Hsinchu City, Taiwan
Hsinchu City, Taiwan

MediaTek Inc. is a fabless semiconductor company that provides system-on-chip solutions for wireless communications, HDTV, DVD and Blu-ray. Headquartered in Hsinchu, Taiwan, the company has 25 offices worldwide and was the 4th largest IC designer worldwide in 2013. Since its founding in 1997, MediaTek has been creating chipset solutions for the global market. MediaTek also provides its customers with reference designs. Wikipedia.


Time filter

Source Type

An envelope extracting apparatus includes: a clock extracting device arranged to extract a clock signal of a receiving modulation signal according to a first biasing voltage; and an edge detecting device arranged to generate a detecting signal to indicate an envelope edge of the receiving modulation signal according to a delayed clock signal of the clock signal and a second biasing voltage; wherein the second biasing voltage or a delay time of the clock signal is adjustable.


An envelope extracting apparatus includes: a clock extracting device arranged to extract a clock signal of a receiving modulation signal according to a first biasing voltage; and an edge detecting device arranged to generate a detecting signal to indicate an envelope edge of the receiving modulation signal according to a delayed clock signal of the clock signal and a second biasing voltage.


An envelope extracting apparatus includes: a clock extracting device arranged to extract a clock signal of a receiving modulation signal according to a first biasing voltage; and an edge detecting device arranged to generate a detecting signal to indicate an envelope edge of the receiving modulation signal according to a delayed clock signal of the clock signal and a second biasing voltage; wherein the second biasing voltage or a delay time of the clock signal is adjustable.


A method of indoor positioning using Fine Timing Measurement (FTM) avoiding co-located access point (AP) is proposed. In a wireless local area network, an AP obtains neighboring AP location information and determines a list of co-located BSSIDs. In a first option, an STA first selects an AP and query for AP location and co-located BSSID information using ANQP (Access Network Query Protocol). In a second option, the STA first selects an AP and initiates FTM protocol with the selected AP and thereby obtaining AP location and co-located BSSID information. Upon obtaining the AP location and the co-located BSSID list, the STA can initiates FTM protocol with additional non-co-located BSSs for determining an accurate STA location.


Patent
MediaTek | Date: 2017-05-17

A method and apparatus for deriving a sub-block motion vector for the current sub-block based on a motion-model function depending on the current sub-block location are disclosed. The derived sub-block motion vector is then used for encoding or decoding the sub-block. The motion-model function may correspond to an affine motion-model function or a bilinear motion-model function. In one embodiment, a new Merge mode can be used to apply prediction of a current block by applying prediction on the sub-block basis using the sub-block motion vector derived from the motion-model function. In another embodiment, an additional inter prediction mode can be used to apply prediction of a current block by applying prediction on the sub-block basis using the sub-block motion vector derived from the motion-model function.


A method and apparatus of deriving a temporal derived motion vector in a second direction based on a given motion vector in a first direction for motion vector prediction are disclosed. According to the present invention, a given motion vector for a current block is determined, where the given motion vector points from the current block in a first direction. A reference motion vector associated with a first reference block in a first reference frame is identified. Then, based on the reference motion vector and the given motion vector, a temporal derived motion vector is derived. The temporal derived motion vector points from the current block to a second reference block in a second reference frame in a second direction different from the first direction. The temporal derived motion vector is then used as one predictor for encoding or decoding of the motion vector of the current block.


Patent
MediaTek | Date: 2017-03-08

A method to indicate a rate is proposed. In this method, a first wireless device determines a rate indicator and then transmits a packet including the rate indicator to a second wireless device. In one embodiment, the rate indicator can be determined by the first wireless device. In another embodiment, the second wireless device can suggest a rate and send it to the first wireless device.


A phase locked loop (PLL) includes a controllable oscillator, a charge pump, a type II loop filter, a frequency divider, a phase error processing circuit, a phase frequency detector and a phase alignment circuit. The controllable oscillator generates an oscillating signal. The charge pump circuit generates a charge pump output in a calibration mode. The type II loop filter generates a first control signal to the controllable oscillator according to the charge pump output. The frequency divider performs frequency division upon the oscillating signal for generating a feedback signal. The phase error processing circuit outputs an adjusting signal by comparing a reference signal with the feedback signal. The phase frequency detector generates a detection signal by comparing the feedback signal and the reference signal. The phase alignment circuit generates a second control signal in the calibration mode.


Methods and apparatus are provided for paging transmission and reception for UEs requiring repeatedly paging. In one novel aspect, the UE reports the status to the MME. UE status information and the corresponding cell ID are provided from eNB to MME. MME sends paging information including the repetition number to all eNBs in the corresponding tracking area when paging the UE. In another novel aspect, a paging area is used for UEs requiring repeatedly paging. The UE receives paging area information, notifies the network, and updates the stored paging area information upon detecting changes between the received and the stored paging areas. In another embodiment, the UE reports its status upon detecting status changes. The eNB stores UE information and forwards it to neighboring eNBs in the same paging area. The eNB pages UEs on its UE list with repetition while paging other UEs normally.


A method of cross-component residual prediction for video data comprising two or more components is disclosed. First prediction data and second prediction data for a first component and a second component of a current block are received respectively. One or more parameters of a cross-component function are derived based on the first prediction data and the second prediction data. The cross-component function is related to the first component and the second component with the first component as an input of the cross-component function and the second component as an output of the cross-component function. A residual predictor is derived for second residuals of the second component using the cross-component function with first reconstructed residuals of the first component as the input of the cross-component function. The predicted difference between the second residuals of the second component and the residual predictor is encoded or decoded.

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