| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 381028000 | Amplifier | 33 |
| 20090116654 | ON-THE-FLY INTRODUCTION OF INTER-CHANNEL DELAY IN A PULSE-WIDTH-MODULATION AMPLIFIER - A multiple-channel audio processor ( | 05-07-2009 |
| 20090175458 | Subwoofer docking station - A subwoofer stereo system with a docking base for docking a portable digital media player comprises a generally hexahedron cabinet made of a panel material for encasing at least an electronic media processing unit and an amplifier for driving stereo speakers. The docking base has an attachment of modular connector board having at least one main connector for the portable digital player and at least one auxiliary phone plug. The docking base is mounted through the top panel extending in part inwardly of the cabinet as well as outwardly in part for receiving the portable player. A first shielding chamber extends from under the top panel invisibly to enclose the inward part of the docking base to isolate it from interior of the cabinet and a second shielding chamber extends from behind under the front panel invisibly to enclose the control interface to isolate it from interior of the cabinet. | 07-09-2009 |
| 20090285404 | ACOUSTIC CALIBRATION SOUND SYSTEM - An acoustic calibration sound system includes a coordinate position detecting device and a host. The coordinate position detecting device is used for detecting a position of a listener in a space plane and issuing a corresponding position signal. The host outputs an audio signal. The host has an acoustic characteristic parameter matrix containing multiple acoustic characteristic parameters related to multiple positions in the space plane. The host selects a corresponding acoustic characteristic parameter in response to the position signal. According to the selected acoustic characteristic parameter, the host adjusts the audio signal. | 11-19-2009 |
| 20100027799 | ASYMMETRICAL DELAY AUDIO CROSSTALK CANCELLATION SYSTEMS, METHODS AND ELECTRONIC DEVICES INCLUDING THE SAME - Crosstalk cancellation systems for left and right channel stereo audio signals that are played over left and right stereo loudspeakers include circuitry that is configured to apply more crosstalk cancellation delay to a difference signal between the left and right stereo audio signals, than to a sum signal of the left and right channel stereo signals. The circuitry may be configured to apply no crosstalk cancellation delay to the sum signal. Related crosstalk cancellation methods and electronic devices incorporating same are also disclosed. | 02-04-2010 |
| 20100054485 | METHOD AND AN APPARATUS FOR PROCESSING AN AUDIO SIGNAL - A method for processing an audio signal is disclosed. The present invention includes obtaining a plural-channel audio signal including a speech component signal and other component signals, obtaining gain of the audio signal, obtaining modification strength parameter determining the strength of the modification of the speech component signal, modifying the gain based on the modification strength parameter, and modifying the speech component signal based on the modified gain. | 03-04-2010 |
| 20100119073 | METHOD AND AN APPARATUS FOR PROCESSING AN AUDIO SIGNAL - Disclosed is a method of processing an audio signal, including obtaining ratio information between a main signal and a sub-signal and gain range information of an object and modifying parameter information including at least one of an object parameter and a control parameter based on the ratio information and the gain range information. Disclosed is a method of processing an audio signal, including generating ratio information using object information, generating gain range information of an object using the ratio information, and modifying parameter information including at least one of an object parameter and a control parameter based on the gain range information. | 05-13-2010 |
| 20100124334 | AMPLIFICATION CIRCUIT AND AUDIO OUTPUT EQUIPMENT - An amplification circuit and an audio output equipment provided with same are disclosed. The amplification circuit is provided with first, second and third amplifiers and an inverter. The first amplifier amplifies a first audio signal and outputs a first output signal. The inverter inverts a second audio signal and outputs an inverted signal. The second amplifier amplifies the inverted signal and outputs a second output signal. The third amplifier outputs a reference voltage corresponding to a central voltage of the amplitude of the first and the second output signals. | 05-20-2010 |
| 20100150357 | AMPLIFIER CIRCUIT AND METHOD OF SIGNAL AMPLIFICATION - An amplifier circuit and a method of signal amplification are provided. The amplifier circuit includes a first amplifier and a charge pump. The first amplifier includes a first terminal, a second terminal, and a third terminal. The first terminal is coupled to a first external voltage. The second terminal is coupled to a negative voltage. The third terminal is coupled to a ground reference voltage. The charge pump is coupled to the first amplifier for providing the negative voltage transformed from a second external voltage. | 06-17-2010 |
