Abstract: A method and apparatus for determining an individual's identity who has authority to add a user to a talkgroup (approver) is provided herein. During operation, a context of a user requesting access to a talkgroup is determined. Past contexts for individuals who have requested access to past talkgroups are determined along with past approvers who approved adding the individual to the talkgroup. The current context is used to find similar past contexts and the past approver for the similar past context. The past approver is then used to authorize the current request for approving joining of the talkgroup.

Abstract: An electronic device. The electronic device includes: a microphone module, a data input/output interface module, and a sound transmission channel. The data input/output interface module includes an input/output interface jack. The sound transmission channel includes a first port and a second port, the first port meets the input/output interface jack, and the second port meets the microphone module.

Abstract: A method for Tx interference cancellation and power detection in a wireless device is described. A portion of a Tx output signal is down-converted to generate a feedback signal. A reconstructed interference signal and a weight are generated based on the feedback signal. A Tx power level is detected based on the weight. The reconstructed interference signal is subtracted from the Tx output signal.

Abstract: A signal transforming method receives external analog audio signal through an audio I/O interface on a mobile device. The mobile device installs an application program therein, and the mobile device transforms the received analog audio signal into a digital signal according to a predetermined decoding reference via the application program. The mobile device can then execute corresponding works according to the transformed digital signal. In the other hand, the mobile device can also transform any type of digital signal into analog audio signal and transmits and receives the transformed analog audio signal via the audio I/O interface on the mobile device, therefore, the arrangement of other data transmitting interfaces of the mobile device can be saved.

Abstract: In one embodiment, a receiver front end circuit can receive and process multiple radio frequency (RF) signals and output downconverted signals corresponding to these signals. In turn, multiple signal processors can be coupled to this front end. Specifically, a first signal processor can receive and process the downconverted signals to output a first signal obtained from content of a first RF signal, and a second signal processor can receive and process the downconverted signals to output a second signal obtained from content of a second RF signal. In addition, the apparatus may include a detection circuit coupled to the receiver front end circuit to detect presence of at least the second signal and enable the second signal processor responsive to the detected presence.

Abstract: A wireless communications device, e.g., a mobile node supporting direct peer to peer communications, performs a self-calibration of one or more of: receiver IQ imbalance, transmitter IQ imbalance, receiver DC offset, and transmitter DC offset. The wireless communications device, operating in calibration mode, intentionally sets the oscillator frequency used for downconversion in its receiver module to a different frequency than the oscillator frequency used for upconversion in its transmitter module. A first baseband signal, e.g., a single tone test signal, is input to the transmitter module and an upconverted transmit signal is generated. The transmit signal is routed via a feedback loop to the receiver, which performs a downconversion operation. Power and/or phase measurements of the signals output from the downcoversion are used to determine IQ imbalance compensation information and DC offset compensation information.

Abstract: A distribution apparatus which distributes to multiple regions includes: a storage unit which stores each of radio communications systems usable for each of the regions; a selecting unit which selects, out of the multiple regions to which the distribution apparatus distributes, first regions in which a radio communications system in operation is the same; and a distribution unit which distributes, based on each of the radio communications system usable for each of the regions that is stored in the storage unit, all or some of information on the radio communications system for each of the first regions selected by the selecting unit. One or multiple radio communications systems are usable in each of the regions.

Abstract: A delivery apparatus for delivering to multiple areas, wherein one or more radio communication systems are available in each of the areas, includes a storage unit configured to store system information for each of the areas, the system information being required to connect to the available radio communication systems, a detection unit configured to detect a second delivery apparatus for delivering to a portion of the delivery areas of the delivery station and a delivery unit configured to deliver system information for each of the areas as control information, the system information being required to connect to a radio communication system available in the area.

Abstract: The present invention is a wireless headphones device utilized by a user with a head that includes a right headphone that has an exterior cover portion and an interior portion and includes a radio tuner, a volume control button, a display screen, a recharging port, a headband and a first plurality of pads and a left headphone that has an exterior cover portion and an interior portion and includes a SD card insert, a second plurality of pads and a plurality of control buttons, wherein the headband has an inside surface and adjustably places the wireless headphones device over the user's head.

Abstract: To provide a mobile terminal capable of achieving the optimal volume according to a style without causing discomfort to the user. A mobile terminal in accordance with the present invention includes a main body including a microphone 219, a screen display unit including speaker-and-receiver units 226 and 227 at both ends thereof, the screen display unit being disposed in the main body in such a manner that the screen display unit can slide and rotate with respect to the main body, and switches 224 and 225 that select the speaker or the receiver to be used in respective speaker-and-receiver units according to a style formed by the screen display unit and the main body.

