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1. 发明授权

US08451386B2 Digital intermediate frequency demodulator 有权
标题翻译：数字中频解调器
公开(公告)号：US08451386B2
公开(公告)日：2013-05-28
申请号：US12479912
申请日：2009-06-08
申请人： Tien-Ju Tsai , Pei-Jun Shih
发明人： Tien-Ju Tsai , Pei-Jun Shih
IPC分类号： H04N5/44 , H04N5/455
CPC分类号： H04N5/455 , H04N21/4382
摘要： The invention discloses a digital IF demodulator for processing a digital IF signal converted from a radio frequency (RF) signal, including an NCO, a down conversion circuit, a PIF carrier recovery circuit and a video baseband demodulator. The NCO outputs a sine value and a cosine value. The down conversion circuit outputs a first zero IF signal including a first real part signal and a first imaginary part signal, according to the digital IF signal, the sine value and the cosine value. The PIF carrier recovery circuit outputs a loop error signal for the NCO and a second zero IF signal, according to the first zero IF signal and a video synchronization signal. The video baseband demodulator generates a composite video signal according to the second zero IF signal.
摘要翻译：本发明公开了一种用于处理从包括NCO，下变频电路，PIF载波恢复电路和视频基带解调器的射频（RF）信号转换的数字IF信号的数字IF解调器。 NCO输出正弦值和余弦值。下变频电路根据数字IF信号，正弦值和余弦值输出包括第一实部信号和第一虚部信号的第一零中频信号。 PIF载波恢复电路根据第一零中频信号和视频同步信号输出NCO的环路误差信号和第二零中频信号。视频基带解调器根据第二零IF信号产生复合视频信号。

2. 发明授权

US08261161B2 Method and system of receiving data with enhanced partial matching 有权
标题翻译：用增强的部分匹配接收数据的方法和系统
公开(公告)号：US08261161B2
公开(公告)日：2012-09-04
申请号：US12618953
申请日：2009-11-16
申请人： Tien-Ju Tsai , Cheng-Hsi Hung
发明人： Tien-Ju Tsai , Cheng-Hsi Hung
IPC分类号： G06F11/00
CPC分类号： H04L1/00
摘要： A method and system of receiving data with enhanced partial matching is disclosed. A received word is compared with the frame code to determine mismatch bit(s). Subsequently, a determination is made whether the mismatch bit(s) are at positions of defined critical bits. If the mismatch bit(s) are not critical, the received word is then affirmed.
摘要翻译：公开了一种接收具有增强的部分匹配的数据的方法和系统。将接收的字与帧码进行比较以确定不匹配比特。随后，确定不匹配位是否在定义的关键位的位置。如果不匹配位不重要，则接收到的字被确认。

3. 发明授权

US08237861B2 Video horizontal synchronizer 有权
标题翻译：视频水平同步器
公开(公告)号：US08237861B2
公开(公告)日：2012-08-07
申请号：US12577838
申请日：2009-10-13
申请人： Tien-Ju Tsai
发明人： Tien-Ju Tsai
IPC分类号： H03L7/00
CPC分类号： H04N5/04 , H03L7/0805 , H03L7/081 , H03L7/085 , H03L2207/50
摘要： A video horizontal synchronizer outputting a line timing signal and an indicating flag of a received video signal for use in a video signal post-processing unit, including a filter outputting a wide bandwidth filtered and a narrow bandwidth filtered signals of the received video signal, a dynamic slicer threshold generator generating a slicer threshold, a timing recovery circuit generating a phase error and the line timing signal, a phase error statistics circuit averaging the phase error to generate a average phase error, a HSYNC checker generating a matching flag indicating whether a periodic pattern appears in the narrow bandwidth filtered signal according to the line timing signal, and a finite state machine controlling the dynamic slicer threshold generator, the timing recovery circuit, the phase error statistics circuit and the HSYNC checker and generating an indicating flag when the average phase error is small enough and the matching flag is confirmed.
摘要翻译：输出用于视频信号后处理单元的接收视频信号的行定时信号和指示标志的视频水平同步器，包括输出接收到的视频信号的宽带宽滤波信号和窄带宽滤波信号的滤波器，产生切片器阈值的动态切片器阈值生成器，产生相位误差的定时恢复电路和线路定时信号;相位误差统计电路，对相位误差进行平均以产生平均相位误差; HSYNC检查器，产生指示周期性模式根据线路定时信号出现在窄带宽滤波信号中，有限状态机控制动态限幅器阈值发生器，定时恢复电路，相位误差统计电路和HSYNC检验器，并且当平均相位错误足够小，并且确认了匹配标志。

