Patents Assigned to Media Tek Inc.
  • Publication number: 20130208804
    Abstract: A method and apparatus for deriving a motion vector predictor (MVP) are disclosed. The MVP is selected from spatial MVP and temporal MVP candidates. The method uses a flag to indicate whether temporal MVP candidates are disabled. If the flag indicates that the temporal MVP candidates are disabled, the MVP is derived from the spatial MVP candidates only. Otherwise, the MVP is derived from the spatial and temporal MVP candidates. The method may further skip spatial redundant MVP removal by comparing MV values. Furthermore, the parsing error robustness scheme determines a forced temporal MVP when a temporal MVP is not available and the temporal MVP candidates are allowed as indicated by the flag. The flag may be incorporated in sequence, picture, slice level, or a combination of these levels.
    Type: Application
    Filed: January 19, 2012
    Publication date: August 15, 2013
    Applicant: Media Tek Inc.
    Inventors: Jian-Liang Lin, Yi-Wen Chen, Yu-Wen Huang, Chih-Ming Fu, Chi-Ling Wu, Yu-Pao Tsai, Ching-Yeh Chen, Shaw-Min Lei
  • Publication number: 20130021048
    Abstract: An IC, a circuitry, and an RF BIST system are provided. The RF BIST system includes a test equipment, a module circuitry, and an IC. The IC is arranged to communicate with the module circuitry by an RF signal in response to a command signal from the test equipment, determine a test result by the RF signal, and report the test result to the test equipment, wherein the module circuitry is external to the IC and the test equipment.
    Type: Application
    Filed: May 25, 2012
    Publication date: January 24, 2013
    Applicant: Media Tek Inc.
    Inventors: Chun-Hsien PENG, Pei-Wei CHEN, Ping-Hsuan TSU, ChiaYu YANG, Chun-Yu LIN
  • Publication number: 20120289276
    Abstract: A communication apparatus is provided. The communications apparatus includes multiple radio modules and a manager. Each of the radio modules is arranged to provide a predetermined wireless communications service in compliance with a predetermined protocol. The manager is arranged to handle a communication indication assessment procedure of the radio modules to obtain an assessment result. The communication indication assessment procedure is performed by at least one of the radio modules, and the assessment result is shared with all of the radio modules.
    Type: Application
    Filed: May 10, 2011
    Publication date: November 15, 2012
    Applicant: Media Tek Inc.
    Inventors: Shuo-Jen Hsu, Wei-Lun Wan, Juei-Ting Sun
  • Publication number: 20120218979
    Abstract: An embodiment of a system for the coexistence of a wireless local area network (WLAN) and another type of wireless transmission is provided. A WLAN module in a power saving mode is configured to transmit a polling request (PS-Poll) at a supported rate higher than any basic rate in order to obtain buffered data from an access point (AP) when the coexisting wireless transmission module is operating. The supported rate is encoded in a supported rate set announced by the AP, and the basic rate is encoded in a basic rate set announced by the AP, and the PS-Poll is a polling request relating to a power saving mode of operation.
    Type: Application
    Filed: April 20, 2012
    Publication date: August 30, 2012
    Applicant: Media Tek Inc.
    Inventors: Chih-Hao YEH, Chia-Ming CHANG
  • Patent number: 8223617
    Abstract: A device and method for reducing power consumption of an optical drive are proposed. The present invention samples a carrier control signal and then compares the samples of the signals with predetermined threshold signals. According to the comparison result, the present invention produces at least one diphase excitation control signal. The diphase excitation control signal comprises at least one impulse signal, and a negative edge of the impulse signal is adjusted to a predetermined level during the period of the diphase excitation control signal. The present invention reduces the time for outputting the control signals and greatly reduces the power consumption of the optical drive thereby.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: July 17, 2012
    Assignee: Media Tek Inc
    Inventors: Chao-Hsin Tseng, Hsu-Feng Ho
  • Patent number: 8199619
    Abstract: A method for tuning a plurality of write strategy parameters of an optical storage device includes detecting a plurality of patterns. Each pattern corresponds to a pit or a land on a phase-changed type optical storage medium accessed by the optical storage device. The method further includes performing calculations corresponding to a plurality of data types and generating a plurality of data-to-clock edge deviations respectively corresponding to the data types. Each pattern belongs to a data type. The data-to-clock edge deviations are utilized for tuning the write strategy parameters corresponding to the data types respectively.
    Type: Grant
    Filed: February 3, 2006
    Date of Patent: June 12, 2012
    Assignee: Media Tek Inc.
    Inventors: Chih-Ching Yu, Yu-Chun Lin, Hsin-Hui Wu
  • Patent number: 8045717
    Abstract: A stereo decoder and a method therefor are provided. The stereo decoder receives a MPX signal from an FM demodulator, and comprises a first auto-calibration circuit, a band-pass filter, a second auto-calibration circuit, a slicer and a PLL circuit. The first auto-calibration circuit generates a first control signal. The band-pass filter generates the pilot signal by filtering the MPX signal with a center frequency set by the first control signal. The second auto-calibration circuit generates a second control signal. The slicer converts the pilot signal into a square wave signal. The PLL circuit comprises a voltage controlled oscillator for generating an oscillation frequency in response to the second control signal. The PLL circuit receives the square wave signal to generate the reference signal around the predetermined frequency in response to the oscillation frequency.
