Patents Assigned to MStar Semiconductors, Inc.
  • Patent number: 9363779
    Abstract: Techniques are provided for reducing interference in a wireless network. A user equipment device in a first wireless coverage area of a wireless network using a time division duplex transmission scheme to designate a maximum timing advance value for uplink transmissions based on potential interference between uplink transmissions made by the user equipment device in the first wireless coverage area or at least one other user equipment device in the first wireless coverage area, and downlink transmissions intended for at least one user equipment device in a second wireless coverage area of the wireless network. The maximum timing advance value may be based on relative cell radii or other cell properties of the first and second wireless coverage areas. A base station may determine the maximum timing advance and transmit the maximum timing advance to the user equipment device.
    Type: Grant
    Filed: September 12, 2011
    Date of Patent: June 7, 2016
    Assignee: MStar Semiconductor, Inc.
    Inventors: Francesc Boixadera, Craig E. Burnet, Cyril Valadon
  • Patent number: 9363503
    Abstract: An image access method applicable to an image access device is provided. The method includes: providing a plurality of codes that respectively represent a plurality of image sources; determining a plurality of sets of access settings according to a pixel format arrangement, each set of access setting corresponding to a code arrangement combination composed of the codes; and sequentially accessing data of the image sources by the image access apparatus according to the code arrangement combinations corresponding to the access settings.
    Type: Grant
    Filed: February 5, 2014
    Date of Patent: June 7, 2016
    Assignee: MStar Semiconductor, Inc.
    Inventors: Chih-Hao Chang, Huan-Chun Tseng, Cheng-Yu Hsieh
  • Patent number: 9355744
    Abstract: A dynamic memory signal phase tracking method is provided. The method, applied to a memory controller that accesses a memory module, includes: issuing a memory access command and an access request to an arbiter to request for an access right of the memory module; when the access right is obtained, forwarding the memory access command to the memory module and asserting a flag signal; during a period of asserting the flag signal, sequentially using a plurality of candidate delay phases to adjust a memory signal for latching test data from the memory module, determining a delay phase according to latching results corresponding to the candidate delay phases, and recording the determined delay phases; updating an optimal delay phase according to the determined delay phase; and accessing the memory module according to the updated optimal delay phase.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: May 31, 2016
    Assignee: MSTAR SEMICONDUCTOR, INC.
    Inventors: Yung Chang, Chen-Nan Lin, Chung-Ching Chen
  • Patent number: 9354739
    Abstract: A self-capacitive touch control apparatus includes a plurality of electrodes, a plurality of sensors, and a number determining module. The sensors detect capacitance changes in the electrodes to generate a plurality of sensing results. The number determining module calculates a total sensing amount according to the sensing results, and determines the number of touch points according to the total sensing amount.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: May 31, 2016
    Assignee: MStar Semiconductor, Inc.
    Inventors: Chun-Chen Liu, Meng-Che Tsai
  • Patent number: 9356766
    Abstract: The current invention provides simplifications to the user equipment (UE) radio front end module for the cellular handset or dongle through modification of the existing 3GPP specifications for LTE and WCDMA/HSPA+ in order to support half duplex (HD) operation. The option to support HD operation is provided without mandating upgrades to all existing base stations that have already been deployed. The instant invention further prevents HD UEs from attaching to any base stations which do not support HD operations. The instant invention further provides inter-frequency cell search periods for enabling HD UEs to communicate with any base stations/cells supporting the HD operations. The instant invention further enables the HSPA+ system to support the HD-FDD mode.
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: May 31, 2016
    Assignees: MSTAR SEMICONDUCTOR, INC. (CAYMAN ISLANDS), MSTAR SOFTWARE R&D (SHENZHEN) LTD., MSTAR SEMICONDUCTOR, INC.
    Inventors: Francesc Boixadera, Cyril Valadon
  • Patent number: 9350403
    Abstract: A receiver includes a control module, a data receiving circuit and a masking circuit. The control circuit generates an enable signal according to a pair of differential signals provided by a transmitter. Triggered by the enable signal, the data receiving circuits generates an output signal according to the differential signals, and the masking circuit starts masking the output signal. After generating the enable signal, the control module starts providing a bias voltage to the differential signals such that the output signal has a first state. The transmitter adjusts the differential signals to render the output signal to enter a second state from the first state. Upon detecting the output signal having entered the second state, the control module stops providing the bias voltage and generates a disable signal to prompt the masking circuit to stop masking the output signal.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: May 24, 2016
    Assignee: MStar Semiconductor, Inc.
    Inventors: Ju-Yu Yu, Kai-Fei Chang
  • Patent number: 9344663
    Abstract: A sensing method for a smart terminal to interact with a sensing device in a remote control device is provided. The sensing method includes following steps. The first step is that the smart terminal obtains a current sensing device usage information. The second step is according to the current sensing device usage information and the previous sensing device usage information pre-stored in the smart terminal, the smart terminal determines whether a change occurs in a sensing device usage situation. When the change occurs in the sensing device usage situation, the remote control device associated with the smart terminal and carrying a plurality of sensing devices is notified.
