公开(公告)号：US20140254652A1

公开(公告)日：2014-09-11

申请号：US14200664

申请日：2014-03-07

Applicant: MStar Semiconductor, Inc.

Inventor： Ching-Fu Lan ,  Hsin-Chuan Kuo ,  Tung-Sheng Lin ,  Tai-Lai Tung

IPC: H04L27/26

CPC classification number: H04L27/2656 ,  H04L25/067 ,  H04L27/2672 ,  H04L27/2675 ,  H04L27/3881

Abstract: A digital broadcasting receiving system is provided. A receiving module receives an M number of symbols each carrying an N number of subcarriers of a control signal. A converting module performs FFT on respective kth subcarriers of an ith symbol and an (i+1)th symbol to generate an (i, k)th converted value and an (i+1, k)th converted value. A demodulating module performs differential demodulation on the (i, k)th and (i+1, k)th converted values to generate an (i, k)th demodulation value. A combining module soft-combines the (i, 1)th demodulation value through the (i, N)th demodulation value to generate an ith prediction value corresponding to the ith symbol. A determining module identifies a synchronization segment in the control signal according to the 1st prediction value to the (M−1)th prediction value.

Abstract translation: 提供数字广播接收系统。 接收模块接收M个符号，每个符号携带N个控制信号的子载波。 A转换模块对第i个符号和第（i + 1）个符号的第k个子载波执行FFT，以产生（i，k）转换值和第（i + 1，k）个转换值。 解调模块对（i，k）和（i + 1，k）个转换值执行差分解调，以产生（i，k）解调值。 组合模块通过（i，N）解调值对（i，1）解调值进行软组合，生成与第i个符号对应的第i个预测值。 确定模块根据第一预测值到第（M-1）个预测值来识别控制信号中的同步段。

公开(公告)号：US20140204997A1

公开(公告)日：2014-07-24

申请号：US14140847

申请日：2013-12-26

Applicant: MStar Semiconductor, Inc.

Inventor： YOU-TSAI JENG ,  Tai-Lai Tung ,  Tung-Sheng Lin ,  Ching-Fu Lan

IPC: H04N19/30 ,  H04N19/65

CPC classification number: H04L25/067 ,  H04N5/455 ,  H04N21/4382

Abstract: By determining a scaling factor for scaling signals according to a signal having low bit error rates, and by adjusting soft data using the scaling factor, when soft data are simulated using the Gaussian Model having obvious errors with respect to reality, impacts of signals having low bit error rates are effectively amplified so that impacts of signals having high bit error rates are effectively reduced on the contrary. As a result, the obvious errors introduced by using the Gaussian Model and a low broadcast quality of digital television signals caused by said obvious errors can be neutralized.

Abstract translation: 通过根据具有低误码率的信号确定缩放信号的缩放因子，并且通过使用缩放因子调整软数据，当使用具有相对于现实的明显错误的高斯模型来模拟软数据时，具有低的信号的影响 有效地放大了误比特率，从而有效地降低了具有高误码率的信号的影响。 结果，可以消除使用高斯模型引入的明显误差和由所述明显错误引起的数字电视信号的低广播质量。

公开(公告)号：US20140157331A1

公开(公告)日：2014-06-05

申请号：US14094891

申请日：2013-12-03

Applicant: MStar Semiconductor, Inc.

Inventor： Chu-Hsin Chang ,  Kai-Wen Cheng ,  Yi-Ying Liao ,  Tung-Sheng Lin ,  Tai-Lai Tung

IPC: H04N21/61 ,  H04N21/643

CPC classification number: H04N21/6193 ,  H04H20/26 ,  H04H40/90 ,  H04N21/4382 ,  H04N21/4383

Abstract: A channel scanning method for Digital Video Broadcasting—Satellite (DVB-S) signals is provided. The method includes: scanning a radio frequency (RF) signal according to a normal frequency step; when the Nth channel is detected, obtaining a difference between a low boundary of an Nth channel and a high boundary of an (N−1)th channel; and, when the difference is within a predetermined bandwidth range, scanning the RF signal between the high boundary of the (N−1)th channel and the low boundary of the Nth channel according to a narrow frequency step. The normal frequency step is greater than the narrow frequency step.

Abstract translation: 提供了一种用于数字视频广播卫星（DVB-S）信号的频道扫描方法。 该方法包括：根据正常频率步长扫描射频（RF）信号; 当检测到第N个信道时，获得第N个信道的低边界与第（N-1）个信道的高边界之间的差; 并且当所述差在预定带宽范围内时，根据窄频率步长扫描第（N-1）个信道的高边界与第N个信道的低边界之间的RF信号。 正常频率步长大于窄频步长。

公开(公告)号：US09673935B2

公开(公告)日：2017-06-06

申请号：US14138408

申请日：2013-12-23

Applicant: MStar Semiconductor, Inc.

