Class / Patent application number | Description | Number of patent applications / Date published |
381099000 | Having crossover filter | 40 |
20080232612 | System for Audio Signal Processing - A sound reproduction system comprising a digital audio signal input ( | 09-25-2008 |
20080285775 | SOUND TUNING METHOD - The invention relates to a method for automated tuning of a sound system, the sound system comprising delay lines, equalizing filters, and at least two loudspeakers, the method comprising the steps of reproducing a useful sound signal through the loudspeakers, measuring sound pressure values at least one location, providing a target transfer function for tuning the delay lines and the equalizing filters of the sound system, the target transfer function representing a desired transfer characteristics of the sound system, adjusting the delay of the delay lines, and adjusting amplitude responses of the equalizing filters such, that the actual transfer characteristics of the sound system approximates the target function. | 11-20-2008 |
20090245535 | Loudspeaker Apparatus for Radiating Acoustic Waves in a Hemisphere - Loudspeaker apparatus comprise commonly some sort of casings or assemblies, in which one or more single speakers are integrated and which are used to convert electrical signals into sound. A loudspeaker apparatus | 10-01-2009 |
20090290724 | LOUDSPEAKER SYSTEM AND LOUDSPEAKER HAVING A TWEETER ARRAY - A loudspeaker system includes at least two stand-alone loudspeaker devices ( | 11-26-2009 |
20090316930 | WIDE-BAND EQUALIZATION SYSTEM - A Wide-band Equalization System (“WBES”) based on near- and far-field measurement data. The WBES includes a subwoofer equalizer having an FIR filter together with decimator and interpolator filters for processing low frequency signals. The WBES may also include satellite channels for processing mid- and high-frequency signals, where each satellite channel includes cascaded IIR filters that process mid-frequency and high-frequency signals, respectively. The WBES may also include a DSP that performs the functions required by the IIR and FIR filters. | 12-24-2009 |
20100067716 | Signal Processing Device, Signal Processing Method, and Sound Emitting System - A signal processing device for supplying sound signals to a first speaker for emitting a sound on a low-pitched sound side and a second speaker for emitting a sound on a high-pitched sound side higher than the low-pitched sound side, includes a control portion that controls a characteristic of the sound signal supplied to the first speaker so that an output level of the first speaker is maintained at a crossover frequency between the first speaker and the second speaker, when an output level of the sound signal supplied to the first speaker is changed. | 03-18-2010 |
20100166220 | BAND DIVISION APPARATUS - A band division apparatus obtains an analog low-band signal, an analog intermediate-band signal and an analog high-band signal from a digital sound signal. In the band division apparatus, a digital filter separates the digital sound signal into a digital intermediate-band signal having the intermediate frequency band while the high frequency band and the low frequency band are attenuated, and a digital low-high-band signal having a frequency band combining the low frequency band and the high frequency band while the intermediate frequency band are attenuated. A DA converter converts the digital low-high-band signal into an analog low-high-band signal. Another DA converter converts the digital intermediate-band signal into the analog intermediate-band signal. An analog filter separates the analog low-high-band signal into the analog low-band signal and the analog high-band signal. | 07-01-2010 |
20100226508 | DEVICE AND METHOD FOR ADAPTING AN AUDIO SIGNAL TO A TRANSDUCER UNIT | 09-09-2010 |
20100246853 | Audio Signal Processing Apparatus and Speaker Apparatus - An audio signal processing apparatus includes: a first filtering unit which outputs an audio signal while attenuating frequency components except for preset frequency components; a detecting unit which detects a sound volume level; an amplitude limiting unit which calculates an amplitude limiting level corresponding to the sound volume level, and which limits a part of a waveform of the audio signal output from the first filtering unit; a second filtering unit which outputs the audio signal output from the amplitude limiting unit while attenuating frequency components except for preset frequency components including a part of the frequency band of the audio signal output from the first filtering unit, and a part of the frequency band of the harmonics; a compressing unit which compresses a dynamic range of the audio signal; and an adding unit which adds the audio signal output from the compressing unit to the input audio signal. | 09-30-2010 |
20100290643 | EFFICIENCY OPTIMIZED AUDIO SYSTEM - An automated audio tuning system may optimize an audio system for power efficiency when performing automated tuning of the audio system to optimize acoustic performance. The system may establish any number of different power efficiency weighting factors to provide a balance between acoustic performance and power efficiency during operation. The power efficiency weighting factors may range from representing optimizing power efficiency with constrained optimization of acoustic performance to optimized acoustic performance with minimized regard for power efficiency. For each of the efficiency weighting factors, the system may generate operational parameters, such as filter parameters, to achieve a target acoustic response while maintaining a determined level of power efficiency. | 11-18-2010 |
