WO2015087729A1
Application number: PCT/JP2014/081719
Authority: WO
Inventors: 滋大久保; 小田　守
Original assignee: シャープ株式会社
Priority date: 2013-12-09
Filing date: 2014-12-01
Publication date: 2015-06-18

Abstract

　The present invention provides a voice radio transmission system which, when transmitting a voice signal by radio and reproducing the transmitted voice signal, can ascertain the characteristics of a speaker device on a source device side and can perform tone control that corresponds to the characteristics of the speaker device. This system is provided with speaker devices (illustrated by speaker devices (2a, 2b)) and a source device (1). The speaker device has a signal processing unit (22) for applying prescribed signal processing to the voice signal received by radio communication from the source device (1), and a speaker unit (26) for outputting a voice indicated by the voice signal after the voice signal is processed by the signal processing unit (22). The source device (1) acquires, by radio communication from the speaker device, characteristic information pertaining to voice output by the speaker device; obtains a parameter for the prescribed signal processing from the characteristic information; and transmits the parameter by radio communication to the speaker device. The signal processing unit (22) sets the parameter received from the source device (1), and applies the prescribed signal processing in accordance with the set parameter.

Description

Audio wireless transmission system, speaker device, and source device

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.

In recent years, an increasing number of AV (Audio Visual) devices use wireless communication, and audio is also WiFi (registered trademark, the same applies hereinafter), ZigBee (registered trademark, the same applies hereinafter), Bluetooth (registered trademark, the same applies hereinafter). Etc.) or the like. However, the current voice radio transmission is targeted for compressed voice.

Patent Document 1 discloses an audio reproduction device that transmits frequency characteristics of a speaker to a server when audio data is wirelessly received from the server. The server is configured to compress the audio data in accordance with the frequency characteristics and transfer the compressed audio data to the audio reproduction device, and the audio reproduction device is configured to receive and reproduce the compressed audio data. ing. The system composed of the audio reproduction device and the server described in Patent Document 1 can reduce the amount of audio data to be transferred by such a configuration.

JP 2004-177766 A

As described above, since the current voice radio transmission is targeted for compressed voice, it is not at the level for evaluating the sound quality. However, when a voice device is connected wirelessly, the usability is improved, so a high-quality that requires high sound quality is required. Wireless communication is also being promoted for audio equipment.

For example, WiSA (Wireless Speaker and Audio) Association is advancing the standardization of technology for wireless transmission of audio signals using uncompressed PCM (pulse code modulation). One of the specifications of WiSA is that the audio signals of all the channels to be used are transmitted as common data (same data) to all speaker devices without being compressed and uncorrected (as the original sound). In this method, since the amount of channel selection and correction (including equalizing processing, etc.) is arbitrarily determined on the speaker device side, a setting with a higher degree of freedom is possible. Such a setting can be executed by an instruction from the source side.

However, with this technology, when adjusting the volume and overall balance on the source side, which is the transmitting side, if the source side cannot grasp the basic characteristics of each speaker, it must be adjusted while actually listening. This makes adjustment extremely detour. For example, when a new speaker set is incorporated in an audio set, if the frequency characteristics and sound pressure characteristics of each speaker in the new speaker set are not grasped, level adjustment and equalization adjustment must be performed from 1 and extremely complicated work. It becomes.

Although the technique described in Patent Document 1 transmits the frequency characteristics of a speaker to a server on the source side and assumes wireless transmission of uncompressed audio data, this technique does not provide audio signals to be transmitted. In the case of non-compression, the sound is wirelessly transmitted without executing any processing according to the frequency characteristics, so that the sound quality cannot be improved.

The present invention has been made in view of the above-described circumstances, and an object of the present invention is to grasp the characteristics of a speaker device on the source device side when the audio signal is wirelessly transmitted and reproduced, and the characteristics of the speaker device. It is an object of the present invention to provide a voice radio transmission system capable of performing sound quality control according to the above.

In order to solve the above problems, a first technical means of the present invention is an audio wireless transmission system including a speaker device and a source device that transmits an audio signal to the speaker device by wireless communication. The speaker device includes a signal processing unit that performs predetermined signal processing on an audio signal received by wireless communication from the source device, and a speaker unit that outputs the sound indicated by the audio signal processed by the signal processing unit. The source device has a processing unit that obtains characteristic information related to audio output from the speaker device by wireless communication from the speaker device, and obtains the predetermined signal processing parameter from the characteristic information. And transmitting the parameter to the speaker device by wireless communication, the signal processing unit sets the parameter received from the source device, and the parameter according to the parameter Is obtained by said applying a constant signal processing.

According to a second technical means of the present invention, in the first technical means, the speaker device is provided with the signal processing unit and the speaker unit in a one-to-many relationship or in a one-to-one relationship. It is characterized by being provided.

According to a third technical means of the present invention, in the first or second technical means, the audio wireless transmission system includes the source device and the speaker device in a one-to-many relationship. It is a thing.

According to a fourth technical means of the present invention, in any one of the first to third technical means, the speaker unit is provided in the same casing as the signal processing unit.

According to a fifth technical means of the present invention, in any one of the first to third technical means, the speaker unit is provided in a housing different from the signal processing unit, and is connected to the signal processing unit by wire. It is characterized by being.

A sixth technical means of the present invention is a speaker device that receives an audio signal transmitted from a source device through wireless communication, and performs predetermined signal processing on the audio signal received from the source device through wireless communication. A signal processing unit, and a speaker unit that outputs the sound indicated by the audio signal processed by the signal processing unit, and transmits characteristic information related to audio output by the speaker device to the source device by wireless communication. The predetermined signal processing parameter obtained from the characteristic information in the source device is received by wireless communication from the source device, and the signal processing unit sets the parameter received from the source device. The predetermined signal processing is performed according to the parameters.

A seventh technical means of the present invention is a source device that transmits an audio signal to a speaker device by wireless communication, and the speaker device performs a predetermined operation on an audio signal received from the source device by wireless communication. A signal processing unit that performs signal processing; and a speaker unit that outputs a sound indicated by an audio signal processed by the signal processing unit, wherein the source device stores characteristic information related to sound output by the speaker device. A processing unit that obtains the predetermined parameter for signal processing from the characteristic information by wireless communication from the speaker device, and transmits the parameter to the speaker device by wireless communication.

According to the present invention, when an audio signal is wirelessly transmitted from a source device and reproduced, the audio signal received by the reproduction-side speaker device is corrected to a sound quality corresponding to the characteristics of the speaker device and then output as audio. It becomes possible and the sound quality can be improved.

It is a block diagram which shows the conventional audio | voice radio transmission system. 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 block diagram which shows the other structural example of the audio | voice radio | wireless transmission system which concerns on the 1st Embodiment of this invention. It is a sequence diagram for demonstrating an example of the process sequence in the audio | voice radio | wireless transmission system of FIG. It is a block diagram which shows the other structural example of the audio | voice radio | wireless transmission system which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the other structural example of the audio | voice radio | wireless transmission system which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the other structural example of the audio | voice radio | wireless transmission system which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the parameter by the side of the speaker apparatus in the audio | voice radio | wireless transmission system which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of Channel Info among the parameters of FIG. 7A. It is a figure which shows an example of an error status among the parameters of FIG. 7A. It is a figure which shows an example of LPF / HPF among the parameters of FIG. 7A. It is a figure which shows an example of EQ among the parameters of FIG. 7A. It is a figure which shows the specific example of the parameter of FIG. 7A. It is a sequence diagram for demonstrating an example of the process sequence 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 other example of the process sequence in the audio | voice radio | wireless transmission system which concerns on the 2nd Embodiment of this invention. It is a figure which shows an example of the transmission parameter transmitted to the speaker apparatus side from the source apparatus side 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 Filter Type of the parameter of FIG. 10A. It is a figure which shows an example of the detailed parameter of Gain of the parameter of FIG. 10B. It is a figure which shows an example of the detailed parameter of EQ of the parameter of FIG. 10B. It is a figure which shows an example of the detailed parameter of LPF / HPF of the parameter of FIG. 10B. It is a figure which shows an example of the detailed parameter of Polarity of the parameter of FIG. 10B. It is a figure which shows an example of the detailed parameter of Delay of the parameter of FIG. 10B. It is a sequence diagram for demonstrating an example of the process sequence 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 other example of the process sequence 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 other example of the process sequence in the audio | voice radio | wireless transmission system which concerns on the 3rd Embodiment of this invention.

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. Examples of the source device include 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 disc drive) player, and a television device. And PC (Personal Computer). 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, a center speaker may be provided in a housing of a display unit in a television device, and speakers for other channels may 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)
Prior to the description of the first embodiment of the present invention, a conventional voice radio transmission process will be described with reference to FIG. 1A. FIG. 1A is a block diagram showing a conventional voice radio transmission system (hereinafter referred to as a conventional system).
In the conventional system shown in FIG. 1A, audio signals are transmitted wirelessly from a source device So to a plurality of speaker devices (illustrated by Lch speaker device SpL and Rch speaker device SpR). Each of the speaker devices SpL and SpR has at least a speaker portion sp. Although not shown, the source device So and the speaker devices SpL and SpR have a wireless communication function.

The source device So includes a signal processing unit (sound correction unit) Ss that performs signal processing for correcting the gain and phase for each frequency of the sound. This signal processing unit Ss is generally called an equalizer or an equalizing processing unit. The audio signal corrected by the signal processing unit Ss is divided into an audio signal to be transmitted to the Lch speaker device SpL and an audio signal to be transmitted to the Rch speaker device SpR and transmitted individually.

The Lch speaker device SpL acquires the audio signal (Lch correction data) after being corrected for the Lch. The Rch speaker device SpR acquires the audio signal (Rch correction data) after being corrected for the Rch.

Here, in the conventional system, the Lch speaker device SpL cannot acquire the Rch correction data, and vice versa. Each of the speaker devices SpL and SpR does not include a signal processing unit (sound correction unit) and outputs the sound indicated by the received sound signal as it is from the speaker unit sp.

FIG. 1B is a block diagram showing a configuration example of the voice radio transmission system according to the first embodiment of the present invention. The system illustrated in FIG. 1B transmits audio signals wirelessly from the source device 1 to a plurality of speaker devices (illustrated by the Lch speaker device 2a and the Rch speaker device 2b). This is the same as the system. Both the

speaker devices

2 a and 2 b have a speaker unit 26. Although not shown, the source device 1 and the

speaker devices

2a and 2b have a wireless communication function. Further, the number of speaker devices is not limited to two.

