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    • 10. 发明授权
    • Arithmetic unit, correlation arithmetic unit and dynamic image compression apparatus
    • 算术单元,相关运算单元和动态图像压缩装置
    • US06272510B1
    • 2001-08-07
    • US09236225
    • 1999-01-25
    • Susumu KawakamiHiroaki OkamotoMotomu Takatsu
    • Susumu KawakamiHiroaki OkamotoMotomu Takatsu
    • G06F1715
    • G06F17/15
    • In a correlation arithmetic system adapted to detect a relative difference between two functions, an operation is simplified. This makes it possible to perform the operation with a small scale of hardware and also with great accuracy. There is adopted an operation g*h instead of the “product” in the correlation arithmetic operation. There is disclosed an arithmetic unit in which two numeral values a and b are inputted, and the two numerical values a and b are subjected to a predetermined operation process, so that a numerical value c representative of an operation result is derived. The arithmetic unit has an absolute value operation unit for evaluating an absolute value |c| of the numerical value c, and a sign operation unit for evaluating a sign “sign (c)” of the numerical value c.
    • 在适于检测两个功能之间的相对差异的相关运算系统中,简化了操作。 这使得可以以小规模的硬件并且以很高的精度执行操作。 在相关算术运算中采用运算g * h而不是“乘积”。 公开了一种运算单元,其中输入两个数字值a和b,并且对两个数值a和b进行预定的操作处理,从而导出代表运算结果的数值c。 算术单元具有用于评估绝对值| c |的绝对值运算单元 的数字值c的符号“sign(c)”的符号运算单元。