公开(公告)号：US07460174B2

公开(公告)日：2008-12-02

申请号：US11160557

申请日：2005-06-29

申请人： Wei-Ting Wang ,  Cheng-Yi Huang ,  Bao-Chi Peng

发明人： Wei-Ting Wang ,  Cheng-Yi Huang ,  Bao-Chi Peng

IPC分类号： H04N5/08 ,  H04L7/00

CPC分类号： H04N5/08

摘要： A synchronization signal detector includes: a first circuit configured to delay the data signal by a period of at least one data segment of the data signal to generate a delayed signal; a second circuit configured to produce a plurality of similarity signals according to the data signal and the delayed signal, each of the similarity signals representing the similarity between the data signal and the delayed signal, and a third circuit configured to determine the synchronization signal of the data signal according to the similarity signals. The present invention further provides a method corresponding to the signal detector.

摘要翻译： 同步信号检测器包括：第一电路，被配置为将数据信号延迟数据信号的至少一个数据段的周期以产生延迟信号; 第二电路，被配置为根据数据信号和延迟信号产生多个相似度信号，每个相似度信号表示数据信号和延迟信号之间的相似度，以及第三电路，被配置为确定 数据信号根据相似度信号。 本发明还提供了一种对应于信号检测器的方法。

公开(公告)号：US07218359B2

公开(公告)日：2007-05-15

申请号：US10710635

申请日：2004-07-26

申请人： Bao-Chi Peng ,  Cheng-Yi Huang ,  Wei-Ting Wang

发明人： Bao-Chi Peng ,  Cheng-Yi Huang ,  Wei-Ting Wang

IPC分类号： H04N5/44 ,  H04N5/50 ,  H04L27/00 ,  H04B1/06

CPC分类号： H03J1/0008 ,  H04N5/4401 ,  H04N5/50 ,  H04N21/42607 ,  H04N21/4382

摘要： A digital television receiver includes a tuner for down-converting an incoming signal to produce a down-converted signal according to a local oscillator signal corresponding to a selected channel. A filter is coupled to the tuner for filtering the down-converted signal to produce an intermediate frequency (IF) signal. A carrier recovery unit is coupled to the filter for locking to a carrier frequency of the IF signal, and a pre-shift unit is coupled to the tuner. By shifting the local oscillator signal in a first direction by a predetermined first frequency shift in a first phase of carrier recovery, and then by shifting the local oscillator signal in a second direction by a second frequency shift in a second phase of carrier recovery, the pre-shift unit ensures a pilot tone of a selected channel is not filtered from the down-converted signal by the filter.

摘要翻译： 数字电视接收机包括调谐器，用于根据对应于所选频道的本地振荡器信号对输入信号进行下变频以产生下变频信号。 滤波器耦合到调谐器以对下变频信号进行滤波以产生中频（IF）信号。 载波恢复单元耦合到滤波器，用于锁定IF信号的载波频率，并且预移位单元耦合到调谐器。 通过在载波恢复的第一阶段中将第一方向上的本地振荡器信号移位预定的第一频移，然后在载波恢复的第二阶段中将本地振荡器信号在第二方向上移位第二频移， 预移位单元确保所选频道的导频音不被滤波器从经下变频的信号滤波。

公开(公告)号：US07460147B2

公开(公告)日：2008-12-02

申请号：US11160553

申请日：2005-06-28

申请人： Wei-Ting Wang ,  Cheng-Yi Huang ,  Bao-Chi Peng

发明人： Wei-Ting Wang ,  Cheng-Yi Huang ,  Bao-Chi Peng

IPC分类号： H04N5/38

CPC分类号： H04N5/211 ,  H04N5/4401

摘要： An interference detecting circuit for use in an ATSC system and for detecting interference of an ATSC signal includes: a buffering module for delaying to output a first PN63 synchronization format data when receiving the first PN63 synchronization format data; a correlation arithmetic circuit coupled to the buffering module for receiving the ATSC signal and performing a correlation operation on a second PN63 synchronization format data and the delayed first PN63 synchronization format data to output a detection signal when receiving the second PN63 synchronization format data; and a determining circuit for determining whether performing interference rejection on the ATSC signal or not according to the result of the above-mentioned correlation operation.

