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| Number | Title | Issue Date |
| 7925004 | Speakerphone with downfiring speaker and directional microphones A speakerphone having improved echo cancellation and sound output includes at least one directional microphone having at least one axis of sensitivity and at least one zone of insensitivity, and a speaker disposed in the zone of insensitivity of the microphone to ra... | 04/12/2011 |
| 7319889 | System and method for conserving battery power in a mobile station In one embodiment, a mobile station including a chassis having a display, a power reducer, a proximity sensor, and a microprocessor. The power reducer controls power consumption of the display. The proximity sensor is coupled to the chassis and causes the power cons... | 01/15/2008 |
| 7302280 | Mobile phone operation based upon context sensing A mobile device is provided that includes at least one sensor that provides contextual information to the device. When the mobile device receives an incoming message, or notification, the device responds thereto based at least in part upon the contextual information... | 11/27/2007 |
| 7289102 | Method and apparatus using multiple sensors in a device with a display In a device having a display, at least one sensor signal is generated from a sensor in the device. One or more context values are then generated from the sensor signal. The context values indicate how the device is situated relative to one or more objects. At least ... | 10/30/2007 |
| 7272233 | Acoustic shock prevention Acoustic shock is reduced by attenuating an input signal based on tones detected through frequency domain analysis. The spectrum of the input signal is obtained. A relative energy signal includes a plurality of relative energy elements, each representing the relativ... | 09/18/2007 |
| 7263373 | Sound-based proximity detector A proximity detector for use in a mobile telephone having at least a microphone and a loudspeaker operatively connected to a signal processor is presented. The proximity detector includes data processing and control modules having a module for controlling the signal... | 08/28/2007 |
| 7260213 | Telephone echo canceller The invention relates to an echo canceling device and method for an arrangement for transmitting audio signals, in particular uttered speech with an echo filter for canceling echo. The echo filter is arranged between an input channel (1) and an output channel... | 08/21/2007 |
| 7257422 | Portable radiotelephone apparatus A portable radiotelephone apparatus having a microphone and an earpiece electrically connected individually to respective wires of a two-wire electrical line, and a retraction mechanism with a one-way lock device for the line. ... | 08/14/2007 |
| 7231348 | Tone detection algorithm for a voice activity detector There is provided a voice activity detection method for indicating an active voice mode and an inactive voice mode. The method comprises receiving an input signal having a plurality of frames, determining whether each of the plurality of frames includes an active vo... | 06/12/2007 |
| 7224794 | Transmitting message playback concurrent with speakerphone operation A digital telephone answering device having speakerphone capability allows a recorded message to be played back and heard by the far-end party as well as over the local speakerphone by the near-end party during speakerphone operation as if it were a normal receive s... | 05/29/2007 |
| 7206406 | Call system This invention enables freely changing over a handsfree call and a handset call using an information terminal. A call system of this invention includes: a handsfree call microphone and a handsfree call loudspeaker; a first sound device that inputs and outputs a soun... | 04/17/2007 |
| 7196316 | Portable electronic device with activation sensor An electronic device having a first piece, a second piece moveable with respect to the first piece, and a position sensor operable to sense the position of the second piece relative to the first piece. The electronic device is operated in a first mode or a second mo... | 03/27/2007 |
| 7194084 | System and method for stereo conferencing over low-bandwidth links Systems and methods are disclosed for packet voice conferencing. An encoding system accepts two sound field signals, representing the same sound field sampled at two spatially-separated points. The relative delay between the two sound field signals is detected over ... | 03/20/2007 |
| 7187718 | System and method for encoding and decoding digital data using acoustical tones A system and a method for the transmission and reception of digital data wirelessly using acoustic tones comprises an encoder, a data interleaving system, an error correction system, and a decoder. The digital data is decoded by using in-phase and quadrature filters... | 03/06/2007 |
| 7171004 | Room acoustics echo meter for voice terminals The present invention provides an indication to the user of a voice communication system that an echo at the user's location has been detected by the system. In response to receiving this indication of echo, users may take any of several actions to reduce the echo, ... | 01/30/2007 |
| 7120238 | Sensor-controlled telephone system A telephony system and method are adapted for selecting an operating mode of a telephony system responsive to sensor inputs. A presence detector, communicatively coupled to the telephony system, detects people within a predetermined area associated with the telephon... | 10/10/2006 |
| 7113811 | System and method for conserving battery power in a mobile station A mobile station and a method of conserving battery power consumed thereby. In one embodiment, the mobile station includes: (1) a chassis having a display and (2) a proximity sensor coupled to the chassis and adapted to cause a power consumption of the display to be... | 09/26/2006 |
| 7054436 | Communication terminals with a dual use speaker for sensing background noise and generating sound, and related methods and computer program products Communication terminals, methods, and computer program products are provided that sense background noise via a speaker that is also used to generate sounds. In some methods of operating a communication terminal, and a speaker signal is supplied to a first speaker to... | 05/30/2006 |
| 7054450 | Method and system for ensuring audio safety The invention concerns a method (200) and a system (100) for ensuring audio safety in an audio device (110). The system includes a processor (112), a sensor (116), an analog safety circuit (114) and a first feedback loop ( | 05/30/2006 |
| 7050576 | Double talk, NLP and comfort noise A state machine for attenuating the transition into and out of NLP state to reduce voice clipping and to reduce echo leak in a voice over packet signal transmission. The state machine interposes two additional transitional states between the NLP active state and the... | 05/23/2006 |