    Type: Grant
    Filed: August 2, 2013
    Date of Patent: May 17, 2016
    Assignee: MSTAR SEMICONDUCTOR, INC.
    Inventors: Renzhen Zheng, Jianqun Jiang
  • Patent number: 9336793
    Abstract: A controller for an audio device is provided. The controller receives a first collected sound signal and a second collected sound signal respectively provided by two microphones, and includes an echo cancellation module and a beamforming module. The echo cancellation module performs echo cancellation on the first collected sound signal to accordingly provide an intermediate signal. The beamforming module performs beamforming by utilizing the echo-cancelled intermediate signal and the non-echo-cancelled second collected sound signal.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: May 10, 2016
    Assignee: MSTAR SEMICONDUCTOR, INC.
    Inventors: Hung-Chi Huang, Cheng-Lun Hu
  • Patent number: 9337940
    Abstract: A second-order intermodulation distortion calibration apparatus is provided. The calibration apparatus is applied to a radio-frequency (RF) transceiver, which includes a transmitter for providing an RF signal, and a receiver that is at the same time a target to be calibrated. The calibration apparatus includes a calibrator. The calibrator utilizes a logic circuit in the transmitter to generate two modulation signals having different frequencies, and utilizes two transmission paths to up-convert and combine the two modulation signals to an RF transmission signal. The calibrator further channels the RF transmission signal to the receiver to accordingly adjust second-order non-linear behaviors of the receiver and to detect a signal strength of a second-order crossover component caused by the receiver due to the second-order non-linearity. After the calibration process, the calibrator provides a control signal to minimize the signal strength of the second-order crossover component.
    Type: Grant
    Filed: July 25, 2013
    Date of Patent: May 10, 2016
    Assignee: MSTAR SEMICONDUCTOR, INC.
    Inventor: Yuan-Yu Fu
  • Patent number: 9331823
    Abstract: A wireless communication method for a wireless communication apparatus having multiple transceivers is provided. The multiple transceivers correspond to multiple component carriers. At least one transceiver connects to at least one first base station via at least one of the component carriers. The wireless communication method includes: performing communication according to multiple component carriers corresponding to the multiple transceivers; and while performing communication by simultaneously utilizing the multiple transceivers, selecting a first transceiver from the multiple transceivers to receive information of at least one second base station.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: May 3, 2016
    Assignee: MSTAR SEMICONDUCTOR, INC.
    Inventor: Chung-Wei Wang
  • Patent number: 9330664
    Abstract: A controller for a voice-controlled device is provided. The controller includes a setting module and a recognition module. The setting module generates a threshold according to an environmental parameter. The recognition module compares a confident score of speech recognition with the threshold to accordingly execute voice control.
    Type: Grant
    Filed: August 4, 2014
    Date of Patent: May 3, 2016
    Assignee: MStar Semiconductor, Inc.
    Inventor: Hung-Chi Huang
  • Patent number: 9329911
    Abstract: A hardware control method for multitasking drivers under a user mode is provided. The control method includes steps of: receiving a request for access to a hardware device from a current process under the user mode; determining whether the current process has obtained a mutual exclusion (mutex) of the hardware device; if affirmative, determining whether an identification of the current process and an identification of a previous process accessed the hardware device are the same; if negative, performing a context switch on the current process and the previous process accessed the hardware device to allow the current process to access the hardware device. Accordingly, when accessing complicated hardware devices, the disclosure significantly enhances driver performance under a user mode while also implementing secured random access to hardware devices in a multitasking environment.
    Type: Grant
    Filed: April 17, 2013
    Date of Patent: May 3, 2016
    Assignee: MSTAR SEMICONDUCTOR, INC.
    Inventors: Jian Wang, Ming-Yong Sun
  • Patent number: 9330487
    Abstract: An apparatus for processing a three-dimensional (3D) image is provided. The apparatus includes a motion estimation module and a motion interpolation module. The motion estimation module estimates a motion vector between a first object in a first-eye image and a second object in a second-eye image. The first object is the same as or similar to the second object. The motion interpolation module multiplies the motion vector by a first shift ratio to generate a first motion vector. The motion interpolation module generates a shifted first object by interpolation according to the first motion vector and the first object.
    Type: Grant
    Filed: January 10, 2013
    Date of Patent: May 3, 2016
    Assignee: MStar Semiconductor, Inc.
    Inventors: Chung-Yi Chen, Chien-Chuan Yao
  • Patent number: 9329791
    Abstract: A file system converting method converts a first file system to a second file system. The first file system manages a storages apparatus via a file allocation table (FAT). The file system converting method includes formatting the FAT to divide the storage apparatus into a plurality of storage units, and establishing a storage unit index table to record information of the plurality of storage units.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: May 3, 2016
    Assignee: MStar Semiconductor, Inc.
