公开(公告)号：US20090150143A1

公开(公告)日：2009-06-11

申请号：US12155542

申请日：2008-06-05

申请人： Hyun-woo Kim ,  Jong-mo Sung ,  Mi-suk Lee ,  Do-young Kim ,  Byung-sun Lee

发明人： Hyun-woo Kim ,  Jong-mo Sung ,  Mi-suk Lee ,  Do-young Kim ,  Byung-sun Lee

IPC分类号： G10L21/00 ,  G10L19/00

CPC分类号： G10L19/26 ,  G10L19/0212

摘要： A post-filtering apparatus and method for speech enhancement in a modified discrete cosine transform (MDCT) domain are disclosed. In the apparatus and method, previous and current MDCT coefficients are used for obtaining a speech spectrum coefficient similar to a real speech spectrum, and a convex function is used for transforming the speech spectrum coefficient and obtaining a post-filter coefficient so that difference can increase in the case where the speech spectrum coefficient is small but decrease in the case where the coefficient is large. Then, the post-filter coefficient is applied to the MDCT coefficient. With this configuration, both the current and previous MDCT values are used, so that it is possible to obtain a spectrum coefficient similar to the real speech spectrum and to obtain a more accurate filter coefficient. Further, the coefficient is adaptively transformed through the convex function, thereby enhancing speech quality.

摘要翻译： 公开了一种用于修正的离散余弦变换（MDCT）域中的语音增强的后置滤波装置和方法。 在该装置和方法中，先前和当前的MDCT系数被用于获得类似于真实语音频谱的语音频谱系数，并且使用凸函数来变换语音频谱系数并获得后置滤波器系数，使得差值可以增加 在语音频谱系数小的情况下，在系数大的情况下减少。 然后，将后滤波器系数应用于MDCT系数。 利用该配置，使用当前和先前的MDCT值，使得可以获得与真实语音频谱相似的频谱系数并获得更准确的滤波器系数。 此外，系数通过凸函数自适应地变换，从而提高语音质量。

公开(公告)号：US08315853B2

公开(公告)日：2012-11-20

申请号：US12155542

申请日：2008-06-05

申请人： Hyun-woo Kim ,  Jong-mo Sung ,  Mi-suk Lee ,  Do-young Kim ,  Byung-sun Lee

发明人： Hyun-woo Kim ,  Jong-mo Sung ,  Mi-suk Lee ,  Do-young Kim ,  Byung-sun Lee

IPC分类号： G06F15/00 ,  G10L11/00 ,  G10L19/00 ,  G10L21/00 ,  G10L19/14 ,  G10L19/12 ,  G10L21/02

CPC分类号： G10L19/26 ,  G10L19/0212

摘要： A post-filtering apparatus and method for speech enhancement in a modified discrete cosine transform (MDCT) domain are disclosed. In the apparatus and method, previous and current MDCT coefficients are used for obtaining a speech spectrum coefficient similar to a real speech spectrum, and a convex function is used for transforming the speech spectrum coefficient and obtaining a post-filter coefficient so that difference can increase in the case where the speech spectrum coefficient is small but decrease in the case where the coefficient is large. Then, the post-filter coefficient is applied to the MDCT coefficient. With this configuration, both the current and previous MDCT values are used, so that it is possible to obtain a spectrum coefficient similar to the real speech spectrum and to obtain a more accurate filter coefficient. Further, the coefficient is adaptively transformed through the convex function, thereby enhancing speech quality.

摘要翻译： 公开了一种用于修正的离散余弦变换（MDCT）域中的语音增强的后置滤波装置和方法。 在该装置和方法中，先前和当前的MDCT系数被用于获得类似于真实语音频谱的语音频谱系数，并且使用凸函数来变换语音频谱系数并获得后置滤波器系数，使得差值可以增加 在语音频谱系数小的情况下，在系数大的情况下减少。 然后，将后滤波器系数应用于MDCT系数。 利用该配置，使用当前和先前的MDCT值，使得可以获得与真实语音频谱相似的频谱系数并获得更准确的滤波器系数。 此外，系数通过凸函数自适应地变换，从而提高语音质量。

公开(公告)号：US08401067B2

公开(公告)日：2013-03-19

申请号：US12113620

申请日：2008-05-01

申请人： Jin-sul Kim ,  Hyun-woo Lee ,  Won Ryu ,  Byung-sun Lee

发明人： Jin-sul Kim ,  Hyun-woo Lee ,  Won Ryu ,  Byung-sun Lee

IPC分类号： G06K9/46

CPC分类号： H04L41/509 ,  H04L41/5009

摘要： A method and apparatus for measuring the quality of a video provided in an IP network based media service is provided. The apparatus for measuring Quality of Experience (QoE) guaranteed real-time Internet Protocol (IP)-media video quality, includes: a receiver receiving a transmission video provided through an IP network service platform and an original video corresponding to the transmission video, and extracting frames of the transmission video and the original video; a detector comparing the frames of the transmission video and the original video in real time to obtain a difference between the frames of the transmission video and the original video and detecting a matching segment between the transmission video and the original video; and a measurement unit calculating a QoE parameter using the frames of the transmission video and the original video which correspond to the matching segment.

