Abstract: Herein disclosed is a wireless headphone apparatus, comprising: a plurality of light signal receiving units each for receiving a light signal to produce an electric signal having a signal level; a plurality of light signal limiting units respectively connected with the plurality of light signal receiving units in one to one relationship, each of the light signal limiting units operative to allow only an electric signal having a signal level lower than a predetermined threshold value to pass therethrough and delete an electric signal having a signal level equal to or greater than the predetermined threshold value; a signal synthesizing unit for synthesizing the electric signals passed through the light signal limiting units to produce a synthesized electric signal; and speaker means for outputting a sound in response to the synthesized electric signal.

Abstract: A technique is used for providing additional information about a broadcast presentation that allows a user interested in the additional information to acquire it easily, using a selective call device or a television remote control device to easily acquire an information address during the broadcast when a prompt is presented during the broadcast. An advertiser can send the additional information over a wide area radio selective call communication system or can post it at a universal resource locator of a computer network. The information address is used to acquire the additional information. The information address can be stored, selected and deleted in the selective call device or remote control device. The prompt can be disabled or enabled manually or based on location.

Abstract: A multi-frequency RFID remote communication system is provided that includes a plurality of RFID tags configured to receive a first signal and to return a second signal, the second signal having a first frequency component and a second frequency component, the second frequency component including data unique to each remote RFID tag. The system further includes a reader configured to transmit an interrogation signal and to receive remote signals from the tags. A first signal processor, preferably a mixer, removes an intermediate frequency component from the received signal, and a second processor, preferably a second mixer, analyzes the IF frequency component to output data that is unique to each remote tag.

Abstract: A method and system for reliably returning to a traffic channel in a wireless communications system after performing E911 GPS measurements is provided. The method establishes a communications link using a device in a communications system having at least one communication channel. The device also includes a processor and a tuner and is configured to establish communication over the communication channel. The communication is based upon receiving a first radio frequency (RF) signal including data frames. The method includes tuning to receive a second RF signal, wherein the tuning interrupts reception of the first RF signal. The communication over the communication channel is maintained during the interruption. The method also includes processing the data frames during the tuning, updating a signal search space associated with the first RF signal during the processing, and searching for the first RF signal within the updated search space. The first RF signal is then re-acquired in accordance with the searching.

Abstract: It is to provide an infrared communication adapter which can carry out a data exchange with an external equipment having an infrared communication interface even though a portable telephone does not have an infrared communication function.

Abstract: A communication device including an RF transmitter mounted in conjunction with an IR transmitter allowing data to be transmitted by RF as well as by IR. Such a device may be a portable badge worn by moving personnel to transmit IR and RF signals to one of a plurality of second devices each being a fixed reader having an IR and RF receiver, and typically being mounted in a respective enclosed space, such as a room. In use, IR transmissions from the portable device are detected by the IR receiver of the reader in the same room and thus provide an immediate identification of the room (or enclosed space) wherein the portable device is located. On the other hand, if the IR transmitter in the portable device is concealed or for any other reason is not within line-of-sight of the reader in its immediate proximity, then the RF signal transmitted by the RF transmitter in the portable device is detected by the RF receiver in the reader, thereby allowing tracking of the portable device in either eventuality.

Abstract: In a method of operating a remote control system and in such a system comprising an RF transmission and receiving system and an IR transmission device the sub-carrier information of the IR signal is transmitted in the RF signal in a signal separate from the envelope information of the IR signal which is contained in a envelope signal.

Abstract: A full duplex infrared wireless communication device is disclosed for use with any of a plurality of electronic devices. The system includes a remote unit and a base. The device is adaptable to be used with any of a plurality of devices, including cellular, portable and landline telephones. The base unit electrically connects with the electronic device to adapt signals from the electronic device for transmitting to the remote unit via a first infrared wavelength. The remote unit transmits signals to the base unit on a second infrared wavelength. When used with a telephone, the remote unit includes a headset with a speaker, a microphone, and data processing circuitry to receive digital signals on the first infrared wavelength and to transmit digital signals on the second infrared wavelength.

