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1. 发明申请

US20210168344A1 IMAGE CAPTURING DEVICE AND METHOD 有权
公开(公告)号：US20210168344A1
公开(公告)日：2021-06-03
申请号：US16853770
申请日：2020-04-21
申请人： Yumin Lee , Min-Chen Ho , Sheng-Chung Lai
发明人： Yumin Lee , Min-Chen Ho , Sheng-Chung Lai
IPC分类号： H04N9/64 , H04N5/235 , H04N9/69
摘要： The disclosure provides an image capturing device and an image capturing method. The image capturing device includes a tone mapping circuit, a color correction circuit, and a color gamut mapping circuit. The tone mapping circuit obtains a first image including a first pixel and performs a tone mapping operation to obtain a brightness adjustment parameter, where the first pixel includes a plurality of first color channels. The color correction circuit converts the first color channels into a plurality of second color channels based on the brightness adjustment parameter and the brightness of the first pixel. The color gamut mapping circuit performs a color gamut mapping operation on the second color channels to convert the second color channels into a plurality of third color channels, and outputs a second image, where the second image includes the second pixel characterized by the third color channels.

2. 发明授权

US11184593B2 Image capturing device and method 有权
公开(公告)号：US11184593B2
公开(公告)日：2021-11-23
申请号：US16853770
申请日：2020-04-21
申请人： Yumin Lee , Min-Chen Ho , Sheng-Chung Lai
发明人： Yumin Lee , Min-Chen Ho , Sheng-Chung Lai
IPC分类号： H04N9/64 , H04N9/69 , H04N5/235
摘要： The disclosure provides an image capturing device and an image capturing method. The image capturing device includes a tone mapping circuit, a color correction circuit, and a color gamut mapping circuit. The tone mapping circuit obtains a first image including a first pixel and performs a tone mapping operation to obtain a brightness adjustment parameter, where the first pixel includes a plurality of first color channels. The color correction circuit converts the first color channels into a plurality of second color channels based on the brightness adjustment parameter and the brightness of the first pixel. The color gamut mapping circuit performs a color gamut mapping operation on the second color channels to convert the second color channels into a plurality of third color channels, and outputs a second image, where the second image includes the second pixel characterized by the third color channels.

3. 发明授权

US06823026B2 Apparatus and method for baseband detection 有权
标题翻译：用于基带检测的装置和方法
公开(公告)号：US06823026B2
公开(公告)日：2004-11-23
申请号：US09755833
申请日：2001-01-05
申请人： Bruce D. Mueller , Yumin Lee
发明人： Bruce D. Mueller , Yumin Lee
IPC分类号： H03D322
CPC分类号： H03D1/2245 , H04L27/14 , H04L27/22
摘要： A baseband detector includes a complex differential detector, a constellation point computer, and a phase shift keying (PSK) decoder. The complex differential detector outputs complex values in response to digitized samples derived from a received baseband signal. The PSK decoder generates decoded bits representing information symbols by determining in minimum distance between the complex values and plural constellation points provided by the constellation point computer. The constellation point computer can adaptively generate the constellation points based on a training sequence of information symbols and their corresponding complex valued outputs from the complex differential detector. The baseband detector can be used for frequency shifting keying (FSK) and differential phase shift keying (DPSK) demodulation in direct conversion receivers (DCRs).
摘要翻译：基带检测器包括复差分检测器，星座点计算机和相移键控（PSK）解码器。复差分检测器响应于从接收的基带信号导出的数字化样本输出复数值。 PSK解码器通过确定复数值与星座点计算机提供的多个星座点之间的最小距离来产生表示信息符号的解码比特。星座点计算机可以基于信号符号的训练序列及其对应的复值差分检测器的复值输出，自适应地生成星座点。基带检测器可用于直接转换接收机（DCR）中的频移键控（FSK）和差分相移键控（DPSK）解调。