摘要翻译： 提供了一种用于测量在基于IP网络的媒体服务中提供的视频的质量的方法和装置。 用于测量体验质量（QoE）保证的实时互联网协议（IP）媒体视频质量的装置包括：接收通过IP网络服务平台提供的传输视频的接收机和对应于传输视频的原始视频， 提取传输视频和原始视频的帧; 检测器，将传输视频和原始视频的帧实时比较，以获得传输视频和原始视频的帧之间的差异，并检测传输视频与原始视频之间的匹配段; 以及测量单元，其使用与所述匹配段对应的所述传输视频和所述原始视频的帧来计算QoE参数。

公开(公告)号：US20090154368A1

公开(公告)日：2009-06-18

申请号：US12113620

申请日：2008-05-01

申请人： Jin-sul Kim ,  Hyun-woo Lee ,  Won Ryu ,  Byung-sun Lee

发明人： Jin-sul Kim ,  Hyun-woo Lee ,  Won Ryu ,  Byung-sun Lee

IPC分类号： H04L12/26

CPC分类号： H04L41/509 ,  H04L41/5009

摘要： A method and apparatus for measuring the quality of a video provided in an IP network based media service is provided. The apparatus for measuring Quality of Experience (QoE) guaranteed real-time Internet Protocol (IP)-media video quality, includes: a receiver receiving a transmission video provided through an IP network service platform and an original video corresponding to the transmission video, and extracting frames of the transmission video and the original video; a detector comparing the frames of the transmission video and the original video in real time to obtain a difference between the frames of the transmission video and the original video and detecting a matching segment between the transmission video and the original video; and a measurement unit calculating a QoE parameter using the frames of the transmission video and the original video which correspond to the matching segment.

摘要翻译： 提供了一种用于测量在基于IP网络的媒体服务中提供的视频的质量的方法和装置。 用于测量体验质量（QoE）保证的实时互联网协议（IP）媒体视频质量的装置包括：接收通过IP网络服务平台提供的传输视频的接收机和对应于传输视频的原始视频， 提取传输视频和原始视频的帧; 检测器，将传输视频和原始视频的帧实时比较，以获得传输视频和原始视频的帧之间的差异，并检测传输视频与原始视频之间的匹配段; 以及测量单元，其使用与所述匹配段对应的所述传输视频和所述原始视频的帧来计算QoE参数。

公开(公告)号：US20100241756A1

公开(公告)日：2010-09-23

申请号：US12528519

申请日：2008-07-07

申请人： Hyun-woo Lee ,  Kwi-hoon Kim ,  Won Ryu ,  Byung-sun Lee

发明人： Hyun-woo Lee ,  Kwi-hoon Kim ,  Won Ryu ,  Byung-sun Lee

IPC分类号： G06F15/16 ,  G06F21/00

CPC分类号： H04W36/0038 ,  H04W12/06 ,  H04W36/0016 ,  H04W80/02 ,  H04W80/04

摘要： Provided are a method and a system for controlling access authentication in the process of a handover. The method of controlling access authentication in the process of handover of a mobile node in a network that consists of a core network and a plurality of access networks, the method comprising: when the mobile node initially accesses a first access network, performing access authentication of the mobile node and registering and managing the authentication information by using a user profile server, and searching for a host channel adaptor adjacent to the mobile node and transmitting identification, a profile, and authentication information of the mobile node to a network access server, in which the searched host channel adaptor is mounted, by using a mobility control server; when the mobile node moves to a second access network, performing a handover procedure and performing re-access authentication procedure by transferring authentication information regarding the handover to a network access server which is included in the second access network; and after performing the re-access authentication procedure, searching for a host channel adaptor adjacent to the mobile node and transmitting authentication information to a network access server which includes the searched host channel adaptor by using the mobility control server. Accordingly, an access delay time in the process of a handover can be reduced.

摘要翻译： 提供了一种用于在切换过程中控制访问认证的方法和系统。 在由核心网络和多个接入网络组成的网络中的移动节点的切换过程中控制接入认证的方法，所述方法包括：当所述移动节点最初访问第一接入网络时，执行接入认证 移动节点，并且通过使用用户简档服务器注册和管理认证信息，并且搜索与移动节点相邻的主机信道适配器，并向网络接入服务器发送移动节点的标识，配置文件和认证信息， 通过使用移动性控制服务器来安装搜索到的主机信道适配器; 当移动节点移动到第二接入网络时，执行切换过程并通过将关于切换的认证信息传送到包括在第二接入网络中的网络接入服务器来执行重新接入认证过程; 并且在执行重新访问认证过程之后，搜索与移动节点相邻的主机信道适配器，并通过使用移动性控制服务器向包括搜索到的主机信道适配器的网络接入服务器发送认证信息。 因此，可以减少切换过程中的访问延迟时间。