4. 发明授权

US08090110B2 Method and apparatus for determining sound standard for input sound signal 有权
标题翻译：用于确定输入声音信号的声音标准的方法和装置
公开(公告)号：US08090110B2
公开(公告)日：2012-01-03
申请号：US12081745
申请日：2008-04-21
申请人： Tien-Ju Tsai , Shih-Chuan Lu , Shu-Ming Liu
发明人： Tien-Ju Tsai , Shih-Chuan Lu , Shu-Ming Liu
IPC分类号： H04R29/00
CPC分类号： H04N5/60 , H04N5/46 , H04N21/4394
摘要： A method for determining a sound standard for an input sound signal includes the following steps. Firstly, the input sound signal is filtered to obtain a first filtered signal corresponding to a first frequency and a second filtered signal corresponding to a second frequency. Next, the first filtered signal is frequency-demodulated to obtain a first demodulated filtered signal, and whether the input sound signal contains a FM analog component corresponding to the first frequency is determined accordingly. Next, the second filtered signal is decoded according to a digital sound standard to obtain a bit stream. Then, the bit steam is interpreted according to the digital sound standard, and whether the input sound contains a digital component corresponding to the digital sound standard is determined accordingly. Then, whether the input sound signal matches one of known sound standards is determined based on the determined results above.
摘要翻译：用于确定输入声音信号的声音标准的方法包括以下步骤。首先，对输入声音信号进行滤波以获得对应于第一频率的第一滤波信号和对应于第二频率的第二滤波信号。接下来，对第一滤波信号进行频率解调以获得第一解调滤波信号，并且相应地确定输入声音信号是否包含与第一频率相对应的FM模拟分量。接下来，根据数字声音标准对第二滤波信号进行解码以获得比特流。然后，根据数字声音标准解释位蒸汽，并且相应地确定输入声音是否包含与数字声音标准相对应的数字分量。然后，基于上述确定的结果来确定输入声音信号是否与已知声音标准中的一个匹配。

5. 发明申请

US20090310791A1 METHOD FOR PROCESSING AN INPUT COMPOSITE SIGNAL AND SIGNAL PROCESSING APPARATUS THEREOF 有权
标题翻译：用于处理输入复合信号的方法及其信号处理装置
公开(公告)号：US20090310791A1
公开(公告)日：2009-12-17
申请号：US12141073
申请日：2008-06-17
申请人： Tien-Ju Tsai , Chih-Feng Lin
发明人： Tien-Ju Tsai , Chih-Feng Lin
IPC分类号： H04H20/48
CPC分类号： H04N5/60 , H04H40/81 , H04N21/4305 , H04N21/439 , H04N21/4394
摘要： A method for processing an input composite signal includes tracking a signal component of the input composite signal according to a frequency of a pilot signal to generate a locked signal, detecting an amplitude of the signal component to generate a detecting result, and generating a reproduced pilot signal according to the detecting result and the locked signal. A frequency and a phase of the locked signal are substantially identical to the frequency and a phase of the pilot signal.
摘要翻译：一种处理输入复合信号的方法包括根据导频信号的频率跟踪输入的复合信号的信号分量，以产生锁定信号，检测信号分量的振幅以产生检测结果，并产生再现的导频信号根据检测结果和锁定信号。锁定信号的频率和相位基本上与导频信号的频率和相位相同。

