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    • 4. 发明授权
    • Hierarchical time to digital converter
    • 数字转换器的分层时间
    • US07791377B2
    • 2010-09-07
    • US12033782
    • 2008-02-19
    • Chulwoo KimMinyoung SongSunghoon Ahn
    • Chulwoo KimMinyoung SongSunghoon Ahn
    • G01R29/00H03D3/00H03D9/00
    • H03K5/159G04F10/06H03K2005/00286
    • A time to digital converter having a hierarchical structure is provided. The time to digital converter includes: a plurality of delay stages for sequentially delaying a first signal for a specific delay time; a plurality of flip-flops for comparing delay signals of the first signal delayed by the delay stages with a second signal, and generating different outputs before and after a phase difference between the delay signals of the first signal and the second signal becomes smaller than a resolution of the phase detector; a selection signal generator for generating a selection signal for selecting a signal most similar to the second signal among the delay signals of the first signal from the outputs of the flip-flops; and a Multiplexer (MUX) for receiving the delay signals of the first signal and the selection signal, and outputting the signal most similar to the second signal among the delay signals of the first signal.
    • 提供具有层次结构的时间到数字转换器。 数字转换器的时间包括:多个延迟级,用于在特定延迟时间内顺序地延迟第一信号; 多个触发器,用于将由延迟级延迟的第一信号的延迟信号与第二信号进行比较,并且在第一信号和第二信号的延迟信号之间的相位差之前和之后产生不同的输出变得小于 相位检测器的分辨率; 选择信号发生器,用于从所述触发器的输出产生用于从所述第一信号的延迟信号中选择与所述第二信号最相似的信号的选择信号; 以及用于接收第一信号和选择信号的延迟信号的多路复用器(MUX),并且在第一信号的延迟信号中输出与第二信号最相似的信号。
    • 9. 发明授权
    • Circuit and related method for synchronizing data signals to a core clock
    • 用于将数据信号同步到核心时钟的电路和相关方法
    • US07698588B2
    • 2010-04-13
    • US10439039
    • 2003-05-15
    • David William BoerstlerChulwoo KimStephen Douglas Weitzel
    • David William BoerstlerChulwoo KimStephen Douglas Weitzel
    • G06F1/12G06F1/04H04L7/10
    • H04L7/0012
    • The present invention discloses, in one aspect, a synchronizing circuit for synchronizing transmitted data. In one embodiment, the synchronization technique comprises a subsystem configured to compare positive and negative transitions of a core clock signal with positive and negative transitions of a source clock signal to determine a relationship between the transitions of the core clock signal and positions of the negative transitions of the source clock signal. The synchronization circuit also comprises logic circuitry coupled to the subsystem and configured to generate a final sampling signal based on the relationship. In addition, the synchronization circuit comprises a data sampler coupled to the logic circuitry and configured to sample a source data signal synchronized with the source clock signal using the final sampling signal, and to generate a core data signal synchronized with the core clock signal based on the sampling. Also disclosed is a method of synchronizing a data stream, and a data transfer assembly incorporating the synchronization circuit and the method.
    • 本发明在一个方面公开了一种用于同步发送数据的同步电路。 在一个实施例中,同步技术包括子系统,被配置为将核心时钟信号的正和负转换与源时钟信号的正和负转换进行比较,以确定核心时钟信号的转变与负转换位置之间的关系 的源时钟信号。 同步电路还包括耦合到子系统并被配置为基于该关系产生最终采样信号的逻辑电路。 另外,同步电路包括耦合到逻辑电路并被配置为使用最终采样信号对与源时钟信号同步的源数据信号进行采样的数据采样器,并且产生与基于时钟信号同步的核心数据信号 抽样。 还公开了一种同步数据流的方法,以及包含同步电路和方法的数据传输组件。
    • 10. 发明申请
    • Method and Apparatus for Determining Search Range for Adaptive Motion Vector for Use in Video Encoder
    • 用于确定视频编码器中使用的自适应运动矢量的搜索范围的方法和装置
    • US20080170616A1
    • 2008-07-17
    • US10552938
    • 2004-04-08
    • Inseong HwangChulwoo KimMin-Cheol HongKyoung-Seok In
    • Inseong HwangChulwoo KimMin-Cheol HongKyoung-Seok In
    • H04N7/32
    • H04N19/57H04N19/105H04N19/162H04N19/176H04N19/61
    • The video encoder in accordance with the present invention divides input image signal into macro blocks, estimates motion vectors of each macro block and finally encodes the input image signal. The encoder determines the number of macro blocks adjacent to a current macro block. If the number of adjacent macro blocks is equal to or more than two, the encoder calculates a motion vector of the adjacent macro blocks and selects a macro block that has the largest motion vector. Then it defines a least search area that the current adaptive motion vector can have, and compares the least search area with the motion vector of the largest adjacent macro block, and finally determines the largest value as the search area of the adaptive motion vector. Next, the encoder compares the search area of the adaptive motion vector with the search area of the user-defined motion adaptive vector to thereby determine the least value as the search area of the final adaptive motion vector.
    • 根据本发明的视频编码器将输入图像信号分成宏块,估计每个宏块的运动矢量,并最终对输入的图像信号进行编码。 编码器确定与当前宏块相邻的宏块的数量。 如果相邻宏块的数量等于或大于2,则编码器计算相邻宏块的运动矢量,并选择具有最大运动矢量的宏块。 然后定义当前自适应运动矢量可以具有的最小搜索区域,并将最小搜索区域与最大相邻宏块的运动矢量进行比较,最后确定最大值作为自适应运动矢量的搜索区域。 接下来,编码器将自适应运动矢量的搜索区域与用户定义的运动自适应矢量的搜索区域进行比较,从而确定最小值作为最终自适应运动矢量的搜索区域。