摘要翻译： 用于ATSC系统并用于检测ATSC信号的干扰的干扰检测电路包括：缓冲模块，用于在接收到第一PN63同步格式数据时延迟输出第一PN63同步格式数据; 耦合到所述缓冲模块的相关运算电路，用于接收所述ATSC信号，并且对第二PN63同步格式数据和所述延迟的第一PN63同步格式数据执行相关操作，以在接收到所述第二PN63同步格式数据时输出检测信号; 以及确定电路，用于根据上述相关操作的结果确定是否对ATSC信号执行干扰抑制。

公开(公告)号：US07554609B2

公开(公告)日：2009-06-30

申请号：US10905933

申请日：2005-01-27

申请人： Wei-Ting Wang ,  Cheng-Yi Huang ,  Bao-Chi Peng

发明人： Wei-Ting Wang ,  Cheng-Yi Huang ,  Bao-Chi Peng

IPC分类号： H04N5/00 ,  H04N5/28 ,  H04N7/04 ,  H04N9/64 ,  H04N5/50 ,  H04N5/14 ,  H04N5/44

CPC分类号： H04B1/1036

摘要： A method and apparatus for rejecting an interference signal from an input frequency spectrum. The method includes the steps of receiving the input signal; frequency-shifting the received input signal by a first frequency-shifting amount; and filtering the frequency-shifted input signal to filter out the interference component from the input signal.

摘要翻译： 一种用于拒绝来自输入频谱的干扰信号的方法和装置。 该方法包括接收输入信号的步骤; 将所接收的输入信号频移第一频移量; 对频移输入信号进行滤波，从输入信号滤除干扰分量。

公开(公告)号：US20060023810A1

公开(公告)日：2006-02-02

申请号：US10710783

申请日：2004-08-02

申请人： Cheng-Yi Huang ,  Bao-Chi Peng ,  Wei-Ting Wang

发明人： Cheng-Yi Huang ,  Bao-Chi Peng ,  Wei-Ting Wang

IPC分类号： H04L27/22

CPC分类号： H04L25/061 ,  H04L27/066 ,  H04L2027/0028 ,  H04L2027/0057

摘要： A carrier recovery system includes an in-phase mixer for mixing an incoming signal with an in-phase reference signal to produce an in-phase baseband signal; a quadrature-phase mixer for mixing the incoming signal with a quadrature-phase reference signal to produce a quadrature-phase baseband signal; a DC detector for measuring a DC offset of the quadrature-phase baseband signal; and a frequency synthesizer for generating the in-phase reference signal and the quadrature-phase reference signal according to the DC offset measured by the DC detector. The quadrature-phase reference signal is the in-phase reference signal phase-delayed by ninety degrees. The DC offset of the quadrature-phase baseband signal is caused by a pilot tone of the VSB signal for a selected carrier in an Advanced Television Systems Committee (ATSC) digital television (DTV) receiver. By minimizing the DC offset, the carrier recover system locks the quadrature-phase reference signal and the in-phase reference signal to the selected channel.

摘要翻译： 载波恢复系统包括同步混频器，用于将输入信号与同相参考信号混频以产生同相基带信号; 正交相位混频器，用于将输入信号与正交相位参考信号混频以产生正交相位基带信号; DC检测器，用于测量正交相位基带信号的DC偏移; 以及用于根据由DC检测器测量的DC偏移产生同相参考信号和正交参考信号的频率合成器。 正交参考信号是相位延迟90度的同相参考信号。 正交相位基带信号的直流偏移由高级电视系统委员会（ATSC）数字电视（DTV）接收机中的所选载波的VSB信号的导频音引起。 通过最小化DC偏移，载波恢复系统将正交参考信号和同相参考信号锁定到所选通道。