However, unlike the conventional system, the system illustrated in FIG. 1B needs to include a signal processing unit (audio correction unit) that individually corrects the Lch and Rch audio signals in the source device 1. In principle, the correction is not performed and the original sound is transmitted as it is to the

speaker devices

2a and 2b.

Here, the audio signals for Lch and Rch are transmitted in a broadcast or multicast manner as common data without being divided. In this way, the source device 1 does not perform equalizing processing that matches the characteristics of the

speaker devices

2a and 2b on the plurality of

speaker devices

2a and 2b, and does not perform the non-equalization for a plurality of channels (in this example, two channels). A compressed audio signal is transmitted by wireless communication.

The

speaker devices

2a and 2b receive uncompressed audio signals for a plurality of channels transmitted by wireless communication from the source device, perform predetermined signal processing including equalizing processing on the audio signals of predetermined channels, and perform signal processing. The voice indicated by the voice signal is output. Therefore, the speaker device 2a includes a signal processing unit 22 that performs predetermined signal processing including equalizing processing on an audio signal of a predetermined channel received by wireless communication from the source device 1. Similarly, the speaker device 2b includes a signal processing unit 22.

However, the predetermined channel is usually different between the speaker device 2a and the speaker device 2b. The predetermined channel indicates Lch in the case of the speaker device 2a, and Rch in the case of the speaker device 2b. That is, the Lch speaker device 2 a acquires (extracts) an Lch audio signal from the received common data and outputs it to the signal processing unit 22. Similarly, the Rch speaker device 2b acquires (extracts) an Rch audio signal from the received common data, and outputs it to the signal processing unit 22.

The above equalizing processing includes signal processing for correcting the gain and phase for each frequency of the sound as described above. Therefore, it can be said that the signal processing unit 22 is an audio correction unit. The sound indicated by the sound signal processed (after correction) by the signal processing unit 22 is output from the speaker unit 26.

In the system illustrated in FIG. 1B, the parameter information of the speaker device 2a from the speaker device 2a to the source device 1 includes the vendor name, model name, speaker position, speaker characteristics, amplifier characteristics, and equalizing processing characteristics. Send at least one piece of information.

The speaker position refers to, for example, either right / left in the case of 2ch audio signal, and any of left front / right front / center / left rear / right rear / subwoofer in the case of 5.1ch audio signal. Point to. The equalizing processing characteristic refers to the processing characteristic of the equalizer of the speaker device 2a.

Similarly, the parameter information of the speaker device 2b is transmitted from the speaker device 2b to the source device 1. It can be said that the information is characteristic information related to the characteristics of the speaker device 2a. Here, the information transmitted from the speaker device 2a and the information transmitted from the speaker device 2b may be at least one information described above, and may be different types of information.

Thus, the source device 1 receives at least one piece of information as parameter information of the speaker device 2a from the speaker device 2a. Similarly, the speaker device 2b receives the at least one piece of information as parameter information of the speaker device 2b. As a result, the characteristics of the speaker device on the reproduction side can be grasped on the source device side.

The characteristics of the

speaker devices

2a and 2b grasped by the source device 1 can be used to generate parameters for correcting sound quality (information for changing equalizing processing characteristics) in the

speaker devices

2a and 2b, respectively. That is, the at least one information can be collected in order to cause the speaker device to perform sound quality adjustment in accordance with the characteristics of the speaker device and to perform sound output. Actually, in the WiSA standard, it is required to transmit an audio signal with the original sound from the source device 1 (in other words, the audio signal output from the source device 1 is defined as the original sound). Will be done by the side.

When used in this way, the source device 1 may be configured to transmit information for changing the equalizing processing characteristics to the

speaker devices

2a and 2b in accordance with the parameter information. This information may also be configured to be distributed by broadband or multicast wireless communication like the audio signal, and the information for itself may be extracted on the

speaker devices

2a and 2b side.

However, since this information does not need to be transmitted at all, and it is only necessary to transmit it at the time of installation of the speaker device, a configuration in which a communication destination is specified and distributed by wireless communication in a unicast manner should be adopted. You can also. It is also possible to adopt a configuration in which a wired connection is made only during installation and this information is transmitted via a wired cable.

Note that, even when the source device 1 does not receive the equalizing processing characteristic itself from the speaker device side, the source device 1 generates information for changing the equalizing processing characteristic from other information and transmits the information to the speaker device. For example, even if only the vendor name or the model name is used, if the source device 1 has the characteristics of the speaker device with respect to the vendor name or model name, information (parameter) for changing the equalizing processing characteristics is called up to the speaker device. Can be sent to.

As a result, it is possible to perform parameter setting (parameter update) on the

speaker devices

2a and 2b side. As a result, the audio signal received by the

speaker devices

2a and 2b on the reproduction side is converted into characteristics for each

speaker device

2a and 2b. The sound can be output after being corrected to the corresponding sound quality, and the sound quality can be improved.

In addition, since the source device 1 employs a method of transmitting an audio signal in a broadcast or multicast manner, the transmitted data is received in an adjacent room, and is listened after being corrected in accordance with the room. It is also possible. Further, by adopting a method of specifying and distributing a group like multicast distribution, even when a plurality of speaker systems are installed in the same room or nearby rooms for one source device 1 The sound quality correction process suitable for the characteristics of the speaker device in the system can be performed for each speaker system.

Further, in FIG. 1B, the signal processing unit 22 and the speaker unit 26 are illustrated as being in the same housing. However, the signal processing unit 22 is not limited to the speaker unit 2a and / or the speaker unit 2b. It may be configured to be included in a separate housing from the other housing. In that case, wireless communication is performed on the housing side having the signal processing unit 22, and the housing side having the speaker unit 26 may be connected by a wired cable. In other words, the housing having the signal processing unit 22 may be provided with a wireless communication function and a connection unit for connecting to the speaker unit 26 with a wired cable. Thereby, it can respond to various arrangements.

In addition, the

speaker devices

2a and 2b usually have an amplifier unit (not shown), but the signal processing unit 22 is provided in a separate case even if the signal processing unit 22 is provided in the same case as the amplifier unit and the speaker unit 26. It may be done. Note that the characteristics of the amplifier section refer to the amplifier characteristics.

The

speaker devices

2a and 2b may independently transmit the parameter information individually at a predetermined timing, but the

speaker devices

2a and 2b transmit the parameter information in response to a request from the source device 1. It is preferable to do. Thereby, each

speaker apparatus

2a, 2b does not need to transmit parameter information spontaneously.

FIG. 2 is a block diagram showing another configuration example of the voice radio transmission system according to the present embodiment, and FIG. 3 is a sequence diagram for explaining an example of a processing procedure in the voice radio transmission system of FIG.
As in the system illustrated in FIG. 1B, the audio wireless transmission system illustrated in FIG. 2 includes a source device 1 that is a source of an audio signal and

speaker devices

2a and 2b that are the receiver side (reproduction side) of the audio signal. Prepare.

The audio wireless transmission system of this configuration example includes two

speaker devices

2a and 2b arranged for each channel, the speaker device 2a reproduces the audio signal of the left channel (Lch), and the speaker device 2b receives the right channel ( (Rch) audio signal is assumed to be reproduced.

However, the number of speaker devices is not limited to this, and the same applies to three or more speaker devices. For example, six speaker devices can be included in the audio wireless transmission system for reproduction of 5.1ch audio signals. Further, in the audio wireless transmission system according to the present embodiment, the source device and the speaker device are provided in a one-to-many relationship as described above, and thereby the above-described sound quality improvement effect can be further obtained. However, even when the source device and the speaker device are configured in a one-to-one relationship, the processing according to the present embodiment can be similarly applied.

The source device 1 includes a main control unit 10 that controls the entire device via a bus and a wireless communication unit 14. The main control unit 10 is composed of, for example, a CPU (Central Processing Unit). By providing the wireless communication unit 14, the source device 1 can function as a wireless transmitter that transmits uncompressed audio signals to the

speaker devices

2a and 2b by wireless communication. The source device 1 has a built-in memory 13.

Each of the

speaker devices

2a and 2b includes a main control unit 20 that controls the whole via a bus and a wireless communication unit 21. The main control unit 20 is composed of, for example, a CPU. By providing the wireless communication unit 21, the

speaker devices

2 a and 2 b can function as a wireless receiver that receives an audio signal transmitted from the source device 1 by wireless communication. As the wireless communication unit 14 and the wireless communication unit 21, for example, modules on the transmission side and the reception side that are being standardized by WiSA Association can be applied.

In addition, each of the

speaker devices

2a and 2b outputs a signal processing unit 22 that performs predetermined signal processing on the audio signal received by the wireless communication unit 21, and the sound indicated by the audio signal processed by the signal processing unit 22.

Speaker units

26t, 26m, and 26w.

Here, the

speaker units

26t, 26m, and 26w indicate tweeter, midrange, and woofer speakers, respectively, but the number and combination of the speaker units are not limited thereto. Examples of the predetermined signal processing include processing (for example, equalizing processing, filter processing, etc.) in which the output content can be changed according to various parameters in an example described later. This parameter is stored in the memory 23 and is read and written as necessary.

Also, each of the

speaker devices

2a and 2b includes amplifier units (AMP) 25t, 25m, and 25w that amplify the audio signals processed by the signal processing unit 22 and output the amplified audio signals to the

speaker units

26t, 26m, and 26w, respectively. In addition, D / A converters (DACs) 24t, 24m, and 24w that convert digital signals into analog signals are provided in front of the

amplifier units

25t, 25m, and 25w, respectively. The signal processing unit 22 outputs different audio signals (audio signals to be output from the

speaker units

26t, 26m, and 26w via the

amplifier units

25t, 25m, and 25w) to the DACs 24t, 24m, and 24w, respectively. Become.

The source device 1 of this configuration example includes a High-Definition Multimedia Interface (HDMI; registered trademark; the same applies hereinafter) processing unit 11 and a microphone input unit 15, and is connected to the HDMI processing unit 11 (not shown). An input unit and an HDMI output unit are also provided. The microphone input unit 15 is provided, for example, in a remote controller for the source device 1 or is wired at the listener's position, and outputs sound output in a listening environment (installation environment of each

speaker device

2a, 2b). input.