Inventor： You-Tsai Jeng ,  Tai-Lai Tung ,  Tung-Sheng Lin ,  Ching-Fu Lan

IPC: H04N19/89 ,  H04L1/00

CPC classification number: H04L1/0071 ,  H04L1/0047

Abstract: By inserting a symbol start tag at a start of a data segment corresponding to each symbol of a multimedia data stream, and by inserting frame start tags at starts of different frames in a start data segment, data signals belonging to different channels can be precisely and rapidly classified and decoded when the multimedia data stream is performed with demodulation.

公开(公告)号：US09647860B2

公开(公告)日：2017-05-09

申请号：US14140847

申请日：2013-12-26

Applicant: MStar Semiconductor, Inc.

Inventor： You-Tsai Jeng ,  Tai-Lai Tung ,  Tung-Sheng Lin ,  Ching-Fu Lan

IPC: H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04L25/06 ,  H04N5/455 ,  H04N21/438

CPC classification number: H04L25/067 ,  H04N5/455 ,  H04N21/4382

Abstract: By determining a scaling factor for scaling signals according to a signal having low bit error rates, and by adjusting soft data using the scaling factor, when soft data are simulated using the Gaussian Model having obvious errors with respect to reality, impacts of signals having low bit error rates are effectively amplified so that impacts of signals having high bit error rates are effectively reduced on the contrary. As a result, the obvious errors introduced by using the Gaussian Model and a low broadcast quality of digital television signals caused by said obvious errors can be neutralized.

公开(公告)号：US20130318557A1

公开(公告)日：2013-11-28

申请号：US13900821

申请日：2013-05-23

Applicant: MStar Semiconductor, Inc.

Inventor： Kai-Wen Cheng ,  Yi-Ying Liao ,  Tung-Sheng Lin ,  Tai-Lai Tung

IPC: H04N21/61 ,  H04N7/20

CPC classification number: H04N21/6143 ,  H04L27/00 ,  H04L27/0006 ,  H04L27/066 ,  H04N7/20 ,  H04N21/4382

Abstract: An apparatus for detecting spectrum inversion includes a different correlator and a determining module. The differential correlator performs an odd-order differential correlation on an input signal and a known signal to generate a differential correlation result. When the input signal is determined as corresponding to a target signal of the known signal, the determining module detects spectrum inversion in the input signal according to the phase of the differential correlation result.

Abstract translation: 用于检测频谱反转的装置包括不同的相关器和确定模块。 差分相关器对输入信号和已知信号执行奇数阶微分相关，以产生微分相关结果。 当确定输入信号对应于已知信号的目标信号时，确定模块根据微分相关结果的相位来检测输入信号中的频谱反转。

公开(公告)号：US09148309B2

公开(公告)日：2015-09-29

申请号：US14174007

申请日：2014-02-06

Applicant: MStar Semiconductor, Inc.

Inventor： Chun-Chi Su ,  Ching-Fu Lan ,  Chun-Chieh Wang ,  Tai-Lai Tung ,  Tung-Sheng Lin

IPC: H04L27/00 ,  H04L25/02

CPC classification number: H04L25/0204 ,  H04L25/0232

Abstract: An apparatus for estimating channel effects is provided. A receiving module receives first data and first reference information arriving in a first time period, second data and second reference data arriving in a second time period, and third data and third reference data arriving in a third time period. An estimation module estimates channel effects corresponding to the first and third data, and the first, second and third reference data, respectively. A coefficient calculation module performs a Wiener filter coefficient calculation on the channel effects corresponding to the first, second and third reference data to generate a set of time-domain interpolation coefficients. An interpolation module interpolates the channel effects corresponding to the first third data according to the set of time-domain interpolation coefficients to generate a channel effect corresponding to the second data.

Abstract translation: 提供了一种用于估计信道效应的装置。 接收模块接收在第一时间段到达的第一数据和第一参考信息，在第二时间段到达的第二数据和第二参考数据，以及在第三时间段到达的第三数据和第三参考数据。 估计模块分别估计与第一和第三数据以及第一，第二和第三参考数据相对应的信道效应。 系数计算模块对与第一，第二和第三参考数据相对应的信道效应执行维纳滤波系数计算，以生成一组时域插值系数。 内插模块根据时域插值系数的集合内插与第一第三数据对应的信道效应，以产生与第二数据相对应的信道效应。

公开(公告)号：US08931017B2

公开(公告)日：2015-01-06

申请号：US14094891

申请日：2013-12-03

Applicant: MStar Semiconductor, Inc.