公开(公告)号：US20060018409A1

公开(公告)日：2006-01-26

申请号：US10710635

申请日：2004-07-26

申请人： Bao-Chi Peng ,  Cheng-Yi Huang ,  Wei-Ting Wang

发明人： Bao-Chi Peng ,  Cheng-Yi Huang ,  Wei-Ting Wang

IPC分类号： H04L27/22 ,  H04N5/50

CPC分类号： H03J1/0008 ,  H04N5/4401 ,  H04N5/50 ,  H04N21/42607 ,  H04N21/4382

摘要： A digital television receiver includes a tuner for down-converting an incoming signal to produce a down-converted signal according to a local oscillator signal corresponding to a selected channel. A filter is coupled to the tuner for filtering the down-converted signal to produce an intermediate frequency (IF) signal. A carrier recovery unit is coupled to the filter for locking to a carrier frequency of the IF signal, and a pre-shift unit is coupled to the tuner. By shifting the local oscillator signal in a first direction by a predetermined first frequency shift in a first phase of carrier recovery, and then by shifting the local oscillator signal in a second direction by a second frequency shift in a second phase of carrier recovery, the pre-shift unit ensures a pilot tone of a selected channel is not filtered from the down-converted signal by the filter.

摘要翻译： 数字电视接收机包括调谐器，用于根据对应于所选频道的本地振荡器信号对输入信号进行下变频以产生下变频信号。 滤波器耦合到调谐器以对下变频信号进行滤波以产生中频（IF）信号。 载波恢复单元耦合到滤波器，用于锁定IF信号的载波频率，并且预移位单元耦合到调谐器。 通过在载波恢复的第一阶段中将第一方向上的本地振荡器信号移位预定的第一频移，然后在载波恢复的第二阶段中将本地振荡器信号在第二方向上移位第二频移， 预移位单元确保所选频道的导频音不被滤波器从经下变频的信号滤波。

公开(公告)号：US20060007299A1

公开(公告)日：2006-01-12

申请号：US11160553

申请日：2005-06-28

申请人： Wei-Ting Wang ,  Cheng-Yi Huang ,  Bao-Chi Peng

发明人： Wei-Ting Wang ,  Cheng-Yi Huang ,  Bao-Chi Peng

IPC分类号： H04N5/38

CPC分类号： H04N5/211 ,  H04N5/4401

摘要： An interference detecting circuit for use in an ATSC system and for detecting interference of an ATSC signal includes: a buffering module for delaying to output a first PN63 synchronization format data when receiving the first PN63 synchronization format data; a correlation arithmetic circuit coupled to the buffering module for receiving the ATSC signal and performing a correlation operation on a second PN63 synchronization format data and the delayed first PN63 synchronization format data to output a detection signal when receiving the second PN63 synchronization format data; and a determining circuit for determining whether performing interference rejection on the ATSC signal or not according to the result of the above-mentioned correlation operation.

摘要翻译： 用于ATSC系统并用于检测ATSC信号的干扰的干扰检测电路包括：缓冲模块，用于在接收到第一PN63同步格式数据时延迟输出第一PN63同步格式数据; 耦合到所述缓冲模块的相关运算电路，用于接收所述ATSC信号，并且对第二PN63同步格式数据和所述延迟的第一PN63同步格式数据执行相关操作，以在接收到所述第二PN63同步格式数据时输出检测信号; 以及确定电路，用于根据上述相关操作的结果确定是否对ATSC信号执行干扰抑制。

公开(公告)号：US20060001769A1

公开(公告)日：2006-01-05

申请号：US11160557

申请日：2005-06-29

申请人： Wei-Ting Wang ,  Cheng-Yi Huang ,  Bao-Chi Peng

发明人： Wei-Ting Wang ,  Cheng-Yi Huang ,  Bao-Chi Peng

IPC分类号： H04N5/08

CPC分类号： H04N5/08

摘要： A synchronization signal detector includes: a first circuit configured to delay the data signal by a period of at least one data segment of the data signal to generate a delayed signal; a second circuit configured to produce a plurality of similarity signals according to the data signal and the delayed signal, each of the similarity signals representing the similarity between the data signal and the delayed signal, and a third circuit configured to determine the synchronization signal of the data signal according to the similarity signals. The present invention further provides a method corresponding to the signal detector.