| 20100158259 | DYNAMIC VOLUME CONTROL AND MULTI-SPATIAL PROCESSING PROTECTION - A disclosed system and method dynamically controls the perceived volume of a stereo audio program including left and right channel signals. The system comprises: a dynamic volume control configured and arranged so as to maintain a perceived constant volume level of the stereo audio program; and an excessive spatial processing protection processor configured and arranged for controlling the level of a difference signal, created as a function of the right channel signal subtracted from the left channel signal (L−R), relative to the level of a sum signal, created as a function of the right channel signal plus the left channel signal;; wherein the excessive spatial processing protection processor processes the audio signals so as to control the difference (L−R) signal relative to the sum (L+R) signal. A system and method are also provided for dynamically controlling the perceived volume of a stereo audio program including left and right channel signals, comprising: a dynamic volume control configured and arranged so as to maintain a perceived constant volume level of the stereo audio program; and a program change detector configured and arranged to provide a program change signal indicating that the volume of the left and right channel signals has dropped below a threshold level for at least a threshold time period so as to anticipate a possible change in the sound level of the left and right channel signals; wherein the dynamic volume control is responsive to the program change signal. | 06-24-2010 |
| 20100296657 | APPARATUS FOR SOUND HAVING MULTIPLES STEREO IMAGING - The present invention relates to an apparatus for sound comprises a sound source generating unit for generating an electric signal from a sound source; N (N≧2) amplifiers which are connected with the sound source generating unit; and 2N speakers which are respectively connected with left and right output parts of each of the N amplifiers, wherein there is formed a multiple stereo imaging including a first stereo imaging generated by two speakers which are respectively connected with the left and right output parts of one amplifier selected from the N amplifiers; a first mono imaging generated by N speakers which are connected with the left output parts of each of the N amplifiers; a second mono imaging which are connected with the right output parts of each of the N amplifiers; and a second stereo imaging generated by the first mono imaging and the second mono imaging. | 11-25-2010 |
| 20110123033 | SURGE PROTECTION CIRCUIT FOR AUDIO OUTPUT DEVICE - A surge protection circuit acquires a surge signal of a left channel (LC) signal line and a right channel (RC) signal line. After the surge signal transmitting on the LC signal line and the RC signal line are removed, an audio signal outputted from a signal input device are transmitted to an audio output device via the LC signal line and the RC signal line. | 05-26-2011 |
| 20110255698 | PROGRAMMABLE NOISE GATE FOR AUDIO AMPLIFIER EMPLOYING A COMBINATION OF LOW-NOISE AND NOISE-REJECTING ANALOG AND DIGITAL SIGNAL PROCESSING - An apparatus comprises a first signal circuit path, a noise gate circuit, and a control circuit. The first signal circuit path processes a first electrical signal that includes one or more signal frequencies in the audio frequency band. The first signal circuit path includes a first amplifier circuit configured to provide a first output signal to a speaker load. The noise gate circuit monitors the first electrical signal and generates a first indication when the amplitude of the first electrical signal decreases below a first specified threshold voltage value. The control circuit mutes an output of the first signal circuit path according to the generated indication. The apparatus is formed on a single integrated circuit. | 10-20-2011 |
| 20110280407 | Compressor Based Dynamic Bass Enhancement with EQ - A system for and method of enhancing the low frequency response of a loudspeaker for relatively low input level audio signals and protect the loudspeaker for relatively high input level audio signals is disclosed. The system comprises: a crossover network configured so separate an audio input signal into at least two frequency bands including a low frequency band; and a signal compressor responsive to the energy level of the low frequency portion of an input audio signal in the low frequency band and configured to provide amplification gain on the low frequency portion of the input signal when the energy level of the low frequency portion of the input signal is relatively low so as to enhance the low frequency response of the loudspeaker, and attenuation of the low frequency portion of the input signal when the energy level of the low frequency portion of the input signal is relatively high so as to protect the loudspeaker from being overdriven. The system is configurable so that it can be used to enhance the loudspeakers of audio and video play devices such as televisions and computers. | 11-17-2011 |