The source device 1 also includes a signal processing unit 12 that performs other predetermined signal processing on the audio signal output from the HDMI processing unit 11. Of course, the signal processing in the signal processing unit 12 is processing different from the predetermined signal processing in the signal processing unit 22, and includes at least equalizing processing that matches the characteristics of the speaker device 2a and the characteristics of the speaker device 2b. Absent. As illustrated in FIG. 1B, the source device 1 may not be provided with the signal processing unit 12 and may be passed to the wireless communication unit 14 as the original sound.

Signal processing in the signal processing unit 12 includes, for example, processing for changing the sound quality according to a user operation on an input sound signal, and correcting the sound signal of each channel before transmission according to environmental characteristic information. Examples include correction processing.

Here, the environmental characteristic information is based on the input sound input from the microphone input unit 15 or on the basis of the input sound input and information indicating a channel acquired as part of characteristic information described later. What is necessary is just to obtain | require by the signal processing part 12 as information which shows the characteristic of the installation environment (listening environment) of

apparatus

2a, 2b. The calculation may be performed by actually performing an operation or simply referring to a correspondence table stored in advance. As exemplified by the microphone input unit 15 and the wireless communication unit 14, the source device 1 may include an input unit that inputs environment characteristic information indicating characteristics of the installation environment of the

speaker devices

2a and 2b. Of course, it is not necessary to provide this input part and the site | part which performs the said correction process.

The HDMI processing unit 11 extracts an audio signal from the signal input from the HDMI input unit, and wirelessly transmits the audio signal (Lch audio signal and Rch audio signal) by the wireless communication unit 14 via the signal processing unit 12. To transmit. The Lch audio signal and the Rch audio signal wirelessly transmitted in this way are received and extracted by the radio communication units 21 of the

speaker devices

2a and 2b, respectively, and are output to the signal processing unit 22.

Note that the description has been made on the assumption that the audio signal is HDMI input in the source device 1, but the present invention is not limited to this, and may be input by another input module or provided separately in the source device 1. It is also possible to adopt a configuration in which an audio signal stored in the storage unit is read and passed to the signal processing unit 12.

The source device 1 has a processing unit that obtains the at least one information (characteristic information) from the

speaker devices

2a and 2b by wireless communication and obtains the predetermined signal processing parameter from the characteristic information. The parameter is transmitted to the

speaker devices

2a and 2b by wireless communication. The processing unit may store in advance a correspondence table in which the correspondence between the characteristic information and the parameter is stored, and read the parameter with reference to the correspondence table using the characteristic information as a key. However, the processing unit may calculate (generate) the parameter by actually calculating from the characteristic information. That is, the processing unit can be provided as a calculation unit (generation unit). In the following description, it is assumed that the processing unit is included in the signal processing unit 12, that is, the signal processing unit 12 also performs processing of the processing unit. However, the processing unit may be provided separately. Although not specifically mentioned below, the characteristic information can be acquired via a wired cable as described above.

The characteristic information is information indicating characteristics related to sound output by the

speaker devices

2a and 2b (that is, characteristics related to sound output from the

speaker devices

2a and 2b), for example, the

speaker units

26t, 26m, and 26w. This corresponds to information indicating speaker characteristics (frequency characteristics, etc.). Actually, tweeter, midrange, and woofer are speakers with different output bands (that is, speakers having such characteristics).

The characteristic information is information stored in the memory 23 as the predetermined signal processing parameter, and the predetermined signal processing parameter is included in the specifications of the speaker device. The characteristic information only needs to include at least a part of the predetermined signal processing parameter, but may include information other than the predetermined signal processing parameter, for example.

The characteristic information is acquired by the processing unit of the signal processing unit 12 from the memory 23 of each of the

speaker devices

2 a and 2 b via the wireless communication unit 21 by instructing the wireless communication unit 14. As described above, an example is given in which the characteristic information in the

speaker devices

2a and 2b is stored in the

speaker devices

2a and 2b as the predetermined signal processing parameters, respectively. The processing will be briefly described.

First, the source device 1 wirelessly transmits a parameter request for requesting parameter transmission to the speaker device 2a in order to confirm all parameters in the speaker device 2a (step S1). In response to the parameter request, the speaker device 2a wirelessly returns the parameter to the source device 1 (step S2). The speaker device 2b is also subjected to the same processing as steps S1 and S2 (steps S3 and S4). Although an example was given in which parameters were acquired from the speaker device 2a and then parameters were acquired from the speaker device 2b, the reverse may be possible.

Similarly, when three or more speaker devices are connected to the source device 1, parameters may be acquired from each speaker device in the same manner, and the acquisition order may be matched with the order of connection to the source device 1. That's fine. This point is basically the same in a sequence diagram to be described later.

On the other hand, parameters (hereinafter referred to as transmission parameters) transmitted from the source device 1 to each of the

speaker devices

2a and 2b are part (or all) of the predetermined signal processing parameters as required. It is obtained by the processing unit so as to be different from the contents in the memory 23. That is, the transmission parameter is obtained and transmitted to each of the

speaker devices

2a and 2b.

Further, the description will be made on the assumption that the characteristic information is transmitted by the wireless communication unit 21 and received by the wireless communication unit 14, and the transmission parameter is transmitted by the wireless communication unit 14 and received by the wireless communication unit 21. On the other hand, a separate wireless communication unit may be provided in the

speaker devices

2a and 2b for transmission of characteristic information and reception of transmission parameters, and wireless communication is performed separately for the source device 1 for reception of characteristic information and transmission of transmission parameters. A communication unit may be provided. As the separately provided characteristic information and wireless communication units for transmission parameters, wireless communication units of the above-described standards such as WiFi, ZigBee, and Bluetooth can be employed.

Then, each of the

speaker devices

2a and 2b uses the transmission parameter received by the wireless communication unit 21 to rewrite the parameter in the memory 23 so that it can be used for the predetermined signal processing in the signal processing unit 22. The transmission parameter received from the device 1 is set. Finally, the

speaker devices

2a and 2b perform the predetermined signal processing according to the set parameters.

Note that the timing of obtaining the characteristic information is not limited. For example, the source device 1 recognizes speaker devices when the power is turned on or periodically, and acquires the characteristic information of the speaker devices when the speaker devices are recognized and stores them in the built-in memory 13. Reference may be made at the time of processing in the processing unit.

Thus, by performing parameter setting (parameter update) from the source device 1 side, when the audio signal is wirelessly transmitted and reproduced, the audio signal received by the reproduction-

side speaker devices

2a and 2b is converted into the

speaker devices

2a and 2b. It is possible to output the sound after correcting the sound quality according to the characteristics of each, and the sound quality can be improved.

In addition, the processing unit includes characteristic information related to sound output from the

speaker units

26t, 26m, and 26w and the

amplifier units

25t, 25m, and 25w (in this configuration example, the frequency characteristics of the

speaker units

26t, 26m, and 26w and the

amplifier units

25t and 25m). , 25w rated output information, etc.) is obtained by wireless communication, and the predetermined signal processing parameters for the

speaker units

26t, 26m, 26w and the

amplifier units

25t, 25m, 25w are obtained from the characteristic information. It is preferable.

With this configuration, not only the characteristics of the

speaker units

26t, 26m, and 26w but also the characteristics of the

amplifier units

25t, 25m, and 25w can be taken into account, and parameters for the

speaker devices

2a and 2b can be set, and signal processing based on the parameters is performed. Can be output.

In the case where a plurality of sets of speaker units and amplifier units are provided as in this configuration example, parameters for each speaker unit and parameters for each amplifier unit may be obtained, transmitted, and updated. However, for example, either the parameter of each amplifier unit or the parameter of each speaker unit can be obtained and excluded from the transmission and update targets.

Further, the environmental characteristic information can be used to correct the audio signal before transmission by the signal processing unit 12 as described above, but in addition to such correction or instead of such correction, The processing unit of the signal processing unit 12 may be configured to obtain the predetermined signal processing parameter from the characteristic information and the environmental characteristic information. With such a configuration, parameters of each speaker device can be set in accordance with not only the performance of the speaker device but also the installation environment, and sound subjected to signal processing based on the parameter can be output.

As described above, in the configuration example of FIG. 2, the signal processing unit 22 and the speaker unit (speaker unit 26t, etc.) are provided in a one-to-many relationship in each of the

speaker devices

2a and 2b, and the speaker unit (speaker unit 26t). And the like are provided in the same housing as the signal processing unit 22. When the speaker unit is provided in the same housing as the signal processing unit, the amplifier unit in the front stage of the speaker unit is naturally provided in the same housing as the signal processing unit.

The example provided in the same housing in this way is set to output matched audio so that each speaker unit and each amplifier unit will not fail when distributed as a product. The system also has the advantage of being able to output good quality audio.

The voice radio transmission system according to the present embodiment is not limited to the configuration example of FIG. For example, the signal processing unit 22 and the speaker unit may be provided in a one-to-one relationship in each of the

speaker devices

2a and 2b. Thereby, it becomes possible to deal with arrangements of various relationships.

Other configuration examples will be described with reference to FIGS. In the following configuration example, only differences from the configuration example of FIG. 2 will be described. Therefore, for example, various application examples applied in the configuration example of FIG. 2 can be similarly applied, such as an example in which only one speaker device is provided for one source device.

In the configuration example shown in FIG. 4, the source device 1 is provided with a receiver 3a, an amplifier unit (AMP) 4a, and a speaker unit 5a (assuming a full-range speaker) as Lch speaker devices. In addition, a receiver 3b, an amplifier unit 4b, and a speaker unit 5b are also provided as Rch speaker devices.

Amplifier units

4a and 4b are connected to the

receivers

3a and 3b, respectively, and

speaker units

5a and 5b are connected to the

amplifier units

4a and 4b, respectively.

Each of the

receivers

3a and 3b includes a main control unit 30, a radio communication unit 31, a signal processing unit 32, a memory 33, and a DAC 34 for connecting the

amplifier units

4a and 4b, respectively. The unit 20, the wireless communication unit 21, the signal processing unit 22, the memory 23, and the DAC (for example, DAC 24m) perform basically the same processing. However, for example, the signal processing unit 32 performs the predetermined signal processing on the audio signal output to the one set of the amplifier unit 4a and the speaker unit 5a.

In the configuration example of FIG. 4, like the relationship between the signal processing unit 32 and the speaker unit 5a and the relationship between the signal processing unit 32 and the speaker unit 5b, the speaker device is provided with a one-to-one relationship between the signal processing unit and the speaker unit. It has been.

