In the drawings:
The mobile terminal ME is connected to an external wireless receiver DE by a standard interface SST.
The external wireless receiver DE preferably has a plurality of antennae to enable reception diversity. The wireless receiver DE accordingly has at least two receivers E1 and E2 which are connected to an evaluating and controlling unit ASU. The wireless receiver DE also has a switching unit SE to select the receiver that delivers the best signal based on the evaluation of the first and second receivers E1, E2.
So-called “smart antennae” which are designed as an array of four or more antennae can be used alternatively or in addition. The signals of the individual antennae are combined by adjustable phase shifters.
The wireless receiver according to the first and second embodiment examples can be used, for example, in the VHF and UHF frequency ranges or in the ISM frequency range. Alternatively, the reception of the wireless receiver can also be based on a Bluetooth protocol, a WLAN protocol, or a high-frequency protocol.
The standard interface SST can be implemented, for example, as a USB interface. The external wireless receiver can be supplied with the appropriate operating voltage via the standard interface SST. Alternatively, the interface SST can also be implemented as a wireless interface based on the Bluetooth protocol or WLAN protocol.
The mobile terminal ME can be implemented, for example, as a laptop or notebook, a PDA, a Smart Phone, a mobile telephone, or the like. The mobile terminal can realize determined functions which are needed for further processing of or for the reception of the wirelessly transmitted audio signals. Examples of such functions include decompression in a compander system, de-emphasis, influencing of frequency response, a mute function, and a diversity function on the digital plane. Further, the mobile terminal can control loudness and can carry out audio processing of the received audio signal. This can be, for example, a mixing of a plurality of signal sources or a level adjustment of individual signal sources so that, for example, a mixing console function can be realized.
The digital audio processing can preferably have all of the digital algorithms for audio processing. The digital audio signal processing can also have a function which prevents or reduces feedback in the event such feedback occurs.
Further, the wireless receiver can also be designed to scan the available frequency range to find free frequencies for a wireless audio transmission. As soon as the wireless receiver has found a corresponding free frequency, the wireless microphone can be alerted so that the wireless microphone can then send on this free frequency.
In case the mobile terminal has, for example, a Bluetooth or WLAN interface, the wireless audio transmission can take place via Bluetooth or WLAN. The computer capacity available in the mobile terminal can be used for decoding and preparing the audio signals so that no external, separate wireless receiver is necessary.
The wireless microphone DM can also (optionally) have a control unit SSE which can be used to control the wireless receiver DE and/or the mobile terminal ME. Accordingly, a remote control function can be implemented for the mobile terminal by means of this control unit SSE, the wireless microphone functioning as a remote control. In this case, the remote control signals are sent from the wireless microphone DM to the wireless receiver DE which in turn conveys the received signals to the mobile terminal ME. A remote control reception unit FEE can be implemented in the mobile terminal. This remote control reception unit FEE analyzes the remote control commands transmitted by the wireless microphone and controls the mobile terminal in a corresponding manner. This opens up the possibility for a presenter to give a presentation by means of the mobile terminal without requiring an additional external device.
In addition or alternatively, the mobile terminal can be designed to communicate wirelessly with loudspeakers, loudspeaker systems, light control systems or PA systems. This communication can be carried out, for example, on a Bluetooth protocol, WLAN protocol, or the like. Accordingly, when a presentation is to be given, the level of the individual signal sources need only be adjusted to the mobile terminal and the microphone switched on. A presenter is accordingly free to give a presentation by means of the remote control function of the wireless microphone described above and need not have to resort to the mobile terminal.
The data and programs required for the reception of a wireless microphone can be stored, for example, on a mobile external data carrier such as, e.g., a CD, a USB stick or, alternatively, on a server on the Internet so that it is easily possible to adapt the mobile terminal to the respective wireless microphone.
The digital audio signal processing is preferably carried out in the mobile terminal as a software application. Optionally, a feedback suppression system can be provided to prevent any feedback. Further, room acoustics can be monitored automatically (for example, by means of the wireless microphone and/or a microphone in a laptop, for example). The detected room acoustics parameters can then be taken into account correspondingly in the digital audio signal processing.
When the mobile terminal is designed as a notebook, for example, a window can be provided for correspondingly changing the functions of the wireless microphone, wireless receiver and acoustic properties of an audio reproduction device. For example, this can be a matter of influencing the volume level. This window should preferably always be arranged in the foreground so that the mobile terminal can be accessed quickly and reliably.
While the foregoing description and drawings represent the present invention, it will be obvious to those skilled in the art that various changes may be made therein without departing from the true spirit and scope of the present invention.
Number | Date | Country | Kind |
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10 2006 032 822.1 | Jul 2006 | DE | national |