| 20110293100 | AUDIO AMPLIFIER PERFORMANCE WHILE MAINTAINING USB COMPLIANCE AND POWER DOWN PROTECTION - An apparatus comprises a first audio amplifier circuit configured to provide an analog audio signal and an analog switch circuit including a first input configured to receive the analog audio signal, a second input configured to receive a first digital data signal, and a first output configured to provide one of the digital data signal or the analog audio signal. The apparatus also includes a first feedback circuit coupled to the first audio amplifier circuit and the analog switch circuit output, the feedback circuit configured to bias the first audio amplifier circuit. | 12-01-2011 |
| 20110293101 | M-BRIDGE CLASS-D AUDIO AMPLIFIER - A M-bridge class-D audio amplifier for portable applications and a method of driving a three-wire audio output device comprises a stereo signal source producing first and second input stereo digital signals; circuitry adapted to receive the first and second input stereo digital signals and produce three stereo signals comprising a first, second, and third digital signal, wherein the three stereo signals generate PWM waves comprising a first, second, and third digital signal PWM wave; exactly three pairs of MOSFETs driven by the first, second, and third digital signal PWM waves respectively; and a three-wire speaker system comprising a first wire driven by the first digital signal PWM wave through the first pair of MOSFETs; a second wire driven by the second digital signal PWM wave through the second pair of MOSFETs; and a common wire driven by the third digital signal PWM wave through the third pair of MOSFETs. | 12-01-2011 |
| 20110305346 | Adaptive Audio Output - Devices, apparatus, methods, circuits and processors are implemented for control of audio signals. Consistent with one such apparatus, a processor circuit is configured and arranged to determine, for a perceived loudness algorithm that outputs audio signal levels, a common point corresponding to a particular background noise level at which the levels of the audio signal levels are independent of a volume setting that corresponds to desired perceived loudness, and to determine an audio signal level from the perceived loudness algorithm in response to a background noise signal, a volume setting signal, and the common point. An audio signal level output circuit is configured and arranged to provide an audio signal at the determined audio signal level. | 12-15-2011 |
| 20120020483 | SYSTEM AND METHOD FOR ROBUST AUDIO SPATIALIZATION USING FREQUENCY SEPARATION - Systems and devices for, and methods of, frequency separation and spatialization of audio content, by: (a) filtering a stream content; (b) transmitting the filtered stream content via a plurality of speaker channels, wherein at least one of the speaker channels of the plurality of speaker channels comprises an amplitude gain based on a display position set; and optionally (c) generating an inversion of the filtered stream content; and (d) combining the inverted filtered stream content with the stream content to generate a low frequency component of the audio content. | 01-26-2012 |
| 20120093325 | SWITCHING CIRCUIT AND ELECTRONIC DEVICE USING THE SAME - An electronic device includes an audio power amplifier used to output a left and a right channel audio signal, an earphone jack assembly, and a switching circuit automatically switching between a speaker mode and an earphone mode. The audio power amplifier includes a control pin enabling the audio power amplifier to be electrically connected to the speaker. The control pin activated at a low level and disabled at a high level. The switching circuit is capable of enabling the control pin to switch between the low level and the high level. The switching circuit includes a power supply, a first resistor, a second resistor, a third resistor, and a diode. The resistance of the third resistor far exceeds that of the first resistor. | 04-19-2012 |
| 20120106745 | AUDIO PROCESSING SYSTEM - The audio processing system disclosed in the invention comprises an audio processor and an audio amplifier. The audio processor receives a data signal to generate a processed signal, and comprises at least one gain control circuit and at least one operational amplifier. The gain control circuit generates a gain signal according to a volume control signal, a reference signal, and a feedback signal. The operational amplifier couples to the gain control circuit and amplifies the data signal by the gain signal to generate a processed signal. The audio amplifier couples to the audio processor to receive and amplify the processed signal, wherein an amplified signal is generated. | 05-03-2012 |
