Patents by Inventor Jwu-Sheng Hu
Jwu-Sheng Hu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8670256Abstract: The present invention provides an apparatus for controlling a multiphase multilevel voltage source inverter. The apparatus includes a signal-generating unit and a converter. The signal-generating unit responds to an input signal to produce a switching strategy control signal and a duration timing control signal corresponding to the switching strategy control signal. The converting unit responds to the switching strategy control signal and the duration timing control signal to produce a switching signal. The voltage source inverter responds to the switching signal to generate a multiphase-and-multilevel AC voltage output.Type: GrantFiled: October 13, 2010Date of Patent: March 11, 2014Assignee: National Chiao Tung UniversityInventors: Jwu-Sheng Hu, Keng-Yuan Chen, Chi-Him Tang
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Publication number: 20140050052Abstract: A method for detecting a spatial position of an indicator object by using sound waves. The method is adapted to be used with a sound wave transceiver device and a plurality of sound wave receiving devices. The method includes steps of: obtaining a relative position of the sound wave transceiver device to each one of the sound wave receiving devices; obtaining a plurality of reflection times respectively indicating time periods from the sound wave transceiver device emitting the sound wave to the sound wave transceiver device and the sound wave receiving devices receiving the reflected sound wave from the indicator object; and calculating a position of the indicator object according to the relative positions and the reflection times. A system for detecting a spatial position of an indicator object by using sound waves is also provided.Type: ApplicationFiled: March 14, 2013Publication date: February 20, 2014Applicant: AU OPTRONICS CORP.Inventors: JWU-SHENG HU, CHUNG-WEI JUAN, FANG-CHING LEE
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Patent number: 8571707Abstract: A glove puppet manipulating system comprises a control module for generating control signals base on movements of human hand and a robot electrically connecting the control module installed inside a glove puppet. The robot has a body manipulating apparatus disposed on a foundation to manipulate the body of the glove puppet to rotate, a pair of hand manipulating apparatuses disposed on the body manipulating apparatus to manipulate the hands of the glove puppet to swivel, and a head manipulating apparatus interposed between the hand manipulating apparatuses on the body manipulating apparatus to manipulate the head of the glove puppet to nod.Type: GrantFiled: July 15, 2009Date of Patent: October 29, 2013Assignee: National Chiao Tung UniversityInventors: Jwu-Sheng Hu, Jyun-Ji Wang, Guan-Qun Sun, Chi-Him Tang
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Publication number: 20130243330Abstract: A method and an apparatus for constructing an image blur pyramid, and an image feature extracting circuit are disclosed. The image blur pyramid construction apparatus comprises a first image blur circuit, a second image blur circuit and an image sub-sampler. The first image blur circuit and the second image blur circuit simultaneously generate a first interval and a second interval in the same octave according to an input image, a first filter and a second filter. The dimension of the second filter is greater than that of the first filter. The image sub-sampler couples with the second image blur circuit and down samples the second interval to generate a sub-sample image.Type: ApplicationFiled: August 20, 2012Publication date: September 19, 2013Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Liang-Chi Chiu, Yen-Chung Chang, Jiun-Yan Chen, Jwu-Sheng Hu, Tian-Sheuan Chang
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Patent number: 8536823Abstract: A driving method for driving a polyphase inverter includes: receiving a reference input that includes a fundamental frequency component, and a previously generated feedback signal; generating an error signal that corresponds to a difference between the reference input and the previously generated feedback signal; attenuating the error signal to the minimum; generating an optimum signal; quantizing the optimum signal; and generating driving signals that correspond to the quantized optimum signal. A driving device that implements the driving method is also disclosed.Type: GrantFiled: January 7, 2010Date of Patent: September 17, 2013Assignee: National Chiao Tung UniversityInventors: Jwu-Sheng Hu, Keng-Yuan Chen
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Patent number: 8395663Abstract: A positioning system and a method thereof are provided. In the positioning method, a first and a second pose information of a moving device are obtained by a first positioning device and a second positioning device respectively, wherein the first pose information corresponds to the second pose information. In addition, a plurality of first candidacy pose information is generated in an error range of the first pose information. Furthermore, a plurality of second candidacy pose information is generated according to the first pose information respectively. One of the second candidacy pose information having a smallest error derived from the second pose information is selected for updating the pose information of the first positioning device and parameter information of the second positioning device. Thereby, pose information of the moving device is updated and parameter information of the second orientation devices is calibrated simultaneously.Type: GrantFiled: February 17, 2009Date of Patent: March 12, 2013Assignee: Industrial Technology Research InstituteInventors: Hsiang-Wen Hsieh, Jwu-Sheng Hu, Shyh-Haur Su, Chin-Chia Wu