In the configuration example of FIG. 4, unlike the configuration example of FIG. 2, the

speaker units

5 a and 5 b are provided in different cases from the signal processing unit 32 of the

receivers

3 a and 3 b, and the signals of the

receivers

3 a and 3 b are provided. It is connected to the processing unit 32 by wire. Thereby, the audio wireless transmission system of this embodiment can be used and the effect can be enjoyed only by connecting the speaker already owned by the user to the receiver. In this configuration, the amplifier unit is basically provided in a different housing from the signal processing unit, and is connected to the signal processing unit by wire, like the speaker unit, but only the amplifier unit is the same as the signal processing unit. A configuration that is provided on the body can also be adopted.

As described above, in the configuration using the signal processing unit 32 and the

speaker units

5a and 5b in separate housings, the

receiver device

3a and 3b or the source device 1 on the speaker device side can input the above characteristic information about the speaker device by a user operation. It is advisable to prepare predetermined characteristic information that is configured as described above or that does not cause a failure in signal processing and use the predetermined characteristic information.

In particular, it can be said that it is more preferable that the receiver or the source device is configured so that the characteristic information about the speaker device can be input by a user operation, because accurate characteristic information can be set by the user. For example, a user operation can be received with a terminal device such as a smartphone, a button provided on a receiver, or a main body of a source device. If only the amplifier unit is provided in the same housing as the signal processing unit, the characteristic information of the amplifier unit circulates in a state stored in the memory 23 in advance, so that it is not necessary to perform such input.

In the configuration example shown in FIG. 5, the receiver device 6a, the amplifier units (AMP) 4at, 4am, 4aw, and the speaker units 5at, 5am, 5aw (tweeter, midrange, respectively) as the Lch speaker device with respect to the source device 1 are used. Similarly, a receiver 6b, amplifier units 4bt, 4bm, 4bw, and speaker units 5bt, 5bm, 5bw are also provided as Rch speaker devices.

Amplifier units 4at, 4am, 4aw are connected to the receiver 6a, and speaker units 5at, 5am, 5aw are connected to the amplifier units 4at, 4am, 4aw, respectively. In addition, amplifier units 4bt, 4bm, and 4bw are connected to the receiver 6b, and speaker units 5bt, 5bm, and 5bw are connected to the amplifier units 4bt, 4bm, and 4bw, respectively.

Each of the receivers 6a and 6b includes a main control unit 60, a radio communication unit 61, a signal processing unit 62, a memory 63, and

DACs

64t, 64m, and 64w, which are the main control unit 20 and the radio communication unit of FIG. 21, the signal processing unit 22, the memory 23, and the DACs 24t, 24m, and 24w perform basically the same processing. The DACs 64t, 64m, and 64w of the receiver 6a are connected to the amplifier units 4at, 4am, and 4aw, respectively, and the DACs 64t, 64m, and 64w of the receiver 6b are connected to the amplifier units 4bt, 4bm, and 4bw, respectively.

The speaker device in the configuration example of FIG. 5 is similar to the configuration example of FIG. 2, such as the relationship between the signal processing unit 62 and the speaker units 5at, 5am, and 5aw, and the relationship between the signal processing unit 62 and the speaker units 5bt, 5bm, and 5bw. Similarly, the signal processing unit and the speaker unit are provided in a one-to-many relationship. In the configuration example of FIG. 5, as in the configuration example of FIG. 4, the speaker units 5 at, 5 am, 5 aw, 5 bt, 5 bm, and 5 bw are provided in a different housing from the signal processing unit 62. Connected with.

In the configuration example shown in FIG. 6, a single channel is played by a plurality of speaker devices. First, in this configuration example, a receiver 7t, an amplifier unit (AMP) 4t, a speaker unit 5t (assuming a tweeter speaker), a receiver 7w, and an amplifier unit are used as Lch speaker devices for the source device 1. 4w and a speaker unit 5w (assuming a woofer speaker) are provided. Here, amplifier units 4t and 4w are connected to the

receivers

7t and 7w, respectively, and speaker units 5t and 5w are connected to the amplifier units 4t and 4w, respectively. Of course, the midrange set may be added to the system configuration by dividing the range into three.

The

receivers

7t and 7w each include a main control unit 70, a wireless communication unit 71, a signal processing unit 72, a memory 73, and a DAC 74 connected to the amplifier units 4t and 4w, respectively. These perform basically the same processing as the main control unit 30, the wireless communication unit 31, the signal processing unit 32, the memory 33, and the DAC 34 of FIG.

However, in the receiver 7t, for example, in order to generate an audio signal (tweeter audio signal) to be output to one set of the amplifier unit 4t and the speaker unit 5t, signal processing is performed on the received Lch audio signal. The predetermined signal processing in the unit 72 is executed. Similarly, in the receiver 7w, signal processing is performed on the received Lch audio signal in order to generate an audio signal (woofer audio signal) to be output to one set of the amplifier unit 4w and the speaker unit 5w. The predetermined signal processing in the unit 72 is executed.

Like the signal processing unit 72 and the speaker unit 5t, and the signal processing unit 72 and the speaker unit 5w, the speaker device in the configuration example of FIG. It is provided in relation to. In the configuration example of FIG. 6, as in the configuration example of FIG. 4, the speaker units 5 t and 5 w are provided in a housing different from the signal processing unit 72 and connected to the signal processing unit 72 by wire. However, in the configuration example of FIG. 6, unlike the configuration example of FIG. 4, two speaker devices receive and reproduce an audio signal for one channel.

Furthermore, in this configuration example, although not shown, the Rch speaker device has the same configuration as the Lch speaker device.

Also, the configuration examples shown in FIGS. 2 and 4 to 6 can be combined as appropriate. Since various combinations can be assumed, only one example will be given. For example, in the configuration example of FIG. 2, the speaker device 2a is disposed for the left front channel (Lch), the speaker device 2b is disposed for the right front channel (Rch), and is used for the left rear (left surround) channel (LSch). 4 and the right rear channel (RSch) can be configured such that the speaker devices (for example, the receiver 3a, the amplifier unit 4b, and the speaker unit 5a) of FIG. 4 are arranged. In this case, for example, the speaker device for the center channel may be provided in the same housing as the source device 1 and may be configured to perform wired transmission, may employ the speaker device 2a of FIG. The configuration may be adopted.

Furthermore, in the configuration examples of FIGS. 2 and 4 to 6 and the combination examples thereof, it is possible to adopt a configuration in which a single amplifier unit has a plurality of speaker units. In the case of this configuration, if a filter such as an LC filter for the target speaker unit is provided in front of each speaker unit as an output destination of the amplifier unit, that is, if a network filter is provided, it differs from each speaker unit. Output in the frequency band becomes possible.

Hereinafter, specific examples of the characteristic information and transmission parameters returned to the speaker device based on the characteristic information will be described. As described above, in the audio wireless transmission system according to the present embodiment, the source device side wirelessly transmits the audio signal as common data (same data) to all speaker devices without being compressed. Wireless transmission is performed without performing equalizing processing that matches at least the characteristics of the speaker device. Accordingly, it is important to set parameters at a site where predetermined signal processing including equalizing processing is performed in the speaker device. As a precondition for the setting, it is necessary to grasp the characteristics of the speaker device on the source device side sufficiently and sufficiently. Therefore, the parameter information (the characteristic information) transmitted from the speaker device to the source device is important.

However, examples of characteristic information and transmission parameters are not limited to the following examples, and characteristic information acquired by the source device 1 and transmission parameters transmitted by the source device 1 are only a part of the description. The description method is not limited to the following example.

First, a specific example of the characteristic information will be described with reference to FIGS. 7A to 7F. FIG. 7A is a diagram illustrating an example of parameters (characteristic information) on the speaker device side in the voice radio transmission system according to the present embodiment. 7B is a diagram illustrating an example of Channel Info among the parameters of FIG. 7A, FIG. 7C is a diagram illustrating an example of an error status among the parameters of FIG. 7A, and FIG. 7D is an example of LPF / HPF among the parameters of FIG. FIG. 7E is a diagram showing an example of EQ among the parameters in FIG. 7A. FIG. 7F is a diagram illustrating a specific example of the parameters in FIG. 7A.

As the characteristic information, information indicating the specification of the receiver as shown in Table 81 of FIG. 7A can be adopted. The specifications mainly include items such as vendor name and model name, channel information (information on the speaker position), various specifications of the speaker unit, specifications of the signal processing unit, and specifications of the amplifier unit. Various specifications of the speaker unit include speaker configuration (tweeter / midrange / woofer, etc.), resonance frequency, output power, output impedance, frequency characteristics, efficiency, etc. of each speaker. The specifications of the signal processing unit include filter characteristics that can be used for channel division and current setting values, equalizer type and number of bands and current setting values, supported sampling frequencies, and the like. The amplifier specifications include the rated output of the amplifier.

More specifically, in Table 81, Vendor® Name indicating the manufacturer name, Model® Name indicating the model name, and Channel® Info indicating the channel information are included as characteristic information. Vendor Name is represented by, for example, 3 characters of 5 bits each. In the example of Table 86 in FIG. 7F, “SHP” is 0x4D and 0x10. Model Name is 0x41422D31303030 if the model name is “AB-1000”. The device can be accurately identified by Vendor Name and Model Name. By knowing Vendor Name and Model Name on the source device side, it is possible to estimate the characteristics of the speaker unit, the amplifier unit, etc., and to confirm the characteristics without referring to other data from the past stored data.

The channel information is information indicating which channel's audio is to be output as shown in Table 82 of FIG. 7B, and each receiver outputs which channel by setting 1 to the corresponding bit. You can show what to do. For example, if it is a receiver for the left front channel (Lch), Channel Info1 = 0x04, Channel Info2 = 0x00, and if it is a receiver for the right front channel (Rch), Channel Info1 = 0x02, Channel Info2 = 0x00 It becomes. In the example of Table 86, they are 0x01 and 0x00 representing FR (front right). Channel Info can acquire the position and role of the speaker device from the source device. When it is desired to lower the volume on the front side, an instruction to lower the volume such as FR (front right), FL (front left), etc. is given from the source device to the corresponding speaker device.