Abstract: The invention is a method of transmitting a radio signal using a complex envelope elimination and restoration technique. The method includes receiving a radio frequency (RF) signal. Further, the method includes separating the RF signal into an in-phase baseband signal (I) and a quadrature baseband signal (Q). Still further, the method includes decomposing the (I) signal into a in-phase magnitude component and a in-phase phase component while decomposing the Q signal into a quadrature magnitude component and a quadrature phase component. Alternatively, the source signal could be digital baseband information. Digital signal processing could generate the phase and magnitude reference signals for the system.

Abstract: A method and device for activating a media player enables efficient and convenient access to media files. The method includes determining that a wireless communication device is not operatively coupled to a network. An operative coupling of a speaker system to the wireless communication device is detected. The media player is then activated automatically in response to detecting the operative coupling of the speaker system to the wireless communication device.

Abstract: A signal transmitting device of the present invention includes a plurality of drums and a sound module. Each drum has a pickup and a wireless signal transceiver, and the sound module includes several wireless signal receivers, each of which corresponds to one of the drums. While the drum is beaten upon, the pickup sends a signal to the wireless signal transceiver, and the signal is then transmitted to the corresponding wireless signal receiver wirelessly. Thereby, the complex wiring process can be significantly simplified or even totally resolved.

Abstract: A wireless communication system based on a directional speaker is disclosed. The system can include an interface unit and a base unit. The audio signals from the speaker can be generated by transforming ultrasonic signals in air. This allows the production of directional audio signals even when the aperture of the speaker has dimensions in the order of a few centimeters. The audio signals from the speaker can be heard hands-free. Further, privacy protection is enhanced. In one embodiment, the interface unit can be attached or integrated to a piece of clothing at the shoulder of the user, with the audio signals from the speaker directed towards one of the user's ears. The wireless communication system can be applied to a number of different areas, including a communication device, such as a cell phone; a hearing aid; an entertainment system; and a computation system, such as a personal digital assistant or a computer.

Abstract: A method and device for activating a media player enables efficient and convenient access to media files. The method includes determining that a wireless communication device (100) is not operatively coupled to a network. An operative coupling of a speaker system (205) to the wireless communication device (100) is detected. The media player is then activated automatically in response to detecting the operative coupling of the speaker system (205) to the wireless communication device (100).

Abstract: A mobile electronic device is provided with a housing, a loudspeaker, a cavity coupled to the loudspeaker, and a slide mechanism configured to move a portion of the housing between a first position and a second position. In the second position of the slide mechanism, an inner volume of the cavity is increased as compared to the first position.

Abstract: An apparatus and method for outputting audio in a portable terminal are provided. The apparatus includes a communication module for transmitting/receiving a call connection request and speech signals during a call connection service; an audio processor connected to at least one audio output device, for controlling the output audio data/speech signals through the audio output device, which is a first audio output device, and checking whether another audio output device is connected; and a controller for checking at the audio processor whether there is another audio device, which is a second audio output device, for outputting the speech signals received while outputting the audio data of an application service through the first audio output device, and when there is the second audio output device, for controlling the output of the speech signals through the second audio output device.

Abstract: Disclosed is a method for providing heterogeneous services using a PIP function in a terrestrial DMB receiver. The method includes: a first step of receiving a key input for activating the PIP function and displaying a list of services in an available ensemble during use of a desired DMB service; a second step of selecting a desired item in the list of services; a third step of identifying if the desired item selected at the second step is an “exchange” function and identifying if PIP function of the terrestrial DMB receiver is activated when the selected item is the “exchange” function; a fourth step of exchanging a service of a main screen for a service of a PIP screen, when it is identified that the PIP function is activated at the third step; and a fifth step of identifying if the desired item selected at the second step is the “exchange” function and displaying the selected item on the PIP screen when the selected item is not the “exchange” function.

Abstract: An earphone jack for a mobile communication terminal and a driving method thereof, wherein the earphone jack includes a first speaker terminal for providing a positive (+) differential call voice signal when a call voice signal is output, a second speaker terminal for providing a negative (?) differential call voice signal when the call voice signal is output, and a switchable ground terminal for maintaining a ground on state when a media sound source is output, and becoming a ground off state when the call voice signal is output. The method includes the steps of determining whether an audio signal to be currently output is a media sound source signal (that is, a sound source media data signal), or a call voice signal (that is, a wireless call voice signal), and when the media sound source signal is output, maintaining a ground on state and outputting the media sound source signal in stereo, and when the call voice signal is output, maintaining a ground off state and outputting a differential signal.