20100310092 | CROSS-OVER FREQUENCY SELECTION AND OPTIMIZATION OF RESPONSE AROUND CROSS-OVER - A system and method provide at least a single stage optimization process which maximizes the flatness of the net subwoofer and satellite speaker response in and around a cross-over region. A first stage determines an optimal cross-over frequency by minimizing an objective function in a region around the cross-over frequency. Such objective function measures the variation of the magnitude response in the cross-over region. An optional second stage applies all-pass filtering to reduce incoherent addition of signals from different speakers in the cross-over region. The all-pass filters are preferably included in signal processing for the satellite speakers, and provide a frequency dependent phase adjustment to reduce incoherency between the center and left and right speakers and the subwoofer. The all-pass filters are derived using a recursive adaptive algorithm. | 12-09-2010 |
20110058687 | Apparatus - An apparatus comprising at least one processor and at least one memory including computer program code the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform: filtering an audio signal into at least three frequency band signals; generating for each frequency band signal a plurality of sub-band signals; processing at least one sub-band signal from at least one frequency band; and combining the processed sub-band signals to form a combined processed audio signal. | 03-10-2011 |
20110110533 | MULTIBAND DRC SYSTEM AND METHOD FOR CONTROLLING THE SAME - A multiband DRC system and a method for controlling the same are disclosed. In accordance with the present invention, the system and the method are capable of increasing an overall loudness of an output signal by controlling thresholds and gains of plurality of DRCs included in the multiband DRC system according to frequency bands. | 05-12-2011 |
20110182440 | Woofer-less and enclosure-less loudspeaker system - A woofer-less and box-less loudspeaker system including a plurality of tweeter drivers is provided. The speaker system includes a plurality of drivers, each driver including a front face and a rear face with an axis of symmetry, each driver configured for propagating sound energy along the axis of each driver from the front face, wherein the sound energy includes low frequency and high frequency components; and a support structure for arranging the plurality of drivers in such a way that the axis extending from the rear face of each of the drivers converge in a single point in space, wherein as the sound is propagated along the axis of each driver from the front face, the high frequency components from each driver are evenly spaced and the low frequency components from each driver are reinforced by the low frequency components of adjacent drivers. | 07-28-2011 |
20110293112 | DUAL HIGH FREQUENCY DRIVER CANALPHONE SYSTEM - A canalphone system may include a canalphone housing, and a first high frequency driver carried within the canalphone housing. The system may also include a second high frequency driver carried within the canalphone housing where the second high frequency driver is tuned with the first high frequency driver to deliver lower distortion than a standard canalphone high frequency driver and/or lower distortion than two standard canalphone high frequency drivers that are not tuned with each other. | 12-01-2011 |
20120213386 | AUDIO CROSSOVER SYSTEM AND METHOD - An audio crossover system and method is disclosed. An audio system includes two driver circuits, one for each of two audio frequency ranges, e.g., high and low frequency ranges. The driver circuits are designed to provide a combined frequency response curve that has a pronounced midrange attenuation dip, in contrast to prior art designs that attempt to provide a flat response over all frequency ranges. | 08-23-2012 |
20120243709 | INTEGRATED AUDIO VIDEO SIGNAL PROCESSING SYSTEM USING CENTRALIZED PROCESSING OF SIGNALS - Integrated processing of audio/video signals can eliminate unnecessary signal processors and converters without losing the functionality of typical home entertainment system components. The integrated system includes a main player that captures and processes signals digitally, a dummy display, and a dummy speaker. The dummy display may only have a display panel and a panel driver. The dummy speaker may only have a driving unit and no crossover logic. The main player may have a PC architecture and process all signals digitally for outputting signals tailored for the display device and the individual driving units of the dummy speaker. The integrated system may also provide dynamic signal adjustments based on the surrounding environment. The main player may include a storage device and can process media content stored therein to produce supplemental information to provide an optimal audiovisual experience. This supplemental information can be shared among users over a network connection. | 09-27-2012 |
20130182869 | ORTHOGONAL ERGONOMIC SPEAKER - A system and method for an audio system with two or more speakers, drivers, sources and the like is presented. An audio system includes a first speaker that reproduces sounds in a first frequency range and a second speaker that reproduces sounds in second frequency range. A crossover frequency is formed between the first frequency range and the second frequency range. The first speaker and the second speaker are physically separated by more than one wavelength of the crossover frequency and the first speaker is arranged horizontal with respect to the second speaker. | 07-18-2013 |
20130182870 | CROSS PRODUCT ENHANCED SUBBAND BLOCK BASED HARMONIC TRANSPOSITION - The invention provides an efficient implementation of cross-product enhanced high-frequency reconstruction (HFR), wherein a new component at frequency QΩ+Ω | 07-18-2013 |