Also, in Table 81, as the characteristic information, Speaker Info present indicating whether or not speaker information is included, Speaker Info Size indicating the size of the speaker information, SpeakerSType indicating the type of the speaker, and Speaker for distinguishing the speaker The index and information indicating various characteristics of the speaker (resonance frequency, output power, output impedance, rated frequency [upper limit], rated frequency [lower limit], efficiency, and polarity) are also included.

Explain about speaker types. As a speaker system, a 1-way speaker, a 2-way speaker, a 3-way speaker, and a 4-way speaker are made according to the number of units to be mounted. For example, a 1-way speaker is configured with a full range, a 2-way speaker is configured with a woofer + tweeter, and a 3-way speaker is configured with a woofer + skoker + tweeter.

In a speaker system of 2 Ways or more, it is necessary to prevent unnecessary signals from being input to each speaker unit so that the output sound of each speaker unit does not overlap, and the band of the signal input to each speaker unit is limited. There is a need. This processing may be performed on a signal amplified by the amplifier unit, or may be performed before the amplifier unit to provide an individual amplifier unit.

The former type has a configuration in which a plurality of speaker units are included for one amplifier unit as described above and includes a network, and a 2-way speaker and a 3-way speaker (Speaker Type are “0x02” and “0x03”, respectively). And so on. For example, in the configuration example of FIG. 4, the memory 33 may store a 1-way speaker (Speaker スピーカ Type “0x01”). The latter type is distinguished from a multi-2ch speaker, a multi-3ch speaker (Speaker Type is “0x12”, “0x13”, respectively). For example, as the multi-3ch speaker, the one exemplified in FIG.

In the example of Table 86, the Speaker Type is an AMP-Networkfilter and has two speakers.
The first speaker has a resonance frequency of 20 Hz, an output power of 30 W, an output impedance of 8Ω, a rated frequency of 20-2000 Hz, and an efficiency of 84 dB. The second speaker has a resonance frequency of 1000 Hz, an output power of 30 W, an output impedance of 8Ω, a rated frequency of 1000-30000 Hz, and an efficiency. 84 dB. The polarity of both the first speaker and the second speaker is normal. By obtaining such information, the source device can grasp the characteristics of the individual speakers in the speaker device and can make finer adjustments.

Further, in Table 81, as the characteristic information, AMP 示す Info Present indicating whether or not amplifier information is included, AMP Info アンプ Size indicating the size of the amplifier information, and information indicating various characteristics (output power, gain, Error status, DSP Info Present, DSP Info Size, LPF [Low Pass Filter], HPF [High Pass Filter], and EQ [Equalizer]) are also included. In addition, regarding the DSP, such a notation is adopted on the assumption that the amplifier unit is configured by Digital Signal Processor, but the configuration of the amplifier unit is not limited thereto. In the example of Table 86, the output power is 40 W, the gain is 0 dB, and there is no error.

For the error status, as shown in Table 83 of FIG. 7C, items such as system abnormality, clock abnormality, current offset, abnormal voltage, over temperature, power reduction, over current, etc. are provided and no error has occurred. For example, all values may be rewritten to “0”, and if an error occurs, the value of the error state that has occurred may be rewritten to “1”. Although not specifically shown, the DAC error status may be included as a part of the characteristic information in the same manner as the error status of the amplifier unit.

For LPF and HPF, as shown in Table 84 of FIG. 7D, for example, Filter Type1 and Filter Type2 indicating the filter type, maximum frequency L (Hz), minimum frequency L (Hz), maximum frequency H (Hz), minimum frequency Each of H (Hz), a setting filter indicating the currently set filter, its setting frequency L (Hz), and its setting frequency H (Hz) may be stored in the memory as characteristic information. Here, filter types are 8th order BW (Butterworth), 6th order BW, 4th order BW, 3rd order BW, 2nd order BW, 1st order, 4th order BSL (Bessel), 3rd order BSL, and 2nd order BSL. However, it is not limited to this. L and H represent the lower 1 byte and the upper 1 byte of the frequency, respectively.

As for EQ (equalizer), as shown in Table 85 of FIG. 7E, for example, the number of EQ indicating the number of frequency bands to be equalized, EQ Index for distinguishing the equalizer, and Filter Type indicating the type of filter used for the equalizer 1 and Filter Type 2, setting frequency L (Hz) of this filter (filter currently set), setting frequency L (Hz), setting frequency H (Hz), setting gain, and setting Q (variation) The Q value indicating the width) may be stored in the memory as characteristic information. Filter types used for equalizers include through (no equalizer), parametric equalizer (PEQ), 2nd order H-Shelf, 1st order H-Shelf, 2nd order L-Shelf, 1st order L-Shelf, HPF The example that became selectable from is given.

In the example of Table 86, there are four equalizers, “600 Hz, gain 3 db, setting Q 2”, “1000 Hz, gain −3 db, setting Q 5”, “2000 Hz, gain 4 db, setting Q 1”, “5000 Hz, It has characteristics such as “gain −2 db, setting Q 2”. The source device can make a finer setting by grasping the equalizer setting in the speaker device in detail.

Here, we explain the benefits of preparing various types of equalizers. There are various arrangements of the speaker units. For example, in a 2-channel speaker system composed of Lch and Rch speaker units, if there is a wall near the Lch speaker unit and there is a curtain near the Rch speaker unit, the signals are output from the Lch and Rch. The sound has a different sound quality due to the influence of reflection. Therefore, the test signal and information indicating ideal characteristics when the test signal is output from the speaker unit are retained, and the sound indicated by the test signal is output for each speaker unit in the actual installation environment. The pressure is measured by the microphone input unit 15, the signal characteristic of the measurement result is obtained by signal analysis, and a filter coefficient that can be corrected so as to approach the ideal characteristic is determined. The filter coefficients determined in this way for each of Lch and Rch are set in the equalizer of each receiver. Thereby, the speaker output of the same characteristic can be obtained from each channel.

As described above, the characteristic information includes not only information indicating the actual characteristics of the speaker unit and the amplifier unit but also information for specifying the speaker unit and the amplifier unit. In other words, if the speaker unit and the amplifier unit can be specified, their characteristic information can be acquired from a different route different from the route acquired directly from the receiver as in the processing procedure of FIG.

As an example of the another route, the source device 1 simply acquires only the model name as the characteristic information, and reads the relationship table between the model name and the characteristic information stored in advance in the memory 13 of the source device 1. Also good.

(Second Embodiment)
Another example of the another route will be described as a second embodiment of the present invention. In the present embodiment, the source device 1 simply acquires only the model name as characteristic information, accesses a server (server device) connected to the source device 1 on the network based on the model name, and characteristic information other than the corresponding model name The characteristic information on the speaker device side is acquired by reading out. However, in the example in which the receiver main body and the amplifier unit and the speaker unit are configured in separate housings as in the examples described in FIGS. 4 to 6, the user inputs the model name of the amplifier unit and the speaker unit. Thus, it is necessary to store in the memory on the receiver side or to provide the source device 1 with a configuration for inquiring the user only when it does not exist.

These examples will be described with reference to FIGS. 8 and 9 are sequence diagrams for explaining an example of a processing procedure in the voice radio transmission system according to the present embodiment, that is, another example of a processing procedure in the voice radio transmission system of FIGS. is there. Here, the receiver 3a of FIG. 4 will be described, but the same applies to the

receivers

3b, 6a, 6b, 7t, and 7w.

The processing procedure illustrated in FIG. 8 is for the case where the source device 1 acquires only the model names of the amplifier unit 4a and the speaker unit 5a from the receiver 3a by the same processing (steps S11 and S12) as steps S1 and S2 of FIG. (If necessary, the model name of the receiver 3a itself may be acquired). In this case, the source device 1 transmits the model name to the server 8 (step S13), and acquires characteristic information of the amplifier unit 4a and the speaker unit 5a corresponding to the model name from the server 8 (step S14).

As one form of the server 8, there is a form in which a specialized organization centrally manages the manufacturer name, model name, and characteristic information of each manufacturer's speaker. It is easy to obtain information from each manufacturer, update information, and acquire characteristic information by model name.
As another form of the server 8, there is a form linked to a data server of each manufacturer. When the source device 1 has data of only the manufacturer name and the model name, and the source device 1 makes an inquiry based on the model name, the data server of the corresponding manufacturer is inquired for characteristic information corresponding to the model name. If the format of the characteristic information is different for each manufacturer, the server 8 returns the characteristic information to the source device after matching the format.

Then, the source device 1 wirelessly transmits the acquired characteristic information to the receiver 3a, and instructs the receiver 3a to write all the characteristic information in the internal memory 33 (step S15). Thereafter, the source device 1 wirelessly transmits a parameter request for requesting parameter transmission to the receiver 3a in order to confirm all the parameters to the receiver 3a (step S16). In response to the parameter request, the receiver 3a wirelessly returns the parameter to the source device 1 (step S17). Then, the above processing is executed for each receiver.

In the processing procedure illustrated in FIG. 9, the source device 1 could not acquire even the model names of the amplifier unit 4a and the speaker unit 5a from the receiver 3a by the same processing (steps S21 and S22) as steps S1 and S2 in FIG. Is the procedure. In this case, the source device 1 sends an instruction to input the model names of the amplifier unit 4a and the speaker unit 5a to the terminal device 9 such as a smartphone used by the user (step S23). The connection destination to the terminal device 9 may be registered in the source device 1 in advance, or a UI (User Interface) image that prompts connection setting may be displayed and the user may set the connection.

In response to the instruction in step S23, the user operates the terminal device 9 to input a model name, and the terminal device 9 that receives the input transmits the model name to the source device 1 (step S24). Next, the source device 1 transmits the received model name to the server 8 (step S25), and acquires characteristic information of the amplifier unit 4a and the speaker unit 5a corresponding to the model name from the server 8 (step S26). Thereafter, the same processing as steps S15 to S17 in FIG. 8 is executed (steps S27 to S29). Then, the above processing is executed for each receiver.

(Third embodiment)
As a third embodiment of the present invention, referring to FIGS. 10A to 13, a transmission parameter (sent from the source device 1 corresponding to the specific example of the characteristic information in the first and second embodiments ( A specific example of parameters obtained and transmitted by the processing unit will be described.

