Patent application number | Description | Published |
20080232606 | SYNCHRONOUS DETECTION AND CALIBRATION SYSTEM AND METHOD FOR DIFFERENTIAL ACOUSTIC SENSORS - A synchronous detection and calibration system is provided for expedient calibration of differential acoustic sensors in a manufacturing and testing environment. By processing a series of sequentially received tones, respective portions of a system using differential acoustic sensors are tuned for optimum individual operation, following which corresponding control data are generated and stored for use in selecting among predetermined calibration vectors which establish and maintain optimum system operation. | 09-25-2008 |
20110012662 | SUB-BEAM FORMING TRANSMITTER CIRCUITRY FOR ULTRASOUND SYSTEM - Multi-channel pulser driver circuitry for a sub-beam forming transmitter of an ultrasound system in which sub-beam signals are formed by delaying sub-beam pulse pattern data in accordance with sub-beam pulse delay data and multiple clock signals. | 01-20-2011 |
20110013488 | SUB-BEAM FORMING RECEIVER CIRCUITRY FOR ULTRASOUND SYSTEM - Multi-channel receiver circuitry for a sub-beam forming receiver of an ultrasound system in which digital filtering, down-sampling and successive data storage circuitry impose programmable fine and coarse time delays on received digital data signals. | 01-20-2011 |
20110051937 | BEAM FORMING IN SPATIALIZED AUDIO SOUND SYSTEMS USING DISTRIBUTED ARRAY FILTERS - A system includes multiple speakers arranged in a speaker array configuration. The system also includes one or more filters configured to filter audio signals and generate filtered audio signals. The one or more filters are configured to operate using filter coefficients associated with a desired beam pattern to be produced by the multiple speakers. The system further includes at least one amplifier configured to amplify the filtered audio signals and provide the amplified filtered audio signals to the speakers. The one or more filters reside within or are coupled to the at least one amplifier. The system may further include a controller configured to modify at least one of the filter coefficients based on a change in the speaker configuration. The filters may operate independently of a centralized processor, and a centralized processor may not even be required to provide electronic beam forming. | 03-03-2011 |
20110064254 | CASE FOR PROVIDING IMPROVED AUDIO PERFORMANCE IN PORTABLE GAME CONSOLES AND OTHER DEVICES - A system includes a portable electronic device and a case configured to be placed in association with the portable electronic device. The case includes an interface configured to receive audio signals from the portable electronic device and a speaker array configured to generate audible sounds having one or more specified audio effects based on the audio signals. The case could also include an audio amplifier configured to amplify the audio signals and to provide the amplified audio signals to the speaker array. The audio amplifier could include a filter configured to filter the audio signals in order to produce the one or more specified audio effects. The case could further include a processor configured to (i) process the audio signals in order to produce the one or more specified audio effects and (ii) output the processed audio signals to the audio amplifier. | 03-17-2011 |
20120150542 | TELEPHONE OR OTHER DEVICE WITH SPEAKER-BASED OR LOCATION-BASED SOUND FIELD PROCESSING - A method includes obtaining audio data representing audio content from at least one speaker. The method also includes spatially processing the audio data to create at least one sound field, where each sound field has a spatial characteristic that is unique to a specific speaker. The method further includes generating the at least one sound field using the processed audio data. The audio data could represent audio content from multiple speakers, and generating the at least one sound field could include generating multiple sound fields around a listener. The spatially processing could include performing beam forming to create multiple directional beams, and generating the multiple sound fields around the listener could include generating the directional beams with different apparent origins around the listener. The method could further include separating the audio data based on speaker, where each sound field is associated with the audio data from one of the speakers. | 06-14-2012 |
20130121499 | Frequency Domain Signal Processor For Close Talking Differential Microphone Array - A system and method for processing close talking differential microphone array (CTDMA) signals in which incoming microphone signals are transformed from time domain signals to frequency domain signals having separable magnitude and phase information. Processing of the frequency domain signals is performed using the magnitude information, following which phase information is reintroduced using phase information of one of the original frequency domain signals. As a result, high pass filtering effects of conventional differential signal processing of CTDMA signals are substantially avoided. | 05-16-2013 |
20150066495 | Robust Feature Extraction Using Differential Zero-Crossing Countes - A low power sound recognition sensor is configured to receive an analog signal that may contain a signature sound. Sparse sound parameter information is extracted from the analog signal and compared to a sound parameter reference stored locally with the sound recognition sensor to detect when the signature sound is received in the analog signal. A portion of the sparse sound parameter information is differential zero crossing (ZC) counts. Differential ZC rate may be determined by measuring a number of times the analog signal crosses a threshold value during each of a sequence of time frames to form a sequence of ZC counts and taking a difference between selected pairs of ZC counts to form a sequence of differential ZC counts. | 03-05-2015 |
