MStar Semiconductor Inc.

Hsinchu, Taiwan

MStar Semiconductor Inc.

Hsinchu, Taiwan
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A multimedia communication apparatus, suitable for a first multimedia apparatus, is adapted to transmit or receive multimedia data and is electrically connectable to a standard connector. The standard connector may be non-reversibly or reversibly connected to a plug of a standard cable, and includes a plurality of the pins. The pins include multiple differential signal pins serving as multiple multimedia channels, a power pin serving as a power line, a first polarity pin, a first data pin and a ground pin. The multimedia communication apparatus includes a control logic and a multimedia signal processor. The multimedia signal processor transmits or receives multimedia data to/from a second multimedia apparatus through the multimedia channels, and further power handshakes or exchanges information with the second multimedia apparatus. The information is for controlling a multiplexer to switch the multimedia channels.


Patent
MStar Semiconductor Inc. | Date: 2017-01-09

An apparatus for estimating carrier frequency offset includes an M^(th )power circuit, a spectrum generating circuit, a peak frequency determining circuit and a frequency offset determining circuit. The M^(th )power circuit performs an M^(th )power calculation on an input signal to generate an M^(th )power calculation result. The spectrum generating circuit generates an M^(th )power spectrum according to the M^(th )power calculation result. The peak frequency determining circuit determines a peak frequency corresponding to an amplitude peak from the M^(th )power spectrum. The frequency offset determining circuit determines an estimated carrier frequency offset according to the peak frequency.


An apparatus for estimating carrier frequency offset for multipath signals includes an echo signal filtering circuit, an M^(th )power circuit, a spectrum generating circuit, a peak frequency determining circuit and a frequency offset determining circuit. The echo signal filtering circuit filters out an echo signal from an input signal to generate a filtered signal. The M^(th )power circuit performs an M^(th )power calculation on the filtered signal to generate an M^(th )power calculation result. The spectrum generating circuit generates an M^(th )power spectrum according to the M^(th )power calculation result. The peak frequency determining circuit determines a peak frequency corresponding to an amplitude peak from the M^(th )power spectrum. The frequency offset determining circuit determines an estimated carrier frequency offset according to the peak frequency.


A television managing apparatus cooperating with a remote controller includes a receiver and a controller. The receiver receives an instruction sent from the remote controller. The controller actives a performance optimization process in response to each latest instruction that the receiver receives.


Patent
MStar Semiconductor Inc. | Date: 2017-01-23

A analog equalizer includes: an adjusting circuit, generating an adjustment signal and a selection signal; a cascaded equalization circuit, receiving the adjustment signal, and adjusting at least one of a tunable resistor, a tunable capacitor and a tunable current source in the multi-stage equalization circuit according to the adjustment signal to perform an equalization process on a signal to be equalized; and an analog multiplexer, coupled to the cascaded equalization circuit and the adjusting circuit, selecting and outputting an equalized signal outputted from one stage of the multi-stage equalization circuit according to the selection signal. Wherein, the adjusting circuit adjusts the adjustment signal and the selection signal according to the equalized signal outputted from the analog multiplexer and a target equalization value.


Patent
MStar Semiconductor Inc. | Date: 2017-01-05

A time de-interleaving method is applied to a signal receiver of a communication system to perform a time de-interleaving process on an interleaved signal. The interleaved signal includes a first time interleaved block and a second time interleaved block. The time de-interleaving method includes: reading a first part of cells of the first time interleaved block from a memory; releasing a memory space corresponding to the first part of the cells in the memory; and writing a second part of cells of the second time interleaved block into the memory space before the first time interleaved block is completely read out from memory.


Patent
MStar Semiconductor Inc. | Date: 2017-08-02

The invention relates to a detection circuit, applied to a Digital Video Broadcasting receiver to detect a position of a data frame of an input signal, the input signal comprising a continuous wave interference component, the detection circuit comprising: a correlation calculation circuit (41), generating a correlation signal according to the input signal; a first moving average circuit (42), coupled to the correlation calculation circuit (41), performing a moving average calculation on the correlation signal to generate a first moving average result; a frequency shift circuit (418), coupled to the correlation calculation circuit (41), performing a frequency shift operation on the correlation signal to generate a frequency shifted correlation signal; a second moving average circuit (43), coupled to the frequency shift circuit (418), performing a moving average calculation on the frequency shifted correlation signal to generate a second moving average result; a calculation circuit (44, 60), coupled to the first moving average circuit (42) and the second moving average circuit (43), eliminating the continuous wave interference component according to the first moving average result and the second moving average result and accordingly generating an output signal; and a determination circuit (49), coupled to the calculation circuit, determining the position according to a peak of the output signal. The invention also relates to a detection method applied to a Digital Video Broadcasting (DVB) receiver to detect a position of a data frame of an input signal. The input signal includes a continuous wave interference component. The method includes generating a correlation signal according to the input signal, performing a moving average calculation on the correlation signal to generate a first moving average result, performing a frequency shift operation on the correlation signal to generate a frequency shifted correlation signal, performing the moving average calculation on the frequency shifted correlation signal to generate a second moving average result, eliminating the continuous wave interference component according to the first moving average result and the second moving average result and accordingly generating an output signal, and determining the position according to a peak of the output signal.


Patent
MStar Semiconductor Inc. | Date: 2017-01-25

A control method for a touch display device including a display panel is provided. The display panel includes multiple first gate lines and multiple second gate lines respectively corresponding to a first field and a second field of a frame, and multiple sensing electrodes for touch sensing. Within one single frame period, the control method includes: scanning the first gate lines to update the first field; controlling the sensing electrodes to perform touch sensing and providing a first touch report; scanning the second gates lines to update the second field; and controlling the sensing electrodes to perform touch sensing and providing a second touch report. At least one of the first gates lines is located between two of the second gate lines, and at least one of the second gate lines is located between two of the first gate lines.


Patent
MStar Semiconductor Inc. | Date: 2017-05-31

A circuit (400, 700, 800) for detecting a carrier frequency offset includes: a Golay matched filter (300; 410, 420, 430), filtering an input signal according to a set of coefficients (w_(n)) to generate an output signal, wherein the set of coefficients is associated with a Golay complementary sequence corresponding to the input signal; and a determination circuit (440), determining a peak value of the output signal, and determining the carrier frequency offset according to a carrier number corresponding to the peak value.


A touch display apparatus capable of fingerprint recognition includes a display panel, a cover plate, a touch sensing electrode set and a fingerprint recognition electrode set. The display panel includes a first surface. The cover plate covers the first surface of the display panel, and includes a second surface facing the first surface of the display panel. The touch sensing electrode set is disposed between the display panel and the cover plate. The fingerprint recognition electrode set is directly formed on the first surface of the display panel or the second surface of the cover plate. The cover plate further covers the fingerprint recognition electrode set.

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