FIG. 10A is a diagram illustrating an example of transmission parameters transmitted from the source device side to the speaker device side in the voice radio transmission system according to the present embodiment. 10B is a diagram showing an example of the filter type of the parameter of FIG. 10A, FIG. 10C is a diagram showing an example of the detailed parameter of the parameter Gain of FIG. 10B, and FIG. 10D is an example of the detailed parameter of the parameter EQ of FIG. FIG. 10E is a diagram illustrating an example of detailed parameters of the LPF / HPF parameter of FIG. 10B, FIG. 10F is a diagram illustrating an example of the detailed parameter of the parameter Polarity of FIG. 10B, and FIG. 10G is a diagram of FIG. It is a figure which shows an example of the detailed parameter of Parameter Delay.

As the transmission parameter, as shown in Table 91 of FIG. 10A, Filter Type indicating which function parameter is being transmitted is included. In addition, although the example which transmits a transmission parameter for every function is given here, it is not restricted to this. As shown in Table 92 of FIG. 10B, this Filter Type includes NOP (do nothing), Gain for setting the gain value, EQ1 for setting the characteristic of the first equalizer to 15th. EQ15 to set equalizer characteristics, LFP to set LPF characteristics, HPF to set HPF characteristics, Polarity to set output polarity, Delay to set delay Etc. should be included.

When Filter Type is Gain, any value of ± 127 dB is included in the transmission parameter as a detailed parameter as shown in Table 93 of FIG. 10C. When Filter Type is EQ, as shown in Table 94 of FIG. 10D, in addition to Mode indicating the mode (type) of the equalizer, Frequency for setting the frequency band and Gain for setting the gain. , Q for setting the Q value may be included. In this example, the modes include through (none), L-Shelf, H-Shelf, and PEQ.

Further, when Filter Type is LPF or HPF, as shown in Table 95 of FIG. 10E, in addition to Filter Type indicating the type of filter, Frequency for setting the frequency band may be included. Good. In this example, filter types include through (none), 1st to 4th, 6th, 8th order Butterworth, 2nd, 4th, 6th order Bessel.

In addition, when Filter Type is Polarity, information indicating normal or inversion may be included as shown in Table 96 of FIG. 10F. When Filter Type is Delay, as shown in Table 97 of FIG. 10G, Unit indicating whether the delay amount is described in ms, inch, or cm, Value indicating the delay amount, etc. Just include it. Actually, the delay amount can be defined by the distance shifted by time.

As described above, the source device 1 obtains characteristic information of various speaker units, and transmits appropriate transmission parameters to the signal processing unit of the receiver. And so on.

Next, specific examples of characteristic information and transmission parameters in the configuration example of FIG. A case will be described in which the source device 1 receives characteristic information that the reproduction frequency of the tweeters (speaker units 26t) of the

speaker devices

2a and 2b is 3 kHz to 22 kHz. In this case, the source device 1 outputs audio to the tweeter through an HPF having a cutoff frequency (the rated frequency [lower limit]) of 3 kHz in the signal processing unit 22 in order to avoid a failure due to a low frequency signal input. The transmission parameter is calculated and transmitted to the

speaker devices

2a and 2b.

10A, 10B, and 10E, in this case, 0x12 indicating HPF, a value indicating a filter type (any of 0x00 to 0x09), and Frequency is 3 kHz. A transmission parameter in which 0x0BB8 indicating that it exists is sequentially described is transmitted. The

speaker devices

2a and 2b that have received the transmission parameter set the cutoff frequency value (3 kHz in this example) in accordance with the lower limit of the reproduction frequency. When only one of the

speaker devices

2a and 2b is limited to the reproduction frequency, the transmission parameter may be transmitted only to the speaker device that is limited.

Next, other specific examples of characteristic information and transmission parameters in the configuration example of FIG. For example, as in the configuration example of FIG. 2, when a 5.1 channel system is constructed with six speaker devices, the L / R / Center arranged at the front and the LS / RS arranged at the back It is assumed that the specifications are different. When the efficiency of the LS / RS speaker is low, the efficiency of the L / R / Center speaker is 93 dB, and when the efficiency of the LS / RS speaker is 90 dB, the source device 1 obtains characteristic information from each speaker device. Recognize that there is a 3 dB difference in efficiency.

In this case, the source device 1 transmits, for example, a parameter that is increased by 6 dB as an electrical signal from the current setting to the signal processing unit 22 of the LS speaker device and the signal processing unit 22 of the RS speaker device. When described using the transmission parameters exemplified in FIGS. 7A to 7C and the like, the transmission parameters are 0x01 and 0x06. As a result, a system is constructed in which signals of the same sound pressure are output from all speakers.

The processing procedure in this example will be described with reference to FIG. FIG. 11 is a sequence diagram for explaining an example of a processing procedure in the voice radio transmission system according to the present embodiment, that is, another example of a processing procedure in the voice radio transmission system of FIG.

First, as in step S1 of FIG. 3, the source device 1 sends a parameter request to the LS or RS speaker device 2s (both corresponding to the speaker device 2a of FIG. 2 for example) to confirm all parameters. It transmits by radio (step S31). The speaker device 2s returns the parameter to the source device 1 in response to the parameter request (step S32). Such processing is also executed for the L, R, and C speaker devices 2f (both corresponding to, for example, the speaker device 2b of FIG. 2) (steps S33 and S34).

In the above example, characteristic information including information that the efficiency of the LS and RS speaker devices 2s is 90 dB is acquired in step S32, and the efficiency of the L, R, and C speaker devices 2f is 93 dB in step S34. Characteristic information including information is acquired. In this case, since the difference between the source device 1 and the source device 1 is 3 dB, the DSP gain (the gain of the amplifier unit corresponding to the

amplifier units

25t, 25m, and 25w in FIG. 2) is 6 dB with respect to the LS and RS speaker devices 2s. An instruction is transmitted by radio so as to increase (step S35). In the transmission parameters exemplified in FIGS. 10A to 10C and the like, 0x01 and 0x06 are obtained as described above. In FIG. 11, h is a symbol representing a hexadecimal number, and these parameters are expressed as 01h and 06h. In accordance with this instruction, the LS and RS speaker devices 2s set the DSP gain to be increased by 6 dB.

Finally, the source device 1 wirelessly transmits a DSP parameter request for requesting a parameter of the DSP (amplifier unit) to each speaker device 2s in order to confirm that the DSP gain is increased by 6 dB. (Step S36). In response to the DSP parameter request, each speaker device 2s returns the DSP parameter wirelessly to the source device 1 (step S37).

Further, the signal processing unit 12 of the source device 1 receives a predetermined audio signal (audio signal for calibration) stored in advance in the memory 13 or the like at the time of calibration (when the arrangement of the speaker unit is changed). Playback and output from each speaker unit of the speaker device. Then, the audio signal input from the microphone input unit 15 installed at the listening position is compared with the reproduced audio signal, and the characteristics of the environment in which each speaker device (actually each speaker unit) is installed (environment) Characteristic information).

Then, the signal processing unit 12 of the source device 1 calculates a parameter to be set in the signal processing unit 22 on the speaker device side based on the characteristic information of each speaker device and the calculated environmental characteristic information, and uses this as a transmission parameter for the speaker. Send to the device side. Of course, the signal processing unit 12 of the source device 1 may have a plurality of transmission parameters. In this case, an optimal transmission parameter may be extracted from the characteristic information (and environmental characteristic information) of the speaker device in the system and transmitted to the speaker device side. On the speaker device side, the signal processing unit 22 sets (updates) a parameter in the memory 23 using the transmission parameter.

Such processing can cope with, for example, a case where the user changes the speaker device. Specifically, first, it is possible to recognize that a different speaker device is connected by the source device 1 acquiring characteristic information of a new speaker device by a user instruction or automatically. Next, in the signal processing unit 12 of the source device 1, a new transmission parameter is determined based on the transmission parameter set in the memory 23 on the speaker device side in the system before change (before replacement) and the characteristic information of the new speaker device. Is calculated and transmitted to the speaker device side.

This makes it possible to enjoy the ideal sound quality (appropriate sound quality) as before the change even when the speaker device is changed. In this way, the characteristic information of a plurality of speaker devices can be grasped collectively on the source device 1 side, and the acoustic characteristics corresponding to the information can be selected. Therefore, even if the user replaces the speaker device, the user can always hear the sound in an ideal state. I can hear you.

Next, specific examples of characteristic information and transmission parameters in the configuration example of FIG. 4 (configuration example in which the amplifier unit and the speaker unit are separate from the signal processing unit) will be given. In such a case, it is necessary to store the characteristic information of the amplifier unit 4a and the speaker unit 5a, and the amplifier unit 4b and the speaker unit 5b in the memory 33 on the

receivers

3a and 3b side, respectively. For example, a terminal device such as a smartphone or a portable information terminal may be configured to be connectable to the

receivers

3a and 3b or the source device 1, and the user may manually register from the terminal device. This registration operation may be performed once for the amplifier unit and the speaker unit in separate enclosures. Thereafter, the characteristic information can be transmitted to the source device 1 in combination with another receiver (speaker device). Therefore, even when a new combination of speaker devices is performed, the source device 1 can automatically adjust the frequency, sound pressure, and the like.

Also in this example, when the source device 1 recognizes the

receivers

3 a and 3 b, the source device 1 obtains the characteristic information of the

receivers

3 a and 3 b and stores it in the internal memory 13. Here, for example, it is assumed that the rated output of the amplifier unit 4a does not match the output power of the speaker unit 5a. For example, if the specification of the amplifier unit 4a is 200 W at a rated output of 4Ω load and the specification of the speaker unit 5a is 100 W output at an impedance of 4Ω, the speaker unit 5a may be damaged if the output of the amplifier unit 4a is increased too much. is there.

Therefore, the source device 1 transmits a transmission parameter for reducing the gain of the amplifier unit 4a to 1/2 to the receiver 3a, and the signal processing unit 32 of the receiver 3a sets the parameter of the memory 33 using the transmission parameter. Do. 10A to 10C and the like, the transmission parameter is -6 dB in order to reduce the gain value so that the output is 100 W, and the transmission parameters are 0x01 and 0xFA. As a result, the volume of the amplifier unit 4a can be adjusted without worrying about breakage of the speaker.

The processing procedure in this example will be described with reference to FIG. FIG. 12 is a sequence diagram for explaining another example of the processing procedure in the voice radio transmission system according to the present embodiment, that is, another example of the processing procedure in the voice radio transmission system of FIG.