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: October 25, 2011
    Assignee: Media Tek Inc.
    Inventors: Chieh Hung Chen, Hsiang-Hui Chang, Chih-Chien Huang
  • Publication number: 20100327952
    Abstract: An electronic system includes an integrated circuit, powered by a first voltage, with a first device provided therein; a detection device coupled to the first device to detect an output deviation of the first device attributed to process, voltage and temperature (PVT) effects; and a compensation device coupled to the detection device, adjusting the first voltage in response to the output deviation and outputting the first voltage to the integrated circuit to compensate for the PVT effects. The electronic system further comprises a conversion device, coupled between the detection device and the compensation device, to generate an indication signal corresponding to the output deviation for the compensation device to adjust the first voltage. In addition, the compensation device may compare and amplify a difference between a voltage level of the indication signal and a reference to linearly adjust the first voltage for compensating for the PVT effects.
    Type: Application
    Filed: September 8, 2010
    Publication date: December 30, 2010
    Applicant: Media Tek Inc.
    Inventors: Mao-Lin Wu, Chih-Hung Shen, Yu-Ping Ho
  • Publication number: 20100325368
    Abstract: An apparatus includes a first processor that accesses memory according to a first clock frequency, a second processor that accesses memory according to a second clock frequency, and a memory device is configurable to selectively operate according to the first clock frequency or the second clock frequency. A memory controller enables dynamic configuration of organization of the memory device to allow a first portion of the memory device to be accessed by the first processor according to the first clock frequency and a second portion of the memory device to be accessed by the second processor according to the second clock frequency.
    Type: Application
    Filed: June 17, 2009
    Publication date: December 23, 2010
    Applicant: Media Tek, Inc.
    Inventors: Kari Ann O'Brien, George Lattimore, Joern Soerensen, Mathew B. Rutledge, Paul William Hollis
  • Patent number: 7840870
    Abstract: An apparatus for accessing and transferring optical data has a memory supporting the page-mode function, an accessing device used to access an error correction block from the optical storage medium and store it into the memory to make the portion of data in the same column of the error correction block stored in a particular locality greater than the portion of data in the same row of the error correction block stored in the particular locality, and an error correction decoder used to access the data of the error correction block to perform the error correction process. The apparatus uses the feature of the DRAM, such as page-mode function, and the data arrangement of the memory to improve the access efficiency of the memory. The apparatus can thus increase the access speed of the error correction decoder and improve the accessing efficiency.
    Type: Grant
    Filed: August 27, 2008
    Date of Patent: November 23, 2010
    Assignee: Media Tek Inc.
    Inventors: Li-Lien Lin, Wen-Yi Wu
  • Publication number: 20100265126
    Abstract: The invention provides a positioning system. In one embodiment, the positioning system comprises a Global Navigation Satellite System (GNSS) module, a dead reckoning module, a Geographic Information System (GIS) module, and an calculating module. The GNSS module generates a first positioning data according to satellite communication. The dead reckoning module estimates a second positioning data according to a sensor's measurement data, the first positioning data, and a feedback positioning data of a previous epoch. The GIS module fits the first positioning data to a map to generate a third positioning data taken as a final output of the positioning system. The calculating module integrates the third positioning data and the second positioning data according to predetermined weights to obtain the feedback positioning data of a current epoch, which is recursively fed back to the dead reckoning module for a next estimation.
    Type: Application
    Filed: June 30, 2010
    Publication date: October 21, 2010
    Applicant: MEDIA TEK INC.
    Inventor: Jen-Hao Mao
  • Patent number: 7629923
    Abstract: A method applied in a Global Navigation Satellite System (GNSS) for minimizing storage of correction data is disclosed. The method comprises: determining the receiver position and satellite positions; determining a intermediate point according to the receiver position and the satellite position; determining a current cell of the intermediate point; and storing the correction data sets related to the current cell.
    Type: Grant
    Filed: March 14, 2006
    Date of Patent: December 8, 2009
    Assignee: Media Tek Inc.
    Inventor: Kung-Shuan Huang
  • Patent number: 7623424
    Abstract: An apparatus for identifying the address in pregroove (ADIP) of a Blu-ray disc is described. The apparatus uses a statistical scheme or distance-finding scheme to find the position of a predetermined minimum shift keying (MSK) mark or the first MSK mark, i.e. a bit sync unit, from an ADIP unit to identify data of the ADIP unit. The present invention doesn't have the error propagation effect occurring in the prior art so that the error rate for ADIP identification can be greatly reduced.
    Type: Grant
    Filed: January 26, 2005
    Date of Patent: November 24, 2009
    Assignee: Media Tek Inc.