6. 发明授权

US08184212B2 Sound intermediate frequency demodulator and sound intermediate frequency detecting method thereof 有权
标题翻译：声音中频解调器及其声频中频检测方法
公开(公告)号：US08184212B2
公开(公告)日：2012-05-22
申请号：US12510270
申请日：2009-07-28
申请人： Shih-Chuan Lu , Tien-Ju Tsai , Yen-Ming Lin
发明人： Shih-Chuan Lu , Tien-Ju Tsai , Yen-Ming Lin
IPC分类号： H04N5/60 , H04N7/00
CPC分类号： H04N5/60 , H04N5/605
摘要： A sound-IF demodulator including a first demodulating unit and a second demodulating unit and a sound-IF detecting method thereof are provided. A sound de-matrix unit is adapted to generate a driving signal by de-matrixing outputs of the sound-IF demodulator. The first demodulating unit generates a first demodulated signal to the sound de-matrix unit by demodulating the first carrier signal. The second demodulating unit detects the signal quality of the sound signal and generates a second demodulated signal to the sound de-matrix unit and/or the first demodulating unit by demodulating the second carrier signal. When the second demodulating unit is idle, the second demodulating unit is programmed to select a corresponding standard among a plurality of predetermined standards for the sound signal according to the signal quality of the sound signal, so that the sound-IF demodulator is programmed to demodulate the sound signal in the corresponding standard.
摘要翻译：提供了包括第一解调单元和第二解调单元以及声音IF检测方法的声音中频解调器。声音解矩阵单元适于通过对声 - IF解调器的输出进行去矩阵化来产生驱动信号。第一解调单元通过对第一载波信号进行解调来生成对声音去矩阵单元的第一解调信号。第二解调单元检测声音信号的信号质量，并通过对第二载波信号进行解调来产生第二解调信号给声音去矩阵单元和/或第一解调单元。当第二解调单元空闲时，第二解调单元被编程为根据声音信号的信号质量在声音信号的多个预定标准中选择相应的标准，使得声IF解调器被编程为解调声音信号在相应的标准。

7. 发明授权

US07937053B2 Method for receiving station signal and receiver for receiving the same 有权
标题翻译：接收台站信号和接收机的方法
公开(公告)号：US07937053B2
公开(公告)日：2011-05-03
申请号：US11808290
申请日：2007-06-08
申请人： Tien-Ju Tsai , Shu-Ming Liu
发明人： Tien-Ju Tsai , Shu-Ming Liu
IPC分类号： H04B1/18
CPC分类号： H04N5/50 , H04N21/4382 , H04N21/4383
摘要： A method for receiving a station signal is provided. First, a radio frequency signal is received and converted to a first IF signal. Next, the first IF signal is demodulated to a baseband signal and a demodulation signal is obtained, the demodulation signal being a result of differentiating a phase of the baseband signal. Then a determination as to whether a DC level of the demodulation signal has an S-curve characteristic at a specific frequency is made according to the demodulation signal. If so, the specific frequency is determined as a first station frequency, a first station signal is obtained from the radio frequency signal according to the first station frequency.
摘要翻译：提供一种接收站信号的方法。首先，接收射频信号并将其转换为第一IF信号。接下来，将第一IF信号解调为基带信号并获得解调信号，解调信号是对基带信号的相位进行微分的结果。然后根据解调信号确定解调信号的DC电平是否具有特定频率的S曲线特性。如果是，则将特定频率确定为第一站频率，根据第一站频率从射频信号获得第一站信号。

8. 发明申请

US20100182053A1 SINE/COSINE VALUE GENERATION APPARATUS 有权
标题翻译： SINE / COSINE VALUE GENERATION APPARATUS
公开(公告)号：US20100182053A1
公开(公告)日：2010-07-22
申请号：US12355845
申请日：2009-01-19
申请人： Tien-Ju Tsai
发明人： Tien-Ju Tsai
IPC分类号： H03B21/00 , H03B28/00
CPC分类号： G06F1/0353
摘要： An apparatus for generating sine/cosine values of an input phase is disclosed. The apparatus includes a phase projector, an LUT-arithmetic unit, a temp sine/cosine generator and a sine/cosine value generator. The phase projector maps the input phase angle into an octant phase and determines an octant index indicating which octant the input phase angle actually locates and a flag indicating whether or not the input phase happens to be pi/4, 3*pi/4, 5*pi/4 or 7*pi/4. The LUT-arithmetic unit receives the octant phase for provision of its corresponding sine/cosine values. The temp sine/cosine generator receives the corresponding sine/cosine values of the octant phase for provision of temp sine/cosine values based on the flag. The sine/cosine value generator selectively swaps and inverts the temp sine/cosine values as the sine/cosine values of the input phase based on a swap index derived from the octant index.
摘要翻译：公开了一种用于产生输入相位的正弦/余弦值的装置。该装置包括相位投影仪，LUT运算单元，正弦/余弦发生器和正弦/余弦值发生器。相位投影仪将输入相位角映射为八分圆相位，并确定指示输入相位角实际位于哪个八分圆的八分圆指数，以及指示输入相位是否恰好为π/ 4,3 * pi / 4,5 * pi / 4或7 * pi / 4。 LUT运算单元接收用于提供其对应的正弦/余弦值的八分圆相位。温度正弦/余弦发生器接收八分相的相应正弦/余弦值，以根据标志提供温度正弦/余弦值。正弦/余弦值发生器基于从八分圆索引导出的交换索引选择性地将温度正弦/余弦值交换和反转为输入相的正弦/余弦值。