First, the source device 1 wirelessly transmits a parameter request to the receiver 3a in order to confirm all the parameters, similarly to step S11 of FIG. 8 (step S41). In response to the parameter request, the receiver 3a wirelessly returns the parameter to the source device 1 (step S42).

In the above-described example, characteristic information including information that the rated output of the amplifier unit 4a is 200 W and the speaker unit 5a is 100 W at the maximum is acquired from the receiver 3a in step S42. In that case, the source device 1 wirelessly transmits an instruction to halve the DSP gain of the amplifier unit 4a (that is, 6 dB down in voltage) in order to match the speaker unit 5a side (step S43). . In the transmission parameters exemplified in FIGS. 10A to 10C and the like, they are 0x01 and 0xFA as described above. In FIG. 12, as in FIG. 11, these parameters are expressed as 01h and FAh. In accordance with this instruction, the receiver 3a sets the DSP gain to 6 dB down.

Finally, in order to confirm that the DSP gain has been reduced by 6 dB, the source device 1 wirelessly transmits a DSP parameter request similar to step S36 to the receiver 3a (step S44). In response to the DSP parameter request, the receiver 3a wirelessly returns the DSP parameter to the source device 1 (step S45). Then, the processing as described above is executed for each receiver (receiver 3b in the example of FIG. 4).

Next, specific examples of characteristic information and transmission parameters in the configuration example of FIG. 6 (configuration example in which two

receivers

7t and 7w receive each channel) will be given. For example, when the upper limit of the frequency characteristic of the speaker unit 5w (woofer) (“rated frequency—upper limit” in Table 81) is 200 Hz, the LPF coefficient (Frequency in Table 95) is set to the receiver 7w with a cutoff frequency of 200 Hz. ) As well as an HPF coefficient (Frequency in Table 95) at which the cutoff frequency is 200 Hz is transmitted to the receiver 7t.

10A, 10B, and 10E, the transmission parameters for the receiver 7t are 0x12, 0x04, 0x00C8, and the parameters to be transmitted to the receiver 7w are 0x11, 0x04, and 0x00C8. Of course, the transmission parameter may be calculated so as to adopt a value indicating another filter type instead of 0x04 indicating the fourth-order Butterworth.

Thus, the transmission parameter is also transmitted to the receiver 7t according to the characteristic information of the speaker unit 5w on the receiver 7w side. The reason is that audio signals transmitted wirelessly are not separated for woofers and tweeters, and if the receiver 7t does not transmit and set the transmission parameters as described above, the woofer and tweeter have overlapping playback frequencies. It is because it will do. In this specific example, an appropriate crossover frequency can be set by using the transmission parameters as described above.

The processing procedure in this example will be described with reference to FIG. FIG. 13 is a sequence diagram for explaining another example of the processing procedure in the voice radio transmission system according to the present embodiment, that is, another example of the processing procedure in the voice radio transmission system of FIG.

First, as in step S11 of FIG. 8, the source device 1 wirelessly transmits a parameter request to the high-pitched receiver 7t to confirm all parameters (step S51). In response to the parameter request, the receiver 7t wirelessly returns the parameter to the source device 1 (step S52). Such a process is also executed for the low-frequency receiver 7w (steps S53 and S54).

In the above-described example, characteristic information including information that the lower limit frequency of the high-frequency speaker unit 5t is 150 Hz is acquired from the receiver 7t in step S52, and the upper limit of the low-frequency speaker unit 5w is acquired from the receiver 7w in step S54. Characteristic information including information that the frequency is 200 Hz is acquired.

In that case, the source device wirelessly transmits an instruction to the receiver 7t to set the cutoff frequency of the HPF of the loudspeaker speaker unit 5t to 200 Hz (step S55). The transmission parameters illustrated in FIGS. 10A, 10B, and 10E are 0x12, 0x04, and 0x00C8. In FIG. 13, similarly to FIG. 11, 12h, 04h, and c8h are indicated. Following this instruction, the receiver 7t sets the cutoff frequency of the HPF to 200 Hz. In addition, the source device 1 wirelessly transmits an instruction to the receiver 7w to set the LPF cutoff frequency of the low-frequency speaker unit 5w to 200 Hz (step S56). The transmission parameters illustrated in FIGS. 10A, 10B, and 10E are 0x11, 0x04, and 0x00C8. In FIG. 13, similarly to FIG. 11, 12h, 04h, and c8h are indicated. In accordance with this instruction, the receiver 7w sets the cutoff frequency of the LPF to 200 Hz.

Finally, in order to confirm that the cutoff frequency of the HPF is set to 200 Hz, the source device 1 wirelessly transmits a DSP parameter request similar to step S36 to the receiver 7t (step S57). . In response to the DSP parameter request, the receiver 7t returns a DSP parameter to the source device 1 (step S58). Similarly, the source device 1 wirelessly transmits a DSP parameter request to the receiver 7w in order to confirm that the LPF cutoff frequency is set to 200 Hz (step S59). In response to the DSP parameter request, the receiver 7w returns the DSP parameter to the source device 1 (step S60).

(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, an IC (Integrated Circuit) chip that can receive an audio signal wirelessly is mounted on each speaker, but a plurality of signal processing units may be provided in one speaker device.

Also, in each embodiment of the present invention, an example in which uncompressed audio signals for a plurality of channels are transmitted from a source device to a speaker device by wireless communication is given. However, in the system according to the present invention, the audio signal to be transmitted is not limited to non-compression, and the audio signal for the channel used for reproduction by the speaker device is transmitted by wireless communication from the source device to the speaker device. It can also be configured to.

In addition, the parts other than the speaker unit in the source device and the speaker device illustrated in FIGS. 1B, 2 and 4 to 6 are each a microprocessor (or DSP: Digital Signal Processor), a memory, a bus, an interface, a remote controller, etc. It can be realized by hardware such as peripheral devices and software executable on these hardware. A part of the hardware can be mounted as an integrated circuit / IC chip set. In that case, the software may be stored in the memory. In addition, all the components of the present invention may be configured by hardware, and in that case, a part of the hardware can also be mounted as an integrated circuit / IC chip set.

In addition, 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 a source device or a receiver, and the program code is executed by a microprocessor or a 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 nonvolatile 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 speaker device and a source device that transmits an audio signal to the speaker device by wireless communication. As an audio radio transmission method in an audio radio transmission system including

The audio wireless transmission method according to an embodiment of the present invention includes a signal processing step in which a signal processing unit of a speaker device performs predetermined signal processing on an audio signal received by wireless communication from a source device, and a speaker of the speaker device. The output step of outputting the sound indicated by the audio signal processed in the signal processing step, and the processing unit of the source device acquires characteristic information related to the sound output by the speaker device from the speaker device by wireless communication, A step of obtaining the predetermined signal processing parameter from the information, a transmission step of transmitting the parameter to the speaker device by wireless communication, and a signal processing unit of the speaker device received from the source device. Setting the parameters, and performing the predetermined signal processing according to the parameters. Other application examples are the same as those described for the audio wireless transmission system, and the description thereof is omitted.

Note that 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 obtains characteristic information relating to audio output from the speaker device by wireless communication from the speaker device to a computer on the source device side, obtains the predetermined signal processing parameters from the characteristic information, and A transmission step for transmitting the parameter to the speaker device by wireless communication. In addition, the above program includes a signal processing step for performing predetermined signal processing on an audio signal received by wireless communication from a source device to a computer on the speaker device side, and an audio signal processed by the signal processing step from the speaker unit. A receiving side program for executing the output step of outputting the sound indicated by the signal and the step of setting the parameter received from the source device and performing the predetermined signal processing according to the parameter; Other application examples are the same as those described for the audio wireless transmission system, and the description thereof is omitted.

An audio wireless transmission method according to another embodiment of the present invention includes a plurality of speaker devices, and a source device that transmits uncompressed audio signals for a plurality of channels to the plurality of speaker devices by wireless communication. A voice radio transmission method in a voice radio transmission system, wherein the speaker device sends the source device with the vendor name, model name, speaker position, speaker characteristics, amplifier characteristics, and equalizing processing as parameter information of the speaker equipment. At least one piece of information is transmitted.

As a specific example, this audio wireless transmission method is a signal processing in which a signal processing unit of a speaker device performs predetermined signal processing including equalizing processing on an audio signal of a predetermined channel received by wireless communication from a source device. An output step in which the speaker unit of the speaker device outputs the sound indicated by the audio signal processed in the signal processing step; and the processing unit of the source device has at least one piece of information (characteristics related to audio output by the speaker device). Information) from the speaker device, obtaining the parameter for the predetermined signal processing from the characteristic information, a transmission step in which the transmission unit of the source device transmits the parameter to the speaker device, and signal processing of the speaker device Set the parameter received from the source device, and set the predetermined parameter according to the parameter. Having the steps of performing signal processing. Other application examples are the same as those described for the audio wireless transmission system, and the description thereof is omitted.

In addition, the program code itself can be a program for causing the computer on the speaker device side to execute the audio wireless transmission method according to the present embodiment. That is, this program sends at least one information of vendor name, model name, speaker position, speaker characteristics, amplifier characteristics, and equalizing processing characteristics as parameter information of the speaker equipment from the speaker equipment to the source equipment. Send.

More specifically, this is a program for causing a computer on the source device side and a computer on the speaker device side to execute the audio wireless transmission method in the above specific example. That is, this program obtains at least one piece of information (characteristic information related to sound output by the speaker device) from the speaker device to a computer on the source device side, and performs predetermined signal processing including equalizing processing from the characteristic information. A transmission side program for executing a step of obtaining a parameter and a transmission step of transmitting the parameter to the speaker device is included. In addition, the program includes a signal processing step of performing predetermined signal processing including equalizing processing on an audio signal of a predetermined channel received by wireless communication from the source device to a computer on the speaker device side, and a signal from the speaker unit. A receiving-side program for executing an output step of outputting the sound indicated by the processed audio signal in the processing step, and a step of setting the parameter received from the source device and performing the predetermined signal processing according to the parameter including. Other application examples are the same as those described for the audio wireless transmission system, and the description thereof is omitted.