    Inventors: Chun-Nan Chen, Wen-Yi Wu, Pi-Hai Liu
  • Patent number: 7606434
    Abstract: An apparatus and a method for forming a data structure that improves error resilience when applied to the coding of hierarchical subband decomposed coefficients, e.g., wavelet transform coefficients. The texture unit is defined as comprising only those AC transform coefficients that are located in one or more slices in a single subband. The texture unit is defined as comprising only those AC transform coefficients that are across “n” subbands, where “n” is smaller number than the total number of “N” levels of decomposition. A texture unit can also be defined as comprising only those bits from the DC transform coefficients that form a single bitplane.
    Type: Grant
    Filed: September 14, 2005
    Date of Patent: October 20, 2009
    Assignees: Media Tek Inc., Sharp Kabushiki Kaisha
    Inventors: Bing-Bing Chai, Iraj Sodagar
  • Patent number: 7567054
    Abstract: A control circuit and a control method of controlling a rotation frequency of a spindle in an optical disc drive, the control circuit comprising: a spindle controller, electrically coupled to the spindle, for driving the spindle to rotate an optical disc according to a rotation control signal; a detector, electrically coupled to the spindle controller, for detecting the rotation frequency and for generating detecting signals; a frequency-adjusting module, electrically coupled to the detector, for adjusting at least one of the detecting signals to reduce a rotation frequency difference between detecting signals; a signal selector, electrically coupled to the frequency-adjusting module, for receiving output signals generated from the frequency-adjusting module and then outputting the rotation control signal.
    Type: Grant
    Filed: March 1, 2006
    Date of Patent: July 28, 2009
    Assignee: Media Tek Inc.
    Inventors: Yu-Hsuan Lin, Jin-Bin Yang, Chih-Ching Chen, Gwo-Huei Wu
  • Publication number: 20090174491
    Abstract: A mixed-mode PLL is disclosed. The mixed-mode PLL comprises an analog phase correction path and a digital frequency correction path. The analog phase correction path comprises a linear phase correction unit (LPCU). The digital frequency correction path comprises a digital integral path circuit.
    Type: Application
    Filed: January 7, 2009
    Publication date: July 9, 2009
    Applicant: MEDIA TEK INC.
    Inventors: Ping-Ying Wang, Jing-Hon Conan Zhan
  • Patent number: 7545206
    Abstract: An apparatus for biasing a transistor, comprising: a controllable bias generator; a test circuit; a digital Mth order differentiator responsive to an output of the test circuit; and a controller responsive to the digital Mth order differentiator for controlling the controllable bias generator; wherein the test circuit is configured to calculate an Lth order derivative of the transistor's performance.
    Type: Grant
    Filed: December 4, 2007
    Date of Patent: June 9, 2009
    Assignee: Media Tek Inc.
    Inventor: Jonathan Richard Strange
  • Patent number: 7539894
    Abstract: A method for accessing data in an optical disk with a drive. The drive has a memory. The optical disk has data blocks for recording data, and spare blocks for replacing defect data blocks. The method includes reading a predetermined number of spare blocks into the memory, and while reading a defect data block, checking whether a corresponding replacing spare block is stored in the memory. If so, suspending further reading of the spare block. Otherwise, reading the spare block with a predetermined number of other spare blocks into the memory to reduce further reading of spare blocks.
    Type: Grant
    Filed: November 8, 2006
    Date of Patent: May 26, 2009
    Assignee: Media Tek Inc.
    Inventor: Yuan-Ting Wu
  • Patent number: 7512453
    Abstract: The present invention relates to an audio data synthesis system for sequentially processing a first predetermined number of audio data to synthesize a digital audio signal cumulatively. The system comprises a first memory, a first processor, an audio data processing unit, and a second memory. The first memory is for storing a plurality of audio data. The first processor is for generating an audio processing request for requesting to process a second predetermined number of audio data. The audio data processing unit is for receiving the audio processing request, accessing the second predetermined number of audio data stored in the first memory, and calculating every two neighboring audio data to get data processing values, and after calculating all the second predetermined number of audio data, then obtaining a third predetermined number of data processing values. The second memory is for storing the third predetermined number of audio data.
    Type: Grant
    Filed: May 25, 2004
    Date of Patent: March 31, 2009
    Assignee: Media Tek, Inc.
    Inventors: Cheng-Ting Wu, Hung-Ming Chang, I-Hung Hsieh
  • Patent number: 7474260
    Abstract: A satellite signal adjustable time-division multiplexing receiver for GNSS and a method for acquiring and tracking satellite signal used in the receiver. The present invention executes correlation in an adjustable time-division multiplexing and uses a clock signal with a clock rate to control speed of correlation. The clock rate can be fixed or variable. In the case that the clock rate is variable, when the speed is required to be fast (e.g. in satellite acquisition mode), the clock rate is set to be high clock rate; when the speed needs not be so fast (e.g. in signal tracking mode), the clock rate can be lower down to reduce power consumption. The adjustable time-division multiplexing is arranged for respective domains such as visible satellite, code phase, Doppler frequency and tracking accuracy according to the clock rate.
    Type: Grant
    Filed: April 19, 2006
    Date of Patent: January 6, 2009
    Assignee: Media Tek Inc.
    Inventor: Chun-nan Chen