20130188807 | Apparatus, Method and Computer Program for Controlling an Acoustic Signal - An apparatus comprising: at least one filter configured to filter an electrical input signal and provide a filtered electrical input signal to at least one speaker module configured to convert the filtered electrical input signal to an acoustic signal; and a detector configured to receive the filtered electrical input signal as a first input and an electrical output signal provided by at least one microphone as a second input; wherein the detector is configured to determine at least one difference between the electrical output signal provided by the at least one microphone and the filtered electrical input signal provided to said speaker module and, in response to the at least one difference provide a control signal to the filter to control the filter. | 07-25-2013 |
20140023207 | Passive Loudspeaker Multiplexer - A passive loudspeaker multiplexer ( | 01-23-2014 |
20140093096 | Crossover Frequency Adjustments for Audio Speakers - Methods and systems are provided for adjusting a crossover frequency between a plurality of audio speakers rendering audio content. In one example, a first subset of a plurality of audio speakers may be rendering a first sub-range of a range of audio frequencies of an audio content, and a second subset of speakers of the plurality of audio speakers may be rendering a second sub-range of the range of audio frequencies. In this example, the first sub-range and the second sub-range may be substantially separated at the crossover frequency. In one case, a playback volume at which the audio content is being rendered may be adjusted. In one instance, the crossover frequency may be adjusted in response to the volume adjustment to improve the audio content rendering quality by the respective subsets of audio speakers in the plurality of audio speakers. | 04-03-2014 |
20140177871 | SYSTEMS AND METHODS OF FREQUENCY RESPONSE CORRECTION FOR CONSUMER ELECTRONIC DEVICES - Frequency response correction systems and methods for consumer electronic (CE) devices are disclosed. Applying one or more of disclosed techniques can improve a consumer's listening experience. The frequency response of a CE device can be corrected to remove or attenuate salient, undesirable features of with minimal user interaction. Audio quality can be tuned for optimal or near optimal performance even at maximum or near maximum volume levels substantially without fluctuations, clipping, or any other distortions. In some embodiments, audio response of the CE device can be captured, smoothed, and corrected. Correction parameters can be stored on the CE device. | 06-26-2014 |
20150023525 | DUAL HIGH AND LOW FREQUENCY DRIVER CANALPHONE SYSTEM - A canalphone system may include a canalphone housing, and a first high frequency driver carried within the canalphone housing. The system may also include a second high frequency driver carried within the canalphone housing where the second high frequency driver is tuned with the first high frequency driver to deliver lower distortion than a standard canalphone high frequency driver and/or lower distortion than two standard canalphone high frequency drivers that are not tuned with each other. | 01-22-2015 |
20150350784 | MUSIC ADAPTIVE SPEAKER SYSTEM AND METHOD - A music adaptive speaker system and method. A musical electrical signal is separated into at least two components for input, respectively, to at least two loudspeaker drivers using at least one signal-separating cross-over point having a controllable frequency or frequency range. A music-adaptive cross-over point is identified for the musical electrical signal, and the frequency or frequency range of the signal-separating cross-over point is controlled based at least in part on the music-adaptive cross-over point. | 12-03-2015 |
20160004311 | Control Apparatus for a Tactile Audio Display - An apparatus comprising: an input configured to receive at feast one signal comprising a haptic signal part and an audio signal part; a stream processor configured to separate the at least one signal to generate at least one haptic signal and at least one audio signal; a router configured to route the at least one haptic signal as a first output signal to a first output and the at least one audio signal as a second output signal to a second output; and an output configured to output the processed first output signal such that it generates a haptic effect and the processed second output signal generates an acoustic effect. | 01-07-2016 |
20160006406 | CROSS PRODUCT ENHANCED SUBBAND BLOCK BASED HARMONIC TRANSPOSITION - The invention provides an efficient implementation of cross-product enhanced high-frequency reconstruction (HFR), wherein a new component at frequency QΩ+rΩ | 01-07-2016 |
20160019878 | AUDIO SIGNAL PROCESSING METHODS AND SYSTEMS - Described are methods and systems of identifying one or more fundamental frequency component(s) of an audio signal. The methods and systems may include any one or more of an audio event receiving step, a signal discretization step, a masking step, and/or a transcription step. | 01-21-2016 |
20160066094 | Audio Output Balancing - An example implementation involves a first playback device receiving audio content to be played by the first playback device and a second playback device. The first playback device may be configured to play respective portions of the audio that are respectively below and above a first crossover frequency. The playback device determines a first limiting result that represents playback of the second portion of the audio content by applying, to the second portion of the audio content, a pre-determined volume-limiting function that is associated with the second playback device, where the first limiting result indicates frequencies at which a playback volume of the second playback device is limited. The playback device determines a second crossover frequency based on the indicated frequencies at which the playback volume of the second playback device is limited and plays a third portion of the audio content that is below the second crossover frequency. | 03-03-2016 |