Abstract: The present invention is directed towards a portable electronic equipment (10) comprising a speaker (16) and a receiver (18), wherein the receiver (18) is damped while the speaker (16) is active to provide good sound reproduction.

Abstract: In a condenser microphone where a microphone capsule and an output module section are connected to each other via a microphone cord, strong electromagnetic waves generated from a cellular phone or the like are positively prevented from entering the output module section through the microphone cord. The condenser microphone in which a microphone capsule 10 and an output module section 20 are connected to each other via a microphone cord 30 composed of a twin-core shield covered wire, the microphone capsule 10 including a condenser microphone unit 12 and an impedance converter 13, the output module section 20 storing, in a shield case 21, a circuit board 22 including a voice output circuit, wherein a shield covered wire 33 of the microphone cord 30 is connected to the shield case 21, and the shield covered wire 33 is also connected to a ground circuit of the circuit board 22 via a high-frequency choke coil 51.

Abstract: A technique is provided for reducing power consumption of an internally powered console in an audio system through frequency based signal routing. A system employing the technique includes a base unit having an interface for receiving a signal representative of acoustic information. The base unit includes a filter system for splitting the signal into low-frequency and high-frequency component signals. The low-frequency signal is routed to a first audio driver for reproduction. The high-frequency signal is routed to a device that includes a second audio driver. By removing the need to reproduce the low-frequency portion of the acoustic information, the power consumption of the device is reduced.

Abstract: Apparatus for detecting the envelope of an RF signal that comprises an RF transistor operating essentially at a non-linear operating point at the RF frequency range; a DC power supply for feeding the RF transistor; a dummy load for terminating the output of the RF transistor; and at lease one impedance, through which the DC power supply feeds the RF transistor, for obtaining an indication signal developed across the impedance. The indication signal represents the envelope, from the fluctuating current drawn by the RF transistor from the DC power supply during the time period when the RF signal is applied to the feeding input.

Abstract: A mobile wireless communication device has a speaker that functions as a vibration alert in addition to an audio output device. The speaker is selected from a group of speakers having variation in mechanical vibration resonant frequency. A drive signal sweeps back and forth across a sweep frequency range including the varient speaker mechanical vibration resonant frequencies. The drive signal drives the speaker causing it to vibrate at the mechanical vibration resonant frequency and in turn causing the mobile wireless communication device to vibrate, thereby alerting the user. In this manner, the same drive signal can be used to vibrate each speaker at the speaker's mechanical vibration resonant frequency despite the variation in mechanical vibration resonant frequencies among the group of speakers.

Abstract: A method and apparatus for, interactively with a broadcast program that is being performed, enabling access to supplementary materials related to the program from a broadcast signal that is a combination of a programming signal and a supplementary materials signal. The broadcast output signal is received at a location of an audience. The programming signal of the received output signal is performed for the audience, with reproduction equipment. A signal related to the supplementary material signal is extracted from the received broadcast signal. Access to the supplementary material corresponding to the supplementary material signal is enabled in response to an interactive control signal actuated by a member of the audience tuned to the programming signal being performed, and based on the extracted signal.

Abstract: To address the need for a power modulator that can efficiently operate within a wideband, high-speed communication system, a method and apparatus for power modulation is provided herein. In accordance with the preferred embodiment of the present invention an envelope reference signal is filtered in such a way that the bandwidth is reduced while keeping the instantaneous level of the filtered signal is greater than the unfiltered envelope level. Because the bandwidth of the envelope signal is reduced, efficient operation of the switching modulator can be achieved within wideband, high-speed communication systems.

Abstract: Apparatus for detecting the envelope of an RF signal that comprises an RF transistor operating essentially at a non-linear operating point at the RF frequency range; a DC power supply for feeding the RF transistor; a dummy load for terminating the output of the RF transistor; and at lease one impedance, through which the DC power supply feeds the RF transistor, for obtaining an indication signal developed across the impedance. The indication signal represents the envelope, from the fluctuating current drawn by the RF transistor from the DC power supply during the time period when the RF signal is applied to the feeding input.

Abstract: In a multimedia system for a vehicle, a plurality of multimedia units are connected to one another by an optical bus laid as a ring line. An interface unit, situated at an arbitrary point in the ring line or integrated into one of the multimedia units establishes a radio connection between the multimedia system and an external unit, which for example transmits traffic information to the multimedia system.

