Method for controlling a wireless audio transmission system

Abstract

The invention relates to a method for controlling a wireless audio transmission system (10) which has: a plurality of wireless transmitters (110, 120, 130, 140), each of which is suitable for transmitting audio signals on the basis of a radio resource; a wireless receiver (200) for receiving the audio signals transmitted by the wireless transmitters (110-140); and a control unit (300) having a user interface (310). A group of at least two wireless transmitters (111-114) is selected from the plurality of wireless transmitters (110-140) by means of the user interface (310). The selected at least two wireless transmitters (111-114) are assigned to a function or a user. The group of wireless transmitters (111-114) is assigned a radio resource which allows one of the wireless transmitters (111-114) to wirelessly transmit an audio signal to the wireless receiver (200). At any one time, only one of the groups of wireless transmitters (111-114) can wirelessly transmit an audio signal via the radio resource.

Description

[0001] Method for controlling a wireless audio transmission system

[0002] The present invention relates to a method for controlling a wireless audio transmission system and a wireless audio transmission system.

[0003] Such a wireless audio transmission system can be a wireless microphone and / or in-ear monitoring system. Several wireless microphones and wireless in-ear monitoring units can be provided in a wireless audio transmission system. The wireless microphones serve as wireless transmitters. At least one wireless receiver can be provided in the system, which receives the audio signals transmitted by the wireless microphone systems. The transmitted audio signals can be mixed in a mixer and then transmitted to a wireless in-ear monitoring unit. During a wireless audio transmission, such as at a show or live performance, artists may use several different wireless microphones. These different wireless microphones or wireless in-ear monitoring units must be managed by the sound engineers.The management of these various wireless microphones in a wireless audio transmission system must be efficient and secure.

[0004] In the priority-substantiating German patent application, the German Patent and Trademark Office searched the following documents: EP 0 853 860 B1 and EP 1 774 818 B1.

[0005] It is therefore an object of the present invention to provide a method for controlling a wireless audio transmission system and a wireless audio transmission system.

[0006] This object is achieved by a method for controlling a wireless audio transmission system according to claim 1 and by a wireless audio transmission system according to claim 5.

[0007] Thus, a method for controlling a wireless audio transmission system is provided. The audio transmission system has a plurality of wireless transmitters, each suitable for transmitting audio signals based on a radio resource. The audio transmission system further has a wireless receiver suitable for receiving the audio signals transmitted by the wireless transmitters. Furthermore, a control unit with a user interface is provided in the audio transmission system. By means of the user interface, a group of at least two wireless transmitters is selected from the plurality of wireless transmitters. The first wireless transmitters can be assigned to a function (for example, guitar microphones) or a user.The radio resources are assigned to the group of wireless transmitters, allowing one of the wireless transmitters to wirelessly transmit an audio signal to the wireless receiver. Only one of the wireless transmitters in the group transmits an audio signal via the first radio resource at a time.

[0008] This allows a radio resource in a wireless audio transmission system to be assigned to multiple wireless transmitters, but only one of the wireless transmitters uses the radio resource at a time to wirelessly transmit an audio signal. This allows for quick switching between wireless transmitters. If a user uses multiple wireless microphones in succession, switching between wireless microphones can be done safely and quickly.

[0009] According to one aspect of the present invention, when one of the first wireless transmitters is activated, the other first wireless transmitters can be deactivated, so that only one of the wireless transmitters is activated at a time and can transmit audio signals using the first radio resource. This makes it easy to ensure that the radio resource is always used by only one of the first wireless transmitters. This is advantageous because the radio resource is then not oversubscribed, since the first wireless transmitters only use the radio resource sequentially and not in parallel.

[0010] According to one aspect of the present invention, the wireless transmitters each have an activation actuator. Upon actuation of the activation actuator, the wireless transmitter is activated and the remaining wireless transmitters are deactivated. This ensures that only one of the wireless transmitters is active at any one time and can use the radio resource.

[0011] The invention also relates to a wireless audio transmission system with a plurality of wireless transmitters, each of which is suitable for transmitting audio signals based on a radio resource. The audio transmission system further comprises a wireless receiver for receiving the audio signals transmitted by the wireless transmitters, as well as a control unit with a user interface. The control unit is configured to select a group of at least two first wireless transmitters from the plurality of wireless transmitters based on the inputs via the user interface, wherein the wireless transmitters are assigned to a function or a user. The control unit is further configured to assign a radio resource to the group of first wireless transmitters, which allows one of the first wireless transmitters to wirelessly transmit an audio signal to the wireless receiver.Only one of the wireless transmitters can transmit an audio signal wirelessly via the first radio resource at a time.

