公开(公告)号：US07616612B2

公开(公告)日：2009-11-10

申请号：US12349867

申请日：2009-01-07

申请人： Ki Jong Koo ,  Dae Hwan Hwang

发明人： Ki Jong Koo ,  Dae Hwan Hwang

IPC分类号： H04J3/00

CPC分类号： H04W72/1242 ,  H04W28/14 ,  H04W84/12

摘要： A media access control (MAC) apparatus and corresponding methods for guaranteeing quality-of-service in a wireless local area network (LAN) are presented. The MAC method includes the steps of extracting, performing, determining, a first transmitting step, and a second transmitting step. The extracting step includes extracting a user priority from a frame received from an upper layer and separately storing a voice frame and a non-voice frame according to an access category (AC). The performing step includes independently performing backoff operations for the voice frame and the non-voice frame. The determining step includes determining whether the backoff operations for the voice frame and the non-voice frame have simultaneously ended. The first transmitting step includes transmitting the voice frame having a higher priority first and performing the backoff operation for the non-voice frame if the backoff operations have simultaneously ended. The second transmitting step includes transmitting a frame whose backoff operation ends if the backoff operations have not simultaneously ended.

摘要翻译： 提出了一种用于保证无线局域网（LAN）中的服务质量的媒体访问控制（MAC）装置和相应的方法。 MAC方法包括提取，执行，确定第一发送步骤和第二发送步骤的步骤。 提取步骤包括从上层接收的帧中提取用户优先级，并根据访问类别（AC）单独存储语音帧和非语音帧。 执行步骤包括独立地执行语音帧和非语音帧的退避操作。 确定步骤包括确定语音帧和非语音帧的后退操作是否已经同时结束。 第一发送步骤包括首先发送具有较高优先级的语音帧，并且如果退避操作已经同时结束，则对非语音帧执行退避操作。 第二发送步骤包括如果退避操作没有同时结束，则发送回退操作结束的帧。

公开(公告)号：US07436913B2

公开(公告)日：2008-10-14

申请号：US10986645

申请日：2004-11-12

申请人： Hun Sik Kang ,  Dae Hwan Hwang ,  Ji Eun Kim ,  Jein Baek

发明人： Hun Sik Kang ,  Dae Hwan Hwang ,  Ji Eun Kim ,  Jein Baek

IPC分类号： H04L27/08

CPC分类号： H04L27/3809 ,  H03G3/3036

摘要： The present invention relates an automatic gain control device, which performs a high-speed gain control operation in high-speed data communication using burst signals, generates a gain code without using a memory or storage device to simplify a system configuration, and establishes a correct gain control operation. The automatic gain control apparatus includes a power detector for calculating a mean power of the output signal of the variable gain amplifier; a gain code generator for receiving a mean power from the power detector, and generating a gain code corresponding to the received mean power; and a voltage generator for calculating a difference between the gain code and a target gain code associated with the output signal of the variable gain amplifier to detect an error code, and generating a gain control voltage for compensating for the difference between the two gain codes on the basis of the detected error code.

摘要翻译： 本发明涉及一种使用突发信号在高速数据通信中执行高速增益控制操作的自动增益控制装置，不使用存储器或存储装置来产生增益码来简化系统配置，并建立正确的 增益控制操作。 自动增益控制装置包括：功率检测器，用于计算可变增益放大器的输出信号的平均功率; 增益代码发生器，用于从所述功率检测器接收平均功率，以及生成与所接收的平均功率相对应的增益代码; 以及电压发生器，用于计算增益代码和与可变增益放大器的输出信号相关联的目标增益代码之间的差异，以检测错误代码，并产生用于补偿两个增益代码之间的差的增益控制电压 检测错误代码的基础。

公开(公告)号：US20130163869A1

公开(公告)日：2013-06-27

申请号：US13614652

申请日：2012-09-13

申请人： Ji Ho CHANG ,  Dae Hwan Hwang ,  Jae II Cho ,  Dong II Han ,  Jong Ho Choi

发明人： Ji Ho CHANG ,  Dae Hwan Hwang ,  Jae II Cho ,  Dong II Han ,  Jong Ho Choi

IPC分类号： G06K9/48

CPC分类号： G06K9/4604

摘要： Disclosed are an apparatus and a method for extracting an edge to be used for extracting a feature point of an object in an image. The present invention proposes an image edge extracting apparatus and method that remove noise in an input image, calculate a gradient of an image in a noise-removed image, measure magnitude of the gradient, extract an edge having a maximum thickness value, and then calculate a threshold using a ratio of the extracted edge, and detect a final edge robust against noise based on the threshold.

