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    • 1. 发明授权
    • Motion vector detection system
    • 运动矢量检测系统
    • US06414995B2
    • 2002-07-02
    • US09771550
    • 2001-01-30
    • Seiji OkumuraYoshiko Hatano
    • Seiji OkumuraYoshiko Hatano
    • H04N712
    • H04N19/51H04N5/145H04N19/533H04N19/56H04N19/57
    • The present invention relates to a motion vector detection method and system for detecting a motion vector for motion compensation in moving picture compression. The motion vector detection system reduces the amount of operations without degrading the quality of an image. A vector memory stores a motion vector having been obtained. A predicted motion vector calculator predicts the motion vector of a block to be predicted based upon the motion vector of a block adjacent to the block to be predicted. The search range determiner determines a search range based upon the motion vector predicted. The motion vector detector performs block matching within the search range.
    • 本发明涉及一种用于检测运动图像压缩中运动补偿的运动矢量的运动矢量检测方法和系统。 运动矢量检测系统减少了操作量而不降低图像的质量。 向量存储器存储已经获得的运动矢量。 预测运动矢量计算器基于与要预测的块相邻的块的运动矢量来预测要预测的块的运动矢量。 搜索范围确定器基于预测的运动矢量来确定搜索范围。 运动矢量检测器在搜索范围内执行块匹配。
    • 6. 发明授权
    • Coding apparatus
    • US5204743A
    • 1993-04-20
    • US631796
    • 1990-12-21
    • Yoshiko HatanoYoshinori AsamuraKen Onishi
    • Yoshiko HatanoYoshinori AsamuraKen Onishi
    • A coding apparatus, in which each block having a plurality of picture elements with digital image signals is divided into a plurality of sub-blocks, and an appropriate quantization step or weighting factor is decided on the basis of the absolute value sum of difference of image signal level between adjacent picture elements in the sub-block, so that a digital image signal is reduced. Moreover, a coding apparatus, in which each block having a plurality of picture elements with digital image signals is divided into a plurality of sub-blocks, and an appropriate quantization step or weighting factor is decided on the basis of the maximum and minimum values of the image signals of the picture elements in the sub-block, so that a digital image signal is reduced. Accordingly, in the coding apparatus as above, the state of the image is recognized for every block, whereby a block whose degradation of image quality is hard to notice at the decoder side is quantized or subjected to weighting with low rate, that is, with large reduction rate, whereas a block whose degradation of image quality is conspicuous at the decoder side is quantized or subjected to weighting with high rate, i.e., with small reduction rate. As a result, the image quality of the background having little change in the signal is kept good.
    • 7. 发明授权
    • Frequency demodulator with reversal phenomenon compensation
    • 频率解调器具有反转现象补偿
    • US4906942A
    • 1990-03-06
    • US284657
    • 1988-12-15
    • Takahiro NakaiKeiji HatanakaYoshiko Hatano
    • Takahiro NakaiKeiji HatanakaYoshiko Hatano
    • H03D3/00H04N5/93
    • H04N5/93H03D3/002H03D3/006H03D2200/005H03D2200/0052H03D2200/0054H03D2200/0062H03D2200/0082
    • A frequency demodulator which comprises a digital FM demodulating circuit for demodulating an inputted FM signal and outputting a digital demodulated signal, a discriminator for discriminating whether or not the value of the digital demodulated signal from the digital FM demodulating circuit deviates from an upper limit value or a lower limit value set for a normal demodulating range, and a circuit operable on the basis of a result of the discrimination performed by the discriminator for replacing the value of the demodulated signal deviating from the upper limit value or the lower limit value with a compensation value set to a value approximating the upper limit value in the case where the inputted FM signal which has been demodulated is of a type having upper and lower side-bands suppressed and emphasized, respectively, or with a compensation value set to a value approximating the lower limit value in the case where the inputted FM signal which has been demodulated is of a type having upper and lower side-bands emphasized and suppressed, respectively.
    • 一种频率解调器,包括用于解调输入的FM信号并输出​​数字解调信号的数字FM解调电路,用于鉴别来自数字FM解调电路的数字解调信号的值是否偏离上限值的鉴别器, 为正常解调范围设定的下限值,以及根据鉴别器执行的鉴别结果可操作的电路,用于用补偿来替代偏离上限值或下限值的解调信号的值 在被解调的输入的FM信号分别被抑制和强调的上下边带的类型的情况下,或者将被设置为接近的边界值的补偿值分别设定为接近上限值的值 在被解调的输入的FM信号为havin的情况下的下限值 g分别强调和抑制上下边带。