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Publication number: 20120310646Abstract: A speech recognition device and a speech recognition method thereof are disclosed. In the speech recognition method, a key phrase containing at least one key word is received. The speech recognition method comprises steps: receiving a sound source signal of a key word and generating a plurality of audio signals; transforming the audio signals into a plurality of frequency signals; receiving the frequency signals to obtain a space-frequency spectrum and an angular estimation value thereof; receiving the space-frequency spectrum to define and output at least one spatial eigenparameter and, and using the angular estimation value and the frequency signals to perform spotting and evaluation and outputting a Bhattacharyya distance; and receiving the spatial eigenparameter and the Bhattacharyya distance and using corresponding thresholds to determine correctness of the key phrase. Thereby this invention robustly achieves high speech recognition rate under very low SNR conditions.Type: ApplicationFiled: July 7, 2011Publication date: December 6, 2012Applicant: NATIONAL CHIAO TUNG UNIVERSITYInventors: JWU-SHENG HU, MING-TANG LEE, TING-CHAO WANG, CHIA HSIN YANG
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Publication number: 20120093333Abstract: The present invention provides a spatially pre-processed target-to-jammer ratio weighted filter and a method thereof, which uses two microphones to receive audio signals. The audio signals are divided into a plurality of sinusoidal waves by a fast Fourier transform (FFT) module, and a beamformer uses the sinusoidal waves to generate beamformed signals. A reference generator generates at least one reference signal. The beamformed signals and reference signals are used to work out power spectral densities (PSD), and a target-to-jammer ratio (TJR) is worked out with the power spectral densities. TJR is used to determine whether a sound source exists. According to the determination result, a noise estimator is switched to eliminate noise from the beamformed signals and generate output signals. An inverse fast Fourier transform (IFFT) module recombines the output signals and then outputs the recombined signals.Type: ApplicationFiled: March 21, 2011Publication date: April 19, 2012Applicant: NATIONAL CHIAO TUNG UNIVERSITYInventors: JWU-SHENG HU, MING-TANG LEE
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Publication number: 20120002453Abstract: The present invention provides an apparatus for controlling a multiphase multilevel voltage source inverter. The apparatus includes a signal-generating unit and a converter. The signal-generating unit responds to an input signal to produce a switching strategy control signal and a duration timing control signal corresponding to the switching strategy control signal. The converting unit responds to the switching strategy control signal and the duration timing control signal to produce a switching signal. The voltage source inverter responds to the switching signal to generate a multiphase-and-multilevel AC voltage output.Type: ApplicationFiled: October 13, 2010Publication date: January 5, 2012Applicant: NATIONAL CHIAO TUNG UNIVERSITYInventors: Jwu-Sheng HU, Keng-Yuan CHEN, Chi-Him TANG
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Publication number: 20110235865Abstract: An adjustable range finder and the method thereof are disclosed, in which the method comprising: projecting a first beam containing information of an object on a refractive optical element, being comprised a liquid-crystal layer, electrically connected to a voltage device, and a transmission blazed grating, so as to generate a second beam; enabling the voltage device to provide a first voltage to the liquid-crystal layer for forming an energy-concentrated Mth-order diffraction image by the projection of the second beam; adjusting and enabling the voltage device to provide a second voltage to the liquid-crystal layer for forming an energy-concentrated Nth-order diffraction image by the projection of the second beam; forming a series of images by the use of the Mth-order diffraction image and the Nth-order diffraction image; comparing the disparity between corresponding points in the series of images for obtaining the distance between the object and the refractive optical element.Type: ApplicationFiled: June 2, 2010Publication date: September 29, 2011Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Chih-Cheng Cheng, Shyh-Haur Su, Jwu-Sheng Hu, Yu-Nan Pao, Chin-Ju Hsu, Yen-Chung Chang
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Publication number: 20110090317Abstract: A stereovision system is disclosed, which comprises: at least one diffractive optical element and an optical imaging device. Each of the diffractive optical element is used for allowing a first beam containing information relating to an object to pass through and thus transforming the same into a second beam containing information relating to the object. The optical imaging device is used for receiving the second beam so as to concentrate the energy thereof for forming an Mth-order diffraction image. By combining the aforesaid Mth-order diffraction image with another energy-concentrated Nth-order diffraction image, a series of images can be formed. Accordingly, by comparing the disparity between corresponding points in the series of images, the distance between the object and the diffractive optical element can be obtained. It is noted that the aforesaid M and N represent the order of diffraction.Type: ApplicationFiled: May 27, 2010Publication date: April 21, 2011Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Shyh-Haur Su, Chih-Cheng Cheng, Jwu-Sheng Hu, Shyh-Roei Wang, Yu-Nan Pao, Chin-Ju Hsu
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Patent number: 7889875Abstract: The present invention provides a class D amplifier and method for driving a tri-wired stereo amplifier. Additionally, the class D amplifier includes a first filter, a second filter, a processor, a 2D-quantitizer, a signal generator, and a logic circuit. The class D amplifier and method of the invention can reduce cost of production and increase processing efficiency. More particularly, the class D amplifier and method of the invention are processed in an optimal feedback mode, so as to reduce the reciprocal effect between the two channels, and avoid mismatch of the two amplifiers.Type: GrantFiled: November 9, 2006Date of Patent: February 15, 2011Assignee: National Chiao Tung UniversityInventors: Jwu-Sheng Hu, Keng-Yuan Chen