As described above, an audio wireless transmission system according to an embodiment of the present invention is an audio wireless transmission system including a speaker device and a source device that transmits an audio signal to the speaker device by wireless communication. The speaker device includes a signal processing unit that performs predetermined signal processing on an audio signal received by wireless communication from the source device, and a speaker unit that outputs the sound indicated by the audio signal processed by the signal processing unit. The source device has a processing unit that obtains characteristic information related to audio output from the speaker device by wireless communication from the speaker device, and obtains the predetermined signal processing parameter from the characteristic information. Then, the parameter is transmitted to the speaker device by wireless communication, and the signal processing unit sets the parameter received from the source device and follows the parameter. Is obtained by said applying said predetermined signal processing Te. As a result, when the audio signal is wirelessly transmitted and reproduced, the audio signal received by the reproduction-side speaker device can be corrected to the sound quality corresponding to the characteristics of each speaker device, and the sound can be output, thereby improving the sound quality. be able to.

In the speaker device, the signal processing unit and the speaker unit are preferably provided in a one-to-many relationship or in a one-to-one relationship. Thereby, it becomes possible to deal with arrangements of various relationships.

Moreover, it is preferable that the audio wireless transmission system is provided with the source device and the speaker device in a one-to-many relationship. Thereby, the effect of sound quality improvement is acquired more.

The speaker unit is preferably provided in the same housing as the signal processing unit. As a result, since it is set to output a matched sound so that each speaker unit or each amplifier unit does not fail when it is distributed as a product, it is possible to output a high-quality sound as a voice wireless transmission system.

The speaker unit may be provided in a housing different from the signal processing unit, and may be connected to the signal processing unit by wire. As a result, the speaker already owned by the user can be used simply by connecting it to the receiver.
In this configuration, it is preferable that the speaker device or the source device is configured such that the characteristic information about the speaker device can be input by a user operation. As a result, accurate characteristic information can be set by the user.

In addition, the speaker device includes an amplifier unit that amplifies a sound signal processed by the signal processing unit and outputs the amplified signal to the speaker unit, and the processing unit is related to sound output by the speaker unit and the amplifier unit. Characteristic information may be acquired from the speaker device by wireless communication, and the predetermined signal processing parameters for the speaker unit and the amplifier unit may be obtained from the characteristic information. Of course, when a plurality of sets of speaker units and amplifier units are provided, parameters for each speaker unit and parameters for each amplifier unit may be obtained. Thereby, not only the characteristics of the speaker unit but also the characteristics of the amplifier unit can be taken into account, and the parameters for the speaker device can be set, and the sound subjected to the signal processing based on the parameters can be output.

The source device has an input unit for inputting environmental characteristic information indicating characteristics of an installation environment of the speaker device, and the processing unit is configured to perform the predetermined signal processing from the characteristic information and the environmental characteristic information. The parameter may be obtained. Thereby, parameters of each speaker device can be set according to not only the performance of the speaker device but also the installation environment, and sound subjected to signal processing based on the parameter can be output.

In addition, the present invention can also take the form as the speaker device or the source device in the audio wireless transmission system as follows.
A speaker device according to an embodiment of the present invention is a speaker device that receives an audio signal transmitted by wireless communication from a source device, and performs predetermined signal processing on the audio signal received by wireless communication from the source device. And a speaker unit that outputs the sound indicated by the audio signal processed by the signal processing unit, and the characteristic information related to the audio output by the speaker device is wirelessly communicated to the source device. Transmitting and receiving the predetermined signal processing parameter obtained from the characteristic information in the source device by wireless communication from the source device, and the signal processing unit receives the parameter received from the source device. The predetermined signal processing is performed according to the parameters that are set. As a result, when an audio signal is wirelessly transmitted and reproduced, the audio signal received by the reproduction-side speaker device can be corrected to a sound quality corresponding to the characteristics of each speaker device, and the sound can be output, thereby improving the sound quality. be able to. Other application examples are the same as those described for the audio wireless transmission system, and the description thereof is omitted.

A source device according to an embodiment of the present invention is a source device that transmits an audio signal to a speaker device by wireless communication, and the speaker device receives an audio signal received from the source device by wireless communication, A signal processing unit that performs predetermined signal processing; and a speaker unit that outputs sound indicated by an audio signal processed by the signal processing unit, wherein the source device is characteristic information relating to audio output by the speaker device. Is obtained from the speaker device by wireless communication, and a processing unit for obtaining the predetermined signal processing parameter from the characteristic information is transmitted, and the parameter is transmitted to the speaker device by wireless communication. is there. As a result, when the audio signal is wirelessly transmitted and reproduced, the audio signal received by the reproduction-side speaker device can be corrected to the sound quality corresponding to the characteristics of each speaker device, and the sound can be output, thereby improving the sound quality. be able to. Other application examples are the same as those described for the audio wireless transmission system, and the description thereof is omitted.

An audio wireless transmission system according to another embodiment of the present invention includes a plurality of speaker devices, a source device that transmits uncompressed audio signals for a plurality of channels to the plurality of speaker devices by wireless communication, A voice wireless transmission system comprising: a speaker name, a speaker name, a speaker characteristic, an amplifier characteristic, and an equalizing processing characteristic as parameter information of the speaker device from the speaker device to the source device; , At least one piece of information is transmitted. The at least one piece of information refers to characteristic information related to sound output by the speaker device. This makes it possible to grasp the characteristics of the playback-side speaker device on the source device side, and corrects the audio signal received by the playback-side speaker device to a sound quality according to the characteristics of each speaker device before outputting the sound. It is also possible to configure so that such settings can be made from the source device side.

Further, the speaker device has a signal processing unit that performs predetermined signal processing including equalizing processing on an audio signal of a predetermined channel received by wireless communication from the source device, and the signal processing unit includes an amplifier unit and It is preferable that the speaker unit is provided in the same housing or another housing. Thereby, it can respond to various arrangements.

Moreover, it is preferable that the speaker device transmits the parameter information in response to a request from the source device. Thereby, each speaker apparatus does not need to transmit parameter information spontaneously.

Moreover, it is preferable that the source device transmits information for changing the equalizing processing characteristic to the speaker device according to the parameter information. As a result, it is possible to perform parameter setting (parameter update) on the speaker device side. As a result, the sound signal received by the reproduction-side speaker device is corrected to the sound quality according to the characteristics of each speaker device, and then the sound is Can be output, and sound quality can be improved.

Further, the present invention can also take the form as the speaker device or the source device in the audio wireless transmission system as follows. Application examples other than those described below are the same as those described for the voice radio transmission system, and a description thereof will be omitted.

A speaker device according to another embodiment of the present invention receives a plurality of channels of uncompressed audio signals transmitted by wireless communication from a source device, and performs predetermined signal processing including equalizing processing on audio signals of predetermined channels. A speaker device that outputs the sound indicated by the sound signal after the signal processing, and for the source device, the parameter information of the speaker device includes a vendor name, model name, speaker position, speaker characteristics, amplifier Among the characteristics and the equalizing processing characteristics, at least one piece of information is transmitted. This makes it possible to grasp the characteristics of the playback-side speaker device on the source device side, and corrects the audio signal received by the playback-side speaker device to a sound quality according to the characteristics of each speaker device before outputting the sound. It is also possible to configure so that such settings can be made from the source device side.

A source device according to another embodiment of the present invention is a source device that transmits an uncompressed audio signal for a plurality of channels to a plurality of speaker devices by wireless communication, from the speaker device to the speaker device. As parameter information, at least one piece of information is received from a vendor name, model name, speaker position, speaker characteristics, amplifier characteristics, and equalizing processing characteristics. This makes it possible to grasp the characteristics of the playback-side speaker device on the source device side, and corrects the audio signal received by the playback-side speaker device to a sound quality according to the characteristics of each speaker device before outputting the sound. It is also possible to configure so that such settings can be made from the source device side.

DESCRIPTION OF SYMBOLS 1 ... Source device, 2a, 2b ... Speaker device, 3a, 3b ... Receiver, 4a, 4b, 25t, 25m, 25w ... Amplifier part, 5a, 5b, 26, 26t, 26m, 26w ... Speaker part, 10 ... Source Main control unit of device, 11 ... HDMI processing unit, 12 ... Signal processing unit of source device, 13 ... Memory of source device, 14 ... Wireless communication unit of source device, 15 ... Microphone input unit, 20 ... Main control unit, 21 ... wireless communication unit, 22 ... signal processing unit, 23 ... memory, 24t, 24m, 24w ... DAC.

Claims

An audio wireless transmission system comprising: a speaker device; and a source device that transmits an audio signal to the speaker device by wireless communication,
The speaker device includes: a signal processing unit that performs predetermined signal processing on an audio signal received by wireless communication from the source device; and a speaker unit that outputs audio indicated by the audio signal processed by the signal processing unit; Have
The source device has a processing unit that obtains characteristic information related to audio output from the speaker device by wireless communication from the speaker device, and obtains the predetermined signal processing parameter from the characteristic information, Send to speaker device by wireless communication,
The voice radio transmission system, wherein the signal processing unit sets the parameter received from the source device, and performs the predetermined signal processing according to the parameter.
2. The voice radio according to claim 1, wherein the signal processing unit and the speaker unit are provided in a one-to-many relationship or in a one-to-one relationship in the speaker device. Transmission system.
The voice radio transmission system according to claim 1 or 2, wherein the voice radio transmission system is provided with a one-to-many relationship between the source device and the speaker device.
4. The voice radio transmission system according to claim 1, wherein the speaker unit is provided in the same housing as the signal processing unit.
The audio wireless transmission system according to any one of claims 1 to 3, wherein the speaker unit is provided in a housing different from the signal processing unit, and is connected to the signal processing unit by wire. .
A speaker device that receives an audio signal transmitted by wireless communication from a source device,
A signal processing unit that performs predetermined signal processing on the audio signal received by wireless communication from the source device, and a speaker unit that outputs the sound indicated by the audio signal processed by the signal processing unit, Characteristic information related to sound output by the speaker device is transmitted to the source device by wireless communication, and the predetermined signal processing parameter obtained from the characteristic information by the source device is transmitted from the source device by wireless communication. Receive
The speaker device, wherein the signal processing unit sets the parameter received from the source device and performs the predetermined signal processing according to the parameter.
A source device that transmits an audio signal to a speaker device by wireless communication,
The speaker device includes: a signal processing unit that performs predetermined signal processing on an audio signal received by wireless communication from the source device; and a speaker unit that outputs audio indicated by the audio signal processed by the signal processing unit; Have
The source device has a processing unit that obtains characteristic information related to audio output from the speaker device by wireless communication from the speaker device, and obtains the predetermined signal processing parameter from the characteristic information, A source device that transmits to a speaker device by wireless communication.