Patents by Inventor Jianfeng Xu

Jianfeng Xu 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).

  • Publication number: 20110230404
    Abstract: Methods of increasing the yield in plant expression of recombinant proteins comprising engineering glycosylation sites into cloned genes or cDNAs for proteins using codons that drive post-translational modifications in plants; and engineering the cloned genes or cDNAs to contain a plant secretory signal sequence that targets the gene products (protein) for secretion. The methods result in increased recombinant glycosylated protein yields. Proteins produced according to these methods are disclosed.
    Type: Application
    Filed: January 13, 2011
    Publication date: September 22, 2011
    Applicant: OHIO UNIVERSITY
    Inventors: Marcia J. Kieliszewski, Jianfeng Xu, John Kopchick, Shigeru Okada, Gary D. Meyer
  • Publication number: 20110218800
    Abstract: The present invention relates to a method and apparatus for obtaining a pitch gain, and a coder and a decoder. The method includes: obtaining information about an input signal; and obtaining a pitch gain corresponding to the information about the input signal according to the correspondence between the signal information and the pitch gain. The embodiments of the present invention obtain the corresponding pitch gain according to the signal information by using the obtained correspondence between the signal information and the pitch gain, and the pitch gain is applicable to the coder and the decoder, thus making it unnecessary for the coder to transmit the pitch gain to the decoder and solving the problem of bit overhead. The embodiments of the present invention determine the pitch gain adaptively according to the signal information, avoid consumption of extra bits for quantizing the pitch gain, avoid impact on the coding performance, and improve the compression ratio.
    Type: Application
    Filed: May 17, 2011
    Publication date: September 8, 2011
    Applicant: Huawei Technologies Co., Ltd.
    Inventors: Dejun Zhang, Lei Miao, Jianfeng Xu, Fengyan Qi, Qing Zhang, Lixiong Li, Fuwei Ma
  • Publication number: 20110217766
    Abstract: Methods of increasing the yield in plant expression of recombinant proteins comprising engineering glycosylation sites into cloned genes or cDNAs for proteins using codons that drive post-translational modifications in plants and engineering the cloned genes or cDNAs to contain a plant secretory signal sequence that targets the gene products (protein) for secretion are present. The methods result in increased recombinant glycosylated protein yields. Proteins produced according to these methods are also present.
    Type: Application
    Filed: February 2, 2011
    Publication date: September 8, 2011
    Applicant: OHIO UNIVERSITY
    Inventors: Marcia J. Kieliszewski, Jianfeng Xu, Gary D. Meyer
  • Patent number: 7993843
    Abstract: The present invention includes methods of identifying a subject at risk for increased cellular PSA production and/or prostate cancer by detecting the presence or absence of a genetic polymorphism in the prostate specific antigen gene.
    Type: Grant
    Filed: March 10, 2010
    Date of Patent: August 9, 2011
    Assignee: Wake Forest University Health Sciences
    Inventors: Scott D. Cramer, Anuradha Rao, Jianfeng Xu, Bao-li Chang
  • Patent number: 7990658
    Abstract: A voice coil motor for a disk drive includes a permanent magnet, a voice coil adapted to move in an arc proximate to the permanent magnet, a top plate positioned above the voice coil, and a bottom plate positioned below the voice coil. The permanent magnet has two halves that are magnetized in opposite direction. The two halves of the magnet are split into a right half magnet portion and a left half magnet portion. The right half magnet portion and the left half magnet portion are attached to the top plate and the bottom plate respectively at opposite sides of the voice coil motor. The invention also discloses a disk drive unit with such VCM.
    Type: Grant
    Filed: August 21, 2007
    Date of Patent: August 2, 2011
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: YanChu Xu, JianFeng Xu, LingJun Kong, Lei Yu, Qiang Zhao
  • Patent number: 7974039
    Abstract: A disk drive to reduce head instability during disk drive manufacturing is disclosed. The disk drive comprises: a disk; a dynamic flying height (DFH) read/write head; a flying height actuator to control the spacing between the DFH read/write head and the disk; and a controller. The controller controls operations in the disk drive including applying a sloped increasing power between a first voltage and a second voltage to move the DFH read/write head towards the disk.
    Type: Grant
    Filed: June 17, 2009
    Date of Patent: July 5, 2011
    Assignee: Western Digital Technology, Inc.
    Inventors: Jianfeng Xu, Soo-Choon Kang, Kazuhiro Saito, Hongchao Tim Zhao
  • Patent number: 7957961
    Abstract: The present invention discloses a method for obtaining an attenuation factor. The method is adapted to process the synthesized signal in packet loss concealment, and includes: obtaining a change trend of a pitch of a signal; obtaining an attenuation factor, according to the change trend of the pitch of the signal. The present invention also discloses an apparatus for obtaining an attenuation factor. A self-adaptive attenuation factor is adjusted dynamically by using the latest change trend of a history signal by using the present invention. The smooth transition from the history data to the data last received is realized so that the attenuation speed is kept consistent between the compensated signal and the original signal as much as possible for adapting to the characteristic of various human voices.