Abstract: An improved receiver (5) of a remote control system, in particular for closing systems of a motor vehicle, and a method for operating such a remote control system are proposed. Modern motor vehicle closing systems are equipped with remote control systems which, in addition to the central locking of the doors, also perform so-called comfort functions such as the closing of the windows or of the sunroof. For safety reasons, such a comfort function must be terminated as soon as a signal fails to be received. If the remote control system is activated at the limit of its range, the response threshold of the receiver (5) may be undershot as a result of the transmitter (1) moving. This leads to undesired breaking off of the comfort function, or to jerky operation of the comfort function. According to the invention, it is therefore proposed to implement the response threshold of the receiver so that it is capable of being switched over.

Abstract: A remote control system in which a program-up or program-down activation on a control remote device effects the selection of the next or prior available channel that is likely to contain a program of a particular selected genre, or category. The system includes an identification of those programs that are likely to relate to each particular category. When the user selects a category, the user incrementally selects from the programs contained within the selected category. In the system, a list builder includes a number of capabilities for improving the selective quality of the program selection, having access, for example, to an information source that provides the time of each scheduled program on each channel, and an indication of each program's genre, rating, and other related items.

Abstract: A short range inductively coupled wireless communication system employs analog frequency modulation of a high frequency carrier and magnetic coupling between a transmitting antenna and a receiving antenna. A transmitter coupled to the transmitting antenna modulates multiple high-fidelity analog audio signals and digital control messages onto separate high frequency (“HF”) carriers. The electric field portion of the transmitted electromagnetic field is substantially eliminated during transmission, while the magnetic field portion is substantially unaffected. The receiving antenna is coupled to a demodulator which reproduces the audio frequency signals and decodes control messages sent by the transmitter.

Abstract: The invention relates to a communication system, having at least one mobile communication device which has at least one actuating means for tripping an action of at least one piece of equipment communicating with the communication device. It is provided that within a usage area (10) of the at least one communication device (12), defined regions (16, 18, 20, 22, 24) are assigned position marks (36, 38, 40, 42, 44), which when the communication device (12) enters one of the defined regions (16, 18, 20, 22, 24) of the communication device (12) impart the current position for switching over a function setting of the at least one actuating means (50).

Abstract: An electronic timepiece having a universal, wireless controller for transmitting wireless signals that control features of a plurality of systems. In a first aspect of the present invention, the electronic timepiece includes a data store which contains a library of control signals. In one embodiment, the library of control signals may be detached from the electronic timepiece so that new control signals may be added to the library. Each of the control signals can be retrieved and transmitted by the universal, wireless controller to emulate a conventional wireless transmitter which controls functions of a corresponding one of the plurality of systems. The electronic timepiece includes the capability for selectively retrieving a control signal for a target system from the library. In one embodiment of the present invention, the selective retrieving is performed in response to input entered through a programmable interface.

Abstract: A learning-type remote control device is capable of detecting both carrier frequency and control code in a remote control signal that is transmitted by a target remote control device, and includes a variable-frequency oscillating unit for generating a carrier signal having a frequency which varies according to magnitude of a frequency control signal from a digital-to-analog converting unit, a mixing unit for generating a mixed signal by mixing the carrier signal and the remote control signal, a signal detecting unit for generating a detected frequency signal and a detected control signal from the mixed signal, and a processing unit operable in a learning mode to provide a varying frequency count input to the converting unit. The processing unit detects lower and upper sideband frequency counts based on when the detected frequency signal from the signal detecting unit reaches a preset threshold voltage to determine a frequency count that corresponds to the carrier frequency of the remote control signal.

Abstract: A control system enables telephone calls to be answered remotely using a remote control unit also adapted to remotely control an electronic device such as VCR. A processor based station may communicate with a remote control unit using both infrared and radio frequency protocols to enable remote telephone communications and remote control of electronic devices.