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    Multicast communication system allows user to join or leave multicast groups and specify communication quality using easily comprehensible and operable user terminal display
    74.
    发明授权
    Multicast communication system allows user to join or leave multicast groups and specify communication quality using easily comprehensible and operable user terminal display 失效
    组播通信系统允许用户使用易于理解和可操作的用户终端显示来加入或离开多播组并指定通信质量

    公开(公告)号：US5832229A

    公开(公告)日：1998-11-03

    申请号：US687627

    申请日：1996-07-26

    申请人： Ichiro Tomoda ,  Toru Kambayashi ,  Satoshi Ito ,  Takashi Ida ,  Yasuhiko Shimomura ,  Toshiya Takahashi ,  Hirofumi Muratani ,  Masafumi Kondo

    发明人： Ichiro Tomoda ,  Toru Kambayashi ,  Satoshi Ito ,  Takashi Ida ,  Yasuhiko Shimomura ,  Toshiya Takahashi ,  Hirofumi Muratani ,  Masafumi Kondo

    IPC分类号： H04N7/10 ,  G09G5/00 ,  G09G5/08 ,  H04L12/18 ,  H04L29/06 ,  G06F13/00

    CPC分类号： H04L65/4076 ,  H04L12/185 ,  H04L29/06 ,  H04L29/06027

    摘要： The multicast communication scheme which can enable a user to easily comprehend the multicast groups existing on the network, easily carry out an operation to join a desired multicast group, and easily specify a desired communication quality. At each user terminal, a virtual space with a plurality of regions defined therein in correspondence to a plurality of multicast groups is displayed on a screen, while an information indicating a range of each region in the virtual space is stored in correspondence to an address information for a corresponding multicast group. A desired position in the virtual space on the screen is specified by an input device, and joining/leaving to/from multicast groups is controlled by using the address information stored in correspondence to a region in the virtual space which contains the desired position. The display on the screen may include a plurality of zones defined within each region in correspondence to a plurality of different communication qualities, so that a communication quality of a multicast communication to be received can be controlled according to a zone within a region in the virtual space which contains the desired position.

    摘要翻译： 可以使得用户能够容易地理解存在于网络上的多播组的组播通信方案容易地执行加入所需多播组的操作，并且容易地指定期望的通信质量。 在每个用户终端处，在屏幕上显示具有与多个多播组对应地定义的多个区域的虚拟空间，同时根据地址信息存储指示虚拟空间中的每个区域的范围的信息 为相应的组播组。 屏幕上的虚拟空间中的期望位置由输入设备指定，并且通过使用与包含期望位置的虚拟空间中的区域相对应地存储的地址信息来控制来自/来自多播组的加入/离开。 屏幕上的显示可以包括对应于多个不同通信质量在每个区域内定义的多个区域，从而可以根据虚拟的区域内的区域来控制要接收的多播通信的通信质量 包含所需位置的空间。

    Picture reproduction apparatus and picture decoding apparatus
    75.
    发明授权
    Picture reproduction apparatus and picture decoding apparatus 失效
    图像再现装置和图像解码装置

    公开(公告)号：US5649047A

    公开(公告)日：1997-07-15

    申请号：US254037

    申请日：1994-06-03

    申请人： Toshiya Takahashi ,  Tatsushi Bannai

    发明人： Toshiya Takahashi ,  Tatsushi Bannai

    IPC分类号： H04N5/783 ,  H04N5/926 ,  H04N5/92

    CPC分类号： H04N5/783 ,  H04N5/9264 ,  H04N5/9261

    摘要： The picture reproduction apparatus of this invention reproduces compressed image data which has been compressed using inter-frame encoding, extracts a header from the reproduced image data, taking out intra-frame encoded image data using the information of the header. Invalid data is added to the image data other than the intra-frame encoded data. The image data is output into a picture decoding apparatus, so as to obtain a reproduced video image during playback in fast forward and fast reverse. Alternatively, valid image data is detected from the reproduced image data. In the slow playback at a 1/N speed, M (

    摘要翻译： 本发明的图像再现设备使用帧间编码再现已经压缩的压缩图像数据，从再现的图像数据中提取标题，使用报头的信息取出帧内编码的图像数据。 将无效数据添加到图像数据之外，而不是帧内编码数据。 将图像数据输出到图像解码装置中，以便在快进和快退过程中获得再现的视频图像。 或者，从再现的图像数据检测有效图像数据。 在1 / N速度的慢播放中，输出有效图像数据的M（

    Image coding method and apparatus
    78.
    发明授权
    Image coding method and apparatus 失效
    图像编码方法及装置

    公开(公告)号：US5347309A

    公开(公告)日：1994-09-13

    申请号：US871697

    申请日：1992-04-21

    申请人： Toshiya Takahashi

    发明人： Toshiya Takahashi

    IPC分类号： G06T9/00 ,  H04N7/26 ,  H04N7/36 ,  H04N7/50 ,  H04N7/137

    CPC分类号： H04N19/527 ,  H04N19/105 ,  H04N19/112 ,  H04N19/137 ,  H04N19/51 ,  H04N19/61

    摘要： An inter-field motion vector of an interlaced scanned inputted image is detected, and, using the detected inter-field motion vector, movements between fields are compensated to constitute a frame. The frame is then subjected to block coding. Alternatively, an interlaced scanned input image is subjected to two-dimensional block division and further an activity of each two-dimensional block is calculated. Using the activity as an index, the two-dimensional block is divided into either field small blocks constituted by field data or frame small blocks constituted by frame data, and the divided small blocks are coded. By these steps, even an image having large motion does not invite degradation of image quality, and high efficiency image coding can be realized.

    摘要翻译： 检测隔行扫描的输入图像的场间运动矢量，并且使用检测到的场间运动矢量来补偿场之间的运动以构成帧。 然后对该帧进行块编码。 或者，将隔行扫描的输入图像进行二维块划分，并且还计算每个二维块的活动。 使用活动作为索引，二维块被划分为由场数据构成的场小块或由帧数据构成的帧小块，并且分割的小块被编码。 通过这些步骤，即使具有大的运动的图像也不会引起图像质量的劣化，并且可以实现高效率的图像编码。