    Type: Grant
    Filed: September 9, 2009
    Date of Patent: June 7, 2011
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Wuzhou Zhan, Dongqi Wang, Yongfeng Tu, Jing Wang, Qing Zhang, Lei Miao, Jianfeng Xu, Chen Hu, Yi Yang, Zhengzhong Du, Fengyan Qi
  • Publication number: 20110099005
    Abstract: A framing method and apparatus are disclosed to overcome inconsistency of gains between sub-frames caused by simple average framing in the prior art. The method includes: obtaining the Linear Prediction Coding (LPC) order and the pitch of the signal; removing the samples inapplicable to Long-Term Prediction (LTP) synthesis according to the LPC prediction order and the pitch; and splitting the remaining samples of the signal into several sub-frames. The technical solution under the present invention is applicable to the multimedia speech coding field.
    Type: Application
    Filed: December 30, 2010
    Publication date: April 28, 2011
    Inventors: Dejun ZHANG, Fengyan Qi, Lei Miao, Jianfeng Xu, Qing Zhang, Lixiong Li, Fuwei Ma
  • Publication number: 20100330566
    Abstract: The present invention includes methods of identifying a subject at risk for increased cellular PSA production and/or prostate cancer by detecting the presence or absence of a genetic polymorphism in the prostate specific antigen gene.
    Type: Application
    Filed: March 10, 2010
    Publication date: December 30, 2010
    Inventors: Scott D. Cramer, Anuradha Rao, Jianfeng Xu, Bao-li Chang
  • Publication number: 20100290538
    Abstract: A video contents generation device generates video contents smoothly connecting a series of poses of a human skeleton in conformity with the music with the reduced amount of calculation. The video contents generation device is constituted of a motion analysis unit detecting motion features from motion data representing motion segments of poses, a database storing motion data in connection with subclassification (e.g. genres and tempos), a music analysis unit detecting music features from music data representing the music subjected to the video contents generating procedure, a synchronization unit generating the synchronization information for establishing the correspondence between motion data and music data based on motion features suited to music features, and a video data generation unit generating video data synchronized with music data based on the synchronization information.
    Type: Application
    Filed: May 11, 2010
    Publication date: November 18, 2010
    Inventors: Jianfeng XU, Haruhisa Kato, Koichi Takagi, Akio Yoneyama
  • Patent number: 7835912
    Abstract: The present invention discloses a signal processing method adapted to process a synthesized signal in packet loss concealment. The method includes the following steps: receiving a good frame following a lost frame, obtaining an energy ratio of energy of a signal in the signal of the good frame signal to energy of a synthesized signal corresponding to the same time of the good frame; and adjusting the synthesized signal in accordance with the energy ratio. The present invention also discloses a signal processing apparatus and a voice decoder.
    Type: Grant
    Filed: August 11, 2009
    Date of Patent: November 16, 2010
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Wuzhou Zhan, Dongqi Wang, Yongfeng Tu, Jing Wang, Qing Zhang, Lei Miao, Jianfeng Xu, Chen Hu, Yi Yang, Zhengzhong Du, Fengyan Qi
  • Publication number: 20100267024
    Abstract: The present invention discloses methods of screening a subject for increased likelihood or risk of certain diseases or disorders. This method comprises detecting the presence or absence of at least one mutation in the MSR1 gene wherein the presence or absence of such mutation indicates an increased risk for certain diseases, such as cancer asthma and/or cardiovascular diseases.
    Type: Application
    Filed: July 16, 2009
    Publication date: October 21, 2010
    Inventors: Jianfeng Xu, Deborah Meyers, Sigun Zheng, Patrick C. Walsh, William B. Isaacs, Eugene Bleecker, David Herrington
  • Publication number: 20100232540
    Abstract: The present disclosure relates to coding and decoding technologies, and discloses a preprocessing method, a preprocessing apparatus, and a coding device. The preprocessing method includes: obtaining characteristic information of a current frame signal; identifying whether the current frame signal requires no coding operation of removing LTC according to the characteristic information of the current frame signal and preset information; and if identifying that the current frame signal requires no coding operation of removing LTC, performing the coding operation of removing STC for the current frame signal; and if identifying that the current frame signal requires the coding operation of removing LTC, performing the coding operations of removing both LTC and STC for the current frame signal. Through the technical solution provided herein, the coding operation of removing LTC is performed for only part of the input frame signals.