[0012] The method according to the invention enables a more efficient use of the radio resources (RF spectrum) and an optimization of the handling process between the sound engineer and the user of the microphone (for example a musician on stage).

[0013] According to the invention, multiple wireless transmitters (e.g., microphones) can be used to share a radio resource, but only one of these wireless transmitters is active at a time. If one of the microphones is activated, the other microphones in the group are deactivated. Optionally, the exchange mechanism can be confirmed on the new device. This is advantageous because it prevents the microphone user from forgetting to turn off their previous bodypack (or beltpack) in the hustle and bustle, as this is automatically deactivated.

[0014] This significantly improves the safety and reliability of a wireless transmitter (e.g., a wireless microphone) during the handover process between the sound engineer and the performer. A group of microphones (which, for example, are used one after the other by the performer) is used serially, rather than in parallel. This allows the radio resource to be secured for a group of microphones, as the various microphones are operated one after the other or sequentially, rather than in parallel. This is advantageous because it allows for optimized use of the RF frequency spectrum.

[0015] In a wireless audio transmission system, various wireless transmitters (e.g., wireless microphones or wireless transmitters) can be provided for instruments such as guitars, which, however, can be used sequentially rather than in parallel. These respective wireless transmitters can be assigned to a group of devices or a virtual device. When an exchange mode is activated, the various wireless transmitters can be grouped together. Each transmitter in this group can transmit an audio signal from the wireless transmitter to a receiver. However, the wireless transmitters in this group do not transmit in parallel; only one wireless transmitter in this group can transmit. When a wireless transmitter is activated, all other wireless transmitters in this group are deactivated.This ensures that at any given time only one wireless transmitter can use the radio resource, such as a time slot in a transmission frame.

[0016] The wireless transmission system can have a control unit for controlling the system. The control unit can, for example, be controlled via a user interface. In particular, different operating modes such as handover mode can be activated via the user interface. Here, the user can, for example, group together various wireless transmitters (for example wireless microphones). This group can be viewed as a virtual transmitter. The special feature of the virtual transmitter is that various wireless transmitters are present, but they do not transmit at the same time. Only one of the group of wireless transmitters (the virtual wireless transmitter) can transmit at any given time. While one of the wireless transmitters is transmitting, the other wireless transmitters in the group are deactivated. This ensures that only one of the wireless transmitters can transmit at any given time.

[0017] Preferably, each wireless transmitter (e.g., each microphone) in the group has been paired with a base station. This allows the wireless transmitter to transmit immediately when activated.

[0018] This control of the wireless transmitters in a group occurs when a group of wireless transmitters is selected and when an operating mode is activated, for example, via a user interface. Selecting the wireless transmitters and adding them to a group can optionally be done via the user interface.

[0019] The user interface can provide a control element for each wireless transmitter in the selected group. By pressing one of these elements, the corresponding wireless transmitter can be selected from the group. This allows for quick and easy switching of the wireless transmitter. The user interface optionally features a display, and the control elements can be shown on the display. The control elements can be selected using a computer mouse, a touchpad, or a touch-sensitive display, for example.

[0020] A wireless transmitter can be a wireless microphone, a wireless instrument amplifier, etc.

[0021] Further embodiments of the invention are the subject of the subclaims.

[0022] Advantages and embodiments of the invention are explained in more detail below with reference to the drawing.

[0023] Fig. 1 shows a schematic representation of a wireless audio transmission system.

[0024] Fig. 1 shows a schematic representation of a wireless audio transmission system. The wireless audio transmission system 10 has a plurality of wireless transmitters 110, 111 to 114, 120, 130, 140 as well as a wireless receiver 200, a control unit 300 with a user interface 310, and optionally a mixer 400. The wireless transmitters 110, 120, 130, 140 can transmit an audio signal wirelessly to the receiver 200, each based on a radio resource. In the first operating mode, the wireless transmitters 111 - 114, 110 - 140 can be coupled to the wireless receiver 200 in order to be able to transmit an audio signal. By means of the control unit 300 and the user interface 310, various wireless transmitters, for example 111 - 114, can be combined in a second operating mode to form a group 110 of wireless transmitters.