4. 发明授权

US07313195B2 PAPR reduction method using bit reallocation 有权
标题翻译： PAPR缩减方法使用位重新分配
公开(公告)号：US07313195B2
公开(公告)日：2007-12-25
申请号：US10773179
申请日：2004-02-09
申请人： Yen-lun Chen , Yumin Lee , Shih-Kai Lee
发明人： Yen-lun Chen , Yumin Lee , Shih-Kai Lee
IPC分类号： H04K1/02
CPC分类号： H04L27/2614 , H04L27/2608
摘要： A PAPR reduction method using bit reallocation is disclosed, which is applied in a multi-carrier system. The lowest total transmission power P is achieved by a bit loading algorithm conditioned on the requirement of total D transmission bits per block. When the PAPR (peak to average power ratio) of the block is larger than a predetermined value A, the bit reallocation is performed to add Δd-bit transmitting data to one sub-carrier and subtract Δd-bit transmitting data from another sub-carrier, thereby continuing bit reallocation until the PAPR meets with the system requirement or an iteration number reaches a predetermined maximal number of iteration L.
摘要翻译：公开了一种使用位重新分配的PAPR缩减方法，其应用于多载波系统中。最低总传输功率P通过位加载算法来实现，该算法以每块的总D传输比特的要求为条件。当块的PAPR（峰值与平均功率比）大于预定值A时，执行位重新分配，以将Deltad-bit发送数据添加到一个副载波，并从另一个副载波中减去Deltad-bit发送数据从而继续比特重新分配，直到PAPR满足系统要求或迭代次数达到预定的最大迭代次数L.

5. 发明申请

US20050018702A1 PAPR reduction method using bit reallocation 有权
标题翻译： PAPR缩减方法使用位重新分配
公开(公告)号：US20050018702A1
公开(公告)日：2005-01-27
申请号：US10773179
申请日：2004-02-09
申请人： Yen-Iun Chen , Yumin Lee , Shih-Kai Lee
发明人： Yen-Iun Chen , Yumin Lee , Shih-Kai Lee
IPC分类号： H04B7/005 , H04L12/28 , H04L27/26
CPC分类号： H04L27/2614 , H04L27/2608
摘要： A PAPR reduction method using bit reallocation is disclosed, which is applied in a multi-carrier system. The lowest total transmission power P is achieved by a bit loading algorithm conditioned on the requirement of total D transmission bits per block. When the PAPR (peak to average power ratio) of the block is larger than a predetermined value A, the bit reallocation is performed to add Δd-bit transmitting data to one sub-carrier and subtract Δd-bit transmitting data from another sub-carrier, thereby continuing bit reallocation until the PAPR meets with the system requirement or an iteration number reaches a predetermined maximal number of iteration L.
摘要翻译：公开了一种使用位重新分配的PAPR缩减方法，其应用于多载波系统中。最低总传输功率P通过位加载算法来实现，该算法以每块的总D传输比特的要求为条件。当块的PAPR（峰值与平均功率比）大于预定值A时，执行位重新分配，以将Deltad-bit发送数据添加到一个副载波，并从另一个副载波中减去Deltad-bit发送数据从而继续比特重新分配，直到PAPR满足系统要求或迭代次数达到预定的最大迭代次数L.

6. 发明授权

US07756222B2 Adaptive quantization method and apparatus for an OFDM receiver 有权
标题翻译： OFDM接收机的自适应量化方法和装置
公开(公告)号：US07756222B2
公开(公告)日：2010-07-13
申请号：US11381625
申请日：2006-05-04
申请人： Jeng-Hong Chen , Yumin Lee , Yuh-Chun Lin
发明人： Jeng-Hong Chen , Yumin Lee , Yuh-Chun Lin
IPC分类号： H04L27/00
CPC分类号： H04L27/2647 , H04L25/067 , H04L27/0008
摘要： A quadrature frequency division multiplexing (“OFDM”) wireless receiver, including methods and devices for adaptive quantization of OFDM signals according to modulation and coding schemes and sub-carrier frequency responses, is provided. Efficient quantization may be utilized to reduce the large dynamic range of signals to achieve circuit simplification and chip area reduction. In one embodiment, a quantization circuit includes a quantization selector to select quantization thresholds according to modulation and coding schemes and sub-carrier frequency responses, and a non-uniform quantizer to reduce input dynamic range so that an output is represented by fewer bits than an input.
摘要翻译：提供了一种正交频分复用（“OFDM”）无线接收机，包括用于根据调制和编码方案以及子载波频率响应的OFDM信号的自适应量化的方法和装置。可以利用高效量化来减小信号的大动态范围，以实现电路简化和芯片面积减小。在一个实施例中，量化电路包括量化选择器，以根据调制和编码方案和子载波频率响应来选择量化阈值，以及不均匀量化器，以减少输入动态范围，使得输出由比输入。

