Did You Know...
...that in the early 1940s GE engineer James Wright was charged with a task of utmost importance to the war effort: develop a cheap substitute for rubber that could be used to produce tires, gas masks and a whole host of military gear. Wright tackled the task diligently -- and wound up inventing Silly Putty.
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| Number | Title | Issue Date |
| 8189812 | Bass boost filtering techniques Bass frequencies of audio can be boosted using various techniques and tools. The described techniques and tools can be applied separately or in combination. For example, bass frequencies of audio can be boosted using an integer bass boost filter by receiving user-se... | 05/29/2012 |
| 8180071 | Pseudo deep bass generating device A multiplier 3 multiplies a square wave signal A(ω,t) by a low frequency component signal L(ω,t) to generate an even-order harmonic component signal B(ω,t). A multiplier 4 multiplies the even-order harmonic component signal B(ω,t) by the low freque... | 05/15/2012 |
| 8175292 | Audio signal processing A method for processing and transducing audio signals. An audio system has a first audio signal and a second audio signal that have amplitudes. A method for processing the audio signals includes dividing the first audio signal into a first spectral band signal and a... | 05/08/2012 |
| 8170236 | Pitch detection apparatus and method Band-pass filter suppresses frequency components of a sound signal that are lower than a low-side cutoff frequency and that are higher than a high-side cutoff frequency. Pitch detection section detects a pitch of the sound signal having been processed by the band-pa... | 05/01/2012 |
| 8170235 | Hearing apparatus with unsymmetrical tone balance unit and corresponding control method For hearing apparatus and especially for hearing devices a tone balance unit is to be able to be used even under difficult general conditions. Therefore a hearing apparatus with a signal processing device, through which signals are able to be processed in a number o... | 05/01/2012 |
| 8160274 | System and method for digital signal processing The present invention provides for methods and systems for digitally processing an audio signal. Specifically, the present invention provides for a headliner speaker system that is configured to digitally process an audio signal in a manner such that studio-quality ... | 04/17/2012 |
| 8150065 | System and method for processing an audio signal Systems and methods for audio signal processing are provided. In exemplary embodiments, a filter cascade of complex-valued filters are used to decompose an input audio signal into a plurality of frequency components or sub-band signals. These sub-band signals may be... | 04/03/2012 |
| 8150066 | Sound signal processing device, sound signal processing method, sound signal processing program, storage medium, and display device A sound signal processing device causes an amplifier to amplify a low frequency signal and synthesizes the amplified low frequency signal with a middle or high frequency signal so as to output the resultant output signal. A gain control section controls a gain of th... | 04/03/2012 |
| 8150067 | Bass enhancing method, signal processing device, and audio reproducing system If the absolute value of the current sample is greater than or equal to an envelope value at the immediately preceding sample, an envelope value at the current sample is made greater than the envelope value at the immediately preceding sample. If the absolute value ... | 04/03/2012 |
| 8126163 | Volume and tone control in direct digital speakers A system that includes a direct digital speaker volume control device configured to be coupled to a direct digital speaker. The direct digital speaker includes many pressure producing elements being adapted to generate a sound at a sound pressure level (SPL) and at ... | 02/28/2012 |
| 8077880 | Combined multirate-based and fir-based filtering technique for room acoustic equalization A combined multirate-based Finite Impulse Response (FIR) filter equalization technique combines a low-order FIR equalization filter operating at a lower rate for equalization of a loudspeaker-room response at low frequencies, and a complementary low-order minimum-ph... | 12/13/2011 |
| 8059833 | Method of compensating audio frequency response characteristics in real-time and a sound system using the same A method of compensating audio frequency response characteristics of a portable sound system can be performed using acoustic characteristics of a user measured in real-time. The method of compensating the audio frequency response characteristics can be used by a por... | 11/15/2011 |