9. 发明申请

US20100111240A1 Method to Track a Target Frequency of an Input Signal 有权
标题翻译：跟踪输入信号目标频率的方法
公开(公告)号：US20100111240A1
公开(公告)日：2010-05-06
申请号：US12264985
申请日：2008-11-05
申请人： Pei-Jun Shih , Tien-Ju Tsai , Jeng-Shiann Jiang
发明人： Pei-Jun Shih , Tien-Ju Tsai , Jeng-Shiann Jiang
IPC分类号： H03D3/24
CPC分类号： H03D3/007 , H03D3/004
摘要： A digital demodulator adapted in a receiver and a digital demodulation method are provided. The digital demodulator comprises: a phase splitter, a complex multiplier, an AFC, a limiter, a phase detector, a re-tracker, a post-multiplier and an oscillator. The phase splitter generates a complex signal from the input signal. The complex multiplier multiplies the complex signal by both first and second phase signals to generate first and second base band signals. The AFC generates a first output signal. The limiter generates a trend signal and the re-tracker generates a tuning signal from the first output signal. The phase detector multiplies the trend and second base signal and adjusts the multiplied signal based on the tuning signal. The oscillator generates the first and second phase signals according to the output of the phase detector. The post-multiplier multiplies the trend signal by the first and second base band signals for output.
摘要翻译：提供一种适用于接收机的数字解调器和数字解调方法。数字解调器包括：分相器，复数乘法器，AFC，限幅器，相位检测器，重新跟踪器，后乘法器和振荡器。相位分离器从输入信号产生复信号。复数乘法器将复信号乘以第一和第二相位信号，以产生第一和第二基带信号。 AFC产生第一个输出信号。限幅器产生趋势信号，重新跟踪器从第一个输出信号产生一个调谐信号。相位检测器将趋势和第二基准信号相乘，并根据调谐信号调整相乘的信号。振荡器根据相位检测器的输出产生第一和第二相位信号。后乘法器将趋势信号乘以第一和第二基带信号用于输出。

10. 发明申请

US20090175385A1 Tolerable Synchronization Circuit of RDS Receiver 有权
标题翻译： RDS接收机的容限同步电路
公开(公告)号：US20090175385A1
公开(公告)日：2009-07-09
申请号：US11968659
申请日：2008-01-03
申请人： Tien-Ju Tsai , Chih-Feng Lin , Shih-Chuan Lu
发明人： Tien-Ju Tsai , Chih-Feng Lin , Shih-Chuan Lu
IPC分类号： H04L27/22
CPC分类号： H04H40/18 , H04H2201/13
摘要： A Radio Data System (RDS) decoder circuit determines a subcarrier frequency utilizing only a 57 kHz RDS signal of an FM broadcast signal. The RDS decoder includes a zero-intermediate frequency (zero-IF) FM demodulator, a first mixer, a low-pass filter (LPF) unit, a shaping filter unit, a carrier recovery circuit, a digitally controlled oscillator (DCO), a symbol timing recovery circuit, an integrate and dump circuit, a slicer 280, and a differential decoder. The carrier recovery circuit includes a phase error detector and a digital loop filter (DLF). The symbol timing recovery circuit includes a zero-crossing detector, a phase detector and loop filter unit, and a counter.
摘要翻译：无线电数据系统（RDS）解码器电路仅使用FM广播信号的57kHz RDS信号来确定副载波频率。 RDS解码器包括零中频（零中频）FM解调器，第一混频器，低通滤波器（LPF）单元，整形滤波器单元，载波恢复电路，数字振荡器（DCO），数字控制振荡器符号定时恢复电路，集成和转储电路，限幅器280和差分解码器。载波恢复电路包括相位误差检测器和数字环路滤波器（DLF）。符号定时恢复电路包括过零检测器，相位检测器和环路滤波器单元以及计数器。

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