摘要翻译： 公开了一种用于提取要用于提取图像中的对象的特征点的边缘的装置和方法。 本发明提出了一种去除输入图像中的噪声，计算噪声去除图像中的图像的梯度，测量梯度的幅度，提取具有最大厚度值的边缘的图像边缘提取装置和方法，然后计算 阈值，使用所提取的边缘的比率，并且基于阈值检测对噪声的鲁棒性的最终边缘。

公开(公告)号：US20090141938A1

公开(公告)日：2009-06-04

申请号：US12265365

申请日：2008-11-05

申请人： Eul Gyoon Lim ,  Jae II Cho ,  Dae Hwan Hwang

发明人： Eul Gyoon Lim ,  Jae II Cho ,  Dae Hwan Hwang

IPC分类号： G06K9/00 ,  H04N11/02 ,  H04N7/18

CPC分类号： H04N7/18 ,  G06K9/00664 ,  G06T7/593 ,  G06T2207/10021 ,  G06T2207/20021 ,  G06T2207/20052 ,  G06T2207/30196 ,  G06T2207/30261

摘要： A robot vision system for outputting a disparity map includes a stereo camera for receiving left and right images and outputting a disparity map between the two images; an encoder for encoding either the left image or the right image into a motion compensation-based video bit-stream; and a decoder for extracting an encoding type of an image block, a motion vector, and a DCT coefficient from the video bit-stream. Further, the system includes a person detector for detecting and labeling person blocks in the image using the disparity map between the left image and the right image, the block encoding type, and the motion vector, and detecting a distance from the labeled person to the camera; and an obstacle detector for detecting a closer obstacle than the person using the block encoding type, the motion vector, and the DCT coefficient extracted from the video bit-stream, and the disparity map.

摘要翻译： 用于输出视差图的机器人视觉系统包括用于接收左图像和右图像并在两个图像之间输出视差图的立体相机; 用于将左图像或右图像编码为基于运动补偿的视频比特流的编码器; 以及用于从视频比特流中提取图像块的编码类型，运动矢量和DCT系数的解码器。 此外，该系统包括人物检测器，用于使用左图像和右图像之间的视差图，块编码类型和运动矢量来检测和标记图像中的人物块，并且检测从标记的人到 相机; 以及用于检测比使用从视频比特流提取的块编码类型，运动矢量和DCT系数的人和视差图更接近的障碍物的障碍物检测器。

公开(公告)号：US6058122A

公开(公告)日：2000-05-02

申请号：US102006

申请日：1998-06-22

申请人： Dae Hwan Hwang ,  Jong Hyeong Lee ,  Young Duk Park ,  Kyu Seob Cho

发明人： Dae Hwan Hwang ,  Jong Hyeong Lee ,  Young Duk Park ,  Kyu Seob Cho

IPC分类号： G06T9/00 ,  H04L12/70 ,  H04N7/15 ,  H04N7/24 ,  H04Q11/04 ,  H04J3/12

CPC分类号： H04Q11/0478 ,  G06T9/007 ,  H04N7/15 ,  H04N7/24 ,  H04L2012/5647 ,  H04L2012/5649 ,  H04L2012/5664

摘要： The invention provides a method of multiplexing moving pictures fed from a plurality of multimedia communication terminals through broadband Integrated Service Distance Network (B-ISDN) and displaying a multiplexed moving picture on a display unit of the plurality of terminals, which comprising the steps of checking a type and a performance of the terminals, and assistance possible performance of the MCU to the terminals by end-and-end signaling; and selecting M terminals among the plurality of terminals connected thereto; generating a start signal to the selected M terminals, the start signal allowing each of the selected terminals to generate the moving picture to be processed; processing a first and second moving pictures generated from two terminals in response to the start signal; processing a third and four moving pictures generated from two terminals in response to the start signal; repeating said steps until all of moving pictures from the selected M terminals are inputted.

