公开(公告)号：EP1443461A1

公开(公告)日：2004-08-04

申请号：EP03002205.7

申请日：2003-01-31

Applicant: STMicroelectronics S.r.l.

Inventor： Barone, Massimiliano ,  Vitali, Andrea ,  Pau, Danilo Pietro ,  Sirtori, Daniele ,  Lavigna, Daniele ,  Gardella, Pierluigi

IPC: G06T9/00

CPC classification number: G06T9/005

Abstract: A method for texture compressing images having a plurality of color components (R, G, B) includes the step of defining color representatives for use in encoding by defining groups of colors for each said color component (R,G,B), and selecting for each said group a representative color for the group, the median color being chosen as the representative color of the group. Each said group is preferably composed of 3 to 15 colors and the method includes the step of computing, for each group, an error between each member of the group and said representative color of the group. Typically, the error is computed as the sum of the absolute differences (SAD) between each member of the group and said representative color of the group. In order to select each said group and then extract therefrom said representative color, a criterium is used selected from the group consisting of:

selecting the group that minimizes said error by assuming each group comprised of the lower colors sorted in ascending order, wherein the same applies for the groups comprised of the higher colors,
accruing the error as computed separately for two groups in all possible combinations and finding the minimum of the composite error.

Abstract translation: 用于纹理压缩具有多个颜色分量（R，G，B）的图像的方法包括通过为每个所述颜色分量（R，G，B）定义颜色组来定义用于编码的颜色代表的步骤，以及选择 对于每个所述组，该组的代表颜色，中间颜色被选择为该组的代表颜色。 每个所述组优选地由3至15种颜色组成，并且该方法包括以下步骤：针对每个组计算组的每个成员与组的所述代表颜色之间的误差。 通常，误差被计算为组的每个成员与组的所述代表颜色之间的绝对差（SAD）之和。 为了选择每个所述组，然后从其中提取所述代表性颜色，使用选自以下的标准：选择通过假设由按升序排列的较低颜色组成的每个组，使所述误差最小化的组，其中相同 适用于由较高颜色组成的组，在所有可能的组合中分别计算出两组的误差，并找出复合误差的最小值。

公开(公告)号：EP1378824A1

公开(公告)日：2004-01-07

申请号：EP02425436.9

申请日：2002-07-02

Applicant: STMicroelectronics S.r.l.

Inventor： Borneo, Antonio Maria ,  Rovati, Fabrizio Simone ,  Pau, Danilo Pietro

IPC: G06F9/38

CPC classification number: G06F9/3879 ,  G06F9/3853 ,  G06F9/3877

Abstract: Programs having a given instruction-set architecture (ISA) are executed on a multiprocessor system comprising a plurality of processors, for example of a VLIW type, each of said processors being able to execute, at each processing cycle, a respective maximum number of instructions. The instructions are compiled as instruction words of given length (L1 respectively L2) executable on a first processor (VLIW 1 respectively VLIW 2). At least some of the instruction words of given length are converted (IIU) into modified-instruction words executable on a second processor. The operation of modifying comprises in turn at least one operation chosen in the group consisting of:

splitting the instruction words into modified-instruction words; and
entering no-operation (nop) instructions in the modified-instruction words.

Abstract translation: 具有给定的指令集架构（ISA）的程序被执行的多处理器系统，其包括处理器上的多个，对于VLIW类型的实施例，每个所述处理器能够执行，在每个处理循环中，指令的respectivement最大数目 ， 该指令被编译为在第一处理器上给定长度（L1分别L2）可执行的指令字（VLIW 1分别VLIW 2）。 至少一些给定长度的指令字的转换（IIU）转换成在第二处理器上执行的修改的指令字。 反过来至少一个手术选择的组中的由...组成，所述修改包括的手术：将所述指令字写入改性指令字; 并进入经修改的指令字无操作（NOP）指令。