[0025] This can occur, for example, when the wireless transmitters are assigned to a user or a function and it can be assumed that the wireless transmitters 111 - 114 are not operated simultaneously, but serially or sequentially. In such a case, a first radio resource can be assigned to the group of first wireless transmitters 111 - 114. The group of first wireless transmitters 111 - 114 can then be controlled by means of the control unit 300 such that only one of the first wireless transmitters 111 - 114 uses the radio resource to wirelessly transmit an audio signal to the receiver 200. The other (i.e., the second) wireless transmitters 120, 130, 140 are not combined into a group because they are not assigned to a user or a function. The first wireless transmitters each have an activation element 111a - 114a.Pressing this button activates the respective wireless transmitter and deactivates all other wireless transmitters in the group of the first wireless transmitters. This ensures that the wireless transmitter for which the activation button has been pressed is always activated.

[0026] Optionally, all first wireless transmitters 11 1 - 1 14 of the group of first wireless transmitters can be paired with the receiving unit 200, ie linked, so that when one of the wireless transmitters is activated, linking is no longer required.

[0027] On the user interface 310, a control element 111b - 114b can be provided for each wireless transmitter 111 - 114 of the selected group. By operating one of these elements 111b - 114b, the respective assigned wireless transmitter from the group can be selected. This allows for a quick and easy change of the wireless transmitter. If a user uses several wireless microphones in succession, the wireless microphones can be changed safely and quickly.

[0028] The wireless audio transmission system can be designed as a wireless multi-channel audio system (WMAS), in particular according to ETSI EN 300422. Several mobile devices can be used as wireless transmitters, such as several microphones or several in-ear monitoring units, simultaneously with a base station as a wireless receiver (and optionally with a control unit).

[0029] If multiple audio transmitters (e.g. a handheld microphone or other microphones) transmit audio signals to a base station simultaneously, and the base station transmits a second audio signal composed of these audio signals to an in-ear monitoring unit or a bodypack or beltpack, the microphones (wireless transmitters) do not transmit simultaneously. Instead, subscriber access is achieved using a Time Division Multiple Access TDMA system with a repeating frame with a number of time slots per RF channel. For example, 128 time slots per frame can be provided for the transmission of audio streams. Additional time slots can be provided for control data. This allows up to 128 mobile devices to communicate with the base station. The TDMA method ensures multiple access through the temporal sequence of multiple subscribers to a wireless audio transmission.The minimum latency of the audio data is determined by the largest distance between two consecutive time slots.

[0030] A wireless multi-channel audio system (WMAS) (based on ETSI EN 300422) may comprise a base station and a plurality of mobile devices, e.g., at least one handheld microphone (mobile transmitter), optionally at least one multi-channel microphone (mobile transmitter), optionally a first bodypack or beltpack (mobile receiver) with an output for in-ear monitoring, optionally a combined second bodypack or beltpack (mobile receiver) with an input for microphone signals and an output for in-ear monitoring. Thus, the number of mobile transmitters or mobile receivers in the wireless multi-channel audio system can vary.

[0031] In the wireless multi-channel audio system, the base station is connected to an antenna via a cable, providing an RF channel. Optionally, additional antennas can be connected to the base station, providing additional RF channels. The antenna can have an RF transmitter ("radiohead"), so that digital signals are transmitted via the cable, which are converted into analog RF signals in the radiohead.

[0032] A control unit connected to the base station can provide a user interface 310, via which an operator can enter configuration and control commands for the base station. Optionally, the base station can be coupled to a mixer. Using the mixer, the audio signals from the respective wireless audio devices (e.g., microphones) can be mixed into an overall audio signal.

[0033] The wireless multi-channel audio system can, for example, have a number of microphones, namely a handheld microphone, a multi-channel or stereo microphone, and mobile receiving devices. The mobile receiving devices can have an output for so-called in-ear monitoring, which allows a wearer to receive an audio channel or audio stream. The mobile receiving device can additionally be equipped with a microphone input for a clip-on microphone or lavalier microphone. The user of the mobile receiving device is thus able to simultaneously receive one audio channel or audio stream and transmit another audio channel or audio stream. The microphones and mobile receiving devices are collectively referred to below as mobile devices. The microphone can send first audio data in the form of an audio stream to the base station. The second microphone can send second audio data in the form of an audio stream to the base station.The mobile device (bodypack or beltpack) can send third-party audio data in the form of an audio stream to the base station (via the antenna). The mobile devices can receive audio data in the form of an audio stream from the base station.

