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    • 84. 发明申请
    • SIMD four-pixel average instruction for imaging and video applications
    • 用于成像和视频应用的SIMD四像素平均指令
    • US20050213842A1
    • 2005-09-29
    • US10814991
    • 2004-03-26
    • Bradley AldrichNigel PaverJianwei Liu
    • Bradley AldrichNigel PaverJianwei Liu
    • G06K9/40G06T3/40H04N7/26H04N7/36
    • G06T3/4023G06T3/4007H04N19/42H04N19/51
    • According to some embodiments, a Single-Instruction/Multiple-Data (SIMD) averaging instruction is used to process pixels of image data. The averaging instruction generates a set of four-pixel averages, where each average is generated from two pixels in a first source register and two pixels in a second source register. The first source register contains a plurality of pixels from a first row of pixels and the second source register contains a plurality of pixels from a second row. In one embodiment, the first and second rows are adjacent rows in an image and the averaging instruction is used, for example, to down-scale an image, perform color conversion, and the like. In another embodiment, the first and second rows are from different images and the averaging instruction is used, for example, in motion estimation for video encoding, in motion compensation for video decoding, and the like.
    • 根据一些实施例,使用单指令/多数据(SIMD)平均指令来处理图像数据的像素。 平均指令产生一组四像素平均值,其中每个平均值由第一源寄存器中的两个像素和第二源寄存器中的两个像素生成。 第一源寄存器包含来自第一行像素的多个像素,并且第二源寄存器包含来自第二行的多个像素。 在一个实施例中,第一行和第二行是图像中的相邻行,并且使用平均指令来例如缩小图像,执行颜色转换等。 在另一个实施例中,第一行和第二行来自不同的图像,并且平均指令用于例如用于视频编码的运动估计,用于视频解码的运动补偿等。