摘要翻译： 同步信号检测器包括：第一电路，被配置为将数据信号延迟数据信号的至少一个数据段的周期以产生延迟信号; 第二电路，被配置为根据数据信号和延迟信号产生多个相似度信号，每个相似度信号表示数据信号和延迟信号之间的相似度，以及第三电路，被配置为确定 数据信号根据相似度信号。 本发明还提供了一种对应于信号检测器的方法。

公开(公告)号：US07406137B2

公开(公告)日：2008-07-29

申请号：US10710783

申请日：2004-08-02

申请人： Cheng-Yi Huang ,  Bao-Chi Peng ,  Wei-Ting Wang

发明人： Cheng-Yi Huang ,  Bao-Chi Peng ,  Wei-Ting Wang

IPC分类号： H04L27/14 ,  H04L27/16 ,  H04L27/22

CPC分类号： H04L25/061 ,  H04L27/066 ,  H04L2027/0028 ,  H04L2027/0057

摘要： A carrier recovery system includes an in-phase mixer for mixing an incoming signal with an in-phase reference signal to produce an in-phase baseband signal; a quadrature-phase mixer for mixing the incoming signal with a quadrature-phase reference signal to produce a quadrature-phase baseband signal; a DC detector for measuring a DC offset of the quadrature-phase baseband signal; and a frequency synthesizer for generating the in-phase reference signal and the quadrature-phase reference signal according to the DC offset measured by the DC detector. The quadrature-phase reference signal is the in-phase reference signal phase-delayed by ninety degrees. The DC offset of the quadrature-phase baseband signal is caused by a pilot tone of the VSB signal for a selected carrier in an Advanced Television Systems Committee (ATSC) digital television (DTV) receiver. By minimizing the DC offset, the carrier recover system locks the quadrature-phase reference signal and the in-phase reference signal to the selected channel.

摘要翻译： 载波恢复系统包括同步混频器，用于将输入信号与同相参考信号混频以产生同相基带信号; 正交相位混频器，用于将输入信号与正交相位参考信号混频以产生正交相位基带信号; DC检测器，用于测量正交相位基带信号的DC偏移; 以及用于根据由DC检测器测量的DC偏移产生同相参考信号和正交参考信号的频率合成器。 正交参考信号是相位延迟90度的同相参考信号。 正交相位基带信号的直流偏移由高级电视系统委员会（ATSC）数字电视（DTV）接收机中的所选载波的VSB信号的导频音引起。 通过最小化DC偏移，载波恢复系统将正交参考信号和同相参考信号锁定到所选通道。

公开(公告)号：US20060164554A1

公开(公告)日：2006-07-27

申请号：US10905933

申请日：2005-01-27

申请人： Wei-Ting Wang ,  Cheng-Yi Huang ,  Bao-Chi Peng

发明人： Wei-Ting Wang ,  Cheng-Yi Huang ,  Bao-Chi Peng

IPC分类号： H03D1/04 ,  H04B1/10

CPC分类号： H04B1/1036

摘要： A method and apparatus for rejecting an interference signal from an input frequency spectrum. The method includes the steps of receiving the input signal; frequency-shifting the received input signal by a first frequency-shifting amount; and filtering the frequency-shifted input signal to filter out the interference component from the input signal.

摘要翻译： 一种用于拒绝来自输入频谱的干扰信号的方法和装置。 该方法包括接收输入信号的步骤; 将所接收的输入信号频移第一频移量; 对频移输入信号进行滤波，从输入信号滤除干扰分量。