    Type: Application
    Filed: March 15, 2010
    Publication date: September 16, 2010
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Lei MIAO, Fengyan QI, Jianfeng XU, Dejun ZHANG, Herve Marcel TADDEI, Qing ZHANG
  • Publication number: 20100211384
    Abstract: A pitch detection method and apparatus are disclosed. The method includes: performing pitch detection on an input signal in a signal domain, and obtaining a candidate pitch; performing linear prediction (LP) on the input signal, and obtaining an LP residual signal; setting a candidate pitch range that includes the candidate pitch; searching the candidate pitch range for the LP residual signal, and obtaining a selected pitch.
    Type: Application
    Filed: April 9, 2010
    Publication date: August 19, 2010
    Inventors: Fengyan Qi, Dejun Zhang, Lei Miao, Jianfeng Xu, Herve Marcel Taddei, Qing Zhang, Yang Gao
  • Publication number: 20100169084
    Abstract: The present invention relates to a method and apparatus for pitch search. One method includes: obtaining a characteristic function value of a residual signal, where the residual signal is a result of removing a Long-Term Prediction (LTP) contribution signal from input speech signals; and obtaining a pitch according to the characteristic function value of the residual signal.
    Type: Application
    Filed: December 23, 2009
    Publication date: July 1, 2010
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Dejun Zhang, Jianfeng Xu, Lei Miao, Fengyan Qi, Qing Zhang, Herve Marcel Taddei, Lixiong Li, Fuwei Ma, Yang Gao
  • Publication number: 20100169086
    Abstract: A signal compression method includes: multiplying an input signal by a window function, calculating original autocorrelation coefficients of a windowed input signal. The method also includes calculating a white-noise correction factor or a lag-window according to the original autocorrelation coefficients, and calculating modified autocorrelation coefficients according to the original autocorrelation coefficients, the white-noise correction factor and the lag-window. The method further includes calculating linear prediction coefficients according to the modified autocorrelation coefficients, and outputting a coded bit stream according to the linear prediction coefficients.
    Type: Application
    Filed: December 29, 2009
    Publication date: July 1, 2010
    Inventors: Fengyan Qi, Lei Miao, Jianfeng Xu, Dejun Zhang, Herve Marcel Taddei, Qing Zhang
  • Patent number: 7718372
    Abstract: The present invention includes methods of identifying a subject at risk for increased cellular PSA production and/or prostate cancer by detecting the presence or absence of a genetic polymorphism in the prostate specific antigen gene.
    Type: Grant
    Filed: August 28, 2007
    Date of Patent: May 18, 2010
    Assignee: Wake Forest University Health Sciences
    Inventors: Scott D. Cramer, Anuradha Rao, Jianfeng Xu, Bao-li Chang
  • Publication number: 20100028993
    Abstract: Methods of increasing the yield in plant expression of recombinant proteins comprising engineering glycosylation sites into cloned genes or cDNAs for proteins using codons that drive post-translational modifications in plants and engineering the cloned genes or cDNAs to contain a plant secretory signal sequence that targets the gene products (protein) for secretion are present. The methods result in increased recombinant glycosylated protein yields. Proteins produced according to these methods are also present.
    Type: Application
    Filed: May 16, 2008
    Publication date: February 4, 2010
    Applicant: OHIO UNIVERSITY
    Inventors: Marcia J. Kieliszewski, Jianfeng Xu, Gary D. Meyer
  • Publication number: 20100029548
    Abstract: Methods of increasing the yield in plant expression of recombinant proteins comprising: engineering glycosylation sites into cloned genes or cDNAs for proteins using codons that drive post-translational modifications in plants; and engineering the cloned genes or cDNAs to contain a plant secretory signal sequence that targets the gene products (protein) for secretion. The methods result in increased recombinant glycosylated protein yields. Proteins produced according to these methods are disclosed.
    Type: Application
    Filed: May 8, 2008
    Publication date: February 4, 2010
    Applicant: Ohio University
    Inventors: Marcia J. Kieliszewski, Jianfeng Xu, John Kopchick, Shigeru Okada, Gary D. Meyer
  • Publication number: 20090316598
    Abstract: The present invention discloses a method for obtaining an attenuation factor. The method is adapted to process the synthesized signal in packet loss concealment, and includes: obtaining a change trend of a pitch of a signal; obtaining an attenuation factor, according to the change trend of the pitch of the signal. The present invention also discloses an apparatus for obtaining an attenuation factor. A self-adaptive attenuation factor is adjusted dynamically by using the latest change trend of a history signal by using the present invention. The smooth transition from the history data to the data last received is realized so that the attenuation speed is kept consistent between the compensated signal and the original signal as much as possible for adapting to the characteristic of various human voices.
    Type: Application
    Filed: September 9, 2009
    Publication date: December 24, 2009
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Wuzhou ZHAN, Dongqi WANG, Yongfeng TU, Jing WANG, Qing ZHANG, Lei MIAO, Jianfeng XU, Chen HU, Yi YANG, Zhengzhong DU, Fengyan QI