| 7023983 | Versatile circuit for interfacing with audio headsets A signal conditioning circuit is described which can facilitate dual mode use of a connector circuit, e.g., audio mode or data mode. In other words, a headset or alternatively, a data interface may be coupled to the connector circuit and signal conditioning circuit,... | 04/04/2006 |
| 6996231 | Step size convergence control A method of converging a step size control for an adaptive filter of a communication channel including: (1) initializing a nominal step size value and a penalty point value; (2) combining the nominal step size value and the penalty point value to generate a step siz... | 02/07/2006 |
| 6980528 | Voice and data exchange over a packet based network with comfort noise generation A signal processing system which discriminates between voice signal and data signals modulated by a voiceband carrier. The signal processing system includes a voice exchange, a data exchange and a call discriminator. The voice exchange is capable of exchanging voice... | 12/27/2005 |
| 6973179 | Pocket speakerphone A pocket speakerphone adapter for a landline-based common telephone to provide the common telephone with speakerphone capabilities. The conventional handset of a conventional common telephone is disconnected from the handset jack of its base unit, and the pocket spe... | 12/06/2005 |
| 6973184 | System and method for stereo conferencing over low-bandwidth links Systems and methods are disclosed for packet voice conferencing. An encoding system accepts two sound field signals, representing the same sound field sampled at two spatially-separated points. The relative delay between the two sound field signals is detected over ... | 12/06/2005 |
| 6967566 | Live-action interactive adventure game An interactive treasure hunt game is provided. Game participants receive a card, map and/or identification badge configured with an RFID tag, bar-code or a magnetic “swipe” strip or the like. The RFID tag or other identifying device is used to store certain info... | 11/22/2005 |
| 6952672 | Audio source position detection and audio adjustment A method for adjusting an operational characteristic of an audio device can include a series of steps. The method can include receiving a user spoken utterance from an audio speech source and detecting a position of the audio speech source relative to the audio devi... | 10/04/2005 |
| 6947773 | Method and apparatus for reducing echo feedback in a communication system A method and apparatus for reducing echo feedback in a wireless communication system (10) is accomplished when a receiving communication unit (24) senses a feedback signal, or echo, via an ancillary communication path. The receiving communication unit ... | 09/20/2005 |
| 6944310 | Speaker apparatus A speaker apparatus includes an elliptical-shaped or a round-edged rectangular-shaped vibration plate; an edge damper portion disposed on an outer peripheral edge portion of the vibration plate; a recessed portion formed between said vibration plate and said edge da... | 09/13/2005 |
| 6940968 | Telephone terminal apparatus and method A telephone apparatus comprises a first audio input device, a second audio input device, a first audio output device, and a second audio output device. The telephone apparatus is operative to couple the first audio input device and the first audio output device to a... | 09/06/2005 |
| 6937724 | Apparatus and method for delivery of ringing and voice calls through a workstation A data processing system comprises an audio processing means receiving data within said data processing system for converting the data into an analog signal with a first and a second analog channel components; an audio output means receiving the analog signal and pr... | 08/30/2005 |
| 6931124 | Soft mute circuit A soft mute circuit includes a programmable amplifier controlled by a register. Data is stored in the register from an adder that combines the current data in the register with a second number for increasing or decreasing the gain of the amplifier. A summation circu... | 08/16/2005 |
| 6842516 | Digital adaptive filter and acoustic echo canceller using the same To achieve an improved convergence behaviour for, e.g., echo cancellation there is provided a digital adaptive filter which includes a filter coefficient update means to successively update filter coefficients in accordance with an input signal, an estimated power o... | 01/11/2005 |
| 6785382 | System and method for controlling a filter to enhance speakerphone performance In a speakerphone system, the signal that is directed to a loudspeaker is filtered by a dynamically controllable highpass filter. The filter characteristics are adjusted on the basis of the power of the signal and the degree of recent microphone activity. The filter... | 08/31/2004 |
| 6785381 | Telephone having improved hands free operation audio quality and method of operation thereof A telephone having a hands-free mode of operation. The telephone includes a pair of microphones spaced apart from each other. Each microphone receives sound in hands-free mode of operation and provides audio signals representative of received sounds. The audio signa... | 08/31/2004 |
| 6754337 | Telephone having four VAD circuits Voice activity is detected by comparing a signal with two thresholds and producing data representing the energy of the signal. The data, in binary form, is compared with thresholds to determine voice activity. In accordance with another aspect of the invention, the ... | 06/22/2004 |
| 6700506 | Bus arrival notification system and methods related thereto The present invention relates to a system and methods for notifying passengers of an approaching vehicle. Utilizing this invention, passengers can remain in a safe, controlled environment, avoiding harsh environmental conditions and excessive waiting time... | 03/02/2004 |
| 6636750 | Speakerphone accessory for a portable telephone A speakerphone accessory (100) is provided for use with a portable telephone (102). The speakerphone accessory (100) has a high-level speaker assembly (222) that includes a transducer (500) coupled to first and second resonators (502, 504). The first and ... | 10/21/2003 |
| 6563925 | Method and apparatus for space-time echo cancellation Echo is canceled in a communication device including at least one microphone and a loudspeaker. Signals directed to the loudspeaker are filtered through at least one first filter. The filtered signals are subtracted from signals received by the microphone... | 05/13/2003 |
| 6535604 | Voice-switching device and method for multiple receivers A voice-switching device for use in a telephone terminal which applies an optimal amount of switched loss to a plurality of distinct receive transducers. The voice-switching device detects speech signals on the transmit and receive paths to determine a mo... | 03/18/2003 |
