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    • 113. 发明授权
    • Method and apparatus for removing image noise
    • 去除图像噪声的方法和装置
    • US08611680B2
    • 2013-12-17
    • US12745011
    • 2008-11-11
    • Yutaka YamamotoMasaaki NagaharaAkira Kobayashi
    • Yutaka YamamotoMasaaki NagaharaAkira Kobayashi
    • G06K9/36G06K9/40
    • H04N19/117H04N19/14H04N19/176H04N19/436H04N19/86
    • An FFT analysis is performed on the decoded image data of one frame, and a cutoff frequency based on the assumption that the original signal has first-order attenuation characteristics is obtained in both the horizontal and vertical directions. A sampled-data H∞ filter (digital filter), previously designed to have different parameters corresponding to different cutoff frequencies is selected. By using this filter, a filtering process is performed on the image data decoded both in the horizontal and vertical directions. Since the variety of the analog frequency characteristics of the original image is taken into account for every frame of the image, the information that seems to be noise in the original image is less likely to be removed, and mosquito noise and block noise associated with a coding/decoding process can be efficiently removed.
    • 对一帧的解码图像数据执行FFT分析,并且基于在水平和垂直方向上获得原始信号具有一阶衰减特性的假设的截止频率。 选择先前设计为具有对应于不同截止频率的不同参数的采样数据H∞滤波器(数字滤波器)。 通过使用该滤波器,对在水平方向和垂直方向上解码的图像数据进行滤波处理。 由于对于图像的每一帧考虑了原始图像的模拟频率特性的多样性,原始图像中似乎是噪声的信息不太可能被去除,并且与a相关联的蚊式噪声和块噪声 可以有效地去除编码/解码过程。
    • 119. 发明授权
    • Multicast communication system and method
    • 组播通信系统及方法
    • US08027274B2
    • 2011-09-27
    • US12523855
    • 2008-01-25
    • Kaname NaitoAkira KobayashiKatsuhiro OchiaiMotonobu KimuraShuhei MiuraJunichi SatoTakashi Okazaki
    • Kaname NaitoAkira KobayashiKatsuhiro OchiaiMotonobu KimuraShuhei MiuraJunichi SatoTakashi Okazaki
    • H04L12/28
    • H04L12/185H04L47/10
    • The present invention aims to realize a system and method of reliably performing multicast communication via a bandwidth-guaranteed network, and provides a multicast communication system for performing multicast communication via a bandwidth-guaranteed network, the system including: a multicast proxy response device added with a group address destination identifier; and a multicast client, wherein the multicast proxy response device transmits a session connection request to the group address destination identifier of the multicast proxy response device when starting reception, the multicast proxy response device which has received said session connection request transmits a session connection response to said multicast client, and the multicast client receives multicast data through a bandwidth secured in the bandwidth-guaranteed network by the session connection response.
    • 本发明旨在实现经由带宽保证网络可靠地执行组播通信的系统和方法,并且提供了一种通过带宽保证网络进行组播通信的组播通信系统,该系统包括:添加了组播代理响应设备 组地址目的地标识符; 组播客户端,其中,当开始接收时,组播代理响应设备向组播代理响应设备的组地址目的地标识符发送会话连接请求,已经接收到所述会话连接请求的组播代理响应设备向会话连接请求发送会话连接响应 所述组播客户端,并且组播客户端通过会话连接响应通过带宽保证网络中保护的带宽接收组播数据。