[0034] The base unit can transmit control data to the respective mobile devices, e.g., transmitters / receivers, via the antenna. The control data can be used by the mobile devices to adjust wireless transmission parameters. Using the control data, the base station can specify transmission parameters to the mobile devices, such as a transmission frequency, a time slot in the transmission frame, transmission power, etc. The base station can thus control the transmission from the mobile devices to the base station and from the base station to the mobile devices.

[0035] The control data may include control and / or status information exchanged between the mobile devices and the base station. In addition to the control information or control data, other data may be exchanged as part of the control data.

[0036] For example, in a case with 128 TDMA time slots per frame, one time slot can be reserved after every 16 time slots. This time slot can be used for control data such as

[0037] Synchronization information and control and status signals are used.

[0038] Optionally, a frame can have 128 TDMA time slots for audio transmission and 8 time slots for control signals, so that a frame has, for example, 136 time slots.

[0039] Alternatively, the control data can also be transmitted in those time slots that are not reserved and therefore free. In this case, no separate time slots are reserved for the transmission of the control data; instead, the control data is transmitted as and when possible.

[0040] Communication from the base station to the mobile devices can be multicast, and communication from the mobile devices to the base station can be unicast. The control console can be connected to the base station and can have a user interface (UI) through which the user can enter configuration and / or control commands for the base station.

[0041] The (handheld) microphone can transmit audio data as the first audio data in the form of an audio stream wirelessly as a unidirectional radio transmission to the base station. This transmission can be carried out in a unicast. The audio can be transmitted as mono microphone data.

[0042] The audio data from the respective audio data transmitters (microphones) can be transmitted using a TDMA method. The TDMA method ensures multiple access to a wireless audio transmission through the temporal sequencing of multiple participants. For low-latency transmission, for example, a deterministic and equidistant grid of time slots per audio stream can be used. The minimum latency of a stream is determined by the largest distance between two consecutive time slots assigned to it.

[0043] The wireless multi-channel audio system can have a channel bandwidth of 6 MHz, 8 MHz, or 10 MHz. Audio transmission can occur in the frequency ranges 470 - 698 MHz (UHF) or 1350 - 1525 MHz (1 G4).

[0044] Subscribers access the transmission channels using Time Division Multiple Access (TDMA). Optionally, the number of subscribers can be up to, for example, 128 independent audio streams per broadband channel. The modulation method can be Orthogonal Frequency Division Multiplexing (OFDM) in combination with various subcarrier modulation or coding methods. The audio coding can be done using different methods and sampling rates, as well as in mixed mode. For example, the sampling rates can be 48 kHz or 96 kHz. The audio coding can be done using the OPUS method, the ADPCM method, the PCM method, or other suitable coding methods (e.g., LC3, SBC). Synchronization of the TDMA raster and the carrier offset estimation (CFO estimation) can be ensured using synchronization patterns. A basic TDMA frame can be divided into 1 / 2, 1 / 4, 1 / 8, or 1 / 16 access intervals.

[0045] The audio transmission can be encrypted. The base station can provide a synchronization signal, manage connected or paired devices, and allocate the appropriate communication resources. The base station can generate audio signals from the received audio signals from the wireless transmitters, which can represent a mix of the wireless transmitters' audio signals. These audio signals can then represent an in-ear monitoring audio signal.

[0046] The mobile devices can register with the base station to enable communication with the base station 400. The mobile devices can optionally initiate the transmission of audio data if they have previously detected a base station with which they should communicate.

[0047] It may be necessary for the mobile devices to be "paired" with the base station. Pairing can take place in several steps. First, the operator decides at which frequency the base station will make the RF channel available. Optionally, the base station can be set up to identify other transmitters in the permitted frequency band so that the operator can select the frequency for the RF channel so that interference from other transmitters is avoided if possible. The base station transmits a control timeslot on the RF channel within a frame. The control timeslot contains a unique ID for the base station. After the pairing process has been initiated on the respective mobile device, for example by pressing a button, the mobile device searches for an RF signal, finds the RF channel of the base station and reads the control timeslot.In another control time slot, the mobile device then sends its unique ID to the base station and is displayed there as a device ready for pairing. The base station operator confirms the mobile device has been found, and the base station saves the mobile device's unique ID. The mobile device receives a confirmation from the base station in the next control time slot and, in turn, saves the base station's unique ID.

[0048] Optionally, the base station operator can complete the pairing process by verifying the mobile device's PIN code. Only after pairing are the mobile devices ready to transmit a signal. Typically, a sound engineer pairs the mobile devices with the base station before a production, preventing unpaired devices from eavesdropping at a later time. Furthermore, the base station cannot process signals from unpaired devices.