Abstract: A digital transmission system for replacing complex, many-wire, analog system in transportation and construction vehicles includes a uni-directional or bi-directional signal bus structure and a optional power bus structure. The signal bus structure is composed of uni-directional or bi-directional signal carriers. Uni-directional or bi-directional signal tap lines attach to the signal bus with terminal devices. The signal bus and tap lines terminate in microprocessor devices that generate, prioritize, send, receive, and process signals that are sent through the signal bus and its tap lines. Electro-mechanical, electrical, and electronic devices attach either directly or through converters to the terminating microprocessors. When any terminal device is operated or otherwise generates information, the microprocessor to which the device is attached generates a signal identifying the device and prioritizing and coding the information that is generated.

Abstract: An audio communications system enables a person using an stereophonic audio headset to selectively communicate simultaneously with two or more persons. The system includes a headset having a first earphone for reproducing a first voice communication in response to a received first audio communication signal and a second earphone for reproducing a second voice communication in response to a received second audio communication signal. Control means located for use by a person wearing the headset selectively enable the first voice communication to be reproduced by the first earphone and/or the second voice communication to be reproduced by the second earphone. Attention signals associated with the respective earphones are received and processed by the control means. A microphone output signal produced by a microphone on the headset can be selectively provided to a plurality of output terminals and an attention signal can be selectively provided with the microphone output signal to selected output terminals.

Abstract: A radio with a tuner and other program sources uses a digital signal processor (DSP) to enhance the audio signal and to generate a stream of digital data including audio data and control data corresponding to loudness functions. A fiber optic data link couples the data stream to a plurality of remote DSP modules each of which drive one or more speakers. Each module contains a user programmed DSP, a digital to analog converter and an amplifier for each associated speaker. The DSP modules are identical except for software parameters which establish a transfer function and a loudness characteristic for each speaker. The same DSP modules and the same speakers can be used in several vehicle types and the system audio performance can be optimized by customizing software for each type of vehicle.

Abstract: The invention relates to a headset (1) for a hearing protector provided with a padding part (12) having an essentially elliptical ear opening (18). The headset comprises a microphone (2), an earphone (3), and conducting wires (7) for bringing signals to the earphone (3) and from the microphone (2). According to the invention the earphone (3) is attached to a bow part (10) whose contour essentially follows the external dimensions of the hearing protector padding (12), and a mounting wing (13, 4) is connected to the bow part (10) or the earphone (3) and has a maximum dimension (A) which is smaller than the maximum dimension of the ear opening (18) and yet greater than the minimum dimension (B) of the ear opening (18), and during use the maximum dimension of the mounting wing (13, 4) is essentially horizontal.

Abstract: Subject-matter of this invention is a live voice device particularly for cellular telephone apparatus for use in motor vehicles equipped with a radio receiver apparatus including a low frequency power amplification section and a loudspeaker system for diffusion of sounds and equipped with a magnetic head to read a magnetically recorded tape, having electronic means adapted to handle the cellular phone low frequency signals for a free-hand and in live voice condition conversation with the telephone apparatus and through said loudspeaker system.

Abstract: A combination radio (10) is provided for enabling the user to listen to two independent radio stations at one time. Alternatively, the combination radio (10) can be tuned into the same radio frequency to allow the user to combine the sound output from each individual radio. Moreover, additional radios can be added to the combination radio to increase the sound output of the system.

Abstract: Carrier frequencies different in frequency from each other are modulated with broadcast signals different from each other, and the thus modulated signals are transmitted through a single transmission line and are suited for reception and demodulation. A programming circuit allows programming of a plurality of different programs, with each program being able to be programmed to activate any selected receivers of a plurality of receivers, and to tune each of the selected receivers to any selected carrier frequency. The different programs are stored in a memory, and each of the receivers is connected to a speaker. A selection circuit allows a user to select any one of the different programs to output the broadcast signals at selected frequencies from selected speakers.

Abstract: A console speaker assignment system that is self-prompting and which allows speaker assignment to be changed without interrupting the reception of audio signals or without interrupting normal console operation.

Abstract: A device for producing a voice warning over a speaker which is also used with an entertainment sound production system such as a radio or cassette recorder. The voice warning device incorporates a switching device in the circuit between the speaker and a source of entertainment sound-bearing electric signals, and also incorporates a mechanism for selectively generating electric signals representing human voice sounds for conveying warnings. When a warning signal is being generated, the switching device is switched over from its state where it connects the speaker to the entertainment sound-bearing electric signals to its state where it connects the speaker to the warning signals. Optionally, several different speakers of an entertainment system may be selectively connected to said warning signals by several switching devices.