    Inventors: Chung Li Yang, Tsung-Yueh Lee
  • Publication number: 20160119136
    Abstract: A cryptographic device and a secret key protection method are provided. The cryptographic device protects a secret key of the cryptographic device when processing a message. The cryptographic device includes: a secret key protection circuit, configured to generate an indecipherable signal according to the message and the secret key by a hash calculation circuit; and a cryptographic processor, configured to process the message and the secret key according to the indecipherable signal to generate an encrypted message.
    Type: Application
    Filed: May 15, 2014
    Publication date: April 28, 2016
    Applicant: MStar Semiconductor, Inc.
    Inventor: Ching-Wen Ma
  • Patent number: 9319046
    Abstract: An integrated circuit capable of preventing current backflow to a power line is provided. The integrated circuit includes an input circuit. The input circuit includes a bonding pad and a pull-up circuit, a pull-up switch, a bulk controlled switch and a control circuit. The pull-up switch includes a first control node and a first bulk node. The bulk controlled switch includes a second control node and a second bulk node. The control circuit controls the first and second control nodes according to an internal signal, a power voltage of the power line and a pad voltage of the bonding pad. When the power voltage is a predetermined voltage, the control circuit turns on the bulk controlled switch. When the power line is at a ground voltage and the bonding pad voltage is at the predetermined voltage, the control circuit turns off the bulk controlled switch and the pull-up switch.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: April 19, 2016
    Assignee: MSTAR SEMICONDUCTOR, INC.
    Inventors: Shuo-Ting Kao, Chun-Wen Yeh
  • Patent number: 9318184
    Abstract: A signal receiver includes a current source providing a current having a current value, a pair of active input devices, and a pair of resistors. Each active input device includes a control node, a first conduction node, and a second conduction node. One of the control nodes receives an input signal. The first conduction nodes are connected to each other and receive the current. One of the second conduction nodes serves as an output node. The active input devices output an output signal to a core circuit according to the current and the input signal. Each resistor has a resistance value. A target voltage value is determined according to the resistance value and the current value, such that a voltage swing of the output signal is limited within the target voltage value, and an operating voltage of the core circuit is substantially equal to the target voltage value.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: April 19, 2016
    Assignee: MSTAR SEMICONDUCTOR, INC.
    Inventors: Eer-Wen Tyan, Yu-Chieh Hung, Jian-Feng Shiu, Chao-An Chen
  • Patent number: 9317167
    Abstract: A signal processing method for a touch panel is provided. The touch panel includes a first sensing region and a second sensing region. The first sensing region is monitored by at least one first sensor to generate a first monitoring result. The second sensing region is monitored by at least one second sensor to generate a second monitoring result. The signal processing method includes determining whether a touch point formed in the first sensing region is close to the second sensing region, and generating position information of the touch point according to the first monitoring result and the second monitoring result when the touch point is close to the second sensing region.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: April 19, 2016
    Assignee: MSTAR SEMICONDUCTOR, INC.
    Inventors: Chao-Ting Cheng, Meng-Che Tsai, Chao-Cheng Wen
  • Patent number: 9319971
    Abstract: A frequency adjustment method is provided for adjusting a frequency of a reference oscillating signal from an initial oscillation frequency to an adjusted oscillation frequency. The frequency adjustment method includes steps of: dividing a frequency scan section into M scan frequencies; down-converting a signal according to the M scan frequencies to obtain M down-converted signals; performing a correlation calculation operation on the M down-converted signals, respectively, to obtain M correlation results; grouping the M scan frequencies into N frequency groups each containing P selected frequencies, with the P selected frequencies corresponding to P consecutive scan frequencies; performing a group calculation on the N frequency groups, respectively, to obtain N group calculation results; and selecting a target frequency group from the N frequency groups according to the N group calculations results, and obtaining the adjusted oscillation frequency from the target frequency group.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: April 19, 2016
    Assignee: MStar Semiconductor, Inc.
    Inventors: Wei-Jen Chen, Chi-Yuan Peng, Ping-Hung Chiang, Yu-Tai Chang
  • Patent number: 9319581
    Abstract: An image editing method for editing an original image is provided. The original image has a distinct figure and an indistinct figure, which correspond to an in-focus object and an out-of-focus object, respectively. The image editing method includes: obtaining an out-of-focus object distance from the out-of-focus object to a lens; performing an inverse blurring process on the indistinct figure according to the out-of-focus object distance and an optical parameter to obtain a processed figure; and forming a processed image according to the processed figure and the distinct figure.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: April 19, 2016
    Assignee: MSTAR SEMICONDUCTOR, INC.
    Inventors: Kun-Nan Cheng, Yu-Chuan Shen