| 20120128164 | BINAURAL NOISE REDUCTION - In one embodiment, the present invention provides a sound processing device with a binaural input and binaural output, where “binaural input” means at least one microphone mounted in or near each ear of the device user, and “binaural output” means at least one output signal directed to each ear. The device may be comprised of two parts connected by a wired or wireless link. The device comprises: at least one microphone in or near each ear for the transduction of the sound at each ear; a signal-to-noise estimation module to estimate the signal-to-noise ratio present at each ear; a comparison and selection module to compare the signal-to-noise ratios present at the two ears and select the ear with the greater signal-to-noise ratio; a noise reduction control module that uses the spectral and temporal information from the selected ear signal to control two identical noise reduc tion modules; two identical noise reduction modules that process the signals from the two ears, under the control of the control module; and two output modules that amplify the output signals from the noise reduction modules appropriately for each ear and present the amplified signals as sound or other signals to each ear of the device user. The device may be implemented in dedicated hardware embodiment or by software running on a microprocessor. | 05-24-2012 |
| 20120155654 | CIRCUIT DEVICE FOR PROVIDING A THREE-DIMENSIONAL SOUND SYSTEM - A circuit device for a three-dimensional sound system is disclosed. The device circuit contains a plurality of resistors, capacitors and transistors. The circuit is an analog circuit creating an actual three-dimensional sound system where the listener can perceive sound coming from different spatial directions. The circuit device accomplishes this by sensing the amplitude and phase difference between the sound signals. | 06-21-2012 |
| 20130064378 | ANTI-NOISE EARMUFF DEVICE WITH BLUETOOTH MODULE AND AUDIO SIGNAL PROCESSOR - An anti-noise earmuff device includes an audio signal processor unit, a Bluetooth module, an audio mixer unit and an amplifier unit. The audio signal processor unit is arranged in the earmuffs for control audio signal output, protecting the user's eardrums against noise of high-decibel level. The Bluetooth module receives or communicates with a mobile communication device through an antenna, allowing the user to listen to the music and to communicate with people outside without needing taking off the earmuff device. | 03-14-2013 |
| 20130156203 | TERMINAL HAVING A PLURALITY OF SPEAKERS AND METHOD OF OPERATING THE SAME - A terminal including a plurality of speakers and a method for operating the same are provided. The method includes generating a request for an audio data playback, processing a signal according to the audio data playback, determining an audio pass which will output the processed signal corresponding to the audio data, when the audio pass which will output the processed signal corresponding to the audio data is determined, dividing an audio signal to be transferred to sub amplifiers in a front terminal of at least one dual amplifier connected to a plurality of speakers in one-to-on correspondence and including two sub amplifiers corresponding to a dual amplifier, transferring the divided audio signal to a corresponding sub amplifier of the dual amplifier, and amplifying the processed signal corresponding to the audio data and transferring the amplified processed signal corresponding to the audio data to the speakers by the dual amplifier. | 06-20-2013 |
| 20130216048 | STEREO TO MONAURAL MULTI-SPEAKER PARALLEL WIRING SYSTEM - The present invention is directed to a Stereo to Monaural Multi-speaker Parallel Wiring System that uses a standard 200 watt stereo and a whole sound impedance corrector to greatly reduce the wiring connections, the installation time and the overall cost of the system. A whole or complete sound comes from each speaker and will, overlap from speaker to speaker so that moving/around in different areas or zones within a house or yard, a person will receive the same whole and complete sound. With the master speaker switch box included, different areas or zones can be turned off or on as desired. | 08-22-2013 |
| 20130266146 | HEADSET SWITCHES WITH CROSSTALK REDUCTION - Techniques for utilizing a plurality of switches to reduce crosstalk in a headset jack for accommodating both European and North American type headset plugs. In an aspect, a six-switch solution is provided to selectively couple first and second terminals of the jack to a ground and a microphone terminal, and further to selectively couple a ground sensing input to the first or second terminal of the jack. The ground sensing input is provided to left and right audio channel amplifiers for driving the corresponding left and right terminals of the headset, to provide a common-mode reference level to the left and right audio channel amplifiers. In another aspect, at least four physical pins are provided to couple the switches to the ground and microphone terminals of the jack, and the connections between the ground sensing inputs and the jack may be provided adjacent to the jack for better isolation. | 10-10-2013 |
| 20130329893 | AUDIO OUTPUT APPARATUS AND METHOD FOR OUTPUTTING AUDIO - An audio output apparatus and a method for outputting audio are provided. The audio output apparatus includes a receiver which receives a multi-channel audio signal that includes channels; an amplifier which amplifies the received multi-channel audio signal for each channel; and an audio output which includes speakers that output the channels of the amplified multi-channel audio signal, respectively. | 12-12-2013 |
