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    • 53. 发明授权
    • Data compression for indexed color image data
    • 索引彩色图像数据的数据压缩
    • US5659631A
    • 1997-08-19
    • US391679
    • 1995-02-21
    • Michael J. GormishEdward L. Schwartz
    • Michael J. GormishEdward L. Schwartz
    • G06T9/00H03M7/40H04N1/41H04N1/64H04N11/04G06K9/00H04N1/40
    • H04N11/042H04N1/644H04N19/593
    • A data compression system separates input data into color planes prior to compression. If needed for legacy game consoles, compression is performed by a game cartridge transparent to the console. To minimize the number of passes required of a coder/decoder, color planes are ordered by density and the densest color plane is coded first. After the first color plane is coded, other color planes are coded, but pixels which are known to have colors from previously coded color planes are not coded. The last color plane is not coded, but is deduced from all the other color planes. Alternatively, pixel color values are represented by vectors with components thereof separately coded by subcolor planes. Also, each color plane can be coded until a threshold number of pixels are coded, and the remaining pixels coded by bit plane. The image data could be coded using pixel position information as context.
    • 数据压缩系统在压缩之前将输入数据分为彩色平面。 如果传统游戏机需要,压缩由对控制台透明的游戏盒执行。 为了最小化编码器/解码器所需的通过次数,通过密度对色面进行排序,并且首先对最密集的颜色平面进行编码。 在第一个彩色平面被编码之后,其他的彩色平面被编码,但是已知具有来自先前编码的颜色平面的颜色的像素不被编码。 最后一个彩色平面不是编码的,而是从所有其他颜色平面推导出来的。 或者,像素颜色值由其分量由子着色平面编码的矢量表示。 此外,每个彩色平面可被编码,直到阈值数量的像素被编码,并且剩余像素由位平面编码。 图像数据可以使用像素位置信息作为上下文进行编码。