20150066497 | Cloud Based Adaptive Learning for Distributed Sensors - A low power sound recognition sensor is configured to receive an analog signal that may contain a signature sound. Sound parameter information is extracted from the analog signal and compared to a sound parameter reference stored locally with the sound recognition sensor to detect when the signature sound is received in the analog signal. A trigger signal is generated when a signature sound is detected. A portion of the extracted sound parameter information is sent to a remote training location for adaptive training when a signature sound detection error occurs. An updated sound parameter reference from the remote training location is received in response to the adaptive training. | 03-05-2015 |
20150066498 | Analog to Information Sound Signature Detection - A low power sound recognition sensor is configured to receive an analog signal that may contain a signature sound. The received analog signal is evaluated using a detection portion of the analog section to determine when background noise on the analog signal is exceeded. A feature extraction portion of the analog section is triggered to extract sparse sound parameter information from the analog signal when the background noise is exceeded. An initial truncated portion of the sound parameter information is compared to a truncated sound parameter database stored locally with the sound recognition sensor to detect when there is a likelihood that the expected sound is being received in the analog signal. A trigger signal is generated to trigger classification logic when the likelihood that the expected sound is being received exceeds a threshold value. | 03-05-2015 |
Patent application number | Description | Published |
20120004059 | COMPACT TENSIONER WITH SUSTAINABLE DAMPING - A tensioner assembly that includes a base, an arm, an opening spring (i.e., a torsion spring that opens or radially expands with increasing torque applied thereto), a spring reaction member, and a pivot bushing. The tensioner assembly is configured to orient various loads in predetermined directions. For example, a spring load can be oriented to counteract a hub load to reduce a bushing load that acts on the pivot bushing. As another example, a spring reaction force exerted by the spring reaction member can be employed by a damping mechanism to generate a grounding force that is parallel to the spring reaction force and is directed to intersect an axis about which the arm pivots relative to the base. A tensioner assembly having improved assembly characteristics is also provided. | 01-05-2012 |
20140287860 | TENSIONER WITH DAMPING STRUCTURE MADE FROM TWO COMPONENTS WITH NO ROTATIONAL PLAY THEREBETWEEN - In an aspect, a tensioner is provided, comprising a base, a tensioner arm, a tensioner spring, a wheel, and a damping structure. The base is mountable to an engine. The tensioner arm is pivotally connected to the base for movement about a tensioner arm axis. The tensioner spring is connected between the base and the tensioner arm and is positioned to urge the tensioner arm towards a free arm position. The wheel is rotatably mounted to the tensioner arm and is engageable with an endless drive member. A friction surface is provided on one of the base and the tensioner arm. The damping structure is provided on the other of the base and the tensioner arm and engages the friction surface to generate friction during rotation of the tensioner arm. The damping structure includes a sleeve that contains at least one aperture and a damping element that contains at least one lug that engages the at least one aperture with no circumferential clearance therebetween. | 09-25-2014 |
20150247558 | VENT STRUCTURE FOR TENSIONER - A tensioner ( | 09-03-2015 |
Patent application number | Description | Published |
20150269191 | METHOD FOR RETRIEVING SIMILAR IMAGE BASED ON VISUAL SALIENCIES AND VISUAL PHRASES - The present invention discloses a method for retrieving a similar image based on visual saliencies and visual phrases, comprising: inputting an inquired image; calculating a saliency map of the inquired image; performing viewpoint shift on the saliency map by utilizing a viewpoint shift model, defining a saliency region as a circular region which taking a viewpoint as a center and R as a radius, and shifting the viewpoint for k times to obtain k saliency regions of the inquired image; extracting a visual word in each of the saliency regions of the inquired image, to constitute a visual phrase, and jointing k visual phrases to generate an image descriptor of the inquired image; obtaining an image descriptor for each image of an inquired image library; and calculating a similarity value between the inquired image and each image in the inquired image library depending on the image descriptors by utilizing a cosine similarity, to obtain an image similar to the inquired image from the inquired image library. Through the present invention, noise in expression of an image is reduced, so that the expression of the image in a computer may be more consistent with human understanding of the semantics of the image, presenting a better retrieving effect and a higher retrieving speed. | 09-24-2015 |
20150269336 | method for selecting features of EEG signals based on decision tree - The present invention relates to a method for selecting features of EEG signals based on a decision tree: firstly, acquired multi-channel EEG signals are pre-processed, and then the pre-processed EEG signals are performed with feature extraction by utilizing principal component analysis, to obtain a analysis data set matrix with decreased dimensions; superior column vectors are obtained through analyzing from the analysis data set matrix with decreased dimensions by utilizing a decision tree algorithm, and all the superior column vectors are jointed with the number of the columns increased and the number of the rows unchanged, to be reorganized into a final superior feature data matrix; finally, the reorganized superior feature data matrix is input to a support vector machine (SVM) classifier, to perform a classification on the EEG signals, to obtain a classification accuracy. In the present invention, superior features are selected by utilizing a decision tree, to avoid influence of subjective factors during the selection, so that the selection is more objective and with a higher classification accuracy. The average classification accuracy through the present invention may reach 89.1%, increased by 0.9% compared to the conventional superior electrode reorganization. | 09-24-2015 |