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    • 32. 发明授权
    • System and method for estimating motion vector in macro block
    • 用于估计宏块中的运动矢量的系统和方法
    • US6031582A
    • 2000-02-29
    • US993747
    • 1997-12-19
    • Tsuyoshi NishikawaYoshiro TsuboiMasafumi Takahashi
    • Tsuyoshi NishikawaYoshiro TsuboiMasafumi Takahashi
    • H04N11/04G06T1/20G06T7/20H04N19/105H04N19/136H04N19/176H04N19/196H04N19/423H04N19/50H04N19/51H04N7/30H04N7/32
    • H04N19/557H04N19/51
    • A motion vector estimating system prepares a predetermined range of a frame/field of image data as a macro block, selects a plurality of proposed motion vectors in the reference region, calculates a signal-strength difference between pixels corresponding to each of the proposed motion vectors of current and reference images. The system comprises: an accumulating element for deriving an accumulation result in parallel on the basis of the signal-strength difference by means of accumulating circuits connected in parallel as a pipeline; an accumulation stopping element having separate stop circuits for separately stopping the accumulation of the accumulating element every n accumulating circuits; and a control element for controlling the supply of the current image data and the reference image data for proposed motion vectors for each of the accumulating circuits, and for outputting a separate stop signal to the accumulation stopping element for stopping the accumulation for the proposed motion vector of the accumulating circuits immediately after the accumulated value of the absolute values of the differences between the signal values of picture elements of the current image and the reference image exceeds a predetermined value. Thus, it is possible to suitably omit unnecessary accumulation in a pipeline processing for estimating a motion vector, so that it is possible to increase the processing speed and to decrease the electric power consumption.
    • 运动矢量估计系统准备作为宏块的图像数据的帧/场的预定范围,在参考区域中选择多个提出的运动矢量,计算与提出的每个运动矢量相对应的像素之间的信号强度差 的当前和参考图像。 该系统包括:累积元件,用于通过累积作为管道并联连接的电路,基于信号强度差导出累积结果; 累积停止元件具有分开的停止电路,用于每n个累积电路分别停止累积元件的累积; 以及控制元件,用于控制针对每个累加电路的所提出的运动矢量的当前图像数据和参考图像数据的供给,并且用于向累积停止元件输出单独的停止信号,以停止所提出的运动矢量的累积 紧接在当前图像的像素的信号值与参考图像之间的差的绝对值的累加值之后的累积电路的值超过预定值。 因此,可以适当地省略用于估计运动矢量的流水线处理中的不必要的累积,从而可以提高处理速度并降低电力消耗。
    • 35. 发明授权
    • Wireless receiver
    • 无线接收器
    • US08295365B2
    • 2012-10-23
    • US11775252
    • 2007-07-10
    • Masafumi Takahashi
    • Masafumi Takahashi
    • H04N7/12
    • H04L7/0337H04N21/2368H04N21/41407H04N21/4305H04N21/4341
    • A bitstream analysis circuit, generates a reference clock control data. A reference clock DPLL receives a system clock signal and reference clock control data from the analysis circuit and generates a reference clock signal. The reference clock DPLL comprises a 1/n frequency dividing circuit for frequency-dividing the system clock signal, and a 1/(n+1) frequency dividing circuit for frequency-dividing the system clock signal. A register stores data to set frequency dividing ratios of both frequency dividing circuits. A mixing ratio set register stores data to set a mixing ratio between output clock signals from both frequency dividing circuits and a mixing circuit, and mixes the output clock signals from both frequency dividing circuits at a mixing ratio in response to the data in the mixing ratio setting register.
    • 比特流分析电路,生成参考时钟控制数据。 参考时钟DPLL从分析电路接收系统时钟信号和参考时钟控制数据,并产生参考时钟信号。 参考时钟DPLL包括用于对系统时钟信号进行分频的1 / n分频电路和用于对系统时钟信号进行分频的1 /(n + 1)分频电路。 寄存器存储数据以设置两个分频电路的分频比。 混合比设定寄存器存储数据,以设定来自两个分频电路和混合电路的输出时钟信号之间的混合比,并且以混合比率混合来自两个分频电路的输出时钟信号,混合比率 设定寄存器。