20160105742 | SIGNAL PROCESSOR - One example discloses a signal processor, including: a signal input having an input bandwidth; a first transducer output; a second transducer output; a filter network coupled to the signal input, the first transducer output and the second transducer output; wherein the filter network is configured to output a first portion of the input bandwidth on the first transducer output and a second portion of the input bandwidth on the second transducer output; and a control module coupled to the filter network and configured to adjust the first and second portions of the input bandwidth in response to signal degradation on the first transducer output. | 04-14-2016 |
20160127830 | SELF-POWERED AUDIO SPEAKER HAVING SOCKET FOR AUDIO DATA RECEIVER - Embodiments of the invention include a speaker system having the ability to accommodate one or more transmission protocols as well as multiple upgrade paths. One or more replaceable cards sit in a socket or bus system. The cards may include one or more components for receiving a wireless audio signal and decoding the signal. Other cards may include circuits for converting the digital audio signals into analog audio signals. Yet other cards, or other components on cards, may include circuitry for filtering or modifying the audio signals. In some embodiments the main components of the cards may be formed in a re-programmable device that can be updated by a user. In conjunction, these components create a powered speaker system that is constantly upgradable as various data transmission standards and audio filtering standards mature. | 05-05-2016 |
20160171985 | SYSTEM AND METHOD FOR DYNAMIC EQUALIZATION OF AUDIO DATA | 06-16-2016 |
381100000 | With active device | 8 |
20120134510 | WATERMARK GENERATING METHOD, BROADCAST CONTENTGENERATING METHOD INCLUDING THE SAME AND WATERMARKING SYSTEM - Disclosed are a method of generating a watermark, a method of generating a broadcast content including the same, and a watermarking system. The method of generating a watermark according to an exemplary embodiment of the present disclosure includes: determining a size of a target image to which a broadcast content is provided; determining the number of watermarks to be inserted into one frame of the target image; generating a watermark insert pattern by using the size of the target image and the number of watermarks; and scaling up the watermark insert pattern to a predetermined pattern for inserting the watermark insert pattern into an original image of the broadcast content. | 05-31-2012 |
20120170769 | Adjusting the Loudness of an Audio Signal with Perceived Spectral Balance Preservation - The loudness of an audio signal is adjusted while reducing changes in its perceived spectral balance, using a dynamically-controllable filter having a high-frequency response characteristic and a low-frequency response characteristic, controlled by dynamically-changing information on the desired gain in each of a plurality of frequency bands of the audio signal. | 07-05-2012 |
20150381782 | HANDPHONE - A handphone is configured to receive a first audio signal of a telecommunication conversation from a telecommunication device and send a second audio signal of the telecommunication conversation to the telecommunication device. A modulated ultrasound frequency audio signal that is directional is created from the first audio signal of the telecommunication conversation. The modulated ultrasound frequency audio signal is output via a loudspeaker. A direction of the modulated ultrasound frequency audio signal is controlled by a physical object and a location of the loudspeaker. | 12-31-2015 |
20160044404 | SPEAKER APPARATUS - A speaker apparatus including: a speaker cabinet in which an opening is formed in a front side; a speaker driver installed frontward in the opening of the speaker cabinet; and a duct part having a labyrinth structure that guides radiating acoustic energy of the speaker driver to a front duct hole formed in the front side of the speaker cabinet and a rear duct hole formed in a rear side of the speaker cabinet. | 02-11-2016 |
20160112022 | AUTOMATIC SOUND EQUALIZATION DEVICE - A technique for determining one or more equalization parameters includes acquiring, via one or more electrodes, auditory brainstem response (ABR) data associated with a first audio sample and determining, via a processor, one or more equalization parameters based on the ABR data. The technique further includes reproducing a second audio sample based on the one or more equalization parameters, acquiring, via the one or more electrodes, complex auditory brainstem response (cABR) data associated with the second audio sample, and comparing, via the processor, the cABR data to at least one representation of the second audio sample to determine at least one measure of similarity. The technique further includes modifying the one or more equalization parameters based on the at least one measure of similarity. | 04-21-2016 |
20160118056 | METHOD AND DEVICE FOR ENCODING AND DECODING AUDIO SIGNAL - A method is provided. The method includes obtaining a low-band spectrum of an audio signal in which a low-band signal is frequency transformed; obtaining phase information of a high-band spectrum of the audio signal based on the low-band spectrum; and outputting a bitstream that comprises the phase information of the high-band spectrum. | 04-28-2016 |
20160173047 | AUDIO ENHANCEMENT VIA BEAMFORMING AND MULTICHANNEL FILTERING OF AN INPUT AUDIO SIGNAL | 06-16-2016 |
20160205471 | DIGITAL/ANALOGUE CONVERSION APPARATUS | 07-14-2016 |