| 8050425 | Audio signal supplying device, parameter providing system, television set, AV system, speaker apparatus, and audio signal supplying method An audio signal supplying device includes a connection terminal which is connected to a speaker unit and which outputs an audio signal to the speaker unit, a specifying section which specifies a type of the speaker unit connected to the connection terminal, an acqui... | 11/01/2011 |
| 8023665 | Microphone-tailored equalizing system A method and system is described to improve the reproduction of sound of an acoustic musical instrument. According to one embodiment, a first microphone is placed at a proximate location to the musical instrument to pick up the sound of the musical instrument. The s... | 09/20/2011 |
| 7986797 | Signal processing system, signal processing apparatus and method, recording medium, and program A signal processing system, a signal processing apparatus and method, a recording medium, and a program in which high frequency components of a narrow-range signal having suppressed high frequency components can be restored with high accuracy. A narrow-range audio s... | 07/26/2011 |
| 7986796 | Apparatus to generate multi-channel audio signals and method thereof An apparatus and method of generating multi-channel audio signals includes a voice signal removal unit to generate a first signal by removing one or more components of a plurality of frequency bands corresponding to a voice frequency range from an input signal, a vo... | 07/26/2011 |
| 7974420 | Mixed audio separation apparatus A mixed audio separation system (100) which separates a specific audio from among a mixed audio (S100) includes a local frequency information generation unit (105) which obtains pieces of local frequency information (S103) corresponding t... | 07/05/2011 |
| 7965852 | Audio signal processing method and apparatus In case of carrying out a correction process with respect to a signal of a specific frequency band in an inputted audio signal, an output level is raised approximately uniformly with respect to a signal component equal to a predetermined level or less in the signal ... | 06/21/2011 |
| 7957545 | Stereo speaker system having acoustic filter for improving low frequency characteristic A stereo speaker system including: a speaker unit having a plurality of speakers which output audio; and a filter unit selectively receiving low frequency components of the outputted audio. The filter unit eliminates the received low frequency components to decrease... | 06/07/2011 |
| 7940941 | Effect adding method and effect adding apparatus An effect adding method, includes: applying different gains to a positive side waveform portion and a negative side waveform portion of an audio signal respectively when absolute values of input levels of the positive side waveform portion and the negative side wave... | 05/10/2011 |
| 7907738 | Speaker equalization tool A computer readable medium containing program instructions for controlling a parametric equalizer is provided. Generally, a computer readable code is provided for displaying a composite equalization curve, wherein the composite equalization curve is formed from at l... | 03/15/2011 |
| 7787640 | System and method for spectral enhancement employing compression and expansion A spectral enhancement system is disclosed that includes an input node for receiving an input signal, at least one broad band pass filter coupled to the input node and having a first band pass range, at least one non-linear circuit coupled to the filter for non-line... | 08/31/2010 |
| 7720237 | Phase equalization for multi-channel loudspeaker-room responses A system and method for minimizing the complex phase interaction between non-coincident subwoofer and satellite speakers for improved magnitude response control in a cross-over region. An all-pass filter is cascaded with bass-management filters in at least one filte... | 05/18/2010 |
| 7715573 | Audio bandwidth expansion Bandwidth expansion for audio signals by frequency band translations plus adaptive gains to create higher frequencies; use of a common channel for both stereo channels limits computational complexity. Adaptive cut-off frequency determination by power spectrum curve ... | 05/11/2010 |
| 7711129 | Method and system for approximating graphic equalizers using dynamic filter order reduction Improved approaches to flexibly implementing graphic equalizers on media players are disclosed. These approaches provide dynamic order reduction of a multi-band graphic equalizer so that equalizer effects can be timely performed with only limited computational resou... | 05/04/2010 |
| 7668319 | Signal processing system, signal processing apparatus and method, recording medium, and program The present invention relates to a signal processing system, a signal processing apparatus and method, a recording medium, and a program in which high frequency components of a narrow-range signal having suppressed high frequency components can be restored with high... | 02/23/2010 |