7. 发明申请

US20070258531A1 Adaptive Quantization Method and Apparatus For An OFDM Receiver 有权
标题翻译： OFDM接收机的自适应量化方法和装置
公开(公告)号：US20070258531A1
公开(公告)日：2007-11-08
申请号：US11381625
申请日：2006-05-04
申请人： Jeng-Hong Chen , Yumin Lee , Yuh-Chun Lin
发明人： Jeng-Hong Chen , Yumin Lee , Yuh-Chun Lin
IPC分类号： H04L5/12 , H04L23/02
CPC分类号： H04L27/2647 , H04L25/067 , H04L27/0008
摘要： A quadrature frequency division multiplexing (“OFDM”) wireless receiver, including methods and devices for adaptive quantization of OFDM signals according to modulation and coding schemes and sub-carrier frequency responses, is provided. Efficient quantization may be utilized to reduce the large dynamic range of signals to achieve circuit simplification and chip area reduction. In one embodiment, a quantization circuit includes a quantization selector to select quantization thresholds according to modulation and coding schemes and sub-carrier frequency responses, and a non-uniform quantizer to reduce input dynamic range so that an output is represented by fewer bits than an input.
摘要翻译：提供了一种正交频分复用（“OFDM”）无线接收机，包括用于根据调制和编码方案以及子载波频率响应的OFDM信号的自适应量化的方法和装置。可以利用高效量化来减小信号的大动态范围，以实现电路简化和芯片面积减小。在一个实施例中，量化电路包括量化选择器，以根据调制和编码方案和子载波频率响应来选择量化阈值，以及不均匀量化器，以减少输入动态范围，使得输出由比输入。

8. 发明授权

US06259744B1 Method and apparatus for mapping bits to an information burst 有权
标题翻译：将比特映射到信息突发的方法和装置
公开(公告)号：US06259744B1
公开(公告)日：2001-07-10
申请号：US09583380
申请日：2000-05-30
申请人： Yumin Lee , Brian Keith Classon , Joseph Michael Nowack
发明人： Yumin Lee , Brian Keith Classon , Joseph Michael Nowack
IPC分类号： H04L2302
CPC分类号： H04L1/0071 , H04L1/0079 , H04L1/0083 , H04L1/0086 , H04L1/0088 , H04L27/18 , H04L27/34 , H04L27/3405 , H04L2001/0098
摘要： A first group of bits (100, 102, 106), e.g., header symbols/bits, are interleaved to form a first group of interleaved bits. A second group of bits (104), e.g., data symbols/bits, are interleaved to form a second group of interleaved bits. The first and second groups of interleaved bits are mapped to an information burst (114). The first and second groups of interleaved bits may be mapped to the information burst relative to a group of known symbols (116) forming a training sequence. A disadvantaged bit location, i.e., a bit location within the mapping having a relative high probability of incurring a bit error, is identified and an advantaged bit location, i.e., a bit location within the mapping having a relatively low probability of incurring a bit error, is identified. A first group bit from the first group of interleaved bits mapped to the disadvantaged bit location is remapped to the advantaged bit location while a second group bit from the second group of interleaved bits mapped to the advantaged bit location is remapped to the disadvantaged bit location.
摘要翻译：第一比特组（100,102,106），例如头部符号/比特被交织以形成第一组交织比特。第二组比特（104），例如数据符号/比特，被交织以形成第二组交织比特。第一和第二组交错比特被映射到信息突发（114）。第一和第二组交错比特可以相对于形成训练序列的一组已知符号（116）被映射到信息突发。识别处于不利位置的位置，即具有相对较高的出现错误概率的映射内的位位置，并且有利的位位置，即映射内的位位置具有相对较低的发生位错误的概率，被识别。映射到处于不利位置的位置的第一组交错比特的第一组比特被重新映射到优势比特位置，而来自映射到优势比特位置的第二组交织比特的第二组比特重新映射到处于不利位的比特位置。