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Publication number: 20100309693Abstract: A driving method for driving a polyphase inverter includes: receiving a reference input that includes a fundamental frequency component, and a previously generated feedback signal; generating an error signal that corresponds to a difference between the reference input and the previously generated feedback signal; attenuating the error signal to the minimum; generating an optimum signal; quantizing the optimum signal; and generating driving signals that correspond to the quantized optimum signal. A driving device that implements the driving method is also disclosed.Type: ApplicationFiled: January 7, 2010Publication date: December 9, 2010Inventors: Jwu-Sheng HU, Keng-Yuan CHEN
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Publication number: 20100157048Abstract: A positioning system and a method thereof are provided. In the positioning method, a first and a second pose information of a moving device are obtained by a first positioning device and a second positioning device respectively, wherein the first pose information corresponds to the second pose information. In addition, a plurality of first candidacy pose information is generated in an error range of the first pose information. Furthermore, a plurality of second candidacy pose information is generated according to the first pose information respectively. One of the second candidacy pose information having a smallest error derived from the second pose information is selected for updating the pose information of the first positioning device and parameter information of the second positioning device. Thereby, pose information of the moving device is updated and parameter information of the second orientation devices is calibrated simultaneously.Type: ApplicationFiled: February 17, 2009Publication date: June 24, 2010Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Hsiang-Wen Hsieh, Jwu-Sheng Hu, Shyh-Haur Su, Chin-Chia Wu
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Publication number: 20100093252Abstract: A glove puppet manipulating system comprises a control module for generating control signals base on movements of human hand and a robot electrically connecting the control module installed inside a glove puppet. The robot has a body manipulating apparatus disposed on a foundation to manipulate the body of the glove puppet to rotate, a pair of hand manipulating apparatuses disposed on the body manipulating apparatus to manipulate the hands of the glove puppet to swivel, and a head manipulating apparatus interposed between the hand manipulating apparatuses on the body manipulating apparatus to manipulate the head of the glove puppet to nod.Type: ApplicationFiled: July 15, 2009Publication date: April 15, 2010Applicant: National Chiao Tung UniversityInventors: Jwu-Sheng HU, Jyun-Ji Wang, Guan-Qun Sun, Chi-Him Tang
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Publication number: 20090310865Abstract: A video surveillance system gets a first image from at least a video source, and extracts its image features. It embeds annotation information with at least the image features into the first image, and converts the embedded image into a second image without changing the image format. After having compressed and decompressed the second image, the system extracts the embedded information from the decompressed embedded stream to separate the image and the annotation information, thereby obtaining completely recovered annotation information after a recovery process and an image processing. Because the image format is not changed, the operations on the second image at the rear end of the system, such as compression and decompression, are not affected.Type: ApplicationFiled: December 25, 2008Publication date: December 17, 2009Inventors: Jenn Hwan Tarng, Jwu-Sheng Hu, Yu Lun Huang, Bor-Gaung Chang, Chie-Chung Kuo, Lih-Guong Jang, Li-Huei Chen
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Publication number: 20080111624Abstract: The present invention provides a class D amplifier and method for driving a tri-wired stereo amplifier. Additionally, the class D amplifier includes a first filter, a second filter, a processor, a 2D-quantitizer, a signal generator, and a logic circuit. The class D amplifier and method of the invention can reduce cost of production and increase processing efficiency. More particularly, the class D amplifier and method of the invention are processed in an optimal feedback mode, so as to reduce the reciprocal effect between the two channels, and avoid mismatch of the two amplifiers.Type: ApplicationFiled: November 9, 2006Publication date: May 15, 2008Inventors: Jwu-Sheng Hu, Keng-Yuan Chen
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Publication number: 20070150111Abstract: The present invention discloses an embedded network-controlled omni-directional motion system with optical flow based navigation, wherein multiple motion units and at least one embedded network control system are installed to the body, and at least one optical flow sensor is installed on the ground-facing surface of the body. The movement of the body is driven by the motion units, and the motion unit has an omni-directional wheel and a motor device. The optical flow sensors detect the state of motion and create optical-flow detection data. The embedded network control system exchanges motion control instructions and optical-flow detection data with an external information-processing unit via a communication network. Further, the motion system of the present invention may also connect with peripheral control devices to increase the control convenience of the system.Type: ApplicationFiled: March 9, 2006Publication date: June 28, 2007Inventors: Li-Wei Wu, Jung-Hung Cheng, Yung-Jung Chang, Jwu-Sheng Hu
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Publication number: 20040181590Abstract: The present invention provides a device for switching frame and inputting command via network transmission. The device is connected to a plurality of far-end computers via network so that a user can select and switch frame by using control commands of an input unit, or can issue control commands via network by using a far-end control program, thereby transferring the received real-time frame of a far-end computer to a display unit.Type: ApplicationFiled: March 14, 2003Publication date: September 16, 2004Inventors: Wen-Shan Liou, Jwu-Sheng Hu, Chun Chi Liao