[0049] According to one aspect, the mobile devices can also optionally communicate with each other and exchange data. The audio transmission method can be used for any TDMA audio transmission; in particular, audio signals from at least two audio channels can be transmitted from a base station to a receiver. An example of such a wireless multi-channel audio system is in-ear monitor systems, where the base station or a mixer mixes an audio signal based on multiple audio channels and then transmits this signal wirelessly to in-ear monitoring units.

[0050] The base station must therefore have audio data with multiple (at least two) audio channels. These audio channels can come from an external source or from wireless microphones in the multi-channel audio system.

[0051] Bodypacks can output a stereo signal at the audio output.

[0052] Each receiver of the audio samples can check whether the audio samples contained in the frame are intended for it or not. The base station can transmit information about which time slots are intended for a mobile device to the mobile devices in advance. This can be particularly important in a multi-channel audio system, for example, when more than two audio channels are transmitted.

[0053] For each TDMA resource (i.e., for each stream, frame, or time slot) in the audio transmission system, the RF modulation used for wireless transmission can be specified. Examples of RF modulation are Q-PSK or QAM 64. While Q-PSK modulation allows for greater robustness against interference and greater directivity, QAM 64 modulation enables higher data rates. The total available data rate for a stream is then determined by the RF modulation used and the number of time slots provided in a frame. In other words, the transmission parameters can be configured for each audio stream.

[0054] The audio data transmitted in a stream can be transmitted uncompressed or compressed. The required data rate for uncompressed transmission is determined by the sample rate (e.g., 48 kHz, 96 kHz). Audio codecs can be used to reduce the data rate. An audio codec can be configured using parameters to increase audio quality at the expense of data rate, or conversely, to increase the data rate at the expense of audio quality. When using audio codecs, it is important to note that they have a latency for processing. The specific TDMA resource used also affects the power consumption of the mobile devices and the base station. The more TDMA resources required for a stream (sending / receiving), the higher the power consumption. Using an audio codec can also lead to an increase in power consumption.

[0055] For example, with an efficient OPUS codec, good audio quality can be achieved at a data rate of approximately 80 kbit / s. In wireless transmission, this data rate can be achieved if 8 of, say, 128 TDMA slots are used with a low modulation (e.g., BPSK). This would also be advantageous in terms of robust modulation at a long range. Alternatively, this data rate of 90 kbit / s can be achieved if one of 128 timeslots in a frame is used with a high modulation (e.g., QAM 64). Such a stream would have high modulation at a short range and higher latency. However, the advantage is that the lower resource requirements for this stream can lead to the unused TDMA resources being used for another channel.

[0056] To meet data protection requirements, communication between the mobile devices and the base station can be encrypted with a symmetric key. The key exchange between the base station and the mobile devices takes place using a public / private key method.

[0057] A typical avoidance case occurs when different microphones or wireless transmitters 111, 112, 113, 114 are never used simultaneously during a show. This regularly occurs when all of the microphones in question are assigned to a specific artist who switches between these microphones during the show. According to the invention, these microphones are defined before the show as forming a group 1 10. When allocating radio resources in the wireless audio transmission system 10, it is then sufficient to allocate to this group a radio resource that is only sufficient for the wireless transmission of audio signals for one member of the group. If the artist switches from a first microphone in the group to a second microphone in the group, a user input is made to activate the second microphone.The user input can be made, in particular, by actuating an activation element 111a-114a on the second microphone or from the user interface 310 on the control unit 300. Optionally, the user input on the control unit can also be made by executing a previously entered program. According to the invention, this single user input initiates an associated process. A key factor here is that the control unit 300 can wirelessly send control data to the mobile devices and thereby control the mobile devices. The process includes the following steps:

[0058] If the user input has been made to the second microphone, the second microphone transmits the information that it should be activated wirelessly via the receiver 200 to the control unit 300.

[0059] The control unit 300 determines that the second microphone belongs to the defined group 110.

[0060] The control unit 300 checks whether a first microphone of group 110 is already activated and thus transmitting wireless audio signals on the radio resource assigned to group 110. If this is the case, the control unit sends a control signal to the first microphone, according to which the wireless transmission of audio signals from the first microphone is deactivated.

[0061] The control unit then sends a control signal to the second microphone, which activates the wireless transmission of audio signals from the second microphone. Overall, a single user input to activate a specific microphone in the group automatically deactivates a microphone in the group that was previously transmitting on the radio resource, without any further intervention, and the selected microphone takes over the radio resource to transmit its own audio signal.