Inventor： Chu-Hsin Chang ,  Kai-Wen Cheng ,  Yi-Ying Liao ,  Tung-Sheng Lin ,  Tai-Lai Tung

IPC: H04N7/20 ,  H04N21/61 ,  H04H40/90 ,  H04N21/438 ,  H04H20/26

CPC classification number: H04N21/6193 ,  H04H20/26 ,  H04H40/90 ,  H04N21/4382 ,  H04N21/4383

Abstract: A channel scanning method for Digital Video Broadcasting-Satellite (DVB-S) signals is provided. The method includes: scanning a radio frequency (RF) signal according to a normal frequency step; when the Nth channel is detected, obtaining a difference between a low boundary of an Nth channel and a high boundary of an (N−1)th channel; and, when the difference is within a predetermined bandwidth range, scanning the RF signal between the high boundary of the (N−1)th channel and the low boundary of the Nth channel according to a narrow frequency step. The normal frequency step is greater than the narrow frequency step.

Abstract translation: 提供了一种用于数字视频广播卫星（DVB-S）信号的频道扫描方法。 该方法包括：根据正常频率步长扫描射频（RF）信号; 当检测到第N个信道时，获得第N个信道的低边界与第（N-1）个信道的高边界之间的差; 并且当所述差在预定带宽范围内时，根据窄频率步长扫描第（N-1）个信道的高边界与第N个信道的低边界之间的RF信号。 正常频率步长大于窄频步长。

公开(公告)号：US20130258201A1

公开(公告)日：2013-10-03

申请号：US13845405

申请日：2013-03-18

Applicant: MStar Semiconductor, Inc.

Inventor： Chu-Hsin Chang ,  Kai-Wen Cheng ,  Yi-Ying Liao ,  Tung-Sheng Lin ,  Tai-Lai Tung

IPC: H04N9/67

CPC classification number: H04N9/67 ,  H04H40/90 ,  H04L27/2657 ,  H04L27/2672 ,  H04L27/2688 ,  H04L27/2689 ,  H04N7/20

Abstract: A signal processing apparatus includes an initial detecting module, a mixer, a symbol rate detecting module, a judging module and a correcting module. The initial detecting module determines an initial carrier frequency offset of an input signal according to a spectrum of the input signal. The mixer adjusts the input signal according to the initial carrier frequency offset to generate a frequency-compensated signal. The symbol rate detecting module determines a symbol rate of the input signal. The judging module judges whether the initial carrier frequency offset is correct according to the frequency-compensated signal. When a judgment result of the judging module is negative, the correcting module determines a corrected carrier frequency offset according to the symbol rate and the spectrum.

Abstract translation: 信号处理装置包括初始检测模块，混频器，符号率检测模块，判断模块和校正模块。 初始检测模块根据输入信号的频谱确定输入信号的初始载波频率偏移。 混频器根据初始载波频率偏移调整输入信号，以产生频率补偿信号。 符号率检测模块确定输入信号的符号率。 判断模块根据频率补偿信号判断初始载波频率偏移是否正确。 当判断模块的判断结果为否定时，校正模块根据符号率和频谱确定校正的载波频率偏移。

公开(公告)号：US09131198B2

公开(公告)日：2015-09-08

申请号：US13845405

申请日：2013-03-18

Applicant: MStar Semiconductor, Inc.

Inventor： Chu-Hsin Chang ,  Kai-Wen Cheng ,  Yi-Ying Liao ,  Tung-Sheng Lin ,  Tai-Lai Tung

IPC: H04L27/06 ,  H04N9/67 ,  H04H40/90 ,  H04L27/26 ,  H04N7/20

CPC classification number: H04N9/67 ,  H04H40/90 ,  H04L27/2657 ,  H04L27/2672 ,  H04L27/2688 ,  H04L27/2689 ,  H04N7/20

Abstract: A signal processing apparatus includes an initial detecting module, a mixer, a symbol rate detecting module, a judging module and a correcting module. The initial detecting module determines an initial carrier frequency offset of an input signal according to a spectrum of the input signal. The mixer adjusts the input signal according to the initial carrier frequency offset to generate a frequency-compensated signal. The symbol rate detecting module determines a symbol rate of the input signal. The judging module judges whether the initial carrier frequency offset is correct according to the frequency-compensated signal. When a judgment result of the judging module is negative, the correcting module determines a corrected carrier frequency offset according to the symbol rate and the spectrum.

Abstract translation: 信号处理装置包括初始检测模块，混频器，符号率检测模块，判断模块和校正模块。 初始检测模块根据输入信号的频谱确定输入信号的初始载波频率偏移。 混频器根据初始载波频率偏移调整输入信号，以产生频率补偿信号。 符号率检测模块确定输入信号的符号率。 判断模块根据频率补偿信号判断初始载波频率偏移是否正确。 当判断模块的判断结果为否定时，校正模块根据符号率和频谱确定校正的载波频率偏移。