摘要翻译： 本发明提供了一种通过宽带综合业务距离网络（B-ISDN）从多个多媒体通信终端馈送的运动图像复用并在多个终端的显示单元上显示多路复用运动图像的方法，包括以下步骤： 终端的类型和性能，通过终端和终端信令协助MCU对终端的可能性能; 以及在与所连接的多个终端中选择M个终端; 向所选择的M个终端产生起始信号，允许所选择的终端中的每一个生成要处理的运动图像的开始信号; 响应于所述起始信号处理从两个终端产生的第一和第二运动图像; 响应于所述起始信号处理从两个终端产生的第三和四个运动图像; 重复所述步骤，直到来自所选择的M个终端的所有运动图像都被输入。

公开(公告)号：US08401280B2

公开(公告)日：2013-03-19

申请号：US12971793

申请日：2010-12-17

申请人： Eul Gyoon Lim ,  Ji Ho Chang ,  Ho Chul Shin ,  Dae Hwan Hwang

发明人： Eul Gyoon Lim ,  Ji Ho Chang ,  Ho Chul Shin ,  Dae Hwan Hwang

IPC分类号： G06K9/00 ,  G06K9/40

CPC分类号： G06K9/00

摘要： Provided is a device for improving stereo matching results. The device for improving stereo matching results includes: a stereo camera unit outputting binocular disparity images by using binocular disparity between two images preprocessed according to a plurality of preprocessing conditions; a discrete cosine transform (DCT) unit generating DCT coefficients by performing DCT on the binocular disparity images; a streak estimation unit receiving the DCT coefficients and estimating amounts of streaks distributed on a screen by using AC coefficients, including streak patterns, of the DCT coefficients; a condition estimation unit estimating a preprocessing condition, corresponding to the smallest amount of streaks of the estimated amounts of streaks, of the plurality of preprocessing conditions, as an optimal condition, and a streak removal unit generating binocular disparity images without the streaks by changing predetermined AC coefficients of the DCT coefficients and performing inverse DCT on the changed DCT coefficients.

摘要翻译： 提供了一种用于改善立体匹配结果的设备。 用于改善立体匹配结果的装置包括：立体相机单元，通过使用根据多个预处理条件预处理的两个图像之间的双目视差来输出双目视差图像; 离散余弦变换（DCT）单元，通过对双目视差图像执行DCT生成DCT系数; 条纹估计单元，通过使用DCT系数的包括条纹图案的AC系数来接收DCT系数并估计分布在屏幕上的条纹的数量; 条件估计单元，估计对应于多个预处理条件中的条纹的条纹的最小量的预处理条件作为最佳条件，以及条纹去除单元，通过改变预定的条件来生成没有条纹的双目视差图像 对DCT系数的AC系数进行DCT系数的DCT变换。

公开(公告)号：US20110188740A1

公开(公告)日：2011-08-04

申请号：US12971793

申请日：2010-12-17

申请人： Eul Gyoon LIM ,  Ji Ho Chang ,  Ho Chul Shin ,  Dae Hwan Hwang

发明人： Eul Gyoon LIM ,  Ji Ho Chang ,  Ho Chul Shin ,  Dae Hwan Hwang

IPC分类号： G06K9/00

CPC分类号： G06K9/00

摘要： Provided is a device for improving stereo matching results. The device for improving stereo matching results includes: a stereo camera unit outputting binocular disparity images by using binocular disparity between two images preprocessed according to a plurality of preprocessing conditions; a discrete cosine transform (DCT) unit generating DCT coefficients by performing DCT on the binocular disparity images; a streak estimation unit receiving the DCT coefficients and estimating amounts of streaks distributed on a screen by using AC coefficients, including streak patterns, of the DCT coefficients; a condition estimation unit estimating a preprocessing condition, corresponding to the smallest amount of streaks of the estimated amounts of streaks, of the plurality of preprocessing conditions, as an optimal condition, and a streak removal unit generating binocular disparity images without the streaks by changing predetermined AC coefficients of the DCT coefficients and performing inverse DCT on the changed DCT coefficients.

摘要翻译： 提供了一种用于改善立体匹配结果的设备。 用于改善立体匹配结果的装置包括：立体相机单元，通过使用根据多个预处理条件预处理的两个图像之间的双目视差来输出双目视差图像; 离散余弦变换（DCT）单元，通过对双目视差图像执行DCT生成DCT系数; 条纹估计单元，通过使用DCT系数的包括条纹图案的AC系数来接收DCT系数并估计分布在屏幕上的条纹的数量; 条件估计单元，估计对应于多个预处理条件中的条纹的条纹的最小量的预处理条件作为最佳条件，以及条纹去除单元，通过改变预定的条件来生成没有条纹的双目视差图像 对DCT系数的AC系数进行DCT系数的DCT变换。