| 20140064497 | AMPLIFIER UNIT AND MOBILE ELECTRONIC DEVICE PROVIDED WITH THE AMPLIFIER UNIT - An amplifier unit suitable for a wide variety of uses, which can flexibly support diverse sound recording scenarios, and a mobile electronic device provided with the amplifier unit. An amplifier unit has microphone/line input terminals respectively provided on the topside surface and the left side surface. When a connector is connected to a mobile electronic device, stereophonic sound is recorded using one of the terminals when the mobile electronic device is held in portrait orientation, and using the other terminal when the mobile electronic device is held in landscape orientation. It is possible to switch each of audio signals coming through the two terminals between monophonic and stereophonic. | 03-06-2014 |
| 20140064498 | SOUND SYSTEM AND METHOD FOR CAPTURING AND REPRODUCING SOUNDS ORIGINATING FROM A PLURALITY OF SOUND SOURCES - A sound system and method for capturing and reproducing sounds produced by a plurality of sound sources are disclosed. Sounds produced by the plurality of sound sources may be received and converted separately to separate audio signals without mixing the audio signals. The audio signals may be separately stored on a recording medium without mixing the audio signals. Such audio signals may be read from the recording medium and separately amplified using an amplification network of amplifiers. Loudspeakers in a loudspeaker network may be used to separately reproduce the sounds from the amplified audio signals. Components within a signal path may be dynamically controlled by a controller. The amplifiers and/or loudspeakers for each signal path may be customized based on the characteristics and complexities of the original sound to be reproduced on each signal path. | 03-06-2014 |
| 20140192989 | PROGRAMMABLY CONFIGURED SWITCHMODE AUDIO AMPLIFIER - A multi-channel switchmode audio amplifier is configured by a programmed processor such that each channel drives separate loads, is connected in parallel or is configured in a bridge-tied mode as well as combinations thereof. In one embodiment, amplifier channels that are connected in parallel have power amplifiers that are driven with signals from a single modulator. A feedback circuit and error amplifier from one channel controls the modulated signal that is applied to each parallely connected amplifier channel. Current feedback circuits for parallely connected amplifier channels are eliminated by tightly controlling the timing of switching in the power amplifier output stages. | 07-10-2014 |
| 20140254803 | RFID TRANSCEIVER FOR REMOTE CONTROL - A transceiver for remote control, the transceiver includes an amplifier configured to receive an audio signal from a first electronic device and amplify the audio signal; a transmission module electrically connected to the amplifier to receive the amplified audio signal and generating a first carrier signal; a power supply connected to the transmission module; and a receiver module connected to the first electronic device and the power supply, wherein the amplified audio signal is configured to modulate the first carrier signal generated by the transmission module, and the audio signal is one of a left channel audio signal and a right channel audio signal from the first electronic device. | 09-11-2014 |
| 20150326986 | Pair Volume Control - An example method includes, based on an adjustment to a first displayed volume control, instructing the first playback device to adjust playback volume level; based on an adjustment to a second displayed volume control, instructing the second playback device to adjust playback volume level; after sending the commands, instructing the first and/or second playback device to process an audio stream into a first and/or second channel and to reproduce a respective one of the first and second channel, wherein the grouped first and second playback devices provide multi-channel sound; and based on an adjustment to a third displayed volume control, instructing the first and/or second playback device to adjust a group volume level for both the first and second playback devices. | 11-12-2015 |
| 20150326989 | DEVICE FOR MATCHING AND INDENTIFYING AUDIO INTERFACE OF MOBILE TERMINAL AND ELECTRONIC SIGNATURE TOKEN - A device for matching and identifying an audio interface of a mobile terminal and an electronic signature token are provided. The audio interface of the mobile terminal includes a first pin, a second pin and a third pin, the first pin is one of a microphone pin and a ground pin, the second pin is the other one of the microphone pin and the ground pin. The third pin is connected with the first and second pins via a switching module. When the switching module connects the third pin and the first pin to form a first loop, an impedance of the first loop is matched with an identification resistance of the mobile terminal. When the switching module connects the third pin and the second pin to form a second loop, an impedance of the second loop is matched with the identification resistance of the mobile terminal. | 11-12-2015 |
| 20150382109 | DIGITAL AMPLIFIER, THREE-VALUE SIGNAL OUTPUT METHOD AND SPEAKER - Noise is reduced when three-value output is performed. In a digital amplifier | 12-31-2015 |