9. 发明授权

US06690723B1 Decision-aided equalizer 有权
标题翻译：决策辅助均衡器
公开(公告)号：US06690723B1
公开(公告)日：2004-02-10
申请号：US09507851
申请日：2000-02-22
申请人： Karine Gosse , Arnauld Taffin , Yumin Lee
发明人： Karine Gosse , Arnauld Taffin , Yumin Lee
IPC分类号： H03H730
CPC分类号： H04L25/03178 , H04L25/03057 , H04L2025/03401 , H04L2025/0349 , H04L2025/03566
摘要： In a method for channel equalization a communications receiver receives an input data stream comprising modulation symbols. A reduced set sequence estimation algorithm produces intermediate hard decisions, based on the input data stream and on a channel reference, which are applied to a decision feedback filter in a feedback loop. Soft output sequences of emitted symbols are also produced, based on the input data stream, which are decoded, error-corrected and re-encoded. The error-corrected soft output sequences are iteratively applied to the decision feedback filter, such that a channel equalized received data stream is generated based on both the feedback soft output sequences and the intermediate hard decisions. An iterative decision-aided equalizer is also described. In this manner, errors corrected by the decoder are not re-introduced into the decision feedback filter, hereby reducing the effect of error propagation in decision-aided feedback equalizers.
摘要翻译：在用于信道均衡的方法中，通信接收机接收包括调制符号的输入数据流。减少的集合序列估计算法基于输入数据流和信道参考产生中间硬判决，其被应用于反馈回路中的判决反馈滤波器。基于输入数据流也产生发射符号的软输出序列，其被解码，纠错和重新编码。错误校正的软输出序列被迭代地应用于判决反馈滤波器，使得基于反馈软输出序列和中间硬判决两者生成均衡接收数据流的信道。还描述了迭代决策均衡器。以这种方式，由解码器校正的误差不被重新引入到判决反馈滤波器中，从而减少了在决策辅助反馈均衡器中误差传播的影响。

10. 发明授权

US06151358A Method and apparatus, and computer program for producing filter coefficients for equalizers 失效
标题翻译：方法和装置，以及用于产生均衡器的滤波器系数的计算机程序
公开(公告)号：US06151358A
公开(公告)日：2000-11-21
申请号：US375181
申请日：1999-08-11
申请人： Yumin Lee , Vipul Desai
发明人： Yumin Lee , Vipul Desai
IPC分类号： H04L25/03 , H03H7/30 , H03H7/40 , H03K5/159
CPC分类号： H04L25/03146 , H04L2025/0349 , H04L2025/03605
摘要： Apparatus, computer program, and method for producing filter coefficients for an equalizer, the method includes the steps of: estimating a response (810) of a communication channel to a signaling pulse; estimating an autocorrelation (820) of noise and interference of the communication channel; computing an array (830) based on the estimation of the response of the communication channel to the signaling pulse and the estimation of the autocorrelation of the noise and interference of the communication channel; designating (840) at least one pivot position in the array; recursively performing the steps of: transforming the array (850) by a sequence of operations; storing (860) at least one element of the at least one pivot position; shifting (870) the at least one element of the at least one pivot position, thereby providing a shifted transformed array; determining (890) whether the shifted transformed array contains at least one non-zero element; and calculating (880) the filter coefficients based on the stored at least one element and the estimation of the response of the communication channel.
摘要翻译：用于产生用于均衡器的滤波器系数的装置，计算机程序和方法，所述方法包括以下步骤：估计通信信道对信令脉冲的响应（810）; 估计通信信道的噪声和干扰的自相关（820）; 基于通信信道对信令脉冲的响应的估计和对通信信道的噪声和干扰的自相关的估计来计算阵列（830）; 指定（840）阵列中的至少一个枢转位置; 递归地执行以下步骤：通过一系列操作来变换数组（850）; 存储（860）所述至少一个枢转位置中的至少一个元件; 移动（870）所述至少一个枢转位置中的所述至少一个元件，从而提供移位变换的阵列; 确定（890）移位的变换阵列是否包含至少一个非零元素; 以及基于所存储的至少一个元素和所述通信信道的响应的估计来计算（880）所述滤波器系数。

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