[0062] List of reference symbols

[0063] 10 Wireless audio transmission system

[0064] 110 group of wireless transmitters

[0065] 111 Wireless transmitter 111a Activation element

[0066] 112 wireless transmitters

[0067] 112a Activation element

[0068] 113 wireless transmitters

[0069] 113a Activation element 114 Wireless transmitter

[0070] 114a Activation element

[0071] 120 wireless transmitters

[0072] 130 wireless transmitters

[0073] 140 wireless transmitters 200 wireless receivers

[0074] 300 control unit

[0075] 310 User Interface

[0076] 400 mixing console

Claims

Claims 1. A method for controlling a wireless audio transmission system (10) comprising a plurality of wireless transmitters (111, 112, 113, 114, 120, 130, 140), each of which is suitable for transmitting audio signals based on a radio resource, and a wireless receiver (200) for receiving the audio signals transmitted by the wireless transmitters (110 - 140), and a control unit (300) having a user interface (310), comprising the steps: Selecting a group (110) of at least two wireless transmitters (111 - 114) from the plurality of wireless transmitters (111 - 140) by means of the user interface (310), wherein the selected at least two wireless transmitters (111 - 114) are assigned to a function or a user, Assigning a first radio resource to the group (110) of wireless transmitters (111 - 114), which allows one of the wireless transmitters (111 - 114) to be active and to transmit an audio signal wirelessly to the wireless receiver (200), wherein at any one time only one of the wireless transmitters from the group (110) of wireless transmitters (111 - 114) wirelessly transmits an audio signal via the first radio resource, wherein upon activation of a wireless transmitter (111 - 114) from the group (110), the other wireless transmitters (111 - 114) of the group (110) are automatically deactivated, so that at any one time only one of the wireless transmitters (111 - 114) of the group (110) is activated and transmits audio signals by means of the first radio resource.

2. The method according to claim 1, wherein the control unit (300) is designed to transmit control data to the wireless transmitters (111 - 114) and wherein, upon activation of one wireless transmitter (111 - 114) from the group (110), the deactivation of another wireless transmitter (111 - 114) from the group (110) is carried out by control data sent by the control unit (300).

3. Method according to one of claims 1 to 2, wherein the wireless transmitters (111 - 140) each have an activation actuating element (111 a - 114a), wherein upon actuation of the activation actuating element (111 a - 114a) the wireless transmitter (111 - 140) is activated and the remaining wireless transmitters are deactivated.

4. The method according to any one of claims 1 to 3, wherein the user interface (310) comprises an operating element (111b - 114b) for each wireless transmitter (111 - 114) of the group of wireless transmitters, whereby the corresponding wireless transmitter (111 - 114) is selected by actuating the respective control element (111b - 114b).

5. Wireless audio transmission system (10), comprising a plurality of wireless transmitters (111, 112, 113, 114-140) each suitable for transmitting audio signals based on a radio resource, a wireless receiver (200) suitable for receiving the audio signals transmitted by the wireless transmitters (111, 112, 113, 114-140), and a control unit (300) with a user interface (310) suitable for controlling the plurality of wireless transmitters (111, 112, 113, 114-140), wherein the control unit (300) is designed to control a group (110) of at least two wireless transmitters (111-114) from the plurality of wireless transmitters (111, 112, 113, 114 - 140) by means of the user interface (310), wherein the wireless transmitters (111 - 114) in the group (110) are assigned to a function or a user, wherein the control unit (300) is designed to assign a first radio resource to the group (110) of wireless transmitters (111 - 114),which allows one of the wireless transmitters (111-114) to be active and to transmit an audio signal wirelessly to the wireless receiver (200), wherein the control unit (300) is configured such that only one of the wireless transmitters (111-114) from the group (110) can transmit an audio signal via the first radio resource, wherein upon activation of one wireless transmitter (111-114) from the group (110), the other wireless transmitters (111-114) of the group (110) are automatically deactivated, so that only one of the wireless transmitters (111-114) of the group (110) is activated and transmits audio signals via the first radio resource.

6. Wireless audio transmission system (10) according to claim 5, wherein the control unit (300) is designed to transmit control data to the wireless transmitters (111-114) and wherein upon activation of one wireless transmitter (111-114) from the group (110), the deactivation of another wireless transmitter (111-114) from the group (110) is carried out by control data sent by the control unit (300).

Images