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    • 4. 发明授权
    • Resource allocation method in a PCA period of MBOA MAC
    • 在MBA MAC的PCA期间的资源分配方法
    • US07624214B2
    • 2009-11-24
    • US11861640
    • 2007-09-26
    • Seong Hee LeeSeong Hee ParkIl Soon JangSang Sung Choi
    • Seong Hee LeeSeong Hee ParkIl Soon JangSang Sung Choi
    • G06F13/00
    • G06F13/387
    • A resource allocation method for performing resource competition between protocols based on a protocol in a home network environment using multiple protocols is provided. In the resource allocation method, a request of using a resource is received from an external device. An AIFS value is allocated according to a data type of the resource requested from the device. Then, the resource is not provided to the device for an AIFS period. After passing the period of the AIFS value, a back-off timer period is entered. In the back-off timer period, an application protocol of the external device requesting the resource is identified, and an idle time value is allocated according to a type of the identified protocol. Then, a corresponding resource is provided to the first device coming out of the allocated idle time.
    • 提供了一种用于在使用多种协议的家庭网络环境中基于协议执行协议之间的资源竞争的资源分配方法。 在资源分配方法中,从外部设备接收到使用资源的请求。 根据从设备请求的资源的数据类型分配AIFS值。 然后,资源没有提供给AIFS周期的设备。 在通过AIFS值的周期后,输入退避定时器周期。 在退避定时器周期中,识别请求资源的外部设备的应用协议,并且根据所识别的协议的类型来分配空闲时间值。 然后,将相应的资源提供给从分配的空闲时间出来的第一设备。
    • 5. 发明申请
    • Clock Synchronization Method For Wireless 1394 Heterogeneous Networks
    • 无线1394异构网络的时钟同步方法
    • US20080212564A1
    • 2008-09-04
    • US11994453
    • 2006-07-18
    • Seong-Hee LeeSeong-Hee ParkSang-Sung Choi
    • Seong-Hee LeeSeong-Hee ParkSang-Sung Choi
    • H04J3/06
    • H04L12/4625
    • Provided is a clock synchronization method in a heterogeneous network. The method includes the steps of: at a cycle master, transferring a cycle begin packet with a current time to a transmitting-side bridge; at the transmitting-side bridge, synchronizing using the time included in the cycle begin packet and a time to transmit the cycle begin packet, and transmitting the cycle begin packet with a first synchronization time to a wireless 1394 coordinator; at the wireless 1394 coordinator, synchronizing using the first synchronization time and calculating a second synchronization time; at the wireless 1394 coordinator, transmitting the beacon frame with a created information element structure to a receiving side bridge on a wired IEEE 1394 network; at the receiving bridge, synchronizing using the second synchronization time and calculating a third synchronization time; and at the receiving-side bridge, synchronizing the heterogeneous network by transferring the third synchronization time to the receiving node.
    • 提供了异构网络中的时钟同步方法。 该方法包括以下步骤:在循环主站处,将具有当前时间的周期开始分组传送到发送侧桥; 在发送侧网桥中,使用包含在周期开始分组中的时间进行同步,并发送周期开始分组的时间,并将具有第一同步时间的周期开始分组发送到无线1394协调器; 在无线1394协调器处,使用第一同步时间同步并计算第二同步时间; 在无线1394协调器处,将具有创建的信息元素结构的信标帧发送到有线IEEE 1394网络上的接收侧桥; 在接收桥上,使用第二同步时间同步并计算第三同步时间; 并且在接收侧网桥处,通过将第三同步时间传送到接收节点来同步异构网络。
    • 10. 发明授权
    • Apparatus and method for driving plasma display panel
    • 用于驱动等离子体显示面板的装置和方法
    • US07471263B2
    • 2008-12-30
    • US11008674
    • 2004-12-10
    • Jun Hak LeeJeong Pil ChoiSeong Hee Park
    • Jun Hak LeeJeong Pil ChoiSeong Hee Park
    • G09G3/28
    • G09G3/2037G09G3/2033G09G3/2051G09G3/288G09G3/298G09G2320/0266G09G2320/0626G09G2320/0666
    • Disclosed herein is an apparatus for driving a plasma display panel in which a gray scale inversion phenomenon can be prevented. According to the present invention, the apparatus for driving the PDP includes an error diffusion unit for diffusing error of data received from an inverse gamma correction unit, a gray scale inversion check unit connected to the inverse gamma correction unit, for checking whether a gray scale value of the data received from the inverse gamma correction unit is a gray scale value where a gray scale inversion phenomenon is generated, and generating a 1-bit control signal according to the check result, an adder disposed between the error diffusion unit and the gray scale inversion check unit, for adding the 1-bit control signal to lower bits of the data received from the error diffusion unit, and a dithering unit for performing dithering by using the lower bits received from the adder. Therefore, when dithering is performed on data where gray scale inversion is generated, a gray scale value can be improved by adding 1 to lowest bits of the data. It is thus possible to prevent the gray scale inversion phenomenon.
    • 本文公开了一种用于驱动等离子体显示面板的装置,其中可以防止灰度反转现象。 根据本发明,用于驱动PDP的装置包括用于扩散从反伽马校正单元接收的数据的误差的误差扩散单元,连接到反伽马校正单元的灰度反转检查单元,用于检查灰度级 从反伽马校正单元接收的数据的值是产生灰度反转现象的灰度值,并且根据检查结果产生1位控制信号,设置在误差扩散单元和灰度之间的加法器 用于将1位控制信号添加到从误差扩散单元接收的数据的较低位;以及抖动单元,用于通过使用从加法器接收的低位执行抖动。 因此,当对生成灰度反转的数据进行抖动时,可以通过将1加到数据的最低位来提高灰度值。 因此可以防止灰度反转现象。