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    • 1. 发明专利
    • Communication control apparatus and communication quality measuring method
    • 通信控制装置和通信质量测量方法
    • JP2011182212A
    • 2011-09-15
    • JP2010045015
    • 2010-03-02
    • Hitachi Ltd株式会社日立製作所
    • IMAI MITSUHIROKIMURA JUNICHI
    • H04L12/66H04L12/70
    • H04L43/00
    • PROBLEM TO BE SOLVED: To provide a communication control apparatus for measuring distribution quality in unicast/multicast video distribution of terminal equipment. SOLUTION: The present invention relates to a communication control apparatus connecting a first network and a second network. A distribution server for distributing data packets of a plurality of contents is connected to the first network, and a plurality of computers for acquiring the data packets from the distribution server are connected to the second network. The communication control apparatus is characterized by acquiring control information that a computer transmits to the distribution server, extracting computer specification information and data packet specification information from the acquired control information and, based on the extracted computer specification information and the extracted data packet specification information, measuring distribution quality of a data packet of a measuring target to be transmitted to the specified computer. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:提供一种用于测量终端设备的单播/多播视频分发中的分配质量的通信控制装置。 解决方案:本发明涉及连接第一网络和第二网络的通信控制装置。 用于分发多个内容的数据分组的分发服务器连接到第一网络,并且用于从分发服务器获取数据分组的多个计算机连接到第二网络。 通信控制装置的特征在于,获取计算机向分发服务器发送的控制信息,从获取的控制信息中提取计算机指定信息和数据分组指定信息,并且基于所提取的计算机指定信息和提取的数据分组指定信息, 测量要发送到指定计算机的测量目标的数据分组的分布质量。 版权所有(C)2011,JPO&INPIT
    • 2. 发明专利
    • Content backup method and content recording device
    • 内容备份方法和内容记录设备
    • JP2008250455A
    • 2008-10-16
    • JP2007088392
    • 2007-03-29
    • Hitachi Ltd株式会社日立製作所
    • NOMURA KUNIHIROKIMURA JUNICHIYANAGI KUNIHIROYAMADA YOSHIHIRO
    • G06F12/00G06F21/24G06F21/62H04N5/76H04N5/765H04N7/173H04N21/433H04N21/442
    • PROBLEM TO BE SOLVED: To provide a backup method compatible with various backup forms desired by a user when the remaining capacity of a recording device is insufficient, and to provide a content recording device. SOLUTION: When the remaining capacity of a content storage part 41 in the recording device 5 to record new contents distributed from a center 3 is insufficient, the center 3 presents the recording device 5 with a plurality of service configurations for keeping the content in place of the recording device, and backs up and saves the contents in accordance with the service configuration selected by the user. The service configurations provided by the center include: (1) depositing the recorded contents from the oldest recording date; (2) preventing the contents to be recorded from being delivered to the recording device while storing the contents in the center in place of the recording device; and (3) preferentially keeping the one selected by the user among the recorded contents, etc. COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:当记录装置的剩余容量不足时,提供与用户所期望的各种备份形式兼容的备份方法,并提供内容记录装置。 解决方案:当记录装置5中的内容存储部分41的记录从中心3分发的新内容的剩余容量不足时,中心3向记录装置5呈现用于保持内容的多种服务配置 代替记录设备,并根据用户选择的服务配置备份和保存内容。 中心提供的服务配置包括:(1)从最早的记录日期存放记录的内容; (2)在将内容物存储在中心而不是记录装置的同时,防止将内容物记录在记录装置中; (3)优先保留用户选择的记录内容等。版权所有(C)2009,JPO&INPIT
    • 3. 发明专利
    • Method for downloading content and terminal device
    • 用于下载内容和终端设备的方法
    • JP2008134992A
    • 2008-06-12
    • JP2007126006
    • 2007-05-10
    • Hitachi Ltd株式会社日立製作所
    • NOMURA KUNIHIROKIMURA JUNICHIYANAGI KUNIHIRO
    • G06F13/00G06F21/00G09C1/00
    • PROBLEM TO BE SOLVED: To provide a method for efficiently downloading content to a user earlier as much as possible by leveling accesses for downloading the content when the accesses are converged on a server. SOLUTION: When popular content is sold or lent, reservations are received before a sale start date or a rental start date. If the number of reservations exceeds a prescribed number, the content body is encrypted and transmitted to each terminal device (a television with a recording function) before the sale start date or the rental start date. On the sale start date or the rental start date, a key for decrypting the contents is transmitted to the terminal device. A user of the terminal device cannot view the content until arrival of the key. Consequently the load of the server can be reduced and a user's request can be satisfied. COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:提供一种方法,用于在访问集中在服务器上时通过调平用于下载内容的访问来尽可能多地有效地将内容下载给用户。

      解决方案:当流行内容出售或借出时,在开始销售开始日期或租赁开始日期之前收到预订。 如果预约数量超过规定数量,则在销售开始日期或租赁开始日期之前,将内容主体加密并发送到每个终端设备(具有记录功能的电视机)。 在出售开始日期或出租开始日期,将解密内容的密钥发送到终端设备。 终端设备的用户在密钥到达之前不能查看内容。 因此,可以减少服务器的负载,并且可以满足用户的请求。 版权所有(C)2008,JPO&INPIT

    • 5. 发明专利
    • Method and apparatus for image coding/decoding
    • 用于图像编码/解码的方法和装置
    • JP2005218134A
    • 2005-08-11
    • JP2005085160
    • 2005-03-24
    • Hitachi Ltd株式会社日立製作所
    • NAKAYA YUICHIROKIMURA JUNICHI
    • H04N19/50H04N19/46H04N19/503H04N19/51H04N19/523H04N19/54H04N19/70H04N7/32
    • PROBLEM TO BE SOLVED: To provide a method for preventing a mismatch of predicted images caused by the difference in calculation accuracy of motion vectors without complicating calculation, in a motion compensation system in which the entire pixels belonging to an identical patch are not limited to have common motion vectors, and the horizontal/vertical components of the motion vectors of the pixels can take any values other than integer multiples of the distance between neighboring pixels.
      SOLUTION: The horizontal and vertical components of the motion vectors of each pixel for use in synthesizing the predicted images are specified so as to take only the values of integer multiples of 1/d1 and 1/d2 (where d1, d2 are positive integers) of the distance between the neighboring pixels, respectively. With this, the mismatch in the predicted images caused by the difference in the calculation accuracy of the motion vectors can be prevented with a simple calculation, which leads to the simplification of the processing.
      COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:提供一种用于防止由运动矢量的计算精度差导致的预测图像不匹配的方法,而不会使计算复杂化,在其中属于相同补丁的整个像素不是的运动补偿系统中 限于具有共同的运动矢量,并且像素的运动矢量的水平/垂直分量可以取得除了相邻像素之间的距离的整数倍的任何值。 指定用于合成预测图像的每个像素的运动矢量的水平和垂直分量,以便仅获得1 / d1和1 / d2的整数倍值(其中d1,d2是 相邻像素之间的距离的正整数)。 由此,可以通过简单的计算来防止由运动矢量的计算精度的差异引起的预测图像的不匹配,这导致处理的简化。 版权所有(C)2005,JPO&NCIPI