| 7574009 | Method and apparatus for controlling the reproduction in audio signals in electroacoustic converters The aim of the invention is to control the bass reproduction of audio signals in electroacoustic transducers based on the psychoacoustic principle denoted by the term “virtual pitch” or “residual hearing (hearing of missing fundamental)”, in such a way that ... | 08/11/2009 |
| 7519187 | Array speaker system Input audio signals are divided into low-frequency components and high-frequency components, both of which are subjected to delay processing in correspondence with desired positions of focal points with respect to speaker units respectively. Delayed low-frequency co... | 04/14/2009 |
| 7460678 | Digital audio processor The present invention is related to a method for adjusting the frequency characteristic of a digital audio processor having adjustable parameters including at least low frequency gain, high frequency gain and volume gain. The invention is also related to an audio de... | 12/02/2008 |
| 7440576 | Apparatus and method for reconstructing high frequency part of signal Provided is an apparatus and method for reconstructing the high frequency part of audio signal to improve the quality of the audio signal. The apparatus includes a frequency inverter which inverts the frequency of an input signal; a band-pass filter which filters th... | 10/21/2008 |
| 7430296 | Circuit arrangement for reducing the dynamic range of audio signals An audio system includes a first transformation device provided with an input audio signal and which transforms the input audio signal from the time domain to the frequency domain resulting in an input spectrum. The system also includes a spectral processing device,... | 09/30/2008 |
| 7428308 | Transmitting and reproducing stereophonic audio signals Apparatus and method for transmitting and reproducing stereophonic audio signals are disclosed. The method comprises splitting first and second channels into two frequency bands, combining the lower frequency band signals of the two channels, and transmitting the co... | 09/23/2008 |
| 7415118 | System and method for distributed gain control In accordance with an embodiment, the invention provides a spectral enhancement system that includes a plurality of distributed filters, a plurality of energy distribution units, and a weighted-averaging unit. At least one of the distributed filters receives a multi... | 08/19/2008 |
| 7412220 | Signal processing Signal processing apparatus produces an audio signal suitable for conveying a psychoacoustic perception of a low frequency audio signal to a listener, the apparatus generates harmonics of the low frequency signal by shaping the waveform of the low frequency signal w... | 08/12/2008 |
| 7409066 | Method of adjusting filter parameters and an associated playback system To improve upon a method of adjusting at least one filter parameter such as the mid-frequency of at least one filter unit provided with a playback system for audio signals, this filter unit being provided in particular for at least one digital equalizer assigned to ... | 08/05/2008 |
| 7409067 | Method and apparatus for adjusting frequency characteristic of signal In a frequency characteristic adjustment apparatus incorporated in an audio system, a frequency characteristic of an audio signal is made to agree with a target frequency characteristic, thus providing an equalizing function. In the apparatus, by a frequency charact... | 08/05/2008 |
| 7400735 | Wave-filtering device with an adjustable frequency bandwidth The present invention relates to a wave-filtering device with an adjustable frequency bandwidth installed in an output unit of an integrated system. The wave-filtering device is used for receiving a first output signal comprising an alternating current signal and a ... | 07/15/2008 |
| 7392880 | Dual range horn with acoustic crossover A new approach has been developed to combine mid-range and high frequency sound into the throat of a horn designed for sound reinforcement. An acoustic low pass filter element is interposed between the lower frequency passage and the higher frequency passage, so tha... | 07/01/2008 |
| 7394908 | Apparatus and method for generating harmonics in an audio signal An audio-signal-processing apparatus includes a band-decomposition unit utilizing a band-decomposition characteristic based on the harmonic-tone composition of musical instruments. A low interval limit generates the harmonic-tone to each band signal after decomposin... | 07/01/2008 |
| 7391869 | Base management systems Sound processing systems have been developed that create a surround effect without quality degradation experienced by known sound processing systems in non-optimum listening environments. The sound processing systems may include matrix decoding systems that manipula... | 06/24/2008 |
