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    • 4. 发明授权
    • Motion video coding systems with motion vector detection
    • 具有运动矢量检测的运动视频编码系统
    • US5808700A
    • 1998-09-15
    • US825397
    • 1997-03-28
    • Etsuko SugimotoTakashi UranoSatoko KobayashiYasuhachi HamamotoHideo Kodama
    • Etsuko SugimotoTakashi UranoSatoko KobayashiYasuhachi HamamotoHideo Kodama
    • H04N7/26H04N7/36H04N7/50
    • H04N19/507H04N19/43H04N19/51
    • A motion vector detecting circuit and a motion video compressing system are disclosed. The detecting circuit detect a vector which direct from a spatial location of a current macroblock to a spatial location of a reference macroblock. The detecting circuit includes a first extracting circuit, a second extracting circuit and a searching circuit. The first extracting circuit extracts upper bits from each pixel data of the current macroblock. The second extracting circuit extracts upper bits from each pixel data of the reference frame. The searching circuit searches the upper-bits-extracted reference frame for a macroblock having the strongest correlation with the current macroblock by comparing the upper-bits-extracted current macroblock with the upper-bits-extracted reference frame and outputs the spatial location of the reference macroblock. The motion video compressing system includes the motion vector detecting circuit, a transform-coding circuit, a subtracter, a comparator and a controller. The transform-coding circuit codes inputted data into compressed. The subtracter calculates a difference between each pixel data of the current macroblock and each corresponding pixel data of the reference macroblock directed by the motion vector. The comparator compares an amount of data being obtained by the transform-coding the current macroblock with an amount of data being obtained by the transform-coding the differential macroblock. The controller controls the transform-coding circuit such that the transform-coding circuit outputs which of the compressed current macroblock and the compressed differential macroblock has a smaller amount of data.
    • 公开了运动矢量检测电路和运动视频压缩系统。 检测电路检测从当前宏块的空间位置引导到参考宏块的空间位置的向量。 检测电路包括第一提取电路,第二提取电路和搜索电路。 第一提取电路从当前宏块的每个像素数据中提取高位。 第二提取电路从参考帧的每个像素数据中提取高位。 搜索电路通过将高比特率提取的当前宏块与高位提取的参考帧进行比较,来搜索与比特提取的参考帧中的与当前宏块最相关的宏块,并输出参考的空间位置 宏块。 运动视频压缩系统包括运动矢量检测电路,变换编码电路,减法器,比较器和控制器。 变换编码电路对输入的数据进行压缩编码。 减法器计算当前宏块的每个像素数据和由运动向量指导的参考宏块的每个对应像素数据之间的差。 比较器将通过对当前宏块进行变换编码获得的数据量与通过对差分宏块进行变换编码获得的数据量进行比较。 控制器控制变换编码电路,使得变换编码电路输出压缩的当前宏块和压缩的差分宏块中的哪一个具有较小的数据量。
    • 7. 发明授权
    • Motion video coding systems with motion vector detection
    • 具有运动矢量检测的运动视频编码系统
    • US5650829A
    • 1997-07-22
    • US425647
    • 1995-04-20
    • Etsuko SugimotoTakashi UranoSatoko KobayashiYasuhachi HamamotoHideo Kodama
    • Etsuko SugimotoTakashi UranoSatoko KobayashiYasuhachi HamamotoHideo Kodama
    • H04N7/26H04N7/36H04N7/50
    • H04N19/507H04N19/43H04N19/51
    • A motion vector detecting circuit and a motion video compressing system are disclosed. The detecting circuit detect a vector which direct from a spatial location of a current macroblock to a spatial location of a reference macroblock. The detecting circuit includes a first extracting circuit, a second extracting circuit and a searching circuit. The first extracting circuit extracts upper bits from each pixel data of the current macroblock. The second extracting circuit extracts upper bits from each pixel data of the reference frame. The searching circuit searches the upper-bits-extracted reference frame for a macroblock having the strongest correlation with the current macroblock by comparing the upper-bits-extracted current macroblock with the upper-bits-extracted reference frame and outputs the spatial location of the reference macroblock. The motion video compressing system includes the motion vector detecting circuit, a transform-coding circuit, a subtracter, a comparator and a controller. The transform-coding circuit codes inputted data into compressed. The subtracter calculates a difference between each pixel data of the current macroblock and each corresponding pixel data of the reference macroblock directed by the motion vector. The comparator compares an amount of data being obtained by the transform-coding the current macroblock with an amount of data being obtained by the transform-coding the differential macroblock. The controller controls the transform-coding circuit such that the transform-coding circuit outputs which of the compressed current macroblock and the compressed differential macroblock has a smaller amount of data.
    • 公开了运动矢量检测电路和运动视频压缩系统。 检测电路检测从当前宏块的空间位置引导到参考宏块的空间位置的向量。 检测电路包括第一提取电路,第二提取电路和搜索电路。 第一提取电路从当前宏块的每个像素数据中提取高位。 第二提取电路从参考帧的每个像素数据中提取高位。 搜索电路通过将高比特率提取的当前宏块与高位提取的参考帧进行比较,来搜索与比特提取的参考帧中的与当前宏块最相关的宏块,并输出参考的空间位置 宏块。 运动视频压缩系统包括运动矢量检测电路,变换编码电路,减法器,比较器和控制器。 变换编码电路对输入的数据进行压缩编码。 减法器计算当前宏块的每个像素数据和由运动向量指导的参考宏块的每个对应像素数据之间的差。 比较器将通过对当前宏块进行变换编码获得的数据量与通过对差分宏块进行变换编码获得的数据量进行比较。 控制器控制变换编码电路,使得变换编码电路输出压缩的当前宏块和压缩的差分宏块中的哪一个具有较小的数据量。