公开(公告)号：US20090122804A1

公开(公告)日：2009-05-14

申请号：US12349867

申请日：2009-01-07

申请人： Ki Jong Koo ,  Dae Hwan Hwang

发明人： Ki Jong Koo ,  Dae Hwan Hwang

IPC分类号： H04L12/56

CPC分类号： H04W72/1242 ,  H04W28/14 ,  H04W84/12

摘要： A media access control (MAC) apparatus and corresponding methods for guaranteeing quality-of-service in a wireless local area network (LAN) are presented. The MAC method includes the steps of extracting, performing, determining, a first transmitting step, and a second transmitting step. The extracting step includes extracting a user priority from a frame received from an upper layer and separately storing a voice frame and a non-voice frame according to an access category (AC). The performing step includes independently performing backoff operations for the voice frame and the non-voice frame. The determining step includes determining whether the backoff operations for the voice frame and the non-voice frame have simultaneously ended. The first transmitting step includes transmitting the voice frame having a higher priority first and performing the backoff operation for the non-voice frame if the backoff operations have simultaneously ended. The second transmitting step includes transmitting a frame whose backoff operation ends if the backoff operations have not simultaneously ended.

公开(公告)号：US08199729B2

公开(公告)日：2012-06-12

申请号：US12423938

申请日：2009-04-15

申请人： Ki Jong Koo ,  Dae Hwan Hwang

发明人： Ki Jong Koo ,  Dae Hwan Hwang

IPC分类号： H04J3/00

CPC分类号： H04W72/1242 ,  H04W28/14 ,  H04W84/12

摘要： A media access control (MAC) apparatus and corresponding methods for guaranteeing quality-of-service in a wireless local area network (LAN) are presented. The MAC method includes the steps of extracting, performing, determining, a first transmitting step, and a second transmitting step. The extracting step includes extracting a user priority from a frame received from an upper layer and separately storing a voice frame and a non-voice frame according to an access category (AC). The performing step includes independently performing backoff operations for the voice frame and the non-voice frame. The determining step includes determining whether the backoff operations for the voice frame and the non-voice frame have simultaneously ended. The first transmitting step includes transmitting the voice frame having a higher priority first and performing the backoff operation for the non-voice frame if the backoff operations have simultaneously ended. The second transmitting step includes transmitting a frame whose backoff operation ends if the backoff operations have not simultaneously ended.

摘要翻译： 提出了一种用于保证无线局域网（LAN）中的服务质量的媒体访问控制（MAC）装置和相应的方法。 MAC方法包括提取，执行，确定第一发送步骤和第二发送步骤的步骤。 提取步骤包括从上层接收的帧中提取用户优先级，并根据访问类别（AC）单独存储语音帧和非语音帧。 执行步骤包括独立地执行语音帧和非语音帧的退避操作。 确定步骤包括确定语音帧和非语音帧的后退操作是否已经同时结束。 第一发送步骤包括首先发送具有较高优先级的语音帧，并且如果退避操作已经同时结束，则对非语音帧执行退避操作。 第二发送步骤包括如果退避操作没有同时结束，则发送回退操作结束的帧。

公开(公告)号：US20100158382A1

公开(公告)日：2010-06-24

申请号：US12552624

申请日：2009-09-02

申请人： Jae II CHO ,  Seung Min Chol ,  Ji Ho Chang ,  Dae Hwan Hwang

发明人： Jae II CHO ,  Seung Min Chol ,  Ji Ho Chang ,  Dae Hwan Hwang

IPC分类号： G06K9/46

CPC分类号： G06K9/00228 ,  G06K9/00973

摘要： The system for detecting a face pattern from an input image includes a window extraction unit, a cost calculation unit, and a face pattern discrimination unit. The window extraction unit receives a pre-processed image corresponding to the input image to scan the preprocessed image in a certain window size, and parallelly outputs pre-processing coefficient values corresponding to the scanned pre-processed image. The cost calculation unit parallelly receives the pre-processing coefficient values corresponding to the window size, calculates cost values corresponding to the pre-processed coefficient values, and sums the cost values. The face pattern discrimination unit compares the sum of the cost values with a preset threshold value and discriminates if the pre-processed image corresponding to the window size is the face pattern.

摘要翻译： 用于从输入图像检测面部图案的系统包括窗口提取单元，成本计算单元和面部模式识别单元。 窗口提取单元接收与输入图像相对应的预处理图像，以一定窗口大小扫描预处理图像，并且平行地输出与扫描的预处理图像对应的预处理系数值。 成本计算单元并行地接收与窗口大小相对应的预处理系数值，计算与预处理系数值对应的成本值，并且计算成本值。 面部图案识别单元将成本值的总和与预设的阈值进行比较，并且判别与窗口尺寸相对应的预处理图像是否是面部图案。